Folding chair support

Abstract

The invention discloses a folding chair bracket. The folding chair bracket comprises a supporting seat and a folding chair, the first supporting pieces are rotationally connected with the upper part of the supporting seat; the second supporting pieces are rotationally connected with the lower part of the supporting seat; the adjusting assembly is connected with the supporting seat; wherein the multiple first supporting pieces are all connected with the adjusting assembly, the multiple first supporting pieces are connected with one another through the adjusting assembly, and therefore the unfolding angles of the multiple first supporting pieces relative to the supporting base are adjusted through the adjusting assembly. The adjusting assembly enables the multiple first supporting pieces to be correlated, in the angle adjusting process, the synergistic effect between the first supporting pieces can be guaranteed, the angle between the first supporting pieces and the supporting base can be adjusted more conveniently, higher stability is achieved, and the problems of loosening, posture deformation and the like are not prone to occurring.

Description

Technical Field

[0001] The present application relates to the technical field of outdoor products, and in particular to a folding chair bracket. Background Art

[0002] In daily life and outdoor activities, folding chairs are popular among people due to their portability and easy storage. However, the traditional folding chair bracket has many shortcomings in structural design, which has become a key factor affecting user experience.

[0003] In existing folding chair stands, the upper support parts for assembling seat cushions are often independent of each other and lack an effective coordinated adjustment mechanism. When users adjust the angle of the chair back, they need to operate each support part separately, which is a cumbersome, time-consuming and labor-intensive process, and it is difficult to quickly adjust the chair to a comfortable state. For example, the related art discloses a CN222194551U folding chair frame and a folding chair, which realize the synchronous expansion function of the legs and arms by setting a stop part and abutting part, that is, the opening and closing relationship between the upper support part and the lower support part is linked, and the static support stability is improved by using rigid limit.

[0004] However, this technical solution still has the following limitations: the adjustment function is single, the chair back and seat support adopt a fixed angle design, and it is impossible to achieve multi-level linkage adjustment according to different usage scenarios (such as office, leisure, lying), and the user needs to manually adjust the angle of each arm, which is inefficient. At the same time, the dynamic stability of the support is insufficient. When the user tilts or changes his sitting posture frequently, there is a lack of mechanical linkage compensation mechanism between the arms, resulting in stress concentration at the local fulcrum, which can easily cause the bracket to shake or even collapse.

[0005] The above defects show that the existing folding chair stands are still difficult to meet the core needs of users for rapid adaptation to multiple scenarios, high dynamic stability and long service life. Therefore, developing a folding chair stand that can achieve coordinated adjustment of support parts, enhance stability and be durable has become an urgent problem to be solved. Summary of the invention

[0006] The purpose of the present application is to provide a folding chair bracket to solve the problem that various parts of the folding chair bracket lack an effective coordination mechanism.

[0007] To achieve the above objectives, the technical solution adopted in the present application is: to provide a folding chair bracket, comprising: a support seat; a plurality of first support members, the first support members being rotatably connected to the upper portion of the support seat; a plurality of second support members, the second support members being rotatably connected to the lower portion of the support seat; an adjustment component, the adjustment component being connected to the support seat and linking a plurality of the first support members, so that the angle adjustment of at least one of the first support members synchronously drives the angle change of the remaining first support members through the adjustment component.

[0008] Wherein, the adjustment component includes: a linkage component, which is connected to multiple first support members, and the position of the linkage component is adjusted to achieve angle adjustment of at least one of the first support members, thereby synchronously driving the angle changes of the remaining first support members.

[0009] The linkage component includes: a slide rail, a slider and a connecting rod. The slide rail is arranged on the side of the support seat. One end of the slider is rotatably connected to the first support member, and the other end is embedded in the slide rail. The two adjacent first support members are interconnected through the retractable connecting rod. The slider slides to adjust the expansion angle of the first support member relative to the support seat, and then the expansion angle of the remaining first support members linked by the connecting rod relative to the support seat is linked to adjust.

[0010] Preferably, the linkage component includes: an adjusting rod, which is used to contact and abut against multiple first support members, and is moved by the adjusting rod to adjust the expansion angle of at least one of the first support members relative to the support seat, so as to linkage adjust the expansion angle of the remaining first support members relative to the support seat.

[0011] As another preferred embodiment, the adjustment rod includes: a first sliding rod and a second sliding rod, the first sliding rod and the second sliding rod are cross-arranged, and the first sliding rod and the second sliding rod can move relative to each other based on the intersection point, and multiple first support members are correspondingly abutted against the two ends of the first sliding rod and the second sliding rod; wherein, by adjusting the expansion angle of at least one of the first support members relative to the support seat, the movement and adjustment of the first sliding rod and the second sliding rod are driven, and through the movement of the first sliding rod and the second sliding rod, the expansion angles of the remaining first support members relative to the support seat are linked and adjusted.

[0012] Further preferably, the adjustment assembly further comprises: a wrench linkage block, the wrench linkage block is provided with an assembly groove, the adjustment rod is placed in the assembly groove to limit the movable stroke of the adjustment rod.

[0013] Preferably, the adjustment assembly also includes: a shell, the shell is covered on the outside of the adjustment rod, the shell is used to be connected to the support seat, and the shell is provided with a protruding cavity corresponding to the extension direction of the adjustment rod, and the protruding cavity guides and limits the moving direction of the adjustment rod.

[0014] Further preferably, the adjusting rod assembly also includes: a base, one end of the base is axially connected to the support seat, and the other end of the base is connected to the adjusting rod and the wrench linkage block; wherein the wrench linkage block and the adjusting rod can move relative to the base, and the moving directions are consistent, and the base cooperates with the shell to further limit the movable range of the adjusting rod.

[0015] Further preferably, the base is provided with a protruding rod, and the extension direction of the protruding rod is consistent with the extension direction of the wrench linkage block; correspondingly, a movable wrench piece is provided at the end of the wrench linkage block, and the wrench piece is used to be fixedly matched with the protruding rod; wherein, the wrench linkage block moves with the movement of the adjusting rod, and then the wrench linkage block moves relative to the protruding rod, so that the wrench piece forms a multi-gear cooperation with different position distances relative to the protruding rod, so as to realize the fixation of the adjusting rod at different positions relative to the support seat.

[0016] Furthermore, a limit member is provided on the first slide bar and the second slide bar, and the first slide bar and the second slide bar are linked to move by changing the angle between at least one of the first support members relative to the support seat. The limit member is used to limit the moving stroke of the first slide bar and the second slide bar to limit the angle change range of the first support member.

[0017] Further preferably, the limit member includes a first limit member, a second limit member, a third limit member and a fourth limit member, wherein the first slide bar is provided with a staggered first limit member and a second limit member on both sides of the intersection; the second slide bar is provided with a staggered third limit member and a fourth limit member on both sides of the intersection, the first limit member and the third limit member are arranged opposite to each other, and the second limit member and the fourth limit member are arranged opposite to each other; wherein when the first slide bar and the second slide bar move along the first direction, the first limit member and the third limit member approach each other, and the corresponding second limit member and the fourth limit member move away from each other. Similarly, when the first slide bar and the second slide bar move along the second direction, the first limit member and the third limit member move away from each other, and the corresponding second limit member and the fourth limit member approach each other, so as to fix the position of the first slide bar relative to the second slide bar, and the first direction is opposite to the second direction.

[0018] Further preferably, both ends of the first sliding rod and the second sliding rod are provided with chamfered surfaces, and the chamfered surfaces are used to correspondingly fit against the plurality of first supporting members.

[0019] Furthermore, the present application document also provides a folding chair, comprising: a folding chair bracket as described in any one of the above items; and a seat cushion, wherein the folding chair bracket is detachably connected to the seat cushion, and the seat cushion can be adjusted to various position states through the folding chair bracket.

[0020] Compared with the prior art, the beneficial effects of this application are:

[0021] The adjustment component can conveniently adjust the unfolding angles of the multiple first support members relative to the support seat, and the user can adjust the folding chair to a suitable tilt angle according to their own needs and usage scenarios to obtain a more comfortable sitting or lying position. At the same time, the adjustment component makes the multiple first support members mutually related, and in the process of adjusting the angle, the synergy between the first support members can be ensured, making the angle adjustment between the first support members relative to the support seat more convenient, and having higher stability, and not prone to problems such as looseness and posture deformation.

[0022] The folding chair stand in this application document achieves the unity of convenient storage, precise adjustment and safe use through innovative linkage adjustment mechanism and modular structure design. Its self-locking gear, synchronous angle adjustment and mechanical optimization design significantly improve product reliability and user experience. It is suitable for outdoor or home scenes that require frequent posture switching and has broad market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a folding chair bracket;

[0024] Figure 2 It is a schematic diagram of the structure of adjusting the position of the components in the folding chair bracket;

[0025] Figure 3 A cross-sectional view for adjusting the position of components;

[0026] Figure 4 It is a schematic diagram of the structure in which the housing is removed from the regulating assembly;

[0027] Figure 5 It is a schematic diagram of the structure of the regulating component;

[0028] Figure 6 is a structural schematic diagram of the adjustment component in a first state;

[0029] Figure 7 A schematic diagram of the structure of the regulating component between the first state and the second state;

[0030] Figure 8 is a structural schematic diagram of the adjustment component in the second state;

[0031] Fig. 9It is a structural schematic diagram of the folding chair in a sitting position;

[0032] Fig.10 It is a structural schematic diagram of a folding chair in a lying position.

[0033] In the figure: 1. folding chair bracket; 2. folding chair; 3. chair cushion; 10. support seat; 20. first support member; 30. second support member; 40. adjustment assembly; 41. adjustment rod; 411. first slide bar; 412. second slide bar; 413. intersection; 42. wrench linkage block; 421. assembly groove; 422. wrench member; 423. limiting nail; 43. shell; 431. protruding cavity; 44. base; 441. protruding rod; 442. inner opening; 443. outer opening; 45. first limiting member; 46. second limiting member; 47. third limiting member; 48. fourth limiting member; 49. beveled surface. DETAILED DESCRIPTION

[0034] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0035] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present 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 and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0036] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0037] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0038] In a preferred embodiment, see Figures 1 to 8The present application document provides a folding chair bracket 1, comprising: a support seat 10; a plurality of first support members 20, the first support members 20 being rotatably connected to the upper portion of the support seat 10; a plurality of second support members 30, the second support members 30 being rotatably connected to the lower portion of the support seat 10; an adjustment assembly 40, the adjustment assembly 40 being connected to the support seat 10; wherein the plurality of first support members 20 are all connected to the adjustment assembly 40, and the plurality of first support members 20 are associated with each other through the adjustment assembly 40, so as to adjust the unfolding angles of the plurality of first support members 20 relative to the support seat 10 through the adjustment assembly 40.

[0039] The support base 10 provides a function for the folding chair support 1, which is for the use state and the storage state of the folding chair support 1, that is, the support base 10 is used to link the rotation relationship between the first support member 20 and the second support member 30. Figure 1 What is shown in the figure is a structural schematic diagram of the folding chair bracket 1 in the use state. When the folding chair bracket 1 needs to be transformed from the use state to the storage state, at this time, only the first support member 20 (the second support member 30) needs to be rotated and folded to one side, and the second support member 30 (the first support member 20) can be rotated and folded to one side of the support seat 10 at the same time, so that the first support member 20 and the second support member 30 can be folded and stored together to the same side of the support seat 10.

[0040] Preferably, in order to ensure the neatness of the storage of the first support member 20 and the second support member 30 and the diversity of use by users and to facilitate users to turn at will, the support base 10 in the present application document can be divided into the upper and lower parts of the support base 10, and the two parts can rotate relative to each other.

[0041] Therefore, the adjustment component 40 provided in the present application document is a component used to adjust the angle of the first support member 20 relative to the support base 10 when the folding chair support 1 is in use. Specifically, the adjustment component 40 is fixedly connected to the top position of the support base 10 and is arranged close to the first support member 20. The adjustment component 40 is used to link the rotation angles between the multiple first support members 20 to determine the support angles between the multiple first support members 20, thereby providing different support effects.

[0042] The adjustment assembly 40 includes: a linkage component, which is connected to the plurality of first support members 20, and the position of the linkage component is adjusted to achieve the angle adjustment of at least one first support member 20, thereby synchronously driving the angle change of the remaining first support members 20. In one embodiment, the linkage component may include a planetary gear system, a sun gear is arranged at the center of the support seat 10, and a plurality of sets of planetary gears are respectively meshed with the plurality of first support members 20. When the adjustment shaft is rotated, the meshing angle of each gear is synchronously changed by the planet carrier to achieve the control of the deployment angle of the plurality of first support members 20. The structural setting of the planetary gear can meet the basic support angle adjustment requirements of the plurality of first support members 20, but at the same time, it will cause the deployment angles of the plurality of first support members 20 relative to the support seat 10 to be fixed, and it is impossible to achieve that the deployment angle of at least one first support member 20 relative to the support seat 10 is different from that of the remaining first support members 20.

[0043] Furthermore, the linkage component may also include a slide rail and a slider. Specifically, the slide rail is an arc-shaped slide rail, which is arranged on the side of the support seat 10, and the slider is specifically a T-shaped slider, so that the long strip end of the T-shaped slider cooperates with the slide rail, and the point end of the slider is rotatably connected to the root hinge point of the first support member 20, so that the angle change of the single first support member 20 relative to the support seat 10 can be directly determined by the moving position of the slider relative to the slide rail.

[0044] Among them, the number of sliders and slide rails corresponds to each other. In a specific embodiment, a slider can be optionally set on one or more first support members 20. Preferably, a slider is set on all first support members 20 to ensure the stability of the angle adjustment of the first support member 20. The side of the corresponding support seat 10 is provided with a number of slide rails corresponding to the number of sliders, and the two adjacent first support members 20 are interconnected by an additional retractable connecting rod. The larger the expansion angle of the first support member 20 relative to the support seat 10, the longer the connecting rod gradually extends. Therefore, in actual operation, the connecting rod is set between the two first support members 20 that need to be adjusted in an associated manner. By adjusting a single first support member 20, the slider can be moved relative to different positions on the slide rail, thereby adjusting the expansion angle of the first support member 20 relative to the support seat 10, and then the expansion angle of the remaining first support members 20 linked by the connecting rod relative to the support seat 10 is adjusted in a linked manner.

[0045] At the same time, a positioning groove with ratchet teeth can be set on the slide rail, and the slider has a spring-loaded steel ball positioning device built into it. Through the cooperation between the positioning groove and the steel ball, the first support member 20 can be quickly locked between multiple preset angle positions.

[0046] As a preference, in another preferred embodiment, the linkage component includes: an adjustment rod 41, the adjustment rod 41 is used to contact and abut against multiple first support members 20, and the adjustment rod 41 is moved to adjust the expansion angle of at least one first support member 20 relative to the support seat 10, so as to linkage adjust the expansion angle of the remaining first support members 20 relative to the support seat 10.

[0047] Furthermore, the adjustment rod 41 includes: a first slide bar 411 and a second slide bar 412, the first slide bar 411 and the second slide bar 412 are cross-arranged, and the first slide bar 411 and the second slide bar 412 can move relative to each other based on the intersection 413, and multiple first support members 20 are correspondingly abutted against the two ends of the first slide bar 411 and the second slide bar 412; wherein, by adjusting the expansion angle of at least one first support member 20 relative to the support seat 10, the first slide bar 411 and the second slide bar 412 are driven to move and adjust, and by moving the first slide bar 411 and the second slide bar 412, the expansion angles of the remaining first support members 20 relative to the support seat 10 are linked and adjusted. Among them, the cross-set first slide bar 411 and the second slide bar 412 only need to be limited by the track through the intersection 413. Compared with, for example, the first slide bar 411 and the second slide bar 412 set in parallel, there is no need to set a separate track fixation for each slide bar, which optimizes the structure of the adjustment component 40. The cross-set slide bars can enable the first slide bar 411 and the second slide bar 412 to interact and support each other when subjected to force through the intersection 413, thereby improving the structural stability.

[0048] Specifically, the first support members 20 and the second support members 30 in the present application are preferably set to four. Since the adjustment component 40 is applicable to the first support member 20, the four first support members 20 are matched to abut against the two ends of the first slide bar 411 and the second slide bar 412. Through the unfolding angle between the first support member 20 and the support seat 10, the folding chair bracket 1 is further defined as having two states in use, one is a sitting state, and the other is a lying state. The adjustment of the first slide bar 411 and the second slide bar 412 is carried out synchronously, and then the angle adjustment of the four first support members 20 relative to the support seat 10 is also carried out synchronously. Since the first slide bar 411 and the second slide bar 412 move synchronously, the angles of multiple support points can be changed synchronously during the adjustment process, which can meet the user's precise requirements for different inclinations and comfort of the chair, such as a smooth transition from a nearly vertical sitting position to a nearly lying leisure position.

[0049] And specifically Fig. 9 and Fig.10To illustrate, when the folding chair bracket 1 is in a sitting state, the angles of the two first support members 20 at the front end relative to the support seat 10 are smaller, while the angles of the two first support members 20 at the rear end relative to the support seat 10 are larger. When the folding chair bracket 1 is adjusted from a sitting state to a lying state, the angles of the two first support members 20 at the front end relative to the support seat 10 gradually increase, and then the angles of the two first support members 20 at the rear end relative to the support seat 10 gradually decrease.

[0050] Further, the adjustment assembly 40 further includes: a wrench linkage block 42, the wrench linkage block 42 is provided with an assembly groove 421, and the adjustment rod 41 is placed in the assembly groove 421. Figure 4 , part of the adjustment rod 41 is placed in the assembly groove 421 to limit the movable stroke of the adjustment rod 41. Specifically, the setting of the wrench linkage block 42 effectively prevents the adjustment rod 41 from excessively moving during the adjustment process, thereby avoiding collision or interference between the adjustment rod 41 and other components. Since the stroke of the adjustment rod 41 is limited by the distance of the assembly groove 421 in the wrench linkage block 42, the angle change range of the first support member 20 is also limited to a reasonable range, which avoids the safety hazard of the chair structure being unstable or even tipping over due to excessive adjustment of the angle of the first support member 20, ensuring the safety of the user during use. At the same time, the setting of the wrench linkage block 42 integrates the movement of the first slide bar 411 and the second slide bar 412, making the movement adjustment of the first slide bar 411 and the second slide bar 412 more unified.

[0051] Preferably, the adjustment assembly 40 also includes: a shell 43, the shell 43 is covered on the outside of the adjustment rod 41, the shell 43 is used to connect with the support seat 10, and specifically, the shell 43 is detachably connected to the support seat 10 through a buckle, so as to facilitate the maintenance of the adjustment rod 41 and the wrench linkage block 42 and other components inside the shell 43, and the shell 43 is provided with a protruding cavity 431 corresponding to the extension direction of the adjustment rod 41, and the protruding cavity 431 guides and limits the moving direction of the adjustment rod 41. Specifically, the shell 43 is stacked on the wrench linkage block 42, and the parts of the first slide bar 411 and the second slide bar 412 in the adjustment rod 41 that extend out of the assembly slot 421 are guided by the protruding cavity 431. For details, see Figure 5 and Figure 6 The protruding cavity 431 provided on the shell 43 is engaged with the protruding parts of the ends of the first slide bar 411 and the second slide bar 412, so the shell 43 is also in a cross shape to adapt to the movement trajectory of the first slide bar 411 and the second slide bar 412. The shell 43 has a protective effect on the wrench linkage block 42 and the adjusting rod 41, and at the same time has a limiting and guiding function for the movement trajectory of the first slide bar 411 and the second slide bar 412.

[0052] Further preferably, the adjusting rod 41 assembly also includes: a base 44, one end of the base 44 is axially connected to the support seat 10, and the other end of the base 44 is connected to the adjusting rod 41 and the wrench linkage block 42 through a protruding stud, and the stud is embedded in the sliding groove provided by the wrench linkage block 42 and the adjusting rod 41, so that the wrench linkage block 42 and the adjusting rod 41 can move relative to the base 44, and the moving directions of the wrench linkage block 42 and the adjusting rod 41 are consistent, and the cross shape of the base 44 cooperates with the shell 43 to further limit the movable range of the adjusting rod 41.

[0053] For further preference, see Figures 5 to 8 The base 44 is provided with a protruding rod 441, and the extending direction of the protruding rod 441 is consistent with the extending direction of the wrench linkage block 42; correspondingly, a movable wrench piece 422 is provided at the end of the wrench linkage block 42, and the wrench piece 422 is used to be fixedly matched with the protruding rod 441; wherein, the wrench linkage block 42 moves with the movement of the adjusting rod 41, and then the wrench linkage block 42 moves relative to the protruding rod 441, so that the wrench piece 422 forms a multi-gear cooperation with different position distances relative to the protruding rod 441, so as to realize the fixation of the adjusting rod 41 at different positions relative to the support seat 10.

[0054] Specifically, the protruding rod 441 is provided with an inner opening 442 and an outer opening 443, and the wrench member 422 is provided with a limiting pin 423, which is inserted into the inner opening 442 or the outer opening 443 to fix the positions of the first slide bar 411 and the second slide bar 412, thereby determining the posture state of the folding chair bracket 1.

[0055] Further preferably, a limit member is provided on the first slide bar 411 and the second slide bar 412, and the first slide bar 411 and the second slide bar 412 are linked to move by changing the angle between at least one first support member 20 and the support seat 10, and the moving stroke of the first slide bar 411 and the second slide bar 412 is limited by the limit member to stop, thereby limiting the angle change range of the first support member 20. Among them, the first slide bar 411 is provided with a staggered first limit member 45 and a second limit member 46 on both sides of the intersection 413; the second slide bar 412 is provided with a staggered third limit member 47 and a fourth limit member 48 on both sides of the intersection 413, the first limit member 45 and the third limit member 47 are arranged opposite to each other, and the second limit member 46 and the fourth limit member 48 are arranged opposite to each other; wherein, when the first slide bar 411 and the second slide bar 412 move along the first direction X1, the first limit member 45 and the third limit member 47 approach each other, and the corresponding second limit member 46 and the fourth limit member 48 move away from each other. Similarly, when the first slide bar 411 and the second slide bar 412 move along the second direction X2, the first limit member 45 and the third limit member 47 move away from each other, and the corresponding second limit member 46 and the fourth limit member 48 approach each other, so as to fix and limit the position of the first slide bar 411 relative to the second slide bar 412, and the first direction X1 is opposite to the second direction X2. The four stoppers are all wedge-shaped protrusions, which can stop the first slide bar 411 and the second slide bar 412 from moving relative to each other by abutting against each other with their wedge-shaped surfaces.

[0056] By setting the stoppers at specific positions on the first slide bar 411 and the second slide bar 412, the relative movement range of the first slide bar 411 and the second slide bar 412 can be accurately limited. When the first slide bar 411 and the second slide bar 412 move along the first direction X1 or the second direction X2, the relationship between the stoppers approaching or moving away from each other enables them to accurately limit the further movement of the slide bars when they reach a specific position, ensuring that each position in the adjustment process has a clear limit, thereby achieving precise control of the unfolding angle of the first support member 20, allowing the user to adjust the chair to a specific and precise angle as needed.

[0057] At the same time, when the folding chair 2 is under pressure, the abutment between the limiting members can share part of the force from the slide bar and the support member. When the limiting members of the wedge-shaped structure abut against each other, the force can be evenly distributed to the slide bar and the entire support structure, avoiding the situation of excessive local force, enhancing the bearing capacity of the entire structure, and making the chair more stable and durable. Moreover, when the limiting members of the wedge-shaped structure abut against each other, they can achieve stopping in a relatively stable and uniform manner. Compared with other possible limiting methods, the friction and wear of the slide bar during the limiting process can be reduced, the service life of the slide bar and the limiting member can be extended, and the performance and accuracy of the adjustment component 40 will not be greatly affected in long-term use.

[0058] Therefore, in a specific use process, first of all, it is necessary to ensure that the folding chair bracket 1 is in use. Figure 4 , Figures 6 to 8 Among the four first support members 20, the two first support members 20 close to the wrench member 422 are the first group, and the two first support members 20 away from the wrench member 422 are the second group. When the folding chair bracket 1 is in use, the four first support members 20 are all in contact with the two ends of the first slide bar 411 and the second slide bar 412. For the convenience of explanation, Figures 5 to 8 The first support member 20 is not shown.

[0059] in, Figure 6 The diagram in FIG. 4 shows a schematic diagram of the structure of the adjustment component 40 in the first state. The first state of the adjustment component 40 corresponds to Fig. 9 The structure of the folding chair 2 in the sitting position is shown in the figure. Figure 8 The schematic diagram of the structure of the adjustment component 40 in the second state is shown. The second state of the adjustment component 40 corresponds to Fig.10 In the sitting position, the extension length of the first slide bar 411 and the second slide bar 412 near the wrench member 422 is greater than the extension length on the opposite side, and the limit pin 423 on the wrench member 422 is engaged in the outer opening 443. At this time, the first support member 20 of the first group is at a smaller angle relative to the support seat 10, while the first support member 20 of the second group is at a larger angle relative to the support seat 10. At this time, if multiple first support members 20 are externally connected to the chair cushion 3, the state is as follows: Fig. 9As shown, the folding chair 2 is in a sitting state. For example, when the user sits on the seat cushion 3 and lies back against the seat cushion 3, the user only needs to hold the wrench member 422 and pull it upward to disengage the limiting pin 423 from the outer opening 443. When the limiting pin 423 is separated from the outer opening 443, the wrench linkage block 42 and the first slide bar 411 and the second slide bar 412 resume the movable state. As the user lies back against the seat cushion 3, the angle of the first support member 20 of the first group relative to the support seat 10 gradually increases, and then the first support member 20 of the first group is connected to the first side close to the wrench. A certain thrust is applied to both ends of the slide bar 411 and the second slide bar 412, so that the first slide bar 411 and the second slide bar 412 move toward the first direction X1, and the wrench linkage block 42 also moves toward the first direction X1, and then the first slide bar 411 and the second slide bar 412 push the second group of first support members 20 to gradually reduce the angle relative to the support seat 10, until the second limit member 46 and the fourth limit member 48 abut against each other, and the limit pin 423 on the wrench member 422 is then inserted into the inner opening 442 to complete the fixation, so as to realize the self-locking function in the posture adjustment process. It should be noted that the process of changing from the lying state to the sitting state is the same as the above, and the user only needs to pull the wrench member 422 on one side and adjust his or her sitting posture at the same time, without changing the size of the seat cushion 3, and the first group of first support members 20 can realize the follow-up of the posture of the folding chair 2 relative to the user's posture through the adjustment component 40 to link the second group of first support members 20.

[0060] Further explanation: Figure 7 4 is a schematic diagram of the structure of the adjustment component 40 in the adjustment process, and in order to facilitate the display of the movement process of the first slide bar 411 and the second slide bar 412, Figure 7 The base 44 is omitted, so Figure 7 The position states of the first slide bar 411 and the second slide bar 412 can be regarded as Figure 6 The adjustment component 40 in the first state is adjusted to Figure 8 The transition state of the adjustment assembly 40 in the second state. In this state, the first slide bar 411 and the second slide bar 412 gradually move toward the first direction X1, and the first limiter 45 and the third limiter 47 gradually approach each other, and the second limiter 46 and the fourth limiter 48 gradually move away from each other, and the wrench linkage block 42 gradually moves toward the first direction X1.

[0061] It should be noted that, in some embodiments, when the user turns the wrench 422 to make the limit pin 423 disengage from the inner opening 442 or the outer opening 443, before the limit pin 423 is re-embedded in the outer opening 443 or the inner opening 442, the angle change between the first support members 20 driven by the movement of the first slide bar 411 and the second slide bar 412 is stepless adjustment. Therefore, in some specific embodiments, the distance between the inner opening 442 and the outer opening 443 is increased, thereby increasing the pitch adjustment range of the multiple first support members 20 in the present application document, and at the same time expanding the range of stepless adjustment of the first support member 20, thereby providing users with more optional options for use, similar to the free-range mode included in the ergonomic chair.

[0062] Further preferably, both ends of the first slide bar 411 and the second slide bar 412 are provided with a chamfer 49, and the chamfer 49 is used to correspond and adapt to abut against a plurality of first support members 20. The chamfer 49 enables the first slide bar 411 and the second slide bar 412 to transfer force to the first support member 20 more smoothly during the movement, and at the same time facilitates the first group of first support members 20 to transfer thrust to the ends of the first slide bar 411 and the second slide bar 412 more smoothly, that is, to facilitate bilateral force transmission. Compared with abutting against a plane, the contact mode between the chamfer 49 and the first support member 20 can decompose and transmit force along a specific direction, reduce force loss and energy loss, make the adjustment process more labor-saving and smooth, and avoid jamming during posture adjustment.

[0063] At the same time, when the first support member 20 is subjected to the force from the chamfered surface 49, the shape of the chamfered surface 49 can make the pressure more evenly distributed on the contact surface between the first support member 20 and the slide rod. This helps to reduce the situation of excessive local pressure and avoid deformation and damage of the first support member 20 due to local stress concentration during long-term use.

[0064] It should be noted that the adjustment assembly 40 is fixedly arranged on the support seat 10, and the first slide bar 411 and the second slide bar 412 are adjusted against the first support member 20 through the cut bevels of the first slide bar 411 and the second slide bar 412. Therefore, the adjustment assembly 40 does not participate in the storage process of the folding chair support 1 in the present application document. The adjustment assembly 40 only participates in the adjustment of the pitch angle of multiple first support members 20 when the folding chair support 1 is in use. Therefore, the extension and retraction of the first slide bar 411 and the second slide bar 412 in the adjustment assembly 40 does not affect the folding of multiple first support members 20 toward the same side of the second support member 30 during the storage process. And through the movement and adjustment of the first slide bar 411 and the second slide bar 412, the unfolding angle of at least one first support member 20 relative to the support seat 10 is different from that of the other first support members 20, so as to complete the transition of the folding chair support 1 from the sitting state to the lying state.

[0065] Furthermore, the present application document also provides a folding chair 2, see Figures 9 and 10 , comprising: a folding chair bracket 1 as any one of the above items; a seat cushion 3, wherein the folding chair bracket 1 and the seat cushion 3 are detachably connected, and the seat cushion 3 can be adjusted to various positions through the folding chair bracket 1. Preferably, the folding chair 2 in the present application document comprises Fig. 9 Sitting posture and Fig.10 The folding chair 2 can smoothly transition from the sitting position (lying position) to the lying position (sitting position).

[0066] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A folding chair bracket, characterized in that: include: Support seat; A plurality of first support members, wherein the first support members are rotatably connected to the upper portion of the support seat; A plurality of second support members, wherein the second support members are rotatably connected to the lower portion of the support seat; An adjustment component is connected to the support seat and links multiple first support members, so that the angle adjustment of at least one of the first support members synchronously drives the angle change of the remaining first support members through the adjustment component.

2. The folding chair bracket according to claim 1, characterized in that: The adjustment component comprises: A linkage component is connected to the plurality of first supporting members, and the position of the linkage component is adjusted to achieve angle adjustment of at least one of the first supporting members, thereby synchronously driving the angle changes of the remaining first supporting members.

3. The folding chair bracket according to claim 2, characterized in that: The linkage component comprises: A slide rail, a slider and a connecting rod, wherein the slide rail is arranged on the side of the support seat, one end of the slider is rotatably connected to the first support member, and the other end is embedded in the slide rail for cooperation, and the two adjacent first support members are interconnected through the retractable connecting rod, and the slider slides to adjust the expansion angle of the first support member relative to the support seat, thereby linking and adjusting the expansion angle of the remaining first support members linked by the connecting rod relative to the support seat.

4. The folding chair bracket according to claim 2, characterized in that: The linkage component comprises: An adjusting rod, wherein the adjusting rod is used to contact and abut against a plurality of the first supporting members, and is moved by the adjusting rod to adjust the angle change of at least one of the first supporting members relative to the supporting seat, so as to drive the angles of the remaining first supporting members relative to the supporting seat to be adjusted synchronously.

5. The folding chair bracket according to claim 4, characterized in that: The adjusting rod comprises: A first sliding bar and a second sliding bar, wherein the first sliding bar and the second sliding bar are cross-arranged and can move relative to each other based on the intersection, and the first supporting members are respectively against two ends of the first sliding bar and the second sliding bar; Among them, by adjusting the expansion angle of at least one of the first support members relative to the support base, the first slide bar and the second slide bar are driven to move and adjust, and through the movement of the first slide bar and the second slide bar, the expansion angles of the remaining first support members relative to the support base are linked and adjusted.

6. The folding chair bracket according to claim 4, characterized in that: The adjustment component also includes: The wrench linkage block is provided with a mounting groove, and the adjusting rod is placed in the mounting groove to limit the movable stroke of the adjusting rod.

7. The folding chair bracket according to claim 6, characterized in that: The adjustment component also includes: A shell is covered on the outside of the adjusting rod, the shell is used to be connected to the support seat, and the shell is provided with a protruding cavity corresponding to the extending direction of the adjusting rod, and the protruding cavity guides and limits the moving direction of the adjusting rod.

8. The folding chair support according to claim 7, characterized in that: The adjusting rod assembly also includes: A base, one end of which is axially connected to the support seat, and the other end of which is connected to the adjusting rod and the wrench linkage block; The wrench linkage block and the adjusting rod are movable relative to the base in the same direction, and the base cooperates with the shell to further limit the movable range of the adjusting rod.

9. The folding chair support according to claim 8, characterized in that: The base is provided with a convex rod, and the extending direction of the convex rod is consistent with the extending direction of the wrench linkage block; Correspondingly, a movable wrench piece is provided at the end of the wrench linkage block, and the wrench piece is used to be fixedly matched with the convex rod; Among them, the wrench linkage block moves with the movement of the adjusting rod, and then the wrench linkage block moves relative to the protruding rod, so that the wrench piece forms a multi-gear cooperation with different position distances relative to the protruding rod, so as to realize the fixation of the adjusting rod at different positions relative to the support seat.

10. The folding chair support according to claim 5, characterized in that: The first slide bar and the second slide bar are provided with a limit piece, and the first slide bar and the second slide bar are linked to move by changing the angle between at least one of the first support members relative to the support seat. The limit piece is used to limit the moving stroke of the first slide bar and the second slide bar to limit the angle change range of the first support member.

11. The folding chair support according to claim 10, characterized in that: The limiting member includes a first limiting member, a second limiting member, a third limiting member and a fourth limiting member; Wherein, a first limiter and a second limiter are provided on both sides of the intersection on the first slide bar; A third limiting member and a fourth limiting member are provided on both sides of the intersection of the second sliding rod, the first limiting member and the third limiting member are arranged opposite to each other, and the second limiting member and the fourth limiting member are arranged opposite to each other; When the first sliding bar and the second sliding bar move along the first direction, the first limiting member and the third limiting member approach each other, and the corresponding second limiting member and the fourth limiting member move away from each other. Similarly, when the first sliding bar and the second sliding bar move along the second direction, the first limiting member and the third limiting member move away from each other, and the corresponding second limiting member and the fourth limiting member approach each other, so as to fix the position of the first sliding bar relative to the second sliding bar, and the first direction is opposite to the second direction.

12. The folding chair support according to claim 5, characterized in that: Both ends of the first sliding rod and the second sliding rod are provided with chamfered surfaces, and the chamfered surfaces are adapted to correspond and abut against the first supporting members.

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