Folding chair

Abstract

A folding chair comprises a chair body, the two sides of the chair body are provided with a left connecting beam and a right connecting beam respectively, the left connecting beam and the right connecting beam extend backwards to form a rear supporting part, the left connecting beam and the right connecting beam are each provided with a hinge part, and front supporting legs are hinged to the hinge parts through hinge shafts. Limiting pieces are arranged on the outer sides of the left connecting beam and the right connecting beam; the limiting piece is provided with a connecting part and a limiting part, the connecting part of the limiting piece is fixed to the hinge part through a fastener, and when the folding chair is unfolded, the limiting part of the limiting piece abuts against the front supporting leg to prevent the upper end of the front supporting leg from moving backwards with the hinge shaft as the rotation center, so that a user does not have the backward displacement feeling when sitting down; the limiting pieces share a part of backward force, and the limiting pieces are located above the hinged shafts of the front supporting legs and the connecting beams, so that the limiting pieces can share more backward force borne by the front supporting legs, and the force borne by the hinged positions of the front supporting legs and the connecting beams is reduced.

Description

Technical Field

[0001] This utility model relates to the field of chair technology, specifically to a folding chair. Background Technology

[0002] Folding chairs have appeared on the market to make it easier for people to sit and rest during outdoor activities. However, most folding chairs are connected by bolts, and the materials of the chairs are usually wood or plastic. Over time, the bolts will wear down the bolt holes, causing the chair to loosen. When a person sits on it, the parts may shift, affecting the user experience.

[0003] Patent document CN 220494637 U discloses an outdoor chair, including a chair body, front support legs on both sides of the chair body, and a rear support leg extending from the side of the front support leg. The front support leg and the rear support leg are connected by a pivot. The front support leg can rotate and fold around the pivot. The connection between the front support leg and the rear support leg is provided with a groove and an arc-shaped installation path. The front support leg is provided with a large pad corresponding to the groove and a small pad that can slide on the arc-shaped installation path. With the above structure, the connection between the chair and the chair leg reduces the friction between the bolt and the threaded hole after bearing pressure. Under long-term use, the threaded hole of the chair is not easy to deform or loosen, preventing the occurrence of safety hazards.

[0004] However, when a person sits down in this type of chair, there is a backward impact force. After prolonged use, sitting backward will cause a wobbling sensation, with the front support legs moving backward relative to the main body of the chair, resulting in a poor user experience. Summary of the Invention

[0005] The problem this invention aims to solve is the technical issue of the front support leg moving backward when the user impacts the chair while sitting.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A folding chair includes a seat body, with a left connecting beam and a right connecting beam on each side of the seat body. The left and right connecting beams extend rearward to form a rear support portion. Both the left and right connecting beams have a hinge portion at the front end. A front support leg is hinged to the hinge portion via a hinge shaft. A limiting member is provided on the outer side of both the left and right connecting beams, and the limiting member is located above the hinge shaft. A receiving cavity is provided in the hinge portion. The limiting member has a connecting portion and a limiting portion. The connecting portion of the limiting member is fixed in the receiving cavity by a fastener. When the folding chair is opened, the limiting portion of the limiting member abuts against the front support leg to prevent the upper end of the front support leg from moving rearward around the hinge shaft as the rotation center.

[0007] This design incorporates a cavity in the hinge section, within which a limiting component is fixed. The limiting part of the limiting component extends outward from the connecting beam. When the folding chair is opened, the front support legs abut against the limiting part, and the limiting component distributes some of the backward force. Furthermore, the limiting component is located above the hinge axis between the front support leg and the connecting beam, allowing it to distribute more of the backward force on the front support leg, reducing the force at the hinge point and making the hinge less prone to wear and damage. At the same time, the limiting component restricts the backward movement of the front support leg, preventing the user from experiencing a backward displacement when sitting down, thus improving the user experience. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0009] Figure 2 This is a schematic diagram of the overall structure from another perspective of an embodiment of the present utility model;

[0010] Figure 3 This is an exploded structural diagram of an embodiment of the present utility model;

[0011] Figure 4 for Figure 3 Enlarged diagram of point A in the middle. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] like Figures 1 to 4 As shown, a folding chair includes a seat body 1. The seat body 1 has a left connecting beam 11 and a right connecting beam 12 on both sides. The seat body 1 also includes a backrest assembly 15, which includes a bottom beam 151 and an upper beam 152. A connecting plate 153 is connected between the ends of the bottom beam 151 and the upper beam 152 on both sides. Five backrest panels 154 are connected between the front sides of the bottom beam 151 and the upper beam 152. The front sides of the bottom beam 151 and the upper beam 152 are curved surfaces, and the backrest panels 154 are arranged along the curved surfaces, so that the backrest panels 154 can better conform to the curve of the human back, reduce the concentration of back pressure points, and thus reduce the fatigue of the user's back muscles.

[0014] The left connecting beam 11 and the right connecting beam 12 extend rearward to form a rear support portion 13. A limiting groove 10 is provided on the rear support portion 13. When the folding chair is opened, the bottom beam 151 is placed in the limiting groove 10, which can accurately position the backrest and prevent the backrest from swaying back and forth or left and right during use. The two ends of the bottom beam 151 are respectively hinged to the left connecting beam 11 and the right connecting beam 12 with connecting pieces 6, so that the backrest assembly 15 can rotate flexibly within a certain range, which is convenient for folding the chair. Six seat plates 16 are provided above the left connecting beam 11 and the right connecting beam 12. An avoidance notch 161 is provided on the seat plate 16 near the backrest plate 154. The avoidance notch 161 is located on the side near the backrest plate 154, and the bottom of the backrest plate 154 is located at the avoidance notch 161. This makes the backrest plate 154 and the seat plate 16 closer together, so that the user will not feel uncomfortable due to the large gap between the backrest plate 154 and the seat plate 16 when sitting.

[0015] In this embodiment, both the left connecting beam 11 and the right connecting beam 12 have a hinge portion 14 located at the front end. A front support leg 3 is hinged to the hinge portion 14 via a hinge shaft 2. When the folding chair is folded up, the upper end of the front support leg 3 rotates forward around the hinge shaft 2, and the lower end of the front support leg 3 rotates backward around the hinge shaft 2. The backrest 154 folds toward the seat plate 16 until it abuts against the seat plate.

[0016] like Figures 3 to 4 As shown, in this embodiment, limiting members 4 are provided on the outer sides of both the left connecting beam 11 and the right connecting beam 12. The limiting members 4 are located above the hinge shaft 2 and have a connecting part 41 and a limiting part 42. A receiving cavity 141 is provided on the hinge part 14, and the connecting part 41 of the limiting member 4 is placed in the receiving cavity 141. The connecting part 41 is fixed in the receiving cavity 141 by fasteners. A fastening hole 411 and two fixing holes 412 are provided on the connecting part 41. Both the connecting beam 11 and the right connecting beam 12 have a first through hole 101 and two second through holes 102 in their accommodating cavities 141. The fasteners include a first fastener 5 and a second fastener 20. The first fastener 5 passes through the fastening hole 411 and the first through hole 101, and the second fastener 20 passes through the fixing hole 412 and the second through hole 102. The limiting member 4 is fixed in the accommodating cavities 141 on the left connecting beam 11 and the right connecting beam 12 by the first fastener 5 and the second fastener 20.

[0017] With the cooperation of the receiving cavity 141 and the limiting member 4, the installation position of the limiting member 4 can be quickly positioned when installing the chair. If the limiting member 4 is damaged or worn during use and needs to be repaired or replaced, it is convenient to remove the damaged limiting member 4 from the receiving cavity 141 by disassembling the first fastener 5 and the second fastener 20, and then replace it with a new limiting member 4 and fix it again. Its limiting part 42 extends outward from the connecting part 41. When the folding chair is opened, the limiting part 42 abuts against the upper end of the front support leg 3 to prevent the upper end of the front support leg 3 from moving backward with the hinge shaft 2 as the rotation center.

[0018] like Figures 3 to 4 As shown, in this embodiment, the first fastener 5 includes a left fastener 51 and a right fastener 52; a nut 50 is connected between the left fastener 51 and the right fastener 52, and the tails of the left fastener 51 and the right fastener 52 are provided with external threads, the external threads of the left fastener 51 and the right fastener 52 are in opposite directions, and the two ends of the nut 50 are provided with internal threads, the internal threads of the two ends of the nut 50 are in opposite directions.

[0019] During installation, the left fastener 51 passes through the fastening hole 411 of the connecting part 41 and the first through hole 101 on the left connecting beam 11, and is screwed into the left end of the nut 50. The right fastener 52 passes through the fastening hole 411 of the connecting part 41 and the first through hole 101 on the right connecting beam 12, and is screwed into the right end of the nut 50.

[0020] When the chair is used for a long time, because the chair is made of materials such as plastic or wood, while the first fastener 5 and the second fastener 20 are made of metal, the sides of the first through hole 101 and the second through hole 102 on the connecting beam will wear continuously. This may cause the first fastener 5 and the second fastener 20 to loosen, thereby causing the limiting member 4 to loosen. Since the upper end of the front support leg 3 abuts against the limiting part 42 of the limiting member 4, the loosening of the limiting member 4 may also cause the hinge joint 14 between the front support leg 3 and the connecting beam to loosen, which is not good for the user's experience.

[0021] Therefore, when the limiting member 4 is loose, the nut member 50 can be turned. Since the external threads on the left fastener 51 and the right fastener 52 are in opposite directions, turning the nut member 50 in one direction will cause both ends of the nut member 50 to move outward or inward simultaneously. When the nut member 50 is turned in one direction, causing both ends of the nut member 50 to move inward, it pulls the left fastener 51 and the right fastener 52 toward the center of the nut member 50, shortening the distance between the left fastener 51 and the right fastener 52. In this embodiment, the fastening hole 411 is a countersunk hole. The heads of the left fastener 51 and the right fastener 52 are stuck in the countersunk hole, pulling the limiting member 4 to be fixed in the receiving cavity 141. At the same time, the head of the first fastener 5 cooperates with the countersunk hole, making it impossible for the left fastener 51 and the right fastener 52 to rotate. By turning the nut member 50, the limiting member 4 is firmly fixed in the receiving cavity 141 again.

[0022] like Figure 1 As shown, in this embodiment, a front baffle 17 is connected between the front ends of the left connecting beam 11 and the right connecting beam 12, and a limiting plate 31 is connected between the front support legs 3 on the left and right sides of the seat. When the folding chair is opened, the front side of the limiting plate 31 abuts against the rear side of the front baffle 17. When the chair is opened to the maximum extent, the front side of the limiting plate 31 abuts against the rear side of the front baffle 17, and the front baffle 17 bears part of the force of the front support legs 3 backward, reducing the pressure on the limiting member 4 and making the limiting member 4 less prone to damage.

[0023] like Figures 2 to 3 As shown, in this embodiment, a support beam 7 is hinged between the connecting plate 153 and the outer side of the front support leg 3, and a reinforcing block 8 is hinged between the support beam 7 and the connecting plate 153. The reinforcing block 8 is fixedly connected to the support beam 7. A handrail 9 is connected above the support beam 7, and a reinforcing plate 32 is connected between the handrail 9 and the front support leg 3. The top of the reinforcing plate 32 is connected to the bottom of the handrail 9, and the side adjacent to the front support leg 3 is connected to the front support leg 3. This provides additional support to the handrail 9, enabling it to withstand greater weight without swaying or sinking. The reinforcing plate tightly connects the handrail and the front support leg together, enhancing the load-bearing capacity and stability of the handrail.

[0024] In this embodiment, a clearance groove 71 is provided on the right-side support beam 7, and a cup holder assembly 91 is hinged to the bottom of the armrest 9 connected to the right-side support beam 7. The cup holder assembly 91 can be folded into the clearance groove 71. When the user needs to place cups or other beverage containers, the cup holder assembly 91 can be unfolded from the clearance groove 71, providing a place for the user to place beverages, teacups, etc. When the cup holder assembly 91 is not in use or when the folding chair needs to be moved, the cup holder assembly 91 can be folded into the clearance groove 71 to prevent the cup holder assembly 91 from being bumped or damaged during the movement. At the same time, when the chair is folded up, the cup holder assembly 91 folded into the clearance groove 71 will not be deformed due to being squeezed by other items, thus extending the service life of the cup holder assembly 91.

[0025] In the above design, limiting members 4 are set on the outer side of the left connecting beam 11 and the right connecting beam 12. When the folding chair is opened, the limiting part 42 of the limiting member 4 abuts against the upper end of the front support leg 3, which reduces the force at the hinge point between the front support leg and the connecting beam. At the same time, the limiting member restricts the backward movement of the front support leg, so that the user will not have a backward displacement when sitting down, thus improving the user experience.

Claims

1. A folding chair comprising a seat body (1), both sides of the seat body (1) are respectively provided with a left connecting beam (11) and a right connecting beam (12), the left connecting beam (11) and the right connecting beam (12) extend backward to form a rear support part (13), the left connecting beam (11) and the right connecting beam (12) are both provided with a hinged part (14) at the front end, and a front support leg (3) is hinged to the hinged part (14) through a hinge shaft (2), characterized in that: A limiting piece (4) is arranged on the outer side of the left connecting beam (11) and the right connecting beam (12), and the limiting piece (4) is located above the hinge shaft (2); A containing cavity (141) is arranged on the hinge part (14), the limiting piece (4) has a connecting part (41) and a limiting part (42), the connecting part (41) is fixed in the containing cavity (141) through a fastener, when the folding chair is opened, the limiting part (42) blocks the front supporting leg (3), and the upper end of the front supporting leg (3) is prevented from moving backward with the hinge shaft (2) as the rotation center.

2. The folding chair of claim 1, wherein: The seat body (1) comprises a backrest assembly (15), the backrest assembly (15) comprises a bottom beam (151) and an upper beam (152), a connecting plate (153) is connected between the two ends of the bottom beam (151) and the upper beam (152), and more than one backrest plate (154) is connected between the front side of the bottom beam (151) and the upper beam (152).

3. The folding chair of claim 2, wherein: Limiting grooves (10) are arranged on the left connecting beam (11) and the right connecting beam (12), and the bottom beam (151) is arranged in the limiting grooves (10) when the folding chair is opened; the two ends of the bottom beam (151) are respectively hingedly connected with the left connecting beam (11) and the right connecting beam (12) through connecting pieces (6).

4. The folding chair of claim 2, wherein: More than one seat plate (16) is arranged above the left connecting beam (11) and the right connecting beam (12), an avoiding gap (161) is arranged on the seat plate (16) close to the backrest plate (154), and the bottom of the backrest plate (154) is located at the avoiding gap (161).

5. The folding chair of claim 1, wherein: A front baffle (17) is connected between the front ends of the left connecting beam (11) and the right connecting beam (12), and a limiting plate (31) is connected between the front supporting legs (3) on the left and right sides of the seat; the front side of the limiting plate (31) abuts against the rear side of the front baffle (17) when the folding chair is opened.

6. The folding chair of claim 2, wherein: A supporting beam (7) is hingedly connected between the connecting plate (153) and the outer side of the front supporting leg (3), a reinforcing block (8) is hingedly connected between the supporting beam (7) and the connecting plate (153), the reinforcing block (8) is fixedly connected with the supporting beam (7), and a handrail part (9) is connected above the supporting beam (7).

7. The folding chair of claim 6, wherein: A reinforcing plate (32) is connected between the handrail part (9) and the front supporting leg (3), the top of the reinforcing plate (32) is connected with the bottom of the handrail part (9), and the adjacent side close to the front supporting leg (3) is connected with the front supporting leg (3).

8. The folding chair of claim 6, wherein: An avoiding groove (71) is arranged on the supporting beam (7) on the left side or the right side, the bottom of the handrail part (9) connected with the supporting beam (7) is hingedly connected with a cup holder assembly (91), and the cup holder assembly (91) can be folded into the avoiding groove (71).

9. The folding chair of claim 1, wherein: A fastening hole (411) and more than one fixing hole (412) are arranged on the connecting part (41) of the limiting piece (4), a first through hole (101) and more than one second through hole (102) are arranged on the side edges of the left connecting beam (11) and the right connecting beam (12). The fastener comprises a first fastener (5) and a second fastener (20), the first fastener (5) is used to fix the limiting piece (4) in the accommodating cavity (141) through the fastening hole (411) and the first through hole (101), the second fastener (20) is used to fix the limiting piece (4) in the accommodating cavity (141) through the fixing hole (412) and the second through hole (102), and the limiting piece (4) is fixed on the left connecting beam (11) and the right connecting beam (12) through the first fastener (5) and the second fastener (20).

10. The folding chair of claim 9, wherein: The first fastener (5) comprises a left fastener (51) and a right fastener (52), and a nut piece (50) is connected between the left fastener (51) and the right fastener (52); the tail portions of the left fastener (51) and the right fastener (52) are provided with external threads, the directions of the external threads of the left fastener (51) and the right fastener (52) are opposite, and the two ends of the nut piece (50) are provided with internal threads, and the directions of the internal threads of the two ends of the nut piece (50) are opposite.

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