Headrest Adjustment Mechanism

Abstract

This utility model belongs to the technical field of seat accessories, and provides a headrest adjustment mechanism, including a base, a first connecting member, a locking member, and an unlocking member. The first connecting member is pivotally connected to the base. The locking member is disposed on one side of the base and is connected to the base via a guide member. The guide member passes through the locking member and is fixedly connected to the base. A first engaging tooth is provided at the end of the locking member near the first connecting member. A second engaging tooth is provided on the first connecting member to engage with the first engaging tooth. An elastic member is connected to the locking member to keep the first engaging tooth and the second engaging tooth engaged. An unlocking member is also connected to the locking member to separate the first engaging tooth and the second engaging tooth. The first connecting member is connected to the headrest, and the base is connected to the seat body. The headrest angle is locked by the engagement of the first engaging tooth and the second engaging tooth. During adjustment, the first engaging tooth is separated from the second engaging tooth, the headrest is adjusted to the desired angle, and then the first engaging tooth and the second engaging tooth are engaged again to complete the adjustment.

Description

Technical Field

[0001] This utility model relates to the field of seat accessories technology, and in particular to a headrest adjustment mechanism. Background Technology

[0002] Nowadays, people are paying more and more attention to the comfort of their seats. Gaming chairs and some high-end office chairs are usually equipped with headrests, which provide head support when the user is in a reclining position, making the posture more comfortable. However, currently, a significant number of chairs do not have adjustable headrest angles, which is not user-friendly and affects the user experience. Higher-end gaming chairs or office chairs use motors to adjust the headrest angle, offering a high degree of automation, but the structure is more complex and the cost is higher. Currently, some chairs use friction to adjust and lock the headrest angle. Each part of the headrest and the connecting seat has a friction disc, and the headrest angle is maintained by friction between the discs. Adjusting the headrest angle is achieved by applying a friction force greater than that between the two discs. This adjustment method is simple in structure, relatively low in cost, and easy to adjust. However, with increased use, the friction discs wear down, leading to a decrease in the reliability of angle maintenance, or even the inability to adjust and maintain the headrest angle, thus affecting the user experience.

[0003] The technical problem to be solved by this utility model is: how to solve the problems of complex structure and high cost of existing seat headrests that use motor adjustment, and low durability and reliability of friction adjustment. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a headrest adjustment mechanism, which has the characteristics of simple structure and high reliability.

[0005] The technical solution adopted by this utility model is as follows: a headrest adjustment mechanism, including a base, a first connecting member, a locking member and an unlocking member. The first connecting member is pivotally connected to the base. The locking member is disposed on one side of the base and is connected to the base through a guide member. The guide member passes through the locking member and is fixedly connected to the base. A first engaging tooth is provided at one end of the locking member near the first connecting member. A second engaging tooth is provided on the first connecting member to engage with the first engaging tooth. An elastic member is connected to the locking member to keep the first engaging tooth and the second engaging tooth engaged. An unlocking member is also connected to the locking member to separate the first engaging tooth and the second engaging tooth.

[0006] The headrest adjustment mechanism of this application has a first connecting member connected to the headrest and a base connected to the seat body. The headrest angle is locked by the engagement of the first and second meshing teeth. When the headrest angle needs to be adjusted, the first and second meshing teeth are separated by the unlocking member, the headrest is adjusted to the required angle, and then the unlocking member is released. Under the action of the elastic member, the locking member is reset so that the first and second meshing teeth engage, thereby realizing the adjustment of the headrest angle. It has the characteristics of simple and reliable structure and convenient adjustment.

[0007] In some embodiments, the elastic element is sleeved on the outer surface of the guide element, and the end of the guide element away from the base is provided with an anti-disengagement part, and the two ends of the elastic element abut against the locking element and the anti-disengagement part respectively.

[0008] By adopting the above technical solution, the guide can not only provide guidance and limit for the sliding of the locking member, but also provide positioning for the elastic member, preventing the elastic member from shifting and affecting the reset of the locking member.

[0009] In some implementations, the unlocking element is connected to the side of the locking element that is closer to or further away from the elastic element.

[0010] Using the above technical solution, the unlocking component can be set on one side of the locking component as needed. When it is set on the side closer to the elastic component, the unlocking component needs to be pulled to separate the first engaging tooth from the second engaging tooth when unlocking. When the unlocking component is set on the side farther from the elastic component, the unlocking component needs to be pressed to separate the first engaging tooth from the second engaging tooth when unlocking.

[0011] In some embodiments, the base is provided with a clearance groove corresponding to the unlocking component, and the clearance groove penetrates the base.

[0012] By adopting the above technical solution, when the unlocking component is located on the side of the locking component away from the elastic component, an anti-cavity groove is opened on the base, which facilitates unlocking by pressing the unlocking component.

[0013] In some embodiments, a second connector is also included, which is pivotally connected to the base. The first connector and the second connector are respectively disposed at both ends of the base. A third meshing tooth is provided at the end of the locking member near the second connector, and a fourth meshing tooth is provided on the second connector to mesh with the third meshing tooth.

[0014] By adopting the above technical solution and setting a second connector that is connected to the seat body, the angle adjustment range of the headrest can be increased, providing users with more options.

[0015] In some embodiments, a first limiting member and a second limiting member are respectively provided at both ends of the base. The first limiting member corresponds to the first connecting member and is used to limit the rotation range of the first connecting member. The second limiting member corresponds to the second connecting member and is used to limit the rotation range of the second connecting member.

[0016] By adopting the above technical solution, the angle adjustment range can be limited by setting the first limiter and the second limiter to prevent the adjustment mechanism from being damaged due to exceeding the stroke during adjustment.

[0017] In some embodiments, a first connecting member is detachably connected to a first gear, a second meshing tooth is disposed on the first gear, a second connecting member is detachably connected to a second gear, and a fourth meshing tooth is disposed on the second gear.

[0018] The above technical solution facilitates the machining of meshing teeth.

[0019] In some embodiments, the two ends of the unlocking member are concave arc surfaces, and the first engaging tooth and the third engaging tooth are respectively disposed on the arc surfaces at both ends.

[0020] With the above technical solution, when locked, the first meshing tooth and the second meshing tooth, and the third meshing tooth and the fourth meshing tooth have a larger contact area, making the angle locking structure more reliable and helping to extend its service life.

[0021] In some implementations, the unlocking element and the locking element are detachably connected by fasteners.

[0022] The above technical solution facilitates processing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the headrest adjustment mechanism according to a preferred embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the headrest adjustment mechanism along the central axis of the base;

[0025] Figure 3 for Figure 1 The diagram shown is an exploded view of the headrest adjustment mechanism.

[0026] In the diagram: 100, headrest adjustment mechanism; 10, base; 11, clearance groove; 12, first limiting member; 13, second limiting member; 20, first connecting member; 21, second meshing tooth; 22, first gear; 30, locking member; 31, first meshing tooth; 32, third meshing tooth; 40, unlocking member; 50, guide member; 60, elastic member; 70, second connecting member; 71, fourth meshing tooth; 72, second gear. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. When the number of elements is referred to as "multiple," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figures 1 to 3A preferred embodiment of the present invention provides a headrest adjustment mechanism 100, comprising a base 10, a first connecting member 20, a locking member 30, and an unlocking member 40. The first connecting member 20 is pivotally connected to the base 10. The locking member 30 is disposed on one side of the base 10 and is connected to the base 10 via a guide member 50. The guide member 50 passes through the locking member 30 and is fixedly connected to the base 10. A first engaging tooth 31 is provided at one end of the locking member 30 near the first connecting member 20. A second engaging tooth 21 is provided on the first connecting member 20 to engage with the first engaging tooth 31. An elastic member 60 is connected to the locking member 30 to keep the first engaging tooth 31 and the second engaging tooth 21 engaged. An unlocking member 40 is also connected to the locking member 30 to separate the first engaging tooth 31 and the second engaging tooth 21. The headrest adjustment mechanism 100 of this application has a first connecting member 20 connected to the headrest and a base 10 connected to the seat body. The headrest angle is locked by the engagement of the first engaging tooth 31 and the second engaging tooth 21. When the headrest angle needs to be adjusted, the first engaging tooth 31 and the second engaging tooth 21 are separated by the unlocking member 40. The headrest is then adjusted to the required angle. The unlocking member 40 is then released, and under the action of the elastic member 60, the locking member 30 is reset to make the first engaging tooth 31 and the second engaging tooth 21 engage, thereby realizing the adjustment of the headrest angle. It has the characteristics of simple and reliable structure and convenient adjustment.

[0031] like Figure 1 and Figure 2 As shown, in this embodiment, the elastic element 60 is a compression spring, and it is sleeved on the outer surface of the guide element 50. An anti-disengagement portion is provided at the end of the guide element 50 away from the base 10. The diameter of the anti-disengagement portion is larger than the inner hole of the elastic element 60, and the inner hole of the elastic element 60 is larger than the outer diameter of the rod portion of the guide element 50. Both ends of the elastic element 60 abut against the locking element 30 and the anti-disengagement portion, respectively. The guide element 50 can both guide and limit the sliding of the locking element 30 and provide positioning for the elastic element 60, preventing displacement of the elastic element 60 and affecting the reset of the locking element 30. In other embodiments, other elastic elements 60 can be used, such as tension springs, urethane rubber, etc., and are not limited to compression springs.

[0032] Optionally, the unlocking element 40 is connected to the locking element 30 on the side near or away from the elastic element 60. The unlocking element 40 can be set on one side of the locking element 30 as needed. When it is set on the side near the elastic element 60, unlocking requires pulling the unlocking element 40 to separate the first engaging tooth 31 from the second engaging tooth 21; when the unlocking element 40 is set on the side away from the elastic element 60, unlocking requires pressing the unlocking element 40 to separate the first engaging tooth 31 from the second engaging tooth 21.

[0033] In this embodiment, the unlocking member 40 is connected to the side of the locking member 30 away from the elastic member 60. Correspondingly, the base 10 is provided with a clearance groove 11 corresponding to the unlocking member 40, and the clearance groove 11 penetrates the base 10. The clearance groove 11 on the base 10 facilitates unlocking by pressing the unlocking member 40, and also reduces the volume of the locking member 30, making the structure more compact.

[0034] In one embodiment, the headrest adjustment mechanism 100 of this application further includes a second connector 70, which is pivotally connected to the base 10. The first connector 20 and the second connector 70 are respectively disposed at both ends of the base 10. A locking member 30 is provided with a third engaging tooth 32 at one end near the second connector 70, and a fourth engaging tooth 71 that engages with the third engaging tooth 32 is provided on the second connector 70. By providing the second connector 70, which is connected to the seat body, the angle adjustment range of the headrest can be increased, providing users with more options.

[0035] Furthermore, a first limiting member 12 and a second limiting member 13 are respectively provided at both ends of the base 10. The first limiting member 12 corresponds to the first connecting member 20 and is used to limit the rotation range of the first connecting member 20. The second limiting member 13 corresponds to the second connecting member 70 and is used to limit the rotation range of the second connecting member 70. By providing the first limiting member 12 and the second limiting member 13, the angle adjustment range can be limited to prevent damage to the adjustment mechanism caused by exceeding the stroke during adjustment.

[0036] Furthermore, the first connecting member 20 is detachably connected to the first gear 22, and the second meshing tooth 21 is disposed on the first gear 22. The second connecting member 70 is detachably connected to the second gear 72, and the fourth meshing tooth 71 is disposed on the second gear 72. This design facilitates manufacturing, as the first connecting member 20 and the first gear 22 can be machined separately before being assembled together. Moreover, different meshing teeth with different pitches can be selected according to the adjustment range of the first connecting member 20, resulting in better versatility.

[0037] like Figure 3 As shown, preferably, both ends of the unlocking member 40 are concave arc surfaces, and the first engaging tooth 31 and the third engaging tooth 32 are respectively disposed on the arc surfaces at both ends. When locked, the first engaging tooth 31 and the second engaging tooth 21, and the third engaging tooth 32 and the fourth engaging tooth 71 have a larger contact area, making the angle locking structure more reliable and helping to extend its service life.

[0038] Preferably, the unlocking component 40 and the locking component 30 are detachably connected by fasteners. This technical solution facilitates processing, allowing the unlocking component 40 and the locking component 30 to be manufactured separately before being assembled together. Furthermore, the unlocking component 40 and the locking component 30 can be made of different materials, resulting in a richer texture.

[0039] In other embodiments, the unlocking member 40 and the locking member 30 may also be integrally formed.

[0040] The working principle of the headrest adjustment mechanism 100 in this application is as follows:

[0041] The first connector 20 is connected to the headrest, and the second connector 70 is connected to the seat body. During adjustment, the elastic element 60 is compressed by pressing the unlocking element 40. The unlocking element 40 slides away from the base 10 along the guide element 50, and the first engaging tooth 31 separates from the second engaging tooth 21, the third engaging tooth 32 separates from the fourth engaging tooth 71, and so on. Then, the relative angle between the first connector 20, the second connector 70 and the base 10 is adjusted as needed. After the headrest is at the required angle, the unlocking element 40 is released, and the locking element 30 is reset under the action of the elastic element 60. Then, the headrest is gently swung so that the first engaging tooth 31 engages with the second engaging tooth 21, the third engaging tooth 32 engages with the fourth engaging tooth 71, and the headrest angle is locked, thus completing the adjustment of the headrest.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A headrest adjustment mechanism, characterized in that: The device includes a base (10), a first connector (20), a locking member (30), and an unlocking member (40). The first connector (20) is pivotally connected to the base (10). The locking member (30) is disposed on one side of the base (10) and is connected to the base (10) via a guide member (50). The guide member (50) passes through the locking member (30) and is fixedly connected to the base (10). The locking member (30) has a first engagement tooth (31) at one end near the first connector (20). The first connector (20) has a second engagement tooth (21) that engages with the first engagement tooth (31). The locking member (30) is connected to an elastic member (60) that keeps the first engagement tooth (31) and the second engagement tooth (21) engaged. The locking member (30) is also connected to an unlocking member (40) that separates the first engagement tooth (31) and the second engagement tooth (21).

2. The headrest adjustment mechanism according to claim 1, characterized in that, The elastic element (60) is sleeved on the outer surface of the guide element (50). The guide element (50) has an anti-detachment part at one end away from the base (10). The two ends of the elastic element (60) respectively abut against the locking element (30) and the anti-detachment part.

3. The headrest adjustment mechanism according to claim 2, characterized in that, The unlocking member (40) is connected to the side of the locking member (30) that is close to or far from the elastic member (60).

4. The headrest adjustment mechanism according to claim 3, characterized in that, The base (10) is provided with an anti-air groove (11) corresponding to the unlocking member (40), and the anti-air groove (11) penetrates the base (10).

5. The headrest adjustment mechanism according to claim 1, characterized in that, It also includes a second connector (70), which is pivotally connected to the base (10), and the first connector (20) and the second connector (70) are respectively disposed at both ends of the base (10). The locking member (30) is provided with a third meshing tooth (32) at one end near the second connector (70), and the second connector (70) is provided with a fourth meshing tooth (71) that meshes with the third meshing tooth (32).

6. The headrest adjustment mechanism according to claim 5, characterized in that, The base (10) is provided with a first limiting member (12) and a second limiting member (13) at its two ends respectively. The first limiting member (12) corresponds to the first connecting member (20) and is used to limit the rotation range of the first connecting member (20). The second limiting member (13) corresponds to the second connecting member (70) and is used to limit the rotation range of the second connecting member (70).

7. The headrest adjustment mechanism according to claim 5, characterized in that, The first connector (20) is detachably connected to the first gear (22), the second meshing tooth (21) is disposed on the first gear (22), the second connector (70) is detachably connected to the second gear (72), and the fourth meshing tooth (71) is disposed on the second gear (72).

8. The headrest adjustment mechanism according to claim 7, characterized in that, The two ends of the unlocking member (40) are concave arc surfaces, and the first meshing tooth (31) and the third meshing tooth (32) are respectively disposed on the arc surfaces at both ends.

9. The headrest adjustment mechanism according to claim 1, characterized in that, The unlocking component (40) and the locking component (30) are detachably connected by fasteners.

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