Swivel chair back seesaw mechanism

Abstract

The utility model relates to the technical field of office equipment, and discloses a swivel chair back warping plate mechanism which comprises a chair back, handrails are arranged on the two sides of the chair back, a U-shaped support is arranged at the bottom ends of the handrails, the two ends of the bottom end of the U-shaped support are in threaded connection with a chair seat through second bolts, and the chair back is located above the chair seat. A groove is formed in one end of each armrest, a limiting block is arranged at the bottom end of each saw-shaped clamping strip, one end of each limiting block is rotationally connected to the interior of the corresponding armrest through a rotating shaft, the bottom end of each clamping piece is arranged in the groove of the corresponding armrest, each clamping piece is in threaded connection to the side wall of the chair back through a first bolt, and an auxiliary assembly is arranged on the outer wall of the chair back. According to the utility model, the normal sitting posture is guaranteed, the fatigue is reduced, the working efficiency is improved, the problem that the back leaning angle of the seesaw plate of the chair back cannot be adjusted is solved, better supporting strength is provided, the wrong sitting posture is reduced, the problem that the waist supporting effect is poor is solved, and the practicability of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of office equipment, in particular to a seesaw mechanism for a swivel chair back. Background Art

[0002] With the development of modern society, people are spending more and more time in the office, and their requirements for the comfort and functionality of office chairs are constantly increasing. Ergonomics is the design of products that meet the physiological and psychological characteristics of the human body to improve people's quality of life and work efficiency. Ergonomics plays a vital role in the design of swivel chairs. Continuous advances in materials science and manufacturing technology have provided strong support for the development of swivel chair backrest mechanisms. New materials such as high-strength plastics and aluminum alloys offer advantages such as light weight, high strength, and corrosion resistance, making swivel chair structures more stable and reliable. Currently, the backrest mechanisms of swivel chairs on the market are composed of a base, a tray, and a lifting mechanism. Traditional office chairs often only provide basic sitting and standing support, failing to meet people's needs for different body posture adjustments during long work hours. The reclining angle of the chair backrest cannot be adjusted. Prolonged periods of not adjusting sitting posture can cause damage to the body and the mind. Utility Model Content

[0003] In order to remedy the above deficiencies, the present invention provides a swivel chair backrest rocker mechanism, which aims to improve the problem that the reclining angle of the chair backrest rocker cannot be adjusted.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a swivel chair backrest rocker mechanism comprises a chair back, armrests are provided on both sides of the chair back, and a U-shaped bracket is provided at the bottom end of the armrest, and the two ends of the bottom end of the U-shaped bracket are threadedly connected to the chair seat by a second bolt, the chair back is located above the chair seat, one end of the armrest is provided with a groove, a cavity is provided inside the armrest, a spring is provided in the cavity of the armrest, one end of the spring is provided with a saw-shaped clip, one end of the saw-shaped clip is fixedly connected to a clip, a limit block is provided at the bottom end of the saw-shaped clip, one end of the limit block is rotatably connected to the inside of the armrest through a rotating shaft, the bottom end of the clip is provided in the groove of the armrest, the clip is threadedly connected to the side wall of the chair back by a first bolt, and an auxiliary component is provided on the outer wall of the chair back.

[0005] Preferably, the auxiliary component includes a plurality of fixing blocks, the inner walls of the fixing blocks are fixedly connected to brackets, and the middle portion of the brackets is threadedly connected to a screw.

[0006] Preferably, one end of the screw is fixedly connected to a knob, and the other end of the screw is rotatably connected to a top block, and the side wall of the top block is arranged on the outer wall of the lumbar support.

[0007] Preferably, a base is provided on the upper surface of the waist support, and two side walls of the base are rotatably connected to a shift rod, and a handle is provided at one end of the shift rod.

[0008] Preferably, a contact block is provided at the other end of the shift rod, a placement groove is provided inside the base, and a hole is provided in the middle of the placement groove.

[0009] Preferably, a pneumatic rod is provided inside the placement groove, and a pneumatic piston is provided at the top end of the pneumatic rod.

[0010] Preferably, the outer wall of the pneumatic piston is arranged in the hole of the placement groove.

[0011] Preferably, a plurality of cross rods are provided at the bottom end of the pneumatic rod, and the bottom ends of the cross rods are fixedly connected to universal wheels.

[0012] The utility model has the following beneficial effects:

[0013] 1. In the present invention, the spring, saw-shaped card strip, limit block and card can achieve the effect of adjusting the reclining angle of the chair back rocker. Not only can the reclining angle be adjusted, but it can also be used for users to take a lunch break, ensuring a normal sitting posture, reducing fatigue, improving work efficiency, solving the problem of being unable to adjust the reclining angle of the chair back rocker, and providing better support strength.

[0014] 2. In the present invention, the auxiliary component can achieve the effect of adjusting the lumbar support, which can not only support the waist, but also correct the sitting posture, provide good support, reduce incorrect sitting posture, solve the problem of poor lumbar support effect, and increase the practicality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional schematic diagram of the rocker mechanism of the swivel chair backrest proposed in the present invention;

[0016] Figure 2 This is a three-dimensional schematic diagram of the saw-shaped clip of the rocker mechanism of the swivel chair backrest proposed by the present invention;

[0017] Figure 3 This is a three-dimensional schematic diagram of the rocker mechanism knob of the swivel chair backrest proposed in the present invention;

[0018] Figure 4 This is a three-dimensional schematic diagram of the rocker mechanism lever of the swivel chair backrest proposed in the present invention;

[0019] Figure 5 This is a three-dimensional schematic diagram of the pneumatic rod of the rocker mechanism of the swivel chair back proposed by the present invention.

[0020] Legend:

[0021] 1. Chair back; 2. Lumbar support; 3. Bracket; 4. Knob; 5. Fixing block; 6. Seat; 7. Pneumatic rod; 8. Cross rod; 9. Universal wheel; 10. Handle; 11. Lever; 12. Armrest; 13. U-shaped bracket; 14. Top block; 15. Screw; 16. Spring; 17. Saw-shaped clip; 18. Limit block; 19. Rotating shaft; 20. First bolt; 21. Second bolt; 22. Clip; 23. Base; 24. Contact block; 25. Placement slot; 26. Pneumatic piston. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figure 1-Figure 2 The utility model provides an embodiment of a swivel chair backrest rocker mechanism, comprising a chair back 1, armrests 12 are provided on both sides of the chair back 1, and a U-shaped bracket 13 is provided at the bottom end of the armrest 12, and the two ends of the bottom end of the U-shaped bracket 13 are threadedly connected to the chair seat 6 by a second bolt 21. The chair back 1 is located above the chair seat 6, and a groove is opened at one end of the armrest 12, and a cavity is provided inside the armrest 12, and a spring 16 is provided in the cavity of the armrest 12, and a saw-shaped clip 17 is provided at one end of the spring 16, and a clip 22 is fixedly connected to the saw-shaped clip 17 at one end. A limit block 18 is provided at the bottom end of the saw-shaped clip 17, and one end of the limit block 18 is rotatably connected to the inside of the armrest 12 through a rotating shaft 19, and the bottom end of the clip 22 is provided in the groove of the armrest 12, and the clip 22 is threadedly connected to the side wall of the chair back 1 by a first bolt 20, and an auxiliary component is provided on the outer wall of the chair back 1.

[0024] Specifically, when the user is using the chair, he or she can sit on the seat 6 to work, and the user's arms can be placed on the armrests 12 to provide support for the arms. When the user is tired from working, he or she can lean his or her back against the chair back 1 to take a rest. During lunch break, the user can lay the chair back 1 flat to 180 degrees and lie on it to take a lunch break. The user places both hands on the bottom limit block 18 of the armrest 12, and pinches upward with both hands to press the limit block 18. One end of the limit block 18 is a triangular buckle, which can be used to lock the saw-shaped card strip 17 inside the armrest 12. The saw-shaped card strip 17 is in the shape of a saw blade and can be locked with the limit block 18 When the user leans back against the chair back 1, the spring 16 is stretched, causing the chair back 1 to recline 180°. The limit block 18 can be adjusted to the groove that is stuck with the saw-shaped clip 17 according to the reclining angle to achieve multiple reclining angles. When the user needs to restore, the limit block 18 can be pinched to pull the chair back 1 back with the elastic force of the spring 16 to complete the restoration. The spring 16, the saw-shaped clip 17, the limit block 18 and the clip 22 can be used to adjust the reclining angle of the chair backrest. Not only can the reclining angle be adjusted, but it can also be used for users to take a nap, ensuring a normal sitting posture, reducing fatigue, and improving work efficiency. It solves the problem of being unable to adjust the reclining angle of the chair backrest and provides better support strength.

[0025] Reference Figure 3-Figure 5 The auxiliary components include several fixed blocks 5, the inner wall of the fixed block 5 is fixedly connected to the bracket 3, the middle part of the bracket 3 is threadedly connected to the screw 15, one end of the screw 15 is fixedly connected to the knob 4, and the other end of the screw 15 is rotatably connected to the top block 14, the side walls of the top block 14 are arranged on the outer wall of the lumbar support 2, and the upper surface of the lumbar support 2 is provided with a base 23, the two side walls of the base 23 are rotatably connected to the driving rod 11, one end of the driving rod 11 is provided with a handle 10, and the other end of the driving rod 11 is provided with a contact block 24, a placement groove 25 is provided inside the base 23, a hole is provided in the middle of the placement groove 25, a gas pressure rod 7 is provided inside the placement groove 25, a gas pressure piston 26 is provided at the top of the gas pressure rod 7, and the outer wall of the gas pressure piston 26 is provided in the hole of the placement groove 25, and a plurality of cross rods 8 are provided at the bottom end of the gas pressure rod 7, and the bottom end of the cross rod 8 is fixedly connected to the universal wheel 9.

[0026] Specifically, the user can support the waist through the auxiliary components behind the chair back 1, which include a lumbar support 2, a bracket 3, a knob 4, a fixing block 5, a top block 14, and a screw 15. The bracket 3 can be fixed by the fixing block 5, and the middle part of the bracket 3 is threadedly connected with the screw 15, one end of the screw 15 is fixedly connected with the knob 4, and the other end of the screw 15 is connected to the top block 14 through a bearing. When the user uses it, the screw 15 can be advanced by twisting the knob 4, and the screw 15 pushes the top block 14 through the bearing, so that the lumbar support 2 is advanced to fit closely against the chair back 1 to adjust the support for the waist, and the waist can be adjusted according to different people. The user can also adjust the height of the chair through the base 23 on the lower surface of the seat 6 by turning the handle 10 to drive the lever 11 to rotate, and the rotation of the lever 11 drives the contact block 24 to rotate. When the user stands up, the contact block 24 rotates and squeezes the pneumatic piston 26, allowing air to enter the pneumatic rod 7 through the pneumatic piston 26 to achieve the purpose of raising the pneumatic rod 7. When the user sits on the seat 6, the handle 10 is dialed again, causing the contact block 24 to squeeze the pneumatic piston 26. Combined with the user's own weight, the air in the pneumatic rod 7 can be quickly discharged to achieve the purpose of lowering, and the universal wheel 9 installed at the bottom end of the cross rod 8 can be moved. The auxiliary component can achieve the effect of adjusting the lumbar support, which not only supports the waist, but also corrects the sitting posture, provides good support, reduces incorrect sitting posture, solves the problem of poor lumbar support effect, and increases the practicality of the equipment.

[0027] Working principle: When the user is using the chair, he can sit on the seat 6 to work. When working, the user's arms can be placed on the armrests 12 to provide support for the arms. When the user is tired of working, he can lean his back on the chair back 1 to take a rest. During lunch break, the user can lay the chair back 1 flat to 180 degrees and lie on it to take a lunch break. The user places both hands on the bottom limit block 18 of the armrest 12, and pinches upward with both hands to press the limit block 18. One end of the limit block 18 is a triangular buckle, which can be used to lock the saw-shaped card strip 17 inside the armrest 12. The saw-shaped card strip 17 is in the shape of a saw blade and can interact with the limit block 18. When the user leans back against the chair back 1, the spring 16 is threadedly connected to the clamp 22, and the clamp 22 is connected to the saw-shaped clamping strip 17. When the user leans back against the chair back 1, the spring 16 is stretched, and the chair back 1 is tilted back 180°. The limit block 18 can be adjusted according to the tilting angle to be stuck in the groove of the saw-shaped clamping strip 17 to achieve multiple tilting angles. When the user needs to restore, the limit block 18 can be pinched to pull the chair back 1 back by the elastic force of the spring 16 to complete the restoration.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A swivel chair backrest rocker mechanism, comprising a chair backrest (1), characterized in that: The chair back (1) is provided with armrests (12) on both sides, the bottom end of the armrest (12) is provided with a U-shaped bracket (13), the two ends of the bottom end of the U-shaped bracket (13) are threadedly connected to the chair seat (6) through a second bolt (21), the chair back (1) is located above the chair seat (6), one end of the armrest (12) is provided with a groove, the interior of the armrest (12) is provided with a cavity, a spring (16) is provided in the cavity of the armrest (12), and one end of the spring (16) is provided with a A saw-shaped clamping strip (17), one end of which is fixedly connected to a clamping piece (22), a limit block (18) is provided at the bottom end of the saw-shaped clamping strip (17), one end of which is rotatably connected to the inside of the armrest (12) via a rotating shaft (19), the bottom end of the clamping piece (22) is provided in a groove of the armrest (12), the clamping piece (22) is threadedly connected to the side wall of the chair back (1) via a first bolt (20), and an auxiliary component is provided on the outer wall of the chair back (1).

2. The swivel chair backrest rocker mechanism according to claim 1, characterized in that: The auxiliary assembly comprises a plurality of fixed blocks (5), the inner walls of the fixed blocks (5) are fixedly connected to brackets (3), and the middle portion of the brackets (3) is threadedly connected to a screw rod (15).

3. The swivel chair backrest rocker mechanism according to claim 2, characterized in that: One end of the screw rod (15) is fixedly connected to a knob (4), and the other end of the screw rod (15) is rotatably connected to a top block (14), and a side wall of the top block (14) is arranged on the outer wall of the waist support (2).

4. The swivel chair backrest rocker mechanism according to claim 3, characterized in that: The upper surface of the waist support (2) is provided with a base (23), and the two side walls of the base (23) are rotatably connected to a shifting rod (11), and one end of the shifting rod (11) is provided with a handle (10).

5. The swivel chair backrest rocker mechanism according to claim 4, characterized in that: The other end of the shifting rod (11) is provided with a contact block (24), the interior of the base (23) is provided with a placement groove (25), and the middle of the placement groove (25) is provided with a hole.

6. The swivel chair backrest rocker mechanism according to claim 5, characterized in that: A pneumatic rod (7) is provided inside the placement groove (25), and a pneumatic piston (26) is provided at the top end of the pneumatic rod (7).

7. The swivel chair backrest rocker mechanism according to claim 6, characterized in that: The outer wall of the pneumatic piston (26) is arranged in the hole of the placement groove (25).

8. The swivel chair backrest rocker mechanism according to claim 6, characterized in that: The bottom end of the pneumatic rod (7) is provided with a plurality of cross rods (8), and the bottom end of the cross rod (8) is fixedly connected with a universal wheel (9).

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