Folding chair adopting stable connecting piece

Abstract

A folding chair adopting a stable connecting piece comprises a chair frame, a chair seat and a chair back, the chair seat is movably installed on the chair frame, the chair back is installed at the top of the chair frame, the chair frame comprises a front foot stool and a rear foot stool, the top of the rear foot stool is hinged to the front foot stool, the front foot stool and the rear foot stool are connected through the connecting piece, and the connecting piece is connected with the chair seat. The front foot stool is embedded in the connecting groove of the connecting part, the rear foot stool is hinged to the hinge opening of the hinge part, the rear foot stool and the front foot stool are unfolded or folded through matched connection of the connecting piece, and the connecting piece can effectively improve the connecting strength of the connecting part during use. The structures of the front foot stool and the rear foot stool can be protected from being damaged, so that the connection stability is improved, the service life is longer, and the safety is higher; moreover, the front foot stool and the rear foot stool are matched with the connecting piece more tightly, the precision is higher, and the unfolding or folding angle is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of folding chairs, in particular to a folding chair with a stable connecting piece. Background Art

[0002] A folding chair is a seating product that is compactly designed to be easy to carry and store. It usually has a foldable frame and seat that can be easily folded up to save space when not in use.

[0003] Among the existing folding chairs, reference can be made to a folding chair frame and a folding chair disclosed in the Chinese utility model patent with patent application number CN202322898941.9, which includes a front foot frame and a rear foot frame, a seat frame and a backrest frame. The front foot frame and the rear foot frame are both U-shaped frames. The front foot frame and the rear foot frame extend obliquely and abut against each other when the folding chair is in an unfolded state; the rear side of the seat frame is hinged to the rear foot frame, and the front side of the seat frame is hinged to the front foot frame; the lower side of the backrest frame is hinged to the front foot frame and the rear foot frame. In this structure, two triangular structures are formed by the front foot frame, the rear foot frame, the seat frame and the backrest frame when the rear end of the seat frame is unfolded, and the rear foot frame abuts against the front foot frame to improve stability. When folding, after pressing the backrest frame, the front and rear foot frames will fold close to the seat frame, which is convenient to fold and small in size.

[0004] However, in the above structure, since the hinge points between the front foot frame, the rear foot frame and the seat frame are directly connected through connecting parts, this connection method will cause structural deformation or even loose connection after long-term use. In this case, during continued use, not only will abnormal noises be generated, but the connection may also become loose, posing certain safety hazards. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a folding chair using a stable connecting piece.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A folding chair using a stable connecting member, comprising a chair frame, a seat and a backrest. The seat is movably installed on the chair frame, and the backrest is installed on the top of the chair frame. The chair frame includes a front leg frame and a rear leg frame. The top of the rear leg frame is hinged to the front leg frame, and the front leg frame and the rear leg frame are fixedly connected by a connecting member. The connecting member includes a connecting portion for fixing on the front leg frame and a hinged portion for hinging on the top of the rear leg frame. One end of the hinged portion abuts against the connecting portion. A connecting groove for fitting the outer contour of the front leg frame is provided on the connecting portion, and a hinge opening for fitting the contour of the top of the rear leg frame is provided on the hinged portion. The front leg frame is fitted in the connecting groove, and the top of the rear leg frame is hinged in the hinge opening. A limiting block is further provided at one end of the inner side of the hinge opening close to the connecting portion, and the top of the rear leg frame abuts against the limiting block to form a support.

[0008] Further, the connecting portion, the hinged portion and the limiting block are integrally formed.

[0009] In the present utility model, bushings are provided on the inner sides of the connecting groove and the hinge opening, and the bushings enable the front leg frame and the rear leg frame to be in interference fit in the connecting groove and the hinge opening respectively.

[0010] Further, a flange structure is provided at the edge of the bushing in the hinge opening, and the flange structure corresponds to the edge contour of the hinge opening. A limiting groove is provided at the bottom of the bushing in the connecting groove, and a limiting protrusion is provided on the inner side of the connecting groove. The limiting groove is nested on the limiting protrusion.

[0011] In the present utility model, both the front leg frame and the rear leg frame are tubular structures. An insertion block is provided at the top of the rear leg frame, and an insertion rod extends from the lower end of the insertion block and is inserted into the top end of the rear leg frame. The top of the insertion block abuts against the limiting block to form a support.

[0012] Further, an arc-shaped guiding surface is provided on one side of the top of the insertion block close to the limiting block.

[0013] In the present utility model, a support plate for installing on the chair frame is provided at the bottom of the seat. The seat is fixed on the support plate and moves with the support plate. A first cross bar for supporting the front part of the support plate is provided on the front leg frame, and a second cross bar for supporting the rear part of the support plate is provided on the rear leg frame. The front part of the support plate is rotatably sleeved on the first cross bar, and the rear part of the support plate abuts against the second cross bar.

[0014] Further, a pressing seat is provided at the position of the rear part of the support plate corresponding to the second cross bar, and the support plate abuts against the second cross bar through the pressing seat.

[0015] Further, the first cross bar and the second cross bar are horizontally arranged and parallel to each other.

[0016] In the present utility model, connecting blocks are rotatably installed on both sides of the backrest. One end of each connecting block is inserted into the port at the top of the front leg frame. There is an angular limit between the connecting block and the backrest, and the connecting block provides front-back support for the backrest. An armrest is also rotatably installed on the outside of the connecting block. There is an angular limit between the armrest and the connecting block, and the connecting block provides up-down support for the armrest.

[0017] The present utility model has the following advantages and beneficial effects:

[0018] The front leg frame and the rear leg frame are connected by a connecting member. The front leg frame is embedded in the connecting groove of the connecting portion, and the rear leg frame is hinged in the hinge opening of the hinged portion. The connecting member is used to cooperate with the connection to realize the expansion or folding between the rear leg frame and the front leg frame. When in use, the connecting member can effectively improve the connection strength of the connection part, and can protect the structures of the front leg frame and the rear leg frame from being damaged, thereby improving the connection stability, having a longer service life and higher safety. Moreover, the cooperation between the front leg frame, the rear leg frame and the connecting member is closer and the accuracy is higher, making the expansion or folding angle more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0020] Figure 1 is a schematic diagram of the folding chair in this embodiment;

[0021] Figure 2 is an exploded view of the folding chair in this embodiment;

[0022] Figure 3 is Figure 2 an enlarged view of area A in

[0023] Figure 4 is the bottom view of the folding chair in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. The present utility model is not limited to the following embodiments.

[0025] Such as Figures 1 to 4As shown in the figure, this embodiment discloses a folding chair using a stable connecting member, which includes a chair frame 1, a seat 2, and a backrest 3. The seat 2 is movably installed on the chair frame 1, and the backrest 3 is installed on the top of the chair frame 1. The chair frame 1 includes a front leg frame 11 and a rear leg frame 12. The top of the rear leg frame 12 is hinged to the front leg frame 11. The rear leg frame 12 can be folded or expanded relative to the front leg frame 11. In order to make the connection between the front leg frame 11 and the rear leg frame 12 more stable, a connecting member 4 is fixedly connected between the front leg frame 11 and the rear leg frame 12. The connecting member 4 includes a connecting portion 41 for fixing on the front leg frame 11 and a hinged portion 42 for hinging on the top of the rear leg frame 12. One end of the hinged portion 42 abuts against the connecting portion 41 to make the connecting member 4 in a "7" - shaped structure. Specifically, a connecting groove 410 for matching the outer contour of the front leg frame 11 is provided on the connecting portion 41, and a hinge opening 420 for matching the top contour of the rear leg frame 12 is provided on the hinged portion 42. The front leg frame 11 is embedded in the connecting groove 410 and is fixedly connected by a fastener passing through the connecting portion 41 and the front leg frame 11. The top of the rear leg frame 12 is hinged in the hinge opening 420 and is fixedly connected by a fastener passing through the hinged portion 42 and the rear leg frame 12. Preferably, the fastener is a bolt or other fixable components. In order to fix the angle between the rear leg frame 12 and the front leg frame 11 when they are expanded, a limiting block 43 is further provided at one end of the inner side of the hinge opening 420 close to the connecting portion 41. When the rear leg frame 12 is expanded, the part of the rear leg frame 12 above the hinge point abuts against the limiting block 43 to achieve angle fixation. Preferably, the connecting portion 41, the hinged portion 42, and the limiting block 43 are integrally formed.

[0026] In this embodiment, in order to improve the fastening effect between the connecting member 4 and the front leg frame 11 and the rear leg frame 12, bushings 44 are provided on the inner sides of both the connecting groove 410 and the hinge opening 420. The bushings 44 are made of a material with a certain flexibility. Through the bushings 44, the front leg frame 11 and the rear leg frame 12 are respectively in interference fit in the connecting groove 410 and the hinge opening 420. By setting the bushings 44, the friction between the connecting member 4 and the front leg frame 11 and the rear leg frame 12 can be increased to avoid slippage. Preferably, on the bushing 44 in the hinge opening 420, a flange structure 441 is provided at its edge, and the flange structure 441 corresponds to the edge contour of the hinge opening 420. On the bushing 44 in the connecting groove 410, a limiting groove 442 is provided at the bottom of the bushing 44, and a limiting protrusion 411 is provided on the inner side of the connecting groove 410. The limiting groove 442 is nested on the limiting protrusion 411. Through the cooperation of the flange structure 441 and the limiting groove 442 on the bushing 44, the fit between the bushing 44 and the connecting groove 410 and the hinge opening 420 is made more tight, avoiding the displacement or misalignment of the bushing 44 during multiple folding or unfolding processes.

[0027] In this embodiment, both the front leg frame 11 and the rear leg frame 12 are tubular structures with hollow interiors. However, when the top of the rear leg frame 12 abuts against the limit block 43, structural deformation is likely to occur. Therefore, an insertion block 13 is provided at the top of the rear leg frame 12. A plug rod 131 extends from the lower end of the insertion block 13, and the plug rod 131 is inserted into the top end of the rear leg frame 12. Preferably, the plug rod 131 is in interference fit with the port of the rear leg frame 12, and the top of the insertion block 13 abuts against the limit block 43. Using the insertion block 13 to replace the top of the rear leg frame 12 pressing against the limit block 43 can not only ensure the structural integrity of the rear leg frame 12 but also improve the connection tightness between components, thereby enhancing the limiting effect. Specifically, when the rear leg frame 12 rotates relative to the front leg frame 11, interference will occur between the insertion block 13 and the hinge portion 42. Therefore, an arc-shaped guiding surface 132 is provided on one side of the top of the insertion block 13 close to the limit block 43.

[0028] In this embodiment, a support plate 5 for mounting on the chair frame 1 is provided at the bottom of the seat 2. The seat 2 is fixed to the support plate 5 and moves with the support plate 5. A first cross bar 111 for supporting the front part of the support plate 5 is provided on the front leg frame 11, and a second cross bar 121 for supporting the rear part of the support plate 5 is provided on the rear leg frame 12. Specifically, the first cross bar 111 and the second cross bar 121 are horizontally arranged and parallel to each other. The front part of the support plate 5 is rotatably sleeved on the first cross bar 111, and the rear part of the support plate 5 presses against the second cross bar 121. Preferably, in order to improve the stability of the support plate 5, a pressing seat 51 is provided at the rear part of the support plate 5 corresponding to the position of the second cross bar 121, and the support plate 5 presses against the second cross bar 121 through the pressing seat 51.

[0029] In this embodiment, connection blocks 31 are rotatably installed on both sides of the backrest 3. One end of the connection block 31 is inserted into the port at the top of the front leg frame 11 for fixation. Preferably, there is an angular limit between the connection block 31 and the backrest 3 to provide front and rear support for the backrest 3. Further, an armrest is rotatably installed on the outside of the connection block 31, and there is an angular limit between the armrest and the connection block 31 to provide up and down support for the armrest.

[0030] The above content described in this specification is only an example of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the content of this specification of the present invention or exceed the scope defined by this claim book, they should fall within the protection scope of the present invention.

Claims

1. A folding chair using a stable connection member, comprising a chair frame (1), a seat (2) and a chair back (3), wherein the seat (2) is movably mounted on the chair frame (1), and the chair back (3) is mounted on the top of the chair frame (1), characterized in that: The chair frame (1) comprises a front foot frame (11) and a rear foot frame (12), the top of the rear foot frame (12) is hinged to the front foot frame (11), the front foot frame (11) and the rear foot frame (12) are fixedly connected via a connecting member (4), the connecting member (4) comprises a connecting portion (41) for fixing to the front foot frame (11) and a hinged portion (42) for hinged to the top of the rear foot frame (12), one end of the hinged portion (42) abuts against the connecting portion (41), and the connecting portion (41) is provided with a A connecting groove (410) is provided for matching the outer contour of the front tripod (11); a hinge port (420) is provided on the hinged portion (42) for matching the top contour of the rear tripod (12); the front tripod (11) is embedded in the connecting groove (410); the top of the rear tripod (12) is hinged in the hinge port (420); a limit block (43) is provided on the inner side of the hinge port (420) at one end close to the connecting portion (41); the top of the rear tripod (12) abuts against the limit block (43) to form support.

2. A folding chair with a stable connection member according to claim 1, characterized in that: The connecting portion (41), the hinged portion (42) and the limiting block (43) are integrally formed.

3. A folding chair with a stable connection member according to claim 1, characterized in that: Bushings (44) are provided on the inner sides of the connection groove (410) and the hinge joint (420), and the bushings (44) enable the front leg frame (11) and the rear leg frame (12) to be interference-fitted in the connection groove (410) and the hinge joint (420), respectively.

4. A folding chair with a stable connection member according to claim 3, characterized in that: A flange structure (441) is provided at the edge of the bushing (44) in the hinge joint (420), and the flange structure (441) corresponds to the edge profile of the hinge joint (420). A limiting groove (442) is provided at the bottom of the bushing (44) in the connecting groove (410), and a limiting protrusion (411) is provided on the inner side of the connecting groove (410), and the limiting groove (442) is nested on the limiting protrusion (411).

5. A folding chair with a stable connection member according to claim 1, characterized in that: The front tripod (11) and the rear tripod (12) are both tubular structures. An insert block (13) is provided at the top of the rear tripod (12). An insert rod (131) extends from the lower end of the insert block (13). The insert rod (131) is inserted into the top end of the rear tripod (12). The top of the insert block (13) abuts against the limit block (43) to form a support.

6. A folding chair with a stable connection member according to claim 5, characterized in that: A curved guide surface (132) is provided on one side of the top of the insert block (13) close to the limit block (43).

7. A folding chair with a stable connection member according to claim 1, characterized in that: A support plate (5) for mounting on the chair frame (1) is provided at the bottom of the seat (2); the seat (2) is fixed on the support plate (5) and moves with the support plate (5); a first cross bar (111) for supporting the front of the support plate (5) is provided on the front foot frame (11); a second cross bar (121) for supporting the rear of the support plate (5) is provided on the rear foot frame (12); the front of the support plate (5) is rotatably sleeved on the first cross bar (111), and the rear of the support plate (5) is pressed against the second cross bar (121).

8. A folding chair with a stable connection member according to claim 7, characterized in that: A pressing seat (51) is provided at the rear of the support plate (5) at a position corresponding to the second cross bar (121), and the support plate (5) is pressed against the second cross bar (121) via the pressing seat (51).

9. A folding chair with a stable connection member according to claim 7, characterized in that: The first cross bar (111) and the second cross bar (121) are arranged horizontally and parallel to each other.

10. A folding chair with a stable connection member according to claim 1, characterized in that: Connecting blocks (31) are rotatably mounted on both sides of the chair back (3), one end of the connecting block (31) is inserted into a port at the top of the front leg frame (11), an angle limit exists between the connecting block (31) and the chair back (3), and front and rear support is provided for the chair back (3); an armrest is also rotatably mounted on the outer side of the connecting block (31), an angle limit exists between the armrest and the connecting block (31), and upper and lower support is provided for the armrest.

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