LID, CONTAINER WITH LID, AND COMBINATION OF LID AND CONTAINER

Abstract

A lid is formed to be joinable to a container having an opening at the upper end and an edge forming the outer periphery, a base portion having a joint area corresponding portion corresponding to the area joined to the container along the edge and a small opening with a smaller opening area than that of the container, a small lid portion for opening and closing the small opening, and a hinge portion connecting the base and small lid portions, the small lid portion being rotatable relative to the base portion about the hinge portion, having a margin portion that, in a plan view of the base, is formed inside the inner edge of the joint area corresponding portion and outside the opening edge of the small opening, and when a line segment connecting the margin and hinge portions is assumed, passes through the opening edge of the small opening.

Claims

1. A lid configured to be joinable to a container having an opening at an upper end and an edge forming an outer periphery of the opening, the lid comprising a base portion having a joining area corresponding portion that corresponds to an area joined to the container along the edge of the container and a small opening with an opening area smaller than the opening of the container, a small lid portion for opening and closing the small opening, and a hinge portion connecting the base portion and the small lid portion, wherein the small lid portion is configured to be rotatable with respect to the base portion with the hinge portion as an axis, and in a plan view of the base portion, the base portion has an eave portion outside an opening edge of the small opening.

2. The lid according to claim 1, wherein the eave portion is a margin portion satisfying the following conditions in the plan view of the base portion: the margin portion is inside from an inner edge of the joining area corresponding portion and outside of the opening edge of the small opening in the base portion; and a line segment connecting the margin portion and the hinge portion passes through the opening edge of the small opening.

3. The lid according to claim 2, wherein the area of the margin portion is smaller than the area of the small opening in the plan view of the base portion.

4. The lid according to claim 2, wherein the margin portion is formed such that the inner edge and the outer edge of the margin portion are non-concentric.

5. The lid according to claim 2, wherein the margin portion has an inclined portion sloping downward from the outer edge to the inner edge of the margin portion.

6. The lid according to claim 1, wherein a knob portion is on an upper surface side of the small lid portion.

7. The lid according to claim 6, wherein the knob portion has a tab member, and the tab member is joined to the upper surface side of the small lid portion.

8. The lid according to claim 7, wherein when the small lid portion closes the small opening, a part of the tab member intersects the opening edge of the small opening in the plan view of the base portion.

9. The lid according to claim 6, further comprising a holding structure forming portion that holds the small lid portion in a state where the small lid portion is rotated with respect to the base portion with the hinge portion as an axis to open the small opening, and a claw portion is on the knob portion, wherein the base portion comprises a receiving portion at a position contacting the claw portion, and the claw portion and the receiving portion form the holding structure forming portion.

10. The lid according to claim 1, further comprising an extending portion on the outer periphery of the base portion.

11. The lid according to claim 10, further comprising a holding structure forming portion that holds the small lid portion in a state where the small lid portion is rotated with respect to the base portion with the hinge portion as an axis to open the small opening, a knob portion on an upper surface side of the small lid portion, and a claw portion on the knob portion, wherein the extending portion and the claw portion form the holding structure forming portion.

12. The lid according to claim 10, wherein the hinge portion is between the extending portion and a tip of the small lid portion.

13. The lid according to claim 1, wherein a recessed portion is in an inner part of the joining area corresponding portion.

14. The lid according to claim 1, wherein a protruding portion is on the outer periphery of the small lid portion, and a concave portion corresponding to the protruding portion is on the opening edge of the small opening.

15. The lid according to claim 1, wherein a recessed portion is on the outer periphery of the small lid portion, and a convex portion corresponding to the recessed portion is on the opening edge of the small opening.

16. The lid according to claim 1, further comprising a connection structure connecting the outer periphery of the small lid portion and the opening edge of the small opening, wherein the connection structure is a fragile portion more fragile than the small lid portion, and when the small lid portion rotates relative to the base portion about the hinge portion, the fragile portion is destroyed.

17. The lid according to claim 16, wherein the fragile portion has a combination structure of a connecting portion and a notch, and/or a half-cut structure.

18. The lid according to claim 1, wherein the lid is formed of paper-based material.

19. An assembly comprising the lid according to claim 1 and, the container, wherein the lid is joined to the container.

20. A combination comprising the lid according to claim 1 and, the container.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0071] FIG. 1A is a plan view showing an example of a lid according to the first embodiment. FIG. 1B is a cross-sectional view schematically showing the state of the A-A line longitudinal section of FIG. 1A.

[0072] FIG. 2 is a plan view showing an example of a lid according to the first embodiment.

[0073] FIG. 3A is a perspective view showing an example of a container with a lid. FIG. 3B is a cross-sectional view schematically showing the state of the B-B line longitudinal section of FIG. 3A.

[0074] FIG. 4 is a plan view showing an example of a lid according to the first modification of the first embodiment.

[0075] FIG. 5 is a plan view showing an example of a lid according to the second embodiment.

[0076] FIG. 6 is a plan view showing an example of a lid according to the second modification of the second embodiment.

[0077] FIG. 7 is a plan view showing an example of a lid according to the second modification of the second embodiment.

[0078] FIG. 8A is a cross-sectional view schematically showing the state of the C-C line longitudinal section of FIG. 7. FIG. 8B is a cross-sectional view schematically showing an example when a holding structure is formed on the lid.

[0079] FIG. 9A is a plan view showing an example of a lid according to the first embodiment. FIG. 9B is a plan view showing an example of a lid according to the sixth modification of the first embodiment.

[0080] FIG. 10 is a plan view showing an example of a lid according to the third modification of the first embodiment.

[0081] FIG. 11 is a plan view showing an example of a lid according to the first modification of the second embodiment.

[0082] FIG. 12 is a plan view showing an example of a lid according to the first modification of the second embodiment.

[0083] FIG. 13 is a plan view showing an example of a lid according to the second modification of the first embodiment.

[0084] FIG. 14A is a plan view schematically showing an example of a lid according to the third embodiment. FIG. 14B is a diagram for explaining the margin portion.

[0085] FIG. 15A is a plan view showing an example of a lid according to modification example 4 of the first embodiment. FIG. 15B is a cross-sectional view schematically illustrating the state of the D-D line longitudinal section of FIG. 15A.

[0086] FIGS. 16A and 16B are cross-sectional views showing an example of a lid according to modification example 5 of the first embodiment.

[0087] FIG. 17 is a plan view schematically showing an enlarged state of the portion of area XS enclosed by a chain line in FIG. 1.

[0088] FIG. 18 is a cross-sectional view schematically showing an example of the boundary between the outer peripheral edge of the small lid portion and the opening edge of the small opening in the lid according to the first embodiment.

[0089] FIGS. 19A and 19B are plan views showing an example of a lid according to modification example 7 of the first embodiment.

[0090] FIG. 20(a) is a plan view for explaining an example of the fourth embodiment. FIG. 20(b) is a cross-sectional view schematically showing the state of the A-A line longitudinal section of FIG. 20(a).

[0091] FIG. 21(a) is a plan view for explaining an example of the fourth embodiment. FIG. 21(b) is a cross-sectional view schematically showing the state of the B-B line longitudinal section of FIG. 21(a).

[0092] FIGS. 22(a) and 22(b) are plan views for explaining an example of a modification of the fourth embodiment.

[0093] FIGS. 23(a) and 23(b) are plan views for explaining an example of a modification of the fourth embodiment.

[0094] FIGS. 24(a) and 24(b) are plan views for explaining an example of a modification of the fourth embodiment.

[0095] FIG. 25 is a plan view for explaining an example of a modification of the fourth embodiment.

[0096] FIGS. 26(a) and 26(b) are plan views for explaining a displacement facilitation structure in an example of the fourth embodiment. FIG. 26(c) is a cross-sectional view schematically showing the C-C line longitudinal section of FIG. 26(b).

[0097] FIG. 27 is a plan view for explaining an example of a modification of the fourth embodiment.

[0098] FIG. 28 is an enlarged partial cross-sectional view for explaining an example of the fourth embodiment.

[0099] FIG. 29 is a perspective view showing an example of a container with a lid attached to the container according to the fourth embodiment.

[0100] FIG. 30 is a cross-sectional view schematically showing the state of the D-D line longitudinal section of FIG. 29.

[0101] FIG. 31 is a perspective view showing an example of a container with a lid attached to the container according to the fourth embodiment.

[0102] FIG. 32 is a cross-sectional view showing an example of a container with a lid attached to the container according to the fourth embodiment.

[0103] FIG. 33(a) is a plan view for explaining an example of the fifth embodiment. FIG. 33(b) is a cross-sectional view schematically showing the state of the E-E line longitudinal section of FIG. 33(a).

[0104] FIG. 34(a) is a cross-sectional view schematically showing the state of the F-F line longitudinal section of FIG. 33(a). FIG. 34(b) is a cross-sectional view schematically showing the state of the G-G line longitudinal section of FIG. 33(a). FIG. 34(c) is a cross-sectional view schematically showing the state of the H-H line longitudinal section of FIG. 33(a).

[0105] FIG. 35 is a plan view for explaining an example of the fifth embodiment.

[0106] FIG. 36 is a plan view for explaining an example of the fifth embodiment.

[0107] FIG. 37 is a cross-sectional view for explaining an example of the fifth embodiment.

[0108] FIG. 38 is a perspective view showing an example of a container with a lid attached to the container according to the fifth embodiment.

[0109] FIG. 39 is a cross-sectional view showing an example of a container with a lid attached to the container according to the fifth embodiment.

[0110] FIG. 40 is an enlarged partial cross-section for explaining an example of the fifth embodiment.

[0111] FIG. 41(a) is a plan view for explaining an example of the sixth embodiment. FIG. 41(b) is a cross-sectional view schematically showing the state of the I-I line longitudinal section of FIG. 41(a).

[0112] FIG. 42 is a cross-sectional view showing an example of a container with a lid attached to the container according to a modification of the sixth embodiment.

[0113] FIG. 43A is a plan view for explaining an example of a lid according to the seventh embodiment. FIG. 43B is a cross-sectional view schematically showing the state of the A-A line longitudinal section of FIG. 43A.

[0114] FIG. 44 is a cross-sectional view for explaining an example of a lid attached to a container in the seventh embodiment.

[0115] FIG. 45 is a plan view for explaining an example of a lid attached to a container in the seventh embodiment.

[0116] FIG. 46A is a plan view for explaining an example of a lid according to the eighth embodiment. FIG. 46B is a cross-sectional view schematically showing the state of the B-B line longitudinal section of FIG. 46A.

[0117] FIG. 47 is a cross-sectional view for explaining an example of a lid attached to a container in the eighth embodiment.

[0118] FIG. 48 is a plan view for explaining an example of a lid attached to a container in the eighth embodiment.

[0119] FIG. 49A is a plan view for explaining an example of a lid according to modification example 1 of the seventh embodiment. FIG. 49B is a diagram schematically showing the state of the C-C line longitudinal section of FIG. 49A.

[0120] FIGS. 50A and 50B are plan views for explaining an example of a lid according to modification example 2 of the seventh embodiment.

[0121] FIG. 51A is a plan view for explaining an example of a lid according to modification example 5 of the seventh embodiment. FIG. 51B is a plan view for explaining an example of a lid according to modification example 4 of the seventh embodiment.

[0122] FIGS. 52A and 52B are plan views for explaining an example of a lid according to modification example 6 of the seventh embodiment.

[0123] FIG. 53A is a plan view for explaining an example of a lid according to modification example 1 of the eighth embodiment. FIG. 53B is a cross-sectional view schematically showing the state of the D-D line longitudinal section of FIG. 53A.

[0124] FIG. 54A is a plan view for explaining an example of a lid according to modification example 2 of the eighth embodiment. FIG. 54B is a cross-sectional view schematically showing the state of the E-E line longitudinal section of FIG. 54A.

[0125] FIG. 55A is a plan view for explaining an example of a lid according to the ninth embodiment. FIG. 55B is a cross-sectional view schematically showing the state of the F-F line longitudinal section of FIG. 55A.

[0126] FIG. 56A is a plan view showing an example of a container with a lid according to the tenth embodiment. FIG. 56B is a diagram for explaining the connection structure.

[0127] FIG. 57 shows the state of the A-A line longitudinal section of FIG. 56 and is a cross-sectional view schematically showing the cross-section of a container with a lid.

[0128] FIG. 58 is a cross-sectional view showing an example of the connecting portion.

[0129] FIG. 59 is a plan view showing an example of a container with a lid according to the eleventh embodiment.

[0130] FIG. 60 is a plan view showing an example of a container with a lid according to the twelfth embodiment.

[0131] FIG. 61 is a plan view showing an example of a container with a lid according to the thirteenth embodiment.

[0132] FIG. 62 is a plan view showing an example of a lid according to the fourteenth embodiment.

[0133] FIG. 63 is a cross-sectional view for explaining the state of a lid attached to a container in the fourteenth embodiment.

[0134] FIG. 64 is a schematic diagram showing an example of a lid according to the seventh to ninth embodiments.

[0135] FIG. 65 is a schematic diagram showing an example of a lid according to the seventh to ninth embodiments.

[0136] FIG. 66 is a schematic diagram showing an example of a lid according to the first embodiment.

[0137] FIG. 67 is a schematic diagram showing an example of a lid according to the seventh to ninth embodiments.

MODE FOR CARRYING OUT THE INVENTION

[0138] Below, the lid according to the present invention will be described in detail with reference to the drawings. It should be noted that the lid according to the present invention is described using a lid for a container (cup) for various beverages such as coffee cups as an example, but it is not limited to lids for containers for beverages, and can also be applied as a lid for containers that store food items other than beverages, such as prepared foods. Furthermore, the lid according to the present invention can be applied to containers that can store various items other than food and drink, such as parts like bolts and nuts, and other items not mentioned above. Moreover, the lid according to the present invention is described below using examples where the shape is circular when viewed in plan, but the shape of the lid is not limited to circular when viewed in plan and can be applied to various shapes other than circular, such as elliptical, rectangular, triangular, polygonal, chamfered rectangular, chamfered polygonal, etc.

[0139] Below, embodiments and application examples related to the present invention will be described sequentially with reference to the drawings. In this specification and drawings, configurations having substantially the same functional structure are denoted by the same reference numerals to omit redundant explanations. It should be noted that the embodiments, modifications, and application examples described below may be appropriately combined and applied.

[0140] The following description is a preferred specific example of the present invention, and the content of the present invention is not limited to these embodiments, etc. In the following description, for the sake of convenience, directions such as front and back, left and right, up and down, and the direction of the horizontal plane are indicated, but the content of the present invention is not limited to these directions. In the examples of FIGS. 1 to 67, the Z-axis direction is assumed to be the vertical direction (upper side is +Z direction, lower side is Z direction), the X-axis direction is the front-back direction (rear side is +X direction, front side is-X direction), and the directions along the X-axis and Y-axis, which are orthogonal to each other on a plane defined with the Z-axis direction as the normal, are the X-axis direction and Y-axis direction, and the plane spanned by the X-axis and Y-axis, the XY plane, is assumed to be the horizontal plane, and the explanation is based on these. The relative size ratios and the like shown in each of FIGS. 1 to 67 are described for convenience, and unless specifically limited, they do not limit the actual size ratios.

1 First Embodiment

1-1 Configuration

[0141] The lid 1 according to the first embodiment is formed to be joinable to a container having an opening 102 formed at the upper end and an edge 103 forming the outer periphery of the opening 102, as will be described later with reference to FIGS. 3A and 3B. FIGS. 3A and 3B are perspective and sectional views showing an example of a container 150 with a lid, in which the lid 1 shown in FIGS. 1A, 1B, and 2 is joined to the container 101. The lid 1 can be used by being joined along the edge 103. In the lid 1, the area joined to the edge 103 in a plan view of the lid 1 is referred to as the joining region R. FIG. 1A is a plan view showing an embodiment of the lid 1. FIG. 1B is a sectional view schematically showing the A-A line longitudinal section of FIG. 1A. FIG. 2 is a diagram showing an example of the region of the margin portion 10 and the region of the small opening 6, which will be described later. It should be noted that, as the container 101, one having flexibility at the edge 103 of the opening 102 is more preferably used. However, this does not prohibit the container 101 from being a container with little or no flexibility, such as a metal container.

[0142] In the examples of FIGS. 1A and 1B, the joining region R corresponds to a region formed generally annularly along the opening 102 in a shape corresponding to the opening 102 of the container 101. If the joining region R between the lid 1 and the container 101 is not continuously joined, the portion sandwiched between adjacent joining regions R and the portion facing the edge 103 are also included in the joining region corresponding portion 5.

(Material of the Lid)

[0143] The material of the lid 1 is not particularly limited, but it is preferably a paper-based material. As for paper-based materials, they include so-called paper obtained by scooping a slurry of fibrous raw materials onto a net, drying or pressing and drying, and papermaking into sheets, and so-called air-laid sheets obtained by crushing raw material sheets made of pulp-based fibers, etc., with a crusher to obtain crushed pulp and other open-fiber raw materials, which are then fibered by air flow and fixed with a binder, as well as so-called paper products made by agglutinating plant fibers and other fibers, chemical fiber paper, synthetic paper, water-resistant paper, coated paper, alternative paper, parchment, wool paper, glass fiber paper, stone paper, ceramic paper, etc., and those laminated in multiple layers. In addition, as a paper-based material, it may include fibers other than pulp, such as non-pulp-based natural fibers, synthetic fibers, and recycled fibers, but it is preferably composed of 50% or more by mass of pulp, more preferably 70% or more by mass, and even more preferably 80% or more by mass, with those composed of 100% by mass of pulp being particularly preferred. Paper-based materials can also be used in combination with synthetic resin or natural resin films, non-woven fabrics, wood-based materials such as wood foil, and materials such as aluminum foil, but when used as a composite material, it is preferable that the composite material as a whole contains 50% or more by mass of pulp, and particularly preferably 80% or more by mass of pulp. The higher the pulp content, the more easily the paper-based material is biodegraded, which is preferable.

[0144] It is preferable that the entire lid 1 is formed of the above-mentioned paper-based material. However, this does not prohibit part or all of it from being formed of a material different from the paper-based material. For example, the lid 1 may be formed of a laminate of a paper-based material and a resin film material, such as only the base portion 2A1 described later. In this case, by appropriately using sealing methods such as pressing, heat sealing, or ultrasonic welding with the film material side of the lid 1 facing the container 101, it becomes easy to join the lid 1 to the container 101. Considering these points, the lid 1 is preferably used as a laminate including a paper-based material. The small lid portion 3 may also be used as a laminate including a paper-based material.

[0145] As shown in FIGS. 1A, 1B, etc., the lid 1 has a base portion 2A1, a small lid portion 3, and a hinge portion 7.

Base Section

[0146] The base portion 2A1 is defined as a portion having a joining region corresponding portion 5 and forming a small opening 6. The base portion 2A1 can be a portion that defines the reference for the displacement of the small lid portion 3, which will be described later. In the example of FIG. 1A, in a plan view of the lid 1, the base portion 2A1 and the small lid portion 3 form the exposed surface 70 of the lid 1.

Joint Region Corresponding Section

[0147] The joining region corresponding portion 5 is a portion of the lid 1 corresponding to the joining region R (the region facing the edge 103 of the container 101 and the region joined to the container 101). In the container 150 with a lid, the joining region corresponding portion 5 is the portion of the lid 1 that forms the joint 151 between the lid 1 and the container 101. Specifically, in a plan view of the lid 1 (in the example of FIG. 1A, when the Z-axis direction (vertical direction) is the line of sight direction), the portion of the base portion 2A1 that forms the joining region R is defined as the joining region corresponding portion 5. The joining region corresponding portion 5 is usually formed annularly, as shown in FIG. 1A. Particularly, as shown in FIGS. 3A and 3B, when the edge 103 of the container 101 is formed in a generally annular shape, the joining region R becomes annular, and the joining region corresponding portion 5 also becomes generally annular in a plan view of the lid 1. The outer edge of the joining region corresponding portion 5 is defined according to the position of the outer edge of the joining region R. The outer edge of the joining region corresponding portion 5 may be located at the outer peripheral edge 2A of the base portion 2A1, or it may be located inside the outer peripheral edge 2A of the base portion 2A1, as shown in the example of FIG. 1A.

Small Opening

[0148] The small opening 6 is formed to penetrate the opposing surface 73A of the lid 1 to the container 101 and the non-opposing surface of the lid 1 to the container 101 (the exposed surface 70 of the lid 1). The small opening 6 is formed to have a smaller opening area than the opening 102 of the container 101 on the inside of the portion corresponding to the joining region corresponding portion 5 in a plan view of the lid 1. The small opening 6 is for forming an opening for the entrance and exit of the contents (such as beverages or food) in the space 105 of the container 101 when the lid 1 is joined to the container 101. The small opening 6, in combination with the small lid portion 3 described later, forms the opening forming portion 4.

Opening Formation Section

[0149] As shown in FIG. 1A, the opening forming portion 4 is defined as the portion having the small opening 6 and the small lid portion 3. In the opening forming portion 4, the small opening 6 opens and closes with the displacement of the small lid portion 3. The opening forming portion 4 is formed such that, as shown in FIG. 1A, the small lid portion 3 is in a state of closing the small opening 6, and the small lid portion 3 is displaced to open the small opening 6. When the small lid portion 3 is rotated to lift the small lid portion 3 based on the base portion 2A1, the small opening 6 is exposed and becomes an outlet. That is, the opening forming portion 4 is configured such that when the lid 1 is attached to the container 101 and the small lid portion 3 is lifted, the small opening 6 and the small lid portion 3 are combined so that the space 105 of the container 101 can be seen through the small opening 6.

[0150] In the state where the small opening 6 becomes an outlet, it can be used as a supply port for additional liquids such as beverages or solids such as ice, as will be described later. Also, when a liquid such as a beverage is present inside the container 101 (space 105), the small opening 6 may be used as a drinking or pouring spout for the beverage, etc.

Small Lid Section

[0151] The lid 1 is provided with a small lid portion 3. The small lid portion 3 is formed to be capable of covering and opening and closing the small opening 6. In the example of FIG. 1A, the small lid portion 3 is formed to be displaceable to a lifted state with respect to the base portion 2A1, as also shown in FIG. 3B, and when the small lid portion 3 is lifted, the small opening 6 is formed (opened). In the example shown in FIG. 1A, the shape of the small lid portion 3 can be defined such that the outer peripheral contour shape of the small lid portion 3 follows the shape of the opening edge 6G of the small opening 6 when the small opening 6 is closed by the small lid portion 3. In this case, it becomes easy to bring the end face of the outer peripheral edge 3A of the small lid portion 3 into contact with the end face of the opening edge 6G of the small opening 6 when the small opening 6 is closed by the small lid portion

[0152] In the lid 1 shown in the example of FIG. 1A, the small lid portion 3 is provided inside (on the center CT side) of the joining region corresponding portion 5 in a plan view of the lid 1. The small lid portion 3 is displaced (rotated) so that the small lid portion 3 is in a lifted state. The small lid portion 3 is connected to the base portion 2A1 by a hinge portion 7. As the small lid portion 3 is lifted with the hinge portion 7 as a pivot, the small opening 6 is exposed.

[0153] The shape and structure of the small lid portion 3 are not particularly limited as long as they are such that they form the margin portion 10, which will be described later. In the example of FIG. 1A, the shape of the front edge portion 75A of the outer peripheral edge 3A of the small lid portion 3 is located inside the joining region R, and the width W of the small lid portion 3 is formed to widen from the front edge portion 75A toward the base end portion 74A. The width W of the small lid portion is specified as follows. That is, as a predetermined position SB1 of the outer peripheral edge of the small lid portion, when a straight line DL passing through the position SB1 and extending in the direction of the hinge portion 7 is assumed, the intersection position of the straight line DL and the outer peripheral edge of the small lid portion (but different from the position SB1) (corresponding position SB2) is defined. Then, the distance between position SB1 and position SB2 is defined, and this distance is specified as the width W.

[0154] In the lid 1 according to the first embodiment, it is not limited to the case where the center CT of the lid 1 is located in the small lid portion 3 as shown in FIG. 1, etc., and the small lid portion 3 may be configured not to include the center CT of the lid 1 as shown in FIG. 9A.

[0155] In the lid 1, when the small lid portion 3 is lifted, the small opening 6 is exposed as described above. This state is called the open lid state. The state where the small opening 6 is covered by the small lid portion 3 is called the closed lid state.

[0156] In the lid 1, even after the lid is opened (after the small lid portion 3 is raised and the small opening 6 is exposed), it can be closed again, and when it is closed, the end face (outer peripheral end face) of the outer peripheral edge 3A of the small lid portion 3 can face the end face of the opening edge 6G of the small opening 6 of the base portion 2A1.

(Hinge Section)

[0157] As described above, the lid 1 has a hinge section 7. The hinge section 7 is generally configured as a part corresponding to the line segment connecting the two base ends 74A along the outer peripheral edge 3A of the small lid portion 3, corresponding to the boundary part between the base portion 2A1 and the small lid portion 3. The hinge section 7 serves as the rotation axis when the small lid portion 3 rotates. However, when the small lid portion 3 rotates, it is not only when the small lid portion 3 rises from the base portion 2A1 at a certain angle at the position of the hinge section 7, but also includes cases where the small lid portion 3 gradually curves and rises from the hinge section 7 toward the front edge 75A of the small lid portion 3, as shown in FIG. 3B.

[0158] The base portion 2A1 is connected to the small lid portion 3 at least at the hinge section 7. The hinge section 7 is not particularly limited in structure as long as it is defined as the boundary between the base portion 2A1 and the small lid portion 3. The hinge section 7, like the connection structure 17 described later, may be a perforated structure or a half-cut section.

(Connection Structure between Base Portion and Small Lid Portion)

[0159] In the lid 1, a structure (connection structure 17) connected at the opening edge 6G of the small opening 6 of the base portion 2A1 and the outer peripheral edge 3A of the small lid portion 3 may be formed. It is preferable that the connection structure 17 is configured as a weakened part, which is a more fragile part than the small lid portion 3. Since the connection structure 17 is a weakened part, it can be destroyed when the small lid portion 3 rotates about the hinge section 7 relative to the base portion 2A1. That is, the small lid portion 3 is raised relative to the base portion 2A1 while being generally separated along the connection structure 17.

[0160] In the example of FIG. 1, the structure of the connection structure 17 is a combination of a continuous part 18A and a cut part 18B, as shown in FIG. 17. FIG. 17 is an enlarged plan view of the area XS enclosed by the one-dot chain line in FIG. 1, schematically showing an embodiment of the connection structure 17. The combination structure is, for example, a structure (so-called perforated structure) in which the combination of the continuous part 18A and the cut part 18B alternates along the longitudinal direction where the end face of the opening edge 6G of the small opening 6 and the end face of the outer peripheral edge 3A of the small lid portion 3 face each other. Moreover, the connection structure 17 is not limited to a perforated structure and may be a half-cut section 16, as shown in FIG. 18. The half-cut section 16 is identified as a part cut halfway through in the thickness direction of the lid 1, as shown in FIG. 18. The half-cut section 16 is not limited to a part cut to half the thickness of the lid 1 in the thickness direction. The half-cut section 16 includes a structure cut more than half the thickness of the lid 1 while avoiding penetration, or a structure cut less than half the thickness of the lid 1 in the thickness direction.

[0161] In cases where the connection structure 17 has a continuous part 18A and a cut part 18B, the continuous part 18A may have a structure corresponding to the half-cut section 16.

(Eaves Section)

[0162] The lid 1 has an eaves section. The eaves section is formed as part of the base portion 2A1. The eaves section is configured as a part formed inside from the inner edge of the joint area corresponding section 5 and outside from the opening edge 6G of the small opening 6 on the plan view of the base portion 2A1. With the eaves section formed on the lid 1, when the small opening 6 is opened (open lid state), solid objects can hit the eaves section when consuming beverages, etc., through the small opening 6, preventing accidental ingestion of solids. As the eaves section in the lid 1, a margin section 10 is formed in examples such as FIG. 1. In the following explanation, the case where the eaves section is the margin section 10 will be used as an example.

(Margin Section)

[0163] The lid 1 has a margin section 10, as shown in FIGS. 1A, 1B, 2, etc. The margin section 10 is defined as a part that satisfies the following conditions 1 and 2. [0164] Condition 1: On the plan view of the base portion 2A1, the margin section 10 is a part formed inside from the inner edge of the joint area corresponding section 5 of the base portion 2A1. [0165] Condition 2: On the plan view of the base portion 2A1, when a line segment connecting the margin section 10 and the hinge section 7 is assumed, the line segment passes through the opening edge 6G of the small opening 6.

[0166] The plan view of the base portion 2A1 refers to the view when looking at the base portion 2A1 from the +Z side to the Z side along the Z-axis direction in FIGS. 1A and 1B.

[0167] Regarding condition 1, since the margin section 10 is a part formed on the base portion 2A1, it is a part separated from the small lid portion 3. Regarding condition 2, for example, as shown in FIG. 1A, when a line segment M connecting the position P1 of the margin section 10 and the position P2 of the hinge section 7 is assumed, the line segment M passes through the opening edge 6G of the small opening 6. The margin section 10, when viewed from the position of the hinge section 7, is the part outside the position of the opening edge 6G. Therefore, in the example of FIG. 2, the margin section 10 is identified as a part different from the joint area corresponding section 5 and the small lid portion 3, as the hatched part S1 in FIG. 2. The hatched part S2 corresponds to the small opening 6. In the example of FIG. 1, the part S2 also corresponds to the small lid portion 3. FIG. 2 is a plan view showing the part that becomes the margin section 10 for the lid 1 in FIG. 1.

(Area of Margin Section and Small Opening)

[0168] The size of the margin section 10 is not particularly limited, but it is preferable that the area of the margin section 10 is smaller than the area of the small opening 6 on the plan view of the base portion 2A1. That is, in the example of FIG. 2, the area of the part S1 corresponding to the margin section 10 is smaller than the area of the part S2 corresponding to the small opening 6. In this case, since the size of the small opening 6 is larger than the size of the margin section 10, it becomes easy to add liquids such as beverages or solids such as ice to the space 105 of the container 101 when the container 150 with the lid is in the state where the small opening 6 is opened (open lid state). Regarding the criteria for specifying the area of the margin section 10 and the area of the small opening 6, the area of both the margin section 10 and the small opening 6 is indicated on the plan view of the lid 1 (when the direction from +Z to Z in FIG. 2 is taken as the viewing direction). The criteria for specifying the area shown here are the same for the area of the first part described later.

(Area of Margin Section and First Part)

[0169] It is preferable that the area of the margin section 10 is larger than the area of the first part 5E of the joint area corresponding section 5. Here, the first part 5E is a part specified as follows.

[0170] When assuming a state where the base portion 2A1 is divided into two parts by an extension line ME extended outward along the hinge section 7, the part of the joint area corresponding section 5 formed in the part including the small opening 6 is defined as the first part 5E, and the part excluding the first part 5E from the joint area corresponding section 5 is defined as the second part 5F.

[0171] When the area of the margin section 10 is larger than the area of the first part 5E of the joint area corresponding section 5, it becomes easy to slightly flex the margin section 10 in the vertical direction relative to the first part 5E. When the small opening 6 is opened (open lid state), if a solid object hits the margin section while consuming beverages, etc., through the small opening 6, the margin section becomes easier to flex, making it easier to buffer the force applied from the solid object to the margin section.

(Shape of Margin Section)

[0172] The shape of the margin section 10 is determined according to the shapes of the small opening 6 and the joint area corresponding section 5, but it is preferable that the inner edge 10C and the outer edge 10D of the margin section 10 are formed to be non-concentric. Here, non-concentric means that at least one of the contour shape of the inner edge 10C and the contour shape of the outer edge 10D of the margin section 10 deviates from the arc shape centered on the center CT of the lid 1. In the example of FIG. 2, the contour shape of the inner edge 10C of the margin section 10 is formed to be non-arc-shaped, deviating from the arc shape centered on the center CT of the lid 1. However, this does not prohibit the contour shape of the inner edge 10C and the contour shape of the outer edge 10D of the margin section 10 from being arc-shaped centered on the center CT of the lid 1, as shown in the examples of FIGS. 9A and 9B. The examples of FIGS. 9A and 9B are plan views showing another embodiment of the lid 1 of the first embodiment.

(Extension Section)

[0173] In the lid 1 according to the first embodiment, an extension section 7C may be formed on the outer peripheral edge 2A of the base portion 2A1. In the examples of FIGS. 1A and 1B, the position of the extension section 7C is defined on the outer peripheral edge 2A of the base portion 2A1 so that the hinge section 7 is positioned between the front edge 75A forming the tip of the small lid portion 3 and the extension section 7C in the closed state. The shape of the extension section 7C is not particularly limited, but in the example of FIG. 1A, the shape of the extension section 7C is defined so that the outer peripheral edge 7D of the extension section 7C becomes a gently curved convex shape.

[0174] When the extension section 7C is formed, marks or characters indicating the container 101 corresponding to the lid 1 can be arranged on the extension section 7C. For example, characters such as S, M, L, etc., can be printed or otherwise arranged on the extension section 7C. When the size of the container 101 is small, a lid 1 with the letter S printed on it is used; when the size of the container 101 is medium, a lid 1 with the letter M printed on it is used; and when the size of the container 101 is large, a lid 1 with the letter L printed on it is used, thus associating the types of container 101 and lid 1. This prevents the risk of joining the container 101 and lid 1 in incorrect size combinations when attaching the lid 1 to the container 101.

[0175] Additionally, if an extension 7C is formed on the lid 1, the extension 7C can be used as a handle. As shown in the example in FIG. 1, the extension 7C is defined on the outer peripheral edge 2A of the base part 2A1 so that the hinge part 7 is positioned between the front edge 75A forming the tip of the small lid part 3 and the extension 7C, allowing the position of the front edge 75A of the small lid part 3 and the position of the extension 7C to be as far apart as possible. By keeping the position of the front edge 75A of the small lid part 3 and the position of the extension 7C as far apart as possible, it is possible to prevent the person carrying the lid 1 by pinching the extension 7C from inadvertently touching the small lid part 3 of the lid 1, thereby reducing the risk of contamination of the small lid part 3 by human contact.

1-2 Operation and Effect

[0176] In conventional containers with lids joined to the edge of the container, when the lid is removed from the edge, there was a possibility of consuming the beverage from the edge of the container while solid objects like ice and the beverage were contained in the container. Therefore, when consuming the beverage, there was a risk that solid objects like ice could flow out together from the edge of the container, leading to accidental ingestion by the consumer.

[0177] In the lid 1 according to the first embodiment, a margin part 10 is provided. Therefore, when consuming a beverage by placing the mouth on the container 150 with a lid, even if solid objects like ice try to flow out together from the space part 105 of the container 101, the liquid flows out from the small opening, but the solid objects like ice are easily restricted by the margin part 10, reducing the risk of accidental ingestion by the consumer.

[0178] Additionally, in the lid 1 according to the first embodiment, the small opening 6 has a larger area than the margin part 10, allowing additional pouring of beverages, etc., through the small opening 6. Furthermore, after additional pouring of beverages, etc., it is possible to reclose the small opening 6 with the small lid part 3 by obtaining the same effect as the lids according to the seventh to ninth embodiments of the present invention described below. Moreover, even when reclosed in this manner, it is still possible to ensure sealing performance similar to the lid according to the embodiments described later.

[0179] Further explanation will be continued regarding the modified example of the first embodiment.

1-3 Modified Example

Modified Example 1

[0180] In the lid 1 according to the first embodiment, as shown in FIG. 4, a protruding part 3F may be formed on the outer peripheral edge 3A of the small lid part 3. In this case, a concave-shaped part corresponding to the protruding part 3F is formed on the opening edge 6G of the small opening 6. A lid 1 having such a configuration is referred to as Modified Example 1 of the first embodiment. FIG. 4 is a schematic plan view showing an example of the lid 1 according to Modified Example 1 of the first embodiment.

(Protruding Part)

[0181] In the example of FIG. 4, the protruding part 3F is a portion that extends convexly in the direction toward the outside of the small lid part 3 at the front edge 75A. The protruding part 3F can be identified as a portion having a contour shape that protrudes outward compared to the surrounding outer peripheral edge 3A in the plan view of the small lid part 3. Then, a concave-shaped part 3K corresponding to the protruding part 3F is formed on the opening edge 6G of the small opening 6. In the example of FIG. 4, the concave-shaped part 3K is formed to fit with the protruding part 3F. This makes it easier for the base end of the protruding part 3F to be locked at the opening edge 6G of the small opening 6 when reclosing the small opening 6 with the small lid part 3, thereby stabilizing the reclosed state of the small opening 6 with the small lid part 3.

Modified Example 2

[0182] In the lid 1 according to the first embodiment, as shown in FIG. 13, a recessed part 3I may be formed on the outer peripheral edge 3A of the small lid part 3. In this case, a convex-shaped part 3J corresponding to the recessed part 3I is formed on the opening edge 6G of the small opening 6. A lid 1 having such a configuration is referred to as Modified Example 2 of the first embodiment. FIG. 13 is a schematic plan view showing an example of the lid 1 according to Modified Example 2 of the first embodiment.

(Recessed Part)

[0183] The recessed part 3I is a portion shaped by gouging the small lid part 3 inward at a predetermined position from the front edge 75A toward the base end 74A of the small lid part 3. In the example of FIG. 13, the recessed part 3I is a portion shaped by gouging the small lid part 3 in a U-shape inward at a predetermined position from the front edge 75A toward the base end 74A of the small lid part 3 at each of the two side edges 76.

(Convex Part)

[0184] A convex-shaped part 3J corresponding to the recessed part 3I is formed on the opening edge 6G of the small opening 6. The convex-shaped part 3J is formed to fit with the recessed part 3I, and in the example of FIG. 13, it is formed in a tongue-like shape. This makes it easier for the recessed part 3I to be locked at the convex-shaped part 3J or its vicinity on the opening edge 6G of the small opening 6 when reclosing the small opening 6 with the small lid part 3, thereby stabilizing the reclosed state of the small opening 6 with the small lid part 3.

Modified Example 3

[0185] In the lid 1 according to the first embodiment, as shown in FIG. 10, a notch 8 may be provided in the base part 2A1. A lid 1 having such a configuration is referred to as Modified Example 3 of the first embodiment. FIG. 10 is a schematic plan view showing an example of the lid 1 according to Modified Example 3 of the first embodiment.

(Notch)

[0186] In Modified Example 3 of the first embodiment, the notch 8 is formed in a cross shape. The notch 8 can be formed by penetrating the member constituting the base part of the lid in the vertical direction. In Modified Example 3 of the first embodiment, the notch 8 is formed so that it can be used as an insertion port for a straw or the like. Additionally, as described later, if a claw part 23B is provided to hold the small opening 6 open with the small lid part 3, the notch 8 can be used as a through-hole for inserting the claw part 23B. In this case, the notch 8 also serves as part of the holding structure forming part 30 described later, meaning that the claw part 23B and the notch 8 constitute the holding structure forming part 30. The shape of the notch 8 is not limited to a cross shape as long as it can be used as an insertion port for a straw or the like, and various shapes such as a C-shape or tongue-like shape may be used.

Modified Example 4

[0187] In the lid 1 according to the first embodiment, as shown in FIGS. 15A and 15B, a recessed part 2B may be formed on the inner part of the joint area corresponding part 5. A lid 1 having such a configuration is referred to as Modified Example 4 of the first embodiment. FIG. 15A is a schematic plan view showing an example of the lid 1 according to Modified Example 4 of the first embodiment. FIG. 15B is a schematic cross-sectional view showing the state of the D-D line longitudinal section of FIG. 15A.

(Recessed Part)

[0188] The recessed part 2B can be formed by embossing the member (sometimes referred to as a blank material) used to form the lid 1. The range in which the recessed part 2B is formed is not particularly limited as long as it is on the inner part of the joint area corresponding part 5, but it is preferable that it includes the small lid part 3. By having the part including the small lid part 3 as the recessed part 2B, even if a liquid such as a beverage spills on the exposed surface 70 side of the lid 1, it becomes easy to guide the liquid to the recessed part 2B, thereby preventing the liquid from spilling outside the lid 1.

Modified Example 5

[0189] In the lid 1 according to the first embodiment, as shown in FIG. 16A, the margin part 10 may have an inclined part 19 that inclines diagonally downward or upward from the outer edge 10D of the margin part 10 toward the inner edge 10C of the margin part 10. A lid 1 having such a configuration is referred to as Modified Example 5 of the first embodiment. FIG. 16A is a schematic cross-sectional view showing an example of the lid 1 according to Modified Example 5 of the first embodiment. FIG. 16A corresponds to a figure showing a cross-section at the same position as the cross-section corresponding to FIG. 15B. This is also the case for FIG. 16B.

(Inclined Part)

[0190] The inclined part 19 may be formed on the entire margin part 10 or on a part of it. Regarding the inclination state of the inclined part 19, it is preferable that the inclination state of the inclined part 19 can vary at the contact part between the small lid part 3 and the inner edge 10C of the margin part 10 (opening edge 6G of the small opening 6) when forming the open state by lifting the small lid part 3 from the closed state of the lid 1. For example, as the small lid part 3 is lifted, the margin part 10 is also slightly lifted upward (+Z direction), and the inclined part 19 may be formed on the margin part 10 so that the inclination state of the inclined part 19 changes from a state inclined diagonally downward to a state inclined diagonally upward or a horizontal state. This can be realized by the small lid part 3 and the small opening 6 coming into contact so that there is a frictional force between the outer peripheral edge 3 A of the small lid part 3 and the inner edge 10C of the margin part 10 (opening edge 6G of the small opening 6) in the closed state.

[0191] In Modified Example 5 of the first embodiment, the formation of the inclined part 19 makes it easier for the inner edge 10C of the margin part 10 to flex in the vertical direction (Z-axis direction) around the outer edge 10D of the margin part 10. Therefore, according to the fourth modification of the first embodiment, in the case where the container with a lid 150 is in a state where the space of the container is filled with beverages or solids and the small opening is opened (open lid state), when a solid hits the margin part while consuming a beverage, etc., using the small opening as a drinking mouth, the margin part becomes more flexible in the vertical direction, making it easier to buffer the force applied from the solid to the margin part.

Other Examples of the Inclined Section

[0192] The inclined section 19 may be formed not only on the margin part 10 but also on the entire inside of the joint area corresponding part 5 as shown in FIG. 16B. FIG. 16B is a schematic cross-sectional view showing another embodiment of the lid 1 according to the fifth modification of the first embodiment. In this case, the inclined section 19 forms a sloped surface that inclines from the inner edge of the joint area corresponding part 5 towards the inside of the lid 1.

Modification 6

[0193] In the lid 1 according to the first embodiment, as shown in FIG. 1, etc., the small lid part 3 is not limited to the case where the width W gradually increases from the front edge 75A towards the hinge part 7, but as shown in FIG. 9B, the width W of the small lid part 3 may gradually increase to a predetermined position from the front edge 75A towards the hinge part 7, and then gradually decrease from that predetermined position towards the hinge part 7. A lid 1 having such a configuration is referred to as the sixth modification of the first embodiment. FIG. 9B is a schematic plan view showing an embodiment of the lid 1 according to the sixth modification of the first embodiment. In the example of FIG. 9B, the inner edge 10C and the outer edge 10D of the margin part 10 are formed to be concentric.

Modification 7

[0194] In the lid 1 according to the first embodiment, as shown in FIGS. 19A and 19B, a stress adjustment part 27 may be formed at the base end 74A of the small lid part 3. A lid 1 having such a configuration is referred to as the seventh modification of the first embodiment. FIGS. 19A and 19B are schematic plan views showing an embodiment of the lid 1 according to the seventh modification of the first embodiment. In the example of FIG. 19A, the stress adjustment part 27 is a U-shaped curved portion outward at the base end 74A of the small lid part 3. In the example of FIG. 19B, the stress adjustment part 27 is a generally circular through-hole portion formed at the base end 74A of the small lid part 3. By providing the stress adjustment part 27, it is possible to suppress the concentration of stress at a single point on the base end 74A of the small lid part 3 when rotating the small lid part 3 around the hinge part 7, thereby reducing the risk of the lid 1 tearing from the base end 74A towards the base part 2A1 and the rotation of the small lid part 3 around the hinge part 7 becoming insufficient. If the stress adjustment part 27 is formed, it is assumed that the base end 74A of the small lid part 3 includes the stress adjustment part 27. Therefore, as shown in FIGS. 19A and 19B, the hinge part 7 is formed at a position corresponding to a straight line connecting the ends of the stress adjustment part 27. Therefore, the small lid part 3 and the margin part 10 can be defined as the hatched portions in FIGS. 19A and 19B, respectively.

2 Second Embodiment

2-1 Configuration

[0195] The lid 1 according to the second embodiment, as shown in FIG. 5, etc., has a knob part 24 provided on the small lid part 3 in the first embodiment. A lid 1 having such a configuration is referred to as the second embodiment. FIG. 5 is a schematic plan view showing an embodiment of the lid 1 according to the second embodiment.

[0196] The lid 1 according to the second embodiment is similar to the first embodiment except for the configuration where the knob part 24 is provided on the small lid part 3, so the description of other configurations (base part 2A1, hinge part 7, margin part 10, etc.) excluding the configuration where the knob part 24 is provided on the small lid part 3 is omitted.

(Knob Part)

[0197] In the example of the second embodiment shown in FIG. 5, the knob part 24 is provided on the upper surface side, which is the exposed surface of the small lid part 3 (exposed surface 70 of the lid 1), in a state where the small opening 6 is closed by the small lid part 3. The structure of the knob part 24 is not particularly limited as long as it can rotate the small lid part 3 around the hinge part 7, but in the example of FIG. 5, a tab member 31 is provided as the knob part 24.

(Tab Member)

[0198] In the example of FIG. 5, in a state where the small opening 6 is closed by the small lid part 3, the tab member 31 is joined to the small lid part 3 at one end 31A of the tab member 31, and the other end 31B of the tab member 31 is a free end. The portion of the tab member 31 joined to the small lid part 3 is called the tab joint part 18. Excluding the tab joint part 18, the free end side portion (the other end 31B side portion) of the tab member 31 is not particularly limited in shape or structure as long as it is formed in a size and shape that allows a person to grasp the tab member 31 by hand. The material of the tab member 31 may be the same as the material of the lid 1 described in the first embodiment and may be made of paper-based material.

[0199] In the lid 1, the attachment position and direction of the tab member 31 on the small lid part 3 are not particularly limited, but in the example of FIG. 5, the tab member 31 is joined to the small lid part 3 at a position closer to the tip (i.e., near the front edge 75A).

[0200] Various methods such as ultrasonic bonding, heat sealing, and adhesive bonding can be exemplified as methods for joining the tab member 31 to the small lid part 3 (i.e., forming the tab joint part 18). As a method for forming the tab joint part 18, ultrasonic bonding is preferred from the viewpoint of ease of bonding and bonding strength among the methods mentioned above. The formation position of the tab joint part 18 on the small lid part 3 is preferably at a position offset from the center of the small lid part 3 from the viewpoint of facilitating the lifting of the small lid part 3 (rotating the small lid part 3) by lifting the tab member 31.

(Orientation of the Tab Member (Attachment Direction))

[0201] In the lid 1, in the example of FIG. 5, the other end 31B side (free end side) of the tab member 31 is arranged to be proximal to the hinge part 7 side compared to one end 31A of the tab member 31. However, this is just one example, and the orientation of the tab member 31 may be in a direction other than the one shown in the example of FIG. 5. For example, the tab member 31 may be arranged such that the other end 31B side of the tab member 31 is positioned further from the hinge part 7 than one end 31A.

2-2 Operation and Effect

[0202] According to the lid 1 of the second embodiment, the same effects as the first embodiment can be obtained. In addition, in the lid 1 according to the second embodiment, the provision of the knob part 24 allows the small lid part 3 to be easily lifted.

[0203] Further explanation of the modifications of the second embodiment will continue.

2-3 Modifications

Modification 1

[0204] In the lid 1 according to the second embodiment, when the tab member 31 is provided as the knob part 24, as shown in FIG. 11, in a state where the small lid part 3 closes the small opening 6, a part of the tab member 31 may intersect the opening edge 6G of the small opening 6 in a plan view of the base part 2A1. A lid 1 having such a configuration is referred to as the first modification of the second embodiment. FIG. 11 is a schematic plan view showing an embodiment of the lid 1 according to the first modification of the second embodiment.

[0205] In FIG. 11, the edge on one end (end 31A) side of the tab member 31 intersects the opening edge 6G of the small opening 6, and the portion of the tab member 31 overlapping the upper surface of the base part 2A1 is referred to as the overlap part 35. When the overlap part 35 is formed, after opening the small opening 6 with the small lid part 3, when closing the small opening 6 again with the small lid part 3, by pushing the overlap part 35 downward (Z direction) into the small opening 6, a state is formed where the overlap part 35 is caught on the opening edge 6G of the small opening 6 on the lower side than the small opening 6. This allows the state where the small opening 6 is re-closed by the small lid part 3 to be more stabilized.

[0206] From the viewpoint of making it easier for the overlap part 35 to exhibit the function of stabilizing the state where the small opening 6 is re-closed by the small lid part 3 as described above, it is preferable that the small lid part 3 is formed with an overhang part 3F as explained in the first modification of the first embodiment. In this case, as shown in FIG. 12, when the small lid part 3 is formed with the overhang part 3F, it is preferable that a portion on one end (end 31A) side of the tab member 31 extends outward from the overhang part 3F, and the extended portion becomes the overlap part 35. FIG. 12 is a schematic plan view showing an embodiment of the lid 1 according to the first modification of the second embodiment. In the case of the lid 1 shown in the example of FIG. 12, it is possible to form a state where the overlap part 35 of the tab member 31 is more securely caught on the lower side (opposite surface 73A side) of the opening edge 6G of the small opening 6, and the state where the small opening 6 is re-closed by the small lid part 3 can be more stabilized.

Modification 2

[0207] In the lid 1 according to the second embodiment, as shown in the example of FIG. 6, it may have a holding structure forming part 30, which is a part that forms a holding structure to hold the small lid part 3 in a state where the small opening 6 is opened by rotating the small lid part 3 relative to the base part 2A1 around the hinge part 7. A lid 1 having such a configuration is referred to as the second modification of the second embodiment. FIG. 6 is a schematic plan view showing an embodiment of the lid 1 according to the second modification of the second embodiment.

(Holding Structure Forming Part)

[0208] The configuration of the holding structure forming part 30 is not particularly limited. For example, in the example of the lid 1 shown in FIG. 6, the claw part 23B and the receiving part 33 form the holding structure forming part 30.

(Claw Part)

[0209] The claw part 23B may be any part that has a structure capable of being locked by hooking or inserting into the receiving part 33, which will be described later, as shown in the example of FIG. 6. In the example of FIG. 6, the claw part 23B is provided on the tab member 31 as an example of the knob part 24. In this example, the claw portion 23B is formed by a cut-out portion shaped in a generally mountain-like contour at a predetermined position of the tab member 31.

(Receiving Section)

[0210] The receiving section 33 is formed in a shape that allows the claw portion 23B to be engaged or inserted. In the example of FIG. 6, the receiving section 33 is a slit formed by a cut at a predetermined position of the base section 2A1. The receiving section 33 is formed at a position where it can face the claw portion 23B when the tab member 31 is displaced to rotate the small lid section 3.

(Formation of Retaining Structure)

[0211] When raising the small lid section 3 in the lid body 1, the knob section is lifted. At this time, by lifting the tab member 31 and bending a predetermined portion of the free end side (the other end 31B side) of the tab member 31, the claw portion 23B takes on a shape protruding downward or upward. Then, the tab member 31 is displaced to rotate the small lid section 3 until the claw portion 23B of the small lid section 3 reaches a position facing or near the receiving section 33. Then, the claw portion 23B of the tab member 31 is hooked or inserted into the receiving section 33. This forms a retaining structure that holds the small lid section 3 in a state where the small opening 6 is exposed.

[0212] In the above description, the case where the retaining structure forming section 30 has a slit section as the receiving section 33 was explained, but the structure corresponding to the receiving section 33 is not limited to the slit section.

Other Examples of Retaining Structure Forming Section

[0213] If the base section 2A1 of the lid body 1 is provided with an extension section 7C, as shown in FIG. 7, the extension section 7C may also serve as the receiving section. FIG. 7 is a schematic plan view showing an example of the lid body 1 according to the second embodiment (another example of the retaining structure forming section).

[0214] The lid body 1 shown in FIG. 7 has the claw portion 23B formed on the knob section 24 (tab member 31 in FIG. 7) as in the example of FIG. 6, and the claw portion 23B and the extension section 7C form the retaining structure forming section 30. In the example of FIG. 7, the extension section 7C is formed so that the outer peripheral edge 7D of the extension section 7C can face the claw portion 23B when the tab member 31 is displaced to rotate the small lid section 3.

(Formation of Retaining Structure)

[0215] In the lid body 1 shown in the example of FIG. 7, as in the example of FIG. 6, when raising the small lid section 3, the tab member 31 is lifted in the direction of arrow F in FIG. 8A. FIG. 8A is a cross-sectional view schematically showing the state of the C-C line longitudinal section of FIG. 7. In the example of FIG. 7, as in the example of FIG. 6, by lifting the tab member 31 and bending a predetermined portion of the free end side (the other end 31B side) of the tab member 31, the claw portion takes on a shape protruding downward or upward. Then, the tab member 31 is displaced to rotate the small lid section 3 until the claw portion 23B of the small lid section 3 reaches a position facing or near the outer peripheral edge 7D of the extension section 7C. Then, as shown in FIG. 8B, the claw portion 23B of the small lid section 3 is hooked or inserted into the extension section 7C. This forms a retaining structure that holds the small lid section 3 in a state where the small opening 6 serves as the outlet of the space section 105. FIG. 8B is a cross-sectional view for explaining an example of the retaining structure.

[0216] As shown in FIG. 66, instead of the tab member 31, a protruding piece may be formed from the small lid section 3 to form the knob section, and the small lid section 3 may be opened and closed by operating this knob section 24.

3 Third Embodiment

[0217] The lid body 1 according to the third embodiment may be provided with multiple margin sections, as shown in FIGS. 14A and 14B. A lid body 1 having such a configuration is referred to as the third embodiment. FIG. 14A is a schematic plan view showing an example of the lid body 1 according to the third embodiment. FIG. 14B is a diagram for explaining the margin section 10. In the lid body 1 according to the third embodiment, the small lid section 3, the base section 2A1, and the hinge section 7 are also provided, similar to the first embodiment. The lid body 1 according to the third embodiment is similar to the first embodiment except for the fact that multiple margin sections 10 are formed and the formation parts (positions) of the small lid section 3 and the small opening 6 are different, so the explanation of these other points is omitted.

(Formation Parts of Small Lid Section 3 and Small Opening)

[0218] In the third embodiment, the front edge 75A of the small lid section 3 is formed at a position overlapping the joint region corresponding section 5. Also, since the opening edge 6G of the small opening 6 corresponds to the outer peripheral edge 3A of the small lid section 3, a part of the small opening 6 overlaps with the joint region corresponding section 5, similar to the small lid section. Therefore, in the example of the third embodiment shown in FIG. 14A, in the open state (where the small lid section 3 is rotated around the hinge section 7 to expose the small opening), an opening section (serving as the outlet) is formed that exposes the space section 105 of the container 101 with a part of the edge section 103 and the small opening.

(Margin Section)

[0219] The margin section 10 is defined similarly to the first embodiment. Therefore, in the example of FIG. 14, the margin section 10 is formed as the first margin section 10A and the second margin section 10B.

(Area of First and Second Margin Sections and Area of Small Opening)

[0220] The sizes of the first margin section 10A and the second margin section 10B are not particularly limited, but it is preferable that the total area of the first margin section 10A and the second margin section 10B is smaller than the area of the small opening 6 (which also corresponds to the area of the small lid section 3 in the example of FIG. 14A) in a plan view of the base section 2A1. That is, in the example of FIG. 14B, it is preferable that the total area of the portion S11 corresponding to the first margin section 10A and the portion S12 corresponding to the second margin section 10B is smaller than the area of the portion S2 corresponding to the small opening 6 (the area of the small lid section 3). In this case, since the size of the small opening 6 (the area of portion S1) is larger than the size of the margin section 10 (the total area of portions S11 and S12), it becomes easy to add liquids such as beverages or solids such as ice to the space section 105 of the container 101 when the container with lid 150 is in a state where the small opening 6 is open (open state).

4 Application Example

[0221] The lid body 1 according to the first embodiment can be used for the container with lid 150 as shown in FIGS. 3A and 3B. FIG. 3A is a perspective view showing an example in which the lid body 1 according to the first embodiment is joined to the edge section 103 forming the outer periphery of the opening 102 of the container 101 having the opening 102 formed at the upper end. FIG. 3B is a cross-sectional view schematically showing the state of the B-B line longitudinal section of FIG. 3A. The explanation of the container with lid 150 continues using FIGS. 3A and 3B.

(Container with Lid)

[0222] The container with lid 150 has a joint section 151 where the container 101 and the lid body 1 are joined, and the area of the lid body 1 forming the joint section 151 becomes the joint region R. The method of joining the lid body 1 and the container 101 is not particularly limited and can be appropriately used with joining methods such as crimping or heat sealing. Below, the case where the lid body 1 according to the first embodiment is used for the container with lid 150 is explained as an example.

[0223] In the example shown in FIGS. 3A and 3B, the container 101 has a cylindrical side wall 104 and a bottom section 106 that widen upward (taper downward) and a container body 110 forming a space section 105 inside, and an opening 102 opened at the upper end of the container body 110 (upper end of the side wall 104). Not shown, but the opening 102 of the container 101 is formed in a circular shape. However, the container 101 shown here is an example and does not limit the configuration of the container 101. For example, the container 101 may have the opening 102 formed in a rectangular shape. The container 101 may be any that can cover the opening 102 with the lid body 1. Also, what is stored inside the container 101 (space section 105) is not particularly limited and can include, for example, liquids, solids, or combinations thereof.

[0224] In the container shown in FIG. 3, the edge section 103 of the opening 102 has a flange section. The flange section may be a curl section 109 where the member forming the container body 110 is wound outward, as shown in FIG. 3, or it may be formed as a part extending outward on a plane (flange section).

[0225] Also, the lid body 1 according to the first embodiment may be combined with the container 101 having the opening 102.

[0226] The points shown in [4 Application Example] above are not limited to the case of using the lid body 1 according to the first embodiment. The second and third embodiments can also be used for the container with lid 150 joined to the container 101 in the same manner as the lid body 1 according to the first embodiment (not shown).

[0227] Next, the fourth to sixth embodiments of the lid body according to the present invention will be described.

1 Fourth Embodiment

1-1 Configuration

(Lid Body)

[0228] The lid body 1 according to the fourth embodiment is used by being joined along the edge section 103 of the opening 102 of the container 101. The lid body 1 is formed in a shape that can form a state where it is attached to the edge section 103 (a state joined to the edge section 103) to cover the opening 102 when joined to the opening 102 of the container 101. As shown in FIG. 20, the lid body 1 has a joint region R joined to the edge section 103 of the opening 102 of the container 101. FIG. 20 is a diagram showing an example of the lid body 1. As for the container 101, those having flexibility at the edge section 103 are more preferably used. However, these points do not prohibit the container 101 from being a container with little or almost no flexibility, such as a metal container.

[0229] The lid body 1 includes a main body 2, as shown in FIGS. 20(a), 20(b), etc. In the lid body 1, the main body 2 includes the joint region R. FIGS. 20(a) and 20(b) are a plan view and a cross-sectional view, respectively, showing another embodiment of the lid 1.

(Joining Region)

[0230] The joining region R indicates the part that forms the area where the lid 1 is joined to the edge 103 when the lid 1 is attached to the edge 103 over the opening 102 of the container 101. In the example of FIG. 20, the joining region R corresponds to an area that is generally annularly formed along the opening 102 in a shape corresponding to the opening 102 of the container 101 in a plan view of the lid 1. The width W of the joining region R (width along the inner and outer directions) is usually the same as or narrower than the width of the edge 103 of the opening 102. However, this does not prohibit the width W of the joining region R from being wider than the width of the edge 103 of the opening 102. Additionally, the joining region R may be formed inside the outer peripheral edge 2A of the main body 2 or up to the outer peripheral edge 2A of the main body 2. The inside of the joining region R indicates the part that forms the inside of the portion forming the joining region R in a plan view of the lid 1. The inside of the joining region R may be referred to as the inner region Rn. The top of the joining region R indicates the upper surface side (exposed surface 70 side) of the portion corresponding to the joining region R of the lid 1 in a plan view.

(Main Body)

[0231] The main body 2 covers the opening 102 and the edge 103 when the lid 1 is attached over the opening 102 of the container 101. The main body 2 includes a displacement facilitation structure 5B.

(Displacement Facilitation Structure)

[0232] In the main body 2, the displacement facilitation structure 5B is a structural part configured to allow a part of the main body 2 to displace relative to another part of the main body 2 from the edge portion defined at the outer peripheral edge 2A of the main body 2 towards the inside of the main body 2. In this specification, the aforementioned edge portion is referred to as the first edge (indicated by reference numeral 71A in FIG. 20(a), etc.), and the portion of the outer peripheral edge 2A excluding the first edge 71A is referred to as the second edge 71B. Additionally, the part of the main body 2 that can displace relative to the second portion 3D (the aforementioned part of the main body 2) is defined as the first portion 3B, and the other part of the main body 2 (excluding the first portion) is defined as the second portion 3D. The displacement facilitation structure 5B includes a guide part 6A.

(Guide Part)

[0233] The guide part 6A has a portion extending from the first end 71A1 and the second end 71A2, which are both ends of the edge portion (first edge 71A), towards the inside of the main body 2. The guide part 6A delineates at least part of the boundary K1 between the first portion 3B and the second portion 3D. In the example of FIG. 20(a), the guide part 6A is formed as the first guide part 6B and the second guide part 6C. In this example, the first guide part 6B extends from the first end 71A1 towards the inside of the main body 2, forming the boundary K1 between the first portion 3B and the second portion 3D. The second guide part 6C extends from the second end 71A2 towards the inside of the main body 2, forming the boundary K1 between the first portion 3B and the second portion 3D. If the first guide part 6B and the second guide part 6C are not distinguished, they are collectively referred to as the guide part 6A.

[0234] The guide part 6A traverses the joining region R. In the example of FIG. 20(a), the guide part 6A is formed linearly. The guide part 6A is defined as the part where a separation structure between the first portion 3B and the second portion 3D is formed along the boundary K1 when displacing the first portion 3B relative to the second portion 3D. When displacing the first portion 3B from the unused state of the container 101 with the attached lid 1, separation from the container 101 and the lid 1 occurs, resulting in strong forces being applied at the boundary between the first portion 3B and the second portion 3D in the joining region R and its vicinity, making internal breakage of the lid 1 likely. Internal breakage refers to delamination within the material (such as paper-based material) forming the lid 1 itself or unintended breakage (breakage other than at the boundary K1). By forming the displacement facilitation structure 5B with such a guide part 6A in the lid 1, the risk of internal breakage at the boundary between the first portion 3B and the second portion 3D in the joining region R and its vicinity can be suppressed, enabling smooth displacement of the first portion 3B.

[0235] The structure of the guide part 6A is not particularly limited, but in the example of FIG. 20(a), it is a notch structure as described above. However, this does not restrict the guide part 6A from having a structure other than a notch structure. For example, the guide part 6A may have a weakening structure.

[0236] In this specification, the notch structure indicates a slit-like through structure that penetrates entirely from the non-opposing surface (exposed surface 70) side to the opposing surface (back surface) when the lid 1 is attached to the container 101. A weakening structure indicates a structural part that can reduce the force required for displacement compared to parts not endowed with such a structure, such as a perforation structure or a half-cut structure. The perforation structure, as shown in FIG. 26(a), indicates a structure where cutting parts 18B penetrating from the exposed surface 70 to the back surface and continuous parts 18A avoiding cuts are alternately formed. The half-cut structure, as shown in FIG. 26(c), indicates a structure (partial notch structure) where partially notched parts 32 are formed while avoiding penetration in the thickness direction of the material forming the main body 2. The depth of the notch in the half-cut structure is not particularly limited concerning the material constituting the main body 2. FIG. 26(a) is a plan view showing an example where the guide part 6A has a perforation structure, and FIG. 26(b) is a plan view showing an example where the guide part 6A has a half-cut structure.

[0237] In the example of FIG. 20(a), the first guide part 6B has a first outer guide part 8A formed from the first end 71A1 to the inner edge RA of the joining region R, and a first inner guide part 9A excluding the first outer guide part 8A. Additionally, the second guide part 6C has a second outer guide part 8B formed from the second end 71A2 to the inner edge RA of the joining region R, and a second inner guide part 9B excluding the second outer guide part 8B.

[0238] In the guide part 6A, the structure may differ between the first outer guide part 8A and the first inner guide part 9A. For example, a half-cut structure may be formed in the first outer guide part 8A, and a notch structure may be formed in the first inner guide part 9A. This is also the case for the second outer guide part 8B and the second inner guide part 9B.

[0239] In the displacement facilitation structure 5B, the first guide part 6B and the second guide part 6C extend towards each other towards the inside of the main body 2. This is one example, and as shown in the first modification of the fourth embodiment described later, the first guide part 6B and the second guide part 6C may be formed along the inner edge RA of the joining region R for at least one of them. However, from the viewpoint of making the shape of the first portion 3B taper from the first edge 71A towards the inside of the main body 2, as described later, it is preferable that the first guide part 6B and the second guide part 6C extend towards each other from the first end 71A1 and the second end 71A2, respectively, towards the inside of the main body 2.

[0240] Additionally, for the first guide part 6B and the second guide part 6C, the length of the part of the first guide part 6B overlapping the joining region R (first overlapping part) and the length of the part of the second guide part 6C overlapping the joining region R (second overlapping part) may differ.

[0241] In such cases, the length of the adhesive part in the first overlapping part and the length of the adhesive part in the second overlapping part can be made different. In this case, when displacing the first portion, the displacement of the first portion is performed while eliminating the adhesion between the container 101 and the lid 1 (while peeling) in the first outer guide part 8A and the second outer guide part 8B, so the user displaces the first portion using a relatively large force. In the first inner guide part 9A and the second inner guide part 9B, the force to eliminate the adhesion between the container 101 and the lid 1 is unnecessary, so the user can displace the first portion using a relatively small force. Therefore, the force applied to the lid changes suddenly at the timing of transitioning from the first outer guide part 8A to the first inner guide part 9A and from the second outer guide part 8B to the second inner guide part 9B. At this time, if the user continues to apply force in the first inner guide part 9A or the second inner guide part 9B, an excessive load is applied to the lid. Therefore, by varying the length of the adhesive part in the first overlapping part and the length of the adhesive part in the second overlapping part, it becomes easier to shift the timing of transitioning from the first outer guide part 8A to the first inner guide part 9A and from the second outer guide part 8B to the second inner guide part 9B, making it less likely for an excessive load to be applied to the lid.

(Hinge Part)

[0242] As shown in the examples of FIGS. 20(a) and 20(b), it is preferable for the displacement facilitation structure 5B to have a hinge part 7. The hinge part 7 is connected to the inner end of the guide part 6A. In the examples of FIGS. 20(a) and 20(b), the end of the hinge part 7 is connected to the inner end of each of the first guide part 6B and the second guide part 6C. That is, the guide part 6A is connected to the end of the hinge part 7 at the end opposite to the connecting end side with the outer guide part (first outer guide part 8A, second outer guide part 8B) among the ends of the inner guide part (first inner guide part 9A, second inner guide part 9B). The structure of the hinge part 7 is not particularly limited as long as it is not a notch structure; it may be a non-formed structure or a weakening structure.

[0243] The hinge part 7 can facilitate the smooth displacement of the first portion 3B relative to the second portion 3D. For example, in the cases of FIG. 20(a) and FIG. 20(b), when the lid 1 is not in use, the first portion 3B is in a state of being joined to the container 101 in the region corresponding to the first portion 3B of the joining area R, and the displacement of the first portion 3B is restricted. As shown in FIG. 21(a) and FIG. 21(b), when using the lid 1, the first portion 3B is raised against the second portion 3D from the outer peripheral edge of the first portion 3B (the outer end of the first edge 71A). At this time, the first portion 3B is peeled off from the edge 103 of the container 101. Then, the first portion 3B gradually rises against the second portion 3D while the first portion 3B and the second portion 3D are separated along the guide portion 6A. The guide portion 6A defines the boundary between the first portion 3B and the second portion 3D.

[0244] When the separation of the first portion 3B and the second portion 3D progresses to the inner end of the guide portion 6A, since the hinge portion 7 is formed, as shown in FIG. 21(b), the first portion 3B can rotate more smoothly in the direction of arrow F with respect to the second portion 3D using the hinge portion 7 as an axis. Then, the first portion 3B can be smoothly folded back to a position facing the exposed surface 70 side of the second portion using the hinge portion 7 as an axis. Thus, the hinge portion 7 becomes a part that can make the displacement of the first portion smoother. It is preferable that the hinge portion 7 forms a weakened structure from the viewpoint of smoothly forming the separation portion of the first portion 3B and the second portion 3D. However, this is an example, and the hinge portion 7 may be a non-formed part. A non-formed part indicates a part where the formation of a notch structure and a weakened structure is omitted.

(First Portion)

[0245] The first portion 3B is defined as a part that can be displaced by the displacement facilitation structure 5B when the lid 1 is attached to the container 101. Also, the first portion 3B is defined as a part that forms a predetermined area spreading inside the joining area R from a part of the outer peripheral edge 2A of the main body 2 (the first edge 71A) as a base end towards the inside of the main body 2 in a plan view of the lid 1.

(Shape of the First Portion)

[0246] The shape of the first portion 3B is determined according to the layout of the guide portion 6A of the displacement facilitation structure 5B. In the example of FIG. 20, the first portion 3B has a first side edge 77A and a second side edge 77B as two side edges 77, and an inner edge 73 connected to the side edges 77 at the inner end of the side edges 77, and the first edge 71A corresponding to the first portion 3B of the outer peripheral edge 2A of the main body 2 also serves as the front edge of the first portion 3B. In the first portion 3B, the first side edge 77A and the second side edge 77B extend in a direction intersecting each other (approaching each other) from the front edge (the first edge 71A) towards the inner edge 73 towards the inside of the main body 2. The first side edge 77A is formed as the first portion 3B and the second portion 3D are separated at the first guide portion 6B. The second side edge 77B is formed as the first portion 3B and the second portion 3D are separated at the second guide portion 6C.

[0247] The shape of the first portion 3B is not particularly limited, but as shown in FIG. 20(a) and the like, it is preferable to have a tapered shape from the base end (the first edge 71A) of the first portion 3B of the outer peripheral edge of the main body 2 towards the inside of the main body 2.

[0248] Such a shape of the first portion 3B can be realized by adopting a layout of the first guide portion and the second guide portion, where the first guide portion 6B and the second guide portion 6C extend in a direction intersecting towards the inside of the main body, as described above.

[0249] When the first portion 3B is formed in such a shape, it becomes easier to cause the separation of the first portion 3B and the second portion 3D along the extending direction of the guide portion 6A when displacing the first portion 3B against the second portion 3D. Then, with the separation of the first portion 3B and the second portion 3D, the aforementioned first side edge 77A and second side edge 77B are formed. The hinge portion 7 of the displacement facilitation structure 5B forms a part corresponding to the inner edge 73.

(Second Portion)

[0250] The second portion 3D is defined as a part that forms the area excluding the area formed by the first portion 3B of the main body 2 in a plan view of the lid 1, that is, the part excluding the first portion 3B of the main body 2. In the example of FIG. 20, at least a part of the boundary K1 between the second portion 3D and the first portion 3B is a structure divided by the guide portion 6A. In this example, the hinge portion 7, which will be described later, forms a continuous structural part at the boundary K1 between the second portion 3D and the first portion 3B. Also, as shown in FIG. 21(a), the part of the second portion 3D corresponding to the boundary K1 between the second portion 3D and the first portion 3B has a concave contour shape corresponding to a part of the contour of the first portion 3B.

(Small Opening)

[0251] As shown in FIG. 32, when the first portion 3B is displaced (in the example of FIG. 21(a), when the first portion 3B is folded back using the hinge portion 7 as an axis), a small opening 6 with a smaller opening area than the opening 102 is formed between the lid 1 and the container 101, as shown in FIG. 31. FIG. 31 and FIG. 32 are diagrams explaining the state where the first portion 3B is displaced in the container with lid 150, where the lid 1 according to the fourth embodiment is attached to the container 101. This can be realized by defining a size for the first portion 3B that allows the formation of the small opening 6. Also, when the small opening 6 is formed, the opening 102 and the space 105 of the container 101 are exposed from the small opening 6. The small opening 6 is formed in the area surrounded by the edge 103 of the container 101, the forming part of the facing surface 3H of the second portion 3D, and the hinge portion 7 in a plan view of the lid 1. According to such a lid 1, when the lid 1 is attached to the opening 102 of the container 101 into which a beverage is injected into the space 105, the user can consume the beverage inside the container 101 using the small opening 6 of the lid 1 as a drinking spout.

(Protrusion)

[0252] In the lid 1 according to the fourth embodiment, it is preferable that the protrusion 11 is provided. The protrusion 11 is a part protruding outward from the part corresponding to the first portion 3B of the outer peripheral edge 2A of the main body 2. This protrusion 11 can function as a knob to lift the first portion 3B when displacing the first portion 3B against the second portion 3D. For example, by lifting while pinching the tip 11A of the protrusion 11 or its vicinity, the first portion 3B is lifted along with the protrusion 11. The tip 11A indicates a predetermined part including the tip of the protrusion 11. The boundary K2 between the protrusion 11 and the first portion 3B is located on a part of the outer peripheral edge 2A of the main body 2, and a weakened structure may be formed along the boundary K2. This weakened structure may be similar to the weakened structure described in the displacement facilitation structure 5B.

[0253] The size of the protrusion 11 is not particularly limited, but in the examples of FIG. 20(a) and FIG. 20(b), it is a part extending outward from the entire first edge 71A of the first portion 3B, and is formed in a crescent shape in a plan view of the lid 1.

[0254] In the lid 1 according to the fourth embodiment shown in the example of FIG. 20(a), the protrusion 11 has a claw portion 23B inside the protrusion 11, and a receiving portion 20 is formed in the second portion 3D. However, this is not limited to the case where the lid 1 has the claw portion 23B and the receiving portion 20. The lid 1 may omit at least one of the claw portion 23B and the receiving portion 20.

(Claw Portion)

[0255] In modification example 5, the claw portion 23B is formed by allowing the claw forming portion 23C formed on the protrusion 11 to hang down from the protrusion 11. The claw forming portion 23C is formed with a notch structure. The claw forming portion 23C is formed in a convex shape from the tip 11A of the protrusion 11 towards the main body 2. By bending the claw forming portion 23C from the base end 24A so that the tip 24B of the claw forming portion 23C is directed downward while the user pinches the tip 11A or its vicinity of the protrusion 11, the claw forming portion 23C hangs down from the protrusion 11. At this time, the hanging part becomes the claw portion 23B.

(Receiving Portion)

[0256] The receiving portion 20 has a shape that allows the claw portion 23B to be inserted. Specifically, in the example of FIG. 20(a), the receiving portion 20 is a notch structure formed in a shape that allows the claw portion 23B of the protrusion 11 to be inserted. In modification example 5, as shown in FIG. 21(b), as the first portion 3B is folded back to the upper surface side of the second portion 3D using the hinge portion 7 as an axis, the protrusion 11 is displaced integrally with the first portion 3B. FIG. 21(a) is a plan view showing the state where the first portion 3B is folded back to the upper surface side (on the exposed surface 70) of the second portion 3D, and FIG. 21(b) is a longitudinal sectional view along line B-B shown in FIG. 21(a).

[0257] At this time, the protrusion 11 is displaced to a position where the claw portion 23B can be inserted into the receiving portion 20. That is, regarding the relative position of the claw portion 23B and the receiving portion 20, when the first portion 3B is folded back to the upper surface side of the second portion 3D using the hinge portion 7 as an axis, the claw portion 23B and the receiving portion 20 are positioned to face each other. Then, when the claw portion 23B of the protrusion 11 is inserted into the receiving portion 20, the state where the first portion 3B is folded back to the upper surface side of the second portion 3D can be stably maintained.

1-2 Operation and Effect

[0258] According to the lid 1 of the fourth embodiment, the displacement facilitation structure 5B is formed, and the first portion 3B can be smoothly displaced against the second portion 3D by the displacement facilitation structure 5B. At this time, internal breakage is less likely to occur at the boundary between the first portion 3B and the second portion 3D. Therefore, after the small opening 6 is formed by the displacement of the first part 3B relative to the second part 3D, it becomes easy to close the small opening 6 again with the first part 3B as tightly as possible. It should be noted that the state in which the small opening 6 is exposed while the first part 3B is at least partially separated from the second part 3D is referred to as the open state. The state in which the small opening 6 is covered by the first part 3B is referred to as the closed state. Once the open state is formed and then returns to the closed state, it is referred to as the re-closed state.

[0259] Conventionally, when a liquid such as a beverage is contained inside a container with a lid, the user would peel off the film material forming the lid to expose the mouth of the container in order to consume the contents. In this case, even if one tried to cover the exposed mouth part again with the lid (sometimes referred to as the re-closed state), the state of the mouth being covered by the lid was easily undone. Furthermore, when the mouth was covered with the lid, a gap of significant size was likely to form between the lid and the mouth. In such cases, liquid is likely to leak out from the gap between the lid and the mouth.

[0260] In this regard, according to the lid 1 of the present invention, since the first part 3B and the second part 3D are easily separated along the guide part 6A when forming the open state, as shown in FIG. 28, the end face 72C of the side edge 77 of the first part 3B and the face of the second part facing this end face (facing face 3H) are easily aligned, and in the re-closed state, the end face 72C of the side edge 77 of the first part 3B and the face of the second part facing this end face (facing face 3H) are likely to be in contact.

[0261] FIG. 28 is an enlarged view of the main part to explain the contact state between the first part 3B and the second part 3D. When the lid 1 is formed of a paper-based material in the state shown in FIG. 28, the fibers of the paper-based material are easily exposed at the end face 72C and the facing face 3H, and friction is likely to occur at the end face 72C and the facing face 3H. In this case, the risk that the first part 3B and the second part 3D will generate friction with each other and the first part 3B will easily detach from the second part 3D is suppressed, and the state in which the small opening 6 is re-closed by the first part 3B can be maintained more stably. However, in the lid 1, since at least the guide part 6A becomes a part that separates the first part 3B and the second part 3D when in the open state, it is possible to ensure breathability even in the re-closed state, and it is possible to allow steam to pass through at least part of the boundary between the first part 3B and the second part 3D.

1-3 Modification Examples

[0262] Next, modification examples of the lid 1 according to the fourth embodiment will be described.

Modification Example 1

[0263] In the example of the lid 1 according to the fourth embodiment, the first inner guide part 9A and the second inner guide part 9B extend in a direction intersecting towards the inside of the main body 2, but the layout of the first inner guide part 9A and the second inner guide part 9B is not particularly limited to the shape shown in FIG. 20. The lid 1 according to the fourth embodiment may be formed such that at least one of the first inner guide part 9A and the second inner guide part 9B extends along the inner edge RA of the joining region R, as shown in FIG. 23(a) and the like (Modification Example 1).

[0264] FIG. 23(a) is a plan view showing an example of the lid 1 according to Modification Example 1 of the fourth embodiment. In the example of FIG. 23(a), both the first inner guide part 9A and the second inner guide part 9B are formed in a shape along the inner edge RA of the joining region R. In this case, the first part 3B is formed in a shape having at least part of a contour shape that spreads along the inner edge RA of the joining region R, in the inner part of the joining region R. And the end of the hinge part 7 is connected to the end of each of the first inner guide part 9A and the second inner guide part 9B (the end different from the one connected to the first outer guide part 8A and the second outer guide part 8B).

Modification Example 2

[0265] In the example of the lid 1 according to Modification Example 1 of the fourth embodiment, the first inner guide part 9A and the second inner guide part 9B are formed along the inner edge RA of the joining region R, and the hinge part 7 is formed, but as shown in FIG. 23(b), the hinge part 7 may be omitted (Modification Example 2). FIG. 23(b) is a plan view showing an example of the lid 1 according to Modification Example 2 of the fourth embodiment. In this example, the part of the first part 3B formed inside the joining region R is formed in a shape along the inner edge RA of the joining region R.

[0266] In FIG. 23(b), the end 9A1 of the first inner guide part 9A and the end 9B1 of the second inner guide part 9B are connected. In such a case, since the first inner guide part 9A and the second inner guide part 9B of the guide part 6A are formed along the inner edge RA of the joining region R and the hinge part 7 is omitted, it becomes easy to completely separate the first part 3B from the second part 3D along the boundary K1. In this case, the small opening 6 is formed in the part surrounded by a part of the edge 103 of the container 101 (the part of the edge 103 formed in the part exposed by the displacement of the first part 3B) and the facing face 3H (inner end face) of the second part 3D.

Modification Example 3

[0267] In the lid 1 according to the fourth embodiment, as shown in FIG. 27, the displacement facilitating structure 5B may form a protruding curved portion 14 that curves from the first part 3B towards the second part 3D in the guide part 6A (Modification Example 3). FIG. 27 is a plan view showing an example of the lid of Modification Example 3 of the fourth embodiment. In the first part 3B, the part corresponding to the protruding curved portion 14 forms a convex portion 15. In the example shown in FIG. 27, the convex portion 15 is formed in the part of the first part 3B formed inside the joining region R. At this time, the second part 3D forms a concave shape part 15C corresponding to the contour of the convex portion 15.

[0268] According to Modification Example 3, the length of the boundary K1 between the first part 3B and the second part 3D is increased, and the area of the end face 72C of the first part 3B and the facing face 3H of the second part 3D can be increased. As a result, the re-closed state in which the small opening 6 is re-closed by the first part 3B can be maintained more stably.

Modification Example 4

[0269] In the lid 1 according to the fourth embodiment, as shown in FIG. 22(b), when the receiving part 20 is formed in the second part 3D, the tip 11A of the protruding part 11 may be formed in a shape corresponding to the shape of the receiving part 20. (Modification Example 4). FIG. 22(b) is a plan view showing an example of the lid according to Modification Example 4 of the fourth embodiment.

[0270] In Modification Example 4, the receiving part 20 is a notch formed in a shape that allows the tip 11A of the protruding part 11 to be inserted. In Modification Example 4, as the first part 3B is folded over the upper surface side (exposed surface 70 side) of the second part 3D with the hinge part 7 as the axis, the protruding part 11 displaces integrally with the first part 3B. At this time, the protruding part 11 displaces to a position where its tip 11A can be inserted into the receiving part 20. And when the tip 11A of the protruding part 11 is inserted into the receiving part 20, the state in which the first part 3B is folded over the upper surface side of the second part 3D can be stably maintained.

Modification Example 5

[0271] In the lid 1 according to the fourth embodiment, as shown in FIG. 22(a), the first part 3B may have a claw part 23B on its inside and the second part 3D may have a receiving part 20 formed (Modification Example 5). FIG. 22(a) is a plan view showing an example of the lid according to Modification Example 5 of the fourth embodiment. The structure of the claw part 23B and the receiving part 20, and the relative position of the claw part 23B and the receiving part 20 may be the same as in Modification Example 5. In this case, the same effect as in Modification Example 5 can be obtained.

Modification Example 6

[0272] In the lid 1 according to the fourth embodiment, as shown in FIG. 25, a protruding part 22 that protrudes outward from a part of the portion corresponding to the second part 3D of the outer peripheral edge 2A of the main body 2 may be formed (Modification Example 6). FIG. 25 is a diagram showing an example of the lid according to Modification Example 6 of the fourth embodiment. In this case, the protruding part 11 protruding from the part corresponding to the first part 3B of the outer peripheral edge 2A of the main body 2 is referred to as the first protruding part 11B. And the protruding part 22 protruding from the part corresponding to the second part of the outer peripheral edge 2A of the main body 2 is referred to as the second protruding part 22A. It is preferable that the first protruding part 11B and the second protruding part 22A are arranged such that the center CP of the main body 2 is present between the first protruding part 11B and the second protruding part 22A in a plan view of the lid 1. In this case, for example, an operator attaching the lid 1 to the container 101 can pinch the second protruding part 22A to attach the lid 1 to the container 101, and the user of the container 101 can pinch the first protruding part 11B to displace the first part 3B relative to the second part 3D. That is, the possibility of the first protruding part 11B and its surroundings being contaminated by someone other than the user touching the first protruding part 11B is suppressed.

Modification Example 7

[0273] In the lid 1 according to Modification Example 7 of the fourth embodiment, a claw part 23B may be formed on the first protruding part 11B, and a receiving part 20 may be formed on the second protruding part 22A (not shown). The structure of the claw part 23B and the receiving part 20, and the relative position of the claw part 23B and the receiving part 20 may be the same as in Modification Example 5. In this case, the same effect as in Modification Example 5 can be obtained.

Modification Example 8

[0274] In the lid 1 according to the fourth embodiment, as shown in FIGS. 24(a) and 24(b), a tab member 31 may be provided on the outer peripheral edge 75B of the protruding part 11 or the outer peripheral edge 2A of the main body 2 (Modification Example 8). FIGS. 24(a) and 24(b) are plan views showing an example of the lid 1 according to Modification Example 8 of the fourth embodiment. In the lid 1 shown in FIG. 24(a), multiple tab members 31 are provided on the outer peripheral edge 75B of the protruding part 11. In the lid 1 shown in FIG. 24(b), multiple tab members 31 are provided on the portion corresponding to the second part 3D of the outer peripheral edge 2A of the main body 2 (second edge 71B). FIG. 24(a) and FIG. 24(b) are examples, and the number of tab members 31 and the like are not limited to those shown in these figures. It is preferable that each tab member 31 has a printed section with decorative images such as predetermined text or graphics. When a printed section is formed, it is preferable that the printed section is formed on both the exposed surface side and the back side of the tab member 31 (not shown).

Modification Example 9

[0275] The lid 1 according to Modification Example 9 of the fourth embodiment may be configured so that the claw portion 23B is not locked to the receiving portion 20, but is locked to a predetermined place such as the edge 103 of the lid 1 or the container 101. By locking the claw portion 23B in this way, it is possible to maintain the state where the small opening 6 is formed open and the state where the small opening 6 is closed again after being formed open. The configuration that can maintain the state where the small opening 6 is formed open and the configuration that can maintain the state where the small opening 6 is closed again may be other than those described above.

2 Fifth Embodiment

2-1 Configuration

(Lid)

[0276] The lid 1 according to the fifth embodiment, as shown in FIG. 33(a) and FIG. 33(b), has a groove 80 formed in the region corresponding to the inside of the joining area R (inner region Rn of the joining area R) on the non-formed surface (exposed surface 70) of the joining area R of the main body 2 in a plan view of the lid 1. FIG. 33(a) and FIG. 33(b) are diagrams showing an example of the lid 1 according to Modification Example 1 of the fifth embodiment. The lid 1 according to the fifth embodiment is similar to the fourth embodiment regarding other configurations forming the groove 80 (such as the displacement facilitation structure 5b), so their descriptions are omitted.

(Groove)

[0277] In the lid 1 according to the fifth embodiment, it is preferable that the groove 80 is formed to extend along the inner edge RA of the joining area R in the inner region Rn of the joining area R. The depth of the groove 80 is not particularly limited, but it is preferable that it is configured to gradually deepen as it approaches the first portion 3B from a position far from the first portion 3B along the direction in which the groove 80 extends, as shown in FIG. 34(a), FIG. 34(b), and FIG. 34(c). As also shown in FIG. 34(b) and FIG. 34(c), the depth D2 of the groove 80 at a position far from the first portion 3B is shallower than the depth D1 of the groove 80 at a position closer to the first portion 3B along the direction in which the groove 80 extends. Moreover, it is preferable that the groove 80 is also formed in the first portion 3B and the second portion 3D, as shown in the examples of FIG. 33(a) and FIG. 34(a). In this example, the groove 80 extends so as to cross the boundary K1 between the first portion 3B and the second portion 3D. This can be realized by forming the groove 80 so that it also crosses the guide portion 6A. In the example of FIG. 33(a), the groove 80 is formed to traverse the first portion 3B. In this example, the groove 80 is formed in a shape extending in a curve along the inner edge RA in the first portion 3B.

[0278] In this example, the groove 80 is formed in a C-shape along the inner edge RA of the joining area R. However, this is just an example of the overall shape of the groove 80, and the shape of the groove 80 is not particularly limited. The groove 80 may be formed in an annular shape, for example, as shown in FIG. 35.

[0279] Even when the groove 80 is formed, the guide portion 6A may form a notch structure, or may form a fragile structure such as a half-cut structure. However, when the guide portion 6A forms a half-cut structure, even if the groove 80 is in a state where its depth is deepened and is formed across the guide portion 6A (across the boundary K1 between the first portion 3B and the second portion 3D), gaps are less likely to occur at the position where the guide portion 6A and the groove 80 intersect.

(Convex Strip)

[0280] In the lid 1, as shown in FIG. 33(b), it is preferable that the position corresponding to the formation position of the groove 80 and the position on the opposite side of the formation surface (exposed surface 70) of the groove 80 is a convex strip 82. In this case, as shown in FIG. 39, it is preferable that the convex strip 82 is formed in a position that contacts the inner surface side of the edge 103 of the opening 102 of the container 101. Moreover, it is preferable that the height of the convex strip 82 is secured to a degree that makes it difficult for the exposed surface 70 of the lid 1 to deviate in the surface direction relative to the edge 103 of the opening 102 of the container 101. Such a convex strip 82 can be realized by embossing the lid 1. By embossing, the groove 80 is formed on the exposed surface 70 side of the lid 1, and a convex strip 82 with a height corresponding to the depth of the groove 80 is formed at the position on the opposite side corresponding to the formation position of the groove 80. Then, by forming the groove 80 along the inside of the edge 103 of the opening 102 of the container 101, as shown in FIG. 39, the convex strip 82 can be formed along the inner end of the edge 103 of the opening 102 of the container 101 and in contact with the inner surface side of the edge 103 of the opening 102 of the container 101. Note that FIG. 39 is a cross-sectional view showing an example in which the lid 1 is placed on the container 101.

[0281] With such a convex strip 82 formed, it becomes easy to align the position of the lid 1 with respect to the container 101 when placing the lid 1 to cover the opening 102 of the container 101.

2-2 Operation and Effect

[0282] According to the lid 1 of the second embodiment, when the lid 1 is joined to the opening 102 of the container 101 containing liquid, even if liquid leaks from inside the container 101 onto the exposed surface 70 of the lid 1, it is possible to make the liquid flow into the groove 80 before it spills outside the lid 1. Also, if the groove 80 is formed to deepen toward the first portion, the liquid that has flowed into the groove 80 can be made to flow down toward the position of the first portion. Then, by lifting the first portion to expose the small opening 6, the liquid can be made to drip from the small opening 6 into the container. As shown in FIG. 38, in the fifth embodiment as well, similar to the fourth embodiment, the small opening 6 is formed when the first portion 3B is displaced, for example, in the portion surrounded by the hinge portion 7, the portion corresponding to the facing surface 3H of the second portion, and the edge 3G.

[0283] Also, when the groove 80 is formed in the first portion 3B, as shown in FIG. 40, when forming a re-closed state by pressing the first portion 3B against the edge 103 of the container 101, the first portion 3B slightly bends at the position of the groove 80, and the restoring force from that bend can strongly press the edge 103 of the container 101, which is considered to further strengthen the contact between the first portion 3B and the edge 103. As a result, the small opening 6 can be more securely sealed with the first portion 3B.

2-3 Modification Examples

[0284] Modification examples of the fifth embodiment will be described.

Modification Example 1

[0285] In the lid according to the fifth embodiment shown in FIG. 36, the number of grooves 80 formed may be multiple. Regarding the layout of the grooves 80, as shown in FIG. 36, multiple grooves 80 may be formed concentrically. FIG. 36 is a plan view of the lid 1 according to Modification Example 1 of the fifth embodiment. As shown in Modification Example 1 of the fifth embodiment, when there are multiple grooves 80, one type of lid 1 can be used to cover the openings 102 of multiple types of containers 101 with different diameters of the opening 102.

Modification Example 2

[0286] In the lid according to the fifth embodiment, when the groove 80 is formed in an annular shape, as shown in FIG. 37, the main body 2 may be formed so that the portion corresponding to the inner region (inner region part 90) is positioned higher than the portion corresponding to the outer region (outer region part 91) in a plan view of the lid 1. FIG. 37 is a cross-sectional view showing an example of the lid 1 according to Modification Example 2 of the fifth embodiment. According to the lid 1 of Modification Example 2 of the fifth embodiment, when the lid 1 is attached to the container 101 containing liquid, even if liquid leaks onto the inner region part 90 of the exposed surface 70 of the lid 1, it becomes easier for the liquid to flow from the inner region part 90 into the groove 80 on the exposed surface 70 of the lid 1.

3 Sixth Embodiment

3-1 Configuration

(Lid)

[0287] In the lid 1 according to the third embodiment, as shown in FIG. 41, a recessed portion 85 may be formed in the second portion 3D, in the inside (inner region Rn) of the joining area R, in a predetermined area of the non-formed surface (exposed surface 70) of the joining area R. FIG. 41 is a diagram showing an example of the lid 1 according to the third embodiment. The lid 1 according to the sixth embodiment is similar to the fourth embodiment regarding other configurations forming the recessed portion 85 (such as the displacement facilitation structure 5B), so their descriptions are omitted.

(Recessed Portion)

[0288] The recessed portion 85 is formed in the region from the inner edge RA of the joining area R to a predetermined position toward the center of the main body 2 in the second portion 3D. In the example of FIG. 41, the bottom surface 87 of the recessed portion 85 has a sloped surface that descends from the reference position STP toward the first portion 3B, when the farthest position from the portion corresponding to the first portion 3B of the inner edge RA of the joining area R is set as the reference position STP. However, this does not prohibit the bottom surface 87 of the recessed portion 85 from being flat.

(Raised Portion)

[0289] In the lid 1, it is preferable that the position on the opposite side of the formation surface (exposed surface 70) of the recessed portion 85 is a raised portion 86. In this case, it is preferable that the outer peripheral end of the raised portion 86 is formed to contact the inner surface side of the edge 103 of the opening 102 of the container 101. Moreover, it is preferable that the height of the raised portion 86 is secured to a degree that makes it difficult for misalignment to occur relative to the opening 102 of the container 101. Such a protrusion 86 can be realized by embossing the lid 1. Through embossing, a recess 85 is formed on the exposed surface 70 side of the lid 1, and a protrusion 86 with a height corresponding to the depth of the recess 85 is formed on the opposite side corresponding to the position of the recess 85. Then, by forming the recess 85 so that its contour shape follows the opening 102 of the container 101, the protrusion 86 can be formed to contact the inner surface side of the edge 103 of the opening 102 of the container 101.

3-2 Operation and Effect

[0290] According to the lid 1 of the third embodiment, when the lid 1 is joined to the opening 102 of the container 101 containing liquid, even if liquid leaks from inside the container 101 onto the exposed surface 70 of the lid 1, it is possible to allow the liquid to flow into the recess 85 before spilling outside the lid 1.

3-3 Modified Example

[0291] A modified example of the sixth embodiment will be described.

Modified Example

[0292] According to the lid 1 of the sixth embodiment, as shown in FIG. 42, the recess 85 may be formed over the entire body 2. FIG. 42 is a diagram showing an example of the lid 1 according to a modified example of the sixth embodiment. In the lid 1 according to the modified example of the sixth embodiment, the recess 85 is shaped to sink in a conical manner from the outer peripheral edge 2A of the body 2 towards the center of the body 2. According to the lid 1 of the modified example of the sixth embodiment, when the lid 1 is joined to the opening 102 of the container 101 containing liquid, it is possible to allow the liquid to flow into the recess 85 before spilling outside the lid 1, regardless of the position on the exposed surface 70 of the lid 1 where the liquid leaks.

4 Application Example

[0293] The lid 1 according to the fourth embodiment can be used for a container 150 with a lid, as shown in FIGS. 29, 30, etc. FIGS. 29 and 30 are a perspective view and a cross-sectional view showing an example in which the lid 1 according to the fourth embodiment is joined to the edge 103 of the opening 102 of the container 101 having the opening 102. The container 150 with a lid has a joint 151 where the container 101 and the lid 1 are joined, and the area of the lid 1 forming the joint 151 becomes the joint region R. The method of joining the lid 1 and the container 101 is not particularly limited and can be appropriately used with joining methods such as crimping or heat sealing. Below, the case where the lid 1 according to the fourth embodiment is used for the container 150 with a lid will be described as an example.

[0294] The container 101 has a cylindrical side wall 104 and a bottom portion 106 that widen upward, forming a space 105 inside, and an opening 102 at the upper end of the body (upper end of the side wall 104). Although not shown, the opening 102 of the container 101 is formed in a circular shape. However, the container 101 shown here is an example and does not limit the configuration of the container 101. For example, the container may have a rectangularly shaped mouth. The container may be any that can have its mouth covered by a lid. Also, what is stored inside the container is not particularly limited and can include, for example, liquid, solid, or combinations thereof.

[0295] In the container shown in FIGS. 29 and 30, a curl portion 109, where the member forming the body of the container is wound outward, is formed on the edge 103 of the opening 102, but the container 101 is not limited to this. The end surface of the side wall 104 may be exposed at the edge 103 of the opening 102, or a flange extending outward from the opening 102 of the container 101 may be formed at the edge 103 of the opening 102.

[0296] Also, the lid according to the fourth embodiment may be combined with a container having a mouth.

[0297] The matters shown in [4 Application Example] above are not limited to the use of the lid 1 according to the fourth embodiment and are also applicable to the fifth to sixth embodiments.

[0298] The seventh to ninth embodiments of the lid according to the present invention will be described in detail with reference to the drawings.

1 Seventh Embodiment

1-1 Configuration

(Lid)

[0299] The lid 1 according to the seventh embodiment is used by being joined along the edge 103, which is specified as the portion extending outward from the edge of the opening 102 of the container 101, as will be described later with reference to FIG. 44, etc. Therefore, the lid 1 is formed so as to be capable of forming a joint region R that is joined to the edge 103 of the container 101 having the opening 102. Also, the lid 1 is formed in a shape that allows it to cover the opening 102 when joined to the opening 102 of the container 101, forming a state where it is attached to the edge 103 (joined to the edge 103).

[0300] As shown in FIG. 43, the lid 1 has a joint region R that is joined to the edge 103 formed on the upper end side of the opening 102 of the container 101. FIG. 43 is a diagram showing an example of the lid 1. As for the container 101, those having flexibility at the edge of the opening 102 are more preferably used. However, these do not prohibit the container 101 from being a container with little or no flexibility, such as a metal container.

[0301] The lid 1 includes a body 2, as shown in FIGS. 43A, 43B, etc. In the lid 1, the body 2 includes the joint region R. FIGS. 43A and 43B are a plan view and a cross-sectional view showing one of other examples of the lid 1, respectively.

(Joint Region)

[0302] The joint region R indicates the area of the lid 1 that is joined to the edge 103 when the lid 1 is attached to the edge 103, which is specified as the portion extending outward from the edge 102A formed at the upper end of the opening 102 of the container 101. Also, in the lid 1, the portion of the body 2 forming the joint region R is called the joint region corresponding part 5. In the examples of FIGS. 43A and 43B, the joint region R corresponds to the area formed generally annularly along the opening 102 in a shape corresponding to the opening 102 of the container 101. In this case, the joint region corresponding part 5 is defined as the annular portion including the joint region R. If the joint region R between the lid 1 and the container 101 is not continuously joined, the portion sandwiched between adjacent joint regions R is also included in the joint region corresponding part 5.

[0303] The width of the joint region R (width along the inner and outer directions) (i.e., the width of the joint region corresponding part 5) is usually the same as or narrower than the width of the edge 103 of the opening 102. However, this does not prohibit the width of the joint region R from being wider than the width of the edge 103 of the opening 102. Also, the joint region R may be formed inside the outer peripheral edge 2A of the body 2, or it may be formed up to the outer peripheral edge 2A of the body 2.

[0304] In the plan view of the lid 1 (i.e., in the plan view of the body 2), the inner edge end of the joint region R (i.e., the inner edge end 5C of the joint region corresponding part 5) is located slightly outside the edge of the opening 102 in the example of FIG. 43, but this is an example, and it may be located significantly outside from directly above the edge 102A of the opening 102, directly above the edge 102A of the opening 102, or inside from directly above the edge 102A of the opening 102. Note that the plan view of the lid 1 refers to the case where the lid 1 is viewed in the direction from the +Z side to the Z side along the Z-axis direction in FIGS. 43A and 43B. The plan view of the body 2 is also defined as the case where the body 2 is viewed in the direction from the +Z side to the Z side, similar to the plan view of the lid 1.

[0305] Note that in the plan view of the lid 1, the area inside the joint region R of the body 2 may be referred to as the inner region Rn. Also, the term above the joint region R refers to the upper surface side (exposed surface 70 side) of the portion corresponding to the joint region R of the lid 1 in the plan view of the lid 1.

(Body)

[0306] As shown in FIG. 43A, the body 2 covers the opening 102 and the edge 103 when the lid 1 is attached over the opening 102 of the container 101. The body 2 has a portion corresponding to the joint region R (joint region corresponding part 5), and includes an outer part 72 containing the joint region R and an inner part 72D composed of the portion inside from the inner edge 72A of the outer part 72. Note that the direction from the center CT of the body 2 outward is referred to as the outer direction, and the direction from the outer peripheral edge 2A of the body 2 towards the center CT is referred to as the inner direction.

(Outer Part)

[0307] In the plan view of the lid 1, the portion of the body 2 outside the inner edge of the joint region R (i.e., the inner edge end 5C of the joint region corresponding part 5) is referred to as the outer part 72.

(Inner Part)

[0308] In the plan view of the lid 1, the inside of the joint region R (i.e., the inside of the joint region corresponding part 5) refers to the portion forming the inside of the part forming the joint region R of the lid 1. This portion is referred to as the inner part 72D.

(First Part and Second Part)

[0309] The body 2 includes a first part 3C and a second part 3E. In the example of FIG. 43, the boundary part 5A formed by the boundary between the first part 3C and the second part 3E includes a guide part 6A and a hinge part 7. The combination of the guide part 6A and the hinge part 7 can form a displacement facilitation structure that facilitates the rotation of the first part 3C.

(First Part)

[0310] The first part 3C indicates the portion of the body 2 that is defined as the part that is rotated upward to expose the opening 102 when the body 2 is joined to the edge 103 of the container 101. Here, the rotation of the first part 3C indicates that the first part 3C is displaced to rotate about the hinge part 7, which will be described later. When the first part 3C rotates, deformation of the shape of the first part 3C may accompany it. Rotating the first part 3C upward can be achieved, for example, by lifting the first part 3C. The shape of the first part 3C is not particularly limited, but in examples such as FIG. 43A, it is generally formed in a semi-circular shape in a plan view of the lid 1. In this example, the first part 3C is formed on the inner side 72D (i.e., inside the joint region corresponding part 5).

(Second Part)

[0311] The second part 3E indicates the portion of the main body 2 excluding the first part 3C.

(Boundary Section)

[0312] In the main body 2, the boundary section 5A indicates the part defined as the boundary between the first part 3C and the second part 3E in a non-rotating state. The non-rotating state refers to the state of the main body 2 where the rotation of the first part 3C relative to the second part 3E is restricted. For example, the non-rotating state is when the first part 3C is not rotated when the lid 1 is not in use.

(Guide Section and Hinge Section)

[0313] The boundary section 5A includes a guide section 6A and a hinge section 7.

[0314] The hinge section 7 is defined as the part that becomes the rotation axis of the first part 3C when forming an upward displacement state. The upward displacement state is specified as the state of the main body 2 when the first part 3C is rotated upward (in the direction causing displacement on the +Z side, +F direction in the example of FIG. 43B) relative to the second part 3E.

[0315] Rotating the first part 3C upward means rotating it in a direction along a plane perpendicular to the horizontal plane (corresponding to the upper surface of the main body 2 (exposed surface 70) in the example of FIG. 43A, corresponding to the XY plane spanned by the X and Y axes), as well as rotating it in a direction along a plane that intersects the horizontal plane obliquely.

[0316] The guide section 6A defines the position intended to cause separation between the first part 3C and the second part 3E when forming an upward displacement state. The guide section 6A is defined as the part that specifies the intended position for causing separation between the first part 3C and the second part 3E when forming an upward displacement state.

(Guide Section)

[0317] In the examples of FIG. 43A and FIG. 43B, the guide section 6A is specified as the part extending in the direction away from the hinge section 7, with the ends of the hinge section 7 (one end 7A, the other end 7B) as the base end. In this example, one end 6D of the guide section 6A is connected to one end 7A of the hinge section 7, and the other end 6E of the guide section 6A is connected to the other end 7B of the hinge section 7.

[0318] Additionally, the guide section 6A is formed in a convex shape in the direction away from the hinge section 7, has a front end 6F, and extends in a linear (curved) manner. However, this is just one example, and the shape of the guide section 6A is not limited to being convex, and the guide section 6A may be formed in a state different from the linear (curved) shape shown in FIG. 43A.

(Positional Relationship Between Guide Section and Joint Region)

[0319] In the example of FIG. 43A, the guide section 6A is formed inside the joint region R, that is, it is formed on the inner side 72D. The guide section 6A can be the part where the separation structure between the first part 3C and the second part 3E is formed when the first part 3C is rotated relative to the second part 3E.

(Positional Relationship Between Guide Section and Opening)

[0320] In the example of FIG. 43A, the guide section 6A is formed in a position slightly inside along the edge 102A of the opening 102 of the container 101, directly above (+Z direction side) when the lid 1 is joined to the container 101. However, this is just one example, and at least part of the guide section 6A may be positioned directly above the edge 102A of the opening 102, or it may not be along the edge 102A, and the guide section 6A may be positioned significantly inside the edge 102A of the opening 102 in a plan view of the lid 1, but from the perspective of making it easier for the first part 3C to contact the inner peripheral surface 104A of the container 101 when the first part 3C is rotated downward to form a downward displacement state, it is preferable for it to be positioned directly above or outside the edge 102A of the opening 102.

[0321] The structure of the guide section 6A is not particularly limited, but as mentioned above, it is a weakened structure. However, this does not restrict the guide section 6A from being a structure other than a cut structure.

[0322] For example, the guide section 6A may have a cut structure.

[0323] In this specification, a cut structure refers to a slit-like through structure that penetrates entirely from the non-facing side (exposed surface 70) to the facing side (back surface) relative to the opening 102 when the lid 1 is attached to the container 101. A weakened structure refers to a structural part that can reduce the force required for displacement compared to parts not endowed with such a structure, such as a perforated structure or a half-cut structure.

[0324] A perforated structure indicates a structure where cut parts penetrating from the exposed surface 70 to the back surface and continuous parts avoiding cuts are alternately formed. A half-cut structure indicates a structure (partial cut structure) where partially cut parts are formed while avoiding penetration in the thickness direction of the material forming the main body 2. The depth of the cut in a half-cut structure is not particularly limited concerning the material constituting the main body 2.

[0325] In the guide section 6A, the structure may partially differ. For example, a half-cut structure may be formed near the front end 6F of the guide section 6A, while a cut structure may be formed in other parts. If the front end 6F of the guide section 6A is located in the joint region corresponding part 5, even if the entire guide section 6A is a cut structure, the unintended opening of the first part 3C is suppressed by the joint structure (joint section 151) between the container 101 and the lid 1.

(Hinge Section)

[0326] As shown in the examples of FIG. 43A and FIG. 43B, the boundary section 5A includes a hinge section 7. In this example, the ends 7A, 7B of the hinge section 7 are connected to the respective ends 6D, 6E of the guide section 6A. The structure of the hinge section 7 is not particularly limited as long as it is not a cut structure; it may be a non-formed structure or a weakened structure. A non-formed structure indicates a part where the formation of cut structures and weakened structures is omitted. That is, the non-formed structure here indicates that the main body 2 is configured so that the hinge section 7 becomes apparent when the first part 3C is rotated upward or downward.

[0327] When using the lid 1, the first part 3C is raised relative to the second part 3E. At this time, the first part 3C gradually rises while rotating relative to the second part 3E around the hinge section 7, with the first part 3C and the second part 3E separating generally along the guide section 6A. From the perspective of smoothly forming the separation part between the first part 3C and the second part 3E, it is preferable for the hinge section 7 to form a weakened structure. However, this is just one example, and as mentioned above, the hinge section 7 may be a non-formed structure.

(Positional Relationship between Hinge Section and Joint Region)

[0328] In the example of FIG. 43A, the hinge section 7 is formed inside the joint region R, that is, it is formed on the inner side 72D. However, this is just one example, and the hinge section 7 may be formed directly above the joint region R in a plan view of the lid 1, or it may be formed outside the joint region R.

(Positional Relationship Between Hinge Section and Opening)

[0329] In the example of FIG. 43A, the ends 7A, 7B of the hinge section 7 are formed in a position slightly inside directly above the edge 102A of the opening 102 of the container 101 when the lid 1 is joined to the container 101. However, this is just one example, and at least one end (7A, 7B) of the hinge section 7 may be formed directly above the edge 102A of the opening 102, or it may be formed in a position outside directly above the edge 102A. From the perspective of making it easier for the first part 3C to contact the inner peripheral surface 104A of the container 101 when the first part 3C is rotated downward to form a downward displacement state, it is preferable for the ends 7A, 7B of the hinge section 7 to be positioned directly above or outside the edge 102A of the opening 102 in a plan view of the lid 1.

(Exposed Opening)

[0330] As shown in FIG. 44, when the first part 3C is in a displaced state (upward displacement state), an exposed opening 6H is formed to expose the space 105 from the opening 102. According to the lid 1, when the lid 1 is attached to the opening 102 of the container 101 into which liquids such as beverages or miso soup have been poured into the space 105, the user can consume the liquids inside the container 101 using the exposed opening 6H of the lid 1 as a drinking spout.

(Downward Displacement State)

[0331] The main body 2 is configured to form a downward displacement state as shown in FIG. 43B and FIG. 44. Here, the downward displacement state is defined as the state of the main body 2 where the first part 3C is pushed down (rotated downward) in the direction below the second part 3E (in the direction causing displacement on the Z side, F direction in the example of FIG. 43B) with the hinge section 7 as the rotation axis. Rotating the first part 3C downward means rotating it in a direction along a plane perpendicular to the horizontal plane (corresponding to the upper surface of the main body 2 (exposed surface 70) in the example of FIG. 43A, corresponding to the XY plane), as well as rotating it in a direction along a plane that intersects the horizontal plane obliquely. In the examples of FIG. 43B and FIG. 44, when the first part 3C is rotated downward, the first part 3C rotates in the F direction with the hinge section 7 as the rotation axis.

[0332] When the first portion 3C of the main body 2 is rotated to an upward displacement state and then pushed downward to cover the outlet 6H again, the first portion 3C is returned to a position corresponding to a non-rotating state. Furthermore, when the first portion 3C is pushed downward, it is defined as being pushed further downward than the second portion 3E, using the hinge part 7 as the rotation axis. Particularly, when the entire lid 1 has a structure with paper-based material, since the main body 2 also has paper-based material, it is possible to form a state where the first portion 3C is bent, and in a state where the first portion 3C has downward bending, it can be pushed further downward than the second portion 3E.

[0333] In cases where the tab member 31, which will be described later, is provided on the first portion 3C, the part of the first portion 3C where the tab member 31 is joined (the tab joint 18 described later) is stiffer than other parts of the first portion 3C (parts other than the tab joint 18). Thus, when the tab member 31 is provided on the first portion 3C, it is possible to impart a difference in stiffness to the first portion 3C, allowing for the efficient formation of a state where the first portion 3C has downward bending, particularly in the vicinity of the tab joint 18 where the tab member 31 is joined. Therefore, when a downward displacement state is formed with the lid 1 joined to the container 101, the resilience from the bending of the first portion 3C allows the first portion 3C to contact the inner peripheral surface 104A of the container 101 more strongly.

(Tab Member)

[0334] As shown in examples such as FIG. 43A and FIG. 43B, it is preferable that the lid 1 has a tab member 31 attached to the first portion 3C. The attachment position and direction of the tab member 31 on the first portion 3C are not particularly limited, but in the examples of FIG. 43A and FIG. 43B, the tab member 31 is joined to the first portion 3C at a position closer to the tip (front end) (i.e., near the front end 6F of the guide part 6A). At this time, the joint between the tab member 31 and the first portion 3C is referred to as the tab joint 18. In this example, the tab joint 18 is formed at one end 21A of the tab member 31. Also, in this example, the tab joint 18 is formed at a position closer to the tip of the first portion 3C. Methods for joining the tab member 31 to the first portion 3C (i.e., methods for forming the tab joint 18) can include various methods such as ultrasonic bonding, heat sealing, and adhesive bonding. Among the methods mentioned above, ultrasonic bonding is preferred for forming the tab joint 18 from the perspective of ease of bonding and bonding strength. The formation position of the tab joint 18 on the first portion 3C is preferably offset from the center of the first portion 3C to facilitate lifting the first portion 3C by lifting the tab member 31. From this perspective, it is preferable that it is attached to a position on the first portion 3C that is away from the hinge part 7 and also away from the center of the main body 2. That is, it is preferable that the tab member 31 is attached to a position closer to the tip of the first portion 3C.

[0335] In the first portion 3C, if the tab member 31 is joined at a position closer to the tip than the hinge part 7, the distance to the point of force application relative to the hinge part 7 (fulcrum) can be increased.

(Grip Part)

[0336] In the example of FIG. 43A, the tab member 31 is joined at one end 21A to the first portion 3C, and a grip part is formed at the other end 21B of the tab member 31. The grip part 24 is not particularly limited in shape or structure as long as it is formed in a size and shape that allows the tab member 31 to be pinched.

(Orientation of the Tab Member (Attachment Direction))

[0337] In the lid 1, in the example of FIG. 43A, the other end side of the tab member is positioned closer to the center of the main body than one end 21A of the tab member 31. However, this is just one example, and the orientation of the tab member may be in a direction other than that shown in the example of FIG. 43A. For example, the other end side of the tab member may be positioned to be directed outward from the main body, rather than one end of the tab member.

1-2 Operation and Effect

[0338] The lid 1 according to the seventh embodiment can be used by being joined to the edge 103 of the container 101, as shown in FIG. 44. Therefore, the lid 1 is formed to be capable of forming a joining region R that is joined to the edge 103 of the container 101 having an opening 102. The container 101 can preferably be used when it is formed such that the opening diameter decreases downward from the opening 102, i.e., it is formed in a tapered shape downward. Also, from the perspective of further strengthening the bonding force between the container 101 and the lid 1, it is preferable that the container has a flange part at the upper edge. It should be noted that these do not limit the shape of the container 101 to which the lid 1 can be attached. However, considering the stackability of the container, it is preferable that the container is also formed in a tapered shape toward the bottom part with respect to its outer peripheral surface. Also, in FIG. 43, the flange part has a planar structure extending outward, but the structure of the flange part is not limited to this. The shape of the flange part may have a structure with an outward curl.

[0339] According to the lid 1 of the seventh embodiment, the first portion 3C is formed to enable the formation of a downward displacement state, and with the lid 1 joined to the container 101, the guide part 6A is formed near the edge 102A of the opening 102 in a plan view of the lid 1. When the inner peripheral surface 104A of the container 101 is tapered toward the bottom part 106, as shown in FIG. 45, at least a part of the assumed region can be positioned outside the inner peripheral surface 104A of the container 101, or the assumed region can be made to contact the inner peripheral surface 104A of the container 101. However, the assumed region refers to the area through which the guide part 6A is expected to pass when the first portion 3C is pushed downward without causing bending in the first portion 3C. FIG. 45 is a plan view showing an example of a state where the main body 2 of the lid 1 forms a downward displacement state when the lid 1 is attached to the container 101.

[0340] Also, when a part of the assumed region is positioned outside the inner peripheral surface 104A of the container 101, and the first portion 3C is formed of a material with flexibility, such as a paper-based material, it is possible to form a state where the first portion 3C is displaced downward relative to the second portion 3E, causing bending in the first portion 3C while contacting the outer peripheral edge (the part corresponding to the guide part 6A) of the first portion 3C with the inner peripheral surface 104A of the container 101. Also, when the assumed region contacts the inner peripheral surface 104A of the container 101, it is possible to form a state where the outer peripheral edge (the part corresponding to the guide part 6A) of the first portion is in contact with the inner peripheral surface 104A of the container 101 when the first portion 3C is displaced downward relative to the second portion 3E. In such cases, as shown in FIG. 44 and FIG. 45, a part of the space 105 of the container 101, enclosed by the lower surface of the lid 1 (the side opposite to the exposed surface 70) and the inner peripheral surface 104A of the container 101, can be closed, forming a state where at least a part of the space 105 (partial space) of the container 101 is re-closed. It should be noted that a state where the first portion 3C is rotated upward relative to the second portion 3E (upward displacement state) and the outlet 6H is formed may be referred to as an open lid state. Also, a state where the first portion 3C is rotated downward (downward displacement state) and the partial space of the space 105 is generally closed (closed) (i.e., a state where a part of the space 105 is covered by the lid 1) is referred to as a closed lid state. A state where the open lid state is once formed and then becomes a closed lid state again (a state where the partial space of the space 105 is re-closed) is referred to as a re-closed lid state. In FIG. 44, as an example of the upward displacement state, the state where the first portion 3C is rotated in the +F direction is shown with a dashed line generally above the position indicated by the solid line for the first portion 3C. Also, in FIG. 44, as an example of the downward displacement state, the state where the first portion 3C is rotated in the F direction is shown with a dashed line generally below the position indicated by the solid line for the first portion 3C. This is also the case for FIG. 47.

[0341] In conventional lids and containers with lids, when a liquid such as a beverage is contained inside, the user would peel off the film material forming the lid to expose the mouth of the container in order to consume the contents of the container with the lid. In this case, even if one tries to cover the exposed mouth part again with the lid (sometimes referred to as a re-closed lid state), the state where the mouth is covered by the lid is easily undone. Furthermore, even if the mouth is closed with the lid, a large gap tends to form between the lid and the mouth, and in such cases, liquid tends to leak out from the gap between the lid and the mouth. Therefore, improvements have been sought for the lid in terms of enhancing the stability of the re-closed lid state when used with a container with a lid. In this regard, according to the lid of the present invention, it is possible to solve the conventional problems mentioned above, allowing for easy re-closing and ensuring sealing performance during re-closing.

[0342] Next, a modified example of the lid 1 according to the seventh embodiment will be described. The modified examples include those where additional structures are added to or removed from the embodiment of the lid 1 shown above.

1-3 Modified Examples

Modified Example 1

[0343] In the lid 1 according to the seventh embodiment, when the tab member 31 is provided, a locking portion may also be provided on the tab member 31. This form is referred to as Modification Example 1 of the seventh embodiment.

(Locking Portion)

[0344] The locking portion is a part that forms a locking structure that allows the position of the first portion 3C to be maintained when the first portion 3C is lifted in the lid 1. In the lid 1 according to Modification Example 1 of the seventh embodiment, the configuration of the locking portion is not particularly limited.

[0345] For example, the locking portion can be exemplified by the holding section 23 as shown in FIGS. 49A and 49B. The holding section 23 can be exemplified by a structure formed to protrude downward relative to the surface direction of the tab member 31. Here, the explanation will continue using the case where the locking portion is the holding section 23 as an example. It should be noted that this does not limit the lid 1 to having the locking portion as the holding section 23. The locking portion may have a structure that can regulate the displacement of the tab member 31 by being locked to a predetermined position of the lid 1 or the container 101.

(Holding Section)

[0346] The holding section 23 is preferably formed at a position between one end 21A and the other end 21B of the tab member 31. It can be exemplified by a structure configured to form a claw-like protruding portion when the tab member 31 is bent by making a cut line 23A in the tab member 31. The shape of the holding section 23 can be exemplified as triangular, but is not limited to this. For example, the shape of the holding section 23 can be arbitrarily adopted and used as a polygonal shape such as a semicircular or rectangular shape, or an elliptical shape.

(Locking Receiving Portion)

[0347] In Modification Example 1 of the seventh embodiment, a locking receiving portion may be provided in the second portion 3E. The locking receiving portion is formed in a shape that can receive the locking portion in the second portion. The position of the locking receiving portion may be determined according to the position of the locking portion. Regarding the formation position of the locking receiving portion, it is preferable that the locking receiving portion is formed at a position facing the locking portion when the tab member 31 is lifted to raise the first portion 3C, further folded over to the upper surface side of the second portion 3E, and then overlaid with the tab member 31 on the upper surface side of the second portion 3E (when an upward displacement state is formed).

[0348] The locking receiving portion is not particularly limited, but in the examples of FIGS. 49A and 49B, it is formed by a linear cut (insertion portion 26) formed at a predetermined position of the second portion. The insertion portion 26 is a cut portion that penetrates the main body 2 along the thickness direction of the main body 2. By inserting the holding section 23 into the insertion portion 26, the position of the tab member 31 is more easily maintained, and the upward displacement state is more easily maintained. It should be noted that the insertion portion 26 is an example of the locking receiving portion, and the configuration of the locking receiving portion is not limited to the insertion portion 26. For example, the holding section 23 may be hooked onto the edge portion located on the opposite side of where the locking portion is formed in the lid 1, or other configurations may be used.

Modification Example 2

[0349] In the lid 1 according to the seventh embodiment, at least a part of the hinge portion 7 is formed inside the outer peripheral edge of the joining region R (i.e., the outer edge 5D of the joining region corresponding portion 5) in a plan view of the lid 1, and in the example of FIG. 43A, the hinge portion 7 is formed inside the outer peripheral edge of the joining region R.

[0350] In the lid 1 according to the seventh embodiment, it is not limited to the example of FIG. 43A, and as shown in FIGS. 50A and 50B, at least one end of the hinge portion 7 (at least one of end 7A and end 7B) may be arranged to overlap the joining region R in a plan view of the lid 1. At this time, the other portions excluding the end of the hinge portion 7 overlapping the joining region R (at least one of end 7A and end 7B) may be formed in the inner portion 72D. This form is referred to as Modification Example 2 of the seventh embodiment. In Modification Example 2, the hinge portion 7 is formed inside the outer peripheral edge of the joining region R (the outer edge 5D of the joining region corresponding portion 5). In this case, for the guide portion 6A, as shown in FIG. 50A, a part of the guide portion 6A may be positioned inside the joining region R (inner portion 72D), or as shown in FIG. 50B, the guide portion 6A may be positioned in the joining region R.

[0351] According to Modification Example 2 of the seventh embodiment, for example, when the end 7A of the hinge portion 7 is located in the joining region R, and the end 7A of the hinge portion 7 is connected to the end 6D of the guide portion 6A, the end 6D of the guide portion 6A can be positioned in the joining region R. This allows the lid 1 to be in a downward displacement state when the lid 1 is attached to the container 101, thereby more reliably closing the partial space of the space portion 105 of the container 101 with the end 6D of the guide portion 6A when reclosing the container 101 with the lid 1. This is also the case when the end 7B of the hinge portion 7 is located in the joining region R, and the end 7B of the hinge portion 7 is connected to the end 6D of the guide portion 6A.

Modification Example 3

[0352] In the lid 1 according to the seventh embodiment, when the main body 2 is joined to the edge 103 of the container 101, at least one end of the hinge portion 7 (at least one of end 7A and end 7B) may be positioned outside the edge 102A of the opening 102 in a plan view of the main body 2 (in a plan view of the lid 1).

Modification Example 4

[0353] In the example of FIG. 43A, an example is shown where the guide portion 6A is formed inside the outer peripheral edge of the joining region R. The lid 1 according to the seventh embodiment is not limited to this, and a part of the guide portion 6A may be formed in the outer portion 72. This form is referred to as Modification Example 4 of the seventh embodiment. In Modification Example 4 of the seventh embodiment, a part of the guide portion 6A is formed in the inner portion 72D. In Modification Example 4 of the seventh embodiment, for example, as shown in FIG. 51B, a predetermined portion including the front end 6F of the guide portion 6A is formed in the outer portion 72, and the other portions of the guide portion 6A may be formed in the inner portion 72D. In this case, since a part of the guide portion 6A is formed in the outer portion 72, in a plan view of the lid 1, a part of the guide portion 6A can be positioned to overlap the joining region R, allowing a part of the first portion 3C to be positioned in the joining region R. This prevents the first portion 3C from rotating unintentionally even if the guide portion 6A has a cut structure.

Modification Example 5

[0354] In the lid 1 according to the seventh embodiment, when the main body 2 is joined to the edge 103 of the container 101, as shown in FIG. 51A, the separation distance between the joining region corresponding portion 5 and the guide portion 6A may be formed to gradually change from a position close to the hinge portion 7 (ends 6D, 6E) toward the front end 6F of the guide portion 6A. This form is referred to as Modification Example 5 of the seventh embodiment. In the lid 1 according to Modification Example 5 of the seventh embodiment, in a non-rotating state, in a plan view of the main body 2, the guide portion 6A is formed to be more separated from the portion corresponding to the joining region R as it is positioned further from the position where the hinge portion 7 and the guide portion 6A are connected (ends 6D, 6E) along the extending direction of the guide portion 6A.

[0355] According to the lid 1 of the seventh embodiment, when the main body 2 is joined to the edge 103 of the container 101, it becomes easier to form a state where the first portion 3C is more closely adhered to the inner peripheral surface 104A of the container 101 at the portion closer to the hinge portion 7 when the lid 1 is in a downward displacement state.

Modification Example 6

[0356] In the lid 1 according to the seventh embodiment, in the example of FIG. 43A, the position of the hinge portion 7 at the boundary portion 5A between the first portion 3C and the second portion 3E is arranged near the center of the main body 2, but the position of the hinge portion 7 may be different from near the center of the main body 2. However, when the lid 1 is joined to the edge 103 of the container 101, the position of the hinge portion 7 is determined so that the outer peripheral edge of the first portion 3C contacts the inner peripheral surface 104A of the container 101 when a lower displacement state is formed. The first portion 3C may be arranged at a position closer to the front end 6F of the guide portion 6A as shown in FIG. 52A. The first portion 3C may be arranged at a position further from the front end 6F of the guide portion 6A as shown in FIG. 52B.

[0357] Next, the eighth embodiment will be described.

2 Eighth Embodiment

2-1 Configuration

(Lid)

[0358] The lid 1 according to the eighth embodiment, as shown in FIGS. 46A and 46B, has a main body 2 similar to the seventh embodiment, and a joining region R is formed in the main body 2. Also, the lid 1 according to the eighth embodiment has an inner portion 72D and an outer portion 72 similar to the seventh embodiment. However, in the lid 1 according to the eighth embodiment, the tab member 31 described in the seventh embodiment may be omitted. In the description of the eighth embodiment, the configuration similar to the seventh embodiment will be omitted.

[0359] The lid 1 according to the eighth embodiment has a protruding portion 11 formed, and a part of the first portion 3C crosses the joining region R, and the part of the first portion 3C that crosses the joining region R is connected to the protruding portion 11.

(Protruding Portion)

[0360] The protruding portion 11 is a part that protrudes outward from a predetermined portion of the outer peripheral edge 2A of the main body 2. This protruding portion 11 is formed in a size and shape that can function as a knob to lift the first portion 3C when rotating the first portion 3C relative to the second portion 3E. For example, by pinching and lifting the tip 11A of the protruding portion 11 or its vicinity, the first portion 3C connected to the protruding portion 11 is lifted along with the displacement of the protruding portion 11, as will be described later.

(First Part and Second Part)

[0361] In the eighth embodiment, the main body 2 has a first part 3C and a second part 3E, with the first part 3C being formed to connect to the protrusion 11 as described above. The boundary 5a between the first part 3C and the second part 3E has a guide part 6A and a hinge part 7, similar to the seventh embodiment. However, unlike the seventh embodiment, the guide part 6A is formed to avoid crossing the area (intermediate region RV) between the protrusion 11 and the hinge part 7 in the main body 2. In the example of FIG. 46A, the guide part 6A includes a first guide part 60 with one end 6D as the base end, and a second guide part 61 with the other end 6E as the base end. The first guide part 60 extends in an arc from its base end (end 6D) away from the hinge part 7 towards the intermediate region RV, bends towards the protrusion 11 at a slightly outer position of the intermediate region RV, and extends to the outer peripheral edge of the main body 2 (outer peripheral edge 2A of the lid 1). The second guide part 61, similar to the first guide part 60, extends in an arc from its base end (end 6D) away from the hinge part 7 towards the intermediate region RV, bends towards the protrusion 11 at a slightly outer position of the intermediate region RV, and extends to the outer peripheral edge of the main body 2 (outer peripheral edge 2A of the lid 1). However, this is just an example, and the configuration of the first guide part 60 and the second guide part 61 is not limited to this example. In FIG. 46A, the intermediate region RV is shown as the area enclosed by a two-dot chain line. This is also the case for FIGS. 53A and 54A.

(First Part and Second Part)

[0362] In the eighth embodiment, the main body 2 has a first portion 3C and a second portion 3E, with the first portion 3C being formed to connect to the protrusion 11 as described above. The boundary section 5a between the first part 3C and the second part 3E has a guide section 6A and a hinge section 7, similar to the seventh embodiment. However, unlike the seventh embodiment, the guide section 6A is formed to avoid crossing the area (intermediate region RV) between the protruding section 11 and the hinge section 7 in the main body 2. In the example of FIG. 46A, as the guide part 6A, a first guide part 60 is formed with one end 6D of the guide part 6A as the base end, and a second guide part 61 is formed with the other end 6E of the guide part 6A as the base end. The first guide part 60 extends in an arc from its base end (end 6D) in a direction approaching the intermediate region RV, away from the hinge part 7, bends towards the protrusion 11 at a position slightly outside the intermediate region RV, and extends to the outer peripheral edge of the main body 2 (the outer peripheral edge 2A of the lid body 1). The second guide section 61, similar to the first guide section 60, extends in an arc from the base end (end 6D) of the second guide section 61 in a direction approaching the intermediate region RV away from the hinge section 7, bends towards the protrusion 11 at a position slightly outside the intermediate region RV, and extends to the outer peripheral edge of the main body 2 (outer peripheral edge 2A of the lid 1). However, this is an example, and the configuration of the first guide part 60 and the second guide part 61 is not limited to this example. In FIG. 46A, the interstitial region RV is indicated by the area enclosed by a two-dot chain line. This is also the case for FIGS. 53A and 54A.

[0363] For example, the first guide part 60 may extend in an arc from the end 6D away from the hinge part 7 towards the intermediate region RV, forming an end at a slightly outer position of the intermediate region RV. Similarly, the second guide part 61 may extend in an arc from the end 6D away from the hinge part 7 towards the intermediate region RV, forming an end at a slightly inner position of the intermediate region RV. In this case, when not in use, the second part 3E and the first part 3C are in a state of partial boundary loss, and the first part 3C is formed in accordance with the formation of the upward displacement state or downward displacement state (when the protrusion 11 is lifted to raise a part of the main body 2 along the guide part 6A, exposing the outlet 6H).

[0364] For example, the first guide part 60 may extend in an arc from the end 6D in a direction approaching the intermediate region RV away from the hinge part 7, and may form an end at a position slightly outside the intermediate region RV. The second guide part 61, like the first guide part 60, may also extend in an arc from the end 6D in a direction approaching the intermediate region RV, away from the hinge part 7, and form an end at a position slightly inside the intermediate region RV. In this case, when not in use, the second part 3E and the first part 3C are in a state where the boundary is partially lost, and in accordance with the formation of the upward or downward displacement state (when the protrusion 11 is lifted to raise a part of the main body 2 along the guide part 6A to expose the outlet 6H), the first part 3C is formed.

[0365] In the lid 1 according to the eighth embodiment, as in the seventh embodiment, the first part 3C is formed to enable the formation of a downward displacement state, as shown in FIGS. 47 and 48. FIG. 47 is a cross-sectional view showing an example when the lid 1 is attached to the container 101. FIG. 48 is a plan view showing an example of the state where the main body 2 of the lid 1 forms a downward displacement state when attached to the container 101.

[0366] In the lid 1 according to the eighth embodiment, as in the seventh embodiment, the first portion 3C is formed so as to enable the formation of a downward displacement state, as shown in FIGS. 47 and 48. FIG. 47 is a cross-sectional view showing an example when the lid 1 is attached to the container 101. FIG. 48 is a plan view showing an example of a state in which the main body 2 of the lid 1 forms a downward displacement state when the lid 1 is attached to the container 101.

2-2 Operation and Effect

[0367] The lid 1 according to the eighth embodiment can be used by being joined to the edge 103 of the container 101, similar to the seventh embodiment.

2-2 Function and Effect

[0368] The lid 1 according to the eighth embodiment can be used by being joined to the edge 103 of the container 101, similar to the seventh embodiment.

[0369] According to the lid 1 of the eighth embodiment, when in use (when joined to the edge 103 of the container 101), the first part 3C is raised relative to the second part 3E by lifting the protrusion 11. At this time, the first part 3C gradually rises relative to the second part 3E while rotating around the hinge part 7 as an axis, separating along the guide part 6A. At this time, in the lid 1 according to the eighth embodiment, an upward displacement state is formed.

[0370] According to the lid 1 of the eighth embodiment, when the lid 1 is in use (when it is used by being joined to the edge 103 of the container 101), the first part 3C is raised relative to the second part 3E by pulling up the protrusion 11. At this time, the first part 3C gradually rises while rotating relative to the second part 3E around the hinge section 7, generally along the guide section 6A, as the first part 3C and the second part 3E separate. At this time, in the lid 1 according to the eighth embodiment, an upward displacement state is formed.

[0371] According to the lid 1 of the eighth embodiment, as in the seventh embodiment, the first part 3C is formed to enable the formation of a downward displacement state. Also, when the lid 1 is joined to the container 101, the guide part 6A is formed near the edge 102A of the opening 102 in a plan view of the lid 1. Therefore, for example, when the first part 3C is displaced downward relative to the second part 3E, as shown in FIG. 48, it is possible to form a state where the outer peripheral edge of the first part 3C (the part corresponding to the guide part 6A) is in contact with the inner peripheral surface 104A of the container 101. Note that the protrusion 11 is connected to the first part 3C and can form a state in contact with the inner peripheral surface 104A of the container 101 while being given a bend or deformation to follow the first part 3C.

[0372] According to the lid 1 of the eighth embodiment, as in the seventh embodiment, the first portion 3C is formed to enable the formation of a downward displacement state. In the state where the lid 1 is joined to the container 101, the guide part 6A is formed in the vicinity of the edge 102A of the opening 102 in a plan view of the lid 1. For this reason, for example, when the first part 3C is displaced downward relative to the second part 3E, as shown in FIG. 48, it becomes possible to form a state where the outer peripheral edge of the first part 3C (the portion corresponding to the guide part 6A) is in contact with the inner peripheral surface 104A of the container 101. Additionally, the protrusion 11 is connected to the first part 3C, and while being provided with bending or deformation in shape to follow the first part 3C, it can form a state of being in contact with the inner peripheral surface 104A of the container 101.

[0373] Therefore, according to the lid 1 of the eighth embodiment, after forming an open lid state by forming an upward displacement state, a re-closed lid state can be formed.

[0374] Therefore, according to the lid 1 of the eighth embodiment, it is possible to form a re-closed state after forming an open state by creating an upward displacement state.

[0375] Next, a modified example of the lid 1 according to the eighth embodiment will be described.

[0376] Next, a modified example of the lid 1 according to the eighth embodiment will be described.

2-3 Modified Example

Modification 1

[0377] In the lid 1 according to the eighth embodiment, as shown in FIGS. 53A and 53B, a bending auxiliary part may be formed. Such a form is referred to as Modification 1 of the eighth embodiment.

Examples of Variations 2-3

Example of Transformation 1

[0378] In the lid 1 according to the eighth embodiment, as shown in FIGS. 53A and 53B, a bending aid portion may be formed. Such a form is referred to as Modification Example 1 of the eighth embodiment.

(Bending Auxiliary Part)

[0379] The bending auxiliary part 12 serves as a part that guides the position where the extension part rises relative to the first part 3C when forming a downward displacement state in the lid 1 joined to the edge 103 of the container 101.

Bending Assistance Section

[0380] The bending assistance section 12 serves as a guide for the position where the extension part rises relative to the first portion 3C when forming a downward displacement state in the lid 1, while the lid 1 is joined to the edge 103 of the container 101.

[0381] The bending auxiliary part 12 is formed at a position directed from the protrusion 11 towards the hinge part 7 (a position inside the intermediate region RV) and at a position inside the edge 102A of the opening 102 (a position closer to the center of the main body 2) when the main body 2 is joined to the edge 103 of the container 101 in a plan view. In the example of FIG. 53, the bending auxiliary part 12 has a notch structure, but it is not limited to this and may have a weakening structure.

[0382] The bending aid 12 is formed on the first portion 3C of the main body 2, in a position directed from the protrusion 11 toward the hinge portion 7 (a position inside the intermediate region RV), and also in a position inside the edge 102A of the opening 102 (a position closer to the center of the main body 2), when the main body 2 is joined to the edge 103 of the container 101 in a plan view. The bending aid section 12, in the example of FIG. 53, has a notch structure, but is not limited to this and may have a weakening structure.

Modification 2

[0383] In the lid 1 according to the eighth embodiment, a locking part may be provided on the protrusion 11. The locking part may be configured similarly to the locking part described in Modification 1 of the seventh embodiment. For example, as shown in FIGS. 54A and 54B, the locking part may be a holding part 23. The holding part 23 may be formed similarly to the holding part 23 described in Modification 1 of the seventh embodiment. However, it is preferable that the direction in which the holding part 23 protrudes is opposite to that of the protrusion 11.

Modification Example 2

[0384] In the lid 1 according to the eighth embodiment, a locking portion may be provided on the protrusion 11. The locking portion may be configured similarly to the locking portion described in Modification Example 1 of the seventh embodiment. For example, the locking portion may be the holding portion 23, as shown in FIGS. 54A and 54B. The holding section 23 may be formed similarly to the holding section 23 described in Modification Example 1 of the seventh embodiment. However, it is preferable that the direction in which the holding section 23 protrudes is opposite to that of the protruding section 11.

(Locking Receiving Part)

[0385] In Modification 2 of the eighth embodiment, a locking receiving part may be provided in the second part. The locking receiving part may be configured similarly to the locking receiving part described in Modification 1 of the seventh embodiment. For example, as shown in FIGS. 54A and 54B, the locking receiving part may be an insertion part 26. The insertion part 26 may be formed similarly to the insertion part 26 described in Modification 1 of the seventh embodiment. However, it is preferable that the position where the insertion part 26 is formed is a position where it can be aligned with the holding part 23 when the first part 3C is folded back to face the second part 3E with the hinge part 7 as an axis. This includes cases where the insertion part 26 and the holding part 23 can be aligned with each other when the first part 3C is bent.

Locking Receiving Part

[0386] In the second variation of the eighth embodiment, a locking receiving portion may be provided in the second part. The locking receiving portion may be configured similarly to the locking receiving portion described in Modification Example 1 of the seventh embodiment. For example, the locking receiving part may be the insertion part 26 as shown in FIGS. 54A and 54B. The insertion part 26 may be formed similarly to the insertion part 26 described in the first modification of the seventh embodiment. However, it is preferable that the position where the insertion portion 26 is formed is such that when the first portion 3C is folded back around the hinge portion 7 to face the second portion 3E, it can be aligned with the holding portion 23. In cases where it is possible to align with the holding part 23, it may also include situations where the insertion part 26 and the holding part 23 can be aligned while the first part 3C is bent.

3 Ninth Embodiment

3-1 Configuration

(Lid)

[0387] The lid 1 according to the ninth embodiment, as shown in FIGS. 55A and 55B, has a low adhesion region RPE formed in the joining region R of the main body 2, and the guide part 6A is formed to avoid crossing the area (intermediate region RV) between the low adhesion region RPE and the hinge part 7, and is formed similarly to the lid 1 according to the eighth embodiment except for the omission of the protrusion 11. In the example of FIG. 55A, the low adhesion region RPE is shown as the area enclosed by a one-dot chain line.

3 Ninth Embodiment

3-1 Configuration

Lid

[0388] The lid 1 according to the ninth embodiment, as shown in FIGS. 55A and 55B, has a low adhesion region RPE formed in the joining region R on the main body 2, and a guide part 6A is formed to avoid crossing the region (intermediate region RV) between the low adhesion region RPE and the hinge part 7, and is formed similarly to the lid 1 according to the eighth embodiment, except that the protrusion 11 is omitted. In the example of FIG. 55A, the low adhesion region RPE is indicated by the area enclosed by a dashed line.

(Joining Region)

[0389] The lid 1 according to the ninth embodiment has a low adhesion region RPE formed in the joining region R of the main body 2. The low adhesion region RPE is identified as a part with lower adhesion (easily peelable part) when comparing the adhesion of the outside of the low adhesion region RPE and the adhesion of the low adhesion region RPE in the joining region R.

Junction Area

[0390] In the ninth embodiment, the lid 1 has a low-adhesion region RPE formed in the bonding area R of the main body 2. The low adhesion region RPE is identified as the part with lower adhesion (easily peelable part) when comparing the adhesion outside the low adhesion region RPE with the adhesion of the low adhesion region RPE in the bonding region R.

(Guide Part)

[0391] The guide part 6A is formed to avoid crossing the area (intermediate region RV) between the low adhesion region RPE and the hinge part 7. This can be realized by forming the first guide part 60 and the second guide part 61 as described in the eighth embodiment. In the examples of FIGS. 55A and 55B, both the first guide part 60 and the second guide part 61 bend slightly inside the intermediate region RV and extend towards the outer edge 71C of the main body 2, crossing the low adhesion region RPE. However, this is just an example, and the configuration of the guide part 6A is not limited to FIGS. 55A and 55B. In the example of FIG. 55A, the intermediate region RV is shown as the area enclosed by a two-dot chain line.

Internal Draft

[0392] The guide part 6A is formed to avoid crossing the region (intermediate region RV) between the low adhesion region RPE and the hinge part 7. This can be realized, for example, by forming the first guide part 60 and the second guide part 61 as the guide part 6A, as described in the eighth embodiment. In the examples of FIGS. 55A and 55B, both the first guide section 60 and the second guide section 61 bend slightly inward of the intermediate region RV and extend towards the outer edge 71C of the main body 2, crossing the low adhesion region RPE. However, this is merely an example, and the configuration of guide section 6A is not limited to those shown in FIGS. 55A and 55B. In the example of FIG. 55A, the interstitial region RV is indicated by the area enclosed by a two-dot chain line.

3-2 Operation and Effect

[0393] The lid 1 according to the ninth embodiment can be used by being joined to the edge 103 of the container 101, similar to the eighth embodiment. In the lid 1 according to the ninth embodiment, by using the outer region of the low adhesion region RPE as a pinching part instead of the protrusion 11 described in the eighth embodiment, the upward displacement state and downward displacement state can be formed as described in the eighth embodiment. Then, according to the lid 1 of the ninth embodiment, a re-closed lid state can be formed similarly to the eighth embodiment.

3-2 Function and Effect

[0394] The lid 1 according to the ninth embodiment can be used by being joined to the edge 103 of the container 101, similar to the eighth embodiment. In the lid 1 according to the ninth embodiment, instead of the protrusion 11 described in the eighth embodiment, the area outside the low adhesion region RPE of the outer portion 72 is used as a gripping part, thereby forming the upward displacement state and the downward displacement state as described in the eighth embodiment. And according to the lid 1 pertaining to the ninth embodiment, it is possible to form a re-closure state similar to the eighth embodiment.

4 Application Example

[0395] The lid 1 according to the seventh to eighth embodiments can be used in a container 150 with a lid, as shown in FIGS. 44 and 47. FIGS. 44 and 47 are cross-sectional views showing examples where the lid 1 according to the seventh and eighth embodiments is joined to the edge 103, which is the outer part from the edge 102A of the opening 102 of the container 101 with an opening 102.

4 Application Examples

[0396] The lid 1 according to the seventh to eighth embodiments can be used for the container with a lid 150, as shown in FIGS. 44 and 47, etc. FIGS. 44 and 47 are cross-sectional views showing examples in which the lid 1 according to the seventh embodiment and the eighth embodiment is joined to the edge 103, which is the outer part from the edge 102A of the opening 102 of the container 101 having the opening 102. The container 150 with a lid has a joint 151 where the container 101 and the lid 1 are joined, and the area of the lid 1 forming the joint 151 becomes the joint region R. The method of joining the lid 1 and the container 101 is not particularly limited and can be appropriately used with joining methods such as crimping or heat sealing. Below, the use of the lid 1 according to the seventh embodiment in the container 150 with a lid will be explained as an example.

[0397] In the example shown in FIG. 44, the container 101 has a cylindrical side wall 104 that widens upward (tapers downward) and a bottom part 106, forming a space 105 inside, and a container body 110 with an opening 102 at the upper end (upper end of the side wall 104). Although not shown, the opening 102 of the container 101 is formed in a circular shape. However, the container 101 shown here is just an example and does not limit the configuration of the container 101. For example, the container 101 may have the opening 102 formed in a rectangular shape. The container 101 may be any that can cover the opening 102 with the lid 1. Also, what is stored inside the container 101 (space 105) is not particularly limited and can include, for example, liquids, solids, or combinations thereof.

[0398] In the container shown in FIG. 44, the edge 103 formed from the outer part of the edge 102A of the opening 102 has a flange part 108. The flange part 108 may be a curled part where the member forming the container body 110 is wound outward, as shown in FIGS. 44 and 47, or it may be formed as a part extending outward on a plane (flange part).

[0399] Also, the lid 1 according to the seventh embodiment may be combined with the container 101 having the opening 102.

[0400] Moreover, as shown in FIGS. 64 and 65, it is preferable to configure it so that when the first part 3C is opened, water droplets adhering to the back side of the first part 3C can flow into the container. Such a configuration may involve inserting the holding part 23 formed on the tab member 31 into the hole-shaped holding receiving part 26 formed on the knob part from below, as shown in FIG. 64, to maintain the first part 3C in an open state, with the open part of the first part 3C being horizontal, or with the end side where the tab member is attached to the first part 3C in the lid 1 as the upper end, it is preferable to configure it to slope downward from the upper end toward the center of the lid. By arranging the first part 3C in this way, it is possible to let water droplets adhering to the back surface of the lid flow into the container when opening, and when operating the lid, for example, when the user tries to close the first part 3C that was once opened, it is possible to greatly reduce the chance of wetting or soiling the hands with water droplets adhering to the back surface of the lid. Also, at this time, it is more preferable to form a guide part 500 on the lid to guide the water droplets to flow more smoothly into the container. The shape of the guide part 500 can be variously considered, for example, by forming a streak-like guide part 500 in advance by embossing or the like during the molding of the lid 1, or by performing predetermined processing to make the lid easier to bend when the user tries to open it. Also, when resealing the first part 3C after opening it once, it is preferable to adopt a shape such as the wave shape 501 shown in FIG. 67 along at least part of the contour of the first part 3C to make it easier to maintain the resealed state. By adopting such a shape, it becomes easier for the first part 3C to catch, making it easier to maintain the state after resealing.

[0401] The matters shown in the above [4 Application Example] are not limited to the case of using the lid 1 according to the seventh embodiment and can also be applied to the case of using the lid 1 according to the eighth embodiment as shown in FIG. 47. Also, the matters shown in [4 Application Example] may be similarly applied to the ninth embodiment.

[0402] Next, the tenth to thirteenth embodiments of the lid according to the present invention will be described in detail with reference to the drawings.

1 Tenth Embodiment

1-1 Configuration

(Container with Lid)

[0403] The container 150 with a lid according to the tenth embodiment includes a container 101 and a lid 1 attached to the container 101. The container 150 with a lid also has a joint 50 for joining the container 101 and the lid 1. In the tenth embodiment, the case where a separate tab member 31 is provided on the small lid part 3 of the lid 1 is explained as an example, but this is just one example and does not exclude cases where no tab member is provided on the small lid part. Also, the tab member is not limited to being provided separately from the small lid part, and the part corresponding to the tab member may be integrally formed with the small lid part. In the explanation of the tenth embodiment, the case where the shape of the container 101 is circular in the cross-section of the container 101 in a plan view of the container 150 with a lid is used as an example, but the shape of the container 101 is not limited to this and may be rectangular, polygonal, or a combination of curves and straight lines in the cross-section of the container 101.

(Lid)

[0404] The lid 1 is used by being joined to the container 101 along the edge 103, which will be described later. In the example of FIG. 56A, the shape of the outer peripheral contour of the lid 1 is generally circular in plan view, but it is not limited to this and may be rectangular or elliptical, for example. The lid 1 is formed in a shape that can cover at least part of the opening 102, which will be described later, of the container 101. In the example of FIG. 56A, the lid 1 is formed to cover the entire area of the opening 102 when the small lid part 3 closes the small opening 6 (the area of the small opening 6 is generally covered by the small lid part 3). When covering the entire area of the opening 102, it may include cases where the opening 102 is completely covered or where fine hole structures such as small holes, slits, or notches with specific functions to release air from the container to the outside are formed in the main body or small lid part of the lid 1.

[0405] The lid 1 includes a main body 2 having a small opening 6 and a small lid part 3 covering the small opening 6. Also, as shown in the example of FIG. 56A, the lid 1 may be provided with a tab member 31 connected to the small lid part 3. In the lid 1, the opening forming part 4 is formed by the small lid part 3 and the small opening 6.

(Main Body)

[0406] The main body 2 has a part forming the joint 50, which will be described later, and is connected to the small lid part 3 via a hinge part 7. In the example of FIG. 56A, it is preferable that the main body 2 is connected to the small lid part 3 by a connection structure 17 that connects the edge of the small opening 6 of the main body 2 and the edge of the small lid part 3, in addition to the hinge part 7, before lifting the small lid part 3 to form the small opening 6. The structure of the connection structure 17 is such that the edge of the small opening 6 of the main body 2 and the edge of the small lid part 3 are locally connected at a predetermined position along the longitudinal direction of the part where they face each other. The connection structure 17 may be a perforated structure as shown in FIG. 56B (in FIG. 56B, an alternating arrangement structure of the cut part 18B and the connection structure 17) or a half-cut part 16 as shown in FIG. 58. In this case, the half-cut part 16 may be formed along the edge of the small opening 6 of the main body 2 over the entire area of the edge of the small opening 6 (the part forming the outer peripheral edge 3A) or may be formed locally.

(Opening Forming Part)

[0407] As shown in FIG. 56A, the opening forming part 4 is defined as the part where the small opening 6 opens and closes with the displacement of the small lid part 3. The opening forming part 4 is defined as the part having the small opening 6 and the small lid part 3. The opening forming part 4 is formed so that, as shown in FIG. 56, it is in a state where the small lid part 3 closes the small opening 6 and in a state where the small lid part 3 is displaced and the small opening 6 is open. The opening forming part 4 is formed at a position offset from the center CT to a predetermined position in the direction outward (outward direction) from the center CT of the lid 1.

[0408] The opening forming part 4 is configured so that when the small lid part 3 is opened with the lid 1 attached to the container 101, the space 105 of the container 101 can be viewed through the small opening 6.

(Small Opening)

[0409] The small opening 6 is formed to penetrate the opposing surface 73A of the lid 1 to the container 101 and the non-opposing surface (exposed surface 70 of the lid 1) to the container 101. The small opening 6 is formed to have a smaller opening area than the opening 102 on the inside of the part corresponding to the joint 50 in a plan view of the lid 1. The small opening 6 is for forming an opening for the entry and exit of contents (such as beverages or food) in the space 105 of the container 101 in the container 150 with a lid. When the small lid part 3 is lifted relative to the main body 2, the small opening 6 is exposed.

(Small Lid Part)

[0410] The lid 1 is provided with a small lid part 3. The small lid part 3 covers the small opening 6 in a manner that allows it to open and close. In the example of FIG. 56, the small lid part 3 is formed to be displaceable to a lifted state relative to the main body 2, and the small opening 6 is formed when the small lid part 3 is lifted.

[0411] In the lid 1 shown in the example of FIG. 56, the small lid part 3 is provided on the inside (center CT side) relative to the part corresponding to the joint 50 in a plan view of the lid 1. In the example shown in FIG. 56, the small lid part 3 is displaced (rotated) so that it is in a lifted state in conjunction with the movement of the tab member 31 joined to the small lid part 3 at the tab joint 18. The main body 2 and the small lid part 3 are connected by a hinge part 7. As the small lid part 3 is lifted with the hinge part 7 as the pivot, the small opening 6 is exposed. In the example of FIG. 56, in the plan view of the lid 1, the portion forming the exposed surface 70 of the lid 1, excluding the small lid portion 3, becomes the main body 2.

[0412] The shape and structure of the small lid portion 3 are not particularly limited. Additionally, it is preferable that the shape of the small lid portion 3, as shown in FIG. 56, has a contour shape where at least part of the outer peripheral edge 3A of the small lid portion 3 extends along the portion corresponding to the joint 50 (the portion forming the joint 50). In the example of FIG. 56, the shape of the front edge portion 75A of the outer peripheral edge 3A of the small lid portion 3 is shaped along the inner end of the joint region R. Also, at this time, the shape of the front edge portion 75A tends to be shaped along the inner end of the edge portion 103. Such a shape of the small lid portion 3 may be applied to the small lid portion 3 of the lid 1 according to the tenth embodiment. Hereinafter, in the description of the lid 1, unless otherwise specified, the explanation will continue using the case where the small lid portion 3 as shown in FIG. 56 is used as an example. In the example of the small lid portion 3 shown in FIG. 56, the outer peripheral edge 3A is composed of the front edge portion 75A and the side edge portion 76 connecting the front edge portion 75A and the hinge portion 7.

[0413] The outer peripheral edge 3A of the small lid portion 3 may be connected to the main body 2 by the connection structure 17 as described above.

[0414] In the lid 1 according to the tenth embodiment, even after the small lid portion 3 is raised and the small opening 6 is exposed, the small opening 6 can be covered by the small lid portion 3. When the small lid portion 3 is raised, the small opening 6 is exposed. This state is called the open lid state. The state where the small opening 6 is covered by the small lid portion 3 is called the closed lid state.

[0415] In the lid 1, it is possible to be in a closed lid state even after being in an open lid state, and when in a closed lid state, the end face (outer peripheral end face) of the outer peripheral edge 3A of the small lid portion 3 can face the end face formed at the position of the small opening 6 of the main body 2.

(Hinge Portion)

[0416] As described above, the lid 1 is formed with a hinge portion 7, and the hinge portion 7 connects the small lid portion 3 to the main body 2 in a rotatable manner. The hinge portion 7 may be a perforated structure or a half-cut portion similar to the connection structure 17.

(Tab Member)

[0417] The tab member 31 has a knob portion 24 formed in the portion including the other end portion 16B, as shown in the example of FIG. 56.

[0418] In the example of FIG. 56, the tab member 31 is joined to the small lid portion 3 at one end portion 16A of the tab member 31, and this joining forms the tab joint 18. The position of the portion corresponding to the tab joint 18 in the small lid portion 3 is not limited, but in the example of FIG. 56, the tab joint 18 is joined to the portion closer to the tip of the small lid portion 3 (near the one end portion 14A).

(Joint Portion)

[0419] In the container 150 with a lid, the joint portion 50 is formed as the portion where the lid 1 and the container 101 are joined. The joint portion 50 has at least a wide portion 51 and a narrower portion 52, which are parts with different widths. The width of the joint portion 50, in the plan view of the lid 1, indicates the size of the joint portion 50 in the direction perpendicular to the longitudinal direction (arrow F direction) and along the surface direction of the main body 2 (H1, H2 in FIGS. 56, 58 to 61).

[0420] The portion defined as the relatively wider part of the joint portion is specified as the wide portion 51 (width H1), and the portion excluding the wide portion 51 (the part with a width equal to or less than the width of the wide portion 51 (width H2)) is defined as the narrower portion 52. The boundary position between the wide portion 51 and the narrower portion 52 is defined as being included in the wide portion 51. Therefore, if the joint portion 50 gradually narrows from the wide portion 51 to the narrower portion 52, the gradually narrowing portion is considered to be included in the wide portion 51. The joint portion 50 is in a state where the narrower portion 52 is connected to the two ends along the longitudinal direction (arrow F direction) of the wide portion 51. This allows the force loaded near the boundary between the wide portion 51 and the narrower portion 52 to be released towards the narrower portion.

(Arrangement of the Wide Portion and the Small Lid Portion)

[0421] In the container 150 with a lid, the arrangement of the wide portion 51 and the small lid portion 3 satisfies the following condition 1. [0422] Condition 1: In the state where the small opening is covered by the small lid portion, in the plan view of the lid, assuming a half-line intersecting the wide portion from the center of the lid, at least one half-line intersects the small lid portion.

[0423] In the example of FIG. 56, at least the half-line MI intersecting the wide portion 51 from the center of the lid passes through the presence area of the small lid portion 3, that is, it intersects the small lid portion 3. The half-line MI is a half-line intersecting at a slightly offset position along the longitudinal direction F of the wide portion 51 from the center CL of the wide portion 51.

(Container)

[0424] The container 101 has a cylindrical side wall portion 107 and a bottom portion 106 that increase in diameter upward, forming a space portion 105 inside, and an opening 102 opened at the upper end of the main body (upper end of the side wall portion 107). Not shown, but the opening 102 of the container 101 is surrounded by an edge portion 103, and the edge portion 103 is formed in a circular shape. However, the container 101 shown here is an example and does not limit the configuration of the container 101. For example, the container 101 may have the edge portion 103 formed in a rectangular shape. The container 101 may be any that can cover the opening 102 with the lid 1. Also, what is stored inside the container 101 is not particularly limited, and examples include liquid, solid, or combinations thereof.

[0425] In the container 101 shown in FIG. 57, a curl portion 109 is formed on the edge portion 103 by winding a member forming the main body portion 101A of the container 101 outward, but the container 101 is not limited to this. The end face of the side wall portion 107 may be exposed on the edge portion 103, or a flange portion extending outward from the opening 102 of the container 101 may be formed on the edge portion 103.

1-2 Manufacturing Method

[0426] The container 150 with a lid can be manufactured by placing the lid 1 over the opening 102 of the container 101 and joining the lid 1 and the container 101 to form the joint portion 50. The method of joining the lid 1 and the container 101 is not particularly limited and can be appropriately used with joining methods such as crimping or heat sealing.

1-3 Operation and Effect

[0427] According to the container 150 with a lid according to the tenth embodiment, the joint portion 50 has parts with different widths, and at least one half-line connecting the wide portion 51 and the center of the lid 1 intersects the small lid portion in the plan view of the lid. This makes it easier to form a state where the wide portion is located near at least part of the small lid portion and the small opening, strengthening the vicinity of the small lid portion and the small opening, while the strength of the parts distant from the small lid portion and the small opening becomes relatively less strong. Therefore, when the small lid portion is pinched and lifted, even if force is applied to the small lid portion, the shape of the small opening can be easily stabilized by the wide portion. Additionally, it becomes easier to release the force applied to the small lid portion to the narrower portion.

2 Eleventh Embodiment

[0428] In the description of the tenth embodiment, the container with a lid was provided with a tab member 31. The tab member 31 is not limited to what was described in the tenth embodiment. As shown in FIG. 59, in the container with a lid according to the tenth embodiment, a fixing structure forming portion 23 that detachably fixes the tab member 31 when the small lid portion 3 is lifted by the tab member 31 may be provided. Hereinafter, this embodiment will be referred to as the eleventh embodiment. FIG. 59 is a schematic plan view showing an example of a lid used in the container with a lid according to the eleventh embodiment.

(Fixing Structure Forming Portion)

[0429] The fixing structure forming portion 23 is not particularly limited as long as it is a structure that can detachably fix the position of the tab member 31 when the tab member 31 is lifted. For example, in the example of FIG. 59, the fixing structure forming portion 23 is formed by the claw portion 23B and the receiving portion 20. The claw portion 23B is a part that protrudes downward by bending the knob portion. Additionally, the receiving portion 20 is formed in a slit shape in the main body 2. The receiving portion 20 is formed at a position facing the claw portion 23B when the small lid portion 3 is lifted and the tab member 31 is positioned on the main body 2.

(Operation and Effect)

[0430] According to the container 150 with a lid according to the eleventh embodiment, the provision of the fixing structure forming portion 23 allows the state where the small lid portion 3 is lifted to form the small opening 6 to be maintained.

3 Twelfth Embodiment

[0431] In the container with a lid according to the tenth embodiment, in addition to condition 1 shown in the tenth embodiment, as shown in FIG. 60, the arrangement of the wide portion 51 and the small lid portion 3 may satisfy condition 2 described later. Hereinafter, this embodiment will be referred to as the twelfth embodiment. FIG. 59 is a schematic plan view showing an example of a lid used in the container with a lid according to the twelfth embodiment.

[0432] Regarding the arrangement of the wide portion 51 and the small lid portion 3, condition 2 is as follows. [0433] Condition 2: In the state where the small opening is covered by the small lid portion, in the plan view of the lid, the center of the hinge portion is formed at a position deviated from the line passing through the center of the wide portion along the longitudinal direction of the wide portion from the center of the lid among the half-lines.

[0434] In the example shown in FIG. 60, in the plan view of the lid 1, the center HP of the hinge portion is formed at a position deviated from the line (half-line MCL) passing through the center CL of the wide portion 51 along the longitudinal direction of the wide portion 51 from the center CT of the lid among the half-lines. Note that the center HP of the hinge portion 7 indicates the intermediate position of the two ends 7A, 7B of the hinge portion 7.

(Operation and Effect)

[0435] According to the container 150 with a lid according to the 12th embodiment, the center CT of the hinge part 7 is offset from the half-line MCL, allowing the separation distance of the center CL of the wide part 51 from one end 7A of the hinge part 7 to differ from the separation distance of the center CL of the wide part 51 from the other end 7B. For example, it can be arranged such that end 7B is closer to the center CL of the wide part 51, and end 7A is farther away. In this case, when lifting the small lid part 3, the shape of end 7A becomes more variable than end 7B, allowing the formation of parts of the small lid part 3 that are easier to lift and parts that are relatively harder to lift, making it easier to lift the small lid part 3 gradually and partially rather than all at once.

4 13th Embodiment

[0436] In the container with a lid of the 10th embodiment, as shown in FIG. 61, the joint part 50 may be formed with multiple wide parts 51 and narrow parts 52. This embodiment is referred to as the 13th embodiment. FIG. 61 is a schematic plan view showing an example of a lid used in the container with a lid according to the 13th embodiment.

[0437] Next, the 14th embodiment of the lid according to the present invention will be described.

(Lid)

[0438] The lid 1 is used by being joined along the edge 103 of the opening 102 of the container 101. The lid 1 is formed in a shape that covers the opening 102 when joined to the opening 102 of the container 101. As shown in FIG. 62, the lid 1 has a joining region R that is joined to the edge 103 of the opening 102 of the container 101. FIG. 62 shows an example of the lid 1.

(Joining Region)

[0439] The joining region R is an area formed annularly along the opening 102 in a shape corresponding to the opening 102 of the container 101. The width W of the joining region R (width along the inner and outer direction) is usually the same as or narrower than the width of the edge 103 of the opening 102. However, this does not prohibit the width W of the joining region R from being wider than the width of the edge 103 of the opening 102. Additionally, the joining region R may be formed inside the outer peripheral edge 71D of the lid 1, or it may be formed up to the outer peripheral edge 71D of the lid 1 as shown in FIG. 62. FIG. 62 is a plan view showing an example of the lid 1.

[0440] The lid 1 includes a main body 2 having a small opening 6, a small lid piece 13 covering the small opening 6, and a tab member 31. In the lid 1, the small lid piece 13 and the small opening 6 form the opening forming part 4.

(Opening Forming Part)

[0441] As shown in FIG. 62, the opening forming part 4 includes the small opening 6 and the small lid piece 13 as described above. The opening forming part 4 is formed such that the small lid piece 13 and the small opening 6 are in a state where the small lid piece 13 closes the small opening 6, and in a state where the small lid piece 13 is open and the small opening 6 is open, as shown in FIG. 62. The opening forming part 4 is provided at a position offset to a predetermined position in the direction from the central part of the lid 1 to the outside.

[0442] When the small lid piece 13 is opened with the lid 1 attached to the container 101, the opening forming part 4 allows the space part 105 of the container 101 to be visible through the small opening 6.

(Opening)

[0443] The small opening 6 constituting the opening forming part 4 is formed to penetrate the opposing surface of the lid 1 to the container 101 and the non-opposing surface of the lid 1 to the container 101 (exposed surface 70 of the lid 1). The small opening 6 is intended to form an opening for the entrance and exit of contents (such as beverages or food) in the space part 105 of the container 101 when the lid 1 is attached to the container 101. In the lid 1, the small opening 6 is formed to be exposed when the small lid piece is lifted.

(Small Lid Piece)

[0444] The lid 1 is provided with a small lid piece 13. The small lid piece 13 is formed to be displaceable to a lifted state relative to the main body, and in the lid 1, the small opening 6 is formed when the small lid piece 13 is lifted.

[0445] In the lid 1 shown in the example of FIG. 62, the small lid piece 13 is provided in a region corresponding to the inside of the joining region R on the exposed surface 70 of the lid 1 in a plan view (with the vertical direction as the line of sight), hereinafter simply referred to as the inside region of the joining region R or the inner region Rn. The small lid piece 13 is connected to the main body 2 including the joining region R. As shown in FIG. 62, in the lid 1, the small lid piece 13 is displaced so that it is in a lifted state in conjunction with the movement of the tab member 31 joined to the small lid piece 13 at the first joint 210A. The small lid piece 13 uses the connecting part between the main body 2 and the small lid piece 13 as a hinge part, and as the small lid piece 13 is lifted with the connecting part as the support axis, the small opening 6 is exposed. The small lid piece 13 is provided inside the joining region R in a plan view of the lid 1. Hereinafter, the connecting part (hinge part) that serves as the support axis when the small lid piece 13 is lifted is referred to as the hinge connecting part 74 among the outer peripheral edge 3A of the small lid piece 13. The main body 2 is composed of the part excluding the small lid piece 13 among the parts forming the exposed surface 70 of the lid 1 in a plan view.

[0446] The shape and structure of the small lid piece 13 are not particularly limited. Additionally, it is preferable that the shape of the small lid piece 13 has a contour shape such that at least a part of the outer peripheral edge 3A of the small lid piece 13 extends along the inner edge of the joining region R, as shown in FIG. 62. In the example of FIG. 62, the shape of the front edge part 75A of the outer peripheral edge 3A of the small lid piece 13 is along the inner edge of the joining region R. At this time, the shape of the front edge part 75A tends to be along the inner edge of the edge 103 of the opening 102. Such a shape of the small lid piece 13 may be applied to the small lid piece 13 of the lid 1 according to the first embodiment. Hereinafter, in the description of the lid 1, unless otherwise specified, the explanation will continue using the case where the small lid piece 13 as shown in FIG. 62 is used as an example. In the example of the small lid piece 13 shown in FIG. 62, the outer peripheral edge 3A is composed of the front edge part 75A, the hinge connecting part 74, and the side edge part 76 connecting the front edge part 75A and the hinge connecting part 74.

[0447] The outer peripheral edge 3A of the small lid piece 13, excluding the hinge connecting part 74, may form a cut part in a state of being cut relative to the main body 2, or it may form a fragile part in a partially joined state. The cut part can be formed by providing a score line along the boundary between the small lid piece 13 and the main body 2. The fragile part can be formed by providing a structure (perforation structure) in which short score lines and point-like joints are alternately arranged at the boundary between the small lid piece 13 and the main body 2, or by forming a half-cut structure as shown in the example of FIG. 62. The half-cut structure can indicate a structure cut to a predetermined depth in the thickness direction of the lid 1. At this time, it is preferable that the depth of the cut in the half-cut structure is more than half of the thickness of the lid 1 and less than the thickness of the lid 1. The hinge connecting part 74 may also be a fragile part.

[0448] In the lid 1 according to this embodiment, even after the small opening 6 is exposed by lifting the small lid piece 13, it can be in a state where the small opening 6 is covered by the small lid piece 13. When the small lid piece 13 is lifted, the small opening 6 is exposed. This state is called the open lid state. The state where the small opening 6 is covered by the small lid piece 13 is called the closed lid state.

[0449] In the lid 1, as shown in FIG. 62, it is possible to be in a closed lid state even after being in an open lid state, and when in a closed lid state, the end face 73a (outer peripheral end face) of the outer peripheral edge 3A of the small lid piece 13 can face the end face formed at the position of the small opening 6 of the main body 2. At this time, the part of the end face of the main body 2 facing the end face 73a of the outer peripheral edge 3A of the small lid piece 13 becomes the facing surface. In the lid 1 according to the 14th embodiment, it is preferable that the end face 73a of the outer peripheral edge 3A and the facing surface contact each other to form a contact part. In this case, in the lid 1, a state where the small opening 6 is securely covered at the contact part can be formed in the closed lid state. However, in the lid 1, since a part where the small lid piece 13 and the main body 2 are separated is generated when in an open lid state, breathability can be ensured, and it is possible to allow steam to pass between the small lid piece 13 and the main body 2.

(Tab Member)

[0450] The tab member 31 has a first part 210 that joins to the small lid piece 13 and a second part 211 that can be joined to the main body when the small lid piece 13 is lifted.

[0451] In the example of FIG. 62, the first part 210 is one end part 21a of the tab member 31. The part of the small lid piece 13 to which the first part 210 is joined is not limited, but in the example of FIG. 62, the first part 210 is joined to the part closer to the tip of the small lid piece 13 (position near one end part 13a).

[0452] The second part 211 is a part closer to the other end part 21b side than the first joint 210A in the tab member. It is preferable that the tab member forms a knob part 24 in the part including the other end part 21b as shown in the example of FIG. 62. In this case, it is preferable that the second part 211 is formed on the one end part 21A side rather than the knob part 24. The second part 211 is formed to be joinable to the main body 2, and the position of the second part 211 is such that it can be joined to the main body when the small lid piece 13 is lifted. The second part 211 may be at a position away from the first part 210, or it may be in contact with the boundary.

[0453] Additionally, from the viewpoint of accommodating the tab member 31 within the exposed surface 70 of the lid 1 in a plan view, as shown in the example of FIG. 62, it is preferable that the tab member 31 is arranged such that the second part 211 is positioned more toward the center side of the lid 1 than the first part 210. However, it is permissible for the distance from the center of the lid 1 to the first portion 210 to be the same as the distance from the center of the lid 1 to the knob portion 24, and it does not prohibit the tab member 31 from being arranged such that the first portion 210 is positioned closer to the center of the lid 1 than the second portion 211.

(First Joint and Second Joint)

[0454] In the lid 1, the first joint 210A is formed at the portion where the first portion 210 is joined with the small lid piece 13. Additionally, the second joint 211A is formed at the portion where the second portion 211 is joined with the main body 2.

[0455] In the lid 1, the strength of the joint (bonding strength) between the second portion 211 and the main body 2 at the second joint 211A is smaller than the strength of the joint (bonding strength) between the first portion 210 and the small lid piece 13 at the first joint 210A. This can be achieved by fixing the first portion 210 and the small lid piece 13 using ultrasonic bonding, heat sealing, adhesive bonding, etc., and adhering the second portion 211 and the main body 2 with a re-peelable adhesive. The re-peelable adhesive may be fixed to the tab member 31 or to the main body 2. Additionally, adhesives with different adhesive strengths may be provided for the first portion 210 and the second portion 211. The bonding strength between the first portion 210 and the small lid piece 13 refers to the magnitude of the force required to separate the first portion 210 and the small lid piece 13 without tearing them apart. The bonding strength between the second portion 211 and the main body 2 refers to the magnitude of the force required to separate the second portion 211 and the main body 2 without tearing them apart. If tearing occurs when separating the first portion 210 and the small lid piece 13, it corresponds to the case where the bonding strength is the greatest.

[0456] According to the lid 1, it is possible to obtain a lid that can easily and hygienically open the opening corresponding to the drinking spout.

Application Example

[0457] The lid 1 can be used with a container 150 with a lid, as shown in FIG. 63. FIG. 63 is a cross-sectional view showing an embodiment in which the lid 1 according to this embodiment is joined to the edge 103 of the opening 102 of the container 101 having an opening 102. The method of joining the lid 1 and the container 101 is not particularly limited and can be appropriately used with joining methods such as crimping or heat sealing.

[0458] The container 101 has a cylindrical side wall 104 and a bottom portion 106 that become thicker in the upward direction, forming a space 105 inside, and an opening 102 at the upper end of the main body (upper end of the side wall 104). Although not shown, the opening 102 of the container 101 is formed in a circular shape. However, the container 101 shown here is an example and does not limit the configuration of the container 101. For example, the container may have a mouth formed in a rectangular shape. The container may be any that can be covered with a lid at the mouth. Furthermore, the contents stored inside the container are not particularly limited and can include, for example, liquids, solids, or combinations thereof.

[0459] In the container shown in FIG. 63, a curl portion 109, where the member forming the main body of the container 101 is wound outwardly, is formed at the edge 103 of the opening 102, but the container 101 is not limited to this. The end surface of the side wall 104 may be exposed at the edge 103 of the opening 102, or a flange extending outwardly from the opening 102 of the container 101 may be formed at the edge 103 of the opening 102.

[0460] Additionally, the lid may be combined with a container having a mouth.

[0461] As explained so far, the lid 1 according to the present invention can be applied to many such embodiments of the lid 1. It is also possible to apply it to embodiments of the lid 1 other than those mentioned above. The lid according to the present invention has been described in detail above, but the above is merely an illustration of the lid according to the present invention and is not limited to these. Therefore, appropriate modifications may be made without departing from the spirit of the present invention. Furthermore, the configuration of the lid described above may be used independently for each example of the lid, or the configurations of the lids in each example may be appropriately combined and applied.

[0462] Based on the above description of this specification, the present invention may adopt the following configuration. [0463] [E1] [0464] It is formed to be joinable to a container having an opening formed at the upper end and an edge forming the outer periphery of the opening, [0465] and includes a base portion having a joint area corresponding portion that corresponds to the area joined to the container along the edge of the container and a small opening with a smaller opening area than the opening of the container, a small lid portion for opening and closing the small opening, and a hinge portion connecting the base portion and the small lid portion, [0466] The small lid portion is configured to be rotatable with respect to the base portion with the hinge portion as an axis, [0467] In a plan view of the base portion, the base portion has an overhang portion from the inner edge of the joint area corresponding portion inward and from the opening edge of the small opening outward, [0468] a lid. [0469] [E2] [0470] The overhang portion is defined as a margin portion that satisfies the following conditions 1 and 2, [0471] The lid described in [E1]. [0472] Condition 1: In a plan view of the base portion, the margin portion is a portion formed from the inner edge of the joint area corresponding portion inward and from the opening edge of the small opening outward. [0473] Condition 2: In a plan view of the base portion, when a line segment connecting the margin portion and the hinge portion is assumed, the line segment passes through the opening edge of the small opening. [0474] [E3] [0475] In a plan view of the base portion, the area of the margin portion is smaller than the area of the small opening, [0476] The lid described in [E2]. [0477] [E4] [0478] The margin portion is formed such that the inner edge and the outer edge of the margin portion are non-concentric, [0479] The lid described in [E2] or [E3]. [0480] [E5] [0481] The margin portion has an inclined portion that slopes downward from the outer edge of the margin portion toward the inner edge of the margin portion, [0482] The lid described in any one of [E2] to [E4]. [0483] [E6] [0484] A knob portion is provided on the upper surface side of the small lid portion, [0485] The lid described in any one of [E1] to [E5]. [0486] [E7] [0487] The knob portion has a tab member, [0488] The tab member is joined to the upper surface side of the small lid portion, [0489] The lid described in [E6]. [0490] [E8] [0491] When the small lid portion closes the small opening, a part of the tab member intersects the opening edge of the small opening in a plan view of the base portion, [0492] The lid described in [E7]. [0493] [E9] [0494] It has a holding structure forming portion that holds the small lid portion in an open state of the small opening by rotating the small lid portion with respect to the base portion with the hinge portion as an axis, [0495] A claw portion is provided on the knob portion, [0496] The base portion is provided with a receiving portion at a position that contacts the claw portion, [0497] The claw portion and the receiving portion form the holding structure forming portion, [0498] The lid described in any one of [E6] to [E8]. [0499] [E10] [0500] An extension portion is formed on the outer peripheral edge of the base portion, [0501] The lid described in any one of [E1] to [E9]. [0502] [E11] [0503] It has a holding structure forming portion that holds the small lid portion in an open state of the small opening by rotating the small lid portion with respect to the base portion with the hinge portion as an axis, [0504] A knob portion is provided on the upper surface side of the small lid portion, [0505] A claw portion is provided on the knob portion, [0506] The extension portion and the claw portion form the holding structure forming portion, [0507] The lid described in [E10]. [0508] [E12] [0509] The hinge portion is formed between the extension portion and the tip of the small lid portion, [0510] The lid described in [E10] or [E11]. [0511] [E13] [0512] A recessed portion is formed on the inner side of the joint area corresponding portion, [0513] The lid described in any one of [E1] to [E12]. [0514] [E14] [0515] A protruding portion is formed on the outer peripheral edge of the small lid portion, [0516] A concave portion corresponding to the protruding portion is formed on the opening edge of the small opening, [0517] The lid described in any one of [E1] to [E13]. [0518] [E15] [0519] A recessed portion is formed on the outer peripheral edge of the small lid portion, [0520] A convex portion corresponding to the recessed portion is formed on the opening edge of the small opening, [0521] The lid described in any one of [E1] to [E14]. [0522] [E16] [0523] A connecting structure is formed that connects the outer peripheral edge of the small lid portion and the opening edge of the small opening, [0524] The connecting structure is a fragile portion that is more fragile than the small lid portion, [0525] When the small lid portion rotates with respect to the base portion with the hinge portion as an axis, the fragile portion is destroyed, [0526] The lid described in any one of [E1] to [E15]. [0527] [E17] [0528] The fragile portion has a combination structure of a connecting portion and a cut, and/or a half-cut structure, [0529] The lid described in [E16]. [0530] [E18] [0531] It is formed of a paper-based material, [0532] The lid described in any one of [E1] to [E17]. [0533] [E19] [0534] It has a holding structure forming portion that holds the small lid portion in an open state of the small opening by rotating the small lid portion with respect to the base portion with the hinge portion as an axis, [0535] The lid described in any one of [E1] to [E18]. [0536] [E20] [0537] The lid described in any one of [E1] to [E19], [0538] and the container having the opening formed at the upper end and the edge forming the outer periphery of the opening, [0539] where the lid is joined to the container, [0540] a container with a lid. [0541] [E21] [0542] The lid described in any one of [E1] to [E19], [0543] having the container with the opening formed at the upper end and the edge forming the outer periphery of the opening, [0544] a combination of a lid and a container. [0545] Additionally, the present invention encompasses the following technical ideas. [0546] (F1) Used in a state where a joint area is formed attached to the edge to cover the mouth portion of a container having a mouth portion and an edge surrounding the mouth portion, [0547] having a main body including the joint area, [0548] The main body is equipped with a displacement facilitation structure configured to allow a part of the main body to be displaced towards the inside of the main body from an edge portion defined on the outer peripheral edge of the main body relative to another part of the main body. [0549] When the said part of the main body is referred to as the first portion and the other part of the main body is referred to as the second portion, [0550] The displacement facilitation structure has guide parts extending along the boundary between the first portion and the second portion from each of the first and second ends of the edge portion, [0551] The guide part traverses the joining area, [0552] Lid. [0553] (F2) The displacement facilitation structure further includes a hinge part formed inside the joining area, continuous with the guide part, [0554] When displacing the first portion relative to the second portion, the first portion rises against the second portion with the hinge part as the axis, [0555] The lid described in (F1). [0556] (F3) The first portion has a tapered shape towards the inside of the main body from the edge portion, [0557] The lid described in (F1) or (F2). [0558] (F4) The main body is provided with a protrusion extending outward from the edge portion, [0559] The lid described in any one of (F1) to (F3). [0560] (F5) The displacement facilitation structure has a hinge part formed inside the joining area, continuous with the guide part, [0561] The protrusion has a claw part on its inside, [0562] The second portion has a receiving part, [0563] When the first portion is folded over the upper surface side of the second portion with the hinge part as the axis, [0564] The claw part and the receiving part face each other, [0565] The lid described in (F4). [0566] (F6) The displacement facilitation structure has a hinge part formed inside the joining area, continuous with the guide part, [0567] The second portion has a receiving part, [0568] When displacing the first portion relative to the second portion, it displaces integrally with the first portion, and when the first portion is folded over the upper surface side of the second portion with the hinge part as the axis, [0569] The protrusion is displaced to a position where it can be inserted into the receiving part, [0570] The lid described in (F4). [0571] (F7) When the guide parts extending along the boundary between the first portion and the second portion from each of the first and second ends of the edge portion are referred to as the first guide part and the second guide part respectively, [0572] The length of the portion of the first guide part overlapping the joining area and the length of the portion of the second guide part overlapping the joining area are different, [0573] The lid described in any one of (F1) to (F6). [0574] (F8) When the guide parts extending along the boundary between the first portion and the second portion from each of the first and second ends of the edge portion are referred to as the first guide part and the second guide part respectively, [0575] The first guide part has a first outer guide part formed from the first end to the inner edge of the joining area, and a first inner guide part excluding the first outer guide part, [0576] The second guide part has a second outer guide part formed from the second end to the inner edge of the joining area, and a second inner guide part excluding the second outer guide part, [0577] At least one of the first inner guide part and the second inner guide part is formed along the inner edge of the joining area [0578] The lid described in any one of (F1) to (F6). [0579] (F9) The guide part has a notch structure or a weakening structure [0580] The lid described in any one of (F1) to (F8). [0581] (F10) The displacement facilitation structure is formed to allow the entire first portion to be separable from the second portion, [0582] The lid described in any one of (F1) to (F9). [0583] (F11) The displacement facilitation structure forms a protruding curved part in the guide part, curving from the first portion towards the second portion, [0584] The lid described in any one of (F1) to (F10). [0585] (F12) At least in the second portion, a recessed part is formed inside the joining area, making the non-formed surface of the joining area concave, [0586] When the farthest position from the edge portion of the inner edge of the joining area is taken as the reference position, the recessed part has an inclined surface sloping downwards from the reference position towards the first portion, [0587] The lid described in any one of (F1) to (F11). [0588] (F13) Inside the joining area, a groove is formed making the non-formed surface of the joining area concave, [0589] The lid described in any one of (F1) to (F11). [0590] (F14) The groove extends in a curved shape crossing the first portion, [0591] The lid described in (F13). [0592] (F15) The groove is formed in an annular shape, [0593] The lid described in (F13) or (F14). [0594] (F16) The main body is positioned such that the inner region inside the groove is higher than the outer region outside the groove, [0595] The lid described in any one of (F13) to (F15). [0596] (F17) The groove is formed in multiple concentric shapes, [0597] The lid described in any one of (F13) to (F16). [0598] (F18) The groove is formed such that its depth gradually increases as it gets closer to the first portion along the extending direction from a position distant from the first portion, [0599] The lid described in any one of (F13) to (F17). [0600] (F19) A container with an opening and, [0601] A lid described in any one of (F1) to (F18), [0602] A joining part is formed to join the edge of the container's opening and the joining area of the lid, [0603] Container with a lid. [0604] (F20) The joining part is formed by crimping or heat sealing, [0605] The container with a lid described in (F19). [0606] (F21) A container with an opening and a lid described in any one of (F1) to (F18), Combination of lid and container.

[0607] Furthermore, the present invention also encompasses the technical ideas shown below. [0608] (G1) It is formed to enable the formation of a joining area that is joined to an upper edge portion composed of the outer part from the edge of the opening for a container with an opening, [0609] Equipped with a main body having a part corresponding to the joining area, [0610] The main body has a first portion defined as a part that is rotated upwards to expose the opening when the main body is joined to the edge of the opening of the container, and a second portion excluding the first portion, [0611] The boundary between the first portion and the second portion in a non-rotating state where the rotation of the first portion relative to the second portion is restricted forms a hinge part that becomes the rotation axis of the first portion when forming an upward displacement state defined as the state where the first portion is rotated upwards relative to the second portion, and a guide part that determines the position where separation between the first portion and the second portion is intended to occur when forming the upward displacement state, [0612] And, the main body is configured to form a downward displacement state defined as the state where the first portion is pushed downwards relative to the second portion with the hinge part as the rotation axis, [0613] Lid. [0614] (G2) At least one end of the hinge part is formed at a position overlapping the joining area in a plan view of the main body, [0615] The lid described in (G1). [0616] (G3) The main body has an annular outer part having a portion corresponding to the area outside the inner edge of the joining area and an inner part formed inside the outer part, [0617] At least a part of the guide part is formed in the inner part, [0618] The lid described in (G1) or (G2). [0619] (G4) When the main body is joined to the upper edge portion of the container, in a plan view of the main body, the outer part is positioned outside the edge of the opening, [0620] The lid described in (G3). [0621] (G5) When the main body is joined to the upper edge portion of the container, in a plan view of the main body, at least one end of the hinge part is positioned outside the edge of the opening, [0622] The lid described in any one of (G1) to (G4). [0623] (G6) When the main body is joined to the upper edge portion of the container, in the non-rotating state, in a plan view of the main body, the guide part is formed to be spaced apart from the part corresponding to the joining area as it moves away from the boundary between the hinge part and the guide part along the extending direction of the guide part, [0624] The lid described in any one of (G1) to (G5). [0625] (G7) A tab member is joined to the first portion, [0626] The lid described in any one of (G1) to (G6). [0627] (G8) In a plan view of the main body, the tab joining part defined as the joining part between the tab member and the first portion is formed at a position closer to the front end of the guide part than the hinge part, [0628] The lid described in (G7). [0629] (G9) The tab member is joined at one end to the first portion, [0630] The tab member forms a knob part at the other end, [0631] The lid described in (G7) or (G8). [0632] (G10) The other end side of the tab member is positioned closer to the center side of the main body than the one end of the tab member, [0633] The lid described in (G9). [0634] (G11) The tab member has a locking part, [0635] The lid described in any one of (G7) to (G10). [0636] (G12) The second portion has a locking receiving part formed in a shape capable of receiving the locking part, [0637] The lid described in (G11). [0638] (G13) The main body is provided with an extending part extending outward from a part of the outer peripheral edge of the main body, [0639] A part of the first portion traverses the joining area and is continuous with the extending part, [0640] The lid described in any one of (G1) to (G6). [0641] (G14) When the main body is joined to the upper edge portion of the container, in a plan view of the main body, a bending auxiliary part is formed in the first portion at a position directed from the extending part towards the hinge part and inside the edge of the opening, [0642] The lid described in (G13). [0643] (G15) The main body is formed of a paper-based material, [0644] The lid described in any one of (G1) to (G14). [0645] (G16) The container is formed such that the opening diameter decreases in the downward direction from the opening, [0646] The lid according to any one of (G1) to (G15). [0647] (G17) The container has a flange portion at the upper edge, [0648] The lid according to any one of (G1) to (G16). [0649] (G18) In the downward displacement state, the guide portion of the first part contacts the inner peripheral surface of the container, [0650] The lid according to any one of (G1) to (G17). [0651] (G19) A container having an opening and an upper edge portion formed from the edge of the opening to the outside, [0652] and a lid according to any one of (G1) to (G18), [0653] A joint is formed to join the upper edge portion of the container and the joining area of the lid, [0654] A container with a lid. [0655] (G20) The joint is formed by crimping or heat sealing, [0656] The container with a lid according to (G19). [0657] (G21) The container is formed such that the opening diameter decreases in the downward direction from the opening, as described in the container with a lid according to (G19) or (G20). [0658] (G22) The container has a flange portion at the upper edge, [0659] The container with a lid according to any one of (G19) to (G21). [0660] (G23) In the downward displacement state, the guide portion of the first part contacts the inner peripheral surface of the container, [0661] The container with a lid according to any one of (G19) to (G22). [0662] (G24) A container having an opening and an upper edge portion formed from the edge of the opening to the outside, and a lid according to any one of (G1) to (G18), [0663] A combination of a lid and a container. [0664] Furthermore, the present invention encompasses the technical ideas shown below. [0665] (H1) A container having an opening formed at the upper end and a lid attached to the container and covering the opening, [0666] The container has an edge surrounding the opening, [0667] and has a joint for joining the container and the lid along the edge, [0668] The lid has a main body portion that forms a small opening with a smaller opening area than the opening on the inside of the portion corresponding to the joint in a plan view of the lid, a small lid portion that can open and close the small opening, and a hinge portion that connects the small lid portion to the main body portion rotatably, [0669] The joint has at least a wide portion and a narrow portion with a smaller width than the wide portion as parts with different widths, [0670] In a state where the small opening is covered by the small lid portion, in a plan view of the lid, when assuming a half-line intersecting the wide portion from the center of the lid, at least one of the half-lines intersects the small lid portion, [0671] A container with a lid. [0672] (H2) The joint has at least the wide portion and the narrow portion with a smaller width than the wide portion, connected to the two ends of the wide portion as parts with different widths, [0673] The container with a lid according to (H1). [0674] (H3) The main body portion of the lid is formed of a paper-based material, [0675] The container with a lid according to (H1) or (H2). [0676] (H4) In a state where the small opening is covered by the small lid portion, in a plan view of the lid, the center of the hinge portion is formed at a position deviated from the line passing through the center of the wide portion along the longitudinal direction of the wide portion from the center of the lid, [0677] The container with a lid according to any one of (H1) to (H3). [0678] (H5) A tab member is provided on the small lid portion of the lid, [0679] The container with a lid according to any one of (H1) to (H4).

[0680] Furthermore, the present invention also encompasses the technical ideas shown below. [0681] (I1) A lid having a joining area joined to the periphery of the mouth of the container, [0682] having a shape that covers the mouth when joined to the container, [0683] a main body with an opening, [0684] a small lid piece covering the opening, [0685] and a tab member, [0686] The small lid piece is connected to the main body at least partially along its outer periphery and is formed to be displaceable to a raised state relative to the main body, [0687] and is formed such that the opening is exposed when the small lid piece is raised, [0688] The tab member has a first portion joined to the small lid piece and a second portion that can be joined to the main body when the small lid piece is raised, [0689] When the portion where the first portion and the small lid piece are joined is defined as the first joint, and the portion where the second portion and the main body are joined is defined as the second joint, [0690] the strength of the joint between the second portion and the main body at the second joint is smaller than the strength of the joint between the first portion and the small lid piece at the first joint, [0691] Lid. [0692] (12) A container with a mouth and the lid according to (11), [0693] A combination of a container and a lid. [0694] (13) A container with a mouth and the lid according to (11), [0695] The mouth of the container is covered by the lid, [0696] A container with a lid.

REFERENCE SIGNS LIST

[0697] 1: Lid [0698] 2: Main body [0699] 2A: Outer periphery [0700] 3: Small lid portion [0701] 3A: Outer periphery [0702] 4: Opening forming portion [0703] 5: Joining area corresponding portion [0704] 6: Small opening [0705] 6G: Opening edge [0706] 7: Hinge portion [0707] 7A: End portion [0708] 8: Notch portion [0709] 10: Margin portion [0710] 10A: First margin portion [0711] 10B: Second margin portion [0712] 11A: Tip portion [0713] 11B: First protruding portion [0714] 12: Bending auxiliary portion [0715] 13: Protruding portion [0716] 14: Protruding curved portion [0717] 15A: First portion [0718] 15B: Second portion [0719] 16: Half-cut portion [0720] 17: Connection structure [0721] 18A: Continuous portion [0722] 18B: Cutting portion [0723] 19: Inclined portion [0724] 20: Receiving portion [0725] 21: Fixing structure forming portion [0726] 23: Holding portion [0727] 24: Knob portion [0728] 26: Insertion portion [0729] 30: Holding structure forming portion [0730] 31: Tab member [0731] 31A: One end portion [0732] 31B: Other end portion [0733] 32: Claw portion [0734] 33: Receiving portion [0735] 34: Tab joint [0736] 35: Overlapping portion [0737] 72: Outer portion [0738] 73: Inner edge portion [0739] 74: Hinge connecting portion [0740] 75: Front edge portion [0741] 76: Side edge portion [0742] 101: Container [0743] 102: Opening [0744] 103: Edge [0745] 104: Side wall [0746] 105: Space portion [0747] 107: Side wall portion [0748] 108: Flange portion [0749] 110: Container body [0750] 150: Container with lid [0751] 151: Joint [0752] CT: Center [0753] F: Arrow [0754] M: Line segment [0755] ME: Extension line [0756] R: Joining area [0757] S1: Portion [0758] S11: Portion [0759] S12: Portion [0760] S2: Portion [0761] SB1: Predetermined position [0762] SB2: Corresponding position [0763] XS: Area