A chair with adjustable lumbar support and rotation
By introducing rotating parts and cam structures into the lumbar functional components of the office chair, combined with the spring automatic return function, the 90-degree rotation adjustment of the lumbar is achieved, solving the problem of the lumbar retention of the existing office chair and providing more flexible lumbar support and comfort.
Patent Information
- Application Number
- CN202510061698.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-04-04
AI Technical Summary
The lumbar support of the existing office chair cannot be rotated and cannot be adjusted dynamically according to the user's sitting posture changes, resulting in the user's continuous lumbar support when changing the sitting posture, which lacks flexibility.
A chair that can adjust the rotation of the waist is designed. By introducing a rotating member, a stationary cam, a rotating cam and a rotating shaft into the functional component of the waist is designed, and combined with the automatic spring reset function, the 90-degree rotation adjustment of the waist is achieved.
Through the pressing of the waist button and the automatic return mechanism of the spring, users can easily adjust the rotation angle of the waist, providing more flexible waist support, adapting to different sitting posture needs and improving the comfort of use.
Smart Images
Figure CN119745199A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of chairs, and in particular relates to a chair with adjustable lumbar support and rotation. Background Art
[0002] An office chair with a lumbar support is a piece of office furniture designed to provide lumbar support. Office chairs are usually equipped with a lumbar support. This design helps to relieve lumbar pressure and prevent back pain caused by long-term sitting. Correct lumbar support helps maintain the natural curve of the spine and prevent spinal problems caused by bad sitting posture. The lumbar support of existing office chairs cannot be rotated and adjusted, and the lumbar support cannot be dynamically adjusted according to the user's sitting posture changes, which means that users may not get continuous lumbar support when changing their sitting postures, resulting in a lack of flexibility. Summary of the invention
[0003] The invention solves the problem that the lumbar support of the prior art chair cannot be adjusted and rotated and lacks flexibility.
[0004] To achieve the above-mentioned purpose, the present invention provides a technical solution: a chair with adjustable lumbar support and rotation, comprising a back frame body, in which a lumbar support, a lumbar support functional component and a lumbar support button are arranged, wherein the lumbar support is arranged on one side of the lumbar support functional component and the lumbar support button is arranged on the other side.
[0005] Furthermore, the lumbar support functional component includes a rotating member, a stationary cam, a rotating cam and a rotating shaft. The rotating member forms a square groove through a pair of positioning plates. A positioning pin is provided at the end of the rotating shaft. The positioning plate of the rotating member passes through the stationary cam and the rotating cam and is inserted into the rotating shaft. The square groove is sleeved on the outside of the positioning pin. The rotating shaft is provided with a spring positioning member on the other side. A spring is sleeved on the outside of the rotating shaft. One side of the spring abuts against the spring positioning member and the other side abuts against the rotating cam. The surfaces of the stationary cam and the rotating cam are both provided with pawl structures.
[0006] Furthermore, the lumbar support includes a lumbar support PU pad, a lumbar support inner plate and a lumbar support outer cover. The lumbar support inner plate is provided with a lumbar support outer cover on one side and a lumbar support PU pad on the other side. The lumbar support outer cover is connected to the screw hole in the rotating part through a connecting screw.
[0007] Furthermore, a rotating member positioning ring is sleeved on the outer periphery of the rotating member, and the rotating member positioning ring is connected to the stationary cam. A connecting structure is provided on the edge of the rotating member, and the connecting structure is arranged between the rotating member positioning ring and the stationary cam.
[0008] Furthermore, the outer diameter of the spring positioning member is greater than the outer diameter of the rotating shaft, and the spring positioning member is connected to the rotating shaft via a screw.
[0009] Furthermore, a lumbar support button is sleeved on the outer side of the spring positioning member, a mounting portion with a hollow structure is provided in the back frame body, the lumbar support button is arranged in the mounting portion of the back frame body, a raised locking structure is provided on the outer periphery of the lumbar support button, a locking edge is provided on the inner wall of the opening on one side of the mounting portion, and the locking structure and the locking edge are limited.
[0010] Furthermore, the stationary cam is connected to an edge of another opening of the mounting portion via a screw.
[0011] Furthermore, the back frame body is provided with a back mesh on the surface of the waist support PU pad.
[0012] Furthermore, a headrest is provided on the top of the back frame body.
[0013] The present invention mainly has the following beneficial effects: when the user presses the lumbar support button forward to a fixed position, the spring is squeezed and contracted, and the locating pin of the rotating shaft falls on the semicircular top end (0 degrees) of the forward pawl structure of the stationary cam; when the user releases the lumbar support button, the rotating cam and the rotating shaft are automatically reset by the spring, and the locating pin of the rotating shaft falls on the semicircular bottom end (90 degrees) of the reverse pawl structure of the rotating cam; a square groove is provided in the middle of the rotating member, which is connected to the rotating shaft through the locating pin; the rotating shaft simultaneously drives the rotating member to rotate by degrees; therefore, the rotating member synchronously drives the lumbar support to realize the rotation function; in summary, each time the user presses the lumbar support button, the lumbar support makes a degree rotation movement, and the rotation of the lumbar support can be adjusted according to the needs of the user. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a front view of the present invention;
[0015] Figure 2 An exploded view of the present invention;
[0016] Figure 3 It is a front view of the waist support functional component of the present invention;
[0017] Figure 4 It is an exploded view of the lumbar support functional component of the present invention;
[0018] Figure 5 It is a cross-sectional view of the waist support functional component of the present invention installed in the back frame body;
[0019] Figure 6 It is a schematic diagram of a pawl structure in which a positioning pin of the present invention is arranged in a rotating cam;
[0020] Figure 7 It is a schematic diagram of the stationary cam structure of the present invention;
[0021] Figure 8 It is a schematic diagram of the waist support button of the present invention moving forward and backward;
[0022] Fig. 9 It is a schematic diagram of the lumbar support of the present invention rotating 90 degrees.
[0023] Figure numerals: back frame main body 100; lumbar support 110; lumbar support functional component 120; lumbar support button 130; rotating part 121; stationary cam 122; rotating cam 123; rotating shaft 124; positioning plate 125; square groove 126; positioning pin 127; spring positioning part 128; spring 129; pawl structure 101; lumbar support PU pad 111; lumbar support inner plate 112; lumbar support outer cover 113; rotating part positioning ring 102; connecting structure 103; headrest 12. DETAILED DESCRIPTION
[0024] like Figures 1 to 9 As shown, a chair with adjustable lumbar support rotation includes a back frame body 100, in which a lumbar support 110, a lumbar support functional component 120 and a lumbar support button 130 are provided. The lumbar support 110 is provided on one side of the lumbar support functional component 120 and the lumbar support button 130 is provided on the other side. Pressing the lumbar support button 130 controls the rotation of the lumbar support 110 through the lumbar support functional component 120.
[0025] The lumbar support functional component 120 includes a rotating member 121, a stationary cam 122, a rotating cam 123 and a rotating shaft 124. The rotating member 121 forms a square groove 126 through a pair of positioning plates 125. A positioning pin 127 is provided at the end of the rotating shaft 124. The positioning plate 125 of the rotating member 121 passes through the stationary cam 122 and the rotating cam 123 and is inserted into the rotating shaft 124. The square groove 126 is sleeved on the outer side of the positioning pin 127. The rotating shaft 124 is also provided with a spring positioning member 128. A spring 129 is sleeved on the outer side of the rotating shaft 124. One side of the spring 129 abuts against the spring positioning member 128 and the other side abuts against the rotating cam 123. The surfaces of the stationary cam 122 and the rotating cam 123 are both provided with a pawl structure 101. The lumbar support button 130 and the elastic force of the spring 129 push the positioning pin 127 to move up and down on the surface of the pawl structure 101.
[0026] During specific implementation, when the user presses the lumbar support button 130 forward to a fixed position, the spring 129 is squeezed and contracted, and the locating pin 127 of the rotating shaft 124 falls on the semicircular top (0 degrees) of the forward pawl structure 101 of the stationary cam 122. When the user releases the lumbar support button 130, the rotating cam 123 and the rotating shaft 124 are automatically reset by the spring 129, and the locating pin 127 of the rotating shaft 124 falls on the semicircular bottom (90 degrees) of the reverse pawl structure 101 of the rotating cam 123. A square groove 126 is provided in the middle of the rotating member 121, which is connected to the rotating shaft 124 through the locating pin 127. The rotating shaft 124 simultaneously drives the rotating member 121 to rotate 90 degrees. Therefore, the rotating member 121 synchronously drives the lumbar support 110 to realize the rotation function. In summary, each time the user presses the lumbar support button 130, the lumbar support 110 rotates 90 degrees.
[0027] The lumbar support 110 includes a lumbar support PU pad 111, a lumbar support inner plate 112 and a lumbar support outer cover 113. The lumbar support inner plate 112 is provided with a lumbar support outer cover 113 on one side and a lumbar support PU pad 111 on the other side. The lumbar support outer cover 113 is connected to the screw holes in the rotating member 121 by connecting screws, so that the rotating member 121 can drive the rotation of the lumbar support 110.
[0028] A rotating member positioning ring 102 is sleeved on the outer periphery of the rotating member 121, and the rotating member positioning ring 102 is connected to the stationary cam 122. A connecting structure 103 is provided on the edge of the rotating member 121, and the connecting structure 103 is arranged between the rotating member positioning ring 102 and the stationary cam 122. The rotating member positioning ring 102 can enable the rotating member 121 to rotate in the stationary cam 122 while preventing separation.
[0029] The outer diameter of the spring positioning member 128 is greater than the outer diameter of the rotating shaft 124. The spring positioning member 128 is connected to the rotating shaft 124 by screws. A waist support button 130 is sleeved on the outer side of the spring positioning member 128. A mounting portion 10 with a hollow structure is provided in the back frame body 100. The waist support button 130 is provided in the mounting portion 10 of the back frame body 100. A protruding engaging structure 131 is provided on the outer periphery of the waist support button 130. The inner wall of the opening on one side of the mounting portion 10 is provided with a There is a locking edge 11, and the locking structure 131 is limited by the locking edge 11. When the lumbar support button 130 stops being pressed, the spring 129 pushes the lumbar support button 130 to move outward, and the locking structure 131 is locked with the locking edge 11 to prevent the lumbar support button 130 from detaching from the back frame body 100. The stationary cam 122 is connected to the edge of the other opening of the mounting portion 10 by screws, so that the lumbar support functional component 120 and the back frame body 100 are installed.
[0030] The back frame body 100 is provided with a back mesh on the surface of the waist support PU pad 111. The back mesh is usually made of a special mesh fabric, and its structure can effectively promote air circulation and reduce the accumulation of sweat and moisture. This design is particularly important for people who sit on office chairs for a long time, because it can reduce the temperature of the contact surface between the back and the seat, reduce discomfort, and improve comfort.
[0031] The top of the back frame body 100 is provided with a headrest 12, which is mainly used to support the head and neck, maintain the natural curvature of the cervical spine, and reduce the pressure on the neck and shoulders. This is especially important for people who sit in office chairs for a long time, because it can help relieve neck fatigue caused by long-term sitting.
Claims
1. A chair with adjustable lumbar support and rotation, characterized in that: The invention comprises a back frame main body (100), wherein a waist support (110), a waist support functional component (120) and a waist support button (130) are arranged in the back frame main body (100); the waist support (110) is arranged on one side of the waist support functional component (120) and the waist support button (130) is arranged on the other side.
2. The chair with adjustable lumbar support and rotation according to claim 1, characterized in that: The lumbar support functional component (120) comprises a rotating member (121), a stationary cam (122), a rotating cam (123) and a rotating shaft (124); the rotating member (121) forms a square groove (126) through a pair of positioning plates (125); a positioning pin (127) is provided at the end of the rotating shaft (124); the positioning plate (125) of the rotating member (121) passes through the stationary cam (122) and the rotating cam (123) and is inserted into the rotating shaft (124); the square groove (126) is sleeved on the outer side of the positioning pin (127); the rotating shaft (124) is provided with a spring positioning member (128) on the other side; a spring (129) is sleeved on the outer side of the rotating shaft (124); one side of the spring (129 is in contact with the spring positioning member (128) and the other side is in contact with the rotating cam (123); the surfaces of the stationary cam (122) and the rotating cam (123) are both provided with a ratchet structure (101).
3. The chair with adjustable lumbar support and rotation according to claim 2, characterized in that: The lumbar support (110) comprises a lumbar support PU pad (111), a lumbar support inner plate (112) and a lumbar support outer cover (113); one side of the lumbar support inner plate (112) is provided with a lumbar support outer cover (113) and the other side is provided with a lumbar support PU pad (111); the lumbar support outer cover (113) is connected to a screw hole in a rotating member (121) via a connecting screw.
4. The chair with adjustable lumbar support and rotation according to claim 3, characterized in that: The outer periphery of the rotating member (121) is sleeved with a rotating member positioning ring (102), the rotating member positioning ring (102) is connected to a stationary cam (122), the edge of the rotating member (121) is provided with a connecting structure (103), and the connecting structure (103) is arranged between the rotating member positioning ring (102) and the stationary cam (122).
5. The chair with adjustable lumbar support and rotation according to claim 1, characterized in that: The outer diameter of the spring positioning member (128) is greater than the outer diameter of the rotating shaft (124), and the spring positioning member (128) is connected to the rotating shaft (124) via a screw.
6. The chair with adjustable lumbar support and rotation according to claim 1, characterized in that: The outer side of the spring positioning member (128) is sleeved with a lumbar support button (130); a mounting portion (10) with a hollow structure is provided in the back frame body (100); the lumbar support button (130) is arranged in the mounting portion (10) of the back frame body (100); a protruding snap-fit structure (131) is provided on the outer periphery of the lumbar support button (130); a snap-fit edge (11) is provided on the inner wall of an opening on one side of the mounting portion (10); the snap-fit structure (131) and the snap-fit edge (11) are limited in position.
7. The chair with adjustable lumbar support and rotation according to claim 6, characterized in that: The stationary cam (122) is connected to the edge of another opening of the mounting portion (10) via a screw.
8. The chair with adjustable lumbar support and rotation according to claim 7, characterized in that: The back frame main body (100) is provided with a back mesh cloth on the surface of the waist support PU pad (111).
9. The chair with adjustable lumbar support and rotation according to claim 8, characterized in that: A headrest (12) is provided on the top of the back frame main body (100).