seat

Abstract

This utility model provides a seat, comprising: a backrest; and a lumbar support, the lumbar support comprising: a rotating member rotatably mounted on the backrest about an axis extending in a first direction, and rotatable between a first initial position and a first adaptive position, the first direction being the width direction of the backrest; a first elastic member disposed between the rotating member and the backrest, and always pushing the rotating member to rotate toward the first initial position; a movable member movably mounted on the rotating member along a second direction, the second direction being the height direction of the backrest; and a lumbar support body fixedly connected to the movable member, adapted to support the waist of a human body. According to this utility model, the seat, with its rotating member, first elastic member, and movable member, allows for adjustment of the lumbar support body's position according to actual usage needs, thereby satisfying multi-angle and multi-position adjustments of the lumbar support body, effectively improving the seat's self-adaptability and comfort.

Description

Technical Field

[0001] This utility model relates to the field of seat manufacturing technology, and in particular to a seat. Background Technology

[0002] The existing seat design requires adjusting the position of the lumbar support body according to the position of the lower back to ensure good support. However, this method is cumbersome, and the lumbar support body cannot automatically adjust to the appropriate position, thus failing to improve user comfort. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the present invention provides a seat that improves the comfort of the seat.

[0004] A chair according to an embodiment of the present invention includes: a chair back; a lumbar support, the lumbar support including: a rotating member rotatably disposed on the chair back about an axis extending along a first direction, and rotatable between a first initial position and a first adaptive position, the first direction being the width direction of the chair back; a first elastic member disposed between the rotating member and the chair back, and always pushing the rotating member to rotate toward the first initial position; a movable member movably disposed on the rotating member along a second direction, the second direction being the height direction of the chair back; and a lumbar support body fixedly connected to the movable member and adapted to support the waist of a human body.

[0005] The seat according to this utility model is provided with a rotating component, a first elastic component, and a moving component. The position of the lumbar support body can be adjusted according to actual usage needs, ensuring that the lumbar support body can provide good support for the waist. At the same time, the rotating component and the moving component work together to adapt to various sitting postures, thereby satisfying the adjustment of the lumbar support body at multiple angles and positions, and thus effectively improving the seat's self-adaptability and comfort.

[0006] According to some embodiments of the present invention, the seat includes: a first plate, the first plate being fixedly connected to the backrest, the first plate and the rotating member being arranged along the first direction, and the rotating member being rotatably disposed on the first plate.

[0007] According to some optional embodiments of the present invention, the first plate is provided with a first lug, the rotating member is provided with a second lug, the first lug and the second lug are arranged at intervals in a third direction, the third direction being the thickness direction of the chair back, and the two ends of the first elastic member are respectively connected to the first lug and the second lug.

[0008] According to some embodiments of the present invention, the seat includes: a first bracket, wherein the first plate is fixedly connected to the backrest via the first bracket.

[0009] According to some embodiments of the present invention, the seat includes: a second bracket, one end of the second bracket being connected to the backrest, and the other end of the second bracket and one of the rotating members having a rotating shaft and the other having a shaft hole, the rotating shaft extending along the first direction and rotatably fitting into the shaft hole.

[0010] According to some embodiments of the present invention, the movable member is movable relative to the rotating member along the second direction between a second initial position and a second adaptive position, and the lumbar support further includes a second elastic member connected between the rotating member and the movable member, and the second elastic member always pushes the movable member toward the second initial position.

[0011] According to some optional embodiments of the present invention, the rotating member is provided with a first protrusion, the moving member is provided with a second protrusion, the first protrusion and the second protrusion are arranged at intervals along the second direction, and the two ends of the second elastic member are respectively connected to the first protrusion and the second protrusion.

[0012] According to some embodiments of the present invention, the moving member is provided with a sliding groove, and the sliding groove extends along the second direction. The rotating member is provided with a boss on one side surface facing the moving member, and the boss is slidably disposed in the sliding groove.

[0013] According to some optional embodiments of the present invention, the seat further includes: a mounting plate, the mounting plate being fixedly connected to the boss, the moving member having a guide groove extending along the first direction, the guide groove being disposed on the two side walls of the sliding groove in the third direction, and the mounting plate being slidably fitted into the guide groove on both sides of the third direction.

[0014] According to some embodiments of the present invention, the lumbar support body includes an annular frame, the movable member is disposed on the inner surface of the lumbar support body, and the rotating member is disposed on the side of the movable member facing the interior of the lumbar support body.

[0015] According to some optional embodiments of the present invention, the number of rotating parts is two, and the two rotating parts are symmetrically arranged in the frame along the first direction. The number of moving parts is two, and the two moving parts are symmetrically arranged in the frame along the first direction. The moving parts correspond one-to-one with the rotating parts.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a seat according to an embodiment of the present utility model;

[0018] Figure 2 yes Figure 1 The seat shown is an illustration excluding the seat cushion at one angle;

[0019] Figure 3 yes Figure 2 The seat shown is not included in the schematic diagram of another angle of the seat cushion;

[0020] Figure 4 yes Figure 2 A schematic diagram of a portion of the structure of the seat shown;

[0021] Figure 5 yes Figure 4 A schematic diagram of a portion of the structure of the seat shown;

[0022] Figure 6 yes Figure 5 The diagram shows a seat excluding the mounting plate.

[0023] Figure label:

[0024] 100. Seats;

[0025] 10. Chair back;

[0026] 20. Lumbar support; 21. Rotating component; 211. Second lug; 212. Rotating shaft; 213. First protrusion; 214. Boss; 22. First elastic component; 23. Moving component; 231. Second protrusion; 232. Sliding groove; 233. Guide groove; 24. Lumbar support body; 25. Second elastic component;

[0027] 30. First board; 31. First lug;

[0028] 40. First support;

[0029] 50. Second support;

[0030] 60. Mounting plate;

[0031] 70. Seat cushion. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] The following is a reference appendix. Figure 1-6 Describes a seat 100 according to an embodiment of the present utility model.

[0034] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 According to an embodiment of the present utility model, the seat 100 includes: a backrest 10 and a lumbar support 20, wherein the lumbar support 20 is disposed on the backrest 10.

[0035] Specifically, the lumbar support 20 includes: a rotating member 21, a first elastic member 22, a movable member 23, and a lumbar support 20 body. The rotating member 21 rotates along a first direction (e.g., Figure 2 The axis extending in the left-right direction (as shown) is rotatably disposed on the backrest 10 and can rotate between a first initial position and a first adaptive position. The first direction is the width direction of the backrest 10. The first elastic member 22 is disposed between the rotating member 21 and the backrest 10, and always pushes the rotating member 21 to rotate toward the first initial position. The moving member 23 moves along the second direction (as shown in the left-right direction). Figure 2 The upper and lower directions shown are movably mounted on the rotating part 21, and the second direction is the height direction of the chair back 10; the main body of the lumbar support 20 is fixedly connected to the moving part 23 and is suitable for supporting the waist of the human body.

[0036] For example, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the rotating member 21 is rotatably mounted on the chair back 10 about an axis extending in the left-right direction. In the first initial position, the rotating member 21 does not rotate relative to the chair back 10. The rotating member 21 can rotate clockwise about the rotation axis 212 to the first comfortable position, and it can also rotate counterclockwise about the rotation axis 212 to the first comfortable position, so that the lumbar support 20 body rotates relative to the chair back 10. The moving member 23 can move relative to the rotating member 21 in the up-down direction, so that the lumbar support 20 body moves up and down relative to the chair back 10. Preferably, the first elastic member 22 can be an elastic band or a spring, so as to ensure that the first elastic member 22 can return the rotating member 21 to its original position.

[0037] When a user sits on the seat 100 with their back against the backrest 10, if the user applies a force backward to the backrest 10, the user's waist will transmit the force through the lumbar support 20 body to the rotating member 21. The rotating member 21 will rotate relative to the backrest 10, so that the lumbar support 20 body rotates from the first initial position to the first comfortable position. If the user stops applying force to the lumbar support 20 body, the first elastic member 22 will reset the rotating member 21 from the first comfortable position to the first initial position. If different users have different waist heights, when different users apply force to the lumbar support 20 body, under the push of the force, the user's waist will push the lumbar support 20 body to move up or down. The lumbar support 20 body will push the moving member 23 to move up and down relative to the rotating member 21, thereby realizing the adjustment of the lumbar support 20 body in the vertical direction.

[0038] The seat 100 of this utility model is provided with a rotating component 21, a first elastic component 22, and a moving component 23. The first elastic component 22 can reset the rotating component 21 from a first comfortable position to a first initial position, eliminating the need to adjust the position of the lumbar support 20 body after each use, thus facilitating the next use. At the same time, the moving component 23 can move relative to the rotating component 21, thereby adjusting the position of the lumbar support 20 body according to actual usage needs, ensuring that the lumbar support 20 body can provide good support for the waist, thus effectively ensuring the comfort of the seat 100. Furthermore, the rotating component 21 and the moving component 23 work together to adapt to various sitting postures, thereby satisfying the multi-angle and multi-position adjustment of the lumbar support 20 body, thus effectively improving the self-adaptability of the seat 100 and effectively enhancing the user experience.

[0039] Furthermore, the rotating component 21 allows the lumbar support 20 to rotate relative to the backrest 10. When different forces are applied to the lumbar support 20, the lumbar support 20 can rotate relative to the backrest 10 via the rotating component 21, ensuring that the lumbar support 20 is in a suitable position and preventing gaps between the waist and the lumbar support 20, thus ensuring good support. Additionally, the first elastic component 22 can buffer the instantaneous impact on the rotating component 21, such as when a user suddenly sits on the seat, thereby reducing the risk of component wear or breakage.

[0040] According to the embodiment of the present invention, the seat 100 is provided with a rotating member 21, a first elastic member 22 and a moving member 23. The position of the lumbar support 20 body can be adjusted according to actual usage needs to ensure that the lumbar support 20 body can provide good support for the waist. At the same time, the rotating member 21 and the moving member 23 work together to adapt to various sitting postures, thereby satisfying the adjustment of the lumbar support 20 body at multiple angles and positions, thus effectively improving the self-adaptability of the seat 100 and effectively improving comfort.

[0041] According to some embodiments of this utility model, refer to Figure 2 , Figure 4 and Figure 5 The seat 100 includes: a first plate 30, which is fixedly connected to the backrest 10, and the first plate 30 and the rotating member 21 are aligned in a first direction (e.g., Figure 2 The rotatable component 21 is rotatably mounted on the first plate 30, arranged in a left-right direction as shown. Thus, the first plate 30 is fixed to the backrest 10, and the rotatable component 21 can rotate relative to the first plate 30. This allows the lumbar support 20 body to rotate relative to the backrest 10 through the interaction between the rotatable component 21 and the first plate 30. Furthermore, the first plate 30 facilitates a rotatable connection between the rotatable component 21 and the backrest 10, eliminating the need for direct connection between the rotatable component 21 and the backrest 10, thereby reducing installation difficulty.

[0042] For example, such as Figure 2 , Figure 4 and Figure 5 As shown, the first plate 30 extends in a plane perpendicular to the left and right direction, the rotating component 21 extends in a plane perpendicular to the left and right direction, the first plate 30 is fixedly connected to the backrest 10, and the first plate 30 and the rotating component 21 are arranged in the left and right direction.

[0043] According to some optional embodiments of the present invention, refer to Figure 2 , Figure 4 and Figure 5 The first plate 30 is provided with a first lug 31, and the rotating component 21 is provided with a second lug 211. The first lug 31 and the second lug 211 are in a third direction (e.g., Figure 2 The first elastic member 22 is arranged at intervals in the front-to-back direction (as shown), and the third direction is the thickness direction of the backrest 10. The two ends of the first elastic member 22 are respectively connected to the first lug 31 and the second lug 211.

[0044] In this way, the arrangement of the first lug 31 and the second lug 211 facilitates the placement of the first elastic element 22. At the same time, through the cooperation of the first elastic element 22 with the first lug 31 and the second lug 211, the rotating element 21 can be rotated relative to the first plate 30 via the first elastic element 22. Furthermore, the first lug 31 and the second lug 211 have simple structures and are easy to process, thereby improving the processing efficiency of the first plate 30 and the rotating element 21.

[0045] For example, such as Figure 2 , Figure 4 and Figure 5As shown, taking the rotating component 21 and the first plate 30 on the right as examples, the first plate 30 has a first lug 31 on the rear side of its upper side, which protrudes to the left in the left-right direction. The rotating component 21 has a second lug 211 on the front side of its upper side, which protrudes to the left in the left-right direction. The first lug 31 and the second lug 211 are arranged at intervals in the front-back direction. The first elastic component 22 is a spring, with the rear end of the first elastic component 22 connected to the first lug 31 and the front end of the first elastic component 22 connected to the second lug 211.

[0046] Furthermore, such as Figure 2 , Figure 4 and Figure 5 As shown, in the first initial position, the rotating member 21 is not compressed. When the lumbar support 20 body is subjected to a force applied by the waist, if the lumbar support 20 body drives the rotating member 21 to rotate backward from the first initial position, the second lug 211 rotates backward and squeezes the first elastic member 22 until the rotating member 21 is in the first comfortable position. The first elastic member 22 stores elastic force. When the force disappears, the first elastic member 22 releases elastic force and pushes the second lug 211 to rotate forward until the rotating member 21 is in the first initial position. If the lumbar support 20 body drives the rotating member 21 to rotate forward from the first initial position, the second lug 211 rotates forward and stretches the first elastic member 22 until the rotating member 21 is in the first comfortable position. The first elastic member 22 stores elastic force. When the force disappears, the first elastic member 22 releases elastic force and pulls the second lug 211 to rotate backward until the rotating member 21 is in the first initial position.

[0047] According to some embodiments of this utility model, refer to Figure 2 , Figure 4 and Figure 5 The seat 100 includes a first bracket 40, through which a first plate 30 is fixedly connected to the backrest 10. Thus, by setting the first bracket 40 to connect the first plate 30 to the backrest 10, the load of the first plate 30 can be transferred to the backrest 10 through the first bracket 40, thereby avoiding stress concentration and effectively preventing the first plate 30 from breaking. Simultaneously, it can compensate for dimensional mismatches between the first plate 30 and the backrest 10 due to manufacturing errors, thereby improving installation flexibility. Furthermore, the first bracket 40, as an intermediate component, facilitates the separate design of the backrest 10 and the lumbar support 20, making transportation, maintenance, or component replacement easier.

[0048] For example, such as Figure 2 Figure 4 and Figure 5 As shown, the lower end of the first bracket 40 is fixedly connected to the first plate 30, and the upper end of the first bracket 40 is fixedly connected to the chair back 10.

[0049] According to some optional embodiments of the present invention, refer to Figure 2 , Figure 4 and Figure 5 The seat 100 includes: a second support 50, one end of the second support 50 (e.g., Figure 2 The upper end of the second bracket 50 shown is connected to the backrest 10, and the other end of the second bracket 50 (as shown) Figure 2 The lower end of the second bracket 50 shown) and the rotating member 21 are both provided with a rotating shaft 212 and a shaft hole, respectively. That is, the other end of the second bracket 50 may have a rotating shaft 212 and the rotating member 21 may have a shaft hole, or the rotating member 21 may have a rotating shaft 212 and the other end of the second bracket 50 may have a shaft hole. The rotating shaft 212 is located along a first direction (e.g., Figure 2 It extends in the left and right directions and is rotatably fitted into the shaft hole.

[0050] By setting up the second bracket 50, the rotating component 21 can be connected to the chair back 10 via the second bracket 50, thereby effectively reducing the installation difficulty. At the same time, the rotating component 21 can rotate relative to the chair back 10 through the cooperation of the rotating shaft 212 and the shaft hole, thus enabling multi-angle adjustment of the lumbar support 20 relative to the chair back 10. Furthermore, the cooperation structure of the rotating shaft 212 and the shaft hole is simple, low-cost, and easy to manufacture, thus facilitating mass production. In addition, the second bracket 50, as an intermediate component, facilitates the separate design of the chair back 10 and the lumbar support 20, making transportation, maintenance, or component replacement easier.

[0051] For example, such as Figure 2 , Figure 4 and Figure 5 As shown, taking the rotating part 21 on the right as an example, the upper end of one end of the second bracket 50 is connected to the backrest 10, the lower end of the second bracket 50 is provided with a shaft hole, and the left side of the rotating part 21 is provided with a rotating shaft 212 extending to the left in the left-right direction. The rotating shaft 212 is rotatably fitted into the shaft hole.

[0052] According to some embodiments of this utility model, refer to Figure 4 , Figure 5 and Figure 6 The moving member 23 is relative to the rotating member 21 along the second direction (e.g. Figure 4 The lumbar support 20 (in the up-down direction shown) is movable between the second initial position and the second adaptive position. The lumbar support 20 also includes a second elastic member 25, which is connected between the rotating member 21 and the moving member 23, and the second elastic member 25 always pushes the moving member 23 toward the second initial position.

[0053] In this way, the movable component 23 can be adjusted to its position in the second direction according to actual needs, thus adapting to different lumbar heights and improving the comfort of the seat 100. Simultaneously, the second elastic component 25 can reset the movable component 23, eliminating the need to adjust the position of the lumbar support 20 after each use, facilitating subsequent use and effectively improving the user experience. Furthermore, the second elastic component 25 can cushion the movable component 23 from sudden impacts, such as when a user suddenly sits on the seat, thereby reducing the risk of component wear or breakage.

[0054] For example, such as Figure 4 , Figure 5 and Figure 6 As shown, the second elastic member 25 extends in the vertical direction, and the two ends of the second elastic member 25 are respectively connected to the moving member 23 and the rotating member 21.

[0055] According to some embodiments of this utility model, refer to Figure 4 , Figure 5 and Figure 6 The rotating member 21 is provided with a first protrusion 213, and the moving member 23 is provided with a second protrusion 231. The first protrusion 213 and the second protrusion 231 are along a second direction (e.g., Figure 4 The second elastic element 25 is arranged at intervals (as shown in the vertical direction), with its two ends connected to the first protrusion 213 and the second protrusion 231, respectively. Therefore, the first protrusion 213 and the second protrusion 231 facilitate the connection between the second elastic element 25 and the rotating element 21 and the moving element 23. Furthermore, the structure of the first protrusion 213 and the second protrusion 231 is simple and easy to manufacture. In addition, the first protrusion 213 and the second protrusion 231 can increase the contact area, thereby reducing stress concentration at the ends of the second elastic element 25 and effectively extending its service life.

[0056] For example, such as Figure 4 , Figure 5 and Figure 6 As shown, taking the rotating member 21 and the moving member 23 on the right as an example, the rotating member 21 is provided with a first protrusion 213, which protrudes to the left. The moving member 23 is provided with a second protrusion 231 and is located below the first protrusion 213. The second protrusion 231 protrudes to the left. The second elastic member 25 is a spring. The upper end of the second elastic member 25 is connected to the first protrusion 213, and the lower end of the second elastic member 25 is connected to the second protrusion 231.

[0057] Furthermore, such as Figure 4 , Figure 5 and Figure 6As shown, in the second initial position, the moving member 23 is not compressed. When the lumbar support 20 body is subjected to a force applied by the waist, if the lumbar support 20 body drives the moving member 23 to move upward from the second initial position, the second protrusion 231 moves upward and squeezes the second elastic member 25 until the moving member 23 is in the second comfortable position. The second elastic member 25 stores elastic force. When the force disappears, the second elastic member 25 releases elastic force and pushes the second protrusion 231 downward until the rotating member 21 is in the second initial position. If the lumbar support 20 body drives the moving member 23 to move downward from the second initial position, the second protrusion 231 moves downward and stretches the second elastic member 25 until the moving member 23 is in the second comfortable position. The second elastic member 25 stores elastic force. When the force disappears, the second elastic member 25 releases elastic force and pulls the second protrusion 231 upward to rotate until the moving member 23 is in the second initial position.

[0058] According to some embodiments of this utility model, refer to Figure 4 , Figure 5 and Figure 6 The movable component 23 is provided with a sliding groove 232, and the sliding groove 232 is along the second direction (e.g., Figure 4 Extending in the vertical direction shown, the rotating member 21 has a boss 214 on the side surface facing the moving member 23, and the boss 214 is slidably disposed in the sliding groove 232.

[0059] In this way, the sliding groove 232 is set to provide a clear movement trajectory for the boss 214, ensuring directional stability during linear movement. This ensures that the moving part 23 can move stably relative to the rotating part 21. At the same time, this kind of cooperation can meet the needs of supporting heavy objects or resisting vibration and impact. When the user suddenly sits on the seat 100, the impact resistance of the lumbar support 20 body can be guaranteed, thus ensuring the service life of the seat 100.

[0060] For example, such as Figure 4 , Figure 5 and Figure 6 As shown, taking the moving part 23 and rotating part 21 on the right as an example, the moving part 23 is provided with a sliding groove 232 extending in the vertical direction. The sliding groove 232 passes through the moving part 23 in the horizontal direction. The rotating part 21 is provided with a boss 214 protruding to the right on the lower side. The boss 214 is fitted into the sliding groove 232.

[0061] According to some optional embodiments of the present invention, refer to Figure 4 , Figure 5 and Figure 6 The seat 100 also includes: a mounting plate 60, which is fixedly connected to the boss 214, and the movable member 23 is provided along a first direction (e.g., Figure 4The guide groove 233 extends in the left-right direction (as shown), and the guide groove 233 is provided in the sliding groove 232 in the third direction (e.g., Figure 4 The mounting plate 60 is slidably fitted into the guide groove 233 on both sides of the front and rear directions (as shown).

[0062] By configuring the mounting plate 60, which slides within the guide groove 233, the moving accuracy and stability of the moving component 23 relative to the rotating component 21 can be further improved. Simultaneously, the rotating component 21 is connected to the moving component 23 via the mounting plate 60, and the mounting plate 60 engages with the bottom of the guide groove 233, preventing relative displacement between the rotating component 21 and the moving component 23 in the second direction, thus further ensuring the stability of the moving component 23's movement relative to the rotating component 21. Furthermore, both sides of the mounting plate 60 engage with the guide groove 233, allowing both sides of the mounting plate 60 to share the load, thereby preventing uneven force distribution that could lead to jamming or wear.

[0063] For example, such as Figure 4 , Figure 5 and Figure 6 As shown, taking the moving part 23 and rotating part 21 on the right as examples, the moving part 23 is provided with a guide groove 233 extending in the vertical direction. The guide groove 233 is provided on the two side walls of the sliding groove 232 in the front and rear directions. The front and rear sides of the mounting plate 60 are slidably fitted into the guide groove 233.

[0064] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The lumbar support 20 body includes a ring-shaped frame, a movable component 23 is disposed on the inner surface of the lumbar support 20 body, and a rotating component 21 is disposed on the side of the movable component 23 facing the interior of the lumbar support 20 body. Thus, both the movable component 23 and the rotating component 21 are disposed within the frame, so that the movable component 23 and the rotating component 21 do not occupy the space of the seat 100, thereby improving the space utilization rate within the frame and ensuring the rationality of the structural design.

[0065] For example, such as Figure 1 and Figure 2 The frame extends into a ring shape, with the front and rear sides of the frame open. The movable part 23 is located on the left or right surface inside the lumbar support 20 body, and the rotating part 21 is located on the side of the movable part 23 facing the inside of the lumbar support 20 body.

[0066] According to some optional embodiments of the present invention, refer to Figure 1 and Figure 2 The number of rotating parts 21 is two, and the two rotating parts 21 are along the first direction (e.g., Figure 1The moving parts 23 are symmetrically arranged in the frame in the left and right directions shown. There are two moving parts 23, which are symmetrically arranged in the frame along the first direction. The moving parts 23 correspond one-to-one with the rotating parts 21.

[0067] By defining two rotating parts 21 and two moving parts 23, it can be ensured that there are connection points on both sides of the frame that connect to the backrest 10, thereby ensuring the stability of the lumbar support 20 body relative to the backrest 10 during movement and rotation. At the same time, the moving parts 23 correspond one-to-one with the rotating parts 21, which can ensure that the lumbar support 20 body can move and rotate normally relative to the backrest 10.

[0068] For example, such as Figure 1 and Figure 2 As shown, there are two moving parts 23. The left moving part 23 is located on the left side of the inner side of the frame, and the right moving part 23 is located on the right side of the inner side of the frame. The left rotating part 21 is located on the right side of the left moving part 23, and the right rotating part 21 is located on the left side of the right moving part 23.

[0069] Furthermore, such as Figure 1 and Figure 2 As shown, there are two first plates 30, which are symmetrically arranged in the frame along the left and right direction, and each first plate 30 corresponds to a rotating component 21. The first bracket 40 and the second bracket 50 are formed in a herringbone shape. The two ends of the lower side of the first bracket 40 are respectively connected to the two first plates 30, and the two ends of the lower side of the second bracket 50 are respectively connected to the two rotating components 21.

[0070] Furthermore, such as Figure 1 and Figure 2 As shown, the seat 100 also includes a seat cushion 70, and the backrest 10 is fixedly connected to or rotatably connected to the seat cushion 70. This further enhances the comfort of the seat 100.

[0071] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0072] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0073] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A seat (100) characterized in that, include: Chair back (10); Lumbar support (20), said lumbar support (20) comprising: Rotating component (21) is rotatably disposed on the chair back (10) about an axis extending along a first direction, and is rotatable between a first initial position and a first adaptive position, wherein the first direction is the width direction of the chair back (10); The first elastic element (22) is disposed between the rotating element (21) and the chair back (10), and always pushes the rotating element (21) to rotate toward the first initial position; A movable member (23) is movably disposed on the rotating member (21) along a second direction, the second direction being the height direction of the chair back (10); The lumbar support (20) body is fixedly connected to the movable part (23) and is adapted to support the waist of the human body.

2. The seat (100) according to claim 1, characterized in that include: The first plate (30) is fixedly connected to the chair back (10). The first plate (30) and the rotating member (21) are arranged along the first direction. The rotating member (21) is rotatably disposed on the first plate (30).

3. The seat (100) according to claim 2, characterized in that The first plate (30) is provided with a first lug (31), and the rotating member (21) is provided with a second lug (211). The first lug (31) and the second lug (211) are arranged at intervals in a third direction, which is the thickness direction of the chair back (10). The two ends of the first elastic member (22) are respectively connected to the first lug (31) and the second lug (211).

4. The seat (100) according to claim 2, characterized in that include: The first bracket (40) and the first plate (30) are fixedly connected to the chair back (10) through the first bracket (40).

5. The seat (100) according to claim 1, characterized in that, include: The second bracket (50) has one end connected to the chair back (10), and the other end of the second bracket (50) and the rotating member (21) are provided with a rotating shaft (212) and a shaft hole, respectively. The rotating shaft (212) extends along the first direction and is rotatably fitted into the shaft hole.

6. The seat (100) according to claim 1, characterized in that, The moving member (23) is movable relative to the rotating member (21) along the second direction between a second initial position and a second adaptive position. The lumbar support (20) also includes a second elastic element (25), which is connected between the rotating element (21) and the moving element (23), and the second elastic element (25) always pushes the moving element (23) toward the second initial position.

7. The seat (100) according to claim 6, characterized in that, The rotating member (21) is provided with a first protrusion (213), and the moving member (23) is provided with a second protrusion (231). The first protrusion (213) and the second protrusion (231) are arranged at intervals along the second direction. The two ends of the second elastic member (25) are respectively connected to the first protrusion (213) and the second protrusion (231).

8. The seat (100) according to claim 1, characterized in that, The movable member (23) is provided with a sliding groove (232) and the sliding groove (232) extends along the second direction. The rotating member (21) has a boss (214) on one side surface facing the movable member (23), and the boss (214) is slidably disposed in the sliding groove (232).

9. The seat (100) according to claim 8, characterized in that, Also includes: Mounting plate (60), which is fixedly connected to the boss (214). The movable component (23) is provided with a guide groove (233) extending along the first direction. The guide groove (233) is provided on both side walls of the sliding groove (232) in the third direction. The mounting plate (60) is slidably fitted into the guide groove (233) on both sides of the third direction.

10. The seat (100) according to claim 1, characterized in that, The lumbar support (20) body includes an annular frame, the movable member (23) is disposed on the inner surface of the lumbar support (20) body, and the rotating member (21) is disposed on the side of the movable member (23) facing the interior of the lumbar support (20) body.

11. The seat (100) according to claim 10, characterized in that, There are two rotating parts (21), which are symmetrically arranged in the frame along the first direction. There are also two moving parts (23), which are symmetrically arranged in the frame along the first direction. The moving parts (23) correspond one-to-one with the rotating parts (21).

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