ATTIC STAIRS

Abstract

Attic stairs include: a frame assembly; a door panel assembly, movably mounted below side plates, where the door panel assembly includes a door panel and a fixed frame, and the fixed frame is fixedly mounted on the door panel; a plurality of adjustment members, mounted on two sides of the fixed frame; an attic stair assembly, including a plurality of foldable stair segments, where a lowermost stair segment is mounted on the adjustment members, and a distance between the lowermost stair segment and the door panel is adjusted along the adjustment members; and a hinge assembly, including two unfolding hinge mechanisms and two limiting hinge mechanisms. The two unfolding hinge mechanisms allow the door panel to rotate downward along a side of the unfolding hinge mechanisms to be opened and closed. The two limiting hinge mechanisms are configured to limit the unfolding angle of the door panel.

Claims

1. Attic stairs, comprising: a frame assembly, comprising a plurality of side plates, wherein the plurality of side plates successively enclose an accommodation space; a door panel assembly, movably mounted below the plurality of side plates, wherein the door panel assembly comprises a door panel and a fixed frame, and the fixed frame is fixedly mounted on the door panel; a plurality of adjustment members, mounted on two sides of the fixed frame; an attic stair assembly, comprising a plurality of foldable stair segments, wherein a lowermost stair segment of the plurality of foldable stair segments is mounted on the plurality of adjustment members, a distance between the lowermost stair segment and the door panel is adjusted along the plurality of adjustment members, and the attic stair assembly is allowed to be accommodated in the accommodation space; and a hinge assembly, comprising two unfolding hinge mechanisms and two limiting hinge mechanisms, wherein first ends of the two unfolding hinge mechanisms are respectively arranged at end portions of two sides of the fixed frame, and second ends of the two unfolding hinge mechanisms are connected to end portions of inner sides of two side plates of the plurality of side plates, so that the door panel is allowed to rotate downward along a side of the two unfolding hinge mechanisms to be opened and closed; first ends of the two limiting hinge mechanisms are respectively arranged at a middle of the fixed frame, and second ends of the two limiting hinge mechanisms are connected to middles of the inner sides of the two side plates for limiting an unfolding angle of the door panel.

2. The attic stairs according to claim 1, further comprising an elastic member, wherein a first end of the elastic member is connected to each of the two limiting hinge mechanisms, and a second end of the elastic member is connected to each of the end portions of of the two side plates.

3. The attic stairs according to claim 1, wherein each of the two unfolding hinge mechanisms comprises a first fixing member, a first connection rod, a second connection rod, and a second fixing member; the first fixing member is fixed to each of the end portions of the inner sides of the two side plates, and the first fixing member is arranged parallel to a length direction of each of the two side plates; the second fixing member is fixed to an end portion of the fixed frame, and the second fixing member is arranged parallel to a length direction of the door panel; and two ends of the first connection rod are hingedly connected to a first end of the first fixing member and a first end of the second fixing member, respectively, and two ends of the second connection rod are hingedly connected to a second end of the first fixing member and a second end of the second fixing member, respectively, so that the first fixing member, the first connection rod, the second connection rod and the second fixing member are connected to form a quadrangle.

4. The attic stairs according to claim 1, wherein each of the two limiting hinge mechanisms comprises a lower connection rod, an upper connection rod, a connection piece, a first hinge arm and a second hinge arm, wherein the connection piece is rotatably connected to each of the middles of the inner sides of the two side plates; and a first end of the lower connection rod is hinged to the middle of the fixed frame, and a second end of the lower connection rod is hingedly connected to a first end of the upper connection rod; a second end of the upper connection rod is fixed to a first end of the connection piece, and a second end of the connection piece is hingedly connected to a first end of the first hinge arm; a second end of the first hinge arm is hinged to a first end of the second hinge arm, and a second end of the second hinge arm is connected to an elastic member.

5. The attic stairs according to claim 4, wherein each of the two limiting hinge mechanisms further comprises a limiting seat, wherein the limiting seat is fixed to each of the middles of the inner sides of the two side plates, and a limiting step is arranged on the limiting seat; the connection piece is rotatably connected to the limiting seat through a pin shaft, and an end portion of the connection piece is limited at the limiting step.

6. The attic stairs according to claim 1, wherein each of the plurality of adjustment members comprises a connection plate and a fastening member, wherein an end of the connection plate is fixed to the fixed frame, and an adjustment groove is formed in the connection plate; a first adjustment end and a second adjustment end are at least arranged on the adjustment groove; a distance between the first adjustment end and the door panel is smaller than a distance between the second adjustment end and the door panel; and the fastening member mounts the lowermost stair segment on the first adjustment end or the second adjustment end.

7. The attic stairs according to claim 6, wherein the adjustment groove is L-shaped.

8. The attic stairs according to claim 6, wherein when the fastening member mounts the lowermost stair segment on the first adjustment end, the lowermost stair segment is in contact with the fixed frame.

9. The attic stairs according to claim 3, wherein two protruding portions are arranged on the first fixing member, and the two protruding portions are located at a hinge joint of the first connection rod and the second connection rod.

10. The attic stairs according to claim 9, wherein the second fixing member is a slot frame, and the slot frame is formed by connecting an upper side frame, a connection frame and a lower side frame in sequence; the upper side frame and the lower side frame are clamped on the fixed frame, and the first connection rod and the second connection rod are hingedly connected to the connection frame.

11. The attic stairs according to claim 4, wherein the connection piece comprises a first connection plate and a second connection plate, wherein the upper connection rod and the first hinge arm are arranged between the first connection plate and the second connection plate.

12. The attic stairs according to claim 1, wherein the fixed frame is formed by connecting four square pipes in sequence.

13. The attic stairs according to claim 1, wherein a low end of the door panel is provided with a pull rope.

14. The attic stairs according to claim 1, wherein the plurality of adjustment members comprise four adjustment members, wherein the four adjustment members are respectively located at two end portions of two sides of the door panel.

15. The attic stairs according to claim 1, further comprising a handrail, wherein the handrail is fixed to a side end of the lowermost stair segment, to the fixed frame, or to the plurality of adjustment members.

16. The attic stairs according to claim 1, further comprising a sealing strip, wherein a lower end of each of the plurality of side plates is provided with a notch for mounting a door panel; a sealing step is arranged on the notch, and the sealing strip is mounted on the sealing step; the door panel is folded in the notch of the frame assembly, and an upper surface of the door panel is in tight contact with the sealing strip.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1 is a structural schematic diagram of the present invention.

[0027] FIG. 2 is a front schematic view of the structure of the present invention.

[0028] FIG. 3 is a schematic diagram when the height of the structure in FIG. 2 is adjusted to the minimum height.

[0029] FIG. 4 is a mounting schematic diagram of the structure of the present invention in an unfolded state.

[0030] FIG. 5 is a perspective view of the attic stairs in the open state.

[0031] FIG. 6 is a structural diagram of the hinge assembly and the fixed frame of the present invention.

[0032] FIG. 7 is a side view of the structure of FIG. 6.

[0033] FIG. 8 is a structural schematic diagram of the attic stair assembly.

[0034] FIG. 9 is a structural schematic diagram of the frame assembly.

[0035] FIG. 10 is a structural schematic diagram of the present invention in a folded state (a side plate is hidden in the figure).

[0036] FIG. 11 is a structural schematic diagram of the structure in FIG. 10 when the door panel is opened at an angle (a side plate is hidden in the figure).

[0037] FIG. 12 is a structural schematic diagram of the structure in FIG. 10 when the door panel is fully opened (a side plate is hidden in the figure).

[0038] Symbols of main components are described as follows:

[0039] 1: frame assembly, 11: side plate, 12: accommodation space, 13: sealing step, 14: notch;

[0040] 2: door panel assembly, 21: door panel, 22: fixed frame, 221: square pipe;

[0041] 3: adjustment member, 31: connection plate, 32: fastening member, 33: adjustment groove;

[0042] 4: attic stair assembly, 41: lowermost stair segment, 42: stair board;

[0043] 5: hinge assembly;

[0044] 51: unfolding hinge mechanism, 511: first fixing member, 5111: protruding portion, 512: first connection rod, 513: second connection rod, 514: second fixing member, 5141: upper side frame, 5142: connection frame, 5143: lower side frame;

[0045] 52: limiting hinge mechanism, 521: lower connection rod, 522: upper connection rod, 523: connection piece, 5231: first connection plate, 5232: second connection plate, 524: first hinge arm, 525: second hinge arm, 526: limiting seat, 5261: limiting step, 527: pin shaft; and

[0046] 6: handrail, 7: spring, 8: pull rope, 9: sealing strip.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] In order to make the objectives, technical solutions and advantages of the present invention clearer and better understood, the present invention will be described in further detail below with reference to the drawings and embodiments.

[0048] As shown in FIGS. 1- 5, the present invention discloses attic stairs, including the frame assembly 1, the door panel assembly 2, the adjustment members 3, the attic stair assembly 4, and the hinge assembly 5. As shown in FIG. 4, the attic stairs are top-mounted stairs and are mounted on the ceiling T of the attic, so that the frame assembly 1 is embedded in the opening of the ceiling. When the attic stairs are not needed to be used, the door panel assembly 2 is tightly attached to the frame assembly 1, so that the bottom of the door panel assembly 2 is flush with the ceiling, thereby realizing the hidden design of the attic stairs. When the attic stairs are needed to be used, the door panel assembly 2 is opened downward, so that the attic stair assembly 4 is placed on the ground D, allowing a person to climb along the stairs to the attic.

[0049] Specifically, as shown in FIG. 9, the frame assembly 1 includes four side plates 11, and the four side plates 11 successively enclose the accommodation space 12. The accommodation space 12 is configured to accommodate the attic stair assembly 4. When not in use, the attic stair assembly 4 is accommodated in the accommodation space 12. In order to achieve a sealed connection with the frame assembly 1 when the door panel assembly 2 is closed, the sealing strips 9 are mounted below the four side plates 11. The lower end of the side plate 11 is provided with the notch 14 for mounting a door panel. The sealing step 13 is arranged on the notch 14, and the sealing strip 9 is mounted on the sealing step 13. The door panel 21 is folded in the notch 14 of the frame assembly 1, and the upper surface of the door panel 21 is in tight contact with the sealing strip 9.

[0050] The door panel assembly 2 is movably mounted below the frame assembly 1. The door panel assembly 2 includes the door panel 21 and the fixed frame 22, and the fixed frame 22 is fixedly mounted on the door panel 21. The pull rope 8 is arranged below the door panel 21. As shown in FIG. 6, the fixed frame 22 is formed by connecting four square pipes 221 in sequence. In other embodiments, the fixed frame 22 may also include only two square pipes 221 on both sides. The fixed frame 22 not only facilitates the connection of the hinge assembly 5, but also improves the strength of the door panel 21. The door panel 21 can be made of wooden material, and the surface of the door panel 21 can also be provided with a laminating layer (not shown in the figure) with the same texture and color tone as the ceiling, so that when the door panel 21 is folded in the frame assembly 1, the texture and color tone consistent with the ceiling are more beautiful.

[0051] As shown in FIG. 5, four adjustment members 3 are mounted on two sides of the fixed frame 22. The adjustment member 3 includes the connection plate 31 and the fastening member 32. An end of the connection plate 31 is fixed to the fixed frame 22, and the adjustment groove 33 is formed in the connection plate 31. Two adjustment ends are at least arranged on the adjustment groove 33, and are the first adjustment end A and the second adjustment end B, respectively. As shown in FIG. 10, the distance H1 between the first adjustment end A and the door panel 21 is smaller than the distance between the second adjustment end B and the door panel 21. In this embodiment, the adjustment groove 33 is L-shaped. In other embodiments, the adjustment groove 33 may also have other special shapes with two or more adjustment ends, so that the height positions of the attic stair assembly 4 fixed to the adjustment member 3 are different at different adjustment ends.

[0052] The attic stairs further include the handrail 6 for climbing the stairs, and the handrail 6 can be arranged on one or two sides. The handrail 6 can be fixed to the side end of the lowermost stair segment 41, to the fixed frame 22, or to the connection plate 31 of the adjustment member 3. In this embodiment, the handrail 6 is fixed to the connection plate 31.

[0053] The attic stair assembly 4 includes three foldable stair segments. The fastening member 32 mounts the lowermost stair segment 41 on any adjustment end, and can move to different adjustment ends along the adjustment groove 33 to adjust the distance between the lowermost stair segment and the door panel 21. The other two stair segments are foldably arranged on the lowermost stair segment in sequence, as shown in FIG. 8. The attic stair assembly 4 can be entirely folded and accommodated in the accommodation space 12. As shown in FIG. 2, when the attic stair assembly 4 is arranged at the second adjustment end B of the adjustment groove 33, the overall height is relatively high at this time. As shown in FIG. 3, during factory packaging, when the attic stair assembly 4 is arranged at the first adjustment end A of the adjustment groove 33, the lowermost stair segment 41 is in contact with the fixed frame, so that the entire attic stairs have the smallest overall height Hmin, so as to facilitate factory packaging and transportation.

[0054] As shown in FIGS. 6-7, the hinge assembly 5 includes two unfolding hinge mechanisms 51 and two limiting hinge mechanisms 52. Ends of the two unfolding hinge mechanisms 51 are respectively arranged at end portions of two sides of the fixed frame 22, and the other ends of the unfolding hinge mechanisms 51 are connected to the end portions of inner sides of the side plates 11, so that the door panel 21 can rotate downward along a side of the unfolding hinge mechanisms to be opened and closed. Ends of the two limiting hinge mechanisms 52 are respectively arranged at the middle of the fixed frame 22, and the other ends of the limiting hinge mechanisms 52 are connected to the middles of the inner sides of the side plates 11 for limiting the unfolding angle of the door panel 21.

[0055] The unfolding hinge mechanism 51 includes the first fixing member 511, the first connection rod 512, the second connection rod 513, and the second fixing member 514. The first fixing member 511 is fixed to the end portion of the inner side of the side plate 11, and is arranged parallel to the length direction of the side plate 11. The second fixing member 514 is fixed to an end portion of the fixed frame 22, and is arranged parallel to the length direction of the door panel 21.

[0056] Two ends of the first connection rod 512 are hingedly connected to one end of the first fixing member 511 and one end of the second fixing member 514, respectively. Two ends of the second connection rod 513 are hingedly connected to the other end of the first fixing member 511 and the other end of the second fixing member 514, respectively. Two protruding portions 5111 are arranged on the first fixing member, and the two protruding portions 5111 are located at the hinge joint of the first connection rod 512 and the second connection rod 513. Through the arrangement of the protruding portions 5111, the first connection rod 512 and the second connection rod 513 can be easily rotated at the hinge joint. The second fixing member 514 is a slot frame, and the slot frame is formed by connecting the upper side frame 5141, the connection frame 5142 and the lower side frame 5143 in sequence. The upper side frame 5141 and the lower side frame 5143 are clamped on the fixed frame 22, and the first connection rod 512 and the second connection rod 513 are hingedly connected to the connection frame 5142.

[0057] Through the connection of the unfolding hinge mechanism 51 described above, the first fixing member 511, the first connection rod 512, the second connection rod 513 and the second fixing member 514 are connected to form a quadrangle. Moreover, the first connection rod 512 and the second connection rod 513 have a total of four hinge position points. During the process of rotating to be opened and closed, the unfolding hinge mechanism not only rotates along the end portion, but also forms a displacement in the horizontal direction. As shown in FIGS. 11-12, when rotating downward, the door panel assembly moves inward by a small distance in the horizontal direction, so that when rotating, the door panel 21 is separated from the side plates 11, which can avoid interference between the door panel 21 and the side plates 11.

[0058] The limiting hinge mechanism 52 includes the lower connection rod 521, the upper connection rod 522, the connection piece 523, the first hinge arm 524, the second hinge arm 525, and the limiting seat 526. The limiting seat 526 is fixed to the middle of the inner side of the side plate 11, and the limiting step 5261 is arranged on the limiting seat 526. The connection piece 523 includes the first connection plate 5231 and the second connection plate 5232, and the upper connection rod 522 is arranged between the first connection plate 5231 and the second connection plate 5232. The first hinge arm 524 is arranged between the first connection plate and the second connection plate. The first hinge arm and the second hinge arm can be partially accommodated in the space between the first connection plate and the second connection plate.

[0059] The connection piece 523 is rotatably connected to the limiting seat 526 through the pin shaft 527, and an end portion of the connection piece 523 is limited at the limiting step 5261. One end of the lower connection rod 521 is hinged to the middle of the fixed frame 22, and the other end of the lower connection rod 521 is hingedly connected to the upper connection rod 522. The other end of the upper connection rod 522 is fixed to one end of the connection piece 523, and the other end of the connection piece 523 is hingedly connected to one end of the first hinge arm 524. The first hinge arm 524 is hinged to one end of the second hinge arm 525, and the other end of the second hinge arm 525 is connected to an elastic member. In this embodiment, the elastic member is the spring 7. The other end of the spring 7 is connected to the end portion of the side plate 11.

[0060] As shown in FIGS. 10-12, the pull rope 8 is pulled by hand, so that the door panel assembly 2 is rotated downward to be opened. When pulled to the state shown in FIG. 12, the door panel assembly 2 is pulled to the maximum angle under the limiting action of the limiting hinge mechanism 52. Then, the three foldable stair segments on the attic stair assembly 4 are flipped and spliced into the whole stairs to form the state shown in FIGS. 4 and 5. The attic stair assembly 4 is adjusted to the second adjustment end B along the adjustment groove 33, so that a certain distance is formed between the stair board 42 and the door panel 21. In this way, when a person climbs the stairs and the foot steps on the stair board 42, there is enough space at the front end of the foot. In initial use, depending on the height of the ceiling, the user can cut the stairs at the bottom of the attic stair assembly 4, so that the stairs come into contact with the ground. After cutting, if there are still some gaps, the position of the attic stair assembly 4 can be adjusted along the adjustment groove 33 to achieve fine adjustment of the position, so that the bottom surface of the stairs is in complete contact with the ground, as shown in FIG. 4.

[0061] After use, the three foldable stair segments are folded, and the door panel assembly 2 is pushed upward, so that under the action of the pulling force of the spring 7, the door panel assembly 2 is returned into the door frame assembly 1.

[0062] The above only describes the preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can easily occur to any person skilled in the technical field within the technical scope disclosed in the present invention shall fall within the scope of protection of the present invention.