Waist support assembly and seat

Abstract

The utility model discloses a waist support assembly and a seat. The waist support assembly comprises a waist support body and a waist support body, the two ends of the first waist support connecting rod are rotationally connected with the waist support body and a bottom plate of the seat respectively; the two ends of the second waist support connecting rod are rotatably connected with the waist support body and a back plate of the seat respectively. According to the waist support assembly, support is continuously provided for the waist through the connecting rod mechanism, personalized support experience is provided for a user, the user can keep a good sitting posture no matter in a working state or a resting state, the problems of muscle tension and fatigue caused by long-time sitting are solved, and the stability and durability of the waist support assembly are guaranteed.

Description

Technical Field

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

[0002] Relevant technologies point out that existing seat structures often adopt a fixed support design and lack adaptive support for various parts of the user's body, which may lead to discomfort or fatigue after long-term use. It cannot be adjusted according to the user's body shape and posture, limiting the comfort and applicability of the seat. Or, it requires self-adjustment and cannot meet the personalized needs of different users for lumbar support position and strength. 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 lumbar support assembly that can continuously provide support for the waist.

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

[0005] According to the first aspect of the present invention, the lumbar support assembly is provided on a seat, and the lumbar support assembly includes: a lumbar support body; a first lumbar support connecting rod, the two ends of which are rotatably connected to the lumbar support body and the bottom plate of the seat respectively; and a second lumbar support connecting rod, the two ends of which are rotatably connected to the lumbar support body and the back plate of the seat respectively.

[0006] According to the lumbar support assembly of the present invention, continuous support is provided for the waist through a connecting rod mechanism, providing the user with a personalized support experience. The user can maintain a good sitting posture whether at work or at rest, which helps to reduce muscle tension and fatigue caused by sitting for a long time, and ensures the stability and durability of the lumbar support assembly.

[0007] In some embodiments, the lumbar support body is formed with a lumbar support pivot portion, and one end of the first lumbar support link and one end of the second lumbar support link are both connected to the lumbar support pivot portion.

[0008] In some embodiments, a first lumbar support connecting hole is formed at the other end of the first lumbar support link, and a first bottom plate connecting hole is formed on the bottom plate of the seat. The first lumbar support link and the bottom plate are rotatably connected by a connecting shaft that passes through the first lumbar support connecting hole and the first bottom plate connecting hole.

[0009] In some embodiments, a second lumbar support connecting hole is formed at the other end of the second lumbar support link, and a lower backboard connecting hole is formed on the backboard of the seat. The second lumbar support link and the backboard are rotatably connected by a lumbar-back connecting shaft that passes through the second lumbar support connecting hole and the lower backboard connecting hole.

[0010] In some embodiments, the bottom plate is formed with a first bottom plate pivot portion, and the first bottom plate pivot portion and the first bottom plate connecting hole are spaced apart in a front-to-rear direction.

[0011] In some embodiments, the lumbar support assembly further includes: a third lumbar support link, one end of the third lumbar support link is rotatably connected to the second lumbar support link, and the other end of the third lumbar support link is rotatably connected to the bottom of the seat basin of the seat.

[0012] In some embodiments, a third lumbar support connecting hole is formed at the front end of the third lumbar support link, and a seat basin connecting hole is formed on the seat basin. The third lumbar support link and the seat basin are rotatably connected by a rotating shaft passing through the third lumbar support connecting hole and the seat basin connecting hole.

[0013] In some embodiments, the lumbar support assembly further includes: a lumbar support adjusting member, which is connected to the lumbar support assembly and is used to adjust the position of the lumbar support body.

[0014] In some embodiments, the lumbar support body 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 through a card strip.

[0015] The seat according to the second aspect of the present invention includes the lumbar support assembly according to the first aspect of the present invention.

[0016] The seat according to the present invention is provided with the lumbar support assembly of the first aspect mentioned above, and is adapted to the needs of different users from the perspective of ergonomic principles. Moreover, the seat can be adjusted to provide optimal support during use, thereby achieving adaptive support for the user's waist, improving the comfort and applicability of the seat, effectively alleviating discomfort or fatigue, and 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] 100. Seat; 101. Chair legs; 102. Base assembly; 1021. Seat basin; 1022. Bottom plate; 1023. First base connecting rod; 1024. Second base connecting rod; 103. Back plate; 1031. Head-back connecting shaft; 104. Lumbar support assembly; 1041. Lumbar support body; 1042. First lumbar support connecting rod; 1043. Second lumbar support connecting rod; 1044. Lumbar-back connecting shaft; 1045. Third lumbar support connecting rod; 105. Backrest assembly; 10 51. Backrest body; 1052. First backrest link; 1053. Second backrest link; 1054. Backrest connecting shaft; 1055. Backrest link connecting shaft; 1056. Bottom back connecting shaft; 106. Headrest assembly; 1061. Headrest body; 1062. First headrest link; 1063. Headrest connecting shaft; 1064. Connecting shaft; 1065. Second headrest link; 1066. Third headrest link; 1067. Headrest rotating shaft; 107. Rotating shaft. DETAILED DESCRIPTION

[0022] 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.

[0023] Reference below Figure 1 and Figure 2 The waist support assembly 104 according to the first embodiment of the present invention is described.

[0024] like Figure 1 and Figure 2 As shown, the lumbar support assembly 104 according to the first embodiment of the present invention includes: a lumbar support body 1041 , a first lumbar support connecting rod 1042 and a second lumbar support connecting rod 1043 .

[0025] Specifically, the lumbar support assembly 104 is provided on the seat 100. The two ends of the first lumbar support link 1042 are rotatably connected to the lumbar support body 1041 and the bottom plate 1022 of the seat 100, respectively. The two ends of the second lumbar support link 1043 are rotatably connected to the lumbar support body 1041 and the back plate 103 of the seat 100, respectively. As a result, the lumbar support body 1041 can be rotated and adjusted relative to the bottom plate 1022 to adapt to the movement of the seat basin 1021 and changes in the user's sitting posture, maintaining good lumbar support at all times and reducing discomfort caused by sitting for long periods of time.

[0026] According to the lumbar support assembly 104 of the embodiment of the present invention, continuous support is provided for the waist through a connecting rod mechanism, providing the user with a personalized support experience. The user can maintain a good sitting posture whether at work or at rest, which helps to reduce muscle tension and fatigue caused by sitting for a long time, and ensures the stability and durability of the lumbar support assembly 104.

[0027] In some embodiments of the present invention, the lumbar support body 1041 is formed with a lumbar support pivot portion, and one end of the first lumbar support link 1042 and one end of the second lumbar support link 1043 are both connected to the lumbar support pivot portion, thereby reducing the number of required connecting parts, making the entire lumbar support assembly 104 more simple and compact, while reducing manufacturing costs, enhancing the functionality of the lumbar support assembly 104, and improving the user's overall comfort and support effect.

[0028] Furthermore, a first lumbar support connecting hole is formed at the other end of the first lumbar support link 1042, and a first base plate connecting hole is formed on the base plate 1022. The first lumbar support link 1042 and the base plate 1022 are rotatably connected by passing through the first lumbar support connecting hole and the first base plate connecting hole via a connecting shaft 1064. In this way, through the lumbar support pivot portion and the connecting shaft 1064 between the first lumbar support link 1042 and the base plate 1022, the lumbar support assembly 104 can be adjusted in multiple directions to adapt to different sitting postures and user needs, thereby reducing lumbar discomfort that may be caused by sitting for a long time, and has good structural stability and a long service life.

[0029] Furthermore, a second lumbar support connection hole is formed at the other end of the second lumbar support link 1043, and a lower backboard connection hole is formed on the back panel 103. The lower backboard connection hole is located above the lower backboard connection hole. The second lumbar support link 1043 and the back panel 103 are rotatably connected by a waist-back connection shaft 1044 that passes through the second lumbar support connection hole and the lower backboard connection hole. As a result, when the back panel 103 tilts or moves, the second lumbar support link 1043 can rotate accordingly, allowing the lumbar support body 1041 to maintain the correct support position, providing continuous lumbar support for the user and helping to reduce the pressure on the waist caused by sitting for long periods of time. Furthermore, the structure is simple and easy to assemble.

[0030] For example Figure 1 and Figure 2 As shown, the base plate 1022 is formed with a first base plate 1022 pivot portion, which is spaced apart from the first base plate connection hole in the front-to-back direction. This allows the tilt of the back plate 103 and the movement of the lumbar support assembly 104 to be adjusted relatively independently. By distributing different connection points at different locations on the base plate 1022, the applied forces can be better dispersed, reducing the pressure on a single connection point and improving the stability and durability of the entire seat.

[0031] In some embodiments of the present invention, the lumbar support assembly 104 further includes a third lumbar support link 1045, one end of which is rotatably connected to the second lumbar support link 1043, and the other end of which is rotatably connected to the bottom of the seat basin 1021. This makes the entire lumbar support assembly 104 more complex and flexible, providing a wider range of adjustment and support by adding more connection points, ensuring optimal lumbar support for the user in various sitting positions. The lumbar support assembly 104 not only becomes more flexible and functional, but also improves user comfort and support.

[0032] In some embodiments of the present invention, a third lumbar support connecting hole is formed at the front end of the third lumbar support connecting rod 1045, and a seat basin connecting hole is formed in the seat basin 1021. The third lumbar support connecting rod 1045 and the seat basin 1021 are rotatably connected by a rotating shaft 107 that passes through the third lumbar support connecting hole and the seat basin connecting hole. This ensures that the lumbar support assembly 104 can be flexibly adjusted as the seat basin 1021 moves, thereby providing better lumbar support.

[0033] In some embodiments of the present invention, the lumbar support assembly 104 further includes a lumbar support adjustment member connected to the lumbar support assembly 104 for adjusting the position of the lumbar support body 1041. This allows the user to fine-tune the position of the lumbar support body 1041 based on their body shape and comfort requirements to achieve optimal lumbar support. Whether the user is working, reading, or relaxing, they can adjust the lumbar support body 1041 to find the most comfortable posture and reduce discomfort caused by sitting for long periods of time.

[0034] Optionally, the lumbar support adjustment member has the following adjustment methods:

[0035] Knob-type adjustment: The position of the lumbar support body 1041 is adjusted by rotating the knob, which is commonly used for height and depth adjustment;

[0036] Slider type adjustment: the position of the lumbar support body 1041 can be changed by pushing the slider, which is suitable for height and depth adjustment;

[0037] Lever adjustment: The angle of the lumbar support body 1041 is adjusted by pulling or pushing a lever, which is common in angle adjustment.

[0038] Furthermore, the lumbar support assembly 104 also includes a lumbar support lock, which is connected to the lumbar support assembly 104 and is used to lock the lumbar support body 1041 in the appropriate position. This ensures that the lumbar support body 1041 will not move accidentally during use, providing more stable support. The user can lock the lumbar support in the most comfortable position, ensuring the same comfort every time, and improving the quality of work or rest.

[0039] Optionally, the lumbar support lock has the following locking methods:

[0040] Buckle lock: With the built-in buckle mechanism, users can easily lock or unlock the lumbar support. The buckle is usually designed to pop out automatically or be manually pressed;

[0041] Knob lock: Adjust and lock the lumbar support angle by rotating the knob. The knob has clear scales or markings to facilitate precise adjustment.

[0042] Lever lock: Pull or push the lever to lock or unlock the lumbar support. The lever is usually designed in the form of a handle for easy operation.

[0043] Ratchet Lock: The ratchet mechanism gradually adjusts and locks the lumbar support angle. Users can fine-tune the angle through continuous operation until they reach a satisfactory position.

[0044] Furthermore, the lumbar support assembly 104 also includes a lumbar support reset member connected to the lumbar support assembly 104 for restoring the lumbar support body 1041 to its proper position. This not only improves the chair's usability but also ensures that users can quickly achieve a comfortable sitting position in various usage scenarios, thereby maintaining optimal posture and comfort.

[0045] Optionally, the lumbar support reset member has the following reset methods:

[0046] Spring-loaded return: Through a built-in spring mechanism, when the user releases the locking mechanism, the spring automatically pulls the lumbar support body 1041 back to the preset position;

[0047] 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;

[0048] 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.

[0049] In some embodiments of the present invention, the lumbar support body 1041 includes a lumbar support frame and a lumbar support mesh. The lumbar support frame is formed with a slot around its perimeter, and the lumbar support mesh wraps around the lumbar support frame. The lumbar support mesh is connected to the lumbar support frame via a clip that is secured within the slot. This provides a simple connection, good ventilation, high comfort, long service life, and ease of cleaning and maintenance.

[0050] The seat 100 according to the second embodiment of the present invention includes the lumbar support assembly 104 according to the first embodiment of the present invention.

[0051] According to the seat 100 of the embodiment of the present invention, by providing the lumbar support assembly 104 of the above-mentioned first embodiment, it is adapted to the needs of different users based on ergonomic principles, and can be adjusted to provide optimal support during use, thereby achieving adaptive support for the user's waist by the seat 100, improving the comfort and applicability of the seat 100, effectively alleviating discomfort or fatigue, and meeting the personalized needs of different users.

[0052] In some embodiments of the present invention, the seat 100 includes: a chair leg 101, a base assembly 102, a backboard 103, a lumbar support assembly 104, a backrest assembly 105 and a head support assembly 106.

[0053] Specifically, the base assembly 102 is arranged on the upper part of the chair leg 101 and is connected to the chair leg 101. The base assembly 102 includes: a seat basin 1021 and a bottom plate 1022. The seat basin 1021 is connected to the bottom plate 1022 and can move relatively. The bottom plate 1022 is formed with a first bottom plate 1022 pivot portion. One end of the back plate 103 is connected to the first bottom plate 1022 pivot portion. The lumbar support assembly 104 is connected to the back plate 103 and the seat basin 1021. The seat basin 1021 rotates relative to the bottom plate 1022 to drive the lumbar support assembly 104 to move. The backrest assembly 105 is connected to the back plate 103 and the seat basin 1021. The seat basin 1021 rotates relative to the bottom plate 1022 to drive the backrest assembly 105 to move. The head support assembly 106 is connected to the base assembly 102. The seat basin 1021 moves relative to the bottom plate 1022 to drive the head support assembly 106 to move.

[0054] It can be understood that when the seat basin 1021 rotates relative to the base plate 1022, the lumbar support assembly 104 moves with the movement, thereby providing support for the user's waist; the backrest assembly 105 is connected to the back plate 103 and the seat basin 1021. When the seat basin 1021 moves, the backrest assembly 105 also adjusts its position accordingly, ensuring that the user can get good back support even if the user changes his sitting posture; the head support assembly 106 is fixed to the base assembly 102. As the movement of the seat basin 1021 changes, the position of the head support will also be adjusted to provide head support for the user, especially when in a relaxed state.

[0055] In some embodiments of the present invention, the headrest assembly 106 includes a headrest body 1061 and a first headrest link 1062. The first headrest link 1062 is rotatably connected to the headrest body 1061 and the base 1022 at its ends, respectively. Specifically, one end of the first headrest link 1062 is connected to the headrest body 1061, while the other end is rotatably connected to the base 1022. This allows the headrest to not only move up and down with the movement of the seat 1021 relative to the base 1022 (for example, when the user leans back), but also rotate within a certain range independently of other components. This flexibility is particularly useful for those who prefer to change their posture while working or resting. Even if other components of the chair shift, such as when the seat 1021 rotates relative to the base 1022, causing changes in lumbar and back support, the headrest remains in place, providing the user with consistent and stable head support, reducing neck strain, and improving overall sitting comfort.

[0056] In some embodiments of the present invention, a first head support connection hole is formed on the head support body 1061, and a second head support connection hole is formed on the upper end of the first head support connecting rod 1062. The head support body 1061 and the first head support connecting rod 1062 are rotatably connected by the head support connecting shaft 1063. The head support body 1061 and the first head support connecting rod 1062 are inserted into the first head support connection hole and the second head support connection hole. As a result, the user can adjust the angle of the head support according to their needs, which improves the flexibility of the head support assembly 106 and enables the head support assembly 106 to better meet the user's personal needs. By adjusting to the most comfortable position, the pressure on the neck can be effectively reduced, thereby improving the comfort of the seat 100.

[0057] Furthermore, a third head support connection hole is formed at the lower end of the first head support link 1062, and a first bottom plate connection hole is formed on the bottom plate 1022. The third head support connection hole and the first bottom plate connection hole are coaxially arranged. The first head support link 1062 and the bottom plate 1022 are rotatably connected by a connecting shaft 1064 that penetrates the third head support connection hole and the first bottom plate connection hole. Thus, the rotatable connection mechanism achieved by multiple connection holes and connecting shaft 1064 enhances the functionality and adaptability of the chair and improves the user experience.

[0058] In some embodiments of the present invention, the head support assembly 106 further includes: a second head support link 1065 and a third head support link 1066, wherein a fourth head support connection hole is formed at the front end of the second head support link 1065, and a fifth head support connection hole is formed at the front end of the third head support link 1066, and the second head support link 1065 and the seat basin 1021 are rotatably connected by passing through the fourth head support connection hole and the seat basin connection hole via the rotating shaft 107, and the third head support link 1066 and the seat basin 1021 are rotatably connected by passing through the fifth head support connection hole and the seat basin connection hole via the rotating shaft 107. Thus, the stability of the head support assembly 106 during the adjustment process is enhanced, and the adjustable range of the head support assembly 106 is expanded. When the user changes posture or other parts of the chair (such as the backboard 103, lumbar support, etc.) move, it can continuously provide good dynamic head support, better disperse pressure, and allow the user to find the head support position that best suits them, thereby improving overall comfort.

[0059] Furthermore, a sixth head support connection hole is formed on the first head support link 1062, and a seventh head support connection hole is formed on the rear end of the second head support link 1065. The first head support link 1062 and the second head support link 1065 are rotatably connected by passing through the sixth head support connection hole and the seventh head support connection hole via the head support rotating shaft 1071067. It can be understood that when the user changes the sitting posture or other parts of the chair (such as the back panel 103, the lumbar support, etc.) move, these additional connection points allow the head support assembly 106 to respond more flexibly, always maintain the optimal support position for the head, and be able to withstand various stresses in daily use, thereby ensuring reliability in long-term use and enhancing adaptability and comfort.

[0060] Furthermore, a back panel bottom connection hole is formed on the back panel 103, and an eighth head support connection hole is formed at the rear end of the third head support connecting rod 1066. The third head support connecting rod 1066 and the back panel 103 are rotatably connected by passing through the back panel bottom connection hole and the eighth head support connection hole via the head-back connecting shaft 1031. Thus, by directly connecting the third head support connecting rod 1066 to the back panel 103, the entire head support system is more tightly integrated into the chair back structure, enhancing the overall stability and consistency. Based on ergonomic principles, it can better adapt to the individual differences and preferences of users, thereby improving comfort for long-term use. In addition, by rationally distributing the various connection points, it can disperse the force, reduce the pressure on a single component, extend the service life, and ensure the overall stability of the structure.

[0061] In some embodiments of the present invention, the headrest assembly 106 further includes a headrest adjustment member connected to the headrest assembly 106 for adjusting the headrest body 1061 to a desired position. This allows the user to fine-tune the position of the headrest body 1061 based on their body shape and comfort requirements, achieving optimal back support. Whether the user is working, reading, or relaxing, they can adjust the headrest body 1061 to find the most comfortable position, reducing discomfort from prolonged sitting.

[0062] Optionally, the head support adjustment member has the following adjustment methods:

[0063] Knob-type adjustment: The position of the head support body 1061 is adjusted by rotating the knob, which is commonly used for height and depth adjustment;

[0064] Slider type adjustment: the position of the head support body 1061 is changed by pushing the slider, suitable for height and depth adjustment;

[0065] Lever adjustment: The angle of the headrest body 1061 is adjusted by pulling or pushing a lever, which is common in angle adjustment.

[0066] Furthermore, the headrest assembly 106 also includes a headrest locking member connected to the headrest assembly 106 for locking the headrest body 1061 in the adapted position. This ensures that the headrest body 1061 does not accidentally move during use, providing more stable support. The user can lock the headrest in the most comfortable position, ensuring the same comfort every time, and improving the quality of work or rest.

[0067] Optionally, the headrest lock has the following locking methods:

[0068] Snap-on lock: The built-in snap-on mechanism allows users to easily lock or unlock the headrest. The snap-on mechanism is usually designed to pop out automatically or be manually pressed.

[0069] Knob lock: Adjust and lock the headrest angle by rotating the knob. The knob has clear scales or markings to facilitate precise adjustment.

[0070] Lever lock: The headrest is locked or unlocked by pulling or pushing a lever. The lever is usually designed in the form of a handle for easy operation.

[0071] Ratchet Lock: The ratchet mechanism gradually adjusts and locks the headrest angle. Users can fine-tune the angle through continuous operation until they reach a satisfactory position.

[0072] In some embodiments of the present invention, the headrest assembly 106 further includes a headrest reset member connected to the headrest assembly 106 for restoring the headrest body 1061 to an adapted position. This not only improves the chair's usability but also ensures that the user can quickly achieve a comfortable sitting position in various usage scenarios, thereby maintaining optimal posture and comfort.

[0073] Optionally, the head support reset member has the following reset methods:

[0074] Spring-loaded return: Through a built-in spring mechanism, when the user releases the locking mechanism, the spring automatically pulls the headrest body 1061 back to the preset position;

[0075] Pneumatic rod reset: Through the compression and extension of the pneumatic rod, it provides a smooth reset action. The user only needs to gently push or pull the headrest, and the pneumatic rod will assist it to return to the preset position;

[0076] 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.

[0077] In some embodiments of the present invention, the headrest body 1061 includes a headrest frame and a headrest mesh. A slot is formed around the periphery of the headrest frame, and the headrest mesh wraps around the headrest frame. The headrest mesh is secured to the headrest frame via a clip that is secured within the slot. This allows for a simple connection, good ventilation, high comfort, a long service life, and ease of cleaning and maintenance.

[0078] In some embodiments of the present invention, the base assembly 102 further includes a first base connecting rod 1023 and a second base connecting rod 1024. The first base connecting rod 1023 has two ends rotatably connected to the seat basin 1021 and the bottom plate 1022, respectively. The second base connecting rod 1024 has two ends rotatably connected to the seat basin 1021 and the base, respectively. It will be appreciated that when a downward force is applied to the seat basin 1021, the seat basin 1021 moves forward relative to the bottom plate 1022, and the lumbar support assembly 104, backrest assembly 105, and head support assembly 106 are all adjusted to a comfortable position for the user, thereby improving the comfort of the seat 100.

[0079] In some embodiments of the present invention, the backrest assembly 105 includes a backrest body 1051, a first backrest link 1052, and a second backrest link 1053. One end of the first backrest link 1052 is connected to the backrest body 1051 and the other end is rotatably connected to the back plate 103. One end of the second backrest link 1053 is connected to the first backrest link 1052, and the other end of the second backrest link 1053 is rotatably connected to the bottom plate 1022. As a result, the backrest body 1051 can be rotated and adjusted relative to the bottom plate 1022 to adapt to the movement of the seat pan 1021 and changes in the user's sitting posture, thereby maintaining good lumbar support and reducing discomfort caused by long-term sitting.

[0080] In some embodiments of the present invention, the first backrest connecting rod 1052 includes a first backrest connecting rod portion and a second backrest connecting rod portion. The first backrest connecting rod portion extends in the vertical direction, and the second backrest connecting rod portion extends in the front-to-back direction. The upper end of the first backrest connecting rod portion is connected to the front end of the second backrest connecting rod portion. The first backrest connecting rod portion is connected to the backrest body 1051. The second backrest connecting rod portion is formed with first and second backrest connecting holes arranged at intervals. As a result, the backrest body 1051 can move in the vertical direction relative to the first backrest connecting rod, thereby accommodating users of different heights. In this way, the backrest assembly 105 not only becomes more flexible and functional, but also improves user comfort and support.

[0081] In some embodiments of the present invention, a back plate connection hole is formed on the back plate 103, and the first backrest connecting rod 1052 is rotatably connected to the back plate 103 by passing through the first backrest connection hole and the back plate connection hole via a backrest connection shaft 1054. It can be understood that by introducing the first backrest connection rod portion and the second backrest connection rod portion, and achieving a rotatable connection with the back plate 103 via the backrest connection shaft 1054, the backrest assembly 105 not only becomes more flexible and functional, but also improves the user's comfort and support effect, fully considering ergonomic principles, and providing the user with a comfortable and supportive sitting environment, which is particularly suitable for users who need to sit for long periods of time to work.

[0082] In some embodiments of the present invention, a third backrest connection hole is formed at one end of the second backrest link 1053. The second backrest link 1053 and the first backrest link 1052 are rotatably connected by a backrest link connecting shaft 1055 that passes through the second backrest connection hole and the third backrest connection hole. It can be understood that the rotatable connection with the second backrest link 1053 via the backrest link connecting shaft 1055 ensures that no matter how the user changes their sitting posture, the backrest can quickly respond and adjust its position, providing the user with continuous and comfortable back support.

[0083] Furthermore, the base plate 1022 is formed with a second base plate connection hole, which is formed on the pivot portion of the first base plate 1022. The other end of the second backrest link 1053 is formed with a fourth backrest connection hole. The second backrest link 1053 is rotatably connected to the base plate 1022 via a base-back connection shaft 1056 that passes through the second base plate connection hole and the fourth backrest connection hole. As a result, when the back plate 103 tilts or moves, the first backrest link 1052 and the second backrest link 1053 can rotate accordingly, allowing the backrest body 1051 to maintain the correct support position, providing continuous back support for the user and helping to reduce back pressure caused by sitting for long periods of time. The structure is simple and easy to assemble.

[0084] Preferably, the bottom plates 1022 include two spaced apart in the left-right direction, and the second backrest connecting rods 1053 include two, each of which is connected to one bottom plate 1022. Thus, the structure of the backrest assembly 105 is more stable, the support is more uniform, and continuous and comfortable back support is provided to the user.

[0085] In some embodiments of the present invention, both ends of the second backrest link 1053 are formed with a forward-extending bend, the third backrest connection hole is formed in the upper bend, and the fourth backrest connection hole is formed in the lower bend. Thus, by forming forward-extending bends at both ends of the second backrest link 1053 and providing connection holes in the bends, the backrest assembly 105 not only becomes more flexible and functional, but also improves user comfort and support.

[0086] In some embodiments of the present invention, the backrest assembly 105 further includes a backrest adjustment member connected to the backrest assembly 105 for adjusting the backrest body 1051 to a desired position. This allows the user to fine-tune the position of the backrest body 1051 based on their body shape and comfort requirements, achieving optimal back support. Whether the user is working, reading, or relaxing, adjusting the backrest body 1051 allows the user to find the most comfortable posture, reducing discomfort from prolonged sitting.

[0087] Optionally, the backrest adjustment member has the following adjustment methods:

[0088] Knob-type adjustment: The position of the backrest body 1051 is adjusted by rotating the knob, which is commonly used for height and depth adjustment;

[0089] Slider type adjustment: by pushing the slider to change the position of the backrest body 1051, suitable for height and depth adjustment;

[0090] Lever adjustment: The angle of the backrest body 1051 is adjusted by pulling or pushing a lever, which is common in angle adjustment.

[0091] In some embodiments of the present invention, the backrest assembly 105 further includes a backrest restoring member connected to the backrest assembly 105 for restoring the backrest body 1051 to an adapted position. This not only improves the chair's usability but also ensures that the user can quickly achieve a comfortable sitting position in various usage scenarios, thereby maintaining optimal posture and comfort.

[0092] Optionally, the backrest reset member has the following reset modes:

[0093] Spring-type return: Through the built-in spring mechanism, when the user releases the locking mechanism, the spring will automatically pull the backrest body 1051 back to the preset position;

[0094] Gas rod reset: Through the compression and extension of the gas rod, it provides a smooth reset action. The user only needs to gently push or pull the backrest, and the gas rod will assist it to return to the preset position;

[0095] 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.

[0096] In some embodiments of the present invention, the backrest body 1051 includes a backrest frame and a backrest mesh. A slot is formed around the periphery of the backrest frame, and the backrest mesh wraps around the backrest frame. The backrest mesh is secured to the backrest frame via a clip that is positioned within the slot. This provides a simple connection, good ventilation, high comfort, long service life, and ease of cleaning and maintenance.

[0097] Furthermore, the backrest assembly 105 further includes a backrest locking member connected to the backrest assembly 105 for locking the backrest body 1051 in an adapted position. This prevents the backrest body 1051 from accidentally moving during use, providing more stable support. The user can lock the backrest in the most comfortable position, ensuring the same comfort every time, thereby improving the quality of work or rest.

[0098] Optionally, the backrest can be locked in the following ways:

[0099] Snap-on lock: The built-in snap-on mechanism allows users to easily lock or unlock the backrest. The snap-on mechanism is usually designed to pop out automatically or be manually pressed.

[0100] Knob lock: adjust and lock the backrest angle by rotating the knob. The knob has clear scales or markings to facilitate precise adjustment.

[0101] Lever lock: The backrest is locked or unlocked by pulling or pushing a lever. The lever is usually designed in the form of a handle for easy operation.

[0102] Ratchet lock: The ratchet mechanism gradually adjusts and locks the backrest angle. Users can fine-tune the angle through continuous operation until they reach a satisfactory position.

[0103] To sum up, the head support assembly 106 is formed as a four-bar linkage, the backrest assembly 105 is formed as a four-bar linkage, and the lumbar support assembly 104 is formed as a four-bar linkage. The head support assembly 106, the backrest assembly 105 and the lumbar support assembly 104 are all respectively linked with the seat basin 1021, realizing relatively independent functions and improving the comfort of the seat.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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 lumbar support assembly, characterized in that: The lumbar support assembly is provided on the seat and includes: lumbar support body; a first lumbar support connecting rod, wherein both ends of the first lumbar support connecting rod are rotatably connected to the lumbar support body and the bottom plate of the seat respectively; The second lumbar support connecting rod has two ends rotatably connected to the lumbar support body and the back plate of the seat respectively.

2. The lumbar support assembly according to claim 1, wherein: The lumbar support body is formed with a lumbar support pivot portion, and one end of the first lumbar support connecting rod and one end of the second lumbar support connecting rod are both connected to the lumbar support pivot portion.

3. The lumbar support assembly according to claim 2, wherein: A first lumbar support connecting hole is formed at the other end of the first lumbar support connecting rod, and a first base plate connecting hole is formed on the base plate of the seat. The first lumbar support connecting rod and the base plate are rotatably connected by a connecting shaft that penetrates the first lumbar support connecting hole and the first base plate connecting hole.

4. The lumbar support assembly according to claim 3, wherein: A second lumbar support connecting hole is formed at the other end of the second lumbar support connecting rod, and a backboard lower connecting hole is formed on the backboard of the seat. The second lumbar support connecting rod and the backboard are rotatably connected by a lumbar-back connecting shaft that penetrates the second lumbar support connecting hole and the backboard lower connecting hole.

5. The lumbar support assembly according to claim 4, characterized in that: The bottom plate is formed with a first bottom plate pivot portion, and the first bottom plate pivot portion is spaced apart from the first bottom plate connecting hole in a front-to-rear direction.

6. The lumbar support assembly according to claim 5, characterized in that: Also includes: A third lumbar support link, one end of which is rotatably connected to the second lumbar support link, and the other end of which is rotatably connected to the bottom of the seat basin of the seat.

7. The lumbar support assembly according to claim 6, wherein: A third lumbar support connecting hole is formed at the front end of the third lumbar support connecting rod, and a seat basin connecting hole is formed on the seat basin. The third lumbar support connecting rod and the seat basin are rotatably connected by a rotating shaft passing through the third lumbar support connecting hole and the seat basin connecting hole.

8. The lumbar support assembly according to any one of claims 1 to 7, characterized in that: Also includes: A lumbar support adjusting member is connected to the lumbar support assembly and is used to adjust the position of the lumbar support body.

9. The lumbar support assembly according to any one of claims 1 to 7, characterized in that: The lumbar support body 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.

10. A seat, characterized in that: The utility model comprises the lumbar support assembly according to any one of claims 1 to 9.

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