SEAT BOARD OF FOLDABLE CHAIR AND BOTTOM FRAME THEREOF

Abstract

A seat board of a foldable chair includes a panel and a bottom frame. A top portion of the bottom frame is bent to form an annular inner blocking edge and an annular outer pressing edge, and an annular installation groove is formed between the annular inner blocking edge and the annular outer pressing edge. The panel form an annular folded-downward edge, and the annular folded-downward edge is inserted into the annular installation groove. The annular inner blocking edge cooperates with the annular outer pressing edge to clamp and secure the annular folded-downward edge. Two elongated sliding slots are symmetrically located on outer side edges of a right side and a left side of the bottom frame, and the two T-shaped rivets are slidably connected to the seat board and chair legs.

Claims

1. A seat board of a foldable chair, comprising: a panel, and a bottom frame, wherein: the bottom frame is formed by bending a metal material sheet, has a rectangular shape, and has smooth transitions on four corners, a top portion of the bottom frame is bent to form an annular inner blocking edge and an annular outer pressing edge, an annular installation groove having an upper opening is formed between the annular inner blocking edge and the annular outer pressing edge, four sides of the panel form an annular folded-downward edge folded downward, the annular folded-downward edge is inserted into the annular installation groove from top to bottom, the annular inner blocking edge cooperates with the annular outer pressing edge to clamp and secure the annular folded-downward edge, two elongated sliding slots extending in a front and rear direction and configured for two T-shaped rivets to slide are symmetrically located on an outer side edge of a left side of the bottom frame and an outer side edge of a right side of the bottom frame, first ends of the two elongated sliding slots comprise enlarged holes into which caps of the two T-shaped rivets are configured to be inserted from outside, widths of the caps of the two T-shaped rivets are greater than widths of slot openings of the two elongated sliding slots and are smaller than widths of the enlarged holes, and two rivets for pivotally connecting to chair legs of the foldable chair are installed at positions of the enlarged holes after the two T-shaped rivets are inserted into the two elongated sliding slots.

2. The seat board of the foldable chair according to claim 1, wherein: an inner side edge and an outer side edge of a side portion of the bottom frame are vertical edges.

3. The seat board of the foldable chair according to claim 1, wherein: a section of the bottom frame is a closed-ring hollow tube structure.

4. The seat board of the foldable chair according to claim 3, wherein: an outer side edge of the section of the bottom frame is a vertical edge, and a bottom edge of the section of the bottom frame is a horizontal straight edge.

5. The seat board of the foldable chair according to claim 4, wherein: an inner end of the bottom edge of the section of the bottom frame is bent upward and toward an inner side of the bottom frame to form a C-shaped extension segment.

6. The seat board of the foldable chair according to claim 1, wherein: bent steps are formed on both a top position and a bottom position of an outer side edge of a section of the bottom frame.

7. A seat board of a foldable chair, comprising: a panel, and a bottom frame, wherein: the bottom frame is formed by bending a metal material sheet, has a rectangular shape, and has smooth transitions on four corners, a section of the bottom frame comprises a top portion, side portions, and a bottom portion, the top portion of the bottom frame is bent to form an annular inner blocking edge and an annular outer pressing edge, an annular installation groove having an upper opening is formed between the annular inner blocking edge and the annular outer pressing edge, four sides of the panel form an annular folded-downward edge folded downward, the annular folded-downward edge is inserted into the annular installation groove from top to bottom, the annular inner blocking edge cooperates with the annular outer pressing edge to clamp and secure the annular folded-downward edge, two elongated sliding slots extending in a front and rear direction and configured for two T-shaped rivets to slide are symmetrically located on an outer side edge of a left side of the bottom frame and an outer side edge of a right side of the bottom frame, and the two T-shaped rivets are slidably connected to the seat board and chair legs of the foldable chair.

8. The seat board of the foldable chair according to claim 1, wherein: a section of the bottom frame is a non-closed ring with a side facing inward being an open structure.

9. The seat board of the foldable chair according to claim 4, wherein: an inner end of the bottom edge of the section of the bottom frame is bent to form an inclined extension segment with a distal end of the inclined extension segment abutting the bottom edge of the section of the bottom frame.

10. The seat board of the foldable chair according to claim 4, wherein: an inner end of the bottom edge of the section of the bottom frame is bent to form a horizontal extension segment overlapping and abutting the bottom edge of the section of the bottom frame.

11. The seat board of the foldable chair according to claim 2, wherein: bent steps are respectively formed on a top position and a bottom position of an outer side edge of a section of the bottom frame.

12. The seat board of the foldable chair according to claim 3, wherein: bent steps are respectively formed on a top position and a bottom position of an outer side edge of the section of the bottom frame.

13. The seat board of the foldable chair according to claim 4, wherein: bent steps are respectively formed on a top position and a bottom position of the outer side edge of the section of the bottom frame.

14. The seat board of the foldable chair according to claim 5, wherein: bent steps are respectively formed on a top position and a bottom position of the outer side edge of the section of the bottom frame.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] FIG. 1 illustrates a perspective view of a foldable chair using a seat board of the present disclosure.

[0020] FIG. 2 illustrates a diagrammatic view of a body of the seat board of the present disclosure.

[0021] FIG. 3 illustrates an exploded perspective view of the seat board shown in FIG. 2 before assembly.

[0022] FIG. 4 illustrates a perspective view of a bottom frame shown in FIG. 2.

[0023] FIG. 5 illustrates a partial sectional view of the seat board shown in FIG. 2.

[0024] FIG. 6 illustrates a diagrammatic view of the seat board shown in FIG. 2, when a folded-downward edge is disposed in an installation groove and the folded-downward edge is not fixed.

[0025] FIG. 7 illustrates a diagrammatic view of a first structural alternative of the bottom frame of the seat board shown in FIG. 2.

[0026] FIG. 8 illustrates a diagrammatic view of a second structural alternative of the bottom frame of the seat board shown in FIG. 2.

[0027] FIG. 9 illustrates a diagrammatic view of a third structural alternative of the bottom frame of the seat board shown in FIG. 2.

[0028] FIG. 10 illustrates a diagrammatic view of a fourth structural alternative of the bottom frame of the seat board shown in FIG. 2.

[0029] FIG. 11 illustrates a diagrammatic view of a fifth structural alternative of the bottom frame of the seat board shown in FIG. 2.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. It is obvious that the described embodiments are preferred embodiments of the present disclosure and should not be understood as exclusive of other embodiments. All other embodiments fall within the protective scope of the present disclosure provided that they are obtained by people of ordinary skill in the art based on the embodiments of the present disclosure without making creative efforts.

[0031] In the claims, the specification, and the accompany drawings of the present disclosure, unless otherwise explicitly specified, with respect to oriental terms, for example, terms of vertical, top, bottom, inner, outer, upper, lower, front, rear, left, right, and the like are used to indicate orientation or positional relationships based on FIG. 1. The orientation or the positional relationships are described in view of a viewpoint of the reader, so that the technical solution of the present disclosure is easily understood to easily describe the present disclosure and simplify the description, rather than indicating or implying that the referenced device or element should have a specific orientation or be constructed and operated in a specified orientation and should not be understood as a limitation of a specific protective scope of the present disclosure.

[0032] In the claims, the specification, and the accompanying drawings of the present disclosure, unless otherwise explicitly specified, the terms fixedly connected and fixed connection should develop broad understanding. That is, there is no connection method of displacement relationship or relative rotational movement relationship between the two components. In other words, the terms fixedly connected and fixed connection include non-detachable fixed connections, detachable fixed connections, integrated connections, and fixed connections through other devices or elements.

EMBODIMENT

[0033] Referring to FIGS. 1-6, a seat board 100 can be assembled together with two front legs 200 and two rear legs 300 to form a foldable chair. The seat board 100 comprises a panel 10 and a bottom frame 20. The panel 10 is connected to the bottom frame 20, and the bottom frame 20 is connected to the two front legs 200 and the two rear legs 300. The bottom frame 20 is a metal member, has a rectangular shape, and has smooth transitions on four corners. An outer side edge of a left side and an outer side edge of a right side of the bottom frame 20 are symmetrically disposed with two elongated sliding slots 21 extending in a front and rear direction and configured for two T-shaped rivets 400 to slide. First ends of the two elongated sliding slots 21 comprise enlarged holes 22 into which caps 401 of the two T-shaped rivets 400 are inserted from outside. Widths of the caps 401 of the two T-shaped rivets 400 are greater than widths of slot openings of the two elongated sliding slots 21 and are smaller than widths of the enlarged holes 22. After the two T-shaped rivets 400 are inserted into the two elongated sliding slots 21, two rivets 500 for pivotally connecting to chair legs (e.g., the two rear legs 300) are installed at positions of the enlarged holes 22. Therefore, in this embodiment, it can be seen that the two front legs 200 are connected to the bottom frame 20 through the two T-shaped rivets 400 and the two rear legs 300 are connected to the bottom frame 20 through the rivets 500. During a folding process, the two T-shaped rivets 400 can slide in the two elongated sliding slots 21 for avoidance.

[0034] When the seat board 100 is assembled, the seat board 100 can be respectively connected to the two front legs 200 and the two rear legs 300 through the two T-shaped rivets 400 and the two rivets 500, and an assembly is very simple.

[0035] Preferably, a section of the bottom frame 20 is a closed-ring hollow tube structure. In this embodiment, inner and outer side edges of the section of the bottom frame 20 are vertical edges.

[0036] Certainly, the section of the bottom frame 20 can also be a non-closed ring structure. As shown in FIGS. 9-11, a side of the bottom frame 20 facing inward is an open structure. More preferably, the outer side edge of the section of the bottom frame 20 is a vertical edge, and a bottom edge of the section of the bottom frame 20 is a horizontal straight edge. In FIG. 9, an inner end of the bottom edge of the section of the bottom frame 20 is bent upward and toward the inner side of the bottom frame 20 to form a C-shaped extension segment 23. In FIG. 10, the inner end of the bottom edge of the section of the bottom frame 20 is bent upward and toward the inner side of the bottom frame 20 to form an inclined extension segment 23, and a distal end of the inclined extension segment 23 abuts the bottom edge of the section of the bottom frame 20. In FIG. 11, the inner end of the bottom edge of the section of the bottom frame 20 is bent upward and toward the inner side of the bottom frame 20 to form a horizontal extension segment 23 that overlaps and abuts the bottom edge of the section of the bottom frame 20.

[0037] Preferably, bent steps 24 are formed on both a top position and a bottom position of the outer side edge of the section of the bottom frame 20.

[0038] A structure of the panel 10 is also shown with reference to FIGS. 1-6. In this embodiment, the panel 10 is a vacuum-formed plastic panel. The panel 10 has a rectangular shape and has smooth transitions on four corners, and four sides of the panel 10 form an annular folded-downward edge 11 folded downward. A top surface of the bottom frame 20 comprises an annular installation groove 25 into which the annular folded-downward edge 11 is inserted from top to bottom.

[0039] A top portion of the bottom frame 20 is bent to form an annular inner blocking edge 26 and an annular outer pressing edge 27, and the annular installation groove 25 is formed between the annular inner blocking edge 26 and the annular outer pressing edge 27. The annular inner blocking edge 26 cooperates with the annular outer pressing edge 27 to tightly clamp and secure the annular folded-downward edge 11. More preferably, the annular inner blocking edge 26 is a vertical edge, the annular folded-downward edge 11 abuts the annular inner blocking edge 26 after being inserted into the annular installation groove 25, and the annular outer pressing edge 27 is bent inward to be deformed to tightly clamp and secure the annular folded-downward edge 11 during assembly. During assembly, the annular folded-downward edge 11 is inserted into the annular installation groove 25 from top to bottom, and then the annular inner blocking edge 26 is bent, the annular outer pressing edge 27 is bent, or the annular inner blocking edge 26 and the annular outer pressing edge 27 are bent inward together, finally allowing the annular inner blocking edge 26 to cooperate with the annular outer pressing edge 27 to tightly clamp and secure the annular folded-downward edge 11. That is, the annular folded-downward edge 11 can be freely inserted into the annular installation groove 25 before being secured, and either the annular inner blocking edge 26 or the annular outer pressing edge 27 is deformed or both the annular inner blocking edge 26 and the annular outer pressing edge 27 are deformed together to secure the annular folded-downward edge 11 by applying an external force. Therefore, after the seat board 100 is assembled, the annular inner blocking edge 26 cooperates with the annular outer pressing edge 27 to tightly clamp and secure the annular folded-downward edge 11.

[0040] Preferably, the top of the bottom frame 20 is continuously bent to form the annular inner blocking edge 26 and the annular outer pressing edge 27, and a bottom of the annular installation groove 25 has a smooth arc-shaped transition. It can be understood that the bottom frame 20 can be formed by rolling and bending a metal sheet material.

[0041] The annular inner blocking edge 26 and the annular outer pressing edge 27 are configured to fixedly clamp and secure the annular folded-downward edge 11. The annular inner blocking edge 26 can be higher than the annular outer pressing edge 27 (as shown in FIGS. 5 and 9), the annular inner blocking edge 26 can be lower than the annular outer pressing edge 27 (as shown in FIGS. 7 and 10), or the annular inner blocking edge 26 and the annular outer pressing edge 27 can have equal heights (as shown in FIGS. 8 and 11).

[0042] The aforementioned description is only preferred embodiments of the present disclosure, and the scope of the present disclosure cannot be therefore limited. That is, equivalent variations and modifications should still fall within the scope of the present disclosure provided that they are made based on the scope of the present disclosure and the content of the specification.