Chair backrest adjusting structure
By using the double gear and double snap-in teeth in the chair back adjustment structure, and combining the design of limit snap and return spring, the fast and convenient adjustment of the chair back angle is achieved, and the cumbersome operation in the existing technology is solved question.
Patent Information
- Application Number
- CN202421324118.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The existing chair backrest adjustment structure is adjusted by rotating screws, which is cumbersome and inconvenient to adjust.
The backrest is fixed by meshing the double gears with the double snap-in teeth, and the backrest angle is freely adjusted and fixed by the coordination of the limit snap and return spring.
By operating both sides of both hands simultaneously, rapid adjustment of the backrest angle is achieved, solving the problem of inconvenient adjustment in the prior art.
Smart Images
Figure CN222443623U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of chairs, in particular to a chair backrest adjustment structure capable of adjusting the chair backrest angle. Background Art
[0002] The backrest adjustment structure of the chair is a key component connecting the chair backrest and the seat part, which is composed of two parts, one on the left and one on the right, so as to achieve the purpose of adjusting the backrest forward and backward. The existing backrest adjustment method is mostly to fix the backrest by rotating screws, which is too cumbersome to operate. When adjusting, it is necessary to turn the screws on both sides to rotate and fix. When adjusting, both sides need to be operated, which requires the user to use both hands or even stand up to operate. The operation is cumbersome and the adjustment is inconvenient. Utility Model Content
[0003] The utility model aims to provide a chair backrest adjustment structure in view of the deficiencies in the prior art, thereby solving the problem that the prior backrest angle adjustment structure adopts a method of rotating screws on both sides for adjustment, which is cumbersome to operate and inconvenient to adjust.
[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:
[0005] A chair back adjustment structure, which comprises an upper connecting member, a lower connecting member cooperating with the upper connecting member, a limiting assembly is provided on the upper connecting member, and a gear member cooperating with the limiting assembly is provided on the lower connecting member, and the adjustment of the chair back angle is achieved through the cooperation of the limiting assembly and the gear member; wherein, the limiting assembly comprises a limiting buckle cooperating with the gear member, an arc-shaped groove is provided at the bottom of the limiting buckle, and teeth that engage with the gear of the gear member are provided on both sides of the arc-shaped groove, and the upper end of the limiting buckle is movably connected to the lower end of the upper connecting member through a return spring, a spring receiving groove is provided at the upper end of the limiting buckle, and an upper connecting member through hole is provided in the middle of the spring receiving groove, and the upper connecting member through hole is located between the teeth on both sides of the arc-shaped groove; the gear member comprises a left gear and a right gear, and the left gear and the right gear are arranged at intervals to form an upper connecting member fixed position, and the lower end of the upper connecting member is fixed in the upper connecting member fixed position.
[0006] The upper connecting member comprises an upper connecting tube arranged at the upper end, and a square column arranged at the lower end and matched with the limit buckle, and the reset spring is sleeved on the square column.
[0007] A step is provided between the upper connecting tube and the square column, and the upper end of the return spring is pressed tightly against the lower end surface of the step.
[0008] A first through hole is provided between the left gear and the right gear, a second through hole is provided at the lower end of the upper connecting member corresponding to the first through hole, and fixing bolts are provided in the first through hole and the second through hole and pass through the first through hole and the second through hole.
[0009] The lower connecting member is a sleeve, which is arranged at the front end, rear end or lower end of the gear member.
[0010] The upper connecting piece and the lower connecting piece are both provided with screw holes for fixing with the chair backrest or the chair body.
[0011] The beneficial effect of the utility model is that the backrest is fixed by adopting the method of meshing double gears with double latch teeth, and when the limit buckle is pulled upward, the gear and the latch teeth are separated, so that the backrest angle can be freely adjusted; when the limit buckle is released, the limit buckle is reset by the action of the reset spring, so that the gear and the latch teeth are re-matched to achieve angle fixation, so that the backrest angle can be quickly adjusted by operating both sides of the hands at the same time, which solves the problem that the existing backrest adjustment structure needs to be adjusted by turning the screw and the adjustment is inconvenient.
[0012] The backrest adjustment structure of the utility model is mainly used for adjusting the backrest of a folding fishing chair, and can also be used for adjusting the backrest of other chairs. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 To hide the internal structure of the limit buckle;
[0015] Figure 3 for Figure 1 Exploded image;
[0016] Figure 4 This is a diagram of the limit buckle structure;
[0017] Figure 5 To use the state diagram.
[0018] In the figure: 1. Limit buckle 2. Arc groove 3. Gear 4. Return spring
[0019] 5. Spring groove 6. Upper connecting piece through hole 7. Left gear 8. Right gear
[0020] 9. Upper connection fixing position 10. Upper connection pipe 11. Square column 12. Step
[0021] 13. First through hole 14. Second through hole 15. Fixing bolt 16. Casing
[0022] 17. Screw hole DETAILED DESCRIPTION
[0023] Example: See Figures 1 to 5, the present embodiment provides a chair backrest adjustment structure, which includes an upper connecting member, a lower connecting member matched with the upper connecting member, a limiting assembly is provided on the upper connecting member, and a gear member matched with the limiting assembly is provided on the lower connecting member, and the adjustment of the chair backrest angle is achieved through the cooperation of the limiting assembly and the gear member; wherein, the limiting assembly includes a limiting buckle 1 matched with the gear member, an arc-shaped groove 2 is provided at the bottom of the limiting buckle 1, and teeth 3 engaged with the gear of the gear member are provided on both sides of the arc-shaped groove 2, the upper end of the limiting buckle 1 is movably connected to the lower end of the upper connecting member through a reset spring 4, a spring receiving groove 5 is provided at the upper end of the limiting buckle 1, and an upper connecting member through hole 6 is provided in the middle of the spring receiving groove 5, and the upper connecting member through hole 6 is located between the teeth 3 on both sides of the arc-shaped groove 2; the gear member includes a left gear 7 and a right gear 8, and the left gear 7 and the right gear 8 are arranged at intervals to form an upper connecting member fixing position 9, and the lower end of the upper connecting member is fixed in the upper connecting member fixing position 9.
[0024] The upper connecting member includes an upper connecting tube 10 arranged at the upper end, and a square column 11 arranged at the lower end and matched with the limit buckle 1 , and the reset spring 4 is sleeved on the square column 11 .
[0025] A step 12 is provided between the upper connecting tube 10 and the square column 11 , and the upper end of the return spring 4 is pressed against the lower end surface of the step 12 .
[0026] A first through hole 13 is provided between the left gear 7 and the right gear 8, a second through hole 14 is provided at the lower end of the upper connecting member corresponding to the first through hole 13, and fixing bolts 15 are provided in the first through hole 13 and the second through hole 14 and cross the first through hole 13 and the second through hole 14.
[0027] The upper connecting member and the lower connecting member are movably connected via the fixing bolts, and the upper connecting member can rotate relative to the lower connecting member via the fixing bolts.
[0028] The lower connecting member is a sleeve 16, which is arranged at the front end, rear end or lower end of the gear member.
[0029] The upper connecting member and the lower connecting member are both provided with screw holes 17 for fixing to the chair backrest or the chair body.
[0030] When the backrest needs to be adjusted, the limit buckle only needs to be pulled upward to disengage the locking teeth from the gear part, so that the upper connecting part rotates relative to the lower connecting part along the fixing bolt, thereby adjusting the angle of the backrest. When the backrest is adjusted to a suitable position, the limit buckle is released, and the limit buckle is reset under the action of the reset spring, so that the locking teeth and the gear part are re-matched, thus realizing the limit position of the backrest.
[0031] However, the above description is only a preferred feasible embodiment of the present utility model and is not intended to limit the patent scope of the present utility model. Therefore, all other embodiments recorded in the present utility model and equivalent changes made thereto are included in the protection scope of the present utility model.
Claims
1. A chair backrest adjustment structure, characterized in that: It includes an upper connecting member, a lower connecting member cooperating with the upper connecting member, a limiting assembly is provided on the upper connecting member, and a gear member cooperating with the limiting assembly is provided on the lower connecting member, and the adjustment of the chair backrest angle is achieved through the cooperation of the limiting assembly and the gear member; wherein, the limiting assembly includes a limiting buckle cooperating with the gear member, an arc-shaped groove is provided at the bottom of the limiting buckle, and teeth that engage with the gear of the gear member are provided on both sides of the arc-shaped groove, the upper end of the limiting buckle is movably connected to the lower end of the upper connecting member through a reset spring, a spring receiving groove is provided at the upper end of the limiting buckle, and an upper connecting member through hole is provided in the middle of the spring receiving groove, and the upper connecting member through hole is located between the teeth on both sides of the arc-shaped groove; the gear member includes a left gear and a right gear, and the left gear and the right gear are arranged at intervals to form an upper connecting member fixed position, and the lower end of the upper connecting member is fixed in the upper connecting member fixed position.
2. The chair backrest adjustment structure according to claim 1, characterized in that: The upper connecting member comprises an upper connecting tube arranged at the upper end, and a square column arranged at the lower end and matched with the limit buckle, and the reset spring is sleeved on the square column.
3. The chair backrest adjustment structure according to claim 2, characterized in that: A step is provided between the upper connecting tube and the square column, and the upper end of the return spring is pressed tightly against the lower end surface of the step.
4. The chair backrest adjustment structure according to claim 1, characterized in that: A first through hole is provided between the left gear and the right gear, a second through hole is provided at the lower end of the upper connecting member corresponding to the first through hole, and fixing bolts are provided in the first through hole and the second through hole and pass through the first through hole and the second through hole.
5. The chair backrest adjustment structure according to claim 1, characterized in that: The lower connecting member is a sleeve, which is arranged at the front end, rear end or lower end of the gear member.
6. The chair backrest adjustment structure according to claim 1, characterized in that: The upper connecting piece and the lower connecting piece are both provided with screw holes for fixing with the chair backrest or the chair body.