Limiting and stabilizing type folding chair support

Abstract

The utility model belongs to the technical field of folding chair, concretely relates to stable type folding chair support of limiting, including cushion frame, the bottom of cushion frame is connected with front chair foot and rear chair foot through first limiting joint respectively, and first limiting joint includes limiting sleeve groove and connecting rod, and connecting rod pivot connects in limiting sleeve groove, and the top rear side of cushion frame is rotatably connected with backrest support, the utility model discloses through the universal design and simple docking type assembly mechanism of limiting joint, effectively simplifies folding chair support structure, reduces the structure volume, improves structural stability, and limiting joint can adapt to different chair size, and the product quality and product benefit are improved significantly.

Description

Technical Field

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

[0002] Folding chairs are lightweight, convenient, and foldable chairs widely used in daily life. They are not only easy to move but also save space, making them particularly suitable for outdoor use. Therefore, with the continuous improvement of people's living standards and the booming development of outdoor activities such as camping and fishing, people's quality requirements for folding chair products are also increasing.

[0003] Currently, the typical structure of folding chairs on the market is shown in patent document CN201720863534.6, entitled "Multifunctional Folding Chair". It includes a backrest frame composed of a crossbar and side bars arranged at both ends of the crossbar and extending in the same direction, a seat frame, and two legs. The seat frame and the backrest frame are connected by a backrest folding mechanism, allowing the backrest frame to be opened or folded together relative to the seat frame. The seat frame and the two legs are connected by a leg folding mechanism, allowing the two legs to be opened relative to the seat frame to support it or folded together.

[0004] However, the folding legs and backrest mechanism of the aforementioned folding chair are prone to deformation under stress, and the positioning stability cannot be guaranteed. In addition, the structure is relatively complex, leaving considerable room for improvement. Utility Model Content

[0005] Because the structure of ordinary folding chairs on the market is prone to deformation under stress, the positioning stability cannot be guaranteed, and the structure is relatively complex, we provide a folding chair support with limited stability.

[0006] This utility model is achieved through the following technical solution: A stabilizing folding chair support includes a seat frame. The bottom of the seat frame is connected to a front chair leg and a rear chair leg via a first limiting joint. The first limiting joint includes a limiting groove and a connecting rod. The connecting rod is pivotally connected to the limiting groove. A backrest support is rotatably connected to the top rear side of the seat frame.

[0007] Furthermore, the first limiting joint includes a square base, a limiting sleeve groove, and a connecting rod connected in sequence. The top of the square base is connected to the bottom of the seat cushion frame, and the tops of the front and rear chair legs are both connected to the connecting rod.

[0008] Furthermore, a reinforcing rod is provided in the middle of the seat frame, and the square base is connected to the bottom of the reinforcing rod by bolts.

[0009] Furthermore, both the front and rear chair legs are U-shaped, and both the top sides of the front and rear chair legs are provided with mating sleeves, with connecting rods sleeved on the inner side of the mating sleeves.

[0010] Furthermore, the width of the front seat leg is greater than that of the rear seat leg, and the front and rear seat legs are mounted on the same central axis.

[0011] Furthermore, the bottom of the backrest support is connected to a second limiting joint, which includes a limiting sleeve groove and a connecting rod. The connecting rod is pivotally connected to the limiting sleeve groove, and a joint sleeve is provided on the top rear side of the seat cushion frame. The connecting rod of the second limiting joint is sleeved in the joint sleeve.

[0012] Furthermore, the backrest bracket is inverted U-shaped, and the second limiting joint includes a bracket sleeve, a limiting sleeve groove and a connecting rod connected in sequence. The bracket sleeve opens upward, and both ends of the bottom of the backrest bracket are connected to the bracket sleeve.

[0013] Furthermore, the side of the bracket sleeve is provided with positioning screw holes, in which positioning bolts for threaded connection between the bracket sleeve and the backrest bracket are installed.

[0014] The advantages of this utility model are: 1. The joint components use the cooperation of the limiting sleeve groove and the connecting rod to position the opening angle, preventing excessive rotation. The structure is simple and highly stable.

[0015] 2. All joints can be quickly installed and connected, and many joint components are identical, which facilitates assembly and maintenance.

[0016] 3. The joint components can be quickly connected via the sockets on the bracket, making it easy to adapt to brackets of different sizes.

[0017] 4. It has fewer parts, a smaller folding volume, and a compact structure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 Structural diagram of a folding chair support with limiting and stabilizing function; Figure 2 A schematic diagram of the structure for installing a seat cushion on a stabilizing folding chair frame; Figure 3 A folding structure diagram for a stabilizing folding chair support; Figure 4 Here is a detailed structural diagram of the first limiting joint; Figure 5 This is a detailed structural diagram of the second limiting joint.

[0020] Attached image labels: 1. First limiting joint; 101. Square base; 2. Second limiting joint; 201. Bracket sleeve; 202. Positioning screw hole; 3. Seat cushion frame; 301. Reinforcing rod; 401. Front seat leg; 402. Rear seat leg; 5. Backrest bracket; 6. Limiting sleeve groove; 7. Connecting rod; 8. Docking sleeve; 9. Joint sleeve; 10. Positioning bolt. Detailed Implementation

[0021] Because the structure of ordinary folding chairs on the market is prone to deformation under stress, the positioning stability cannot be guaranteed, and the structure is relatively complex, we provide a folding chair support with limited stability.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] It should be noted that the terms such as "inner", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as part of the scope of implementation of this utility model, as stated above.

[0024] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

[0025] like Figure 1-5 As shown, this embodiment provides a stabilizing folding chair support, including a seat frame 3. The bottom of the seat frame 3 is connected to a front chair leg 401 and a rear chair leg 402 via a first limiting joint 1. The first limiting joint 1 includes a limiting groove 6 and a connecting rod 7. The connecting rod 7 is rotatably connected to the limiting groove 6. A backrest support 5 is rotatably connected to the rear top of the seat frame 3.

[0026] In this embodiment, the openings of the limiting sleeve grooves 6 all face inward, and the angle between the bottom of the seat cushion frame 3 and one end of the opening of the limiting sleeve groove 6 is an obtuse angle. Therefore, the front seat leg 401 and the rear seat leg 402 can retract inward and below the seat cushion frame 3 when folded. When the front seat leg 401 and the rear seat leg 402 are unfolded, they form a V-shape, providing stable support for the seat cushion frame 3. In addition, when unfolded, the connecting rod 7 is parallel and fitted into the limiting sleeve groove 6, and the limiting sleeve groove 6 provides limiting support for the connecting rod 7. Therefore, by setting the installation orientation of the limiting sleeve groove 6, the unfolding angle of the limiting joint can be easily set.

[0027] The first limiting joint 1 includes a square base 101, a limiting sleeve groove 6, and a connecting rod 7 connected in sequence. The top of the square base 101 is connected to the bottom of the seat cushion frame 3, and the tops of the front seat leg 401 and the rear seat leg 402 are both connected to the connecting rod 7. The design of the square base 101 can distribute the stress points and improve the support stability of the first limiting joint 1.

[0028] A reinforcing rod 301 is provided in the middle of the seat cushion frame 3, and the square base 101 is connected to the bottom of the reinforcing rod 301 by bolts. The design of the reinforcing rod 301 can improve the structural strength of the seat cushion frame 3, thereby further improving the support stability of the chair legs.

[0029] Both the front chair leg 401 and the rear chair leg 402 are U-shaped. Each of the top sides of the front chair leg 401 and the rear chair leg 402 has a mating sleeve 8, with a connecting rod 7 fitted inside the mating sleeve 8. The U-shaped front chair leg 401 and the rear chair leg 402 can be made by bending tubing, which is convenient for production. The hollow tubing generally comes with its own mating sleeve 8, allowing for quick connection between the chair leg and the joint. To ensure a stable connection, the width of the connecting rod 7 can be set according to the inner diameter of the tubing, allowing the connecting rod 7 to fit tightly with the mating sleeve 8. Furthermore, filling the mating sleeve 8 with silicone sealant or screwing screws into the side of the mating sleeve 8 can further enhance the stability of the connection between the chair leg and the joint.

[0030] The width of the front chair leg 401 is greater than that of the rear chair leg 402, and the front chair leg 401 and the rear chair leg 402 are mounted on the same central axis. In this embodiment, since the width of the front chair leg 401 is greater than that of the rear chair leg 402, the rear chair leg 402 is completely hidden inside the front chair leg 401 in the folded state, resulting in a compact structure and reducing the thickness of the chair leg when folded.

[0031] The bottom of the backrest support 5 is connected to a second limiting joint 2. The second limiting joint 2 includes a limiting sleeve groove 6 and a connecting rod 7. The connecting rod 7 is pivotally connected to the limiting sleeve groove 6. A joint sleeve 9 is provided on the top rear side of the seat cushion frame 3, and the connecting rod 7 of the second limiting joint 2 is sleeved in the joint sleeve 9. The backrest support 5 is inverted U-shaped. The second limiting joint 2 includes a support sleeve 201, a limiting sleeve groove 6, and a connecting rod 7 connected in sequence. The support sleeve 201 opens upward, and both ends of the bottom of the backrest support 5 are connected to the support sleeve 201. The backrest support 5 adopts a U-shaped tubular structure consistent with the chair legs, which is convenient for production and assembly. In addition, the design of the support sleeve 201 and the bottom sides of the backrest support 5 docking together facilitates the second limiting joint 2 to adapt to backrest supports 5 of different shapes and sizes, providing high flexibility.

[0032] The side of the bracket sleeve 201 is provided with a positioning screw hole 202, in which a positioning bolt 10, threadedly connecting the bracket sleeve 201 and the backrest bracket 5, is installed. To improve the connection stability between the second limiting joint 2 and the backrest bracket 5, the second limiting joint 2 and the backrest bracket 5 are connected as a single unit using screws. In this embodiment, to ensure that the backrest bracket 5 does not wobble under force, at least two positioning bolts 10 are threaded onto the side of the bracket sleeve 201 for positioning.

[0033] The above description is a further detailed explanation of the present utility model in conjunction with specific preferred embodiments. It should not be assumed that the specific implementation of the present utility model is limited to these descriptions. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present utility model.

Claims

1. A stabilizing and limiting folding chair frame, including a seat cushion frame, characterized in that, The bottom of the seat cushion frame is connected to the front seat leg and the rear seat leg respectively through the first limiting joint. The first limiting joint includes a limiting sleeve groove and a connecting rod. The connecting rod is pivotally connected to the limiting sleeve groove. The backrest bracket is rotatably connected to the top rear side of the seat cushion frame.

2. The limiting and stabilizing folding chair bracket according to claim 1, characterized in that, The first limiting joint includes a square base, a limiting sleeve groove, and a connecting rod connected in sequence. The top of the square base is connected to the bottom of the seat cushion frame, and the tops of the front and rear chair legs are connected to the connecting rod.

3. The limiting and stabilizing folding chair bracket according to claim 2, characterized in that, A reinforcing rod is provided in the middle of the seat cushion frame, and the square base is connected to the bottom of the reinforcing rod by bolts.

4. The limiting and stabilizing folding chair bracket according to claim 1, characterized in that, Both the front and rear chair legs are U-shaped, and both sides of the top of the front and rear chair legs are provided with mating sleeves, with connecting rods sleeved on the inner side of the mating sleeves.

5. The limiting and stabilizing folding chair bracket according to claim 4, characterized in that, The width of the front chair leg is greater than that of the rear chair leg, and the front and rear chair legs are mounted on the same central axis.

6. The limiting and stabilizing folding chair bracket according to claim 1, characterized in that, The bottom of the backrest support is connected to a second limiting joint, which includes a limiting sleeve groove and a connecting rod. The connecting rod is pivotally connected to the limiting sleeve groove. A joint sleeve is provided on the top rear side of the seat frame, and the connecting rod of the second limiting joint is sleeved in the joint sleeve.

7. The limiting and stabilizing folding chair bracket according to claim 6, characterized in that, The backrest bracket is inverted U-shaped. The second limiting joint includes a bracket sleeve, a limiting sleeve groove and a connecting rod connected in sequence. The bracket sleeve opens upward, and both ends of the bottom of the backrest bracket are connected to the bracket sleeve.

8. The limiting and stabilizing folding chair bracket according to claim 7, characterized in that, The side of the bracket sleeve is provided with a positioning screw hole, and a positioning bolt for threaded connection between the bracket sleeve and the backrest bracket is installed in the positioning screw hole.

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