Backrest assembly of seat and seat
The backrest assembly with sliding and rotational transmission assemblies addresses the issue of non-adaptive seat backrests by allowing the backrest to adjust to the user's posture, enhancing comfort and support.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- QINGXIAN INTELLIGENT INNOVATION (SHENZHEN) CO LTD
- Filing Date
- 2025-10-17
- Publication Date
- 2026-05-15
AI Technical Summary
Existing seat backrests fail to adaptively adjust to the user's sitting posture, leading to poor comfort during use.
A backrest assembly with a sliding and rotational transmission assembly that allows the backrest main body to move relative to the backrest bracket, incorporating sliding and rotating members to accommodate changes in posture.
Enhances user comfort by adaptively adjusting to the user's posture, providing improved support and stability.
Smart Images

Figure CN2025128566_15052026_PF_FP_ABST
Abstract
Description
BACKREST ASSEMBLY OF SEAT AND SEATCROSS-REFERENCE TO RELATED APPLICATION (S)
[0001] The present application claims the benefit and priority to Chinese Patent Application Serial No. 202422746052.5, filed on November 08, 2024, entitled “backrest assembly of seat and seat” , and the content of which is hereby fully incorporated by reference into the present application.FIELD
[0002] The subject matter relates to the technologies of seat, and more particularly, to a backrest assembly of seat and a seat.BACKGROUND
[0003] In places such as offices and study rooms, seats are commonly seen, which can meet need of people for sitting to work, study, or rest.
[0004] A seat is usually composed of a plurality of components such as a seat cushion, a backrest, armrests, and a headrest. The backrest, as a component that provides support for a human back, can allow the user to maintain the sitting posture and reduce the pressure on the cervical spine, back, and waist.
[0005] In related arts, when the sitting posture of the user is adjusted, the backrest of the seat is difficult to be adaptively adjusted according to the adjustment of the sitting posture of the user, resulting in poor comfort of the user when using the seat.SUMMARY
[0006] The main objective of the present disclosure is to provide a backrest assembly of a seat, which can enhance the comfort of users during seat use.
[0007] A backrest assembly of a seat includes a backrest bracket, a backrest main body, a first transmission assembly, and a second transmission assembly. A backrest bracket is configured to be connected to a base of the seat. A backrest main body is arranged on one side of the backrest bracket. A first transmission assembly is arranged between the backrest bracket and the backrest main body, the first transmission assembly is in transmission connection with the backrest main body. A second transmission assembly is arranged between the backrest bracket and the backrest main body and spaced from the first transmission assembly along a longitudinal direction of the backrest bracket, the second transmission assembly is in transmission connection with the backrest main body. Wherein, the first transmission assembly is slidably connected to the backrest bracket, and the second transmission assembly is rotatably connected to the backrest bracket, so that the backrest main body is configured to move relative to the backrest bracket when the backrest assembly is subjected to an external force.
[0008] The first transmission assembly includes a sliding member slidably arranged on the backrest bracket and in transmission connection with the backrest main body.
[0009] The backrest bracket is provided with a sliding cavity extending along the longitudinal direction, and the sliding member is inserted into the sliding cavity and configured to slide along the sliding cavity.
[0010] A sliding structure is provided on at least one of the backrest bracket and the sliding member for supporting the sliding member when the sliding member slides along the sliding cavity.
[0011] The sliding structure includes at least one support member rotatably arranged on one of the backrest bracket and the sliding member, and is in a rolling contact with another one of the backrest bracket and the sliding member.
[0012] The first transmission assembly further includes a first support member rotatably connected to the sliding member, the sliding member is in transmission connection with the backrest main body through the first support member.
[0013] The first transmission assembly further includes at least two sets of second support members respectively arranged on opposite sides of the first support member. Each of the at least two sets of the second support members includes at least one second support member, each second support member is movably connected to the first support member. The first support member is movably connected to the backrest main body through the at least two sets of second support members.
[0014] One of the backrest main body and the second support member is provided with a first accommodation cavity, another one of the backrest main body and the second support member is provided with a first fitting member. The first fitting member is accommodated in the first accommodation cavity to enable the second support member to be movably connected to the backrest main body.
[0015] The second transmission assembly includes a rotating member. One end of the rotating member is rotatably connected to the backrest bracket, and another end of the rotating member is in transmission connection with the backrest main body.
[0016] The second transmission assembly further includes a third support member rotatably connected to the rotating member. The rotating member is in transmission connection with the backrest main body through the third support member.
[0017] The second transmission assembly further includes at least two sets of fourth support members respectively arranged on opposite sides of the third support member. Each of the at least two sets of fourth support members includes at least one fourth support member. The at least one fourth support member is movably connected to the third support member. The third support member is movably connected to the backrest main body through the at least two sets of fourth support members.
[0018] One of the backrest main body and the at least one fourth support member is provided with a second accommodation cavity, and another one of the backrest main body and the at least one fourth support member is provided with a second fitting member. The second fitting member is accommodated in the second accommodation cavity to enable each of the at least one fourth support member to be movably connected to the backrest main body.
[0019] The backrest assembly further includes a first linkage member. One end of the first linkage member is hinged to the first transmission assembly, and another end of first linkage member is hinged to the second transmission assembly.
[0020] The backrest assembly further includes a second linkage member. One end of the second linkage member is hinged to the second transmission assembly, and another end of the second linkage member is hinged to the base of the seat.
[0021] The backrest main body is provided with a plurality of openings. The plurality of openings is located on two side edges of the backrest main body opposite to each other along a transverse direction of the backrest main body, and each of the plurality of openings extends from one of the two side edges of where the each of the plurality of openings is located toward another one of the two side edges.
[0022] The backrest main body includes a plurality of support ribs. Two of the plurality of support ribs spaced from each other along the longitudinal direction of the backrest main body, and two of the plurality of support ribs defining one of the plurality of openings therebetween.
[0023] A seat includes a base and the backrest assembly, the backrest bracket is connected to the base.
[0024] The backrest assembly of the seat through the sliding connection design of the first transmission assembly and the rotational connection design of the second transmission assembly, so that the backrest main body can move relative to the backrest bracket. When the backrest assembly is subjected to the external force (such as the force exerted by the human body leaning against the backrest assembly and leaning backward) , the backrest main body will move relative to the backrest bracket, such as following the back and / or waist of the user during the backward leaning process, thereby adapting to the change of the sitting posture of the user and providing the user with more comfortable support, which can improve the comfort of the user when using the seat.BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Implementations of the present technology will now be described, by way of embodiment, with reference to the attached figures. Obviously, the drawings are only some embodiments of the present disclosure. For those ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.
[0026] FIG. 1 is a structural schematic view of a seat according to an embodiment of the present disclosure.
[0027] FIG. 2 is a structural schematic view of a portion of a backrest assembly of the seat in an embodiment of the present disclosure.
[0028] FIG. 3 is a structural schematic view of another portion of the backrest assembly of the seat in an embodiment of the present disclosure.
[0029] FIG. 4 is a structural schematic view of yet another portion of the backrest assembly of the seat in an embodiment of the present disclosure.
[0030] FIG. 5 is an exploded view of yet another portion of the backrest assembly of the seat in an embodiment of the present disclosure.
[0031] FIG. 6 is a structural schematic view of yet another portion of the backrest assembly of the seat in an embodiment of the present disclosure.
[0032] FIG. 7 is an enlarged view of area A in FIG. 6.
[0033] FIG. 8 is a structural schematic view of the connection between a first support member and a second support member in an embodiment of the present disclosure.
[0034] FIG. 9 is a structural schematic view of a second support member in an embodiment of the present disclosure.
[0035] FIG. 10 is a structural schematic view of a fourth support member in an embodiment of the present disclosure.DETAILED DESCRIPTION
[0036] The following will clearly and completely describe the solutions in the embodiments of the present disclosure in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a portion of the embodiments of the present disclosure, rather than all of them. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.
[0037] It should be noted that all directional indications (such as up, down, left, right, front, rear, etc. ) in the present disclosure are only used to explain the relative positional relationship and movement conditions of each component in a specific posture (as shown in the accompanying drawings) . When the specific posture changes, the directional indications shall also change accordingly.
[0038] It should also be noted that when an element is referred to as being “fixed to” or “arranged on” another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or there may be an intermediate element at the same time.
[0039] In addition, the descriptions involving “first” , “second” , etc. in the present disclosure are only for descriptive purposes and shall not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include at least one of such features. Furthermore, the technical solutions between various embodiments can be combined with each other, but it must be based on the premise that those of ordinary skill in the art understand that the combined technical solutions can be realized. When the combination of technical solutions contradicts or cannot be realized, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present disclosure.
[0040] As a seating tool for users to sit thereon when working, studying, or resting, the technology of the seat is developing towards a more humanized and intelligent direction, striving to provide the users with a comfortable and healthy sitting posture experience.
[0041] Generally speaking, the seat mainly includes structures such as a base, a seat cushion, and a backrest. The base (which can also be named as a chassis) , as the foundation of the entire seat structure, supports the weight of the human body and the pressures that may be generated during use, and has sufficient strength and stability. Moreover, the base is a key component connected to the main body of the seat (such as the backrest, seat cushion, etc. ) , which combines various component together through specific connection methods (such as fixed connection, rotational connection, etc. ) to form a complete seat structure. The seat cushion is arranged on the base, and the backrest is arranged on the seat cushion and at a rear side of the seat cushion. When a user sits on the seat, the user usually sits on the seat cushion, and the seat cushion correspondingly provides support for the buttocks and thighs of the human body. In addition, the back and / or waist can lean against the backrest, and the backrest provides support for the back and / or waist of the human body.
[0042] A backrest assembly 100 of a seat is provided according to an embodiment of the present disclosure. Referring to FIG. 1, the backrest assembly 100 of the seat includes a backrest bracket 110, a backrest main body 120, a first transmission assembly 130, and a second transmission assembly 140.
[0043] The backrest bracket 110 is connected to the base 200 of the seat.
[0044] The backrest main body 120 is arranged on one side of the backrest bracket 110.
[0045] The first transmission assembly 130 is arranged between the backrest bracket 110 and the backrest main body 120. The first transmission assembly 130 is in transmission connection with the backrest main body 120.
[0046] The second transmission assembly 140 is arranged between the backrest bracket 110 and the backrest main body 120 and is spaced apart from the first transmission assembly 130 along a longitudinal direction of the backrest bracket 110. The second transmission assembly 140 is in transmission connection with the backrest main body 120.
[0047] Wherein, the first transmission assembly 130 is slidably connected to the backrest bracket 110, and the second transmission assembly 140 is rotatably connected to the backrest bracket 110, so that the backrest main body 120 can move relative to the backrest bracket 110 when the backrest assembly 100 is subjected to an external force.
[0048] The backrest bracket 110 can be arranged at the rear side of the base 200 and connected to the base 200. The backrest bracket 110 is used to cooperate with the backrest main body 120 to provide support for the human back and / or waist. The connection manner between the backrest bracket 110 and the base 200 includes fixed connection or rotatable connection, which is not limited. An external shape of the backrest bracket 110 is substantially rod-shaped, extending along the longitudinal direction of the seat. The above shape can also be arc-shaped, S-shaped, L-shaped, etc., which can be set according to actual structural requirements. To ensure sufficient supporting strength, the backrest bracket 110 can be made of materials such as metal (such as steel, aluminum alloy, etc. ) , plastic, etc.
[0049] The backrest bracket 110 is provided with a backrest support portion 111 and a base connection portion 112. The backrest support portion 111 supports the backrest main body 120. The base connection portion 112 is rotatably connected to the base 200. The rotatable connection structure between the backrest bracket 110 and the base 200 can be as follows. The base connection portion 112 of the backrest bracket 110 is inserted into the base 200 through a hinge shaft Jz to realize rotatable connection with the base 200. Furthermore, the base connection portion 112 of the backrest bracket 110 can be fixed to a rotating member 113, and the rotating member 113 is sleeved on the hinge shaft Jz to realize rotatable connection with the base 200. The above description is only exemplary but not for limiting purpose.
[0050] As a core support structure of the backrest assembly 100, the backrest main body 120 can be made of nylon, metal, high-strength plastic, etc. The backrest main body 120 is used to provide necessary strength and rigidity to support the back and / or waist of human body. A filling layer can be provided on the backrest main body 120 and wrapped by an outer skin. The main role of the filling layer is to provide comfortable support and cushioning. The materials of the filling layer can be selected from such as sponge, foam plastic, memory cotton, etc. The outer skin plays the role of protecting the filling layer and providing aesthetics, which can be fabric, leather, artificial leather, etc., and can be selected according to actual needs, which is not limited here.
[0051] The backrest main body 120 can be a single-body structure, that is, the number of main bodies is one. The backrest main body 120 is set corresponding to the human body, which can only provide support for the human back, or only for the human waist, or can provide support for the human back and waist at the same time. In addition, the backrest main body 120 can also be a multi-body structure, and the number of main bodies is more than one. For example, the backrest main body 120 is a double-body structure. Specifically, the backrest main body 120 has a first backrest main body and a second backrest main body. Along the longitudinal direction of the seat, the first backrest main body and the second backrest main body are arranged in sequence. The first backrest main body can provide support for the human back, and the second backrest main body can provide support for the human waist. Or, along a transverse direction of the seat, the first backrest main body and the second backrest main body are arranged in sequence. This is only exemplary but not for limiting purpose.
[0052] As shown in FIG. 1, in the longitudinal direction of the backrest bracket 110, the first transmission assembly 130 and the second transmission assembly 140 are spaced apart from each other. The first transmission assembly 130 is slidably connected to the backrest bracket 110 and in transmission connection with the backrest main body 120, so that the backrest main body 120 can slide relative to the backrest bracket 110 through the first transmission assembly 130. The structural composition of the first transmission assembly 130 can be various, as long as the first transmission assembly 130 can support the backrest main body 120 to slide relative to the backrest bracket 110, and specific examples will be further described in subsequent embodiments. The second transmission assembly 140 is rotatably connected to the backrest bracket 110 and in transmission connection with the backrest main body 120, so the backrest main body 120 can rotate relative to the backrest bracket 110 through the second transmission assembly 140. The structural composition of the second transmission assembly 140 can be various, as long as the second transmission assembly 140 can support the backrest main body 120 to rotate relative to the backrest bracket 110, and specific examples will be further described in subsequent embodiments. The connection manner of the transmission connection between the first transmission assembly 130, the second transmission assembly 140, and the backrest main body 120 can be fixed connection, movable connection, etc., which is not limited in this embodiment, as long as the power transmission between the first transmission assembly 130, the second transmission assembly 140 and the backrest main body 120 can be realized.
[0053] The movement of the backrest main body 120 relative to the backrest bracket 110 may include the follows. The backrest main body 120 slides relative to the backrest bracket 110 through the first transmission assembly 130, and at the same time rotates relative to the backrest bracket 110 through the second transmission assembly 140 to change the angle and / or position.
[0054] When the backrest assembly 100 is subjected to the external force, the backrest main body 120 moves relative to the backrest bracket 110, which can be as follows. When the user applies force to the backrest main body 120, but the force is not enough to allow the backrest bracket 110 rotate relative to the base 200 or the backrest bracket 110 cannot rotate relative to the base 200, the backrest main body 120 can still move relative to the backrest bracket 110 (with a relatively small movement range) to achieve adaptive adjustment.
[0055] Or, when the user applies force to the backrest main body 120 or the backrest bracket 110, and the backrest bracket 110 can rotate relative to the base 200 and the force can allow the backrest bracket 110 rotate relative to the base 200, the backrest main body 120 is driven to move relative to the backrest bracket 110 (with a relatively large movement range) to achieve adaptive adjustment.
[0056] Specifically, when force is applied to the backrest main body 120, the backrest main body 120 will adaptively slide on the backrest bracket 110 through the first transmission assembly 130 and adaptively rotate through the second transmission assembly 140. Further, when force is applied to the backrest main body 120 or the backrest bracket 110 to allow the backrest bracket 110 rotate, the backrest bracket 110 will drive the first transmission assembly 130 and the second transmission assembly 140 to move, and the backrest main body 120 will simultaneously adaptively adjust the angle and / or position.
[0057] In the embodiment, the backrest assembly 100 of the seat utilizes the sliding connection design of the first transmission assembly 130 and the rotational connection design of the second transmission assembly 140 to enable the backrest main body 120 to move relative to the backrest bracket 110. When the backrest assembly 100 is subjected to the external force (such as the force exerted by the human body leaning against the backrest assembly 100 and leaning backward) , the backrest main body 120 will move relative to the backrest bracket 110, such as following the back and / or waist of the user during the backward leaning process, thereby adapting to the change of the sitting posture of the user and providing the user with more comfortable support, which can improve the comfort of the user when using the seat.
[0058] In some embodiments, referring to FIGS. 1 and 2, the first transmission assembly 130 includes a sliding member 131. The sliding member 131 is slidably arranged on the backrest bracket 110 and in transmission connection with the backrest main body 120. The sliding member 131 is installed on the backrest bracket 110 and can slide on the backrest bracket 110. Specifically, the sliding member 131 can adopt structural forms such as a sliding rod, a sliding cylinder, a sliding seat, a sliding frame, a sliding rail, etc., to slidably cooperate with the backrest bracket 110 to achieve slidable arrangement on the backrest bracket 110. On the backrest bracket 110, the sliding member 131 can be arranged on an upper portion of the backrest bracket 110 to correspond to the upper half of the backrest main body 120 (which can also be regarded as the portion of the backrest main body 120 for supporting the human back) . The backrest main body 120 and the sliding member 131 are in a transmission connection. Through the sliding member 131, the backrest main body 120 can slide relative to the backrest bracket 110, and the sliding member 131 correspondingly supports the sliding of the backrest main body 120 on the backrest bracket 110.
[0059] The sliding of the sliding member 131 can be actuated in the following ways.
[0060] Firstly, when the user leans against the backrest main body 120, when the user leans backward, the force applied to the backrest main body 120 increases, and the force received by the backrest main body 120 is simultaneously applied to the sliding member 131 and the backrest bracket 110, so that the backrest bracket 110 correspondingly rotates backward, and at the same time, the sliding member 131 slides on the backrest bracket 110, thereby supporting the backrest main body 120 to slide relative to the backrest bracket 110.
[0061] Secondly, a linkage structure can be configured based on the sliding member 131, and the linkage structure is connected between the sliding member 131 and the base or seat cushion of the seat. When the user directly applies a force to the backrest bracket 110 or the user leans backward against the backrest main body 120 to allow the backrest bracket 110 rotate backward, the linkage structure drives the sliding member 131 to move together, specifically, the linkage structure can pull the sliding member 131 to allow the sliding member 131 slide on the backrest bracket 110, and the sliding member 131 further drives the backrest main body 120 to slide relative to the backrest bracket 110.
[0062] Thirdly, the sliding member 131 is also connected to other components of the seat (such as the headrest 300) . By applying the force to the corresponding components, the force simultaneously acts on the sliding member 131 and the backrest bracket 110, so that the backrest bracket 110 rotates backward, and at the same time, the sliding member 131 slides on the backrest bracket 110, thereby supporting the backrest main body 120 to slide relative to the backrest bracket 110.
[0063] That is, when the backrest bracket 110 rotates relative to the base 200, the backrest main body 120 slides on the backrest bracket 110 through the sliding member 131, and the sliding member 131 supports the backrest main body 120 to slide on the backrest bracket 110. Or the sliding member 131 slides on the backrest bracket 110 to drive the backrest main body 120 to slide relative to the backrest bracket 110.
[0064] In the embodiment, when the user sits on the seat and leans backward against the backrest main body 120, the backrest main body 120 and the backrest bracket 110 will rotate relative to the base 200. At the same time, the sliding member 131 will slide on the backrest bracket 110 (such as sliding downward) to drive the backrest main body 120 to move (such as sliding downward) , so as to adjust the position and / or angle of the backrest main body 120, so that the backrest main body 120 follows the body part (such as the back) of the user to provide support, adapts to the posture change of the user, and improves the comfort of the user using the seat.
[0065] In some embodiments, referring to FIGS. 2 and 3, the backrest bracket 110 is provided with a sliding cavity Q extending along a longitudinal direction of the backrest bracket 110, and the sliding member 131 is inserted into the sliding cavity Q and slidably matched with the sliding cavity Q.
[0066] The sliding cavity Q provided on the backrest bracket 110 matches the sliding member 131. The sliding member 131 is slidably arranged on the backrest bracket 110 by being inserted into the sliding cavity Q. The sliding member 131 can be a sliding rod. Optionally, the sliding cavity Q is located at the upper portion of the backrest bracket 110, and the top end of the backrest bracket 110 is provided with a cavity opening Qk communicating with the sliding cavity Q. The cavity opening Qk matches the external contour of the sliding member 131, and the sliding member 131 is inserted into the sliding cavity Q through the cavity opening Qk. The extension length of the sliding cavity Q is not limited and can be set according to actual conditions.
[0067] When the backrest bracket 110 rotates, the sliding member 131 correspondingly slides along the sliding cavity Q. For example, when the user sits on the seat and leans back against the backrest, the backrest bracket 110 will rotate toward the rear side of the seat on the base 200. At this time, the sliding member 131 slides downward along the sliding cavity Q of the backrest bracket 110 (the sliding member 131 continues to slide into the sliding cavity Q at the cavity opening Qk) to drive the backrest main body 120 to move downward as a whole or locally, so as to adjust the position and / or angle of the backrest main body 120. Or when the user changes the posture from leaning back to sitting upright, the backrest bracket 110 rotates toward a front side of the seat on the base, and at this time, the sliding member 131 slides upward along the sliding cavity Q of the backrest bracket 110 (the sliding member 131 slides within the sliding cavity Q toward the outside of the cavity opening Qk) to drive the backrest main body 120 to move upward as a whole or locally, so as to adjust the position and / or angle of the backrest main body 120.
[0068] The sliding member 131 is slidably arranged on the backrest bracket 110 by being inserted into the sliding cavity Q provided on the backrest bracket 110, so that the sliding member 131 does not additionally occupy a thickness space along a front-rear direction of the seat and does not additionally occupy a width space along a left-right direction of the seat.
[0069] In some embodiments, a sliding structure is provided on at least one of the backrest bracket 110 and the sliding member 131 for supporting the sliding member 131 to slide along the sliding cavity Q.
[0070] The sliding member 131 slides along the sliding cavity Q with the support of the sliding structure. The sliding structure can be arranged on the backrest bracket 110, on the sliding member 131, or on both of the backrest bracket 110 and the sliding member 131.
[0071] The sliding structure may include various structure. For example, the sliding structure may include a sliding groove, and the sliding member 131 is partially accommodated in the sliding groove to slide through the support of the sliding groove. This is only exemplary but not for limiting purpose. In a specific application, when either the backrest bracket 110 or the sliding member 131 is provided with the sliding structure, the structural form of the sliding structure may use, but is not limited to, any above structure.
[0072] With the support of the sliding structure, the sliding member 131 can slide smoothly along the sliding cavity Q, which is beneficial to improving the operational stability of the backrest sliding system.
[0073] In some embodiments, referring to FIG. 3, the sliding structure includes at least one support member 10. The at least one support member 10 is rotatably arranged on one of the backrest bracket 110 and the sliding member 131, and forms a rolling contact with the other of the backrest bracket 110 and the sliding member 131.
[0074] The sliding structure employs the support member 10. The support member 10 is rotatably installed on the setting object (the backrest bracket 110 or the sliding member 131) and arranged on a wall of the setting object to contact the other object. Optionally, at least one support member 10 is rotatably arranged on the backrest bracket 110 and located on an inner wall of the sliding cavity Q to form a rolling contact with the sliding member 131.
[0075] At least one support member 10 is provided, that is, one or more support members 10 (such as two or three) can be set. When more than one support member 10 is provided, the plurality of support members 10 can be spaced from each other along the circumferential, transverse, or longitudinal direction of the setting object. Optionally, the support member 10 may include a support wheel connected to a mounting shaft. The wall of the setting object is provided with a mounting groove, and the support wheel is at least partially accommodated in the mounting groove and rotatably arranged on the wall of the setting object through the mounting shaft.
[0076] When the sliding member 131 slides along the sliding cavity Q, the support member 10 in contact with the sliding member 131 or the backrest bracket 10 correspondingly rotates. That is, the support member 10 rolls along the surface of the sliding member 131 or the backrest bracket 110 to support the sliding member 131 to slide along the sliding cavity Q. The provided support member 10 can greatly reduce a frictional resistance between the backrest bracket 110 and the sliding member 131, allowing the sliding operation of the sliding member 131 easier and the sliding process smoother.
[0077] Optionally, at least one support member 10 is rotatably arranged on one of the backrest bracket 110 and the sliding member 131, and another one of the backrest bracket 110 and the sliding member 131 is provided with a sliding groove extending along its longitudinal direction. The support member 10 is accommodated in the sliding groove and forms a rolling contact with the bottom wall of the sliding groove. The sliding groove provides a clear movement track for the support member 10, ensuring that the support member 10 moves along a predetermined direction and achieving precise guidance for the sliding of the sliding member 131.
[0078] Optionally, both of the backrest bracket 110 and the sliding member 131 are provided with support members 10. The support members 10 on the backrest bracket 110 are located on the inner wall of the sliding cavity Q and adjacent to the cavity opening Qk, and the support members 10 on the sliding member 131 are located at the bottom. This structural layout ensures that the sliding member 131 is balanced during sliding, not easy to get stuck, and the sliding smoothness of the sliding member 131 is guaranteed.
[0079] In some embodiments, referring to FIGS. 1, 4 and 5, the first transmission assembly 130 further includes a first support member 132, which is rotatably connected to the sliding member 131. The sliding member 131 is in transmission connection with the backrest main body 120 through the first support member 132.
[0080] The first support member 132 is arranged between the sliding member 131 and the backrest main body 120. The first support member 132 supports the backrest main body 120, and in addition, the first support member 132 also establishes a transmission connection between the sliding member 131 and the backrest main body 120, allowing a force transmission between the sliding member 131 and the backrest main body 120 through the first support member 132. For example, when the sliding member 131 slides on the backrest bracket 110, the first support member 132 correspondingly drives the backrest main body 120 to slide relative to the backrest bracket 110.
[0081] The first support member 132 is rotatably connected to the sliding member 131, forming a mutually rotatable connection. Additionally, the first support member 132 is connected to the backrest main body 120, which can be a direct connection or through an intermediate component, and the connection manner (such as rotational connection or sliding connection) is not limited in the embodiment. When the user leans against the backrest main body 120, the backrest main body 120 is subjected to the force applied by the user. When the posture of the user changes, the force on the backrest main body 120 (such as magnitude, direction, position, etc. ) changes accordingly and is transmitted to the first support member 132, causing the first support member 132 to drive the backrest main body 120 to rotate relative to the sliding member 131. The backrest main body 120 adaptively adjusts its angle and / or position to closely fit the human body and provide support, with good fitting and support performance, which is beneficial to improving the comfort of the user when using the seat.
[0082] The connection structure between the first support member 132 and the sliding member 131 can adopt the following two forms.
[0083] Firstly, the sliding member 131 is provided with a backrest connection portion. A connection shaft is inserted into the backrest connection portion. The first support member 132 is connected to the connection shaft to form a hinge (i.e., rotational connection) with the backrest connection portion, so that the first support member 132 can rotate relative to the sliding member 131 through the connection shaft.
[0084] Secondly, the sliding member 131 is provided with a backrest connection portion. The backrest connection portion is provided with a sliding hole. A sliding shaft is inserted into the sliding hole, and the first support member 132 is connected to or integrally formed with the sliding shaft to form both a rotational connection and a sliding connection with the backrest connection portion. Thus, the first support member 132 can rotate relative to the sliding member 131 through the sliding shaft and can also slide relative to the sliding member 131. In this way, when the backrest main body 120 moves relative to the sliding member 131, the position and / or angle of the backrest main body 120 changes diversely, enabling the backrest main body 120 to fit the human body more closely and provide sufficient support. The above two structural settings are only exemplary but not for limiting purpose, and include but are not limited to these.
[0085] Optionally, the first support member 132 has two support portions that are oppositely arranged. The two support portions are respectively located on the opposite sides of the first support member 132 and connected to the backrest main body 120. The two support portions on the opposite sides of the first support member 132 may extend in a direction perpendicular to the first support member 132, and the first support member 132 and the two support portions arranged thereon form an “H” -shaped component. In addition, the support portion may also be a non-extending structure, such as a square, circular, or triangular shape. The support portion can be directly connected to the backrest main body 120 or connected to the backrest main body 120 through other intermediate components.
[0086] Optionally, the support portion is movably connected to the backrest main body 120, and the form of the movable connection includes rotational connection, sliding connection, elastic connection, etc., which is not limited in the embodiment. Due to the movable connection between the support portion and the backrest main body 120, the backrest main body 120 is allowed to move relative to the first support member 132 to adjust according to different body shapes and / or postures, thereby adapting to the body shape and posture and providing support and cushioning functions.
[0087] In some embodiments, referring to FIGS. 4 to 8, the first transmission assembly 130 further includes at least two sets of second support members 133, which are respectively arranged on the opposite sides of the first support member 132.
[0088] Each set of second support members 133 includes at least one second support member 133. Each second support member 133 is movably connected to the first support member 132, and the first support member 132 is movably connected to the backrest main body 120 through at least two sets of second support members 133.
[0089] Specifically, besides the sliding member 131 and the first support member 132, the first transmission assembly 130 further includes at least two sets of second support members 133 respectively arranged on the opposite sides of the first support member 132. The second support members 133 are located between the first support member 132 and the backrest main body 120 and are respectively movably connected to the first support member 132 and the backrest main body 120. The form of the movable connection can refer to any one of the two structural settings of the connection between the first support member 132 and the sliding member 131 in the foregoing embodiments, including but not limited to these.
[0090] As shown in FIGS. 8 and 9, the connection structure between the second support member 133 and the first support member 132 can be as follows. The first support member 132 is provided with a first sliding track 1321, a first sliding column 1331 is inserted into the first sliding track 1321, and the second support member 133 is connected to or integrally formed with the first sliding column 1331, to form both a rotational connection and a sliding connection with the first support member 132. Thus, the second support member 133 can rotate relative to the first support member 132 through the first sliding column 1331 and can also slide relative to the first support member 132. In this way, when the backrest main body 120 moves relative to the first support member 132, the position and / or angle of the backrest main body 120 changes diversely, enabling the backrest main body 120 to fit the human body more closely and provide sufficient support.
[0091] One or more second support member (s) 133 can be correspondingly arranged at each side of the opposite sides of the first support member 132, and each second support member 133 is movably connected to the backrest main body 120. Through the movable connection arrangement of the second support members 133 between the first support member 132 and the backrest main body 120, the relative movement between the backrest main body 120 and the first support member 132 is more flexible, so that the backrest main body 120 can better fit the human body curve and provide more comfortable support.
[0092] In some embodiments, referring to FIGS. 5 to 9, one of the backrest main body 120 and the second support member 133 is provided with a first accommodation cavity Q1, and another one of the backrest main body 120 and the second support member 133 is provided with a first fitting member J1. The first fitting member J1 is accommodated in the first accommodation cavity Q1 to enable the second support member 133 to be movably connected to the backrest main body 120.
[0093] Specifically, the backrest main body 120 may be provided with a first accommodation cavity Q1, and the second support member 133 is provided with a first fitting member J1. The second support member 133 is movably connected to the backrest main body 120 through the first fitting member J1 accommodated in the first accommodation cavity Q1 of the backrest main body 120. Or the second support member 133 is provided with a first accommodation cavity Q1, and the backrest main body 120 is provided with a first fitting member J1. The backrest main body 120 is movably connected to the second support member 133 through the first fitting member J1 accommodated in the first accommodation cavity Q1 of the second support member 133.
[0094] The first fitting member J1 can be a ball connector, an elastic member (such as a spring) , flexible silica gel, etc., which is not limited in the embodiment. When the first fitting member J1 is a ball connector, the ball connection end of the ball connector is accommodated in the first accommodation cavity Q1 and can move and / or rotate in the first accommodation cavity Q1.
[0095] The movable connection between the first fitting member J1 and the backrest main body 120 allows the backrest main body 120 to rotate and / or move in plurality of directions relative to the second support member 133, overcoming the limitations of traditional fixed connections and enabling the backrest main body 120 to adjust according to the posture of the user.
[0096] Taking the first fitting member J1 as a ball connector as an example, when the user leans against the backrest main body 120, the first fitting member J1 can move in the first accommodation cavity Q1. The change in the leaning backward or lying posture of the user causes the first fitting member J1 to move and / or rotate in the first accommodation cavity Q1, so that the backrest main body 120 correspondingly adjusts the angle and / or position relative to the second support member 133, enabling the backrest main body 120 to adapt to the human body curve during the user's backward leaning or lying and improve the comfort of support.
[0097] In some embodiments, referring to FIGS. 1 and 2, the second transmission assembly 140 includes a rotating member 141. One end of the rotating member 141 is rotatably connected to the backrest bracket 110, and the other end of the rotating member 141 is in transmission connection with the backrest main body 120. The rotating member 141 is installed on the backrest bracket 110 and can rotate on the backrest bracket 110. Specifically, the rotating member 141 can adopt structural forms such as a rotating rod, a rotating frame, and a connecting rod to form a rotational connection with the backrest bracket 110, achieving a rotatable arrangement on the backrest bracket 110. On the backrest bracket 110, the rotating member 141 can be arranged at a lower portion of the backrest bracket 110 to correspond to the lower half of the backrest main body 120 (which can also be regarded as the portion of the backrest for supporting the human waist) . The backrest main body 120 and the rotating member 141 are in a transmission connection. Through the rotating member 141, the backrest main body 120 can rotate relative to the backrest bracket 110, and the rotating member 141 correspondingly supports the rotation of the backrest main body 120 on the backrest bracket 110.
[0098] The rotation of the rotating member 141 can be actuated in the following ways. The user leans against the backrest main body 120. When the user leans backward, the force applied to the backrest main body 120 increases, and the force received by the backrest main body 120 is simultaneously applied to the rotating member 141 and the backrest bracket 110, so that the backrest bracket 110 correspondingly rotates backward, and at the same time, the rotating member 141 rotates on the backrest bracket 110, thereby supporting the backrest main body 120 to rotate relative to the backrest bracket 110.
[0099] That is, when the backrest bracket 110 rotates relative to the base, the backrest main body 120 rotates on the backrest bracket 110 through the rotating member 141.
[0100] In the embodiment, when the user sits on the seat and leans backward against the backrest main body 120, the backrest main body 120 and the backrest bracket 110 will rotate relative to the base 200, and at the same time, the rotating member 141 will rotate on the backrest bracket 110 (for example, one end of the rotating member 141 connected to the backrest main body 120 rotates downward) to drive the backrest main body 120 to move (for example, move toward the base) to adjust the position and / or angle of the backrest main body 120, so that the backrest main body 120 follows the body part (such as the back) of the user to provide support, adapts to the posture change of the user, and improves the comfort of the user using the seat.
[0101] In some embodiments, referring to FIGS. 4 to 7, the second transmission assembly 140 further includes a third support member 142. The third support member 142 is rotatably connected to the rotating member 141, and the rotating member 141 is in transmission connection with the backrest main body 120 through the third support member 142.
[0102] The third support member 142 is arranged between the rotating member 141 and the backrest main body 120. The third support member 142 supports the backrest main body 120, and in addition, the third support member 142 also establishes a transmission connection between the rotating member 141 and the backrest main body 120, allowing force transmission between the rotating member 141 and the backrest main body 120 through the third support member 142. For example, when the rotating member 141 rotates on the backrest bracket 110, the third support member 142 drives the backrest main body 120 to rotate relative to the backrest bracket 110.
[0103] The third support member 142 is rotatably connected to the rotating member 141, forming a mutually rotatable connection. Additionally, the third support member 142 is connected to the backrest main body 120, which can be a direct connection or through an intermediate component, and the connection manner (such as rotational connection or sliding connection) is not limited in the embodiment. When the user leans against the backrest main body 120, the backrest main body 120 is subjected to the force applied by the user. When the posture of the user changes, the force on the backrest main body 120 (such as magnitude, direction, position, etc. ) changes accordingly and is transmitted to the third support member 142, causing the third support member 142 to drive the backrest main body 120 to rotate relative to the rotating member 141. The backrest main body 120 adaptively adjusts its angle and / or position to closely fit the human body and provide support, so that the backrest main body 120 has good fitting and support performance, which is beneficial to improving the comfort of the user when using the seat.
[0104] The connection structure between the third support member 142 and the rotating member 141 can adopt the following two forms.
[0105] Firstly, the rotating member 141 is provided with a backrest connection portion. A connection shaft is inserted into the backrest connection portion. The third support member 142 is connected to the connection shaft to form a hinge (i.e., rotational connection) with the backrest connection portion, so that the third support member 142 can rotate relative to the rotating member 141 through the connection shaft.
[0106] Secondly, the rotating member 141 is configured with a backrest connection portion. The backrest connection portion is provided with a sliding hole. A sliding shaft is inserted into the sliding hole, and the third support member 142 is connected to the sliding shaft to form both a hinge (i.e., rotational connection) and a sliding connection with the backrest connection portion. Thus, the third support member 142 can rotate relative to the rotating member 141 through the sliding shaft and can also slide relative to the rotating member 141. In this way, when the backrest main body 120 moves relative to the third support member 142, the position and / or angle of the backrest main body 120 changes diversely, enabling the backrest main body 120 to fit the human body more closely and provide sufficient support. The above two structural settings are only exemplary but not for limiting purpose, and include but are not limited to these.
[0107] Wherein, taking the first support member 132 as a reference, the third support member 142 can also be correspondingly provided with support portions, and the specific structural settings refer to the above embodiments, which will not be repeated here.
[0108] In some embodiments, referring to FIG. 4, the second transmission assembly 140 further includes at least two sets of fourth support members 143, which are respectively arranged on opposite sides of the third support member 142.
[0109] Each set of fourth support members 143 includes at least one fourth support member 143. Each fourth support member 143 is movably connected to the third support member 142, and the third support member 142 is movably connected to the backrest main body 120 through at least two sets of fourth support members 143.
[0110] Specifically, besides the rotating member 141 and the third support member 142, the second transmission assembly 140 further includes at least two sets of fourth support members 143 respectively arranged on opposite sides of the third support member 142. The fourth support members 143 are located between the third support member 142 and the backrest main body 120, and respectively movably connected to the third support member 142 and the backrest main body 120. The form of the movable connection can refer to any one of the two structural settings of the connection between the third support member 142 and the rotating member 141 in the foregoing embodiments, including but not limited to these.
[0111] The connection structure between the fourth support member 143 and the third support member 142 may be the follows. The third support member 142 is configured with a second sliding track, a second sliding column is inserted into the second sliding track, and the fourth support member 143 is connected to or integrally formed with the second sliding column to form both a rotational connection and a sliding connection with the third support member 142. Thus, the fourth support member 143 can rotate relative to the third support member 142 through the second sliding column and can also slide relative to the third support member 142. In this way, when the backrest main body 120 moves relative to the third support member 142, the position and / or angle of the backrest main body 120 changes diversely, enabling the backrest main body 120 to fit the human body more closely and provide sufficient support.
[0112] One or more fourth support member (s) 143 can be correspondingly arranged at each side of the opposite sides of the third support member 142, and each fourth support member 143 is movably connected to the backrest main body 120. Through the movable connection arrangement of the fourth support members 143 between the third support member 142 and the backrest main body 120, the relative movement between the backrest main body 120 and the third support member 142 is more flexible, so that the backrest main body 120 can better fit the human body curve and provide more comfortable support.
[0113] In some embodiments, referring to FIGS. 6, 7 and 10, one of the backrest main body 120 and the fourth support member 143 is provided with a second accommodation cavity Q2, and another one of the backrest main body 120 and the fourth support member 143 is provided with a second fitting member J2. The second fitting member J2 is accommodated in the second accommodation cavity Q2 to enable the fourth support member 143 to be movably connected to the backrest main body 120.
[0114] Specifically, the backrest main body 120 may be provided with a second accommodation cavity Q2, and the fourth support member 143 is provided with a second fitting member J2. The fourth support member 143 is movably connected to the backrest main body 120 through the second fitting member J2 accommodated in the second accommodation cavity Q2 of the backrest main body 120. Or the fourth support member 143 is provided with a second accommodation cavity Q2, and the backrest main body 120 is provided with a second fitting member J2. The backrest main body 120 is movably connected to the fourth support member 143 through the second fitting member J2 accommodated in the second accommodation cavity Q2 of the fourth support member 143.
[0115] The second fitting member J2 can be a ball connector, an elastic member (such as a spring) , flexible silica gel, etc., which is not limited in the embodiment. When the second fitting member J2 is a ball connector, the ball connection end of the ball connector is accommodated in the second accommodation cavity Q2 and can move and / or rotate in the second accommodation cavity Q2.
[0116] The movable connection between the second fitting member J2 and the backrest main body 120 allows the backrest main body 120 to rotate and / or move in plurality of directions relative to the fourth support member 143, overcoming the limitations of traditional fixed connections and enabling the backrest main body 120 to adjust according to the posture of the user.
[0117] Taking the second fitting member J2 as a ball connector as an example, when the user leans against the backrest main body 120, the second fitting member J2 can move in the second accommodation cavity Q2. The change in the leaning backward or lying posture of the user causes the second fitting member J2 to move and / or rotate in the second accommodation cavity Q2, so that the backrest main body 120 correspondingly adjusts the angle and / or position relative to the fourth support member 143, enabling the backrest main body 120 to adapt to the human body curve during the user's backward leaning or lying and improve the comfort of support.
[0118] In some embodiments, referring to FIG. 2, the backrest assembly 100 further includes a first linkage member 151. One end of first linkage member 151 is hinged to the first transmission assembly 130, and the other end of the first linkage member 151 is hinged to the second transmission assembly 140. In the embodiment, through the first linkage member 151, a stable linkage relationship is formed between the first transmission assembly 130 and the second transmission assembly 140, that is, the second transmission assembly 140, the first linkage member 151 and the first transmission assembly 130 have a mutually cooperative action mechanism. For example, when the backrest bracket 110 rotates relative to the base or the movement of the backrest main body 120 relative to the backrest bracket 110 drives the second transmission assembly 140 to move, the second transmission assembly 140 drives the first transmission assembly 130 to move through the first linkage member 151.
[0119] In combination with the above embodiments, based on the structural composition of the first transmission assembly 130 and the second transmission assembly 140, optionally, one end of the first linkage member 151 is hinged to the sliding member 131, and the other end of the first linkage member 151 is hinged to the rotating member 141. The first linkage member 151 can be a first linkage rod 151. Taking this as an example, when the user leans backward against the backrest main body 120, the backrest bracket 110 rotates toward the rear side of the seat, the rotating member 141 correspondingly rotates and drives the first linkage rod 151 to move, and the first linkage rod 151 pulls the sliding member 131 to move downward from the initial position. When the user changes the posture from backward leaning to sitting upright, the backrest bracket 110 rotates toward the front side of the seat, the rotating member 141 correspondingly rotates and drives the first linkage rod 151 to move, and the first linkage rod 151 drives the sliding member 131 to move upward to return to the initial position.
[0120] In some embodiments, referring to FIGS. 1 and 2, the backrest assembly 100 further includes a second linkage member 152. One end of the second linkage member 152 is hinged to the second transmission assembly 140, and the other end of the second linkage member 152 is hinged to the base 200 of the seat. In the embodiment, since the second transmission assembly 140 is movably connected to the backrest main body 120 and the backrest bracket 110, the backrest main body 120, the second transmission assembly 140, and the backrest bracket 110 form a free mechanism. By further setting the second linkage member 152 as the support foundation of the second transmission assembly 140 or the backrest main body 120, when the backrest main body 120 and / or the backrest bracket 110 is not subjected to external force, the second transmission assembly 140 or the backrest main body 120 can maintain a stable state relative to the base 200, so that the backrest main body 120, the second transmission assembly 140, the backrest bracket 110, and the second linkage member 152 form a stable linkage mechanism. Moreover, the second linkage member 152 simultaneously forms a linkage relationship with the second transmission assembly 140, and there is a mutually cooperative action mechanism between the second linkage member 152 and the second transmission assembly 140. When the backrest bracket 110 rotates relative to the base 200 or the movement of the backrest main body 120 relative to the backrest bracket 110 drives the second transmission assembly 140 to move, the second transmission assembly 140 can move relative to the base 200 through the second linkage member 152. In this process, the second linkage member 152 correspondingly moves and supports the second transmission assembly 140, thereby supporting the backrest main body 120.
[0121] In combination with the above embodiments, based on the structural composition of the second transmission assembly 140, optionally, one end of the second linkage member 152 is hinged to the rotating member 141, and the other end of the second linkage member 152 is hinged to the base 200. The second linkage member 152 can be a second linkage rod 152.
[0122] In some embodiments, referring to FIGS. 6 and 7, the backrest main body 120 is provided with a plurality of openings K. The plurality of openings K are located on side edges of the backrest main body 120 along a transverse direction of the backrest main body 120, and each opening K extends from the edge of the side where the opening K is located toward the other side. Specifically, in the transverse direction of the backrest main body 120 (which can also be regarded as the left-right direction of the backrest main body 120) , the openings K are located on the side edges of the backrest main body 120 and extend toward the opposite side. Optionally, the opening K is a strip-shaped opening. The number of openings K is multiple, that is, two or more openings K can be set. The specific number can be set according to actual needs, and the extension lengths of the openings K can be the same or different, which is not limited in the embodiment. As an example, the left side of the backrest main body 120 has at least one first opening extending toward the right side; and / or the right side of the backrest main body 120 has at least one second opening extending toward the left side.
[0123] The plurality of openings K are divided into two groups, and the two groups of openings K are oppositely arranged along the transverse direction of the backrest main body 120, and each group of openings K includes at least one opening K.
[0124] For ease of understanding, the two groups of openings K can be divided into a group of first openings and a group of second openings. In the transverse direction of the backrest main body 120, a group of first openings are located on the left side of the backrest main body 120, a group of second openings are located on the right side of the backrest main body 120, and the first openings and the second openings are oppositely arranged.
[0125] A group of first openings can include one first opening or a plurality of (two or more) first openings. When there are plurality of first openings, the plurality of first openings are sequentially spaced along the longitudinal direction of the backrest main body 120. For example, seven first openings are sequentially spaced along the longitudinal direction of the left side of the backrest main body 120.
[0126] A group of second openings can include one second opening or a plurality of (two or more) second openings. When there are plurality of second openings, the plurality of second openings are sequentially spaced along the longitudinal direction of the backrest main body 120. For example, seven second openings are sequentially spaced along the longitudinal direction of the right side of the backrest main body 120.
[0127] Optionally, the number of first openings is the same as that of second openings and the positions correspond.
[0128] Due to the presence of the openings K, when the user leans against the backrest main body 120, the backrest main body 120 can undergo adaptive deformation according to the user's body curve to fit the body part of the user and provide sufficient support, adapting to different user body shapes or sitting posture changes.
[0129] In some embodiments, referring to FIGS. 6 and 7, the backrest main body 120 includes a plurality of support ribs 121. Two of the plurality of support ribs 121 are spaced from each other along the longitudinal direction of the backrest main body 120. Two of the plurality of support ribs 121 define one of the plurality of openings K therebetween.
[0130] The support ribs 121 are generally strip-shaped or plate-shaped, and can be used as independent components or integrated with other structures. A plurality of support ribs 121 (two or more) are provided, and the plurality of support ribs 121 are sequentially spaced along the longitudinal direction of the backrest main body 120. The number of support ribs 121 can be set according to actual needs, such as eight, which is not limited in the embodiment. In addition, in the transverse direction of the backrest main body 120, the support ribs 121 can be arranged on one side, for example, a plurality of support ribs 121 are arranged on the left side or the right side of the backrest main body 120; or the support ribs 121 can be arranged on both sides, for example, a plurality of support ribs 121 are arranged on the left side and the right side of the backrest main body 120. Since the shapes and sizes (such as length, width, etc. ) of the support ribs 121 are different, they can better fit body parts of the user and provide personalized support for users of different body types.
[0131] Since the support ribs 121 are spaced, the gap between any two adjacent support ribs 121 forms the opening K. The size of the opening K can be determined by setting the spacing between the support ribs 121. The support ribs 121 can be connected, that is, there is a structural connection, or not connected. When the support ribs 121 are not connected, the support ribs 121 can form a structural connection through the connection with the transmission assembly (the first transmission assembly 130 and / or the second transmission assembly 140) , which is not limited in the embodiment.
[0132] As an example, any two adjacent support ribs 121 are connected by a connection portion 122. Specifically, a connection portion 122 is formed between two adjacent support ribs 121, and the connection portion 122 can be integrally formed with the support ribs 121 to connect the two adjacent support ribs 121. The connected support ribs 121 form an integral frame of the backrest main body 120, which improves the structural strength and support of the backrest main body 120. Moreover, the connection of the support ribs 121 through the connection portion 122 enables the pressure to be more evenly distributed throughout the backrest main body 120. Between two adjacent support ribs 121, one or more (two or more) connection portion (s) 122 can be provided, and the plurality of connection portions 122 are spaced along the transverse direction of the backrest main body 120, which is not limited in the embodiment.
[0133] When the user leans against the backrest main body 120, if the leaning posture changes, due to the spaced rib structure design of the backrest main body 120, the backrest main body 120 will undergo adaptive deformation with good deformation effect, providing the user with a better flexible support effect.
[0134] An embodiment of the present disclosure further provides a seat, which includes a base 200 and the backrest assembly 100 of the seat as described in the foregoing embodiments. The backrest bracket 110 is connected to the base 200. The connection manner between the backrest bracket 110 and the base 200 includes a fixed connection or a rotatable connection. The specific structure of the backrest assembly 100 of the seat refers to the above embodiments. Since the seat adopts all the technical solutions of the above embodiments, it has at least all the technical effects brought by the technical solutions of the above embodiments, which will not be repeated here.
[0135] The above are only partial or preferred embodiments of the present disclosure, and neither the text nor the drawings can limit the protection scope of the present disclosure. Any equivalent structural transformation made by using the contents of the specification and drawings of the present disclosure under the overall concept of the present disclosure, or direct / indirect disclosure in other related technical fields, shall be included in the protection scope of the present disclosure.
Claims
1.A backrest assembly (100) of a seat, comprising:a backrest bracket (110) configured to be connected to a base (200) of the seat;a backrest main body (120) arranged on one side of the backrest bracket (110) ;a first transmission assembly (130) arranged between the backrest bracket (110) and the backrest main body (120) , the first transmission assembly (130) being in transmission connection with the backrest main body (120) ; anda second transmission assembly (140) arranged between the backrest bracket (110) and the backrest main body (120) and spaced from the first transmission assembly (130) along a longitudinal direction of the backrest bracket (110) , the second transmission assembly (140) being in transmission connection with the backrest main body (120) ;Wherein, the first transmission assembly (130) is slidably connected to the backrest bracket (110) , and the second transmission assembly (140) is rotatably connected to the backrest bracket (110) , so that the backrest main body (120) is configured to move relative to the backrest bracket (110) when the backrest assembly (100) is subjected to an external force.2.The backrest assembly (100) according to claim 1, wherein the first transmission assembly (130) comprises:a sliding member (131) slidably arranged on the backrest bracket (110) and in transmission connection with the backrest main body (120) .3.The backrest assembly (100) according to claim 2, wherein the backrest bracket (110) is provided with a sliding cavity (Q) extending along the longitudinal direction, and the sliding member (131) is inserted into the sliding cavity (Q) and configured to slide along the sliding cavity (Q) .4.The backrest assembly (100) according to claim 3, wherein a sliding structure is provided on at least one of the backrest bracket (110) and the sliding member (131) for supporting the sliding member (131) when the sliding member (131) slides along the sliding cavity (Q) .5.The backrest assembly (100) according to claim 4, wherein the sliding structure comprises at least one support member (10) rotatably arranged on one of the backrest bracket (110) and the sliding member (131) , and is in a rolling contact with another one of the backrest bracket (110) and the sliding member (131) .6.The backrest assembly (100) according to any one of claims 2 to 5, wherein the first transmission assembly (130) further comprises:a first support member (132) rotatably connected to the sliding member (131) , the sliding member (131) being in transmission connection with the backrest main body (120) through the first support member (132) .7.The backrest assembly (100) according to claim 6, wherein the first transmission assembly (130) further comprises:at least two sets of second support members (133) respectively arranged on opposite sides of the first support member (132) ;wherein each of the at least two sets of the second support members (133) comprises at least one second support member (133) , each second support member (133) is movably connected to the first support member (132) , and the first support member (132) is movably connected to the backrest main body (120) through the at least two sets of second support members (133) .8.The backrest assembly (100) according to claim 7, wherein one of the backrest main body (120) and the second support member (133) is provided with a first accommodation cavity (Q1) , another one of the backrest main body (120) and the second support member (133) is provided with a first fitting member (J1) , the first fitting member (J1) is accommodated in the first accommodation cavity (Q1) to enable the second support member (133) to be movably connected to the backrest main body (120) .9.The backrest assembly (100) according to any one of claims 1 to 8, wherein the second transmission assembly (140) comprises:a rotating member (141) , one end of the rotating member (141) being rotatably connected to the backrest bracket (110) , and another end of the rotating member (141) being in transmission connection with the backrest main body (120) .10.The backrest assembly (100) according to claim 9, wherein the second transmission assembly (140) further comprises:a third support member (142) rotatably connected to the rotating member (141) , the rotating member (141) being in transmission connection with the backrest main body (120) through the third support member (142) .11.The backrest assembly (100) according to claim 10, wherein the second transmission assembly (140) further comprises:at least two sets of fourth support members (143) respectively arranged on opposite sides of the third support member (142) ;wherein each of the at least two sets of fourth support members (143) comprises at least one fourth support member (143) , the at least one fourth support member (143) is movably connected to the third support member (142) , and the third support member (142) is movably connected to the backrest main body (120) through the at least two sets of fourth support members (143) .12.The backrest assembly (100) according to claim 11, wherein one of the backrest main body (120) and the at least one fourth support member (143) is provided with a second accommodation cavity (Q2) , and another one of the backrest main body (120) and the at least one fourth support member (143) is provided with a second fitting member (J2) , the second fitting member (J2) is accommodated in the second accommodation cavity (Q2) to enable each of the at least one fourth support member (143) to be movably connected to the backrest main body (120) .13.The backrest assembly (100) according to any one of claims 1 to 12, further comprising:a first linkage member (151) , one end of the first linkage member (151) is hinged to the first transmission assembly (130) , and another end of first linkage member (151) is hinged to the second transmission assembly (140) .14.The backrest assembly (100) according to any one of claims 1 to 13, further comprising:a second linkage member (152) , one end of the second linkage member (152) is hinged to the second transmission assembly (140) , and another end of the second linkage member (152) is hinged to the base (200) of the seat.15.The backrest assembly (100) according to any one of claims 1 to 14, wherein the backrest main body (120) is provided with a plurality of openings (K) , the plurality of openings (K) is located on two side edges of the backrest main body (120) opposite to each other along a transverse direction of the backrest main body (120) , and each of the plurality of openings (K) extends from one of the two side edges of where the each of the plurality of openings (K) is located toward another one of the two side edges.16.The backrest assembly (100) according to claim 15, wherein the backrest main body (120) comprises:a plurality of support ribs (121) , two of the plurality of support ribs (121) spaced from each other along the longitudinal direction of the backrest main body (120) , and two of the plurality of support ribs (121) defining one of the plurality of openings (K) therebetween.17.A seat, comprising a base (200) and the backrest assembly (100) according to any one of claims 1 to 16, wherein the backrest bracket (110) is connected to the base (200) .