A folding chair

Abstract

The embodiment of the utility model provides a kind of folding chair, it is related to folding chair technical field.The folding chair includes chair frame body, front leg pipe, rear leg pipe and linkage mechanism, chair frame body is connected with front leg pipe rotation;The one end of linkage mechanism is connected with chair frame body rotation, the other end of linkage mechanism is connected with rear leg pipe sliding;Linkage mechanism rotates and can drive linkage mechanism from first position to second position;In the case where linkage mechanism is in first position, folding chair is in unfolded use state;In the case where linkage mechanism is in second position, folding chair is in folding state.By setting linkage mechanism, when user exerts a force, this force can be simultaneously transmitted to chair frame body and rear leg pipe by linkage mechanism, user does not need to operate different parts of chair respectively, one action can realize chair frame body and rear leg pipe folding or unfolding, reduces folding and unfolding step, ensures the smooth natural of folding and unfolding action, improves user experience.

Description

Technical Field

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

[0002] Folding chairs are widely used in outdoor activities and home use due to their ease of storage and transportation.

[0003] However, most existing folding chairs have cumbersome folding steps and poor user experience. Utility Model Content

[0004] This invention provides a folding chair that can be folded and unfolded in a coordinated manner, simplifying the folding and unfolding process and improving the user experience.

[0005] The embodiments of this utility model can be implemented as follows: An embodiment of this utility model provides a folding chair, including a chair frame, front leg tubes, and rear leg tubes. The folding chair also includes a linkage mechanism. The chair frame is rotatably connected to the front leg tube; one end of the linkage mechanism is rotatably connected to the chair frame, and the other end of the linkage mechanism is slidably connected to the rear leg tube. The rotation of the linkage mechanism can drive the linkage mechanism to move from the first position to the second position, or drive the linkage mechanism to move from the second position to the first position; When the linkage mechanism is in the first position, the folding chair is in the unfolded state; when the linkage mechanism is in the second position, the folding chair is in the folded state.

[0006] In an optional embodiment, the linkage mechanism includes a first support tube, a second support tube, and a sliding connector, wherein the second support tube is slidably engaged with the sliding connector; one end of the second support tube is rotatably connected to the chair frame, and the other end of the second support tube is hinged to the rear leg tube; one end of the first support tube is rotatably connected to the chair frame, and the other end of the first support tube is connected to the sliding connector. The rotation of the first support tube can cause the sliding connector to move along the second support tube from the first position to the second position, or from the second position to the first position. In an optional embodiment, the chair frame includes a seat tube rotatably connected to the front leg tube, one end of the second support tube being rotatably connected to the seat tube; and the first support tube being rotatably connected to the seat tube. In an optional embodiment, the chair frame further includes a backrest tube, which is rotatably connected to the seat tube. In an optional embodiment, the chair frame further includes armrests, one end of which is connected to the backrest tube, and the other end of which is hinged to the first support tube. In an optional embodiment, the front leg tube and the rear leg tube are intersected and rotatably connected. In an optional embodiment, the folding chair further includes a first connector, through which the rear leg tube is connected to the second support tube; the first connector is disposed between the intersection of the rear leg tube and the front leg tube and the end of the rear leg tube near the second support tube.

[0007] In an optional embodiment, the sliding connector is a sliding sleeve, which is slidably fitted onto the second support tube.

[0008] In an optional embodiment, the folding chair further includes a limiting structure disposed on the second support tube or the sliding connector, the limiting structure being used to limit the sliding range of the sliding connector.

[0009] In an optional embodiment, the sliding connector is provided with a boss to form the limiting structure.

[0010] The beneficial effects of the folding chair according to this utility model embodiment include, for example: This folding chair includes a chair frame, front legs, rear legs, and a linkage mechanism. The chair frame is rotatably connected to the front legs; one end of the linkage mechanism is rotatably connected to the chair frame, and the other end is slidably connected to the rear legs. Rotating the linkage mechanism moves it from a first position to a second position. When the linkage mechanism is in the first position, the folding chair is in its unfolded state; when the linkage mechanism is in the second position, the folding chair is in its folded state. By setting up the linkage mechanism, when the user applies a force, this force is simultaneously transmitted to the chair frame and the rear legs through the linkage mechanism. The user does not need to operate different parts of the chair separately; a single action can fold or unfold the chair frame and the rear legs, reducing the number of steps involved in folding and unfolding, ensuring smooth and natural folding and unfolding actions, and improving the user experience. Furthermore, this folding chair allows all the components to be more tightly packed together in the folded state, significantly reducing the overall volume when folded. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram from a first-view perspective of a folding chair provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of a folding chair provided in an embodiment of the present invention from a second perspective; Figure 3 This is a schematic diagram of a certain state during the folding process of the folding chair provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of a folding chair after it has been folded up, as provided in an embodiment of this utility model.

[0013] Icons: 1000 - Folding chair; 100 - Chair frame; 110 - Seat post; 120 - Backrest post; 130 - Armrest; 200 - Front leg post; 300 - Rear leg post; 400 - Linkage mechanism; 410 - First support post; 420 - Second support post; 430 - Sliding connector; 500 - First connector; 600 - Second connector. Detailed Implementation

[0014] 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 embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model.

[0018] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0019] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0020] Folding chairs are widely used in outdoor activities and home use due to their ease of storage and transportation. However, most existing folding chairs have cumbersome folding procedures, resulting in a poor user experience.

[0021] Based on this, please refer to Figures 1-4 The folding chair 1000 provided in the embodiments of this utility model can effectively improve the aforementioned technical problems. The folding chair 1000 can achieve coordinated folding and unfolding of the backrest tube 120 and the leg tube, simplifying the folding and unfolding steps, improving the user experience, and reducing the overall volume after folding.

[0022] Figure 1 This is a schematic diagram from a first-view perspective of the folding chair 1000 provided in an embodiment of the present utility model; Figure 2 This is a schematic diagram from a second perspective of the folding chair 1000 provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of a certain state during the folding process of the folding chair 1000 provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the folding chair 1000 provided in an embodiment of the present invention after being folded.

[0023] like Figure 1 and Figure 2As shown, the folding chair 1000 in this embodiment includes a chair frame 100, a front leg tube 200, a rear leg tube 300, and a linkage mechanism 400. The chair frame 100 is rotatably connected to the front leg tube 200. One end of the linkage mechanism 400 is rotatably connected to the chair frame 100, and the other end of the linkage mechanism 400 is slidably connected to the rear leg tube 300. Rotating the linkage mechanism 400 can move the linkage mechanism 400 from a first position to a second position, or move the linkage mechanism 400 from a second position to a first position. When the linkage mechanism 400 is in the first position, the folding chair 1000 is in an unfolded state. When the linkage mechanism 400 is in the second position, the folding chair 1000 is in a folded state. By setting up a linkage mechanism 400, when a user applies a force, this force is simultaneously transmitted to the chair frame 100 and the rear leg tube 300 through the linkage mechanism 400. The user does not need to operate different parts of the chair separately; a single action can fold or unfold the chair frame 100 and the rear leg tube 300 of the folding chair 1000. This reduces the number of folding and unfolding steps, ensuring smooth and natural folding and unfolding actions and improving the user experience. Furthermore, this folding chair 1000 allows all the rods to be more tightly packed together in the folded state, significantly reducing the overall volume after folding.

[0024] The aforementioned front leg tube 200 and rear leg tube 300 refer to the relative positions of the components in the assembly relationship, and do not represent their front-to-back orientation in physical space.

[0025] Please see Figures 1-4 In this embodiment, the linkage mechanism 400 includes a first support tube 410, a second support tube 420, and a sliding connector 430. The second support tube 420 and the sliding connector 430 are slidably engaged. One end of the second support tube 420 is rotatably connected to the chair frame 100, and the other end of the second support tube 420 is hinged to the rear leg tube 300. One end of the first support tube 410 is rotatably connected to the chair frame 100, and the other end of the first support tube 410 is connected to the sliding connector 430. Rotation of the first support tube 410 can drive the sliding connector 430 to move along the second support tube 420 from a first position to a second position, or from the second position to the first position. Of course, the linkage mechanism 400 may also include only the second support tube 420 and the sliding connector 430, or the linkage mechanism 400 may be designed in other structural forms, which are not limited here.

[0026] Specifically, in this embodiment, the chair frame 100 includes a seat tube 110, which is rotatably connected to the front leg tube 200. One end of the second support tube 420 is rotatably connected to the seat tube 110. A first support tube 410 is rotatably connected to the seat tube 110. Applying a force to the seat tube 110 can rotate the first support tube 410, thereby causing the sliding connector 430 to slide on the second support tube 420, moving from a first position to a second position, so that the seat tube 110 and the rear leg tube 300 can be folded together. Alternatively, applying a force to the seat tube 110 can rotate the first support tube 410, thereby causing the sliding connector 430 to slide on the second support tube 420, moving from a second position to a first position, so that the seat tube 110 and the rear leg tube 300 can be unfolded together.

[0027] To provide back support and improve the comfort of the folding chair 1000, the chair frame 100 in this embodiment also includes a backrest tube 120, which is rotatably connected to the seat tube 110. To achieve coordinated folding and unfolding of the chair frame 100 and the rear leg tube 300, one end of the first support tube 410 in this embodiment can be connected to the backrest tube 120, the first support tube 410 is rotatably connected to the seat tube 110, and the other end of the first support tube 410 is connected to the sliding connector 430. When folding, applying a force to the backrest tube 120 or the seat tube 110 simultaneously folds or unfolds the backrest tube 120, the seat tube 110, and the rear leg tube 300, reducing the number of folding and unfolding steps and improving the user experience.

[0028] Please continue reading. Figures 1-4To support the arms and alleviate fatigue, the chair frame 100 in this embodiment also includes armrests 130. One end of the armrest 130 is connected to the backrest tube 120, and the other end is hinged to the first support tube 410. The user's arms can rest naturally on the armrests 130, reducing muscle pressure on the shoulders, neck, and back. This support greatly improves comfort and reduces fatigue when sitting for long periods of time chatting, eating, or resting. In addition, the armrests 130 form a protective frame on both sides of the body, increasing the user's psychological sense of security. When the body moves laterally or tilts, the arms can instinctively hold onto the armrests 130, preventing loss of control and enhancing the lateral stability of the chair to some extent. Furthermore, by hinged to the first support tube 410 via the armrest 130, a force can be applied to the backrest tube 120 in the direction of the armrest 130 (the folding direction) during folding, causing it to rotate relative to the seat tube 110. Simultaneously, because the armrest 130 is connected to the backrest tube 120, the armrest 130 can drive the first support tube 410 to rotate, thereby causing the sliding connector 430 to slide from a first position to a second position on the second support tube 420. This causes the first support tube 410 to rotate closer to the seat tube 110, achieving rapid overall folding. The unfolding process is the reverse of the folding process. During folding or unfolding, the user only needs to apply a major force to any component, and this action will be automatically transmitted through the linkage mechanism 400, driving other components to move synchronously. Of course, applying a force in the folding or unfolding direction to the seat tube 110 or the armrest 130 can also achieve the same effect, which will not be elaborated here.

[0029] Furthermore, the folding chair 1000 in this embodiment also includes a limiting structure, which is disposed on the second support tube 420 or the sliding connector 430. The limiting structure is used to limit the sliding range of the sliding connector 430 to prevent the sliding connector 430 from sliding excessively upward or downward. Specifically, the sliding connector 430 in this embodiment is provided with a boss to form the limiting structure. In this embodiment, a boss is provided on the upper end face of the slide sleeve to prevent the sliding connector 430 from sliding excessively upward. Of course, a boss can also be provided on the upper end face and / or lower end face of the slide sleeve to prevent the sliding connector 430 from sliding excessively upward or downward. An upper limit block and / or a lower limit block can also be provided on the second support tube 420, which is not limited here. The limiting structure can be a boss or designed with other shapes, which is not limited here.

[0030] To improve the structural strength and stability of the chair when unfolded, and to allow for the simultaneous folding of the front leg tube 200 and the rear leg tube 300, please refer to [link / reference needed]. Figures 1-4In this embodiment, the front leg tube 200 and the rear leg tube 300 intersect and are rotatably connected. The "X"-shaped structure formed by the intersection of the front leg tube 200 and the rear leg tube 300 constitutes a variation of the extremely stable triangular support principle in mechanical terms. When the folding chair 1000 bears a vertical load, the force is converted into pressure along the leg tube direction and effectively transmitted and dispersed through the intersecting hinge points. This structure can withstand forces and moments from all directions, significantly improving the stiffness and stability of the chair and ensuring safety and comfort during use. The intersecting hinge design allows the front leg tube 200 and the rear leg tube 300 to almost completely overlap in the folded state, minimizing thickness. At the same time, since the movement trajectory is constrained within the same plane, the folded leg tubes form a neat, flat bundle, which not only minimizes the storage volume but also makes packaging and stacking more convenient. Since the first support tube 410 is slidably connected to the front leg tube 200 or the rear leg tube 300, a force in the folding direction is applied to the backrest tube 120 during folding, causing it to rotate relative to the seat tube 110. Simultaneously, because the armrest 130 is connected to the backrest tube 120, the first support tube 410 can slide relative to the second support tube 420 via the sliding connector 430. This action reduces the distance between the second support tube 420 and the rear leg tube 300, thereby causing the front leg tube 200 and the rear leg tube 300 to rotate and fold together, achieving rapid overall folding.

[0031] Specifically, in this embodiment, the front leg tube 200 and the rear leg tube 300 intersect and are rotatably connected at their midpoints. Because the two leg tubes are hinged at the center point, they form a linkage mechanism that is completely symmetrical in motion. When folding or unfolding, the movement of the front leg tube 200 and the rear leg tube 300 is strictly synchronized and mirror-symmetrical. The user only needs to apply a small force to drive the entire frame to move in a coordinated manner, making the operation relatively effortless and smooth, while ensuring the symmetry of the folding chair 1000.

[0032] To make the folding chair 1000 more compact when folded, the first support tube 410 in this embodiment is hinged to the sliding connector 430. During the folding process, the hinge allows the first support tube 410 to rotate to its most compact state, almost parallel to the leg tubes, while sliding. This feature allows all the rods to fit together as tightly as possible after folding, thereby further reducing the overall folded volume and optimizing packaging and storage space. In addition, the hinged connection allows the first support tube 410 to rotate freely around the hinge point while maintaining its connection with the sliding connector 430. This rotational freedom allows the first support tube 410 to adaptively adjust its relative angle with the leg tubes and seat tubes 110 during the complex movements of unfolding and folding the chair. This effectively avoids structural interference (jamming) or excessive stress inside the components caused by mismatched movement trajectories, ensuring the smoothness and naturalness of the entire folding and unfolding action.

[0033] Specifically, the folding chair 1000 in this embodiment also includes a first connector 500, through which the rear leg tube 300 is connected to the second support tube 420. The first connector 500 is located between the intersection of the rear leg tube 300 and the front leg tube 200 and the end of the rear leg tube 300 closest to the second support tube 420. That is, the second support tube 420, the seat tube 110, and the rear leg tube 300 together form a stable triangular frame. The triangle provides stability, effectively distributing and transferring the load borne by the seat tube 110 to the rear leg tube 300 and the ground. This greatly enhances the overall rigidity and load-bearing capacity of the folding chair 1000 in its unfolded state, effectively preventing swaying and deformation during use, and especially improving the structural durability for long-term use.

[0034] To simplify the connection, in this embodiment, the first connector 500 is sleeved on the rear leg tube 300 and fixedly connected to the rear leg tube 300 by at least one fastener. The fastener can be a bolt, screw, pin, etc., and is not limited thereto. Of course, the first connector 500 can also be connected to the rear leg tube 300 by welding or threaded connection, and is not limited thereto.

[0035] Of course, the other end of the first support tube 410 can also be directly slidably connected to the front leg tube 200 or the rear leg tube 300, which is not limited here.

[0036] Please continue reading. Figures 1-3In this embodiment, the folding chair 1000 includes a second connector 600, which is fixedly connected to the seat tube 110. The seat tube 110 is rotatably connected to the front leg tube 200 and the backrest tube 120 via the second connector 600. The second connector 600 acts as an integrated structural hub, consolidating functions that would otherwise require multiple independent connectors. This modular design greatly simplifies the structural complexity of the seat tube 110 head, resulting in a more compact and streamlined overall layout. Simultaneously, all rotating joints are concentrated on a single rigid component, ensuring the accuracy and consistency of the relative positions of the moving parts, thus preventing motion interference caused by accumulated assembly errors. Furthermore, by carefully designing the relative positions of the hinge points on the second connector 600, the movement trajectories of the front leg tube 200 and the backrest tube 120 during the folding process can be optimally planned, ensuring that they can come together in the most compact and reasonable manner when folded, thereby minimizing the folded volume.

[0037] Optionally, please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the sliding connector 430 is a sliding sleeve, which is slidably fitted onto the second support tube 420. The cooperation between the sliding sleeve and the second support tube 420 provides a large contact area, resulting in better guidance and smoother movement during sliding. Furthermore, this full-circumferential wrapping structure can better withstand forces from different directions, enhancing the structural rigidity and overall stability of the connection point. In addition, the sliding sleeve has a simple structure, low manufacturing cost, and is easy to assemble and maintain.

[0038] Of course, the sliding connector 430 can also be a slider or a pulley. The groove is formed on the wall of the second support tube 420, the front leg tube 200, or the rear leg tube 300, or on an independent groove component fixed to the leg tube. The slider or pulley slides in conjunction with the groove, which is not limited here.

[0039] Optionally, the folding chair 1000 in this embodiment also includes a locking mechanism, which is disposed at the sliding connection position. In this embodiment, the locking mechanism is disposed at the sliding connector 430, and is used to lock the relative position between the first support tube 410 and the front leg tube 200 or the rear leg tube 300 when the folding chair 1000 is unfolded. This locking mechanism can effectively prevent the sliding connector 430 from moving accidentally due to unexpected external forces or changes in the user's center of gravity during use, thereby improving the safety and reliability of use.

[0040] Specifically, the locking mechanism in this embodiment includes an elastic positioning pin disposed on the slider or sleeve of the sliding connector 430, and at least one positioning hole disposed on the leg tube; when the folding chair 1000 is unfolded to the use state, the elastic positioning pin is engaged with the positioning hole under the action of elastic force to achieve locking. Alternatively, the locking mechanism includes a threaded hole penetrating the slider or sleeve of the sliding connector 430, and a fastening bolt that mates with the threaded hole; tightening the fastening bolt so that its end abuts against the leg tube, locking is achieved by friction. Alternatively, the locking mechanism is an eccentric cam quick-lock mechanism, in which the cam is driven to press against the contact surface by operating the handle to achieve locking or unlocking. The specific structure of the locking mechanism is not limited here, and is determined according to the actual use and installation.

[0041] The working principle of the folding chair 1000 provided in this embodiment is as follows: When folding, a force can be applied to the backrest tube 120 in the direction of the armrest 130, i.e. the folding direction, to make it rotate relative to the seat tube 110. At the same time, since the armrest 130 is connected to the backrest tube 120, the armrest 130 can drive the first support tube 410 to rotate, thereby driving the sliding connector 430 to move from the first position to the second position on the second support tube 420, i.e., to slide in the direction closer to the first connector 500, thereby causing the second support tube 420 to rotate in the direction closer to the seat tube 110, thus achieving rapid folding of the whole.

[0042] Conversely, when unfolded, a force in the unfolding direction is applied to any of the components, such as the backrest tube 120, the front leg tube 200, or the rear leg tube 300. The sliding connector 430 moves from the second position to the first position on the second support tube 420, that is, slides away from the first connector 500. Other components move in the opposite direction when folded to drive the whole to return to the fully unfolded state, thereby achieving rapid overall unfolding.

[0043] In summary, the folding chair 1000 includes a chair frame 100, a front leg tube 200, a rear leg tube 300, and a linkage mechanism 400. The chair frame 100 is rotatably connected to the front leg tube 200. One end of the linkage mechanism 400 is rotatably connected to the chair frame 100, and the other end of the linkage mechanism 400 is slidably connected to the rear leg tube 300. Rotating the linkage mechanism 400 can move it from a first position to a second position. When the linkage mechanism 400 is in the first position, the folding chair 1000 is in an unfolded state. When the linkage mechanism 400 is in the second position, the folding chair 1000 is in a folded state. By setting up a linkage mechanism 400, when a user applies a force, this force is simultaneously transmitted to the chair frame 100 and the rear leg tube 300 through the linkage mechanism 400. The user does not need to operate different parts of the chair separately; a single action can fold or unfold the chair frame 100 and the rear leg tube 300 of the folding chair 1000. This reduces the number of folding and unfolding steps, ensuring smooth and natural folding and unfolding actions and improving the user experience. Furthermore, this folding chair 1000 allows all the rods to be more tightly packed together in the folded state, significantly reducing the overall volume after folding.

[0044] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A folding chair, comprising a chair frame (100), front leg tubes (200), and rear leg tubes (300), characterized in that, The folding chair (1000) also includes: a linkage mechanism (400); The chair frame (100) is rotatably connected to the front leg tube (200); one end of the linkage mechanism (400) is rotatably connected to the chair frame (100), and the other end of the linkage mechanism (400) is slidably connected to the rear leg tube (300); The rotation of the linkage mechanism (400) can drive the linkage mechanism (400) to move from the first position to the second position, or drive the linkage mechanism (400) to move from the second position to the first position; When the linkage mechanism (400) is in the first position, the folding chair (1000) is in the unfolded state; when the linkage mechanism (400) is in the second position, the folding chair (1000) is in the folded state. The linkage mechanism (400) includes a first support tube (410), a second support tube (420), and a sliding connector (430). The second support tube (420) is slidably engaged with the sliding connector (430). One end of the second support tube (420) is rotatably connected to the chair frame (100), and the other end of the second support tube (420) is hinged to the rear leg tube (300). One end of the first support tube (410) is rotatably connected to the chair frame (100), and the other end of the first support tube (410) is connected to the sliding connector (430). When the first support tube (410) rotates, it can drive the sliding connector (430) to move along the second support tube (420) from the first position to the second position, or from the second position to the first position.

2. The folding chair according to claim 1, characterized in that, The chair frame (100) includes a seat tube (110), which is rotatably connected to the front leg tube (200), and one end of the second support tube (420) is rotatably connected to the seat tube (110); the first support tube (410) is rotatably connected to the seat tube (110).

3. The folding chair according to claim 2, characterized in that, The chair frame (100) also includes a backrest tube (120), which is rotatably connected to the seat tube (110).

4. The folding chair according to claim 3, characterized in that, The chair frame (100) also includes an armrest (130), one end of which is connected to the backrest tube (120), and the other end of which is hinged to the first support tube (410).

5. The folding chair according to claim 1, characterized in that, The front leg tube (200) and the rear leg tube (300) intersect and are rotatably connected.

6. The folding chair according to claim 5, characterized in that, The folding chair (1000) also includes a first connector (500), the rear leg tube (300) is connected to the second support tube (420) through the first connector (500); the first connector (500) is disposed between the cross connection position of the rear leg tube (300) and the front leg tube (200) and the end of the rear leg tube (300) near the second support tube (420).

7. The folding chair according to claim 1, characterized in that, The sliding connector (430) is a sliding sleeve, and the sliding connector (430) is slidably sleeved on the second support tube (420).

8. The folding chair according to claim 1, characterized in that, The folding chair (1000) also includes a limiting structure, which is disposed on the second support tube (420) or the sliding connector (430), and the limiting structure is used to limit the sliding range of the sliding connector (430).

9. The folding chair according to claim 8, characterized in that, The sliding connector (430) is provided with a boss to form the limiting structure.

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