An office chair with adjustable lumbar support

Abstract

The application provides an office chair with adjustable waist support, and relates to the technical field of chairs. The office chair comprises a chair back, the chair back comprises a framework and a sheath wrapped on the framework, an adjustable waist support is arranged in the framework, the adjustable waist support comprises an adjusting part connected with the framework and a waist support plate connected with the adjusting part, the waist support plate is used for providing support for the waist of a user, and the adjusting part is used for adjusting the height position of the waist support plate. The adjustable waist support comprises the adjusting part and the waist support plate, the waist support plate is used for providing support for the waist of a user, and the adjusting part is used for adjusting the height position of the waist support plate, thereby allowing a user to adjust the height of the waist support plate according to the height, body shape and personal sitting posture habit of the user, meeting the use requirements of different users, and expanding the applicable population range of the office chair.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and more specifically, to an office chair with adjustable lumbar support. Background Technology

[0002] In modern office environments, people spend long hours sitting, putting significant pressure on their lower backs. Inappropriate posture and lack of effective lumbar support can easily lead to lower back fatigue, soreness, and even lumbar spine diseases. Therefore, office chairs with good lumbar support are crucial for protecting the health of office workers.

[0003] While some office chairs on the market currently feature lumbar supports, their designs often have limitations: many lumbar supports are in a fixed position. Because everyone's body characteristics and sitting habits differ, fixed-position lumbar supports cannot provide precise and comfortable lumbar support for all users. This results in some users still not effectively relieving lumbar pressure and failing to fully utilize the intended function of the lumbar support. Therefore, we have made improvements by proposing an office chair with an adjustable lumbar support. Utility Model Content

[0004] This utility model provides an office chair with adjustable lumbar support, including a backrest. The backrest includes a frame and a cover covering the frame. An adjustable lumbar support is provided inside the frame. The adjustable lumbar support includes an adjustment part connected to the frame and a lumbar support plate connected to the adjustment part. The lumbar support plate is used to provide support for the user's waist, and the adjustment part is used to adjust the height position of the lumbar support plate.

[0005] As a preferred technical solution of this application, the adjustment part includes two first card seats disposed on the side of the frame facing the user's back, and a screw is rotatably disposed between the two first card seats. The outer surface of the screw is provided with a transmission component, and the transmission component is connected to the waist support plate.

[0006] As a preferred technical solution of this application, the transmission component includes a slide that is threaded onto the outer surface of the screw, the slide being connected to a connecting frame, and the connecting frame being connected to a waist support plate.

[0007] As a preferred technical solution of this application, the frame is provided with two limiting plates, and the sides of the two limiting plates that are close to each other are slidably connected to the slide.

[0008] As a preferred technical solution of this application, a second card seat is provided on the side of the first card seat near the waist support plate, and the second card seat is rotatably connected to the end of the screw.

[0009] As a preferred technical solution of this application, the side of the lumbar support plate facing the user's back is an arc-shaped surface.

[0010] As a preferred technical solution of this application, the back of the frame is provided with a notch, and a dial wheel is fixedly connected to the outer surface of the screw, with one side of the dial wheel extending from the notch to the outside of the frame.

[0011] As a preferred technical solution of this application, the outer circumferential surface of the dial is provided with anti-slip texture.

[0012] As a preferred technical solution of this application, the frame is provided with a number of ventilation holes.

[0013] As a preferred technical solution of this application, the frame is connected to a seat.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In the scheme of this application:

[0016] This application features an adjustable lumbar support, which includes an adjustment mechanism and a lumbar support plate. The lumbar support plate provides support for the user's lower back, and the adjustment mechanism allows users to adjust the height of the lumbar support plate according to their height, body type, and personal sitting habits, thereby meeting the needs of different users and expanding the range of people who can use the office chair. Attached Figure Description

[0017] Figure 1 A structural diagram of the adjustable lumbar support office chair provided in this application;

[0018] Figure 2 A rear-view structural diagram of the adjustable lumbar support office chair provided in this application;

[0019] Figure 3 Exploded view of the chair back provided for this application;

[0020] Figure 4 A schematic diagram of the structure after the skeleton and sheath are separated, as provided in this application;

[0021] Figure 5 A schematic diagram of the connecting frame provided in this application;

[0022] Figure 6 Provided for this application Figure 5 Enlarged structural diagram at point A in the middle;

[0023] Figure 7 This is a schematic diagram of the structure of the slide provided in this application;

[0024] Figure 8 Provided for this application Figure 7 Enlarged structural diagram at point B;

[0025] Figure 9This is a structural diagram of the connecting frame and waist support plate provided in this application.

[0026] The image shows:

[0027] 1. Chair back; 101. Frame; 102. Cover; 103. Vent; 2. Adjustable lumbar support; 201. First seat; 202. Limiting plate; 203. Second seat; 204. Screw; 205. Slide; 206. Dial wheel; 207. Connecting frame; 208. Lumbar support plate; 209. Notch; 3. Chair seat. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0029] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] Example 1, please refer to Figures 1-9 An adjustable lumbar support office chair includes a backrest 1, which includes a frame 101 and a cover 102 covering the frame 101. An adjustable lumbar support 2 is provided inside the frame 101. The adjustable lumbar support 2 includes an adjustment part connected to the frame 101 and a lumbar support plate 208 connected to the adjustment part. The lumbar support plate 208 is used to provide support for the user's waist, and the adjustment part is used to adjust the height position of the lumbar support plate 208, thereby allowing the user to adjust the height of the lumbar support plate 208 according to their own height, body shape and personal sitting habits, so as to meet the usage needs of different users and expand the applicable population of the office chair. The adjustable lumbar support 2 is located inside the cover 102.

[0032] Furthermore, the adjustment unit includes two first brackets 201 disposed on the side of the frame 101 facing the user's back, and a screw 204 is rotatably disposed between the two first brackets 201. A transmission component is provided on the outer surface of the screw 204, and the transmission component is connected to the lumbar support plate 208. During the rotation of the screw 204, the lumbar support plate 208 can be driven to rise and fall through the transmission component, so that the height of the lumbar support plate 208 can be adjusted.

[0033] Furthermore, the transmission component includes a slide 205 threaded onto the outer surface of the screw 204. The slide 205 is connected to a connecting frame 207, and the connecting frame 207 is connected to the waist support plate 208. The connecting frame 207 and the slide 205 are integrally formed. The integrally formed connecting frame 207 and the slide 205 ensure the connection strength and stability between the two. The connecting frame 207 and the waist support plate 208 are connected by bolts.

[0034] Furthermore, the frame 101 is provided with two limiting plates 202, and the sides of the two limiting plates 202 that are close to each other are slidably connected to the slide 205. The limiting plates 202 can limit the slide 205, so that the slide 205 can only move up and down, so as to avoid the situation where the slide 205 rotates with the screw 204 and causes the waist support plate 208 to shift, thereby improving the stability of the height adjustment of the waist support plate 208.

[0035] Furthermore, a second bracket 203 is provided on the side of the first bracket 201 near the waist support plate 208, and the second bracket 203 is rotatably connected to the end of the screw 204. The second bracket 203 and the first bracket 201 are connected by bolts. The second bracket 203 and the first bracket 201 clamp and limit the screw 204 under the action of the bolts, but the tightness of the clamping allows the screw 204 to rotate. The friction between the second bracket 203 and the first bracket 201 and the screw 204 can reduce the situation where the screw 204 rotates on its own and changes the height of the waist support plate 208, thereby improving the stability of the height of the waist support plate 208.

[0036] Furthermore, the side of the lumbar support plate 208 facing the user's back is curved, and memory foam is provided on the curved surface to adapt to the shape of the user's waist and provide more comfortable lumbar support.

[0037] Example 2 further optimizes the adjustable lumbar support office chair provided in Example 1. Specifically, a notch 209 is provided on the back of the frame 101, and a dial 206 is fixedly connected to the outer surface of the screw 204. One side of the dial 206 extends from the notch 209 to the outside of the frame 101. The screw 204 can be driven to rotate by turning the dial 206 with a finger from the back of the chair back 1.

[0038] Furthermore, the outer circumferential surface of the dial 206 is provided with anti-slip texture, making it easier for the user to rotate it more stably.

[0039] Furthermore, the frame 101 is provided with several ventilation holes 103, and the sheath 102 is made of breathable fabric. The ventilation holes 103 can improve the breathability of the frame 101.

[0040] Example 3 further optimizes the adjustable lumbar support office chair provided in Example 1 or 2, specifically, as follows: Figures 1-2 As shown, the frame 101 is connected to the seat 3, and the seat 3 can adopt a structure commonly used in the market.

[0041] Using your fingers, you can turn the dial 206 from the back of the chair back 1. The dial 206 drives the screw 204 to rotate. During the rotation of the screw 204, the slide 205 moves up and down. The slide 205, through the connecting bracket 207, drives the lumbar support plate 208 to move up and down, thus adjusting the height of the lumbar support plate 208.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. An adjustable office chair with lumbar support, comprising a chair back (1), the chair back (1) comprising a framework (101) and a sheath (102) wrapped on the framework (101), characterized in that, An adjustable lumbar support (2) is provided inside the frame (101). The adjustable lumbar support (2) includes an adjustment part connected to the frame (101) and a lumbar support plate (208) connected to the adjustment part. The lumbar support plate (208) is used to provide support for the user's waist, and the adjustment part is used to adjust the height position of the lumbar support plate (208). The adjustment unit includes two first brackets (201) disposed on the side of the frame (101) facing the user's back, and a screw (204) is rotatably disposed between the two first brackets (201). The outer surface of the screw (204) is provided with a transmission component, and the transmission component is connected to the waist support plate (208). The transmission component includes a slide (205) threaded onto the outer surface of the screw (204), the slide (205) being connected to a connecting frame (207), and the connecting frame (207) being connected to a waist support plate (208); The back of the frame (101) is provided with a notch (209), and a dial wheel (206) is fixedly connected to the outer surface of the screw (204). One side of the dial wheel (206) extends from the notch (209) to the outside of the frame (101).

2. The lumbar support adjustable office chair of claim 1, wherein, The frame (101) is provided with two limiting plates (202), and the sides of the two limiting plates (202) that are close to each other are slidably connected to the slide (205).

3. The lumbar support adjustable office chair of claim 2, wherein, The first card holder (201) has a second card holder (203) on the side near the waist support plate (208), and the second card holder (203) is rotatably connected to the end of the screw (204).

4. The lumbar support adjustable office chair of claim 1, wherein, The side of the lumbar support (208) facing the user's back is curved.

5. The lumbar support adjustable office chair of claim 1, wherein, The outer circumferential surface of the dial (206) is provided with anti-slip texture.

6. The lumbar support adjustable office chair of claim 1, wherein, The frame (101) is provided with several air vents (103).

7. The lumbar support adjustable office chair of claim 1, wherein, The frame (101) is connected to the seat (3).

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