Front-and-back adjusting device for chair headrest

Abstract

The utility model discloses a front-back adjusting device for a chair headrest. The front-back adjusting device comprises a headrest, a sliding device and a mounting seat, the sliding device is connected with the headrest, and the mounting seat is connected with the sliding device; a limiting structure is arranged on the mounting seat, and the limiting structure is in bolted connection with the mounting seat; a first sliding groove is formed in the bottom of the sliding device; the limiting structure is in sliding connection with the first sliding groove; one end of the first sliding groove is matched with the limiting structure. The limiting structure is in sliding connection with the first sliding groove, one end of the first sliding groove is matched with the limiting structure, and when the limiting structure slides to one end of the first sliding groove, the limiting structure is assembled into one end of the first sliding groove in a sliding mode, so that the front-back position of the headrest is fixed, and the front-back adjusting device for the chair headrest is compact in structure; and the situation that the headrest shakes back and forth is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture articles, in particular to a front and back adjustment device for a chair headrest. Background Art

[0002] At present, the structure of the front and back adjustment device for a chair headrest on the market generally includes a fixed shell and an adjustment column. The adjustment column is located inside the fixed shell. One end of the adjustment column is connected to the headrest. A plurality of card slots are provided on the adjustment column, and a clamping block matching the card slots is provided on the fixed shell. By sliding the other end of the adjustment column connected to the fixed shell, the clamping block is inserted into any one of the card slots to realize the front and back adjustment of the headrest.

[0003] However, the structural connection method of this kind of front and back adjustment of the chair headrest is too simple. When the front and back adjustment device of the chair headrest is used for a long time, the clamping block and the card slot are prone to a certain degree of wear, increasing the gap between the clamping block and the card slot. As a result, after the front and back adjustment of the headrest, the headrest cannot be well limited. When the user leans on the headrest, the headrest shakes back and forth, resulting in a poor product use experience for the user.

[0004] Therefore, how to make the structure of the front and back adjustment device of the chair headrest compact and reduce the situation of the headrest shaking back and forth is a problem that needs to be solved by technical personnel at present. Summary of the Utility Model

[0005] To overcome the problems existing in the related art, the utility model provides a front and back adjustment device for a chair headrest. The limiting structure is slidably connected with the first sliding groove. One end of the first sliding groove is adapted to the limiting structure. When the limiting structure slides to one end of the first sliding groove, the limiting structure is slidably assembled into one end of the first sliding groove, so that the front and back positions of the headrest are fixed. The structure of the front and back adjustment device of the chair headrest is compact, reducing the situation of the headrest shaking back and forth.

[0006] The utility model provides a front and back adjustment device for a chair headrest, including:

[0007] A headrest, a sliding device and a mounting seat;

[0008] The sliding device is connected to the headrest, and the mounting seat is connected to the sliding device;

[0009] A limiting structure is provided on the mounting seat, and the limiting structure is bolted to the mounting seat;

[0010] A first sliding groove is provided at the bottom of the sliding device;

[0011] The limiting structure is slidably connected with the first sliding groove;

[0012] One end of the first sliding groove is adapted to the limiting structure.

[0013] Further, a second sliding groove is provided on the mounting base;

[0014] The sliding device is located in the second sliding groove;

[0015] The sliding device is slidably connected to the mounting base based on the second sliding groove.

[0016] Further, the width of one end of the first sliding groove is greater than the width of the other end of the first sliding groove;

[0017] The limiting structure includes a first limiting block and a second limiting block;

[0018] One side of the first limiting block is adapted to one side of the corresponding second limiting block;

[0019] The first limiting block and the second limiting block are connected by a spring.

[0020] Further, the limiting structure further includes a base;

[0021] The first limiting block and the second limiting block are hinged and fixed to the base by bolts.

[0022] Further, the base is connected to the mounting base by bolts.

[0023] Further, the sliding device is connected to the headrest by a rotating shaft.

[0024] Further, the chair headrest front-back adjustment device further includes a snap cover;

[0025] The mounting base is provided with a buckle;

[0026] The snap cover is snap-connected to the mounting base through the buckle.

[0027] Further, the bottom of the snap cover has N top blocks, where N is an integer greater than or equal to 1;

[0028] The top block abuts against the sliding device.

[0029] Further, a third sliding groove is provided on one side of the headrest;

[0030] One end of the sliding device is provided with a first connecting member;

[0031] The first connecting member is slidably connected to the third sliding groove.

[0032] Further, the chair headrest front-back adjustment device further includes a second connecting member;

[0033] The second connecting member is connected to the mounting base by a rotating shaft.

[0034] The present utility model provides a front-back adjustment device for a chair headrest. The limiting structure is slidably connected to the first sliding groove, and one end of the first sliding groove is adapted to the limiting structure. When the limiting structure slides to one end of the first sliding groove, the limiting structure is slidably assembled into one end of the first sliding groove, so that the front-back position of the headrest is fixed. The front-back adjustment device of the chair headrest has a compact structure and reduces the situation that the headrest sways back and forth. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] By describing the exemplary embodiments of the present utility model in more detail in conjunction with the drawings, the above and other objects, features and advantages of the present utility model will become more obvious. Among them, in the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0036] Figure 1 is a schematic structural diagram of the front-back adjustment device for a chair headrest in the present utility model;

[0037] Figure 2 is a front view of the front-back adjustment device for a chair headrest in the present utility model;

[0038] Figure 3 is an exploded structural diagram of the front-back adjustment device for a chair headrest in the present utility model;

[0039] Figure 4 is a partial structural diagram of the front-back adjustment device for a chair headrest in the present utility model;

[0040] Figure 5 is a schematic structural diagram of the base in the present utility model;

[0041] Figure 6 is a schematic structural diagram of the sliding device in the present utility model;

[0042] Figure 7 is a schematic structural diagram of the card cover in the present utility model;

[0043] Figure 8 is a schematic structural diagram of the first limiting block and the second limiting block being buckled in the present utility model;

[0044] Figure 9 is a schematic structural diagram of the first convex block in the present utility model;

[0045] Figure 10 is a schematic structural diagram of the second convex block in the present utility model;

[0046] Wherein:

[0047] 1. Headrest; 2. Sliding device; 3. Mounting seat;

[0048] 4. Card cover; 5. Second connecting piece; 101; Third sliding groove;

[0049] 201, First sliding groove; 21, First connecting piece; 31, Limiting structure;

[0050] 32, Snap; 311, First limiting block; 312, Second limiting block;

[0051] 313, Spring; 314, Base; 315, First convex block;

[0052] 316, Second convex block; 301 Second sliding groove; 41, Top block. Specific implementation mode

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] Refer to Figures 1 to 10 The present invention provides a front-back adjustment device for a chair headrest, including: a headrest 1, a sliding device 2 and a mounting seat 3; the sliding device 2 is connected to the headrest 1, and the mounting seat 3 is connected to the sliding device 2; a limiting structure 31 is provided on the mounting seat 3, and the limiting structure 31 is bolted to the mounting seat 3; a first sliding groove 201 is provided at the bottom of the sliding device 2; the limiting structure 31 is slidably connected to the first sliding groove 201; one end of the first sliding groove 201 is adapted to the limiting structure 31.

[0055] Specifically, one end of the first sliding groove 201 is the initial end, and the other end of the first sliding groove 201 is the end; when the limiting structure 31 slides to one end of the first sliding groove 201, the front-back position of the headrest 1 is the initial state; when the limiting structure 31 slides to the middle position of the first sliding groove 201, the position of the headrest 1 is adjusted to a relatively forward position; when the limiting structure 31 slides to the other end of the first sliding groove 201, the headrest 1 is adjusted to the most forward position.

[0056] One side of the limiting structure 31 close to the first sliding groove 201 is adapted to one end of the first sliding groove 201. When the limiting structure 31 slides to one end of the first sliding groove 201, one side of the limiting structure 31 is assembled to one end of the first sliding groove 201, so that the limiting structure 31 is fixed to one end of the first sliding groove 201, and the front-back position of the headrest 1 is fixed. The front-back adjustment device of the chair headrest has a compact structure and reduces the situation of the headrest shaking back and forth.

[0057] Furthermore, a second sliding groove 301 is provided on the mounting base 3; the sliding device 2 is located within the second sliding groove 301; the sliding device 2 is slidably connected to the mounting base 3 based on the second sliding groove 301.

[0058] Specifically, when the sliding device 2 is slidably connected to the mounting base 3 based on the second sliding groove 301, the sliding device 2 is slidably connected to the limiting structure 31.

[0059] Furthermore, the width of one end of the first sliding groove 201 is greater than the width of the other end of the first sliding groove 201; the limiting structure 31 includes a first limiting block 311 and a second limiting block 312; one side of the first limiting block 311 is adapted to one side of the corresponding second limiting block 312; the first limiting block 311 and the second limiting block 312 are connected by a spring.

[0060] Specifically, since the first limiting block 311 and the second limiting block 312 are connected by a spring 313, when the limiting structure 31 slides to the other end of the first sliding groove 201, the spring 313 is in a compressed state, and when the limiting structure 31 slides to one end of the first sliding groove 201, the spring 313 returns to its initial state, causing one side of the first limiting block 311 to move away from one side of the second limiting block 312.

[0061] When the limiting structure 31 slides to one end of the first sliding groove 201, one side of the first limiting block 311 moves away from the second limiting block 312. Since the width of one end of the first sliding groove 201 is greater than the width of the other end of the first sliding groove 201, when the limiting structure 31 slides to the other end of the first sliding groove 201, the first limiting block 311 is slidably connected to one side of the first sliding groove 312, the second limiting block 312 is slidably connected to the other side of the first sliding groove 201, and the first limiting block 311 and the second limiting block 312 are latched together, causing the limiting structure 31 to return to its initial state, facilitating the limiting structure 31 to enter the next cycle of front - and - back adjustment.

[0062] Furthermore, the limiting structure 31 further includes a base 314; the first limiting block 311 and the second limiting block 312 are hinged and fixed to the base 314 by bolts.

[0063] Specifically, a first convex block 315 is provided at the bottom of the first limiting block 311, a second convex block 316 is provided at the bottom of the second limiting block 312, a first limiting groove corresponding to the first convex block 315 is provided on the base 314, and a second limiting groove corresponding to the second convex block 316 is provided on the base 314; the first convex block 315 is connected in cooperation with the first limiting groove, and the second convex block 316 is connected in cooperation with the second limiting groove, thereby restricting the swing of the limiting structure 31.

[0064] Furthermore, the base 314 is connected to the mounting base 3 by bolts.

[0065] Specifically, the first limiting block 311 and the second limiting block 312 are hinged and fixed to the base 314 by bolts, ensuring that the first limiting block 311 and the second limiting block 312 are stably fixed to the base 314. The base 314 is connected to the mounting seat 3 by bolts, so that the limiting structure 31 is fixed to the mounting seat 3 based on the base 314.

[0066] Furthermore, the front-back adjustment device for the chair headrest further includes a clamping cover 4; the mounting seat 3 is provided with a buckle 32; the clamping cover 4 is covered and connected to the mounting seat 3 through the buckle 32.

[0067] Specifically, the clamping cover 4 is covered and connected to the mounting seat 3 through the buckle 32, ensuring that the limiting structure 31 is stably slidably connected to the first sliding groove 201, avoiding damage to the front-back adjustment device for the chair headrest caused by external interference, and extending the service life of the front-back adjustment device for the chair headrest.

[0068] Furthermore, the bottom of the clamping cover 4 has N top blocks 41, where N is an integer greater than or equal to 1; the top blocks 41 abut against the sliding device 2.

[0069] Specifically, the top blocks 41 abut against the sliding device 2, making the sliding device 2 not easy to slide, avoiding the headrest 1 moving back and forth due to the user accidentally touching the sliding device 2, and reducing the situation of the headrest shaking back and forth.

[0070] Furthermore, the sliding device 2 and the headrest 1 are connected by a rotating shaft.

[0071] Specifically, the sliding device 2 and the headrest 1 are connected by a rotating shaft, which can facilitate the user to independently adjust the tilt position of the headrest 1, and is convenient for the user to adjust the tilt angle of the headrest 1 according to the actual use situation, thereby improving the user's product usage experience.

[0072] Furthermore, a third sliding groove 101 is provided on one side of the headrest 1; one end of the sliding device 2 is provided with a first connecting member 21; the first connecting member 21 is slidably connected to the third sliding groove 101.

[0073] Specifically, the first connecting member 21 is slidably connected to the third sliding groove 101, which can adjust the up-down position of the headrest 1, and is convenient for the user to adjust the up-down position of the headrest 1 according to the actual use situation, thereby improving the user's product usage experience.

[0074] Furthermore, the front-back adjustment device for the chair headrest further includes a second connecting member 5; the second connecting member 5 is connected to the mounting seat 3 based on a rotating shaft.

[0075] Specifically, one end of the second connecting member 5 is fixed to the chair. The second connecting member 5 and the mounting base 3 are connected based on a rotating shaft, which facilitates the user to adjust the tilting angle of the mounting base 3. Since the mounting base 3 is connected to the sliding device 2 and the sliding device 2 is connected to the headrest 1, when the user adjusts the tilting angle of the mounting base 3, the sliding device 2 and the headrest 1 tilt following the tilting of the mounting base 3, thereby improving the user experience of using the product.

[0076] The present utility model provides a front-back adjustment device for a chair headrest. One end of the first sliding groove 201 is the initial end, and the other end of the first sliding groove 201 is the end; when the limiting structure 31 slides to one end of the first sliding groove 201, the front-back position of the headrest 1 is in the initial state; when the limiting structure 31 slides to the middle position of the first sliding groove 201, the position of the headrest 1 is adjusted to a relatively forward position; when the limiting structure 31 slides to the other end of the first sliding groove 201, the headrest 1 is adjusted to the most forward position.

[0077] One side of the limiting structure 31 close to the first sliding groove 201 is adapted to one end of the first sliding groove 201. When the limiting structure 31 slides to one end of the first sliding groove 201, one side of the limiting structure 31 is assembled to one end of the first sliding groove 201, so that the limiting structure 31 is fixed to one end of the first sliding groove 201, and the front-back position of the headrest 1 is fixed. The front-back adjustment device for the chair headrest has a compact structure and reduces the situation of the headrest shaking back and forth.

[0078] In addition, the above has introduced in detail the front-back adjustment device for the chair headrest provided by the embodiments of the present utility model. Specific examples should have been used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A chair headrest front and rear adjustment device, characterized in that: include: headrests, slides and mounts; The sliding device is connected to the headrest, and the mounting seat is connected to the sliding device; a limiting structure is provided on the mounting seat, and the limiting structure is bolted to the mounting seat; a first sliding groove is provided at the bottom of the sliding device; The limiting structure is slidably connected to the first sliding groove; One end of the first sliding groove is matched with the limiting structure.

2. The chair headrest front and rear adjustment device according to claim 1, characterized in that: The mounting seat is provided with a second sliding groove; The sliding device is located in the second sliding groove; The sliding device is slidably connected to the mounting seat based on the second sliding groove.

3. The chair headrest front and rear adjustment device according to claim 1, characterized in that: The width of one end of the first sliding groove is greater than the width of the other end of the first sliding groove; The limiting structure includes a first limiting block and a second limiting block; One side of the first limit block is adapted to a corresponding side of the second limit block; The first limiting block and the second limiting block are connected based on a spring.

4. The chair headrest front and rear adjustment device according to claim 3, characterized in that: The limiting structure also includes a base; The first limiting block and the second limiting block are hingedly fixed to the base based on bolts.

5. The chair headrest front and rear adjustment device according to claim 4, characterized in that: The base is connected to the mounting seat by bolts.

6. The chair headrest front and rear adjustment device according to claim 1, characterized in that: The sliding device is connected to the headrest via a rotating shaft.

7. The chair headrest front and rear adjustment device according to claim 1, characterized in that: The chair headrest front and rear adjustment device also includes a card cover; The mounting seat is provided with a buckle; The card cover is connected to the mounting seat through the snap cover.

8. The chair headrest front and rear adjustment device according to claim 7, characterized in that: The card cover has N top blocks at the bottom, where N is an integer greater than 1 or equal to 1; The top block abuts against the sliding device.

9. The chair headrest front and rear adjustment device according to claim 1, characterized in that: A third sliding groove is provided on one side of the headrest; A first connecting member is provided at one end of the sliding device; The first connecting member is slidably connected to the third sliding groove.

10. The chair headrest front and rear adjustment device according to claim 1, characterized in that: The chair headrest front and rear adjustment device also includes a second connecting member; The second connecting member is connected to the mounting seat based on a rotating shaft.

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