Ergonomic chair with backrest three-axis movement

Abstract

The utility model belongs to technical field discloses a kind of ergonomic chair of backrest three-axis movement, including chair surface, the bottom end of chair surface is fixedly connected with guide box, the inner side surface of guide box is slidably connected with T-shaped frame, the right end of T-shaped frame is fixedly connected with shock absorber, the other end of shock absorber is fixedly connected with intermediate block, the one end of intermediate block close to guide box is fixedly connected with reset spring rod, the other end of reset spring rod is fixedly connected with strip frame, the upper end of strip frame is fixedly connected with stand, the outer side surface of stand is rotatably connected with chair back, the left end of chair back is fixedly connected with waist rest, the outer side surface of waist rest is abutted with elastic net surface, the upper and lower ends of elastic net surface are fixedly connected with the left end of chair back, the upper end of chair back is clamped with neck rest, the design solves the problem that different users' body shape and posture and handrail are difficult to accurately adjust.

Description

Technical Field

[0001] This utility model belongs to the field of ergonomic chair technology, and in particular relates to an ergonomic chair with a three-axis movable backrest. Background Technology

[0002] Ergonomic chairs are health chairs designed based on ergonomic principles. They reduce the pressure of prolonged sitting by scientifically supporting key parts. However, existing ergonomic chairs often have difficulty adapting to people of different heights and continue to conform to the user's back when the user turns around. In addition, the armrests of existing ergonomic chairs are difficult to adjust precisely, affecting the overall adaptability and practicality. Utility Model Content

[0003] This utility model addresses the problems in existing technologies, such as the difficulty in adapting to different user body shapes and postures and the difficulty in precisely adjusting armrests, and proposes the following technical solution: An ergonomic chair with a three-axis movable backrest includes a seat surface. A guide box is fixedly connected to the bottom end of the seat surface. A T-shaped frame is slidably connected to the inner surface of the guide box. A shock absorber is fixedly connected to the right end of the T-shaped frame. A middle block is fixedly connected to the other end of the shock absorber. A return spring rod is fixedly connected to the end of the middle block near the guide box. A strip frame is fixedly connected to the other end of the return spring rod. A column is fixedly connected to the upper end of the strip frame.

[0004] As a preferred embodiment of the above technical solution, a chair back is rotatably connected to the outer surface of the column, a lumbar support is fixedly connected to the left end of the chair back, an elastic mesh surface is abutted to the outer surface of the lumbar support, the upper and lower ends of the elastic mesh surface are fixedly connected to the left end of the chair back, and a neck rest is snapped onto the upper end of the chair back.

[0005] As a preferred embodiment of the above technical solution, an auxiliary threaded post is rotatably connected to the right end of the chair back, an auxiliary knob is fixedly connected to the upper end of the auxiliary threaded post, a U-shaped tooth condition is threaded on the outer surface of the auxiliary threaded post, and the left end of the U-shaped tooth condition is slidably connected to the right end of the chair back.

[0006] As a preferred embodiment of the above technical solution, a lateral gear is meshed with the outer surface of the U-shaped tooth condition, a bevel gear one is fixedly connected to the left end of the lateral gear, a bevel gear two is meshed with the outer surface of the bevel gear one, and a handrail is fixedly connected to the end of the bevel gear two away from the guide box.

[0007] As a preferred embodiment of the above technical solution, an auxiliary frame is fixedly connected to the right end of the strip frame, and a spring telescopic rod is rotatably connected to the upper end of the auxiliary frame. The other end of the spring telescopic rod is rotatably connected to the right end of the chair back.

[0008] As a preferred embodiment of the above technical solution, an adjusting threaded rod is rotatably connected to the inner surface of the guide box, the outer surface of the adjusting threaded rod is threadedly connected to the inner surface of the T-shaped frame, a cross knob is fixedly connected to the bottom end of the adjusting threaded rod, a bracket is fixedly connected to the bottom end of the seat, a leg is slidably connected to the inner surface of the bracket, and several universal wheels are rotatably connected to the bottom end of the leg.

[0009] The beneficial effects of this utility model are as follows: Through the threaded transmission of the auxiliary threaded column and the U-shaped tooth condition, and the meshing transmission of the U-shaped tooth condition and the side gear, turning the auxiliary knob can drive the first bevel gear to rotate, and through the meshing transmission of the first bevel gear and the second bevel gear, the angle of the armrest can be adjusted so that the armrest can be folded up to increase the range of arm movement. At the same time, it can also adapt to the habits of different users, improving the overall reliability and practicality. The linkage of shock absorbers, intermediate blocks, and return spring rods ensures smooth horizontal movement of the bar frame and allows the chair back to move horizontally. Furthermore, by adjusting the threaded transmission between the threaded rod and the T-shaped frame, and the guide box's limiting of the T-shaped frame, the chair back height can be adjusted, thus achieving three-axis movement control of the chair back. This adapts to users with different habits and heights, improving overall adaptability. Attached Figure Description

[0010] Figure 1 The image shown is a three-dimensional view of an ergonomic chair with a three-axis movable backrest. Figure 2 This is a perspective view of an ergonomic chair with a three-axis movable backrest. Figure 3 The diagram shows some parts of an ergonomic chair with a three-axis movable backrest. Figure 4 The diagram shown is a partial schematic of a three-axis movable ergonomic chair with a backrest, viewed from another angle.

[0011] In the diagram: 1. Seat surface; 2. Guide box; 3. T-shaped frame; 4. Shock absorber; 5. Middle block; 6. Return spring rod; 7. Strip frame; 8. Upright column; 9. Backrest; 10. Lumbar support; 11. Elastic mesh surface; 12. Neck support; 13. Auxiliary threaded column; 14. Auxiliary knob; 15. U-shaped gear; 16. Side gear; 17. Bevel gear one; 18. Bevel gear two; 19. Armrest; 20. Auxiliary frame; 21. Spring telescopic rod; 22. Adjusting threaded rod; 23. Cross knob; 24. Bracket; 25. Leg; 26. Casters. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0013] Example 1 This utility model provides an ergonomic chair with a three-axis movable backrest, such as... Figures 1 to 4 As shown, the chair includes a seat 1, a guide box 2 fixedly connected to the bottom end of the seat 1, a T-shaped frame 3 slidably connected to the inner surface of the guide box 2, a shock absorber 4 fixedly connected to the right end of the T-shaped frame 3, a middle block 5 fixedly connected to the other end of the shock absorber 4, a return spring rod 6 fixedly connected to the end of the middle block 5 near the guide box 2, a strip frame 7 fixedly connected to the other end of the return spring rod 6, a column 8 fixedly connected to the upper end of the strip frame 7, an adjusting threaded rod 22 rotatably connected to the inner surface of the guide box 2, the outer surface of the adjusting threaded rod 22 threadedly connected to the inner surface of the T-shaped frame 3, and a column 8 fixedly connected to the bottom end of the adjusting threaded rod 22. A cross knob 23 is used. A bracket 24 is fixedly connected to the bottom of the seat 1. A foot bracket 25 is slidably connected to the inner surface of the bracket 24. Several casters 26 are rotatably connected to the bottom of the foot bracket 25. Through the linkage of the shock absorber 4, the middle block 5 and the return spring rod 6, the movement of the strip frame 7 in the horizontal direction can be ensured, and the chair back 9 can move in the horizontal direction. Furthermore, by adjusting the threaded transmission between the threaded rod 22 and the T-shaped frame 3 and the limit of the T-shaped frame 3 by the guide box 2, the height of the chair back 9 can be adjusted, thereby realizing three-axis movement control of the chair back 9, adapting to users with different habits and heights, and improving the overall adaptability.

[0014] like Figures 1 to 4As shown, a chair back 9 is rotatably connected to the outer surface of the upright 8. A lumbar support 10 is fixedly connected to the left end of the chair back 9. An elastic mesh surface 11 abuts against the outer surface of the lumbar support 10. The upper and lower ends of the elastic mesh surface 11 are fixedly connected to the left end of the chair back 9. A neck support 12 is snapped onto the upper end of the chair back 9 to support the user's neck. An auxiliary threaded post 13 is rotatably connected to the right end of the chair back 9. An auxiliary knob 14 is fixedly connected to the upper end of the auxiliary threaded post 13. A U-shaped tooth condition 15 is threaded onto the outer surface of the auxiliary threaded post 13. The left end of the U-shaped tooth condition 15 is slidably connected to the right end of the chair back 9. A lateral gear 16 is meshed onto the outer surface of the U-shaped tooth condition 15. A bevel gear 17 is fixedly connected to the left end of the lateral gear 16. A bevel gear 18 is meshed onto the outer surface of the bevel gear 17. An armrest 1 is fixedly connected to the end of the bevel gear 18 away from the guide box 2. 9. An auxiliary frame 20 is fixedly connected to the right end of the bar frame 7. A spring telescopic rod 21 is rotatably connected to the upper end of the auxiliary frame 20. The other end of the spring telescopic rod 21 is rotatably connected to the right end of the chair back 9. When the user's back abuts against the elastic mesh surface 11, the reset action of the spring telescopic rod 21 can drive the elastic mesh surface 11 to conform to the user's back and ensure the stability of the chair back 9 when not in use, thereby improving the overall stability and functionality. Through the threaded transmission of the auxiliary threaded column 13 and the U-shaped tooth condition 15 and the meshing transmission of the U-shaped tooth condition 15 and the side gear 16, turning the auxiliary knob 14 can drive the bevel gear 17 to rotate. Through the meshing transmission of the bevel gear 17 and the bevel gear 18, the angle of the armrest 19 can be adjusted so that the armrest 19 can be folded up to increase the range of motion of the arms. At the same time, it can also adapt to the habits of different users, thereby improving the overall reliability and practicality.

[0015] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. An ergonomic chair with a three-axis movable backrest, characterized in that, The chair includes a seat (1), a guide box (2) is fixedly connected to the bottom end of the seat (1), a T-shaped frame (3) is slidably connected to the inner surface of the guide box (2), a shock absorber (4) is fixedly connected to the right end of the T-shaped frame (3), a middle block (5) is fixedly connected to the other end of the shock absorber (4), a return spring rod (6) is fixedly connected to the end of the middle block (5) near the guide box (2), a strip frame (7) is fixedly connected to the other end of the return spring rod (6), and a column (8) is fixedly connected to the upper end of the strip frame (7).

2. The ergonomic chair with a three-axis movable backrest according to claim 1, characterized in that, The outer surface of the column (8) is rotatably connected to a chair back (9), the left end of the chair back (9) is fixedly connected to a lumbar support (10), the outer surface of the lumbar support (10) abuts against an elastic mesh surface (11), the upper and lower ends of the elastic mesh surface (11) are fixedly connected to the left end of the chair back (9), and the upper end of the chair back (9) is snapped with a neck support (12).

3. The ergonomic chair with a three-axis movable backrest according to claim 2, characterized in that, An auxiliary threaded post (13) is rotatably connected to the right end of the chair back (9). An auxiliary knob (14) is fixedly connected to the upper end of the auxiliary threaded post (13). A U-shaped tooth condition (15) is threadedly connected to the outer surface of the auxiliary threaded post (13). The left end of the U-shaped tooth condition (15) is slidably connected to the right end of the chair back (9).

4. An ergonomic chair with a three-axis movable backrest according to claim 3, characterized in that, A lateral gear (16) is meshed with the outer surface of the U-shaped tooth condition (15). A bevel gear (17) is fixedly connected to the left end of the lateral gear (16). A bevel gear (18) is meshed with the outer surface of the bevel gear (17). A handrail (19) is fixedly connected to the end of the bevel gear (18) away from the guide box (2).

5. An ergonomic chair with a three-axis movable backrest according to claim 2, characterized in that, An auxiliary frame (20) is fixedly connected to the right end of the strip frame (7), and a spring telescopic rod (21) is rotatably connected to the upper end of the auxiliary frame (20). The other end of the spring telescopic rod (21) is rotatably connected to the right end of the chair back (9).

6. An ergonomic chair with a three-axis movable backrest according to claim 1, characterized in that, The inner surface of the guide box (2) is rotatably connected to an adjusting threaded rod (22). The outer surface of the adjusting threaded rod (22) is threadedly connected to the inner surface of the T-shaped frame (3). The bottom end of the adjusting threaded rod (22) is fixedly connected to a cross knob (23). The bottom end of the seat (1) is fixedly connected to a bracket (24). The inner surface of the bracket (24) is slidably connected to a leg (25). The bottom end of the leg (25) is rotatably connected to several casters (26).

Images