Seat lumbar support adjustment mechanism

Abstract

This utility model provides a seat lumbar support adjustment mechanism, including: a seat body, an extension adjustment mechanism and an angle adjustment mechanism on the rear side of the seat body, and a lumbar support provided on the rear side of the seat body through the extension adjustment mechanism and the angle adjustment mechanism. Compared with the prior art, this utility model has the following beneficial effects: by setting the extension adjustment mechanism, the position of the lumbar support can be adjusted back and forth to provide more personalized lumbar support, accurately conforming to the physiological curvature of the lumbar spine, effectively adapting to the lumbar curve and sitting posture needs of different users, reducing the fatigue and pressure of the lumbar muscles when sitting for a long time, thereby improving overall comfort and preventing back pain. By setting the angle adjustment mechanism, the tilt angle of the lumbar support can be adjusted to dynamically conform to the natural curvature of the lumbar spine, further reducing back fatigue and discomfort caused by prolonged sitting.

Description

Technical Field

[0001] This utility model belongs to the field of seat lumbar support, and specifically relates to a seat lumbar support adjustment mechanism. Background Technology

[0002] A lumbar support is a device specifically designed to support the lumbar spine, typically integrated into car seats, office chairs, or home seats. Its purpose is to alleviate lumbar pressure caused by prolonged sitting by providing additional support. Its core function is to fill the gap between the lumbar spine and the chair back, maintaining the natural curvature of the lumbar spine, thereby improving posture, distributing localized pressure, and preventing lumbar muscle strain. However, lumbar supports without an adjustable fore-and-aft mechanism have significant drawbacks, primarily poor adaptability and limited support. Firstly, fixed lumbar supports cannot accommodate the differences in the physiological curvature of the lumbar spine among different users. Since the lumbar lordosis angle varies from person to person, a fixed-position lumbar support may excessively push against the lumbar spine or provide insufficient support. Both of these situations disrupt the balance of spinal alignment, exacerbating compensatory muscle tension. Therefore, we aim to design a lumbar support adjustment mechanism to solve this problem. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a seat lumbar support adjustment mechanism to solve the problems mentioned in the background art.

[0004] This utility model is achieved through the following technical solution: a seat lumbar support adjustment mechanism, comprising: a seat body, an extension adjustment mechanism provided on the rear side of the seat body, an angle adjustment mechanism provided on the extension adjustment mechanism, and a lumbar support provided on the rear side of the seat body through the extension adjustment mechanism and the angle adjustment mechanism;

[0005] The extension adjustment mechanism includes a lifting component, and a drive component is provided on the rear side of the seat body;

[0006] The extension adjustment mechanism also includes a support block. Inside the support block, a threaded rod is sleeved via a bearing. The front end of the threaded rod is screwed with a support cylinder via a thread. By setting the extension adjustment mechanism, the position of the lumbar support can be adjusted forward and backward to provide more personalized lumbar support, precisely conforming to the physiological curvature of the lumbar spine, effectively adapting to the lumbar curve and sitting posture needs of different users, reducing fatigue and pressure on the lumbar muscles when sitting for a long time, thereby improving overall comfort and preventing lower back pain.

[0007] In a preferred embodiment, the lifting assembly includes a threaded rod, the lower end of which is fixedly connected to a secondary bevel gear, and the upper end of which is threadedly connected to a connecting cylinder, which is fixedly connected to the lower surface of the support block.

[0008] In a preferred embodiment, the drive assembly includes a connecting shaft, which is sleeved inside the seat body via a bearing. A drive bevel gear is fixedly connected to the front end of the connecting shaft, and the drive bevel gear meshes with a secondary bevel gear.

[0009] In a preferred embodiment, sliders are fixedly connected to the left and right sides of the support block, and the sliders are slidably fitted into the inside of the groove.

[0010] In a preferred embodiment, the angle adjustment mechanism includes a fixed shaft, which is fixedly sleeved inside the support cylinder. An insert plate is slidably sleeved on the outside of the fixed shaft, and a spring is provided on the outside of the fixed shaft.

[0011] In a preferred embodiment, one end of the spring is fixedly connected to the insert plate, and the other end of the spring is fixedly connected to the left end of the fixed shaft.

[0012] In a preferred embodiment, the rear side of the lumbar support has a through-hole for engaging with the insert plate. In another preferred embodiment, the front end of the support cylinder has a groove for limiting the angle of the lumbar support.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are:

[0014] 1. By setting up an extension adjustment mechanism, the position of the lumbar support can be adjusted forward and backward to provide more personalized lumbar support, accurately conforming to the physiological curvature of the lumbar spine, effectively adapting to the lumbar curve and sitting posture needs of different users, reducing the fatigue and pressure of the lumbar muscles when sitting for a long time, thereby improving overall comfort and preventing lower back pain.

[0015] 2. By setting up an angle adjustment mechanism, the lumbar support can dynamically conform to the natural curvature of the lumbar spine by adjusting the tilt angle, further reducing back fatigue and discomfort caused by prolonged sitting. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a rear perspective view of the overall structure of a seat lumbar support adjustment mechanism according to the present invention.

[0018] Figure 2 This is a partial exploded view of the lumbar support adjustment mechanism for a seat according to the present invention.

[0019] Figure 3 This utility model relates to a seat lumbar support adjustment mechanism. Figure 2 Enlarged view of part A of the structure.

[0020] Figure 4 This is a partial three-dimensional view of a seat lumbar support adjustment mechanism according to the present invention.

[0021] Figure 5 This is a partial exploded view of the angle adjustment mechanism of the seat lumbar support adjustment mechanism of this utility model.

[0022] In the diagram, 1-seat body, 2-extension adjustment mechanism, 3-angle adjustment mechanism, 4-lumbar support;

[0023] 11-Slide groove;

[0024] 21-Lifting assembly, 211-Threaded rod one, 212-Secondary bevel gear, 213-Connecting cylinder, 22-Drive assembly, 221-Connecting shaft, 222-Drive bevel gear, 23-Support block, 231-Slider, 24-Threaded rod two, 25-Support cylinder;

[0025] 3-Angle adjustment mechanism, 31-Fixed shaft, 32-Insertion plate, 33-Spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-4 As the first embodiment of this utility model:

[0028] A seat lumbar support adjustment mechanism includes: a seat body 1, an extension adjustment mechanism 2 disposed on the rear side of the seat body 1, an angle adjustment mechanism 3 disposed on the extension adjustment mechanism 2, and a lumbar support 4 disposed on the rear side of the seat body 1 via the extension adjustment mechanism 2 and the angle adjustment mechanism 3.

[0029] The extension adjustment mechanism includes a lifting assembly 21, and a drive assembly 22 is provided on the rear side of the seat body 1.

[0030] The extension adjustment mechanism 2 also includes a support block 23. The inside of the support block 23 is connected to a threaded rod 24 through a bearing. The front end of the threaded rod 24 is screwed with a support cylinder 25. By setting the extension adjustment mechanism, the position of the lumbar support 4 can be adjusted back and forth to provide more personalized lumbar support, accurately conform to the physiological curvature of the lumbar spine, effectively adapt to the lumbar curve and sitting posture needs of different users, reduce the fatigue and pressure of the lumbar muscles when sitting for a long time, thereby improving overall comfort and preventing back pain.

[0031] The lifting assembly 21 includes a threaded rod 211, the lower end of which is fixedly connected to a secondary bevel gear 212, and the upper end of the threaded rod 211 is threadedly connected to a connecting cylinder 213, which is fixedly connected to the lower surface of the support block 23.

[0032] The drive assembly 22 includes a connecting shaft 221, which is sleeved inside the seat body 1 via a bearing. A drive bevel gear 222 is fixedly connected to the front end of the connecting shaft 221, and the drive bevel gear 222 meshes with the secondary bevel gear 212.

[0033] Slider 231 is fixedly connected to the left and right sides of the support block 23, and slider 231 slides and fits into the inside of the groove 11.

[0034] Specifically, when the position of the lumbar support 4 needs to be adjusted, firstly, the connecting shaft 221 is rotated. During the rotation of the connecting shaft 221, the drive bevel gear is driven to rotate. During the rotation of the drive bevel gear, the secondary bevel gear 212 is driven to rotate. The secondary bevel gear 212 then drives the threaded rod 211 to rotate. During the rotation of the threaded rod 211, the threaded rod 211 undergoes threaded movement with the connecting cylinder 213, thereby causing the connecting cylinder 213 to drive the support block 23 to move, thus completing the height adjustment of the threaded rod 24. Then, the threaded rod 24 is rotated. During the rotation of the threaded rod 24, the threaded rod 24 undergoes threaded movement with the connecting cylinder 213, thereby causing the connecting cylinder 213 to drive the lumbar support 4 to move back and forth to conform to the physiological curvature of the lumbar spine and effectively adapt to the lumbar curve and sitting posture needs of different users.

[0035] Please see Figure 1 as well as Figure 5 As a second embodiment of this utility model:

[0036] The angle adjustment mechanism 3 includes a fixed shaft 31, which is fixedly sleeved inside the support cylinder 25. An insert plate 32 is slidably sleeved on the outside of the fixed shaft 31, and a spring 33 is provided on the outside of the fixed shaft 31.

[0037] One end of the spring 33 is fixedly connected to the insert plate 32, and the other end of the spring 33 is fixedly connected to the left end of the fixed shaft 31.

[0038] The rear side of the waist support 4 has a through-hole for cooperating with the insert plate 32.

[0039] The front end of the support cylinder 25 has a groove for limiting the angle of the lumbar support 4.

[0040] Based on the above embodiments, when it is necessary to adjust the angle of the lumbar support 4, first pull the insert plate 32. During the displacement of the insert plate 32, the spring 33 is compressed to deform it. When the insert rod on the insert plate 32 moves out of the through groove of the lumbar support 4, the angle of the lumbar support 4 can be adjusted. By adjusting the tilt angle of the lumbar support 4, it can dynamically conform to the natural curvature of the lumbar spine, further reducing back fatigue and discomfort caused by prolonged sitting.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A seat lumbar support adjustment mechanism, comprising: The seat body (1) is characterized in that an extension adjustment mechanism (2) is provided on the rear side of the seat body (1), an angle adjustment mechanism (3) is provided on the extension adjustment mechanism (2), and a lumbar support (4) is provided on the rear side of the seat body (1) through the extension adjustment mechanism (2) and the angle adjustment mechanism (3). The extension adjustment mechanism includes a lifting component (21), and a drive component (22) is provided on the rear side of the seat body (1). The extension adjustment mechanism (2) also includes a support block (23), inside which a threaded rod (24) is sleeved by a bearing, and the front end of the threaded rod (24) is screwed with a support cylinder (25).

2. The seat lumbar support adjustment mechanism as described in claim 1, characterized in that: The lifting assembly (21) includes a threaded rod (211), the lower end of which is fixedly connected to a secondary bevel gear (212), and the upper end of which is threadedly connected to a connecting cylinder (213), which is fixedly connected to the lower surface of the support block (23).

3. The seat lumbar support adjustment mechanism as described in claim 1, characterized in that: The drive assembly (22) includes a connecting shaft (221), which is sleeved inside the seat body (1) by a bearing. A drive bevel gear (222) is fixedly connected to the front end of the connecting shaft (221), and the drive bevel gear (222) meshes with the secondary bevel gear (212).

4. The seat lumbar support adjustment mechanism as described in claim 1, characterized in that: The left and right sides of the support block (23) are fixedly connected to sliders (231), and the sliders (231) are slidably fitted into the inside of the groove (11).

5. A seat lumbar support adjustment mechanism as described in claim 1, characterized in that: The angle adjustment mechanism (3) includes a fixed shaft (31), which is fixedly sleeved inside the support cylinder (25). A plate (32) is slidably sleeved on the outside of the fixed shaft (31), and a spring (33) is provided on the outside of the fixed shaft (31).

6. The seat lumbar support adjustment mechanism as described in claim 5, characterized in that: One end of the spring (33) is fixedly connected to the insert plate (32), and the other end of the spring (33) is fixedly connected to the left end of the fixed shaft (31).

7. A seat lumbar support adjustment mechanism as described in claim 1, characterized in that: The lumbar support (4) has a through-hole on its rear side for cooperating with the insert plate (32).

8. A seat lumbar support adjustment mechanism as described in claim 5, characterized in that: The front end of the support cylinder (25) is provided with a groove for limiting the angle of the lumbar support (4).

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