Folding chair

Abstract

The invention relates to the technical field of folding chairs, and provides a folding chair which can improve the structural stability and operation convenience of the folding chair. The folding chair comprises a chair seat, a supporting leg assembly and a first locking structure, wherein the chair seat is provided with a front connecting structure and a rear connecting structure; the supporting leg assembly comprises a front supporting structure, a rear supporting structure and a connecting piece. Wherein the front supporting structure is rotationally connected with the rear supporting structure, the chair seat is arranged between the front supporting structure and the rear supporting structure, the front connecting structure is rotationally connected with the front supporting structure, the first end of the connecting piece is rotationally connected with the rear connecting structure, and the second end of the connecting piece is rotationally connected with the rear supporting structure; the first locking structure comprises a locking piece and an operating piece, the locking piece is movably arranged on the chair seat, the locking piece is at least provided with a locking position and an unlocking position, and the operating piece is connected with the locking piece; and at the locking position, the locking piece and the connecting piece are in stop fit in the rotating direction of the connecting piece relative to the chair seat, and at the unlocking position, the locking piece and the connecting piece are released from stop fit.

Description

Technical Field

[0001] This application relates to the field of folding chair technology, and more particularly to a folding chair. Background Technology

[0002] Folding chairs are widely used in outdoor activities, temporary settings, and home use due to their ease of storage and portability. Existing folding chairs typically consist of a seat and foldable legs, with the ability to switch between unfolded and folded states achieved through rotating connections between these components. However, current technology still has shortcomings in terms of structural stability and ease of operation. Summary of the Invention

[0003] To address the aforementioned technical problems, this application provides a folding chair that can improve the structural stability and ease of operation of the folding chair.

[0004] This application provides a folding chair, which includes a seat, a leg assembly, and a first locking structure. The seat has a front connecting structure and a rear connecting structure. The leg assembly includes a front support structure, a rear support structure, and a connector. The front support structure and the rear support structure are rotatably connected. The seat is disposed between the front support structure and the rear support structure. The front connecting structure is rotatably connected to the front support structure. The first end of the connector is rotatably connected to the rear connecting structure, and the second end of the connector is rotatably connected to the rear support structure. The first locking structure includes a locking member and an operating member. The locking member is movably disposed on the seat and has at least a locked position and an unlocked position. The operating member is connected to the locking member and is used to drive the locking member to switch between the locked position and the unlocked position. In the locked position, the locking member and the connector form a stop engagement in the rotation direction of the connector relative to the seat. In the unlocked position, the locking member and the connector release the stop engagement.

[0005] The folding chair provided in this application includes a seat, a leg assembly, and a first locking structure. The seat has a front connecting structure and a rear connecting structure. The leg assembly includes a front support structure, a rear support structure, and a connector. The upper side of the front support structure is rotatably connected to the upper side of the rear support structure. The seat is positioned between the front and rear support structures and is rotatably connected to the front support structure via the front connecting structure. The first end of the connector is rotatably connected to the rear connecting structure, and the second end of the connector is rotatably connected to the rear support structure, forming a four-bar linkage mechanism that allows the folding chair to switch between an unfolded and folded state. The first locking structure includes a locking member and an operating member. The locking member is movably disposed on the seat and can be switched between a locked and unlocked position by the operating member. When the folding chair is in the unfolded state, the locking member can move to the locked position. The locking member and the connector form a stop engagement in the rotational direction of the connector relative to the seat, directly restricting the rotational freedom of the connector in the folding direction. Because the locking mechanism applies its stopping force to the connecting member directly along the connecting member's movement path, the force transmission path is short and the structure is highly rigid. This effectively resists dynamic loads generated during use, preventing the seat from sinking or the leg assembly from accidentally folding, thus improving the structural stability and safety of the folding chair in its unfolded state. When the folding chair needs to switch from its unfolded to its folded state, the locking mechanism can move to the unlocked position, releasing its stop engagement with the connecting member and freeing the connecting member's rotational freedom in the folding direction, allowing the folding chair to switch to its folded state easily. Furthermore, the first locking structure fully utilizes existing connecting members as mating components, simplifying the overall structure and reducing manufacturing and assembly costs.

[0006] In some implementations, the first locking structure further includes an elastic reset member disposed between the locking member and the seat, which is used to apply a reset force toward the locking member toward the locked position.

[0007] In some implementations, the chair seat has a positioning part and the locking member has a mating part. In the locked position, the positioning part and the mating part stop and engage along the movement direction of the locking member.

[0008] In some implementations, the chair seat has a first side and a second side arranged opposite to each other. The rear connection structure includes a first connecting part and a second connecting part. The first connecting part is disposed on the first side, and the second connecting part is disposed on the second side. At least two connecting members are provided, each including a first connecting member and a second connecting member. The first connecting part is connected to the rear support structure through the first connecting member, and the second connecting part is connected to the rear support structure through the second connecting member. At least two locking members are provided, each including a first locking member and a second locking member. The first locking member is used to cooperate with the first connecting member stop, and the second locking member is used to cooperate with the second connecting member stop.

[0009] In some implementations, the chair seat has a third side and a fourth side arranged opposite to each other, wherein the third side forms a bearing surface, and the arrangement direction of the third side and the fourth side is perpendicular to the arrangement direction of the first side and the second side; the first locking member and the second locking member are both movably arranged on the fourth side, and the operating member includes a flexible member, the first end of the flexible member is connected to the first locking member, the second end of the flexible member is connected to the second locking member, and at least a portion of the middle section of the flexible member is located on the third side.

[0010] In some implementations, the locking element has a locking surface, which engages with the stop of the connecting element, and the locking surface is adapted to the outer periphery of the connecting element.

[0011] In some implementations, the front support structure includes a first upper support leg and a first lower support leg, and the rear support structure includes a second upper support leg and a second lower support leg; wherein the upper end of the first upper support leg is rotatably connected to the upper end of the second upper support leg, the first lower support leg is detachably connected to the lower end of the first upper support leg, and the second lower support leg is detachably connected to the lower end of the second upper support leg.

[0012] In some implementations, the front support structure further includes a front foot pad, and the lower ends of the first upper support leg and the first lower support leg each have a first mounting portion for detachable installation of the front foot pad; and / or, the rear support structure further includes a rear foot pad, and the lower ends of the second upper support leg and the second lower support leg each have a second mounting portion for detachable installation of the rear foot pad.

[0013] In some implementations, the folding chair also includes a backrest and a second locking structure. The backrest is rotatably connected to the seat, and the second locking structure has a locked state and an unlocked state. In the locked state, the second locking structure locks the backrest so that the backrest is fixed relative to the seat. In the unlocked state, the second locking structure releases the lock on the backrest.

[0014] In some implementations, the folding chair also includes a tray assembly that is detachably mounted on the front support structure. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of the folding chair provided in the embodiment of this application in its unfolded state; Figure 2 This is a schematic diagram of the first locking structure of the folding chair provided in the embodiments of this application; Figure 3 A schematic diagram of the locking member of the first locking structure provided in the embodiments of this application at the locking position; Figure 4 A schematic diagram of the locking element of the first locking structure provided in this application embodiment at the unlocking position; Figure 5 This is a schematic diagram of the backrest structure of a folding chair provided in an embodiment of this application; Figure 6 This is a structural diagram of the folding chair provided in the embodiments of this application during the switching process; Figure 7 This is a schematic diagram of the folding chair in its folded state, as provided in an embodiment of this application. Figure 8 A schematic diagram of the structure of the folding chair provided in the embodiment of this application in a low sitting posture usage mode; Figure 9 This is a schematic diagram of the bottom structure of a folding chair provided in an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures: 1-Seat; 11-Front connecting structure; 12-Rear connecting structure; 121-First connecting part; 122-Second connecting part; 13-Positioning part; 2-Leg assembly; 21-Front support structure; 211-First upper support leg; 212-First lower support leg; 213-Front foot pad; 22-Rear support structure; 221-Second upper support leg; 222-Second lower support leg; 223-Rear foot pad; 23-Connector; 23a-First connector; 23b-Second connector; 3-First locking structure; 31-Locking part; 31a-First locking part; 31b-Second locking part; 311-Locking surface; 312-Mating part; 32-Operating part; 33-Elastic reset part; 4-Backrest; 5-Second locking structure; 51-Snap-fit ​​part; 52-Snap-fit ​​seat; 521-Snap-fit ​​groove; 53-Handle; 6-Dinner tray assembly; 7-Foot pedal. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0022] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0025] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0026] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0027] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0028] The following is a detailed description of this application.

[0029] For ease of description, Figures 1 to 4 Each component is marked with a direction, wherein the first direction is the front-to-back direction of the folding chair, the second direction is the left-to-right direction of the folding chair, and the third direction is the up-to-down direction of the folding chair. The following is a detailed description of this application.

[0030] Folding chairs are widely used in outdoor activities, temporary settings, and home use due to their ease of storage and portability. Existing folding chairs typically consist of a seat and foldable legs, with the ability to switch between unfolded and folded states achieved through rotating connections between these components. However, current technology still has shortcomings in terms of structural stability and ease of operation.

[0031] To solve the above problems, refer to Figure 1 and Figure 2This application provides a folding chair, which includes a seat 1, a leg assembly 2, and a first locking structure 3. The seat 1 has a front connecting structure 11 and a rear connecting structure 12; the leg assembly 2 includes a front support structure 21, a rear support structure 22, and a connector 23; wherein the front support structure 21 and the rear support structure 22 are rotatably connected, the seat 1 is disposed between the front support structure 21 and the rear support structure 22, the front connecting structure 11 is rotatably connected to the front support structure 21, and the first end of the connector 23 is rotatably connected to the rear connecting structure 12. The second end of component 23 is rotatably connected to the rear support structure 22; the first locking structure 3 includes a locking component 31 and an operating component 32. The locking component 31 is movably disposed on the seat 1. The locking component 31 has at least a locked position and an unlocked position. The operating component 32 is connected to the locking component 31 and is used to drive the locking component 31 to switch between the locked position and the unlocked position. In the locked position, the locking component 31 and the connecting component 23 form a stop engagement in the rotation direction of the connecting component 23 relative to the seat 1. In the unlocked position, the locking component 31 and the connecting component 23 release the stop engagement.

[0032] The seat 1 is the main component for users to sit on. Its structure can be set as a plate, frame, or any other structure that can provide a stable load-bearing surface, depending on the design requirements.

[0033] The front connecting structure 11 and the rear connecting structure 12 are arranged along the front-rear direction of the seat 1, and the front connecting structure 11 and the rear connecting structure 12 are respectively rotatably connected to different parts of the support leg assembly 2.

[0034] The leg assembly 2 is connected to the seat 1 to support the seat 1 and enable its folding function. The leg assembly 2 includes a front support structure 21, a rear support structure 22, and a connector 23. The upper side of the front support structure 21 is rotatably connected to the upper side of the rear support structure 22. The seat 1 is positioned between the front support structure 21 and the rear support structure 22 and is rotatably connected to the front support structure 21 via a front connecting structure 11. The first end of the connector 23 is rotatably connected to the rear connecting structure 12, and the second end of the connector 23 is rotatably connected to the rear support structure 22, thus forming a four-bar linkage mechanism. This allows the seat 1 to automatically reach its usable height when the leg assembly 2 is extended and to fold down when the leg assembly 2 is retracted.

[0035] It should be noted that the "front" and "back" of the folding chair are spatial orientation terms defined based on the orientation of the user when sitting normally. Specifically, when the user is sitting on seat 1 facing forward, the side of their body facing forward is the front, and the side of their back facing backward is the back.

[0036] The front connecting structure 11 and the rear connecting structure 12 on the seat 1 can have various structural forms. For example, the front connecting structure 11 and the rear connecting structure 12 can be connecting holes or connecting shafts. This application embodiment does not limit this.

[0037] The connector 23 can be a rigid structural component, such as a connecting rod, connecting beam, or support arm.

[0038] The function of the first locking structure 3 is to ensure that the folding chair does not fold accidentally due to force when unfolded in use. The first locking structure 3 includes a locking member 31 and an operating member 32. The locking member 31 is movably disposed on the seat 1 and has at least two working positions (locked position and unlocked position). The operating member 32 is connected to the locking member 31 and is used by the user to apply operating force to drive the locking member 31 to switch between the locked position and the unlocked position.

[0039] Reference Figure 3 When the locking member 31 is in the locked position, the locking member 31 and the connecting member 23 form a stop engagement in the rotational direction of the connecting member 23 relative to the seat 1. That is, when the seat 1 attempts to rotate the connecting member 23 about its axis of rotation with the rear connecting structure 12 in the folding direction due to external force (such as a person sitting down), the locking member 31 will abut against a specific part of the connecting member 23 (such as a boss, shoulder, or outer contour of the rod), preventing the connecting member 23 from continuing to rotate, thereby locking the entire leg assembly 2 in the unfolded state; see reference. Figure 4 When the user operates the operating component 32 to move the locking component 31 to the unlocked position, the locking component 31 and the connecting component 23 are released from their stop engagement, and the connecting component 23 can rotate freely. The support leg assembly 2 can then be folded inward to achieve folding.

[0040] There are various possibilities for how the locking member 31 is installed on the seat 1. For example, the locking member 31 can be slidably installed on the seat 1 or rotatedly installed on the seat 1. This application embodiment does not limit this.

[0041] In addition, the locking element 31 can have a variety of structural forms. For example, the locking element 31 can be a locking block, a hook, or an elastic pin. This application embodiment does not limit the specific form of the locking element 31.

[0042] The operating component 32 can be selected in different forms depending on the operating method and spatial layout, including but not limited to: flexible pull rope, steel wire rope, push-pull rod, toggle button, rotary handle or lever mechanism, etc.

[0043] The folding chair provided in this embodiment includes a seat 1, a leg assembly 2, and a first locking structure 3. The seat 1 has a front connecting structure 11 and a rear connecting structure 12. The leg assembly 2 includes a front support structure 21, a rear support structure 22, and a connector 23. The upper side of the front support structure 21 is rotatably connected to the upper side of the rear support structure 22. The seat 1 is disposed between the front support structure 21 and the rear support structure 22 and is rotatably connected to the front support structure 21 via the front connecting structure 11. The first end of the connector 23 is rotatably connected to the rear connecting structure 12, and the second end of the connector 23 is rotatably connected to the rear support structure 22, forming a four-bar linkage mechanism, allowing the folding chair to switch between an unfolded and folded state. The first locking structure 3 includes a locking member 31 and an operating member 32. The locking member 31 is movably disposed on the seat 1 and can be switched between a locked position and an unlocked position by the operating member 32. (Refer to...) Figure 1 and Figure 3 When the folding chair is in its unfolded state, the locking member 31 can move to the locked position. The locking member 31 and the connecting member 23 form a stop engagement in the rotational direction of the connecting member 23 relative to the seat 1, directly restricting the rotational freedom of the connecting member 23 in the folding direction. Because the stopping force of the locking member 31 on the connecting member 23 is applied directly along the path of the connecting member 23's movement, the force transmission path is short and the structure is highly rigid, effectively resisting dynamic loads generated during use, preventing the seat 1 from sinking or the leg assembly 2 from accidentally folding, thus improving the structural stability and safety of the folding chair in its unfolded state. (Refer to...) Figure 4 , Figure 6 and Figure 7 When the folding chair needs to switch from its unfolded to its folded state, the locking member 31 can move to the unlocked position, releasing its stop engagement with the connecting member 23 and freeing the connecting member 23 to rotate freely in the folding direction, allowing the folding chair to switch to its folded state. The operation is relatively simple. In addition, the first locking structure 3 makes full use of the existing connecting member 23 as a mating object, which simplifies the overall structure and reduces manufacturing and assembly costs.

[0044] Reference Figure 3 and Figure 4 In one possible embodiment of this application, the first locking structure 3 further includes an elastic reset member 33, which is disposed between the locking member 31 and the seat 1. The elastic reset member 33 is used to apply a reset force toward the locking member 31 towards the locking position.

[0045] In this embodiment, the first locking structure 3 includes an elastic reset member 33, which is disposed between the locking member 31 and the seat 1, and is used to continuously apply a reset force toward the locking position to the locking member 31. Specifically, when the operating member 32 is not actively operated, the elastic reset member 33 pushes or pulls the locking member 31 back to the locking position automatically by the force generated by its elastic deformation; only when the user actively applies force to the operating member 32 to overcome the elastic force will the locking member 31 temporarily move to the unlocked position.

[0046] The elastic reset member 33 can have a variety of structural forms. For example, the elastic reset member 33 can be a spring, a torsion spring, or a spring sheet. This application does not limit the specific form of the embodiment.

[0047] During the unfolding and use of the folding chair, if the locking member 31 becomes temporarily loose due to vibration, impact, or other reasons, the elastic reset member 33 can drive the locking member 31 to automatically return to the locked position, restoring the stop engagement between the locking member 31 and the connecting member 23, thereby avoiding the risk of accidental folding due to locking failure. Furthermore, after the user switches the folding chair from the folded state to the unfolded state, the elastic reset member 33 ensures that the locking member 31 automatically returns to the locked position, eliminating the need for additional manual operation by the user and improving ease of use.

[0048] Of course, in some other embodiments, the first locking structure 3 may not include the elastic reset member 33, but instead achieve stable holding of the locked position through the geometric fit between the locking member 31 and the seat 1. Specifically, the locking member 31 is slidably mounted on the seat 1, and the seat 1 has a locking groove on the movement path of the locking member 31; when the locking member 31 enters the locked position and forms a stop fit with the connecting member 23, the reaction force applied by the connecting member 23 to the locking member 31, combined with the locking groove, fixes the locking member 31 in the locked position, preventing the locking member 31 from disengaging due to vibration or slight external force. Only when the user actively operates the operating member 32 and applies a sufficiently large external force to overcome the geometric constraint can the locking member 31 disengage from the locked position and switch to the unlocked position.

[0049] Reference Figure 3 and Figure 4 In one possible embodiment of this application, the chair seat 1 has a positioning part 13 and the locking member 31 has a mating part 312. In the locked position, the positioning part 13 and the mating part 312 stop and engage along the movement direction of the locking member 31.

[0050] The above-described solution refers to a positioning part 13 on the seat 1 and a mating part 312 on the locking member 31. When the locking member 31 is in the locked position, the positioning part 13 and the mating part 312 form a stop engagement in the moving direction of the locking member 31. Here, the moving direction of the locking member 31 refers to the direction of movement of the locking member 31 from the unlocked position to the locked position. Thus, once the locking member 31 reaches the locked position, the mating part 312 of the locking member 31 is blocked by the positioning part 13 on the seat 1 and cannot continue to move in the moving direction, thereby stably limiting the locking member 31 to the locked position.

[0051] Here, the chair seat 1 is provided with a positioning part 13, and the locking member 31 is provided with a mating part 312. Under the action of the elastic reset member 33, when the locking member 31 moves towards the locking position, the mating part 312 of the locking member 31 contacts and limits the positioning part 13 on the chair seat 1, thereby ensuring that the locking member 31 accurately and stably stops in the locking position, improving the operational accuracy of the first locking structure 3. In addition, a rigid stop contact is formed between the positioning part 13 and the mating part 312, which can effectively resist the reverse force generated by vibration, impact or external disturbance in the locked state, preventing the locking member 31 from accidentally disengaging from the locking position, and enhancing the reliability of the first locking structure 3.

[0052] Reference Figure 1 and Figure 2 In one possible embodiment of this application, the chair seat 1 has a first side and a second side disposed opposite to each other. The rear connecting structure 12 includes a first connecting portion 121 and a second connecting portion 122. The first connecting portion 121 is disposed on the first side, and the second connecting portion 122 is disposed on the second side. At least two connecting members 23 are provided, including a first connecting member 23a and a second connecting member 23b. The first connecting portion 121 is connected to the rear support structure 22 through the first connecting member 23a, and the second connecting portion 122 is connected to the rear support structure 22 through the second connecting member 23b. At least two locking members 31 are provided, including a first locking member 31a and a second locking member 31b. The first locking member 31a is used to stop and cooperate with the first connecting member 23a, and the second locking member 31b is used to stop and cooperate with the second connecting member 23b.

[0053] The above-described scheme refers to a chair seat 1 having a first side and a second side arranged opposite to each other. The rear connecting structure 12 includes a first connecting portion 121 located on the first side and a second connecting portion 122 located on the second side. Correspondingly, at least two connecting members 23 are provided, including a first connecting member 23a and a second connecting member 23b. One end of the first connecting member 23a is rotatably connected to the first connecting portion 121, and the other end of the first connecting member 23a is rotatably connected to the rear support structure 22. One end of the second connecting member 23b is rotatably connected to the second connecting portion 122, and the other end of the second connecting member 23b is rotatably connected to the rear support structure 22, thereby forming a symmetrical linkage support path on both sides of the chair seat 1. At the same time, at least two locking members 31 are also provided, including a first locking member 31a and a second locking member 31b. The first locking member 31a and the second locking member 31b are respectively used to form a stop engagement with the first connecting member 23a and the second connecting member 23b in their respective locking positions.

[0054] Here, by providing independent connectors 23 (first connector 23a and second connector 23b) and locking members 31 (first locking member 31a and second locking member 31b) on opposite sides (first side and second side) of the seat 1, the support and locking effect of the rear of the seat 1 achieves dual-point force and dual-point constraint on opposite sides. In this way, when the user sits on the seat 1, the load can be more evenly distributed to the connectors 23 on both sides, avoiding structural deformation, shaking, or local failure caused by excessive force on one side. In addition, the locking members 31 on both sides independently cooperate with the corresponding connectors 23 to stop, so even if the locking member 31 on one side fails due to an accident, the locking member 31 on the other side can still maintain effective locking, improving the reliability of the folding chair.

[0055] Of course, in some other embodiments, only one of the connector 23 and the locking member 31 may be provided, and this application embodiment does not limit this.

[0056] Reference Figure 1 and Figure 2 In one possible embodiment of this application, the chair seat 1 has a third side and a fourth side arranged opposite to each other, wherein the third side forms a bearing surface, and the arrangement direction of the third side and the fourth side is perpendicular to the arrangement direction of the first side and the second side; the first locking member 31a and the second locking member 31b are both movably disposed on the fourth side, the operating member 32 includes a flexible member, the first end of the flexible member is connected to the first locking member 31a, the second end of the flexible member is connected to the second locking member 31b, and at least a portion of the middle section of the flexible member is located on the third side.

[0057] The above-described scheme refers to a chair seat 1 having two sets of mutually perpendicular lateral definitions: one set consisting of a first side and a second side (along the left-right direction), and the other set consisting of a third side and a fourth side (along the up-down direction). The third side forms a support surface for supporting the user, while the fourth side is located opposite the support surface. The first locking member 31a and the second locking member 31b are both movably disposed on the fourth side, i.e., concentrated in the same area on the non-support side of the chair seat 1. Meanwhile, the operating member 32 includes a flexible member, the first end of which is connected to the first locking member 31a, the second end of which is connected to the second locking member 31b, and the middle section of which at least partially extends to the third side, i.e., passes through the chair seat 1 to reach the support surface area accessible to the user.

[0058] The structure of a flexible component can take many forms; for example, a flexible component can be a rope, a wire cable, or a flexible belt.

[0059] Here, the first locking element 31a and the second locking element 31b are centrally located on the fourth side (non-load-bearing side), which helps to conceal functional components, keep the load-bearing surface clean, and avoid the locking mechanism being exposed, affecting user comfort or causing the risk of bumps. Secondly, by connecting the two locking elements 31 simultaneously through the flexible element, the user only needs to apply an operating force (such as pulling) to the middle section of the flexible element on the third side (load-bearing surface) to simultaneously drive the first locking element 31a and the second locking element 31b, improving the ease of operation. Furthermore, the middle section of the flexible element is located on the third side, making the operating position easily accessible to the user in a natural sitting posture, without the need to bend over or reach under the chair, which is more in line with ergonomic principles. In addition, the design of sharing the flexible element can also reduce the number of parts and assembly complexity of the first locking structure 3.

[0060] Of course, in some other embodiments, at least two operating elements 32 may be provided. The at least two operating elements 32 include a first operating element 32 and a second operating element 32. The first operating element 32 is connected to the first locking element 31a, and the second operating element 32 is connected to the second locking element 31b, so as to independently control the operation of the first locking element 31a and the second locking element 31b respectively.

[0061] Reference Figure 3 and Figure 4 In one possible embodiment of this application, the locking member 31 has a locking surface 311, and the locking member 31 engages with the stop of the connector 23 through the locking surface 311. The locking surface 311 is adapted to the outer peripheral contour of the connector 23.

[0062] The above-described scheme refers to the locking member 31 having a locking surface 311, which is configured to directly contact the outer peripheral contour of the connector 23 in the locked position and form a stop fit. Here, the outer peripheral contour of the connector 23 refers to the external shape of the connector 23 in cross-section (such as a circle, ellipse, polygon, etc.), and the matching of the locking surface 311 with the outer peripheral contour of the connector 23 means that the geometry of the locking surface 311 matches the outer peripheral contour of the connector 23 in the contact area.

[0063] Here, the locking surface 311 of the locking member 31 is adapted to the outer peripheral contour shape of the connecting member 23, so that the locking member 31 and the connecting member 23 can achieve a large contact area when they stop, thereby effectively dispersing contact stress, reducing local wear or stress concentration, and improving the durability of the locking structure. Secondly, the adapted contour makes the locking member 31 less prone to slippage or deflection when subjected to force, enhancing the stability and reliability of the stop engagement.

[0064] Reference Figure 1 In one possible embodiment of this application, the front support structure 21 includes a first upper support leg 211 and a first lower support leg 212, and the rear support structure 22 includes a second upper support leg 221 and a second lower support leg 222; wherein, the upper end of the first upper support leg 211 is rotatably connected to the upper end of the second upper support leg 221, the first lower support leg 212 is detachably connected to the lower end of the first upper support leg 211, and the second lower support leg 222 is detachably connected to the lower end of the second upper support leg 221.

[0065] The above-mentioned scheme refers to the fact that the front support structure 21 is composed of a first upper support leg 211 and a first lower support leg 212, and the rear support structure 22 is composed of a second upper support leg 221 and a second lower support leg 222; wherein, the upper end of the first upper support leg 211 is rotatably connected to the upper end of the second upper support leg 221 to form a hinge point at the top of the support leg assembly 2; and the first lower support leg 212 is detachably connected to the lower end of the first upper support leg 211, and the second lower support leg 222 is detachably connected to the lower end of the second upper support leg 221, so that the first upper support leg 211 and the first lower support leg 212, and the second upper support leg 221 and the second lower support leg 222 can be assembled and separated by plugging, snapping, threading or other quick connection methods.

[0066] Here, the front support structure 21 includes a detachably connected first upper support leg 211 and a first lower support leg 212, and the rear support structure 22 includes a detachably connected second upper support leg 221 and a second lower support leg 222. In use, refer to... Figure 1 By assembling the first upper support leg 211 with the first lower support leg 212, and the second upper support leg 221 with the second lower support leg 222, a higher sitting posture can be achieved; see reference Figure 8When the first lower support leg 212 and the second lower support leg 222 are disassembled, the seat 1 is supported only by the first upper support leg 211 and the second upper support leg 221, which can form a lower sitting posture usage mode, thereby realizing seat height adjustment and improving usage flexibility. In addition, when storing or transporting, the first lower support leg 212 and the second lower support leg 222 can be removed, reducing the overall size of the folding chair and making it easier to carry and store.

[0067] Of course, in some embodiments, the front support structure 21 and the rear support structure 22 may also be an integral structure.

[0068] Reference Figure 8 and Figure 9 In one possible embodiment of this application, the front support structure 21 further includes a front foot pad 213, and the lower ends of the first upper support leg 211 and the first lower support leg 212 each have a first mounting portion for the front foot pad 213 to be detachably installed; and / or, the rear support structure 22 further includes a rear foot pad 223, and the lower ends of the second upper support leg 221 and the second lower support leg 222 each have a second mounting portion for the rear foot pad 223 to be detachably installed.

[0069] The above-mentioned solution refers to the fact that the front support structure 21 further includes a front foot pad 213, and the lower ends of the first upper support leg 211 and the first lower support leg 212 are both provided with a first mounting part, which is configured to detachably mount the front foot pad 213; the rear support structure 22 may further include a rear foot pad 223, and the lower ends of the second upper support leg 221 and the second lower support leg 222 are both provided with a second mounting part for detachably mounting the rear foot pad 223.

[0070] The first mounting part can have various possible structural forms, such as a slot, a threaded hole, or a plug-in hole. In addition, the first mounting part can be integrated into a multi-functional interface, which can be used to detachably connect the first lower support leg 212 to the lower end of the first upper support leg 211, and can also be used to detachably install the front foot pad 213 at this position, so that the first lower support leg 212 and the front foot pad 213 share a mounting point.

[0071] The second mounting part can also adopt a structure such as a slot, threaded hole, or plug hole. At the same time, the second mounting part can also be configured as a multi-functional interface, which can be used to detachably connect the second lower support leg 222 to the lower end of the second upper support leg 221, and can also be used to detachably install the rear foot pad 223 at this position, so that the second lower support leg 222 and the rear foot pad 223 share the same mounting point.

[0072] The front foot pads 213 and the rear foot pads 223 can adopt the same structural design to simplify the types of parts and reduce manufacturing and assembly costs; or they can adopt different structural designs according to the different stress characteristics, grounding angle or usage scenarios of the front and rear support areas. This application does not limit this.

[0073] Here, the upper outriggers (first upper outrigger 211 and second upper outrigger 221) and lower outriggers (first lower outrigger 212 and second lower outrigger 222) may directly contact the ground in different usage modes. Therefore, mounting parts (first mounting part and second mounting part) are provided at the lower end of both to ensure that the foot pads can always be installed at the end of the actual grounded component, regardless of the height configuration. This effectively fulfills their functions of anti-slip, shock absorption, and ground protection, preventing damage or slippage caused by direct friction between the outriggers' metal or hard materials and the ground. Secondly, the foot pads adopt a detachable installation method, which facilitates individual replacement according to wear conditions without replacing the entire outrigger, reducing maintenance costs.

[0074] Reference Figure 5 and Figure 6 In one possible embodiment of this application, the folding chair further includes a backrest 4 and a second locking structure 5. The backrest 4 is rotatably connected to the seat 1. The second locking structure 5 has a locked state and an unlocked state. In the locked state, the second locking structure 5 locks the backrest 4 so that the backrest 4 is fixed relative to the seat 1. In the unlocked state, the second locking structure 5 releases the lock on the backrest 4.

[0075] The above-mentioned solution refers to the folding chair further including a backrest 4 and a second locking structure 5. The backrest 4 and the seat 1 are rotatably connected by a pivot or hinge, so that the backrest 4 can be adjusted or folded relative to the seat 1 within a certain angle range. The second locking structure 5 has a locked state and an unlocked state: in the locked state, the second locking structure 5 fixes the backrest 4 and the seat 1 relative to each other, restricting their rotational freedom and keeping the backrest 4 at a set usage angle; in the unlocked state, the second locking structure 5 releases the constraint on the backrest 4, allowing the backrest 4 to rotate around the connecting shaft, thereby realizing angle adjustment or folding backward.

[0076] Here, the folding chair includes a backrest 4 and a second locking structure 5, which has a locked state and an unlocked state. When in use, the user can first switch the second locking structure 5 to the unlocked state, allowing the backrest 4 to rotate freely, making it easy to adjust the backrest angle according to preference. After adjusting the backrest 4, the user can then switch the second locking structure 5 to the locked state, thus maintaining the backrest 4 at the adjusted angle and preventing it from accidentally falling backward or wobbling during leaning, improving the safety and comfort of the seating support. Furthermore, the backrest 4 is rotatably connected to the seat 1, allowing the backrest 4 to be folded down for storage, reducing the overall size and balancing functionality and portability.

[0077] Reference Figure 5 and Figure 6 In some embodiments, the second locking structure 5 includes a snap-fit ​​member 51, a snap-fit ​​seat 52, and a handle 53. The snap-fit ​​member 51 is movably disposed on the backrest 4, and the snap-fit ​​seat 52 is disposed on the rear support structure 22. The snap-fit ​​seat 52 is provided with a snap-fit ​​groove 521 for snap-fitting with the snap-fit ​​member 51.

[0078] Reference Figure 1 In some embodiments, the second locking structure 5 includes a latching member 51, a latching seat 52, and a handle 53; the latching member 51 is movably disposed on the backrest 4, the latching seat 52 is fixedly disposed on the rear support structure 22, and the latching seat 52 is provided with a latching groove; the handle 53 is connected to the latching member 51 and is used to drive the latching member 51 to move between a locked state in which it is engaged in the latching groove and an unlocked state in which it is disengaged from the latching groove, thereby realizing the locking and unlocking of the backrest 4 relative to the seat 1.

[0079] Reference Figure 1 In one possible embodiment of this application, the folding chair also includes a tray assembly 6, which is detachably mounted on the front support structure 21.

[0080] The above-mentioned solution refers to the folding chair also including a tray assembly 6, which is detachably mounted on the front support structure 21. The tray assembly 6 typically includes a flat tray, which is fixed to the front support structure 21 by snaps, threaded connections, or other quick-release devices, allowing the user to install or remove it as needed.

[0081] Here, the folding chair also includes a tray assembly 6, which provides a convenient platform for users to place books, laptops, drinks, and other items on the chair without adding extra furniture, thus expanding its usage scenarios. The tray assembly 6 is detachably mounted on the front support structure 21, allowing users to choose whether to install it based on their actual needs. For example, it can be easily removed when not in use, reducing space occupation and improving portability; while it can be quickly installed when needed to meet temporary requirements.

[0082] In some embodiments, the plate assembly 6 can also be connected to the front support structure 21 via a movable connection structure, so that the position of the plate assembly 6 relative to the front support structure 21 is adjustable, and the plate can be adjusted in at least one dimension of height, front-to-back distance or tilt angle to adapt to the body shape, sitting posture or usage needs of different users.

[0083] Reference Figure 1 In some embodiments, the outrigger assembly 2 further includes a foot pedal 7, which is fixedly disposed on the front support structure 21.

[0084] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A folding chair, characterized in that, include: A chair seat (1), the chair seat (1) having a front connecting structure (11) and a rear connecting structure (12); The outrigger assembly (2) includes a front support structure (21), a rear support structure (22), and a connector (23); The front support structure (21) is rotatably connected to the rear support structure (22), the seat (1) is disposed between the front support structure (21) and the rear support structure (22), the front connecting structure (11) is rotatably connected to the front support structure (21), the first end of the connector (23) is rotatably connected to the rear connecting structure (12), and the second end of the connector (23) is rotatably connected to the rear support structure (22). A first locking structure (3) includes a locking member (31) and an operating member (32). The locking member (31) is movably disposed on the seat (1). The locking member (31) has at least a locking position and an unlocking position. The operating member (32) is connected to the locking member (31) and is used to drive the locking member (31) to switch between the locking position and the unlocking position. In the locked position, the locking member (31) and the connecting member (23) form a stop engagement in the rotational direction of the connecting member (23) relative to the seat (1). In the unlocked position, the locking member (31) and the connecting member (23) release the stop engagement.

2. The folding chair according to claim 1, characterized in that, The first locking structure (3) further includes an elastic reset member (33), which is disposed between the locking member (31) and the seat (1). The elastic reset member (33) is used to apply a reset force toward the locking member (31) towards the locking position.

3. The folding chair according to claim 2, characterized in that, The seat (1) has a positioning part (13), and the locking member (31) has a mating part (312). In the locked position, the positioning part (13) and the mating part (312) stop and engage in the movement direction of the locking member (31).

4. The folding chair according to claim 1, characterized in that, The chair seat (1) has a first side and a second side arranged opposite to each other. The rear connection structure (12) includes a first connection part (121) and a second connection part (122). The first connection part (121) is disposed on the first side, and the second connection part (122) is disposed on the second side. At least two connectors (23) are provided. The at least two connectors (23) include a first connector (23a) and a second connector (23b). The first connection part (121) is connected to the rear support structure (22) through the first connector (23a), and the second connection part (122) is connected to the rear support structure (22) through the second connector (23b). The locking member (31) is provided in at least two parts, including a first locking member (31a) and a second locking member (31b). The first locking member (31a) is used to stop with the first connecting member (23a), and the second locking member (31b) is used to stop with the second connecting member (23b).

5. The folding chair according to claim 4, characterized in that, The chair seat (1) has a third side and a fourth side arranged opposite to each other, wherein the third side forms a bearing surface, and the arrangement direction of the third side and the fourth side is perpendicular to the arrangement direction of the first side and the second side; The first locking member (31a) and the second locking member (31b) are both movably disposed on the fourth side. The operating member (32) includes a flexible member. The first end of the flexible member is connected to the first locking member (31a), the second end of the flexible member is connected to the second locking member (31b), and at least a portion of the middle section of the flexible member is located on the third side.

6. The folding chair according to claim 1, characterized in that, The locking member (31) has a locking surface (311), and the locking member (31) stops and cooperates with the connector (23) through the locking surface (311). The locking surface (311) is adapted to the outer peripheral contour of the connector (23).

7. The folding chair according to claim 1, characterized in that, The front support structure (21) includes a first upper support leg (211) and a first lower support leg (212), and the rear support structure (22) includes a second upper support leg (221) and a second lower support leg (222). The upper end of the first upper support leg (211) is rotatably connected to the upper end of the second upper support leg (221), the first lower support leg (212) is detachably connected to the lower end of the first upper support leg (211), and the second lower support leg (222) is detachably connected to the lower end of the second upper support leg (221).

8. The folding chair according to claim 7, characterized in that, The front support structure (21) further includes a front foot pad (213), and the lower ends of the first upper support leg (211) and the first lower support leg (212) each have a first mounting portion, which is used for the front foot pad (213) to be detachably installed; and / or, the rear support structure (22) further includes a rear foot pad (223), and the lower ends of the second upper support leg (221) and the second lower support leg (222) each have a second mounting portion, which is used for the rear foot pad (223) to be detachably installed.

9. The folding chair according to any one of claims 1-8, characterized in that, It also includes a backrest (4) and a second locking structure (5), the backrest (4) being rotatably connected to the seat (1), and the second locking structure (5) having a locked state and an unlocked state; In the locked state, the second locking structure (5) locks the backrest (4) so ​​that the backrest (4) is fixed relative to the seat (1); In the unlocked state, the second locking structure (5) releases the lock on the chair back (4).

10. The folding chair according to any one of claims 1-8, characterized in that, It also includes a plate assembly (6), which is detachably mounted on the front support structure (21).

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