Office seat headrest structure convenient to adjust

Abstract

The utility model relates to the technical field of office chairs, and discloses an office chair headrest structure convenient to adjust, which comprises a headrest main body, a fixing frame and a hinge connecting frame, a lifting frame is movably arranged in the fixing frame, and a height adjusting assembly is arranged between the lifting frame and the fixing frame. A connecting base is fixedly connected to the middle of one side of the headrest body, a dismounting assembly is arranged between the two ends of the hinge connecting frame and the connecting base and the lifting frame, the height adjusting assembly comprises an adjusting lead screw, the adjusting lead screw is rotationally connected to the inner wall of the lower end of the fixing frame, and the adjusting lead screw is arranged in the lifting frame in a threaded and sleeved mode. According to the headrest structure, the strength needed by a user during adjustment is remarkably reduced through the arrangement of the height adjusting assembly, operation is easier and more convenient, adjustment is more accurate, the hinge connecting frame can be independently detached through the arrangement of the detaching assembly, and the situation that the whole headrest structure is replaced due to hinge abrasion is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of office chairs, in particular to a conveniently adjustable headrest structure for office chairs. Background Art

[0002] With the changes in the modern office environment, office chairs have become one of the indispensable furniture in the daily work of many people, especially when sitting for a long time. The comfort of the chair has an important impact on the health and work efficiency of employees. As an important component of adjusting sitting comfort, the headrest usually needs to be adjusted in height and angle according to the needs of the user. The headrest angle adjustment device in the prior art usually connects the headrest and the fixing frame through a hinge, and the height adjustment device usually adjusts the headrest height through a manual pull rod.

[0003] The existing relevant adjustment mechanism adopts mechanical connection and direct force application. The adjustment process often requires a lot of force. When adjusting the height of the headrest, the user needs to overcome large friction or resistance, resulting in the operation being not easy and convenient. In addition, the hinge connection parts in the relevant adjustment mechanism are prone to wear over time, causing the headrest structure to become loose, and even the entire headrest needs to be replaced, increasing the cost of maintenance and replacement. Therefore, technical personnel in this field provide an office chair headrest structure that is easy to adjust to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the present utility model is to solve the shortcomings of the prior art and to propose an easily adjustable office chair headrest structure. By providing a height adjustment component, compared with the traditional manual adjustment method, it not only significantly reduces the force required for user adjustment, making the operation easier and more convenient, but also due to the precise transmission structure, the adjustment is more accurate. By providing a disassembly component, the hinge connecting frame can be removed separately, avoiding the replacement of the entire headrest structure due to hinge wear, thereby effectively reducing maintenance costs and increasing the service life of the headrest.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a conveniently adjustable office chair headrest structure, comprising a headrest body, a fixing frame, and a hinged connecting frame; a lifting frame is movably provided inside the fixing frame; a height adjustment assembly is provided between the lifting frame and the fixing frame; a connecting seat is fixedly connected to the middle portion of one side of the headrest body; and disassembly assemblies are provided between the two ends of the hinged connecting frame and the connecting seat and the lifting frame;

[0006] The height adjustment assembly includes an adjusting screw, which is rotatably connected to the inner wall of the lower end of the fixing frame. The adjusting screw is threadedly sleeved inside the lifting frame. A transmission groove is opened inside the fixing frame. A transmission shaft is rotatably connected between the upper and lower inner walls of the transmission groove. A first bevel gear is fixedly sleeved on the outer wall of the transmission shaft. A knob is rotatably connected to one side of the fixing frame. One end of the knob passes through the fixing frame to the transmission groove and is fixedly sleeved on the second bevel gear.

[0007] Through the above technical solution, by providing a height adjustment component, the adjustment screw can be rotated by turning the knob, and through the first bevel gear, the second bevel gear and the transmission shaft, the lifting and lowering movement of the lifting frame can be accurately controlled to achieve the height adjustment of the headrest body. Compared with the traditional manual adjustment method, it not only significantly reduces the force required for the user to adjust, making the operation easier and more convenient, but also due to the precise transmission structure, the adjustment is more precise.

[0008] Furthermore, the disassembly assembly includes a first connecting block and a second connecting block, the first connecting block and the second connecting block are both fixedly connected to the hinge connecting frame, the upper end of the lifting frame is provided with a first connecting groove, and one side of the connecting seat is provided with a second connecting groove, the first connecting block and the second connecting block are respectively clamped and arranged in the first connecting groove and the second connecting groove, the front and rear ends of the first connecting block and the second connecting block are both provided with a rebound groove, and a plurality of fixed clamping blocks are movably provided inside the rebound grooves, the front and rear end inner walls of the first connecting groove and the second connecting groove are both provided with a fixed clamping groove, and the plurality of fixed clamping blocks are all clamped and arranged in the corresponding fixed clamping grooves, and a plurality of return springs are fixedly connected between the plurality of fixed clamping blocks and the inner walls of the opposite ends of the corresponding rebound grooves;

[0009] Through the above technical solution, by providing a disassembly component, when the hinge part is worn and affects its use, the corresponding fixed block can be pressed to disengage it from the fixed slot, thereby releasing the fixing restrictions between the two ends of the hinge connecting frame and the connecting seat and the lifting frame, so that the hinge connecting frame can be removed separately, avoiding the replacement of the entire headrest structure due to hinge wear, thereby effectively reducing maintenance costs and increasing the service life of the headrest.

[0010] Furthermore, a positioning frame is fixedly connected to one side of the fixing frame near the knob, a threaded rod is rotatably connected to the inner wall of the lower end of the positioning frame, a threaded sleeve is threadedly sleeved on the outer wall of the threaded rod, and the threaded sleeve is movably arranged in the positioning frame, a stop block is fixedly connected to the upper end of the threaded sleeve, a rubber pad is fixedly connected to the upper end of the stop block, a positioning groove is opened in the middle of the outer wall of the knob, and the stop block and the rubber pad are clamped and arranged in the positioning groove;

[0011] Through the above technical solution, if the usage environment is relatively complex, after adjusting the height, in order to avoid external factors accidentally touching the knob and causing unexpected changes in the height of the headrest body, the threaded rod can be controlled to rotate, and the stop block and rubber pad can be inserted into the positioning groove through the provided threaded sleeve, and pressed against the inner wall of the positioning groove, thereby effectively improving the stability of the knob when it is stationary and improving the use effect.

[0012] Furthermore, the first bevel gear and the second bevel gear are meshed, and the upper end of the transmission shaft passes through the fixing frame and is fixedly connected to the adjusting screw;

[0013] Through the above technical solution, by meshing the first bevel gear and the second bevel gear, and fixing the transmission shaft to the adjusting screw, when the second bevel gear rotates, the first bevel gear can rotate with the transmission shaft, thereby rotating the adjusting screw.

[0014] Furthermore, first limiting grooves are provided on both inner walls of the fixing frame, first limiting blocks are slidably provided inside the two first limiting grooves, and the two first limiting blocks are fixedly connected to the lifting frame;

[0015] With the above technical solution, by providing the first limiting groove and the first limiting block, the lifting process of the lifting frame can be made more stable.

[0016] Furthermore, the inner walls on both sides of the positioning frame are provided with second limiting grooves, and second limiting blocks are slidably provided inside the two second limiting grooves, and the two second limiting blocks are fixedly connected to the threaded sleeve;

[0017] Through the above technical solution, by providing the second limiting groove and the second limiting block, the movement process of the threaded sleeve can be made more stable.

[0018] Furthermore, the lower end of the positioning frame is rotatably connected to a rotating head, and the lower end of the threaded rod passes through the positioning frame and is fixedly connected to the rotating head;

[0019] Through the above technical solution, by providing a rotating head, it is convenient for the operator to rotate the threaded rod by rotating the rotating head.

[0020] Furthermore, a mounting plate is fixedly connected to one side of the fixing frame close to the headrest body;

[0021] Through the above technical solution, by providing a mounting plate, the device can be fixedly mounted on the seat.

[0022] The utility model has the following beneficial effects:

[0023] 1. The conveniently adjustable office chair headrest structure proposed by the present invention is provided with a height adjustment component, which can be turned by rotating the knob and the adjusting screw can be rotated via the first bevel gear, the second bevel gear and the transmission shaft, thereby accurately controlling the lifting and lowering movement of the lifting frame to achieve height adjustment of the headrest body. Compared with the traditional manual adjustment method, it not only significantly reduces the force required for user adjustment, making the operation easier and more convenient, but also due to the precise transmission structure, the adjustment is more precise. If the use environment is relatively complex, the control block and the rubber pad can be clamped into the positioning groove and pressed against the inner wall of the positioning groove, thereby effectively improving the stability of the knob when it is stationary, further improving the use effect.

[0024] 2. The conveniently adjustable office chair headrest structure proposed by the present invention is provided with a disassembly component. When the hinge part is worn and affects its use, the corresponding fixed block can be pressed to disengage it from the fixed slot, thereby releasing the fixing restrictions between the two ends of the hinge connecting frame and the connecting seat and the lifting frame. The hinge connecting frame can then be removed separately, avoiding the replacement of the entire headrest structure due to hinge wear, thereby effectively reducing maintenance costs and increasing the service life of the headrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an axonometric diagram of the conveniently adjustable office chair headrest structure proposed in the present invention;

[0026] Figure 2 This is a front cross-sectional view of the conveniently adjustable office chair headrest structure proposed by the present invention;

[0027] Figure 3 This is a partial side sectional diagram of the conveniently adjustable office chair headrest structure proposed by the present invention;

[0028] Figure 4 This is a partial front cross-sectional diagram of the conveniently adjustable office chair headrest structure proposed by the present invention;

[0029] Figure 5 This is a top view schematic diagram of the conveniently adjustable office chair headrest structure proposed by the present invention.

[0030] Legend:

[0031] 1. Headrest body; 2. Fixing frame; 3. Hinge connecting frame; 4. Lifting frame; 5. Height adjustment assembly; 6. Connecting seat; 7. Disassembly assembly; 8. Adjusting screw; 9. First limiting groove; 10. First limiting block; 11. Transmission groove; 12. Transmission shaft; 13. First bevel gear; 14. Knob; 15. Second bevel gear; 16. Positioning frame; 17. Threaded rod; 18. Threaded sleeve; 19. Block; 20. Rubber pad; 21. Positioning groove; 22. Turning head; 23. Second limiting groove; 24. Second limiting block; 25. First connecting block; 26. Second connecting block; 27. First connecting groove; 28. Second connecting groove; 29. ​​Rebound groove; 30. Fixed block; 31. Fixed slot; 32. Return spring; 33. Mounting plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the specific embodiments of the present invention to clearly and completely describe the technical solutions in the specific embodiments of the present invention. Obviously, the specific embodiments described are only part of the specific embodiments of the present invention, not all of the specific embodiments. Based on the specific embodiments of the present invention, all other specific embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Reference Figure 1 、 Figure 2 and Figure 4 The utility model provides a specific embodiment: a conveniently adjustable office chair headrest structure, including a headrest body 1, a fixing frame 2 and a hinge connecting frame 3, a lifting frame 4 is movably provided inside the fixing frame 2, a height adjustment component 5 is provided between the lifting frame 4 and the fixing frame 2, a connecting seat 6 is fixedly connected to the middle part of one side of the headrest body 1, and a disassembly component 7 is provided between the two ends of the hinge connecting frame 3 and the connecting seat 6 and the lifting frame 4;

[0034] The height adjustment assembly 5 includes an adjusting screw 8, which is rotatably connected to the inner wall of the lower end of the fixed frame 2. The adjusting screw 8 is threadedly sleeved on the inside of the lifting frame 4. A transmission groove 11 is provided inside the fixed frame 2. A transmission shaft 12 is rotatably connected between the upper and lower inner walls of the transmission groove 11. The outer wall of the transmission shaft 12 is fixedly sleeved with a first bevel gear 13. One side of the fixed frame 2 is rotatably connected to a knob 14. One end of the knob 14 passes through the fixed frame 2 to the transmission groove 11 and is fixedly sleeved with a second bevel gear 15. The first bevel gear 13 and the second bevel gear 15 are meshed. The upper end of the transmission shaft 12 passes through the fixed frame 2 and is fixedly connected to the adjusting screw 8. By meshing the first bevel gear 13 and the second bevel gear 15, and fixing the transmission shaft 12 to the adjusting screw 8 The first bevel gear 13 is fixedly connected, and when the second bevel gear 15 rotates, the first bevel gear 13 can rotate with the transmission shaft 12, so that the adjusting screw rod 8 can be rotated. By providing a height adjustment component 5, the knob 14 can be rotated, and the adjusting screw rod 8 can be rotated via the first bevel gear 13, the second bevel gear 15 and the transmission shaft 12, so as to accurately control the lifting and lowering movement of the lifting frame 4 to achieve the height adjustment of the headrest body 1. Compared with the traditional manual adjustment method, it not only significantly reduces the force required for the user to adjust, making the operation easier and more convenient, but also due to the precise transmission structure, the adjustment is more precise. The inner walls on both sides of the fixing frame 2 are provided with first limiting grooves 9, and the interiors of the two first limiting grooves 9 are slidably provided with first limiting grooves. The first limit block 10 is fixedly connected to the lifting frame 4. The first limit groove 9 and the first limit block 10 are provided, so that the lifting process of the lifting frame 4 can be made more stable. A positioning frame 16 is fixedly connected to one side of the fixing frame 2 near the knob 14. The inner wall of the lower end of the positioning frame 16 is rotatably connected to a threaded rod 17. The outer wall of the threaded rod 17 is threadedly sleeved with a threaded sleeve 18. The threaded sleeve 18 is movably arranged in the positioning frame 16. The upper end of the threaded sleeve 18 is fixedly connected to a stop block 19. The upper end of the stop block 19 is fixedly connected to a rubber pad 20. A positioning groove 21 is provided in the middle of the outer wall of the knob 14. The stop block 19 and the rubber pad 20 are engaged with each other in the positioning groove 21. If the use environment is relatively complicated, after adjusting the height, in order to To prevent the height of the headrest body 1 from being accidentally changed due to external factors touching the knob 14, the threaded rod 17 can be controlled to rotate, and the stop block 19 and the rubber pad 20 can be inserted into the positioning groove 21 through the provided threaded sleeve 18, and pressed against the inner wall of the positioning groove 21, thereby effectively improving the stability of the knob 14 when it is stationary and improving the use effect. Second limiting grooves 23 are provided on the inner walls of the two sides of the positioning frame 16, and second limiting blocks 24 are slidably provided inside the two second limiting grooves 23. The two second limiting blocks 24 are fixedly connected to the threaded sleeve 18. By providing the second limiting grooves 23 and the second limiting blocks 24, the movement process of the threaded sleeve 18 can be made more stable. The lower end of the positioning frame 16 is rotatably connected to the rotating head 22.The lower end of the threaded rod 17 passes through the positioning frame 16 and is fixedly connected to the rotating head 22. The rotating head 22 allows the operator to rotate the threaded rod 17 by turning the rotating head 22. The side of the fixing frame 2 close to the headrest body 1 is fixedly connected to the mounting plate 33, which facilitates the fixing of the device to the seat.

[0035] Reference Figure 2 、 Figure 3 and Figure 5 The disassembly component 7 includes a first connecting block 25 and a second connecting block 26. The first connecting block 25 and the second connecting block 26 are both fixedly connected to the hinge connecting frame 3. A first connecting groove 27 is provided on the upper end of the lifting frame 4, and a second connecting groove 28 is provided on one side of the connecting seat 6. The first connecting block 25 and the second connecting block 26 are respectively engaged in the first connecting groove 27 and the second connecting groove 28. The front and rear ends of the first connecting block 25 and the second connecting block 26 are both provided with rebound grooves 29. Fixed card blocks 30 are movably provided inside the multiple rebound grooves 29. Fixed card grooves 3 are provided on the inner walls of the front and rear ends of the first connecting grooves 27 and the second connecting grooves 28. 1. Multiple fixing blocks 30 are all engaged in the corresponding fixing slots 31. Multiple return springs 32 are fixedly connected between the multiple fixing blocks 30 and the inner wall of the opposite end of the corresponding rebound slot 29. By providing a disassembly component 7, when the hinge part is worn and affects the use, the corresponding fixing block 30 can be pressed to disengage it from the fixing slot 31, thereby releasing the fixing restrictions between the two ends of the hinge connecting frame 3 and the connecting seat 6 and the lifting frame 4, so that the hinge connecting frame 3 can be removed separately, avoiding the replacement of the entire headrest structure due to hinge wear, thereby effectively reducing maintenance costs and increasing the service life of the headrest.

[0036] Working principle: When the height of the headrest body 1 needs to be adjusted, the second bevel gear 15 can be rotated by turning the knob 14, and then the first bevel gear 13 can be rotated with the transmission shaft 12, so that the adjusting screw rod 8 can be rotated, and then the lifting and lowering movement of the lifting frame 4 can be accurately controlled to achieve the height adjustment of the headrest body 1, which significantly reduces the force required by the user for adjustment and makes the operation easier and more convenient. If the use environment is more complicated, after adjusting the height, in order to avoid external factors accidentally touching the knob 14 and causing the height of the headrest body 1 to change unexpectedly, the threaded rod 17 can be rotated by turning the turntable 22, and the threaded sleeve 18 is provided to make the block 19 and the rubber pad 20 fit into the positioning groove 21 and press it tightly against the inner wall of the positioning groove 21. This can effectively improve the stability of the knob 14 when it is stationary and improve the use effect. When the hinge part is worn and affects the use, the corresponding fixing block 30 can be pressed to disengage it from the fixing slot 31, thereby releasing the fixing restrictions between the two ends of the hinge connecting frame 3 and the connecting seat 6 and the lifting frame 4, so that the hinge connecting frame 3 can be removed separately, avoiding the replacement of the entire headrest structure due to hinge wear, thereby effectively reducing maintenance costs and increasing the service life of the headrest. When reinstalling, it is only necessary to correspondingly insert the first connecting block 25 and the second connecting block 26 into the first connecting slot 27 and the second connecting slot 28, and then the corresponding fixing block 30 can be reset and popped out and inserted into the fixing slot 31 through the reset spring 32 to achieve connection and fixation.

[0037] Finally, it should be noted that the above is only a preferred specific implementation method 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 specific implementation methods, those skilled in the art can still modify the technical solutions described in the aforementioned specific implementation methods 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. An office chair headrest structure with convenient adjustment, comprising a headrest body (1), a fixing frame (2) and a hinge connecting frame (3), characterized in that: A lifting frame (4) is movably provided inside the fixing frame (2), a height adjustment assembly (5) is provided between the lifting frame (4) and the fixing frame (2), a connecting seat (6) is fixedly connected to the middle of one side of the headrest body (1), and a disassembly assembly (7) is provided between the two ends of the hinge connecting frame (3) and the connecting seat (6) and the lifting frame (4); The height adjustment assembly (5) comprises an adjusting screw (8), the adjusting screw (8) being rotatably connected to the inner wall of the lower end of the fixing frame (2), the adjusting screw (8) being threadedly sleeved inside the lifting frame (4), a transmission groove (11) being provided inside the fixing frame (2), a transmission shaft (12) being rotatably connected between the upper and lower inner walls of the transmission groove (11), a first bevel gear (13) being fixedly sleeved on the outer wall of the transmission shaft (12), a knob (14) being rotatably connected to one side of the fixing frame (2), one end of the knob (14) passing through the fixing frame (2) to the transmission groove (11) and being fixedly sleeved on the second bevel gear (15).

2. The conveniently adjustable office chair headrest structure according to claim 1, characterized in that: The disassembly assembly (7) includes a first connecting block (25) and a second connecting block (26), the first connecting block (25) and the second connecting block (26) are both fixedly connected to the hinge connecting frame (3), the upper end of the lifting frame (4) is provided with a first connecting groove (27), and one side of the connecting seat (6) is provided with a second connecting groove (28), the first connecting block (25) and the second connecting block (26) are respectively engaged in the first connecting groove (27) and the second connecting groove (28), and the first connecting block (2 5) The front and rear ends of the second connecting block (26) are both provided with rebound grooves (29), and a plurality of fixed clamping blocks (30) are movably provided inside the rebound grooves (29). The front and rear end inner walls of the first connecting groove (27) and the second connecting groove (28) are both provided with fixed clamping grooves (31), and a plurality of fixed clamping blocks (30) are all engaged in the corresponding fixed clamping grooves (31). A plurality of return springs (32) are fixedly connected between the plurality of fixed clamping blocks (30) and the inner wall of the opposite end of the corresponding rebound groove (29).

3. The conveniently adjustable office chair headrest structure according to claim 1, characterized in that: A positioning frame (16) is fixedly connected to one side of the fixing frame (2) near the knob (14); a threaded rod (17) is rotatably connected to the inner wall of the lower end of the positioning frame (16); a threaded sleeve (18) is threadedly sleeved on the outer wall of the threaded rod (17); the threaded sleeve (18) is movably arranged in the positioning frame (16); a stop block (19) is fixedly connected to the upper end of the threaded sleeve (18); a rubber pad (20) is fixedly connected to the upper end of the stop block (19); a positioning groove (21) is provided in the middle of the outer wall of the knob (14); the stop block (19) and the rubber pad (20) are engaged and arranged in the positioning groove (21).

4. The conveniently adjustable office chair headrest structure according to claim 1, characterized in that: The first bevel gear (13) and the second bevel gear (15) are meshed, and the upper end of the transmission shaft (12) passes through the fixed frame (2) and is fixedly connected to the adjusting screw rod (8).

5. The conveniently adjustable office chair headrest structure according to claim 1, characterized in that: The inner walls on both sides of the fixing frame (2) are provided with first limiting grooves (9), and first limiting blocks (10) are slidably provided inside the two first limiting grooves (9), and the two first limiting blocks (10) are fixedly connected to the lifting frame (4).

6. The conveniently adjustable office chair headrest structure according to claim 3, characterized in that: Second limiting grooves (23) are provided on both inner walls of the positioning frame (16), and second limiting blocks (24) are slidably provided inside the two second limiting grooves (23), and the two second limiting blocks (24) are fixedly connected to the threaded sleeve (18).

7. The conveniently adjustable office chair headrest structure according to claim 3, characterized in that: The lower end of the positioning frame (16) is rotatably connected to a rotating head (22), and the lower end of the threaded rod (17) passes through the positioning frame (16) and is fixedly connected to the rotating head (22).

8. The conveniently adjustable office chair headrest structure according to claim 1, characterized in that: A mounting plate (33) is fixedly connected to one side of the fixing frame (2) close to the headrest body (1).

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