Folding chair

Abstract

The utility model discloses a folding chair which comprises a flexible contact piece and a chair frame device used for supporting the flexible contact piece, the chair frame device comprises a front shear fork support, a rear shear fork support, a left shear fork support, a right shear fork support, a supporting rod and a backrest rod, and the folding chair has an unfolding state and a folding state of being folded into a bundle. The front and rear sides of the left and right scissor supports are rotatably connected with the left and right sides of the front and rear scissor supports respectively; when the chair frame device is in an unfolded state, the lower end of the backrest rod is rotatably connected to a first position, the first sleeve piece slidably sleeves a third position, the upper end of the supporting rod is rotatably connected to a second position, and the lower end of the supporting rod is rotatably connected with a second sleeve piece sleeving a fourth position. The first sleeve is arranged close to the upper end of the backrest rod, and the second sleeve is arranged away from the front end of the first rod. The folding chair can be flexibly unfolded or folded according to different use scenes, the space is greatly saved during folding, and the folding chair is convenient to store, carry and transport.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a folding chair. Background Art

[0002] With the improvement of people's living standards, people's requirements for daily necessities are also getting higher and higher. Chairs are essential furniture in people's daily lives. Traditional chairs have complex structures, are not easy to fold, and have a relatively small seat area for supporting the human body. For example, a chair and a chair backrest disclosed in a Chinese patent with the publication number CN220756963U include a support mechanism and a seat mechanism fixedly connected to the support mechanism. Although this chair has good stability, due to its fixed structure, its volume is relatively large, making it not easy to store, carry, and transport, and it is not suitable for occasions such as outdoors, meeting rooms, and event venues where the size of the chair needs to be adjusted flexibly. Summary of the Invention

[0003] Aiming at the deficiencies in the prior art, the utility model provides a folding chair that can be flexibly unfolded or folded, greatly saving space when folded, and being convenient for storage, carrying, and transportation.

[0004] A folding chair provided by the utility model includes a flexible contact member and a chair frame device for supporting the flexible contact member away from the medium surface. The chair frame device includes a front scissor bracket, a rear scissor bracket, a left scissor bracket, a right scissor bracket, a support rod, and a backrest rod, and has an unfolded state and a folded state where it is folded into a bundle. The front and rear sides of the left and right scissor brackets are respectively rotatably connected to the left and right sides of the front and rear scissor brackets; the left and right scissor brackets respectively include a first rod and a second rod that are arranged crosswise and rotatably connected, the front and rear scissor brackets respectively include a third rod and a fourth rod that are arranged crosswise and rotatably connected. The second rod has a first position spaced from its rear end and a second position spaced from its front end, the backrest rod has a third position spaced from its upper end, the first rod has a fourth position spaced from its front end. When the chair frame device is in the unfolded state, the lower end of the backrest rod is rotatably connected to the first position, a first sleeve that is respectively rotatably connected to the upper ends of a first rod and a fourth rod is slidably sleeved on the third position of the backrest rod, the upper end of the support rod is rotatably connected to the second position, and the lower end is rotatably connected to a second sleeve sleeved on the fourth position. When the chair frame device is in the folded state, the first sleeve is arranged close to the upper end of the backrest rod, and the second sleeve is arranged away from the front end of the first rod.

[0005] Preferably, a first connecting member is provided at the upper end of the fourth rod of the front scissor support, and a second connecting member is provided at the front end of the second rod of the right scissor support. The upper end of the fourth rod of the front scissor support and the front end of the second rod of the right scissor support are rotatably connected through the first connecting member and the second connecting member; and / or, a first connecting member is provided at the upper end of the third rod of the front scissor support, and a second connecting member is provided at the front end of the second rod of the left scissor support. The upper end of the third rod of the front scissor support and the front end of the second rod of the left scissor support are rotatably connected through the first connecting member and the second connecting member;

[0006] Preferably, the first connecting member includes a first connecting end and a first rotating end arranged at an angle with the first connecting end, and the second connecting member includes a second connecting end and a second rotating end arranged at an angle with the second connecting end. The first rotating end and the second rotating end are rotatably connected.

[0007] Preferably, the angle between the first connecting end and the first rotating end is less than 180° and greater than or equal to 90°, and the angle between the second connecting end and the second rotating end is less than 180° and greater than or equal to 90°.

[0008] Preferably, the first rotating end includes a first rotating body and a first rotating connecting portion extending along the length direction of the first rotating body. Opposite sides of the first rotating connecting portion and the first rotating body surround to form a first rotating groove and a second rotating groove; the second rotating end includes a second rotating body, and a second rotating connecting portion and a third rotating connecting portion respectively extending along the length direction of the second rotating body. The second rotating connecting portion and the third rotating connecting portion are arranged at intervals and surround with the second rotating body to form a third rotating groove; the first rotating connecting portion, the second rotating connecting portion and the third rotating connecting portion are rotatably connected through a first rotating shaft. After connection, the first rotating connecting portion is arranged in the third rotating groove and can rotate in the third rotating groove, and the second rotating connecting portion and the third rotating connecting portion are respectively arranged in the first rotating groove and the second rotating groove and can rotate in the first rotating groove and the second rotating groove.

[0009] Preferably, a first connecting groove is recessed from the end face of the first connecting end, and the first connecting groove is sleeved and installed at the front end of the second rod of the left scissor support or the front end of the second rod of the right scissor support; a second connecting groove is recessed from the end face of the second connecting end, and the second connecting groove is sleeved and installed at the upper end of the third rod of the front scissor support or the upper end of the fourth rod of the front scissor support.

[0010] Preferably, the first rod member and the support rod are arranged outside the second rod member. The second kit includes a sliding sleeve portion slidably connected to the front of the first rod member, and a first mounting plate and a second mounting plate respectively extending forward from the sliding sleeve portion. The first mounting plate and the second mounting plate are arranged at intervals and form a fourth rotation groove around the sliding sleeve portion. The lower end of the support rod, the first mounting plate and the second mounting plate are rotatably connected by a second rotating shaft.

[0011] Preferably, the first kit includes a first base plate, a first rotating seat and a second rotating seat protruding from the bottom side of the first base plate. A sliding sleeve channel is formed on the first base plate. The first kit is sleeved on the backrest rod through the sliding sleeve channel and is slidably connected to the upper part of the backrest rod. The first rotating seat is arranged in front of the sliding sleeve channel and is rotatably connected to the rear end of the first rod member. The second rotating seat is arranged on the side of the sliding sleeve channel and is rotatably connected to the upper end of the third rod member or the upper end of the fourth rod member of the rear scissor bracket.

[0012] Preferably, the first rod member, the support rod and the backrest rod are arranged outside the second rod member, and the third rod member is arranged outside the fourth rod member. Between the front end of the first rod member of the right scissor bracket and the lower end of the third rod member of the front scissor bracket, between the front end of the first rod member of the left scissor bracket and the lower end of the fourth rod member of the front scissor bracket, between the second rod member of the right scissor bracket and the lower end of the third rod member of the rear scissor bracket, and between the second rod member of the left scissor bracket and the lower end of the fourth rod member of the rear scissor bracket are respectively rotatably connected by a connecting seat. The connecting seat includes a second base plate for mounting on the surface of the medium, and a third rotating seat and a fourth rotating seat protruding from the top side of the second base plate. The third rotating seat and the fourth rotating seat are respectively rotatably connected to the corresponding rod members.

[0013] Preferably, the height of the upper end of the backrest rod is higher than the height of the upper end of the front scissor bracket. A positioning member is arranged at the upper end of the backrest rod. The positioning member includes a mounting portion connected to the backrest rod and a positioning portion arranged at an angle with the mounting portion. The rear part of the flexible contact member is sleeved on the positioning member, and the front part is sleeved on the upper ends of the third rod member and the fourth rod member of the front scissor bracket, and the front ends of the second rod members of the left and right scissor brackets.

[0014] The utility model has the following beneficial effects:

[0015] The chair frame device of the folding chair has a folded state and an unfolded state. In the unfolded state, the front, rear, left and right scissor brackets are respectively spread out, and the upper and lower ends of the support rod are respectively supported at a second position on the second rod and a fourth position on the first rod, so that the support rod, the first rod and the second rod form a triangular support structure, thereby preventing the left and right scissor brackets from deforming, and further preventing the front, rear, left and right scissor brackets from deforming as a whole, ensuring the stability of the chair frame device in the unfolded state, and the first set is sleeved at the third position on the backrest rod, and the lower end of the backrest rod is supported at the first position on the second rod, so that the backrest rod, the first rod and the second rod form a triangular support structure, further preventing the left and right scissor brackets from deforming, and improving the chair frame device. The stability of the unfolded state is ensured; in the folded state, the front, rear, left and right scissor brackets are folded into bundles with each other, and the lower end of the support rod slides in a direction away from the front end of the first rod through the second kit, so that the support rod is folded to the side of the first rod or the second rod, and at the same time, the upper ends of the first rod and the fourth rod slide in a direction close to the upper end of the backrest rod through the first kit, so that the backrest rod is folded to the side of the first rod or the second rod, ensuring that the front, rear, left and right scissor brackets can be deformed and folded respectively, and the operation is simple and convenient, and can be flexibly unfolded or folded according to different usage scenarios, and greatly saves space when folded, which is convenient for storage. In addition, the entire chair frame device adopts a rod structure setting, which is simple and lightweight, and is easy to carry and transport.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 The utility model discloses a chair frame device according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the side structure of a chair frame device disclosed in one embodiment of the utility model.

[0020] Figure 3 It is a partial structural schematic diagram of a first connecting member and a second connecting member disclosed in an embodiment of the utility model.

[0021] Figure 4 It is a schematic structural diagram of a first connecting member and a second connecting member disclosed in an embodiment of the utility model.

[0022] Figure 5Schematic diagram of the first connecting member disclosed in an embodiment of the present utility model.

[0023] Figure 6 Schematic diagram of the second connecting member disclosed in an embodiment of the present utility model.

[0024] Figure 7 Partial schematic diagram of the second kit disclosed in an embodiment of the present utility model.

[0025] Figure 8 Schematic diagram of the second kit disclosed in an embodiment of the present utility model.

[0026] Figure 9 Partial schematic diagram of the first kit disclosed in an embodiment of the present utility model.

[0027] Figure 10 Schematic diagram of the first kit disclosed in an embodiment of the present utility model.

[0028] Figure 11 Schematic diagram of the connecting seat disclosed in an embodiment of the present utility model.

[0029] Figure 12 Schematic diagram of the positioning member disclosed in an embodiment of the present utility model. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments 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 some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0032] In the present utility model, unless otherwise clearly defined or limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly defined or limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0034] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the field to which the present utility model pertains. The "first", "second" and similar terms used in the description and claims of the patent application of the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not denote a quantity limitation, but indicate the existence of at least one.

[0035] Such as Figure 1-2As shown in the figure, as an embodiment of the present utility model, a folding chair is disclosed, which includes a flexible contact member and a chair frame device for supporting the flexible contact member away from medium surfaces such as indoor ground, floor surface, outdoor land surface, etc. The flexible contact member is used to support the user to sit or lie on. In a specific embodiment, the flexible contact member can be selected from fiber fabrics such as cotton and linen, or can also be selected from artificial fiber fabrics such as nylon, or materials such as canvas that are economical and durable. The chair frame device includes a front scissor bracket 1, a rear scissor bracket 2, a left scissor bracket 3, a right scissor bracket 4, a support rod 5, and a backrest rod 6. The front and rear sides of the left and right scissor brackets are respectively rotatably connected to the left and right sides of the front and rear scissor brackets; the left and right scissor brackets respectively include a first rod 7 and a second rod 8 that are arranged crosswise and rotatably connected, and the front and rear scissor brackets respectively include a third rod 9 and a fourth rod 10 that are arranged crosswise and rotatably connected. The crosswise arrangement structure between the rods makes the chair easy to fold, and there will be no position conflict when the rods are stacked on each other. There is a first position 11 spaced from its rear end on the second rod 8, and a second position 12 spaced from its front end, there is a third position 13 spaced from its upper end on the backrest rod 6, and there is a fourth position 14 spaced from its front end on the first rod 7. The backrest rod 6, the first rod 7, and the second rod 8 form a triangular structure, and the support rod 5, the first rod 7, and the second rod 8 also form another triangular structure, which is beneficial to the stable support of the structure in the unfolded state of the chair. In this embodiment, the first position 11, the second position 12, the third position 13, and the fourth position 14 are symmetrically distributed on the left and right scissor brackets, and the structural arrangement is uniform, which is convenient for quick unfolding and folding. In another embodiment, the first position 11, the second position 12, the third position 13, and the fourth position 14 on the left and right scissor brackets may not be symmetrically arranged. When the chair frame device is in the unfolded state, the lower end of the backrest rod 6 is rotatably connected to the first position 11, and a first sleeve 15 that is rotatably connected to the upper ends of a first rod 7 and a fourth rod 10 respectively is slidably sleeved on the third position 13 of the backrest rod. The upper end of the support rod 5 is rotatably connected to the second position 12, and the lower end is rotatably connected to a second sleeve 16 sleeved on the fourth position 14. When the chair frame device is in the folded state, the first sleeve 15 is arranged close to the upper end of the backrest rod 6, and the second sleeve 16 is arranged away from the front end of the first rod 7.In this embodiment, the chair frame device of the folding chair has a folded state and an unfolded state. In the unfolded state, the front, rear, left and right scissor brackets are respectively spread out, and the upper and lower ends of the support rod 5 are respectively supported at the second position 12 on the second rod 8 and the fourth position 14 on the first rod 7, so that the support rod 5 and the first rod 7 and the second rod 8 form a triangular support structure, thereby preventing the left and right scissor brackets from deforming, and further preventing the front, rear, left and right scissor brackets from deforming as a whole, ensuring the stability of the chair frame device in the unfolded state, and the first kit 15 is sleeved on the third position 13 on the backrest rod 6, and the lower end of the backrest rod 6 is supported at the first position 11 on the second rod 8, so that the backrest rod 6 and the first rod 7 and the second rod 8 form a triangular support structure, further preventing the left and right scissor brackets from deforming. The stability of the chair frame device in the unfolded state is improved; in the folded state, the front, rear, left and right scissor brackets are folded into a bundle with each other, and the lower end of the support rod 5 slides in the direction away from the front end of the first rod 7 through the second kit 16, so that the support rod 5 is folded on the side of the first rod 7 or the second rod 8. At the same time, the upper ends of the first rod 7 and the fourth rod 10 slide in the direction close to the upper end of the backrest rod 6 through the first kit 15, so that the backrest rod 6 is folded on the side of the first rod 7 or the second rod 8, ensuring that the front, rear, left and right scissor brackets can be deformed and folded respectively. The operation is simple and convenient, and it can be flexibly unfolded or folded according to different usage scenarios. It greatly saves space when folded, which is convenient for storage. In addition, the entire chair frame device adopts a rod structure setting, which is simple and lightweight, and is easy to carry and transport.

[0036] In a specific embodiment, Figure 3As shown in the figure, a first connecting member 17 is provided at the upper end of the fourth rod member 10 of the front scissors support 1, and a second connecting member 18 is provided at the front end of the second rod member 8 of the right scissors support 4. The upper end of the fourth rod member 10 of the front scissors support 1 and the front end of the second rod member 8 of the right scissors support 4 are rotatably connected through the first connecting member 17 and the second connecting member 18; a first connecting member 17 is provided at the upper end of the third rod member 9 of the front scissors support 1, and a second connecting member 18 is provided at the front end of the second rod member 8 of the left scissors support 3. The upper end of the third rod member 9 of the front scissors support 1 and the front end of the second rod member 8 of the left scissors support 3 are rotatably connected through the first connecting member 17 and the second connecting member 18. The connection structures between the upper ends on both sides of the front scissors support 1 and the upper sides of the front ends of the left and right scissors supports are the same and symmetrically arranged, with a simple structural design and convenient production and assembly. In some other embodiments, the first connecting member 17 and the second connecting member 18 are provided between the upper end of the fourth rod member 10 of the front scissors support 1 and the front end of the second rod member 8 of the right scissors support 4, and are simultaneously rotatably connected between the upper end of the third rod member 9 of the front scissors support 1 and the front end of the second rod member 8 of the left scissors support 3 through other rotational connection structures; or the first connecting member 17 and the second connecting member 18 are provided between the upper end of the third rod member 9 of the front scissors support 1 and the front end of the second rod member 8 of the left scissors support 3, and are simultaneously rotatably connected between the upper end of the fourth rod member 10 of the front scissors support 1 and the front end of the second rod member 8 of the right scissors support 4 through other rotational connection structures. These embodiments can all achieve the rotational connection between the upper end of the front scissors support 1 and the left and right side supports respectively.

[0037] In a specific embodiment, such as Figure 4As shown, the first connecting member 17 includes a first connecting end 19 and a first rotating end 20 arranged at an angle with respect to the first connecting end 19. The second connecting member 18 includes a second connecting end 21 and a second rotating end 22 arranged at an angle with respect to the second connecting end 21. The first rotating end 20 and the second rotating end 22 are rotatably connected. The rotating ends and the connecting ends of the two connecting members are arranged at an angle. On the one hand, when the first rotating end 20 and the second rotating end 22 are folded in half while being in the same plane, the first connecting end 19 and the second connecting end 21 can be arranged at a relative interval, so as to ensure that the fourth rod 10 of the front scissor bracket 1 and the second rod 8 of the right scissor bracket 4 can be relatively folded while being in the same plane, and the third rod 9 of the front scissor bracket 1 and the second rod 8 of the left scissor bracket 3 can be relatively folded while being in the same plane, making the structural arrangement between the rods of the folding chair in the folded state more compact, thereby further reducing the space occupied by the folding chair and facilitating storage, carrying and transportation. On the other hand, when the first rotating end 20 and the second rotating end 22 are relatively unfolded, the first connecting end 19, the second connecting end 21, the first rotating end 20 and the second rotating end 22 form a U-shaped structure. Compared with some V-shaped structures or I-shaped structures on the market, the sharpness is reduced, and the abutting area with the flexible contact member is increased, making it easier for the flexible contact member to be installed and positioned by sleeving on this structure, and being able to better disperse and bear the force received at the connecting part, improving the overall structural strength and load-bearing capacity of the chair frame device.

[0038] In a specific embodiment, the angle between the first connecting end 19 and the first rotating end 20 is less than 180° and greater than or equal to 90°, especially preferably less than 130° and greater than 100°, and preferably 120°. The angle between the second connecting end 21 and the second rotating end 22 is less than 180° and greater than or equal to 90°, especially preferably less than 130° and greater than 100°, and preferably 120°. This angle range can ensure that between the fourth rod 10 of the front scissor bracket 1 and the second rod 8 of the right scissor bracket 4, and between the third rod 9 of the front scissor bracket 1 and the second rod 8 of the left scissor bracket 3, while being able to be as close as possible to the folded state in the same plane, the sharpness of the U-shaped structure is reduced, and the abutting area between the U-shaped structure and the flexible contact member is increased, so as to ensure the overall structural strength and load-bearing capacity of the chair frame device while minimizing the space occupied by the folding chair in the folded state.

[0039] In a specific embodiment, as Figure 5-6As shown, the first rotating end 20 includes a first rotating body 23 and a first rotating connecting portion 24 extending along the length direction of the first rotating body 23. Opposite sides of the first rotating connecting portion 24 and the first rotating body 23 surround to form a first rotating groove 25 and a second rotating groove 26 respectively. The second rotating end 22 includes a second rotating body 27, a second rotating connecting portion 28 and a third rotating connecting portion 29 respectively extending along the length direction of the second rotating body 27. The second rotating connecting portion 28 and the third rotating connecting portion 29 are arranged at intervals from each other and surround with the second rotating body 27 to form a third rotating groove 30. The first rotating connecting portion 24, the second rotating connecting portion 28 and the third rotating connecting portion 29 are rotatably connected by a first rotating shaft (not shown in the figure). After connection, the first rotating connecting portion 24 is arranged in the third rotating groove 30 and can rotate in the third rotating groove 30. The first rotating shaft can be set as structures such as rivets and bolts. The second rotating connecting portion 28 and the third rotating connecting portion 29 are respectively arranged in the first rotating groove 25 and the second rotating groove 26 and can rotate in the first rotating groove 25 and the second rotating groove 26. In this embodiment, since there are two rotating connecting portions, namely the second rotating connecting portion 28 and the third rotating connecting portion 29, in the second rotating end 22, on the one hand, compared with the connection between a single rotating connecting portion, stress concentration is reduced, the risk of damage to the connecting piece is decreased, and the service life of the connecting piece and the chair is prolonged. On the other hand, when the first rotating end 20 rotates relative to the second rotating end 22, the two sides of the first rotating connecting portion 24 can be limited respectively through the second rotating connecting portion 28 and the third rotating connecting portion 29, avoiding the torsion of the first rotating connecting portion 24 relative to the second rotating end 22 or the first rotating shaft, so as to ensure the stable rotation of the first rotating end 20 relative to the second rotating end 22 around the axis of the first rotating shaft, making the unfolding or folding process of the folding chair smoother and easier, and facilitating the quick unfolding or folding of the folding chair. In other embodiments, only one of the second rotating connecting portion 28 and the third rotating connecting portion 29 can also be provided, and the rotatable connection between the first rotating end 20 and the second rotating end 22 can also be achieved.

[0040] In a specific embodiment, a first connection groove 32 is formed by recessing from the end face of the first connection end 19, and the first connection groove 32 is sleeved and installed at the front end of the second rod member 8 of the left scissors support 3 or the front end of the second rod member 8 of the right scissors support 4; a second connection groove 33 is formed by recessing from the end face of the second connection end 21, and the second connection groove 33 is sleeved and installed at the upper end of the third rod member 9 of the front scissors support 1 or the upper end of the fourth rod member 10 of the front scissors support 1. In this embodiment, the first connecting member 17 and the second connecting member 18 are respectively arranged as independent structures, and are respectively sleeved on the connecting rod through the first connection groove 32 and the second connection groove 33, and are fixed by fixing connection structures such as bolts and welding, which is convenient for production and assembly. In some other embodiments, the first connecting member 17 and the third rod member 9 or the fourth rod member 10 can also be arranged as an integral structure, or the second connecting member 18 and the second rod member 8 can be arranged as an integral structure to improve the structural stability.

[0041] In a specific embodiment, as Figure 7-8 shown, the first rod member 7 and the support rod 5 are arranged outside the second rod member 8, so that there is no position conflict between the first rod member 7 and the support rod 5 when they are folded, and the overall folded structure is more compact, which can further reduce the space occupied by the folding chair and is more convenient to carry and transport. The second kit 16 includes a sliding sleeve portion 34 slidably connected to the front portion of the first rod member 7, and a first mounting plate 35 and a second mounting plate 36 respectively extending forward from the sliding sleeve portion 34. The first mounting plate 35 and the second mounting plate 36 are arranged at intervals from each other, and together with the sliding sleeve portion 34 form a fourth rotation groove 37, and the width of the fourth rotation groove 37 can accommodate at least the support rod 5. The lower end of the support rod 5, the first mounting plate 35 and the second mounting plate 36 are rotatably connected by a second rotating shaft (not shown in the figure), and the second rotating shaft can be arranged as a structure such as a rivet or a bolt. When the lower end of the support rod 5 rotates relative to the second kit 16, the two sides of the support rod 5 are respectively limited by the first mounting plate 35 and the second mounting plate 36, so as to prevent the support rod 5 from twisting relative to the first mounting plate 35, the second mounting plate 36 or the second rotating shaft, thereby ensuring that the lower end of the support rod 5 rotates stably relative to the second kit 16 around the axis of the second rotating shaft, and further making the folding chair more smooth and easy during the unfolding or folding process, and facilitating the quick unfolding or folding of the folding chair.

[0042] In a specific embodiment, as Figure 9-10As shown in the figure, the first set 15 includes a first base plate 39, a first rotating seat 40 and a second rotating seat 41 protruding from the bottom side of the first base plate 39. A sliding sleeve channel 42 is formed on the first base plate 39. The first set 15 is sleeved on the backrest rod 6 through the sliding sleeve channel 42 and is slidably connected to the upper part of the backrest rod 6. The width of the sliding sleeve channel 42 is set to be greater than the diameter of the backrest rod 6, and the length of the sliding sleeve channel 42 in the front-back direction of the chair frame device is slightly greater than the diameter of the backrest rod 6, so that the backrest rod 6 can move within a certain range in the front-back direction relative to the left, right, and rear scissor brackets, facilitating the quick folding or unfolding of the folding chair. The first rotating seat 40 is arranged in front of the sliding sleeve channel 42 and is rotatably connected to the rear end of the first rod 7. The second rotating seat 41 is arranged on the side of the sliding sleeve channel 42 and is rotatably connected to the upper end of the third rod 9 or the upper end of the fourth rod 10 of the rear scissor bracket 2. In this embodiment, the first set 15 can be used simultaneously for the rotational connection between the fourth rod 10 of the rear scissor bracket and the first rod 7 of the right scissor bracket, and the sliding connection between the backrest rod 6 and the rear scissor bracket and the right scissor bracket. Another first set 15 can be used simultaneously for the rotational connection between the third rod 9 of the rear scissor bracket and the first rod 7 of the left scissor bracket, and the sliding connection between the backrest rod 6 and the rear scissor bracket and the left scissor bracket, so that the first set 15 has the effect of multi-purpose use, simplifying the structure.

[0043] In a specific embodiment, the first rod 7, the support rod 5, and the backrest rod 6 are arranged outside the second rod 8, and the third rod 9 is arranged outside the fourth rod 10, so that the rods will not have position conflicts when the chair frame is in the folded state, thus saving space and facilitating storage, carrying, and transportation. Between the front end of the first rod 7 of the right scissor bracket 4 and the lower end of the third rod 9 of the front scissor bracket 1, between the front end of the first rod 7 of the left scissor bracket 3 and the lower end of the fourth rod 10 of the front scissor bracket 1, between the second rod 8 of the right scissor bracket 4 and the lower end of the third rod 9 of the rear scissor bracket 2, and between the second rod 8 of the left scissor bracket 3 and the lower end of the fourth rod 10 of the rear scissor bracket 2, they are respectively rotatably connected through a Figure 11 connection seat 43 as shown in the figure. The connection seat 43 includes a second base plate 44 for mounting on the surface of the medium, and a third rotating seat 45 and a fourth rotating seat 46 protruding from the top side of the second base plate 44. The third rotating seat 45 and the fourth rotating seat 46 are respectively rotatably connected to the corresponding rods, so that the connection seat 43 has the effect of multi-purpose use, simplifying the structure. In this embodiment, the second base plate 44 of the connection seat 43 is in direct contact with the surface of the medium such as the ground or tiles, and an anti-slip structure can be provided on the second base plate 44 to make it have an anti-slip effect and improve the stability of the folding chair when placed.

[0044] In a specific embodiment, the height of the upper end of the backrest rod 6 is higher than the height of the upper end of the front scissor bracket 1, as Figure 12As shown, a positioning member 47 is provided at the upper end of the backrest rod 6. The positioning member 47 includes a mounting portion 48 connected to the backrest rod 6 and a positioning portion 49 arranged at an angle to the mounting portion. The length of the positioning portion 49 is greater than the diameter of the mounting portion 48, so as to increase the contact area with the flexible contact member and improve the stability of the installation and positioning of the flexible contact member. The rear part of the flexible contact member is sleeved on the positioning member 47, and the front part is sleeved on the upper ends of the third rod 9 and the fourth rod 10 of the front scissor bracket 1, as well as the front ends of the second rods 8 of the left and right scissor brackets. The front side surface of the flexible contact member arranged between the two side backrest rods 6 forms a backrest, and the top surface of the flexible contact member arranged between the lower end of the backrest and the first connecting member 17 and the second connecting member 18 on both sides forms a seat surface. An arc-shaped abutting surface extending from the backrest surface to the seat surface is formed on the flexible contact member, which can better fit the curve of the human back, provide good support, make the user more comfortable and relaxed, and is especially suitable for lying and sitting.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

[0046] In summary, the above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the patent of the present invention.

Claims

1. A folding chair, characterized in that: The chair frame device comprises a flexible contact member and a chair frame device for supporting the flexible contact member away from a medium surface, wherein the chair frame device comprises a front scissor bracket, a rear scissor bracket, a left scissor bracket, a right scissor bracket, a support rod, and a backrest rod, and has an unfolded state and a folded state folded into a bundle, and the front and rear sides of the left and right scissor brackets are rotatably connected to the left and right sides of the front and rear scissor brackets respectively; The left and right scissor brackets respectively include a first rod and a second rod which are arranged crosswise and rotatably connected to each other, and the front and rear scissor brackets respectively include a third rod and a fourth rod which are arranged crosswise and rotatably connected to each other, the second rod has a first position which is spaced apart from its rear end, and a second position which is spaced apart from its front end, the backrest rod has a third position which is spaced apart from its upper end, and the first rod has a fourth position which is spaced apart from its front end, when the chair frame device is in an unfolded state, the lower end of the backrest rod is rotatably connected to the first position, and the third position of the backrest rod is slidably sleeved with a first set which is rotatably connected to the upper ends of the first rod and the fourth rod respectively, the upper end of the support rod is rotatably connected to the second position, and the lower end is rotatably connected with a second set which is sleeved on the fourth position, and when the chair frame device is in a folded state, the first set is arranged close to the upper end of the backrest rod, and the second set is arranged away from the front end of the first rod.

2. The folding chair according to claim 1, characterized in that: A first connecting member is provided at the upper end of the fourth rod of the front scissor bracket, a second connecting member is provided at the front end of the second rod of the right scissor bracket, and the upper end of the fourth rod of the front scissor bracket and the front end of the second rod of the right scissor bracket are rotatably connected via the first connecting member and the second connecting member; and / or, A first connecting member is provided at the upper end of the third rod of the front scissors bracket, and a second connecting member is provided at the front end of the second rod of the left scissors bracket. The upper end of the third rod of the front scissors bracket and the front end of the second rod of the left scissors bracket are rotatably connected through the first connecting member and the second connecting member.

3. The folding chair according to claim 2, characterized in that: The first connecting member includes a first connecting end and a first rotating end arranged at an angle to the first connecting end, the second connecting member includes a second connecting end and a second rotating end arranged at an angle to the second connecting end, and the first rotating end is rotatably connected to the second rotating end.

4. The folding chair according to claim 3, characterized in that: The angle between the first connecting end and the first rotating end is less than 180° and greater than or equal to 90°, and the angle between the second connecting end and the second rotating end is less than 180° and greater than or equal to 90°.

5. The folding chair according to claim 3, characterized in that: The first rotating end comprises a first rotating body and a first rotating connection portion extending along the length direction of the first rotating body, and opposite sides of the first rotating connection portion are respectively surrounded by the first rotating body to form a first rotating groove and a second rotating groove; The second rotating end includes a second rotating body, and a second rotating connection portion and a third rotating connection portion respectively extending along the length direction of the second rotating body, the second rotating connection portion and the third rotating connection portion are arranged at intervals from each other, and surround the second rotating body to form a third rotating groove; The first rotating connection part, the second rotating connection part and the third rotating connection part are rotatably connected through the first rotating shaft. After the connection, the first rotating connection part is arranged in the third rotating groove and can rotate in the third rotating groove, and the second rotating connection part and the third rotating connection part are respectively arranged in the first rotating groove and the second rotating groove and can rotate in the first rotating groove and the second rotating groove.

6. The folding chair according to claim 5, characterized in that: The first connecting end is recessed from its end surface to form a first connecting groove, and the first connecting groove is sleeved and installed on the front end of the second rod of the left scissors bracket or the front end of the second rod of the right scissors bracket; the second connecting end is recessed from its end surface to form a second connecting groove, and the second connecting groove is sleeved and installed on the upper end of the third rod of the front scissors bracket or the upper end of the fourth rod of the front scissors bracket.

7. The folding chair according to any one of claims 1 to 6, characterized in that: The first rod and the support rod are arranged on the outside of the second rod, and the second kit includes a sliding sleeve portion slidably connected to the front part of the first rod, and a first mounting plate and a second mounting plate respectively extending forward from the sliding sleeve portion, the first mounting plate and the second mounting plate are arranged at intervals from each other, and form a fourth rotation groove around the sliding sleeve portion, and the lower end of the support rod, the first mounting plate and the second mounting plate are rotatably connected through a second rotating shaft.

8. The folding chair according to any one of claims 1 to 6, characterized in that: The first kit includes a first base plate, a first rotating seat and a second rotating seat protruding from the bottom side of the first base plate, a sliding sleeve channel is opened on the first base plate, the first kit is sleeved on the backrest rod through the sliding sleeve channel and is slidably connected to the upper part of the backrest rod, the first rotating seat is arranged in front of the sliding sleeve channel and is rotatably connected to the rear end of the first rod, and the second rotating seat is arranged on the side of the sliding sleeve channel and is rotatably connected to the upper end of the third rod or the upper end of the fourth rod of the rear scissors bracket.

9. The folding chair according to any one of claims 1 to 6, characterized in that: The first rod, support rod and backrest rod are arranged on the outside of the second rod, and the third rod is arranged on the outside of the fourth rod. The front end of the first rod of the right scissors bracket and the lower end of the third rod of the front scissors bracket, the front end of the first rod of the left scissors bracket and the lower end of the fourth rod of the front scissors bracket, the second rod of the right scissors bracket and the lower end of the third rod of the rear scissors bracket, and the second rod of the left scissors bracket and the lower end of the fourth rod of the rear scissors bracket are rotatably connected through a connecting seat, respectively. The connecting seat includes a second base plate for installation on the surface of the medium, and a third rotating seat and a fourth rotating seat protruding on the top side of the second base plate, and the third rotating seat and the fourth rotating seat are rotatably connected to the correspondingly arranged rods, respectively.

10. The folding chair according to any one of claims 1 to 6, characterized in that: The height of the upper end of the backrest rod is higher than the height of the upper end of the front scissors bracket. A positioning piece is provided at the upper end of the backrest rod. The positioning piece includes a mounting portion connected to the backrest rod and a positioning portion arranged at an angle to the mounting portion. The rear portion of the flexible contact piece is sleeved on the positioning piece, and the front portion is sleeved on the upper ends of the third and fourth rods of the front scissors bracket, as well as the front ends of the second rods of the left and right scissors brackets.

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