Waist support adjuster and seat

Abstract

The utility model discloses a waist support adjuster and a seat, and the waist support adjuster comprises an adjusting shell, a waist support and a waist support, the limiting plate is connected to the interior of the adjusting groove, a plurality of gear grooves are formed in one side of the limiting plate in the vertical direction, and the plane passing through the gear grooves serves as a positioning face; the top of the adjusting plate is inserted into the adjusting groove, the side, right facing the limiting plate, of the adjusting plate is rotationally connected with a rotating rod, the rotating rod is connected with a positioning column extending in the direction of the limiting plate, the adjusting plate is provided with an elastic piece, the elastic piece can enable the positioning column to rotate to the positioning face, and the elastic piece can enable the positioning column to rotate to the positioning face. The supporting position of the waist support can be rapidly adjusted, and use and operation are more convenient.

Description

Technical Field

[0001] The utility model relates to a chair component, in particular to a lumbar support adjuster and a seat. Background Art

[0002] In order to improve the comfort of using the seat, a lumbar support is installed at the position corresponding to the human waist on the seat, and the lumbar support is used to support the human waist, thereby improving the user experience. For users of different body shapes, the position where the lumbar support needs to be installed is also different. Some seats have an adjustable lumbar support structure. For example, a screw is provided between the seat and the lumbar support. By rotating the rotating pair of the screw, the lumbar support can be gradually lifted or pulled toward the seat, thereby adjusting the position of the lumbar support. However, the adjustment efficiency of this adjustment structure is low, especially when the lumbar support needs to be switched between two adjustment limit positions. It takes a long time, which affects the user experience. Therefore, there is an urgent need for an adjuster that can adjust the lumbar support more conveniently. Utility Model Content

[0003] The utility model aims to provide a lumbar support adjuster and a seat to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the utility model to solve the technical problem is:

[0005] A lumbar support adjuster comprises: an adjustment shell, the bottom side of which is provided with an adjustment slot; a limit plate connected to the adjustment slot, one side of the limit plate is provided with a gear slot, a plurality of the gear slots are provided up and down, and a plane passing through the plurality of the gear slots is used as a positioning surface; an adjustment plate, the top of which is inserted into the adjustment slot, a side of the adjustment plate facing the limit plate is rotatably connected with a rotating rod, a positioning column extending toward the limit plate is connected to the rotating rod, an elastic member is provided on the adjustment plate, and the elastic member can rotate the positioning column to the positioning surface.

[0006] The technical solution has at least the following beneficial effects: the top of the adjustment shell is rotatably connected to one of the lumbar support or the seat back, and the adjustable bottom is rotatably connected to the other of the lumbar support or the seat back. During normal use, the top of the adjustment plate is inserted into the adjustment groove. At this time, the elastic member causes the positioning column to rotate to a positioning surface passing through multiple gear slots, so that the positioning column can be kept stuck in one gear slot. When it is necessary to adjust the supporting position of the lumbar support, the adjustment plate is moved in the up and down directions to adjust the depth of insertion into the adjustment slot, thereby adjusting the up and down height of the entire lumbar support adjuster. At this time, the positioning column can elastically compress the elastic member so that the positioning column enters the adjacent gear slot. When it is necessary to adjust the supporting position of the lumbar support to a larger extent, the depth of the adjustment plate inserted into the adjustment slot can also be quickly adjusted so that the positioning column enters the gear slot at the corresponding position, thereby maintaining the support of the lumbar support. In this way, the supporting position of the lumbar support can be quickly adjusted, and the operation is more convenient.

[0007] As a further improvement of the above technical solution, the top surface of the limit plate and the lower side wall of the gear slot are both inclined and extended downward. When the positioning column enters the gear slot on the limit plate downward, it is guided by the inclined top surface of the limit plate, so that the positioning column can be better inserted into the gear slot located at the top side. Similarly, when the positioning column needs to be inserted into a different gear slot downward, it can be guided by the inclined lower side wall of the gear slot, so that the positioning column can enter the gear slot below more smoothly, improving the operating experience.

[0008] As a further improvement of the above technical solution, the bottom surface of the limit plate extends downwardly at an angle. When the positioning column moves to the bottom of the limit plate, the positioning column can return to the positioning surface position along the inclined lower bottom surface of the limit plate under the elastic force of the elastic member. At this time, the adjustment plate is inserted upward into the adjustment slot, so that the positioning column can move along the inclined lower bottom surface to the side of the limit plate away from the gear slot. As the adjustment plate continues to be inserted upward, the positioning column moves along the limit plate to the top of the limit plate, and returns to the positioning surface position under the elastic force of the elastic member, thereby resetting the gear position.

[0009] As a further improvement of the above technical solution, the elastic member includes two springs, which are respectively arranged in the adjustment plate at positions on both sides of the rotation direction of the rotating rod, and the ends of the two springs are respectively against the two sides of the rotating rod. When the rotating rod swings to any side, the springs on the corresponding side can be elastically compressed respectively. For example, when the adjustment plate is inserted into the adjustment slot, the positioning column moves along the top surface of the limit plate or the lower side wall of the gear slot toward the spring on the side close to the gear slot and compresses the spring. At this time, the spring can provide the elastic force for resetting the rotating rod; when the positioning column moves to the bottom surface of the limit plate, the positioning column moves along the bottom surface of the limit plate toward the spring on the side away from the gear slot and compresses the spring. At this time, the spring provides the elastic force for resetting the rotating rod.

[0010] As a further improvement of the above technical solution, first clamping columns are respectively connected to both sides of the adjustment groove, second clamping columns are respectively connected to both sides of the rotating rod, and both ends of the spring are respectively inserted into the outer sides of the first clamping columns and the second clamping columns. The first clamping column and the second clamping column can limit the two ends of the spring respectively, so that the spring can be quickly installed into the adjustment shell, and the two ends of the spring can be better limited to prevent the spring from sliding relative to the adjustment plate when elastically deformed.

[0011] As a further improvement of the above technical solution, the left and right sides of the adjustment plate are respectively provided with guide rails extending in the up-down direction, and the left and right side walls inside the adjustment groove are respectively provided with guide grooves extending in the up-down direction, and the two guide rails are respectively connected in cooperation with the two guide grooves. The adjustment plate is connected in the guide grooves on the left and right sides of the adjustment groove by sliding cooperation with the guide rails on the left and right sides, which can improve the stability of the cooperation between the adjustment plate and the adjustment shell, and when the position of the adjustment plate needs to be adjusted, the movement is smoother, further improving the use experience.

[0012] As a further improvement of the above technical solution, a convex rib is formed on the side of the adjustment plate facing the limit plate, the convex rib extends around the rotation rod below the rotation rod, and stop segments are formed at both ends of the rotation rod, and the two stop segments extend in a direction away from each other, and the rotation rod can be rotated to abut against any one of the stop segments. The convex rib can be used to further limit the movement of the rotation rod to limit the rotation amplitude of the rotation rod within the required range of movement. When the rotation rod rotates to one side of the limit plate, the rotation rod abuts against the stop segment on one side of the convex rib, and when the rotation rod rotates to the other side of the limit plate, the rotation rod abuts against the stop segment on the other side of the convex rib, so that the rotation rod can be prevented from excessive rotation, which is conducive to ensuring the stability of the structure.

[0013] As a further improvement of the above technical solution, the adjustment plate is connected with a fixed shaft, the bottom of the rotating rod is provided with a rotating hole, and the fixed shaft passes through the rotating hole. When installing the rotating rod, the rotating hole on the rotating rod and the fixed shaft are directly aligned with each other, and the rotating rod can be rotatably connected to the adjustment plate through the hole-shaft matching, and the overall structure is simple and easy to assemble.

[0014] A chair comprises a seat plate, a back frame, a lumbar support body and the above-mentioned lumbar support adjuster, wherein the back frame is arranged on the rear side of the seat plate, the top side of the lumbar support body is rotatably connected to the back frame, the top side of the adjustment shell is rotatably connected to the bottom side of the lumbar support body, and the bottom side of the adjustment plate is rotatably connected to the back frame.

[0015] This technical solution has at least the following beneficial effects: the upper and lower ends of the lumbar support body are rotatably connected to the back frame and the lumbar support adjuster respectively; during normal use, since the adjustment shell and the adjustment plate in the lumbar support adjuster are relatively fixed, the lumbar support body is relatively fixed to the back frame; when the position of the lumbar support body needs to be adjusted, the relative position of the adjustment plate between the adjustment shells is adjusted, thereby lifting or pulling the lumbar support body toward the back frame, so that the support position of the lumbar support can be quickly adjusted, and the operation is more convenient.

[0016] As a further improvement of the above technical solution, the bottom of the back frame is bent forward and connected to the bottom side of the seat plate. The bottom of the back frame is bent forward to form a portion connected to the seat plate, which can be directly installed on the bottom side of the seat plate, thereby realizing rapid installation and fixation of the back frame, without the need to configure a transition connection structural component between the seat plate and the back frame, thereby improving the convenience of overall assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following is a brief description of the drawings required for the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present utility model, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0018] Figure 1 The utility model is a front exploded schematic diagram of a lumbar support adjuster.

[0019] Figure 2 The utility model is a schematic exploded top view of a lumbar support adjuster.

[0020] Figure 3 It is a three-dimensional diagram of the waist support adjuster of the utility model after assembly.

[0021] Figure 4 The utility model is a three-dimensional diagram of the back frame, the waist support body and the waist support adjuster.

[0022] In the attached drawings: 100 - adjustment shell, 200 - limit plate, 210 - gear slot, 300 - adjustment plate, 310 - rotating rod, 311 - positioning column, 320 - spring, 330 - convex rib, 331 - stop segment, 340 - fixed shaft, 410 - back frame, 420 - lumbar support body. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are 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 cannot be understood as a limitation on the present invention.

[0025] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Reference Figure 1 , Figure 2 and Figure 3 , a lumbar support adjuster comprises an adjusting shell 100, a limiting plate 200 and an adjusting plate 300, wherein an adjusting slot is arranged on the bottom side of the adjusting shell 100; the limiting plate 200 is connected to the adjusting slot, a gear slot 210 is arranged on one side of the limiting plate 200, and a plurality of gear slots 210 are arranged up and down, with a plane passing through the plurality of gear slots 210 as a positioning surface; the top of the adjusting plate 300 is inserted into the adjusting slot, and the adjusting plate 300 can realize relative up and down movement with the adjusting shell 100 by mutual cooperation with the adjusting slot, and the adjusting plate 300 is rotatably connected with a rotating rod 310 on one side of the limiting plate 200, and a positioning column 311 extending in the direction of the limiting plate 200 is connected to the rotating rod 310, and an elastic member is arranged on the adjusting plate 300, and the elastic member can make the positioning column 311 rotate to the positioning surface.

[0028] As can be seen from the above, the top of the adjustment shell 100 is rotatably connected to one of the lumbar support or the seat back, and the bottom of the adjustment is rotatably connected to the other of the lumbar support or the seat back. In normal use, the top of the adjustment plate 300 is inserted into the adjustment slot. At this time, the elastic member causes the positioning column 311 to rotate to the positioning surface passing through multiple gear slots 210, and the positioning column 311 can be kept stuck in one gear slot 210. When the support position of the lumbar support needs to be adjusted, the adjustment plate 300 is moved in the up and down direction to adjust the insertion. The depth of the adjusting groove can be adjusted to adjust the upper and lower heights of the entire lumbar support adjuster. At this time, the positioning column 311 can elastically compress the elastic member so that the positioning column 311 enters the adjacent gear groove 210. When the supporting position of the lumbar support needs to be adjusted to a larger extent, the depth of the adjustment plate 300 inserted into the adjusting groove can also be quickly adjusted to allow the positioning column 311 to enter the gear groove 210 at the corresponding position, thereby maintaining the support for the lumbar support. In this way, the supporting position of the lumbar support can be quickly adjusted, and the operation is more convenient.

[0029] In actual applications, the limit plate 200 is connected to a fixed plate, and a fixed groove is provided on one side of the fixed plate. The limit plate 200 is connected to the bottom of the fixed groove. At this time, the positioning column 311 can move between the outer side of the limit plate 200 and the side wall of the fixed groove, which can better limit the movement of the positioning column 311, and the limit plate 200 can be connected to the inner wall of the adjustment groove through the fixed plate to realize modular installation.

[0030] In the above embodiment, the slot position of the limit plate 200 in the gear slot 210 can be an arc transition connection, so that the positioning column 311 can be smoothly switched between different gear slots 210. In order to improve the clamping and positioning effect of the positioning column 311 at one gear slot 210, a structure for guiding the positioning column 311 downward to the adjacent gear slot 210 can be provided on one side wall of the gear slot 210, and a straight structure can be provided on the other side of the gear slot 210 to prevent the positioning column 311 from moving upward into the adjacent gear slot 210. Specifically, the top surface of the limit plate 200 and the lower side wall of the gear slot 210 both extend downwardly inclined. When the positioning column 311 downwardly enters the gear slot 210 on the limit plate 200, it is guided by the inclined top surface of the limit plate 200, so that the positioning column 311 can be better inserted into the gear slot 210 located at the top side. Similarly, when the positioning column 311 needs to be inserted downward into a different gear slot 210, it can be guided by the inclined lower side wall of the gear slot 210, so that the positioning column 311 can enter the gear slot 210 below more smoothly, thereby improving the operating experience.

[0031] When it is necessary to move the positioning column 311 upward into the gear slot 210, since there is no structure in the above embodiment to guide the positioning column 311 upward to the adjacent gear slot 210, it is necessary to move the positioning column 311 downward to the bottom side of the limit plate 200, then bypass the limit plate 200 and away from the other side of the gear slot 210, and then reset upward to reposition the positioning column 311 again. Specifically, the bottom surface of the limit plate 200 extends downward at an angle. When the positioning column 311 moves to the bottom of the limit plate 200, the positioning column 311 can return to the positioning surface position along the inclined lower bottom surface of the limit plate 200 under the elastic force of the elastic member. At this time, the adjustment plate 300 is inserted upward into the adjustment groove, which can make the positioning column 311 move along the inclined lower bottom surface to the side of the limit plate 200 away from the gear groove 210. As the adjustment plate 300 continues to be inserted upward, the positioning column 311 moves above the limit plate 200 and returns to the positioning surface position under the elastic force of the elastic member, thereby resetting the gear position.

[0032] The elastic member is mainly used to provide a resetting driving force for the rotating rod 310 after rotation, and can be a structure such as rubber, torsion spring, elastic sheet, etc. In the present embodiment, the elastic member includes two springs 320, and the two springs 320 are respectively arranged in the adjustment plate 300 at positions on both sides of the rotation direction of the rotating rod 310, and the ends of the two springs 320 are respectively against the two sides of the rotating rod 310. When the rotating rod 310 swings to either side, the spring 320 on the corresponding side can be elastically compressed respectively. For example, when the adjusting plate 300 is inserted into the adjusting slot, the positioning column 311 moves along the top surface of the limiting plate 200 or the lower side wall of the gear slot 210 toward the spring 320 on the side close to the gear slot 210 and compresses the spring 320. At this time, the spring 320 can provide the elastic force for the rotating rod 310 to return to its original position; when the positioning column 311 moves to the bottom surface of the limiting plate 200, the positioning column 311 moves along the bottom surface of the limiting plate 200 toward the spring 320 on the side away from the gear slot 210 and compresses the spring 320. At this time, the spring 320 provides the elastic force for the rotating rod 310 to return to its original position.

[0033] In order to facilitate the positioning of the ends of the spring 320, in this embodiment, first clamping columns are respectively connected to both sides of the adjustment slot, and second clamping columns are respectively connected to both sides of the rotating rod 310, and the two ends of the spring 320 are respectively inserted into the outer sides of the first clamping column and the second clamping column. The first clamping column and the second clamping column can limit the two ends of the spring 320 respectively, so that the spring 320 can be quickly installed in the adjustment housing 100, and the two ends of the spring 320 can be better limited to prevent the spring 320 from sliding relative to the adjustment plate 300 when the spring 320 is elastically deformed.

[0034] The adjustment plate 300 moves in the adjustment groove, and there is an assembly gap between the two, so the two are prone to shaking when they move relative to each other. In order to improve the stability of the adjustment plate 300, in this embodiment, the left and right sides of the adjustment plate 300 are respectively provided with guide rails extending in the up-down direction, and the left and right side walls inside the adjustment groove are respectively provided with guide grooves extending in the up-down direction, and the two guide rails are respectively connected in the two guide grooves. In practical applications, two guide ribs arranged at intervals can be formed on the left side wall inside the adjustment groove, and the position between the two guide ribs forms a guide groove, and the left side of the adjustment plate 300 is directly convex to form a guide rail, which is connected with the guide groove. Similarly, the connection structure between the right side of the adjustment plate 300 and the right side of the adjustment groove is also the same. The adjustment plate 300 is connected to the guide grooves on the left and right sides of the adjustment groove by sliding and matching with the guide rails on the left and right sides, which can improve the stability of the adjustment plate 300 and the adjustment shell 100. When the position of the adjustment plate 300 needs to be adjusted, the movement is smoother, further improving the use experience.

[0035] In order to better limit the movable stroke of the rotating rod 310, in the present embodiment, a convex rib 330 is formed on the side of the adjusting plate 300 facing the limiting plate 200, and the convex rib 330 extends around the rotating rod 310 below the rotating rod 310, and stop sections 331 are respectively formed at both ends of the rotating rod 310, and the two stop sections 331 extend obliquely in directions away from each other, and the rotating rod 310 can be rotated to abut against any one of the stop sections 331. The convex rib 330 can be used to further limit the movement of the rotating rod 310 to limit the rotation amplitude of the rotating rod 310 within the required range of movement. When the rotating rod 310 rotates to one side of the limiting plate 200, the rotating rod 310 and the stop section 331 on one side of the convex rib 330 abut against each other. When the rotating rod 310 rotates to the other side of the limiting plate 200, the rotating rod 310 and the stop section 331 on the other side of the convex rib 330 abut against each other. This can prevent the rotating rod 310 from rotating excessively, which is beneficial to ensuring the stability of the structure.

[0036] The rotating rod 310 can be directly connected to the adjusting plate 300 by rotation through the bearing. In order to reduce the cost and improve the overall assembly efficiency, in this embodiment, the adjusting plate 300 is connected with a fixed shaft 340, and the bottom of the rotating rod 310 is provided with a rotating hole, and the fixed shaft 340 passes through the rotating hole. When installing the rotating rod 310, the rotating hole on the rotating rod 310 and the fixed shaft 340 are directly aligned with each other, and the rotating rod 310 can be rotatably connected to the adjusting plate 300 through the hole-shaft matching. The overall structure is simple and easy to assemble.

[0037] like Figure 4As shown, a chair includes a seat plate, a back frame 410, a lumbar support body 420 and the above-mentioned lumbar support adjuster, wherein the back frame 410 is arranged on the rear side of the seat plate, the top side of the lumbar support body 420 is rotatably connected to the back frame 410, and the rotation axis of the lumbar support body 420 installed on the back frame 410 extends in the left-right direction, the top side of the adjustment shell 100 is rotatably connected to the bottom side of the lumbar support body 420, and the rotation axis of the adjustment shell 100 on the lumbar support body 420 extends in the left-right direction, the bottom side of the adjustment plate 300 is rotatably connected to the back frame 410, and the rotation axis of the adjustment plate 300 on the back plate extends in the left-right direction. In the embodiment, the rotational connection installation between the adjustment shell 100 and the adjustment plate 300 can be directly rotationally connected through a bearing, or a rotating shaft is inserted into the adjustment shell 100 or the adjustment plate 300 to realize the rotational connection. For example, a through hole is provided at the top position of the adjustment shell 100, and the rotating shaft is inserted into the through hole, and the rotating shaft is connected to the lumbar support body 420 through the rotating shaft, so that the relative rotational connection between the adjustment shell 100 and the lumbar support body 420 can be realized; connecting columns are rotatably provided on the left and right sides of the bottom of the adjustment plate 300, and two holes are provided on the back frame 410, which are respectively matched with the connecting columns, so that the relative rotation of the adjustment plate 300 on the back frame 410 can be realized.

[0038] In this chair, the upper and lower ends of the lumbar support body 420 are rotatably connected to the back frame 410 and the lumbar support adjuster. During normal use, since the adjustment shell 100 and the adjustment plate 300 in the lumbar support adjuster are relatively fixed, the lumbar support body 420 is relatively fixed to the back frame 410. When the position of the lumbar support body 420 needs to be adjusted, the relative position of the adjustment plate 300 between the adjustment shell 100 is adjusted, so that the lumbar support body 420 is lifted or pulled toward the back frame 410. In this way, the support position of the lumbar support can be quickly adjusted, and the operation is more convenient.

[0039] In the above embodiment, a transition connection structure may be provided on the rear side of the bottom plate to install and fix the back frame 410. In order to simplify the overall installation structure, in this embodiment, the bottom of the back frame 410 is bent forward and connected to the bottom side of the seat plate. The bottom of the back frame 410 is bent forward to form a portion connected to the seat plate, which can be directly installed on the bottom side of the seat plate, thereby realizing the rapid installation and fixation of the back frame 410, and there is no need to configure a transition connection structural component between the seat plate and the back frame 410, thereby improving the convenience of overall assembly.

[0040] The preferred implementation modes of the present invention are specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A lumbar support adjuster, characterized in that: include: An adjustment shell (100) having an adjustment slot disposed on the bottom side; A limit plate (200) is connected to the adjustment groove, a gear groove (210) is provided on one side of the limit plate (200), a plurality of the gear grooves (210) are provided up and down, and a plane passing through the plurality of the gear grooves (210) is used as a positioning surface; The top of the adjusting plate (300) is inserted into the adjusting groove. The side of the adjusting plate (300) facing the limiting plate (200) is rotatably connected to a rotating rod (310). The rotating rod (310) is connected to a positioning column (311) extending in the direction of the limiting plate (200). An elastic member is provided on the adjusting plate (300), and the elastic member can enable the positioning column (311) to rotate onto the positioning surface.

2. A lumbar support adjuster according to claim 1, characterized in that: The top surface of the limiting plate (200) and the lower side wall of the shifting groove (210) both extend downwardly in an inclined manner.

3. A lumbar support adjuster according to claim 2, characterized in that: The bottom surface of the limiting plate (200) extends obliquely downward.

4. The lumbar support adjuster according to claim 1, characterized in that: The elastic member comprises two springs (320), the two springs (320) being respectively arranged in the adjustment plate (300) at positions on both sides of the rotation direction of the rotating rod (310), and the ends of the two springs (320) respectively abut against both sides of the rotating rod (310).

5. A lumbar support adjuster according to claim 4, characterized in that: The two sides of the adjustment slot are respectively connected to first clamping columns, the two sides of the rotating rod (310) are respectively connected to second clamping columns, and the two ends of the spring (320) are respectively inserted into the outer sides of the first clamping column and the second clamping column.

6. The lumbar support adjuster according to claim 1, characterized in that: The left and right sides of the adjustment plate (300) are respectively provided with guide rails extending in the up-down direction, and the left and right side walls inside the adjustment groove are respectively provided with guide grooves extending in the up-down direction, and the two guide rails are respectively matched and connected in the two guide grooves.

7. The lumbar support adjuster according to claim 1, characterized in that: A convex rib (330) is formed on one side of the adjustment plate (300) facing the limit plate (200), and the convex rib (330) extends around the rotating rod (310) below the rotating rod (310). Stop sections (331) are respectively formed at both ends of the rotating rod (310), and the two stop sections (331) extend obliquely in directions away from each other, and the rotating rod (310) can be rotated to abut against any one of the stop sections (331).

8. The lumbar support adjuster according to claim 1, characterized in that: The adjustment plate (300) is connected to a fixed shaft (340), and a rotation hole is provided at the bottom of the rotating rod (310), through which the fixed shaft (340) passes.

9. A seat, characterized in that: The invention comprises a seat plate, a back frame (410), a lumbar support body (420) and a lumbar support adjuster according to any one of claims 1 to 8, wherein the back frame (410) is arranged on the rear side of the seat plate, the top side of the lumbar support body (420) is rotatably connected to the back frame (410), the top side of the adjustment shell (100) is rotatably connected to the bottom side of the lumbar support body (420), and the bottom side of the adjustment plate (300) is rotatably connected to the back frame (410).

10. A seat according to claim 9, characterized in that: The bottom of the back frame (410) is bent forward and connected to the bottom side of the seat plate.

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