Chair with waist rest capable of being adjusted up and down

Abstract

The utility model discloses a chair with a waist rest capable of being adjusted up and down, which comprises a chair back main body and a waist rest component, connecting bosses are arranged on two sides of the chair back main body, the waist rest component comprises a waist rest fixing piece, a waist rest pressing piece and a waist rest frame, arc-shaped grooves are arranged on two sides of the waist rest frame, and the waist rest fixing piece is connected with the arc-shaped grooves. The waist rest fixing piece penetrates through the sliding groove to be connected with the waist rest pressing piece. Sliding marbles are arranged in the waist rest pressing pieces on the two sides and arranged on the surfaces of the positioning tooth positions, and the waist rest fixing piece is connected with the connecting boss. The arc-shaped surface of the arc-shaped groove of the waist rest frame is matched with the waist rest fixing piece and is provided with a sliding groove, when the waist rest pressing piece and the sliding marble are locked and fixed, a whole is formed, and meanwhile, the waist rest frame can relatively slide up and down and move back and forth; according to the innovative structure, the function of adjusting in two directions is realized by utilizing the principle that vector positions are generated by cambered surface changes, the waist rest frame realizes the functions of moving up and down and moving back and forth on the surface of the chair back main body, the structure is simple, and the operation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of chair technology, specifically relating to a chair with an adjustable lumbar support. Background Technology

[0002] An office chair with a lumbar support is designed to provide lumbar support to help maintain proper posture and reduce discomfort or health problems that can result from prolonged sitting. Current office chairs have a fixed lumbar support and backrest, meaning there is no height adjustment. Since everyone's height and body type are different, a fixed lumbar support position may not provide optimal support for everyone. For taller or shorter individuals, a non-adjustable lumbar support may lead to insufficient or excessive lumbar support, causing discomfort or health problems.

[0003] Maintaining an incorrect sitting posture for a long time can lead to back fatigue and discomfort. If the lumbar support cannot be adjusted according to individual needs, users may find it difficult to find the most comfortable sitting posture, which in turn affects work efficiency and physical health. Utility Model Content

[0004] This solves the problem that the lumbar support of existing office chairs cannot be adjusted up and down.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a chair with an adjustable lumbar support, comprising a backrest body and a lumbar support assembly. The backrest body has connecting protrusions on both sides. The lumbar support assembly includes a lumbar support fixing member, a lumbar support pressing member, and a lumbar support frame. The lumbar support frame has arc-shaped grooves on both sides. The arc-shaped grooves have sliding grooves and a row of positioning teeth. The lumbar support fixing member passes through the sliding groove and connects to the lumbar support pressing member.

[0006] Both sides of the lumbar support are equipped with sliding balls, which are located on the surface of the positioning teeth. The lumbar support fixing parts are connected to the connecting bosses.

[0007] Furthermore, the lumbar support fastener has a connecting groove, which fits onto the outside of the connecting boss of the chair back body, and is then screwed into the connecting boss from the side of the lumbar support fastener by screws.

[0008] Furthermore, the lumbar support fastener has a pre-embedded M6 nut, and the lumbar support pressure piece is connected to the M6 ​​nut by an M6 screw.

[0009] Furthermore, the lumbar support clamp is locked to the lumbar support fastener with an M4 self-tapping screw.

[0010] Furthermore, the lumbar support frame is equipped with a mesh fabric.

[0011] Furthermore, a headrest is provided at the top of the main body of the chair back.

[0012] Furthermore, the positioning tooth is located on one side of the sliding groove.

[0013] The present invention has the following advantages: the lumbar support frame structure is designed with an arc-shaped groove that matches the lumbar support fixing part, and a sliding groove is designed. When the lumbar support pressing part and the sliding ball are locked and fixed, they will form a whole. At the same time, the lumbar support frame can realize the relative up and down sliding and back and forth movement functions. This innovative structure realizes the two-way adjustment function by using the principle of generating vector position by the change of arc surface. The lumbar support frame realizes the up and down movement and back and forth movement functions on the surface of the chair back body. The structure is simple and the operation is convenient. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 This is a schematic diagram showing the connection between the lumbar support frame, the lumbar support fixing component, and the lumbar support pressing component of this utility model;

[0017] Figure 4 This is a schematic diagram of the lumbar support frame structure of this utility model.

[0018] Reference numerals: backrest body 10; lumbar support assembly 20; connecting boss 11; lumbar support fastener 21; lumbar support pressure piece 22; lumbar support frame 23; arc-shaped groove 231; sliding groove 232; positioning tooth 233; sliding ball 221; mesh fabric 24; headrest 12. Detailed Implementation

[0019] like Figures 1 to 4 As shown, a chair with an adjustable lumbar support includes a backrest body 10 and a lumbar support assembly 20. The backrest body 10 has connecting bosses 11 on both sides. The lumbar support assembly 20 includes a lumbar support fixing member 21, a lumbar support pressing member 22, and a lumbar support frame 23. The lumbar support frame 23 has arc-shaped grooves 231 on both sides. The arc-shaped grooves 231 have sliding grooves 232 and a row of positioning teeth 233. The positioning teeth 233 are located on one side of the sliding grooves 232. The arc-shaped grooves 231 on both sides have a lumbar support fixing member 21 on one side and a lumbar support pressing member 22 on the other side. The lumbar support fixing member 21 passes through the sliding grooves 232 and is connected to the lumbar support pressing member 22 by screws.

[0020] Both sides of the lumbar support pressure member 22 are provided with sliding ball 221. When the lumbar support pressure member 22 is connected to the lumbar support fixing member 21, the sliding ball 221 is located on the surface of the positioning tooth position 233. The lumbar support fixing member 21 is provided with a connecting groove. The connecting groove is sleeved on the outside of the connecting boss 11 of the chair back body 10. Then, the lumbar support fixing member 21 is screwed to the connecting boss 11 from the side, so that the lumbar support assembly 20 and the chair back body 10 are assembled.

[0021] When in use, the lumbar support frame 23 has an arc-shaped groove that matches the lumbar support fixing part 21 and a sliding groove 232. When the lumbar support pressing part 22 and the sliding ball 221 are locked and fixed, they form a whole. At the same time, the lumbar support frame 23 realizes the function of relative up and down sliding and forward and backward movement. This innovative structure realizes the two-way adjustment function by using the principle of generating vector position by the change of arc surface.

[0022] M6 nuts are pre-embedded in the lumbar support fastener 21. The sliding ball 221 is placed in the hole of the lumbar support pressure member 22. The lumbar support pressure member 22 and the sliding ball 221 are placed together on the arc surface of the lumbar support frame. The positioning tooth 233 matches the sliding ball 221. The assembly is pressed down by hand. The lumbar support pressure members 22 on both sides of the lumbar support frame 23 are then locked to the lumbar support fasteners 21 on both sides with M6 fixing screws and M4 self-tapping screws respectively. Then the mesh fabric 24 of the lumbar support frame 23 is covered.

[0023] The headrest 12 is located on the top of the main body 10 of the chair back.

[0024] In summary, the lumbar support of this utility model is adjustable. The lumbar support frame 23 moves up and down and forward and backward on the surface of the chair back body 10. It has a simple structure and is easy to operate.

Claims

1. A chair with an adjustable lumbar support, characterized in that, The chair includes a backrest body (10) and a lumbar support assembly (20). The backrest body (10) has connecting bosses (11) on both sides. The lumbar support assembly (20) includes a lumbar support fixing member (21), a lumbar support pressing member (22) and a lumbar support frame (23). The lumbar support frame (23) has arc-shaped grooves (231) on both sides. The arc-shaped grooves (231) have sliding grooves (232) and a row of positioning teeth (233). The lumbar support fixing member (21) passes through the sliding groove (232) and connects to the lumbar support pressing member (22). Both sides of the waist support pressure member (22) are provided with sliding ball (221), which is located on the surface of the positioning tooth position (233). The waist support fixing member (21) is connected to the connecting boss (11).

2. The chair with adjustable lumbar support according to claim 1, characterized in that, The lumbar support fastener (21) has a connecting groove, which is fitted onto the outside of the connecting boss (11) of the chair back body (10), and then screwed into the connecting boss (11) from the side of the lumbar support fastener (21) by screws.

3. The chair with adjustable lumbar support according to claim 2, characterized in that, The lumbar support fastener (21) has a pre-embedded M6 nut, and the lumbar support pressure piece (22) is connected to the M6 ​​nut by an M6 screw.

4. The chair with adjustable lumbar support according to claim 3, characterized in that, The lumbar support clamp (22) is locked to the lumbar support fastener (21) by an M4 self-tapping screw.

5. The chair with adjustable lumbar support according to claim 4, characterized in that, The lumbar support frame (23) is provided with a mesh fabric (24).

6. The chair with adjustable lumbar support according to claim 5, characterized in that, The top of the main body of the chair back (10) is equipped with a headrest (12).

7. The chair with adjustable lumbar support according to claim 6, characterized in that, The positioning tooth (233) is located on one side of the sliding groove (232).

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