Backrest assembly and seat

Abstract

The utility model discloses a backrest assembly and a seat. The backrest assembly comprises a backrest assembly, a backrest assembly and a backrest assembly, the waist support assembly is connected with the backrest assembly and is positioned below the backrest assembly; the seat comprises a backrest assembly and an adjusting assembly, the adjusting assembly is arranged between the backrest assembly and a back plate of the seat, the adjusting assembly comprises an adjusting part, and the length of the adjusting part can be adjusted so as to adjust the angle between the backrest assembly and the back plate. According to the backrest assembly disclosed by the utility model, the adjusting piece is arranged between the backrest assembly and the back plate, and the angle of the backrest relative to the base assembly is adjusted by changing the length of the adjusting piece, so that personalized supporting experience is provided for a user, the use flexibility of a seat is improved, and a good sitting posture can be kept in a working state or a resting state; the problems of muscle tension and fatigue caused by sedentariness can be relieved, and the stability and durability of the backrest assembly are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of seat manufacturing, in particular to a backrest assembly and a seat. Background Art

[0002] Related art indicates that existing chair structures often utilize fixed support designs, lacking adaptive support for various parts of the user's body. This can lead to discomfort or fatigue after prolonged use. These chairs cannot be adjusted to the user's body shape and posture, limiting their comfort and applicability. Alternatively, they require manual adjustments and fail to meet the individual needs of different users for back support position and strength. Existing chairs also have complex or manual adjustments for lumbar support and backrests, failing to automatically adapt to the user's waist and back curves, potentially causing discomfort with prolonged use. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a backrest assembly that can continuously provide support for the back.

[0004] The utility model also provides a seat with the backrest assembly.

[0005] The backrest assembly according to the first aspect of the present invention is provided on a seat, and the backrest assembly includes: a backrest component; a lumbar support component, the lumbar support component is connected to the backrest component and is located below the backrest component; an adjustment component, the adjustment component is provided between the backrest component and the backboard of the seat, the adjustment component includes an adjustment member, the length of the adjustment member is adjustable to adjust the angle between the backrest component and the backboard.

[0006] According to the backrest assembly of the utility model, an adjustment member is provided between the backrest component and the backboard, and the length of the adjustment member is changed to adjust the angle of the backrest relative to the base component, thereby providing the user with a personalized support experience, improving the flexibility of seat use, and allowing the user to maintain a good sitting posture whether at work or at rest, helping to reduce muscle tension and fatigue caused by sitting for long periods of time, and ensuring the stability and durability of the backrest assembly.

[0007] In some embodiments, the adjustment assembly further includes: a connecting rod, the connecting rod being connected between the backrest assembly and the backboard, the backrest assembly being rotatably connected to the connecting rod, the backboard being rotatably connected to the connecting rod, the adjustment member being located below the connecting rod, and the adjustment member being rotatably connected to the backrest assembly.

[0008] In some embodiments, a first connecting hole is formed at one end of the connecting rod, and a second connecting hole is formed on the backrest assembly. The backrest assembly and the connecting rod are rotatably connected via a first connecting shaft passing through the first connecting hole and the second connecting hole. The other end of the connecting rod has a first through hole, and a second through hole is formed on the back plate. The connecting rod and the back plate are rotatably connected via a rotating shaft passing through the first through hole and the second through hole.

[0009] In some embodiments, a third connecting hole is formed on the adjusting member, and a fourth connecting hole is formed on the backrest assembly. The backrest assembly and the adjusting member are rotatably connected via a second connecting shaft passing through the third connecting hole and the fourth connecting hole, and the adjusting member drives the backrest assembly to rotate around the first connecting shaft.

[0010] In some embodiments, the backrest assembly includes: a backrest body and a fine-tuning member, wherein the fine-tuning member is arranged between the backboard and the backrest body, one end of the fine-tuning member is connected to the backboard, and the other end of the fine-tuning member is connected to the backrest body.

[0011] In some embodiments, a mounting platform is formed on the backrest body, a mounting groove is formed on the mounting platform, and the other end of the fine-tuning member is disposed in the mounting groove.

[0012] In some embodiments, the backrest assembly further includes: a locking member connected to the adjusting member and used to fix the length of the adjusting member.

[0013] In some embodiments, the adjusting member is a gas rod, and / or the fine-tuning member is a compression spring.

[0014] In some embodiments, the backrest assembly further includes: a backrest frame and a backrest mesh, a card slot is formed on the periphery of the backrest frame, the backrest mesh covers the backrest frame, and the backrest mesh is connected to the backrest frame by being clamped in the card slot by a clamping strip; the lumbar support assembly includes: a lumbar support frame and a lumbar support mesh, a card slot is formed on the periphery of the lumbar support frame, the lumbar support mesh covers the lumbar support frame, and the lumbar support mesh is connected to the lumbar support frame by being clamped in the card slot by a clamping strip.

[0015] The seat according to the second aspect of the present invention comprises: a base assembly, the base assembly comprising: a seat basin and a bottom plate, the seat basin being connected to the bottom plate and movable relative to the bottom plate; a back plate, the back plate being rotatably connected to the bottom plate, the seat basin moving relative to the bottom plate to drive the back plate to rotate; the backrest assembly according to the first aspect of the present invention, the backrest assembly being connected to the back plate, the back plate rotating to drive the backrest assembly to move.

[0016] According to the seat of the present invention, by providing the backrest assembly of the first aspect mentioned above, it is adapted to the needs of different users from the perspective of ergonomic principles, and can be adjusted to provide optimal support during use, thereby achieving adaptive support for the user's back of the seat, improving the comfort and applicability of the seat, and being able to effectively relieve discomfort or fatigue, meeting the personalized needs of different users.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a seat according to an embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 Schematic cross-section of the seat shown in FIG.

[0020] Reference numerals:

[0021] 10. Backrest assembly;

[0022] 1. Lumbar support assembly;

[0023] 2. Adjustment assembly; 21. Adjustment member; 22. Connecting rod; 23. First connecting shaft; 24. Second connecting shaft;

[0024] 3. Fine-tuning parts;

[0025] 4. Backrest assembly; 41. Rotating shaft; 42. Backrest body; 43. Mounting platform; 44. Backrest frame;

[0026] 20. Back panel;

[0027] 100, base assembly; 101, seat basin; 102, bottom plate; 103, first base connecting rod; 104, second base connecting rod; 105, base connecting rod;

[0028] 1001, first base connecting axis; 1002, second base connecting axis; 1003, third base connecting axis; 1004, fourth base connecting axis;

[0029] 1000. Seats. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] Reference below Figure 1 and Figure 2 The backrest assembly 10 according to the first embodiment of the present invention is described below.

[0032] like Figure 1 and Figure 2 As shown, the backrest assembly 10 according to the embodiment of the first aspect of the present utility model includes: a backrest component 4, a lumbar support component 1 and an adjustment component 2.

[0033] Specifically, the lumbar support assembly 1 is connected to the backrest assembly 4 and is located below the backrest assembly 4. The adjustment assembly 2 is located between the backrest assembly 4 and the backboard 20 of the seat 1000. The adjustment assembly 2 includes an adjustment member 21, the length of which is adjustable to adjust the angle between the backrest assembly 4 and the backboard 20. It can be understood that the adjustment assembly 2 is connected to the backrest assembly 4 and the backboard 20, and the length of the adjustment member 21 is changed to adjust the angle of the backrest relative to the base assembly 100. The overall structure is simple and the design is ingenious.

[0034] According to the backrest assembly 10 of the embodiment of the present invention, by setting an adjustment member 21 between the backrest component 4 and the backboard 20, the length of the adjustment member 21 is changed to adjust the angle of the backrest relative to the base component 100, thereby providing the user with a personalized support experience, improving the flexibility of seat use, and allowing the user to maintain a good sitting posture whether at work or at rest, helping to reduce muscle tension and fatigue caused by sitting for long periods of time, and ensuring the stability and durability of the backrest assembly 10.

[0035] In some embodiments of the present invention, Figure 2 As shown, the adjustment assembly 2 further includes a connecting rod 22, which is connected between the backrest assembly 4 and the back panel 20. The backrest assembly 4 and the connecting rod 22 are rotatably connected, and the back panel 20 is rotatably connected to the connecting rod 22. An adjustment member 21 is located below the connecting rod 22 and is rotatably connected to the backrest assembly 4. Thus, one end of the connecting rod 22 is connected to the backrest assembly 4, and the other end of the connecting rod 22 is connected to the back panel 20. This improves the flexibility of angle adjustment between the backrest assembly 4 and the back panel 20, providing a wide range of personalized adjustment space, allowing users to set the most suitable sitting posture according to their physical condition and personal preferences. The good support and adaptability help reduce back discomfort and other problems that may be caused by sitting for long periods of time.

[0036] Furthermore, a first connecting hole is formed at one end of the connecting rod 22, and a second connecting hole is formed on the backrest assembly 4. The backrest assembly 4 and the connecting rod 22 are rotatably connected via a first connecting shaft 23 that passes through the first and second connecting holes. The other end of the connecting rod 22 has a first through hole, and the back panel 20 is formed with a second through hole. The connecting rod 22 and the back panel 20 are rotatably connected via a rotating shaft 41 that passes through the first and second through holes. It will be understood that the rotatable connection between the backrest assembly 4 and the connecting rod 22 via the first connecting shaft 23 and the rotatable connection between the connecting rod 22 and the back panel 20 via the rotating shaft 41 can provide the user with continuous and comfortable back support, good stability, and high safety.

[0037] Furthermore, a third connecting hole is formed on the adjusting member 21, and a fourth connecting hole is formed on the backrest assembly 4. The backrest assembly 4 and the adjusting member 21 are rotatably connected via a second connecting shaft 24 that passes through the third and fourth connecting holes. The adjusting member 21 drives the backrest assembly 4 to rotate about the first connecting shaft 23. It will be understood that the rotatable connection between the backrest assembly 4 and the adjusting member 21 is achieved via the second connecting shaft 24, and the adjusting member 21 directly acts on the backrest assembly 4, thereby achieving fine adjustment of the backrest angle. The structure is stable, ensuring reliability for long-term use.

[0038] In some embodiments of the present invention, the backrest assembly 4 includes a backrest body 42 and a fine-tuning member 3. The fine-tuning member 3 is disposed between the backboard 20 and the backrest body 42. One end of the fine-tuning member 3 is connected to the backboard 20, and the other end of the fine-tuning member 3 is connected to the backrest body 42. Thus, the fine-tuning member 3 enables finer angle adjustment, providing a more comfortable experience for the user and further enhancing the functionality and comfort of the seat 1000.

[0039] Optionally, the fine-tuning member 3 may be in the following form:

[0040] Spring-loaded mechanism: Provides slight cushioning and support through springs or other elastic elements, allowing the backrest to move freely within a certain range and automatically adjust to the user's weight and posture;

[0041] Rack and pinion mechanism: uses the meshing relationship between gears and racks to precisely control angle changes, which can be operated by users through external controllers such as knobs or handles;

[0042] Hydraulic or gas lever: Similar to the height adjustment on an office chair, this uses hydraulic or gas pressure to smoothly change the backrest angle and usually has a locking mechanism to maintain the set position.

[0043] Linkage: Uses a series of links to transmit force and motion to achieve fine adjustment of the backrest angle.

[0044] Here, preferably, the fine-tuning member 3 is a compression spring.

[0045] In some embodiments of the present invention, Figure 2 As shown, a mounting platform 43 is formed on the backrest body 42, and a mounting slot is formed on the mounting platform 43. The other end of the fine-tuning member 3 is positioned within the mounting slot. When the fine-tuning member 3 is in operation, it pushes or pulls the backrest body 42, causing it to rotate about the first connecting axis 23, thereby changing the angle of the backrest relative to the backboard 20. Thus, one end of the fine-tuning member 3 is constrained within the mounting slot, ensuring that the backrest body 42 can move along a predetermined path during adjustment, providing a more stable and controllable adjustment effect.

[0046] In some embodiments of the present invention, the backrest assembly 10 further includes a locking member connected to the adjusting member 21 for fixing the length of the adjusting member 21. It will be appreciated that once the user has adjusted the backrest angle to a desired setting, the locking member locks the current length of the adjusting member 21 to prevent the backrest angle from changing. The locking member ensures the stability of the backrest assembly 4 in the set position, preventing angle changes due to external forces or prolonged use. Furthermore, the locking member is simple to operate, allowing the user to quickly adjust and lock the position.

[0047] Preferably, the adjusting member 21 is a gas rod. In addition, the adjusting member 21 can also be a hydraulic rod or a gear rack.

[0048] In some embodiments of the present invention, the backrest assembly 4 further comprises a backrest frame 44 and a backrest mesh. The backrest frame 44 is provided with a slot formed around its periphery. The backrest mesh covers the backrest frame 44 and is connected to the backrest frame 44 via a clip secured within the slot. The lumbar support assembly 1 further comprises a lumbar support frame and a lumbar support mesh. The lumbar support frame is provided with a slot formed around its periphery. The lumbar support mesh covers the lumbar support frame and is connected to the lumbar support frame via a clip secured within the slot. This provides a simple connection method, good air permeability, high comfort, long service life, and ease of cleaning and maintenance.

[0049] The seat 1000 according to the second embodiment of the present invention comprises: a base assembly 100 , a backboard 20 and a backrest assembly 10 according to the first embodiment of the present invention.

[0050] Specifically, the base assembly 100 includes a seat basin 101 and a base plate 102. The seat basin 101 is connected to the base plate 102 and can move relative to it. The back plate 20 is rotatably connected to the base plate 102. The seat basin 101 moves relative to the base plate 102 to drive the back plate 20 to rotate. The backrest assembly 10 is connected to the back plate 20, and the back plate 20 rotates to drive the backrest assembly 10 to move. When a user sits on the seat, the body's own weight causes the seat basin 101 to move downward and forward relative to the base plate 102, driving the back plate 20 forward, and thus the backrest assembly 10 forward. This enables the entire backrest assembly 10 to move forward, allowing it to be moved forward to different positions, realizing the adaptive function of the backrest lumbar support.

[0051] According to the seat 1000 of the embodiment of the utility model, by setting the backrest assembly 10 of the above-mentioned first aspect embodiment, it is considered from the principle of ergonomics to adapt to the needs of different users, and can be adjusted to provide optimal support during use, thereby realizing adaptive support of the user's back by the seat 1000, improving the comfort and applicability of the seat 1000, being able to effectively relieve discomfort or fatigue, and meeting the personalized needs of different users.

[0052] Furthermore, the seat basin 101 is connected to the back panel 20 of the seat 1000. The seat basin 101 is connected to the bottom panel 102 and can move relative to each other. The base connecting rod assembly is provided between the seat basin 101 and the bottom panel 102, and the bottom panel 102 and the base connecting rod assembly are rotatably connected. The seat basin 101 is rotatably connected to the base connecting rod assembly. The seat basin 101 is subjected to a downward force to drive the seat basin 101 to move relative to the bottom panel 102. When a user sits on the seat, due to the body's own weight, the seat basin 101 moves downward and forward relative to the bottom panel 102, driving the back panel 20 to move forward.

[0053] Therefore, when the seat basin 101 is subjected to a downward force, it moves forward, ensuring that the back panel 20 reaches a comfortable position for the user, realizing adaptive support of the back or waist of the user by the backrest or lumbar support, improving the comfort and applicability of the seat 1000, and being able to effectively relieve discomfort or fatigue and meet the personalized needs of different users.

[0054] In some embodiments, the base link assembly includes: a first base link 103, which is connected between the bottom plate 102 and the seat basin 101; and a second base link 104, which is spaced apart from the first base link 103 and connected between the bottom plate 102 and the seat basin 101. As shown in the figure, the first base link 103 and the second base link 104 are arranged in parallel and spaced apart, ensuring a good user experience and safety. The good support and adaptability help reduce back discomfort and other problems that may be caused by long periods of sitting.

[0055] Furthermore, a first base connection hole is formed at one end of the first base connecting rod 103, and a second base connection hole is formed at the seat bowl 101. The first base connecting rod 103 and the seat bowl 101 are rotatably connected by a first base connecting shaft 1001 that passes through the first and second base connection holes. A third base connection hole is formed at the other end of the first base connecting rod 103, and a fourth base connection hole is formed at the bottom plate 102. The first base connecting rod 103 and the bottom plate 102 are rotatably connected by the second base connecting shaft 1002 that passes through the third and fourth base connection holes. It can be understood that the rotatable connection between the first base connecting rod 103 and the seat bowl 101 is achieved by the first base connecting shaft 1001, and the rotatable connection between the first base connecting rod 103 and the bottom plate 102 is achieved by the second base connecting shaft 1002, so that the seat bowl 101 can be adjusted in angle according to the user's actions or external forces, thereby maintaining the consistency of the overall design and the coordination of functions.

[0056] Furthermore, a fifth base connection hole is formed at one end of the second base connecting rod 104, and a sixth base connection hole is formed at the seat bowl 101. The second base connecting rod 104 and the seat bowl 101 are rotatably connected via a third base connection shaft 1003 that passes through the fifth and sixth base connection holes. A seventh base connection hole is formed at the other end of the second base connecting rod 104, and an eighth base connection hole is formed at the bottom plate 102. The second base connecting rod 104 and the bottom plate 102 are rotatably connected via a fourth base connection shaft 1004 that passes through the seventh and eighth base connection holes. It can be understood that the rotatable connection between the second base connecting rod 104 and the seat bowl 101 is achieved via the third base connection shaft 1003, and the rotatable connection between the second base connecting rod 104 and the bottom plate 102 is achieved via the fourth base connection shaft 1004. This enhances the stability and safety of the base connecting rod assembly, reduces imbalance caused by unilateral force, improves load-bearing capacity, and increases the flexibility of the base assembly 100.

[0057] In some embodiments, the base linkage assembly further includes a base connecting rod 105, one end of which is connected to the back panel 20, and the other end of which is connected to the seat basin 101. This further enhances the overall stability and support of the seat 1000, and better coordinates the relative movement between the back panel 20 and the seat basin 101, resulting in high flexibility and good durability.

[0058] In some embodiments, a first base through-hole is formed at one end of the base connecting rod 105, and a back plate 20 shaft hole is formed at the back plate 20. The base connecting rod 105 and the back plate 20 are rotatably connected by a fifth base connecting shaft that penetrates the first base through-hole and the back plate 20 shaft hole. A second base through-hole is formed at the other end of the base connecting rod 105, and the base is formed with a base shaft hole. The base connecting rod 105 and the base are rotatably connected by a sixth base connecting shaft that penetrates the second base through-hole and the base shaft hole. It is understandable that the rotatable connection between the base connecting rod 105 and the back plate 20 is achieved by the fifth base connecting shaft, and the rotatable connection between the base connecting rod 105 and the base is achieved by the sixth base connecting shaft. This can adapt to the user's back or waist movement, support a variety of sitting postures and dynamic adjustments, and has good stability and durability.

[0059] Optionally, in order to further improve the user experience, a damping device or a spring is added to the connection to facilitate control of the rotation speed and smoothness.

[0060] In other embodiments, the base shaft hole and the second base connecting hole are the same, thereby reducing the number of parts, lowering production costs, and facilitating assembly and maintenance.

[0061] In some embodiments, the base assembly 100 further includes a reset member disposed on the bottom plate 102 for resetting the seat basin 101. This not only improves the convenience of the chair but also ensures that the user can quickly achieve a comfortable sitting position in different usage scenarios, thereby maintaining optimal body posture and comfort.

[0062] Optionally, the reset element has the following reset modes:

[0063] Spring-loaded return: Through the built-in spring mechanism, when the user releases the locking mechanism, the spring will automatically pull the lumbar support body back to the preset position;

[0064] Pneumatic rod reset: Through the compression and extension of the pneumatic rod, a smooth reset action is provided. The user only needs to gently push or pull the lumbar support, and the pneumatic rod will assist it to return to the preset position;

[0065] Electric reset: Driven by an electric motor, the user can start the reset function through the control panel or remote control to achieve a fully automated reset process.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore should not be understood as a limitation to the present invention.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0068] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0070] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A backrest assembly, characterized in that: Installed on the seat, including: Backrest assembly; a lumbar support assembly connected to the backrest assembly and located below the backrest assembly; 18. The foldable seat frame of claim 17, wherein the adjusting member is configured to be rotatable with respect to the backrest assembly and the backboard, and the adjusting member is configured to be rotatable with respect to the backrest assembly and the backboard.

2. The backrest assembly according to claim 1, characterized in that: A third connecting hole is formed on the adjusting member, and a fourth connecting hole is formed on the backrest assembly. The backrest assembly and the adjusting member are rotatably connected via a second connecting shaft passing through the third connecting hole and the fourth connecting hole. The adjusting member drives the backrest assembly to rotate around the first connecting shaft.

3. The backrest assembly according to claim 2, characterized in that: The backrest assembly includes a backrest body and a fine-tuning member, wherein the fine-tuning member is arranged between the backboard and the backrest body, one end of the fine-tuning member is connected to the backboard, and the other end of the fine-tuning member is connected to the backrest body.

4. The backrest assembly according to claim 3, characterized in that: A mounting platform is formed on the backrest body, a mounting groove is formed on the mounting platform, and the other end of the fine-tuning member is arranged in the mounting groove.

5. The backrest assembly according to any one of claims 1 to 4, characterized in that: Also includes: A locking member is connected to the adjusting member and is used to fix the length of the adjusting member.

6. The backrest assembly according to claim 3 or 4, characterized in that: The adjusting member is a gas rod, and / or the fine-tuning member is a compression spring.

7. The backrest assembly according to any one of claims 1 to 4, characterized in that: The backrest assembly further includes: a backrest frame and a backrest mesh, wherein a slot is formed on the periphery of the backrest frame, the backrest mesh covers the backrest frame, and the backrest mesh is connected to the backrest frame by being clamped in the slot via a clamping strip; The lumbar support assembly includes a lumbar support frame and a lumbar support mesh. A card slot is formed on the periphery of the lumbar support frame. The lumbar support mesh covers the lumbar support frame. The lumbar support mesh is connected to the lumbar support frame by being clamped in the card slot via a card strip.

8. A seat, characterized in that: include: A base assembly, the base assembly comprising: a seat basin and a bottom plate, the seat basin being connected to the bottom plate and being movable relative to the bottom plate; a back plate rotatably connected to the bottom plate, wherein the seat basin moves relative to the bottom plate to drive the back plate to rotate; The backrest assembly according to any one of claims 1 to 7, wherein the backrest assembly is connected to the back plate, and the back plate rotates to drive the backrest assembly to move.

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