Folding chair

Abstract

The utility model provides a folding chair which comprises a chair back, a chair plate and supporting legs, the chair plate is rotatably connected with the chair back, and the chair plate is fixedly connected with the supporting legs; the chair plate comprises a first side rod extending towards the chair back; the end, facing the chair back, of the first side rod is provided with a rotation stopping piece, the rotation stopping piece is provided with a protruding part extending towards the chair back, the protruding part is located on the rotation path of the chair back, and the protruding part is configured to make contact with the chair back in the folding chair opening process and make contact with the chair back when the folding chair is unfolded. The chair back is limited to rotate in the direction far away from the upper surface of the chair plate.

Description

Technical Field

[0001] The present application relates to the field of office supplies, and in particular to a folding chair. Background Art

[0002] In existing folding chairs, the backrest and legs are integrated, and the seat plate and backrest are hingedly connected. After folding, the folding chair becomes a thin, almost plate-like structure. In contrast, in existing office chairs, the legs are fixedly connected to the base plate. Therefore, the structure of existing folding chairs is not suitable for office chairs. Utility Model Content

[0003] The purpose of this application is to provide a folding chair that can be used as an office chair.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a folding chair comprising a backrest, a seat panel and legs, wherein the seat panel is rotatably connected to the backrest and fixedly connected to the legs; the seat panel comprises a first side rod extending toward the backrest; a stopper is provided at the end of the first side rod facing the backrest, the stopper having a protrusion extending toward the backrest, the protrusion being located on the rotation path of the backrest, and the protrusion being configured to: contact the backrest during the opening process of the folding chair to limit the rotation of the backrest in a direction away from the upper surface of the seat panel.

[0006] In the above technical solution, the seat plate is fixedly connected to the legs. Therefore, the folding chair using the above technical solution can be suitable for office chairs. Because the seat plate is rotatably connected to the chair back, the chair back can be folded by rotating it toward the upper surface of the seat plate. In the folded state, the folding chair can be unfolded by rotating the folded chair back away from the upper surface of the seat plate. According to the arrangement of the anti-rotation member used in the above technical solution, the chair back can stop rotating when it contacts the anti-rotation member. The anti-rotation member can also provide support for the chair back when the user leans on it.

[0007] In some optional embodiments, the anti-rotation member includes a connecting plate and a limiting plate, the chair back includes a back plate and a connecting member arranged on the back plate, the connecting plate and the connecting member are rotatably connected via a rotating shaft, one end of the limiting plate is arranged on the lower side of the connecting plate and below the rotating shaft, and the other end of the limiting plate has the protrusion.

[0008] In the above technical solution, the seat back can rotate relative to the anti-rotation member. In the folded state, the seat back is located on the upward side of the seat plate. Therefore, it is easy to understand that the seat back is located above the rotation axis. The limit plate is connected to the lower side of the rotation axis. In other words, the seat plate and the seat back are located on both sides of the rotation axis. Therefore, the anti-rotation member can effectively achieve the effect of limiting the rotation of the seat plate.

[0009] In some optional embodiments, the first side rod is a hollow structure and has an opening at one end facing the chair back, the connecting plate is located inside the first side rod and is connected to the two opposite side walls inside the first side rod through the rotating shaft, and the end of the limiting plate having the protrusion is located outside the first side rod.

[0010] In the above technical solution, the first side rod is a hollow structure, so that the weight of the first side rod can be lighter. The connecting plate of the anti-rotation member is located inside the first side rod, which can reduce the space occupied by the anti-rotation member after being connected to the first side rod.

[0011] In some optional embodiments, a shell-like structure is further provided at one end of the first side rod facing the chair back, and the shell-like structure is a plastic structural part and is sleeved on the outside of the end of the first side rod; the shell-like structure is provided with a strip-shaped through hole so that the protrusion extends from the inside of the first side rod.

[0012] In the above technical solution, by providing a shell-like structure at the end of the first side rod facing the chair back, it is possible to reduce the entry of external impurities into the first side rod. In addition, the shell-like structure is a plastic structural part, which is easy to mold.

[0013] In some optional embodiments, the connecting member includes a first side plate and a second side plate relative to each other, the first side rod is located between the first side plate and the second side plate, and the first side plate, the second side plate and the first side rod are all rotatably connected to the rotating shaft.

[0014] In the above technical solution, the connecting part includes a first side panel and a second side panel, the first side rod is located between the first side panel and the second side panel, and the first side rod is rotatably connected to the first side panel and the second side panel through a rotating shaft, so that the forces on both sides of the first side rod are more balanced, making it easier to rotate between the chair panel and the chair back.

[0015] In some optional embodiments, a connecting plate is connected to each side of the limiting plate, and one connecting plate is rotatably connected to the first side plate at one end of the rotating shaft, and the other connecting plate is rotatably connected to the second side plate at the other end of the rotating shaft.

[0016] In the above technical solution, both sides of the limit plate are connected to the connecting parts through the connecting plates. When the protrusion abuts against the chair back, the connecting plates on both sides are subjected to force, making the force between the connecting part and the anti-rotation part more balanced, and the connection position between the connecting part and the anti-rotation part is not easy to deform.

[0017] In some optional embodiments, a vertically continuous area is formed between the first side panel and the second side panel, so that the protrusion can be rotated in or out between the first side panel and the second side panel.

[0018] In some optional embodiments, the edge of the protrusion away from the first side rod is used to contact the chair back during the rotation process to limit the rotation of the chair back.

[0019] In the above technical solution, the edge of the protrusion away from the first side rod directly contacts the chair back, thereby limiting the rotation of the chair back, so that the protrusion can have a relatively simple structure.

[0020] In some optional embodiments, the limiting plate is a flat plate-shaped structural member.

[0021] In the above technical solution, the limiting plate is a flat plate-shaped structural member, which makes the structure of the anti-rotation member relatively simple.

[0022] In some optional embodiments, the upper surface of the protrusion is used to contact the chair back during the rotation process to limit the rotation of the chair back.

[0023] In the above technical solution, the rotation of the chair back is limited by the upper surface of the protrusion contacting the chair back, so that the contact area between the protrusion and the chair back is large, thereby being able to better limit the rotation of the chair back.

[0024] In some optional embodiments, the limiting plate includes a first section and a second section, the connecting plate is connected to the first section, and the protrusion is located in the second section; the upper surface of the first section is higher than the upper surface of the protrusion.

[0025] In the above technical solution, the upper surface of the second section is lower than that of the first section, meaning that the first section is closer to the rotation axis and the second section is farther away from the rotation axis. Therefore, the protrusion on the second section effectively limits the rotation of the chair back. Furthermore, the closer proximity of the first section to the rotation axis allows the size of the anti-rotation member to be smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of a folding chair provided in an embodiment of the present application changing from a folded state to an unfolded state (the dotted line in the figure indicates the position of the chair back in the folded state);

[0028] Figure 2 A schematic diagram of a folding chair provided in an embodiment of the present application in an unfolded state;

[0029] Figure 3 A schematic diagram of a chair board provided in an embodiment of the present application;

[0030] Figure 4 This is a schematic diagram of the structure and installation of the anti-rotation member in the first embodiment of the present application;

[0031] Figure 5 A schematic diagram of the connection between the chair plate and the chair back provided in the first embodiment of the present application;

[0032] Figure 6 A front view of the anti-rotation member provided in the first embodiment of the present application;

[0033] Figure 7 A top view of the anti-rotation member provided in the first embodiment of the present application;

[0034] Figure 8 This is a schematic diagram of the structure and installation of the anti-rotation member in the second embodiment of the present application;

[0035] Figure 9 This is an external schematic diagram of the connection between the seat plate and the seat back in the second embodiment of the present application;

[0036] Figure 10 This is an internal schematic diagram of the connection between the seat panel and the seat back in the second embodiment of the present application.

[0037] Icons: 100-seat board; 110-first side rod; 112-shell-like structure; 120-second side rod; 130-crossbeam; 140-strip structure; 151-first reinforcement; 152-second reinforcement; 200-chair back; 210-connecting part; 211-first side panel; 212-second side panel; 213-mounting plate; 214-rotating shaft; 220-back panel; 300-stop member; 310-protrusion; 320-connecting plate; 330-limiting plate; 340-first section; 350-second section; 400-support foot. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0043] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0044] The present application provides a folding chair, such as Figure 1 and Figure 2 As shown, the chair comprises a backrest 200, a seat panel 100, and legs 400. The seat panel 100 is rotatably connected to the backrest 200, and the seat panel 100 is fixedly connected to the legs 400. The legs 400 contact the ground and provide support. Folding and unfolding are achieved through the relative rotation of the seat panel 100 and the backrest 200. The folding process involves rotating the backrest 200 toward the upper surface of the seat panel 100; the unfolding process involves rotating the backrest 200, which is substantially parallel to the upper surface of the seat panel 100, away from the upper surface of the backrest 200.

[0045] like Figure 3 As shown, the chair plate 100 includes a first side bar 110. Figure 4 、 Figure 5 、 Figures 8 to 10 As shown, a stopper 300 is provided at the end of the first side bar 110 facing the chair back 200. The stopper 300 has a protrusion 310 extending toward the chair back 200. The protrusion 310 is located in the rotation path of the chair back 200. During the unfolding process of the folding chair, when the chair back 200 rotates to contact the protrusion 310, it is restricted by the protrusion 310 and cannot continue to rotate away from the upper surface of the chair plate 100. In other words, the protrusion 310 restricts the chair back 200 from rotating away from the upper surface of the chair plate 100. It is easy to understand that the protrusion 310 in this application is to ensure that the folding chair stops rotating when it reaches a certain position during the unfolding process, so that the chair back 200 can spontaneously remain stationary in this position, facilitating use by the user.

[0046] like Figure 1 In the embodiment shown, the folding chair provided by this application can be an office chair. The fixed connection between the support legs 400 and the chair plate 100 means that the support legs 400 and the chair plate 100 cannot move relative to each other in the fixed connection position. However, the support legs 400 and the chair plate 100 can be detached or fixed in the fixed connection position. In some embodiments, the support legs 400 are connected to the underside of the chair plate 100. In other embodiments, the support legs 400 can also be connected to both sides of the chair plate 100.

[0047] Furthermore, in some embodiments, the support leg 400 further includes a connecting rod and a roller assembly connected to each other. The connecting rod and the roller assembly can rotate relative to each other to enable relative rotation between the seat plate 100 and the roller assembly; specifically, the seat plate 100 rotates horizontally. The connecting rod and the roller assembly can also be telescopic to adjust the height of the seat plate 100.

[0048] In other embodiments, the folding chair provided by the present application may also be a household chair.

[0049] In some embodiments, as Figure 6 and Figure 7 As shown, the stopper 300 includes a connecting plate 320 and a limiting plate 330; the chair back 200 includes a back panel 220 and a connecting member 210 disposed on the back panel 220. The connecting plate 320 and the connecting member 210 are rotatably connected via a rotating shaft 214, allowing the connecting plate 320 and the connecting member 210 to rotate relative to each other. That is, the rotation of the connecting member 210 is synchronized with the rotation of the stopper 300. The stopper 300 only limits the rotation of the chair back 200 and does not affect other aspects. One end of the limiting plate 330 is disposed on the underside of the connecting plate 320 and below the rotating shaft 214, and the other end of the limiting plate 330 has a protrusion 310. In this embodiment, the rotating shaft 214 is disposed horizontally, and the rotation axis of the chair panel 100 and the chair back 200 relative to each other is the axis of the rotating shaft 214. The rotating shaft 214 can be a structural component independent of the connecting member 210 , the anti-rotation member 300 and the first side rod 110 , or it can be a protruding structure in the connecting member 210 , the anti-rotation member 300 or the first side rod 110 .

[0050] In other embodiments, one end of the limiting plate 330 may also be connected to the top of the rotating shaft 214. As long as the end of the protrusion 310 in the limiting plate 330 is located below the rotating shaft 214, so that the protrusion 310 contacts the chair back 200 from below the rotating shaft 214, the rotation of the chair back 200 can be restricted during the process of unfolding the folding chair.

[0051] In some embodiments, the first side bar 110 is a hollow structure with an opening at one end facing the chair back 200. One end of the stopper 300 is located inside the first side bar 110, while the other end, which is provided with a protrusion 310, is located outside the first side bar 110, thereby reducing the space occupied by the stopper 300 after being connected to the first side bar 110. Furthermore, if the first side bar 110 is a hollow structure, the first side bar 110 can be made of a commercially available metal tubular structural member, such as a metal square tube or a metal round tube. This not only makes the first side bar 110 lighter, but also reduces production costs. In other embodiments, the first side bar 110 can also be a solid structure, with the stopper 300 connected to the outside of the first side bar 110.

[0052] In some embodiments, the number of the connecting plate 320 may be one, and in other embodiments, the number of the connecting plate 320 may be two. As long as the anti-rotation member 300 can be connected to the connecting member 210, Figure 6As shown, the anti-rotation member 300 includes two connecting plates 320, which are disposed oppositely on either side of a limiting plate 330. Both connecting plates 320 are located within the first side bar 110 and connected to two opposing side walls within the first side bar 110 via the rotating shaft 214. One end of the limiting plate 330, which has a protrusion 310, is located outside the first side bar 110 to limit the rotation of the back plate 220. In this embodiment, the first side bar 110 and the connecting plates 320 in the anti-rotation member 300 are both connected to the rotating shaft 214.

[0053] Furthermore, a plastic shell-like structure 112 is provided at the end of the first side bar 110 facing the chair back 200. The shell-like structure 112 is sleeved onto the outside of the section of the first side bar 110. That is, the shell-like structure 112 covers the opening at the end of the first side bar 110 facing the chair back 200 to prevent debris from entering the first side bar 110, thereby reducing interference with the rotating shaft 214, thereby allowing the chair plate 100 and the chair back 200 to maintain relatively smooth relative rotation. In the case where the first side bar 110 is made of a metal tubular structure, the provision of the shell-like structure 112 can also cover burrs on the end of the first side bar 110, thereby providing a protective effect. The shell-like structure 112 can be only partially made of plastic, for example, the outer layer of the shell-like structure 112 can be plastic and the inner layer can be metal. Alternatively, the shell-like structure 112 can be entirely made of plastic.

[0054] Furthermore, a strip-shaped through hole is provided on the shell-like structural member 112 , and the strip-shaped through hole is used to allow the protrusion 310 to extend to the outside of the first side rod 110 .

[0055] In some embodiments, as Figure 4 and Figure 8As shown, the connecting member 210 includes opposite first side plates 211 and second side plates 212. The first side rod 110 is located between the first side plate 211 and the second side plate 212, and the first side plate 211, the first side rod 110, and the second side plate 212 are all connected to the rotating shaft 214. Therefore, the first side rod 110 can rotate relative to the connecting member 210, and further, the chair seat 100 and the chair back 200 can rotate relative to each other. Since the first side plate 211 and the second side plate 212 are arranged on both sides of the first side rod 110 and are both connected to the first side rod 110 through the rotating shaft 214, the force on the first side rod 110 is more balanced, making it more convenient for the chair seat 100 and the chair back 200 to rotate. Further, one connecting plate 320 in the rotation stopping member 300 is rotatably connected to one end of the rotating shaft 214 of the first side plate 211, and the other connecting plate 320 is rotatably connected to the other end of the rotating shaft 214 of the second side plate 212. Since both sides of the limiting plate 330 are rotatably connected to the connecting member 210 through the connecting plate 320, when the protruding portion 310 abuts against the chair back 200, both connecting plates 320 on both sides are stressed, making the force between the connecting member 210 and the rotation stopping member 300 more balanced, and the connection position between the connecting member 210 and the rotation stopping member 300 is not likely to be deformed.

[0056] Further, a vertically penetrating area is formed between the first side plate 211 and the second side plate 212, so that the end portion of the first side rod 110 can relatively rotate into or out of the space between the first side plate 211 and the second side plate 212.

[0057] In some embodiments, the end portions of the first side plate 211 and the second side plate 212 are directly connected to the back plate 220. In some other embodiments, as Figure 4 shown in Figure 8 shown, the connecting member 210 further includes a mounting plate 213. The connecting member 210 is an overall "U"-shaped structural member, and the first side plate 211 and the second side plate 212 are respectively connected to both sides of the mounting plate 213, and the mounting plate 213 is connected to the chair back 200.

[0058] In some embodiments, the rotation stopping member 300 restricts the rotation of the chair back 200 by contacting the side surface of the back plate 220. That is, during the unfolding process of the folding chair, the side surface of the rotating chair back 200 contacts the protruding portion 310 in the rotation stopping member 300. Here, the side surface of the chair back 200 refers to two opposite and larger surfaces in the chair back 200. In the use state, the user's back leans against one of the side surfaces. As Figure 5 shown, in the unfolded state of the folding chair, the edge of the protruding portion 310 away from the first side rod 110 is used to contact the rotating chair back 200 to restrict the rotation of the chair back 200.

[0059] Further, in Figures 5 to 7In the illustrated embodiment, the limiting plate 330 is a flat plate-shaped structure. In this embodiment, the structure of the rotation stop 300 is simple. In other embodiments, the limiting plate 330 may have other shapes, as long as the protrusion 310 contacts the side of the chair back 200 to limit the rotation of the chair back 200.

[0060] In some embodiments, the upper surface of the protrusion 310 is configured to contact the chair back 200 during rotation to limit the rotation of the chair back 200. In this embodiment, the contact between the protrusion 310 and the chair back 200 is surface contact, resulting in a large contact area between the protrusion 310 and the chair back 200, thereby effectively limiting the rotation of the chair back 200.

[0061] like Figures 8 to 10 As shown, the limiting plate 330 includes a first section 340 and a second section 350, the connecting plate 320 is connected to the first section 340, the protrusion 310 is located in the second section 350, and the upper surface of the first section 340 is higher than the upper surface of the protrusion 310. In this embodiment, the first section 340 is closer to the rotating shaft 214, which can reduce the size of the folding chair at the position where the rotating shaft 214 is provided, and facilitate the installation of the rotation stop 300 into the first side rod 110. The second section 350 is farther from the rotating shaft 214, so when a reaction force is applied to the chair back 200 to stop the chair back 200 from rotating, the force arm of the reaction force is larger, and therefore, the rotation of the chair back 200 can be better limited. That is, Figure 10 In the embodiment shown, the size of the connected related structures can be made smaller and a better anti-rotation effect can be achieved.

[0062] In some embodiments, as Figure 3 As shown, the chair panel 100 further includes a second side bar 120, a crossbar 130, and a strip structure 140. The second side bar 120 is arranged parallel to the first side bar 110, and both the second side bar 120 and the first side bar 110 are rotatably connected to the chair back 200. The first side bar 110 and the second side bar 120 are both connected to the same side of the crossbar 130. The strip structure 140 is arranged parallel to the crossbar 130, and one end of the strip structure 140 is connected to the first side bar 110 and the other end is connected to the second side bar 120.

[0063] The first side bar 110 and the second side bar 120 may have the same or different structures. Furthermore, the crossbeam 130, the first side bar 110, and the second side bar 120 may all be metal structural members, and the crossbeam 130 and the first side bar 110, as well as the crossbeam 130 and the second side bar 120, may all be welded. In other embodiments, the crossbeam 130, the first side bar 110, and the second side bar 120 may also be structural members made of other materials, and may be connected using threaded fasteners or other connection methods.

[0064] Furthermore, a reinforcement member is connected between the crossbeam 130 and the first side bar 110, with one end of the reinforcement member connected to the crossbeam 130 and the other end connected to the first side bar 110. The reinforcement member serves to strengthen the structure and, as will be appreciated, possesses a certain degree of rigidity. In some embodiments, the reinforcement member is a metal structural member, and is welded to both the crossbeam 130 and the first side bar 110.

[0065] In some embodiments, a reinforcement member may be disposed below the cross beam 130 and the first side bar 110. In this embodiment, the reinforcement member may be a flat metal structural member.

[0066] In some other embodiments, the reinforcement member may also be provided at a position where the first side bar 110 and the cross beam 130 form an angle. In this embodiment, if the first side bar 110 is perpendicular to the cross beam 130 , the reinforcement member is an L-shaped structural member.

[0067] In some embodiments, a flat first reinforcement member 151 may be provided below the crossbeam 130 and the first side bar 110 , and an L-shaped second reinforcement member 152 may be provided at a position where the crossbeam 130 and the first side bar 110 form an angle.

[0068] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A folding chair, characterized in that: It includes a chair back, a seat plate and a support leg, wherein the seat plate is rotatably connected to the chair back and the seat plate is fixedly connected to the support leg; the chair plate includes a first side rod extending toward the chair back; a stopper is provided at the end of the first side rod facing the chair back, the stopper has a protrusion extending toward the chair back, the protrusion is located on the rotation path of the chair back, and the protrusion is configured to: contact the chair back during the opening process of the folding chair to limit the chair back from rotating in a direction away from the upper surface of the seat plate.

2. The folding chair according to claim 1, characterized in that The anti-rotation part includes a connecting plate and a limiting plate, the chair back includes a back plate and a connecting part arranged on the back plate, the connecting plate and the connecting part are rotatably connected through a rotating shaft, one end of the limiting plate is arranged on the lower side of the connecting plate and below the rotating shaft, and the other end of the limiting plate has the protrusion.

3. The folding chair according to claim 2, characterized in that The first side rod is a hollow structure and has an opening at one end facing the chair back. The connecting plate is located inside the first side rod and is connected to the two opposite side walls inside the first side rod through the rotating shaft. The end of the limiting plate having the protrusion is located outside the first side rod.

4. The folding chair according to claim 3, characterized in that: A shell-like structure is further provided at one end of the first side rod facing the chair back. The shell-like structure is a plastic structural part and is sleeved on the outside of the end of the first side rod. The shell-like structure is provided with a strip-shaped through hole so that the protrusion extends from the inside of the first side rod.

5. The folding chair according to claim 2, characterized in that: The connecting member includes a first side plate and a second side plate opposite to each other, the first side rod is located between the first side plate and the second side plate, and the first side plate, the second side plate and the first side rod are all rotatably connected to the rotating shaft.

6. The folding chair according to claim 5, characterized in that: Two sides of the limiting plate are each connected to a connecting plate, and one connecting plate and the first side plate are rotatably connected to one end of the rotating shaft, and the other connecting plate and the second side plate are rotatably connected to the other end of the rotating shaft.

7. The folding chair according to claim 5, characterized in that A vertically penetrating area is formed between the first side plate and the second side plate, so that the protrusion can be rotated into or out of between the first side plate and the second side plate.

8. The folding chair according to any one of claims 2 to 7, characterized in that: The edge of the protrusion away from the first side rod is used to contact the seat back during the rotation process to limit the rotation of the seat back.

9. The folding chair according to any one of claims 2 to 7, characterized in that: The upper surface of the protrusion is used to contact the seat back during the rotation process to limit the rotation of the seat back.

10. The folding chair according to claim 9, characterized in that The limiting plate includes a first section and a second section, the connecting plate is connected to the first section, and the protruding portion is located in the second section; the upper surface of the first section is higher than the upper surface of the protruding portion.

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