Folding chair

Abstract

The application discloses a folding chair, a first leg winch of a first leg part, a second leg winch of a second leg part and a seat plate winch of a seat plate part are sequentially stacked and formed into a hinge; and a main locking mechanism is arranged in a first sliding groove on the second leg winch. The folding chair provided by the application can be unfolded and used when the folding chair enters a use state, the first bolt part and the second bolt part respectively extend into the first gap and the second gap, the main locking mechanism is arranged on the second leg part, the first bolt part restrains the relative rotation between the second leg part and the first leg part and the relative rotation between the second leg part and the seat plate part, and the folding chair can be unfolded and used; the folding chair can be folded and stored when the folding chair enters a storage state, the first elastic member pushes the first sliding block to slide, the first bolt part and the second bolt part are respectively out of the first gap and the second gap, at this time, the first leg part, the second leg part and the seat plate part are free to rotate, and the folding chair can be folded and stored; and the whole structure is simple, the operation is simple, and the stability is high.

Description

Technical Field

[0001] This utility model relates to the field of chair structure, and in particular to a folding chair. Background Technology

[0002] In existing technology, folding chairs can be easily unfolded for use and compactly folded for storage when not in use. This design is widely used in various types of chairs (such as dining chairs and camping chairs), with the main goal of saving storage and transportation space while significantly improving the product's portability and flexibility of use. This structure typically utilizes hinges, linkage mechanisms, or other mechanical principles to ensure a stable connection between the various components of the folding chair and to provide stable support when unfolded. During the design phase, the strength, durability, and ease of operation of the structure must be comprehensively considered to ensure that users enjoy both a convenient operating experience and safety during use.

[0003] Folding chairs come in a wide variety of designs, each continuously striving to maximize space utilization and optimize ease of use. Through ongoing research and innovation, designers aim to further simplify the folding and unfolding process, reducing the required effort, while ensuring structural stability and durability. This allows users to use folding chairs more easily and efficiently. Continuous optimization of space utilization and ease of use remains the core direction of folding structure development, aiming to provide users with more efficient and convenient solutions. Utility Model Content

[0004] The main purpose of this utility model is to provide a folding chair that addresses the problem of how to improve the structure of a folding chair to make it easier to use.

[0005] To achieve the above objectives, this utility model provides a folding chair, comprising: Two first legs, each first leg including a first leg and a first leg winch connected to the top of the first leg, the first leg winch having a first notch; Two second legs, each second leg including a second leg and a second leg winch connected to the top of the second leg, the second leg winch being provided with a first groove; The seat section includes a seat and seat winches disposed at both ends of the rear end of the seat in the width direction. The seat winches are provided with a second notch. The first leg winch, the second leg winch and the seat winch are stacked sequentially and form a hinge. The main locking mechanism includes a first slider and a first elastic member. The first slider is slidably disposed in the first slide groove and partially exposed in the second leg. The first elastic member is installed in the first slide groove and abuts against the first slider. The first slider is provided with a first bolt and a second bolt corresponding to the first leg winch and the seat winch, respectively. When the folding chair is in use, the first bolt and the second bolt extend into the first notch and the second notch respectively; when the folding chair is in storage, the first slider is pushed to slide against the first elastic member, and the first bolt and the second bolt disengage from the first notch and the second notch respectively. At this time, the first leg, the second leg and the seat can rotate freely.

[0006] Furthermore, the second leg winch is provided with a fourth notch, and the seat winch is provided with a fifth notch. When the folding chair is in the stowed state, the first bolt and the second bolt extend into the fourth notch and the fifth notch, respectively.

[0007] Furthermore, the folding chair also includes a backrest and a backrest locking mechanism; the backrest includes a backrest and backrest winches disposed at both ends of the lower end of the backrest in the width direction, the two backrest winches are respectively hinged to the two seat winches, the backrest winches are provided with a second sliding groove, and the seat winches are provided with a third notch. The backrest locking mechanism includes a second slider and a second elastic member. The second slider is slidably disposed in the second slide groove and partially exposed in the backrest winch. The second elastic member is installed in the second slide groove and abuts against the second slider. When the folding chair is in use, the second slider extends into the third notch; when the folding chair is in storage, the second slider is pushed to slide against the second elastic element, and the second slider disengages from the third notch, at which point the backrest can rotate freely.

[0008] Furthermore, the backrest winch is provided with a sixth notch, and the seat winch is provided with a seventh notch. When the folding chair is in the stowed state, the second slider extends into the sixth and seventh notches.

[0009] Furthermore, the first leg winch, the second leg winch, the seat winch, and the backrest winch are hinged together by a bolt assembly.

[0010] Furthermore, an armrest is hinged to the backrest, and a support plate is hinged to the end of the armrest away from the backrest. A fixing groove is provided on the seat corresponding to the free end of the support plate.

[0011] Furthermore, the hinge angle between the first leg winch and the second leg winch is limited, and the hinge angle between the seat winch and the second leg winch is limited. In the use state and the storage state of the folding chair, the first leg winch and the second leg winch, as well as the seat winch and the second leg winch, form a contact restriction in the circumferential direction.

[0012] Furthermore, the hinge angle between the first leg winch and the second leg winch is limited by an abutment restriction, and the hinge angle between the seat winch and the second leg winch is limited by an abutment restriction.

[0013] Furthermore, the first bolt and the second bolt are either a connecting structure or an integral structure.

[0014] Furthermore, the bottom ends of the two first legs are connected; the bottom ends of the two second legs are connected.

[0015] The folding chair provided by this utility model has a first leg winch, a second leg winch, and a seat winch stacked sequentially and hinged together. The main locking mechanism is disposed in a first groove on the second leg winch. A first slider is provided with a first bolt and a second bolt corresponding to the first leg winch and the seat winch, respectively. When the folding chair is in use, the first bolt and the second bolt extend into the first notch and the second notch, respectively. The main locking mechanism is installed on the second leg. The first bolt suppresses the relative rotation between the second leg and the first leg, as well as the relative rotation between the second leg and the seat, allowing the folding chair to be unfolded and used. When the folding chair is in the storage state, the first elastic element pushes the first slider to slide, and the first bolt and the second bolt disengage from the first notch and the second notch, respectively. At this time, the first leg, the second leg, and the seat can rotate freely, and the folding chair can be folded and stored. The overall structure is simple, the operation is simple, and the stability is strong. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the folding chair in use according to the first embodiment of this utility model; Figure 2 This is a schematic diagram of the two first legs of the folding chair in the first embodiment of this utility model; Figure 3 This is a schematic diagram (inner view) of the two second legs in the folding chair of the first embodiment of this utility model. Figure 4 This is a schematic diagram (outer view) of the two second legs in the folding chair of the first embodiment of this utility model. Figure 5 This is a schematic diagram of the seat section of the folding chair according to the first embodiment of this utility model; Figure 6 This is a schematic diagram of the backrest of the folding chair in the first embodiment of this utility model; Figure 7 This is a schematic diagram of the folding chair in its stored state according to the first embodiment of this utility model; Figure 8 This is a first partial sectional view of the folding chair according to the first embodiment of this utility model; Figure 9 yes Figure 8 A partial magnification; Figure 10 This is a second partial sectional view of the folding chair according to the first embodiment of this utility model; Figure 11 yes Figure 10 A magnified view of a local area.

[0017] Reference numerals: 100-First leg, 110-First leg, 120-First leg winch, 121-First notch, 200-Second leg, 210-Second leg, 220-Second leg winch, 221-First slide groove, 300-Seat plate, 310-Seat plate, 320-Seat plate winch, 321-Second notch, 322-Third notch, 410-First slider, 411-First bolt, 412-Second bolt, 420-First elastic element, 500-Backrest, 510-Backrest, 520-Backrest winch, 521-Second slide groove, 610-Second slider, 620-Second elastic element, 700-Armrest plate, 800-Support plate. Detailed Implementation

[0018] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0020] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0021] Reference Figures 1 to 11In one embodiment of this utility model, a folding chair includes: Two first legs 100, each first leg 100 including a first leg 110 and a first leg winch 120 connected to the top of the first leg 110, the first leg winch 120 being provided with a first notch 121; Two second legs 200, each second leg 200 includes a second leg 210 and a second leg winch 220 connected to the top of the second leg 210, and the second leg winch 220 is provided with a first groove 221; The seat plate portion 300 includes a seat plate 310 and seat plate winches 320 disposed at both ends of the rear end of the seat plate 310 in the width direction. The seat plate winches 320 are provided with a second notch 321. The first leg winch 120, the second leg winch 220 and the seat plate winch 320 are stacked sequentially and form a hinge. The main locking mechanism includes a first slider 410 and a first elastic member 420. The first slider 410 is slidably disposed in the first slide groove 221 and partially exposed in the second leg 200. The first elastic member 420 is installed in the first slide groove 221 and abuts against the first slider 410. The first slider 410 is provided with a first bolt 411 and a second bolt 412 corresponding to the first leg winch 120 and the seat winch 320, respectively. When the folding chair is in use, the first bolt 411 and the second bolt 412 extend into the first notch 121 and the second notch 321, respectively. When the folding chair is in storage, the first slider 410 is pushed to slide against the first elastic member 420, and the first bolt 411 and the second bolt 412 disengage from the first notch 121 and the second notch 321, respectively. At this time, the first leg 100, the second leg 200 and the seat 300 can rotate freely.

[0022] In existing technologies, continuous optimization of space utilization and ease of operation has always been the core direction of folding structure research and development, aiming to provide users with more efficient and convenient usage solutions.

[0023] The folding chair provided by this utility model includes two first legs 100, two second legs 200, a seat 300, and a main locking mechanism.

[0024] Two first legs 100 can form a support. Each first leg 100 includes a first leg 110 and a first leg winch 120 connected to the top of the first leg 110. The first leg 110 and the first leg winch 120 can be a connected structure or an integrally formed structure. The first leg winch 120 has a first notch 121. When the first leg winch 120 rotates, the first notch 121 rotates around the center of the first leg winch 120.

[0025] Two second legs 200 can form a support. Each second leg 200 includes a second leg 210 and a second leg winch 220 connected to the top of the second leg 210. The second leg 210 and the second leg winch 220 can be a connecting structure or an integrally formed structure. The second leg winch 220 is provided with a first groove 221.

[0026] The seat section 300 includes a seat 310 and seat winches 320 disposed at both ends of the rear end of the seat 310 in the width direction. A second notch 321 is provided on the seat winch 320. The first leg winch 120, the second leg winch 220, and the seat winch 320 are stacked sequentially and hinged together. The first leg winch 120, the second leg winch 220, and the seat winch 320 can be hinged together as a whole using a single bolt, but independent hinge structures can also be formed between the first leg winch 120 and the second leg winch 220, and between the second leg winch 220 and the seat winch 320.

[0027] The main locking mechanism includes a first slider 410 and a first elastic element 420. The first elastic element 420 is preferably a coil spring, but in other embodiments it can be other types of elastic functional elements. The first slider 410 is slidably disposed in the first slide groove 221 and partially exposed in the second leg 200, so that the sliding of the first slider 410 can be operated externally. The first elastic element 420 is mounted in the first slide groove 221 and abuts against the first slider 410, providing a restoring force for the first slider 410. The first slider 410 is provided with a first bolt 411 and a second bolt 412 corresponding to the first leg winch 120 and the seat winch 320, respectively. Since the first leg winch 120 and the seat winch 320 are located on both sides of the second leg winch 220, under normal circumstances, the first bolt 411 and the second bolt 412 are connected structures (e.g., a plug shaft is provided, which passes through the second leg winch 220 and connects the first bolt 411 and the second bolt 412); by setting a hollow structure for the second leg winch, the first bolt 411 and the second bolt 412 can be an integral structure.

[0028] When the folding chair is in use, the first bolt 411 and the second bolt 412 extend into the first notch 121 and the second notch 321 respectively. The main locking mechanism is installed on the second leg 200. The first bolt 411 suppresses the relative rotation between the second leg 200 and the first leg 100 and the relative rotation between the second leg 200 and the seat 300, so that the folding chair can be unfolded and used.

[0029] When the folding chair is in the storage state, the first elastic element 420 pushes the first slider 410 to slide, and the first bolt 411 and the second bolt 412 disengage from the first notch 121 and the second notch 321 respectively. At this time, the first leg 100, the second leg 200 and the seat 300 can rotate freely, and the folding chair can be folded and stored.

[0030] In summary, the first leg winch 120 of the first leg 100, the second leg winch 220 of the second leg 200, and the seat winch 320 of the seat plate 300 are stacked sequentially and form a hinge; the main locking mechanism is provided in the first groove 221 on the second leg winch 220. The first slider 410 is provided with a first bolt 411 and a second bolt 412 corresponding to the first leg winch 120 and the seat winch 320, respectively. When the folding chair is in use, the first bolt 411 and the second bolt 412 extend into the first notch 121 and the second notch 321, respectively. The main locking mechanism is installed on the second leg 200. The first bolt 411 suppresses the relative rotation between the second leg 200 and the first leg 100 and the relative rotation between the second leg 200 and the seat 300, so the folding chair can be unfolded and used. When the folding chair is in storage, the first slider 410 is pushed to slide against the first elastic element 420, and the first bolt 411 and the second bolt 412 disengage from the first notch 121 and the second notch 321, respectively. At this time, the first leg 100, the second leg 200 and the seat 300 can rotate freely, and the folding chair can be folded and stored. The overall structure is simple, the operation is simple, and the stability is strong.

[0031] In one embodiment, the second leg winch 220 is provided with a fourth notch, and the seat winch 320 is provided with a fifth notch. When the folding chair is in the stowed state, the first bolt 411 and the second bolt 412 extend into the fourth notch and the fifth notch, respectively.

[0032] In this embodiment, by setting the fourth notch on the second leg winch 220 and the fifth notch on the seat winch 320, the backrest winch 520 and the second leg 200 are not allowed to rotate freely when the folding chair is in the folded state, thereby improving the stability in the folded state.

[0033] Reference Figures 8 to 11 In one embodiment, the folding chair further includes a backrest 500 and a backrest locking mechanism; the backrest 500 includes a backrest 510 and backrest winches 520 disposed at both ends of the lower end of the backrest 510 in the width direction, the two backrest winches 520 are respectively hinged to the two seat winches 320, the backrest winches 520 are provided with a second sliding groove 521, and the seat winches 320 are provided with a third notch 322; The backrest locking mechanism includes a second slider 610 and a second elastic member 620. The second slider 610 is slidably disposed in the second slide groove 521 and partially exposed in the backrest winch 520. The second elastic member 620 is installed in the second slide groove 521 and abuts against the second slider 610. When the folding chair is in use, the second slider 610 extends into the third notch 322; when the folding chair is in storage, the second elastic element 620 pushes the second slider 610 to slide, and the second slider 610 disengages from the third notch 322, at which time the backrest 500 can rotate freely.

[0034] In this embodiment, a backrest 500 is added, and a backrest locking mechanism is provided corresponding to the backrest 500. Similar to the operation of the aforementioned main locking mechanism, the relative rotation between the backrest 500 and the seat 300 is locked and released by operating the second slider 610 of the backrest locking mechanism.

[0035] In one embodiment, the backrest winch 520 is provided with a sixth notch, and the seat winch 320 is provided with a seventh notch. When the folding chair is in the stowed state, the second slider 610 extends into the sixth notch and the seventh notch.

[0036] In this embodiment, by setting the sixth notch on the backrest winch 520 and the seventh notch on the seat winch 320, the rotation between the backrest winch 520 and the seat winch 320 is not free when the folding chair is in the storage state, thereby improving the stability in the storage state.

[0037] In one embodiment, the first leg winch 120, the second leg winch 220, the seat winch 320, and the backrest winch 520 are hinged by a bolt assembly.

[0038] In this embodiment, a hinged connection is formed by sequentially passing bolt assemblies through the first leg winch 120, the second leg winch 220, the seat winch 320, and the backrest winch 520. Hinged structures may also be formed at adjacent positions of the first leg winch 120, the second leg winch 220, the seat winch 320, and the backrest winch 520. For example, a hinged connection can be formed separately between the first leg winch 120 and the second leg winch 220 by sleeve connection.

[0039] Reference Figures 1 to 9 In one embodiment, an armrest 700 is hinged to the backrest 500, and a support plate 800 is hinged to the end of the armrest 700 away from the backrest 500. A fixing groove is provided on the seat 300 corresponding to the free end of the support plate 800.

[0040] In this embodiment, the addition of an armrest 700 enhances ease of use, and the armrest 700 is fixed by its lower end engaging with a fixing groove in the seat portion 300. During use, the armrest 700 is supported on the seat portion 300 by a support plate 800; when storing, the engagement between the support plate 800 and the fixing groove can be disengaged for rotation and storage, reducing space occupation.

[0041] In one embodiment, the hinge angle between the first leg winch 120 and the second leg winch 220 is limited, and the hinge angle between the seat winch 320 and the second leg winch 220 is limited. In the folding chair in the use state and the storage state, the first leg winch 120 and the second leg winch 220, as well as the seat winch 320 and the second leg winch 220, form a circumferential contact restriction.

[0042] In this embodiment, the hinge between the seat winch 320 and the second leg winch 220 provides a rotational degree of freedom of 70 to 150 degrees. The hinge between the first leg winch 120 and the second leg winch 220 provides a rotational degree of freedom of 70 to 120 degrees. Therefore, when the folding chair switches states, the aforementioned hinge angle limit guides the engagement and disengagement of each mechanism (the engagement and disengagement of the first slider 410 with the first notch 121 and the second notch 321). In a typical implementation, arc-shaped fixing plates protrude from both ends of the second leg winch 220 in the thickness direction. Arc-shaped fixing grooves are respectively provided on the corresponding arc-shaped fixing plates of the first leg winch 120 and the seat winch 320. During the rotation of the first leg winch 120 and the seat winch 320, the fixing plates rotate within the fixing grooves. The hinge between the first leg winch 120 and the second leg winch 220 forms a set angle of rotational freedom through the circumferential extension of the fixed groove, and the hinge between the seat winch 320 and the second leg winch 220 forms a set angle of rotational freedom.

[0043] In one embodiment, the hinge angle between the first leg winch 120 and the second leg winch 220 is limited by an abutment restriction, and the hinge angle between the seat winch 320 and the second leg winch 220 is limited by an abutment restriction.

[0044] In this embodiment, arc-shaped fixing plates protrude from both ends of the second leg winch 220 in the thickness direction. Arc-shaped fixing grooves are respectively provided on the corresponding arc-shaped fixing plates of the first leg winch 120 and the seat winch 320. During the rotation of the first leg winch 120 and the seat winch 320, the fixing plates rotate within the fixing grooves. The fixing grooves extend angularly in the circumferential direction, and the hinge between the first leg winch 120 and the second leg winch 220 forms a set degree of rotational freedom. The hinge between the seat winch 320 and the second leg winch 220 also forms a set degree of rotational freedom.

[0045] In one embodiment, the first bolt portion 411 and the second bolt portion 412 are a connecting structure or an integral structure.

[0046] In this embodiment, two configurations of the first bolt 411 and the second bolt 412 are provided. When the first bolt 411 and the second bolt 412 are integrally formed, the complexity of the structure and the difficulty of processing can be reduced. When the first bolt 411 and the second bolt 412 are connected, a more complex structural design can be carried out. The connection method between the first bolt 411 and the second bolt 412 can be plug-in or the like.

[0047] In one embodiment, the bottom ends of the two first legs 110 are connected; the bottom ends of the two second legs 210 are connected.

[0048] In this embodiment, connecting the two first legs 110 improves the stability of the first leg 100, and connecting the two second legs 210 improves the stability of the second leg 200. Taking the first leg 100 as an example, its processing method can be integral molding or joint molding. For example, the first leg 110 is the front leg, and the second leg 210 is the rear leg.

[0049] In summary, the folding chair provided by this utility model has a first leg winch 120 of the first leg portion 100, a second leg winch 220 of the second leg portion 200, and a seat winch 320 of the seat portion 300 stacked sequentially and forming a hinge; the main locking mechanism is provided in the first sliding groove 221 on the second leg winch 220. The first slider 410 is provided with a first bolt 411 and a second bolt 412 corresponding to the first leg winch 120 and the seat winch 320, respectively. When the folding chair is in use, the first bolt 411 and the second bolt 412 extend into the first notch 121 and the second notch 321, respectively. The main locking mechanism is installed on the second leg 200. The first bolt 411 suppresses the relative rotation between the second leg 200 and the first leg 100 and the relative rotation between the second leg 200 and the seat 300, so the folding chair can be unfolded and used. When the folding chair is in storage, the first slider 410 is pushed to slide against the first elastic element 420, and the first bolt 411 and the second bolt 412 disengage from the first notch 121 and the second notch 321, respectively. At this time, the first leg 100, the second leg 200 and the seat 300 can rotate freely, and the folding chair can be folded and stored. The overall structure is simple, the operation is simple, and the stability is strong.

[0050] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A folding chair, characterized in that, include: Two first legs (100), each first leg (100) includes a first leg (110) and a first leg winch (120) connected to the top of the first leg (110), the first leg winch (120) having a first notch (121). Two second legs (200), each second leg (200) includes a second leg (210) and a second leg winch (220) connected to the top of the second leg (210), the second leg winch (220) being provided with a first groove (221); The seat section (300) includes a seat (310) and seat winches (320) disposed at both ends of the rear width direction of the seat (310). The seat winches (320) are provided with a second notch (321). The first leg winch (120), the second leg winch (220) and the seat winch (320) are stacked sequentially and form a hinge. The main locking mechanism includes a first slider (410) and a first elastic member (420). The first slider (410) is slidably disposed in the first slide groove (221) and partially exposed in the second leg (200). The first elastic member (420) is installed in the first slide groove (221) and abuts against the first slider (410). The first slider (410) is provided with a first bolt (411) and a second bolt (412) corresponding to the first leg winch (120) and the seat winch (320), respectively. When the folding chair is in use, the first bolt (411) and the second bolt (412) extend into the first notch (121) and the second notch (321) respectively; when the folding chair is in storage, it pushes the first slider (410) to slide against the first elastic element (420), and the first bolt (411) and the second bolt (412) disengage from the first notch (121) and the second notch (321) respectively. At this time, the first leg (100), the second leg (200) and the seat (300) can rotate freely.

2. The folding chair according to claim 1, characterized in that, The second leg winch (220) is provided with a fourth notch, and the seat winch (320) is provided with a fifth notch. When the folding chair is in the storage state, the first bolt (411) and the second bolt (412) extend into the fourth notch and the fifth notch, respectively.

3. The folding chair according to claim 1, characterized in that, The folding chair also includes a backrest (500) and a backrest locking mechanism; the backrest (500) includes a backrest (510) and backrest winches (520) disposed at both ends of the width direction of the lower end of the backrest (510), the two backrest winches (520) are respectively hinged to the two seat winches (320), the backrest winches (520) are provided with a second sliding groove (521), and the seat winches (320) are provided with a third notch (322). The backrest locking mechanism includes a second slider (610) and a second elastic member (620). The second slider (610) is slidably disposed in the second slide groove (521) and partially exposed in the backrest winch (520). The second elastic member (620) is installed in the second slide groove (521) and abuts against the second slider (610). When the folding chair is in use, the second slider (610) extends into the third notch (322); when the folding chair is in storage, the second elastic element (620) pushes the second slider (610) to slide, and the second slider (610) disengages from the third notch (322), at which time the backrest (500) can rotate freely.

4. The folding chair according to claim 3, characterized in that, The backrest winch (520) has a sixth notch, and the seat winch (320) has a seventh notch. When the folding chair is in the stowed state, the second slider (610) extends into the sixth and seventh notches.

5. The folding chair according to claim 3, characterized in that, The first leg winch (120), the second leg winch (220), the seat winch (320), and the backrest winch (520) are hinged by a bolt assembly.

6. The folding chair according to claim 3, characterized in that, An armrest board (700) is hinged to the backrest (500), and a support plate (800) is hinged to the end of the armrest board (700) away from the backrest (500). A fixing groove is provided on the seat part (300) corresponding to the free end of the support plate (800).

7. The folding chair according to claim 1, characterized in that, The hinge angle between the first leg winch (120) and the second leg winch (220) is limited, and the hinge angle between the seat winch (320) and the second leg winch (220) is limited. In the use state and the storage state of the folding chair, the first leg winch (120) and the second leg winch (220) and the seat winch (320) and the second leg winch (220) form a circumferential contact restriction.

8. The folding chair according to claim 7, characterized in that, The hinge angle between the first leg winch (120) and the second leg winch (220) is limited by an abutment restriction, and the hinge angle between the seat winch (320) and the second leg winch (220) is limited by an abutment restriction.

9. The folding chair according to any one of claims 1 to 8, characterized in that, The first bolt (411) and the second bolt (412) are either a connecting structure or an integral structure.

10. The folding chair according to any one of claims 1 to 8, characterized in that, The bottom ends of the two first legs (110) are connected; the bottom ends of the two second legs (210) are connected.

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