A hinged folding chair

Abstract

The utility model discloses a hinge type folding chair relates to hinge type folding chair technical field, including chair seat, the upper portion of chair seat is hinged with chair back, the lower portion fixedly connected with self -locking hinge of chair seat, one side fixedly connected with support leg of self -locking hinge, the lower portion fixedly connected with the stopper of chair seat, the outside of support leg is pasted with one side of stopper, the inside of support leg is equipped with the sliding slot, the inside sliding connection of sliding slot has the sliding block, one side fixedly connected with support rod of sliding block, the inside of support leg is provided with reinforcing plate. The utility model discloses the setting of stopper has had the effect of supporting and reinforcing to support leg outside, through the cooperation setting of sliding block, sliding slot, support rod and contraction groove, can support the inside of support leg in the process of using to the effect of dispersion self -locking hinge stress has been played to the purpose that has reached the increase folding chair stability.

Description

Technical Field

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

[0002] A hinged folding chair is a portable seat that connects the seat and backrest via metal hinges. Its core design utilizes the hinge's rotation mechanism for quick opening and closing. The legs typically employ a cross-shaped X-structure, secured by a central bolt, creating a stable triangular support when unfolded and collapsing when folded. The seat surface is often made of canvas, plastic, or wood, balancing load-bearing capacity with lightweight design. The hinges are usually equipped with springs or latches to ensure automatic locking when unfolded, and unlocking by pressing a release button. This structure significantly reduces storage space while maintaining functionality, making it suitable for impromptu meetings, outdoor activities, and other similar scenarios. Typical load-bearing capacity is approximately 100-150 kg. Some high-end models include a backrest angle adjustment hinge for enhanced comfort.

[0003] Currently, existing hinged folding chairs typically use self-locking hinges for connection. While these hinges can lock in place, when the chair is unfolded, its stability is poor because it is only secured by these hinges, making it prone to wobbling. Furthermore, the hinges are under continuous stress, making them susceptible to damage and requiring replacement. Additionally, the small contact area between the folding chair's support legs and the ground makes it prone to digging into the ground on soft surfaces, causing tilting or instability. The support legs also cannot adapt to complex terrain. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hinged folding chair, solving the problems mentioned in the background section. To achieve the above objectives, this utility model employs the following technical solution: It includes a seat, with a backrest hinged to the upper part of the seat. A self-locking hinge is fixedly connected to the lower part of the seat, and a support leg is fixedly connected to one side of the self-locking hinge. A stop block is fixedly connected to the lower part of the seat, with one side of the stop block abutting against the outer side of the support leg. A groove is formed on the inner side of the support leg, and a slider is slidably connected inside the groove. A support rod is fixedly connected to one side of the slider. A reinforcing plate is provided inside the support leg, and a plug rod is slidably connected to one side of the support leg. An insertion hole is formed on one side of the reinforcing plate, and a plug rod is inserted into the insertion hole. A limiting rod is fixedly connected to one side of the reinforcing plate, and the limiting rod slides within a limiting groove in the support leg.

[0005] Optionally, the top of the support leg fits into the seat when it is extended, and the lower part of the seat has a retraction groove, in which a support rod and a slider are slidably connected.

[0006] Optionally, the limiting groove and the limiting rod are closely fitted, the cross-section of the limiting groove and the limiting rod is T-shaped, and an insertion hole is provided on each side of the limiting rod.

[0007] Optionally, a movable plate is fixedly connected to one side of the insertion rod, one side of the movable plate is in contact with the support leg, and a support spring for supporting the insertion rod and the support leg is provided.

[0008] Optionally, the insertion hole and the insertion rod fit closely together. When the reinforcing plate is unfolded, the insertion rod is inserted into the insertion hole. When the reinforcing plate is folded, the inner side of the insertion rod clamps the reinforcing plate.

[0009] Optionally, the shape of the shrinkage groove is consistent with the shape of the support rod and the slider, the two sides of the shrinkage groove are consistent with the shape of the slide groove and their positions correspond, and the support rod is located in the middle of the support leg.

[0010] This utility model provides a hinged folding chair, which has the following advantages:

[0011] 1. This hinged folding chair, through the setting of the stop block, has the effect of reinforcing the outer side of the support leg. Through the cooperation of the slider, slide groove, support rod and retraction groove, it can support the inner side of the support leg during use, thereby dispersing the force of the self-locking hinge and achieving the purpose of increasing the stability of the folding chair.

[0012] 2. This hinged folding chair, through the setting of limiting rods, reinforcing plates and limiting grooves, has the effect of stable folding and unfolding. Through the cooperation of movable plates, insert rods and insert holes, the reinforcing plates can be fixed during use, thereby increasing the adaptability of the folding chair to the ground and achieving the purpose of adapting the bottom of the support legs to complex terrain. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the folding chair of this utility model;

[0014] Figure 2 This is a three-dimensional cross-sectional structural diagram of the folding chair of this utility model;

[0015] Figure 3 This utility model Figure 2 A magnified structural diagram of part A in the middle;

[0016] Figure 4 This is a three-dimensional structural diagram of the folding chair of this utility model;

[0017] Figure 5 This utility model Figure 4 A magnified structural diagram of section B in the middle;

[0018] Figure 6 This is a three-dimensional structural diagram of the folding chair of this utility model;

[0019] Figure 7 This is a three-dimensional cross-sectional structural diagram of the folding chair of this utility model.

[0020] In the diagram: 1. Seat; 2. Backrest; 3. Stop; 4. Self-locking hinge; 5. Support leg; 6. Movable plate; 7. Reinforcing plate; 8. Support rod; 9. Insert rod; 10. Limiting rod; 11. Insertion hole; 12. Limiting groove; 13. Slider; 14. Slide groove; 15. Shrinkage groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example

[0023] Please see Figures 1 to 7 The present invention provides a technical solution including a chair seat 1, a chair back 2 hinged to the upper part of the chair seat 1, a self-locking hinge 4 fixedly connected to the lower part of the chair seat 1, a support leg 5 fixedly connected to one side of the self-locking hinge 4, a stop block 3 fixedly connected to the lower part of the chair seat 1, one side of the stop block 3 fitting against the outer side of the support leg 5, a sliding groove 14 opened on the inner side of the support leg 5, a slider 13 slidably connected inside the sliding groove 14, a support rod 8 fixedly connected to one side of the slider 13, a reinforcing plate 7 provided inside the support leg 5, an insert rod 9 slidably connected to one side of the support leg 5, an insertion hole 11 opened on one side of the reinforcing plate 7, an insert rod 9 inserted inside the insertion hole 11, a limiting rod 10 fixedly connected to one side of the reinforcing plate 7, and the limiting rod 10 sliding within the limiting groove 12 opened in the support leg 5.

[0024] Specifically, the self-locking hinge 4 can be self-locked when unfolded and folded, the backrest 2 is tilted backward, and the outer side of the support leg 5 has a groove that cooperates with the stop block 3.

[0025] Please refer to Figure 2. Figure 4 , Figure 6 When the support leg 5 is extended, its top fits against the seat 1. The lower part of the seat 1 has a retraction groove 15, and the support rod 8 and the slider 13 are slidably connected inside the retraction groove 15.

[0026] Specifically, the shrinkage groove 15 stores the support rod 8 and the slider 13.

[0027] Please refer to Figure 1 to Figure 7The limiting groove 12 fits closely with the limiting rod 10. The cross-section of the limiting groove 12 and the limiting rod 10 is T-shaped. An insertion hole 11 is provided on each side of the limiting rod 10.

[0028] Specifically, the limiting groove 12 passes through the support leg 5, and the limiting rod 10 rotates and slides up and down within the limiting groove 12.

[0029] Please refer to Figure 1 to Figure 5 A movable plate 6 is fixedly connected to one side of the insertion rod 9. One side of the movable plate 6 is in contact with the support leg 5. A support spring is provided between the insertion rod 9 and the support leg 5 to provide support.

[0030] Specifically, the support spring has a reset function. The support spring pushes the insertion rod 9 out of the support leg 5. When the insertion rod 9 is extended, the support spring is in a normal, unforced state.

[0031] Please refer to Figure 1 to Figure 5 The insertion hole 11 and the insertion rod 9 fit closely together. When the reinforcing plate 7 is unfolded, the insertion rod 9 is inserted into the insertion hole 11. When the reinforcing plate 7 is folded, the inner side of the insertion rod 9 clamps the reinforcing plate 7.

[0032] Please refer to Figure 2. Figure 4 , Figure 6 The shape of the shrinkage groove 15 is consistent with the shape of the support rod 8 and the slider 13. The two sides of the shrinkage groove 15 are consistent with the shape of the slide groove 14 and their positions correspond. The support rod 8 is located in the middle of the support leg 5.

[0033] Specifically, when the support leg 5 is unfolded, the retraction groove 15 corresponds to the slide groove 14, and the slider 13 can slide inside the slide groove 14 and the retraction groove 15. When folded, the support leg 5 supports the support rod 8.

[0034] In use, the backrest 2 is rotated around the hinge, and the lower part of the backrest 2 is supported by the seat 1, thus fixing the backrest 2. Then, it is rotated outward around the self-locking hinge 4, causing the upper end of the support leg 5 to fit against the seat 1. The self-locking hinge 4 then locks in place. The stop block 3 at the bottom of the seat 1 supports the outer side of the support leg 5, thus resisting outward force. The stop block 3 reinforces the outer side of the support leg 5. When the support leg 5 is extended, it is in a retracted position. The slider 13 in the retraction groove 15 slides downwards, and the two sides of the retraction groove 15 correspond to the slide groove 14, so that the slider 13 slides into the slide groove 14. The support rod 8 supports the inner side of the support leg 5, dispersing the force on the self-locking structure of the self-locking hinge 4. Through the coordinated arrangement of the slider 13, slide groove 14, support rod 8 and retraction groove 15, the inner side of the support leg 5 can be supported during use, thereby dispersing the force on the self-locking hinge 4 and achieving the purpose of increasing the stability of the folding chair.

[0035] On hard surfaces, the folding chair can be unfolded directly for use. However, on softer surfaces, the folding chair is prone to sinking and tilting, resulting in poor stability. Rotating the reinforcing plate 7 around the limiting rod 10 as the center, until the reinforcing plate 7 is perpendicular to the support leg 5, allows it to slide downwards until the limiting rod 10 reaches the bottom of the limiting groove 12. The bottom of the reinforcing plate 7 and the bottom of the support leg 5 remain at the same horizontal plane. Through the arrangement of the limiting rod 10, the reinforcing plate 7, and the limiting groove 12, a stable folding and unfolding structure is achieved. Furthermore, the support spring inside the support leg 5 provides support for the top of the insert rod 9. The movement allows the insert rod 9 to be inserted into the insertion hole 11 of the reinforcing plate 7, with one insert rod 9 on each side to ensure the stability of the reinforcing plate 7. When folding, pulling the movable plate 6 causes the insert rod 9 to retract into the support leg 5, allowing the reinforcing plate 7 to be folded. When the reinforcing plate 7 is folded, the insert rod 9 is located on both sides of the reinforcing plate 7, fixing the reinforcing plate 7 inside the support leg 5. Through the coordinated arrangement of the movable plate 6, the insert rod 9, and the insertion hole 11, the folded and unfolded reinforcing plate 7 can be fixed during use, thereby increasing the adaptability of the folding chair to the terrain and achieving the purpose of adapting the bottom of the support leg to complex terrain.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hinged folding chair, comprising a seat (1), wherein a backrest (2) is hinged to the upper part of the seat (1), characterized in that: The lower part of the seat (1) is fixedly connected to a self-locking hinge (4), and a support leg (5) is fixedly connected to one side of the self-locking hinge (4). A stop block (3) is fixedly connected to the lower part of the seat (1). One side of the stop block (3) is in contact with the outer side of the support leg (5). A sliding groove (14) is provided on the inner side of the support leg (5). A slider (13) is slidably connected inside the sliding groove (14). A support rod (8) is fixedly connected to one side of the slider (13). A reinforcing plate (7) is provided inside the support leg (5). A plug rod (9) is slidably connected to one side of the support leg (5). A plug hole (11) is provided on one side of the reinforcing plate (7). A plug rod (9) is inserted into the plug hole (11). A limiting rod (10) is fixedly connected to one side of the reinforcing plate (7). The limiting rod (10) slides in the limiting groove (12) opened in the support leg (5).

2. A hinged folding chair according to claim 1, characterized in that: When the support leg (5) is unfolded, its top is in contact with the seat (1). The lower part of the seat (1) is provided with a shrinkage groove (15). The support rod (8) and the slider (13) are slidably connected inside the shrinkage groove (15).

3. A hinged folding chair according to claim 1, characterized in that: The limiting groove (12) fits closely with the limiting rod (10). The cross-section of the limiting groove (12) and the limiting rod (10) is T-shaped. A socket (11) is provided on each side of the limiting rod (10).

4. A hinged folding chair according to claim 1, characterized in that: A movable plate (6) is fixedly connected to one side of the insertion rod (9), and one side of the movable plate (6) is in contact with the support leg (5). A support spring with a supporting function is provided between the insertion rod (9) and the support leg (5).

5. A hinged folding chair according to claim 1, characterized in that: The insertion hole (11) fits closely with the insertion rod (9). When the reinforcing plate (7) is unfolded, the insertion rod (9) is inserted into the insertion hole (11). When the reinforcing plate (7) is folded, the inner side of the insertion rod (9) clamps the reinforcing plate (7).

6. A hinged folding chair according to claim 2, characterized in that: The shape of the shrinkage groove (15) is consistent with the shape of the support rod (8) and the slider (13). The two sides of the shrinkage groove (15) are consistent with the shape of the slide groove (14) and are in corresponding positions. The support rod (8) is located in the middle of the support leg (5).

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