Adjustable headrest assembly and seat

Abstract

The utility model discloses an adjustable headrest assembly and seat, adjustable headrest assembly includes mounting seat, connecting seat, movable seat, headrest, headrest is installed on movable seat, and movable seat is installed on connecting seat and slides, and the locking piece is arranged between connecting seat and movable seat, and the locking piece is used for locking movable seat with connecting seat after movable seat is relative to connecting seat and slides to predetermined position, the mounting groove that is extended from its front end face to rear is provided on mounting seat, the connecting arm that is extended to rear and is embedded in the mounting groove is provided on movable seat, and the connecting arm is pivoted on mounting seat through a transversely -extending pivot to make the connecting arm can swing between the top surface and bottom surface of mounting groove, and the front end face of mounting seat is provided with two elastic elements between connecting seat, and two elastic elements are respectively arranged on the upper and lower sides of connecting arm, the utility model can provide stable support for the head of user, and the layout of headrest assembly on seat is convenient.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to an adjustable headrest assembly and a seat. Background Technology

[0002] The headrest assembly of a chair is used to support the user's head, preventing it from dangling and improving the chair's comfort. Most existing office chairs, gaming chairs, and study chairs are equipped with headrest assemblies. To increase the applicability of headrest assemblies and provide better comfort for users of different body types, existing headrest assemblies are usually height-adjustable. In some chairs, the headrest assembly is also required to be able to adjust its angle slightly to change the angle of the headrest support surface, maximizing the contact area between the headrest support surface and the user's head to distribute the reaction force exerted by the headrest on the user's head and further improve the comfort of the headrest assembly. However, these angle adjustment and height adjustment structures occupy a lot of space, especially in the front-back direction, and cannot provide stable support for the user's head. In particular, when the headrest is supporting the user's head, it is prone to abnormal tilting, affecting the comfort of the chair. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable headrest assembly and seat, which can reduce the space occupied by the headrest assembly and allow the headrest support surface to swing adaptively to adapt to the user's head, providing stable support for the user's head.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An adjustable headrest assembly, including a mounting base, a connecting base, a movable base, and a headrest;

[0006] The headrest is mounted on the movable seat, which is slidably mounted on the connecting seat so that the movable seat can move relative to the connecting seat in the vertical direction. A locking element is provided between the connecting seat and the movable seat, which is used to lock the movable seat and the connecting seat after the movable seat slides relative to the connecting seat to a predetermined position.

[0007] The mounting base has a mounting groove extending rearward from its front end; the movable base has a connecting arm extending rearward and embedded in the mounting groove, the connecting arm is pivotally connected to the mounting base via a laterally extending pivot so that the connecting arm can swing between the top and bottom surfaces of the mounting groove; two elastic elements are provided between the front end face of the mounting base and the connecting base, the two elastic elements being located on the upper and lower sides of the connecting arm respectively.

[0008] Preferably, the connecting seat includes a connecting block that slides with the movable seat, a connecting arm that extends rearward from the rear side of the connecting block, and the two ends of the elastic element abut against the front end face of the mounting seat and the rear side of the connecting block, respectively.

[0009] Preferably, the front end face of the mounting base is provided with a rearwardly extending insertion groove, and the elastic element is a spring sheet. The spring sheet includes a connecting section inserted into the insertion groove, a mating section that bends from the front end of the connecting section toward the connecting arm and abuts against the front end face of the mounting base, and an elastic section that bends from the mating section toward the direction away from the connecting arm. The end of the elastic section away from the connecting arm abuts against the rear side of the connecting block.

[0010] Preferably, the upper surface of the connecting arm is provided with a downwardly recessed upper limit groove that extends in the front-rear direction, and the elastic segment of the spring piece located above the connecting arm and the part connecting with the mating end are embedded in the upper limit groove; the lower surface is provided with an upwardly recessed lower limit groove that extends in the front-rear direction, and the elastic segment of the spring piece located below the connecting arm and the part connecting with the mating end are embedded in the lower limit groove.

[0011] Preferably, the rear end of the mounting groove is arc-shaped, and the distance between the top and bottom surfaces of the mounting groove gradually increases from back to front.

[0012] Preferably, the movable seat is provided with multiple locking slots arranged in the vertical direction; the locking element includes a housing fixed on the connecting seat, a steel ball embedded in the housing, and an elastic element located in the housing. The elastic element is used to apply elastic stress to the steel ball toward the movable seat, so that a part of the steel ball protrudes from the housing and is embedded in one of the locking slots.

[0013] Preferably, the connecting seat is provided with a dovetail groove extending from its upper end face to its lower end face, and the movable seat is provided with a slide with a cross-sectional shape consistent with the cross-sectional shape of the dovetail groove, and the slide is slidably embedded in the dovetail groove.

[0014] Preferably, the slide is provided with two clearance grooves extending upward from its lower end face. The portion of the slide located outside the clearance groove forms an elastic arm. A barb is provided on the outer side of the lower end of the elastic arm. The elastic arm is used to be squeezed towards the inner wall of the clearance groove by the dovetail groove when the slide is inserted into the dovetail groove from top to bottom. The barb is used to cooperate with the lower end face of the slide to form a limiting mechanism to prevent the slide from disengaging from the dovetail groove upward.

[0015] Preferably, the headrest includes a shaping cotton, a front connecting plate, and a rear connecting plate. The front connecting plate and the rear connecting plate are fixedly connected, the shaping cotton is sandwiched between the front connecting plate and the rear connecting plate, and the rear connecting plate is fixed to the movable seat.

[0016] The seat includes the aforementioned adjustable headrest assembly.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] In this invention, the headrest is adjustable up and down through the sliding engagement of the movable seat and the connecting seat. The connecting seat and the mounting seat rotate to allow the connecting seat to move the headrest up and down within a certain range. Two elastic elements are used to achieve adaptive up and down movement of the connecting seat, thereby allowing the headrest to move up and down within a small angle range with the connecting seat to adapt to the user's head angle and provide stable support for the user's head. Furthermore, the connecting seat and the movable seat occupy less space in the front and back direction, which facilitates the layout of the headrest assembly on the seat. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a schematic diagram of one usage state of the present invention;

[0022] Figure 4 This is an enlarged view of point A in diagram 2;

[0023] Figure 5 for Figure 2 BB cross-sectional view.

[0024] The components are as follows: 10. Mounting base; 11. Locking screw; 12. Mounting groove; 121. Top surface; 122. Bottom surface; 13. Insertion groove; 20. Connecting base; 21. Connecting block; 211. Dovetail groove; 22. Connecting arm; 221. Shaft hole; 222. Upper limit groove; 30. Movable base; 31. Locking groove; 32. Slide table; 321. Clearance groove; 322. Elastic arm; 323. Barb; 40. Headrest; 41. Rear connecting plate; 42. Front connecting plate; 43. Shaping cotton; 50. Locking element; 51. Housing; 52. Steel ball; 53. Elastic element; 60. Spring; 61. Connecting section; 62. Mating section; 63. Elastic section. Detailed Implementation

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0026] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] like Figure 1 , 2 As shown in Figures 3, 4, and 5, this utility model provides an adjustable headrest assembly, which includes a mounting base 10, a connecting base 20, a movable base 30, and a headrest 40. The headrest 40 is mounted on the movable base 30. The movable base 30 and the connecting base 20 slide together, allowing the movable base 30 to move relative to the connecting base 20 in the vertical direction. A locking member 50 is provided between the connecting base 20 and the movable base 30, allowing the movable base 30 to move up and down. After the movable base 30 is moved to a predetermined height, the headrest 40 is moved to a height suitable for supporting the user's head. The locking member 50 locks the movable base 30, which has been moved to the predetermined height, together with the connecting base 20, thus achieving the adjustment of the headrest 40's height. The mounting base 10 is provided with a mounting groove 12 extending rearward from its front end. The connecting base 20 is provided with a connecting arm 22 extending rearward. The connecting arm 22 is embedded inside the mounting groove 12, and the rear end of the connecting arm 22 is pivotally connected to the mounting base 10 through a laterally extending pivot, so that the connecting base 20 can swing up and down between the top surface 121 and the bottom surface 122 of the mounting groove 12. Two elastic elements are provided between the front end of the mounting base 10 and the connecting base 20, and the two elastic elements are respectively placed on the upper and lower sides of the connecting arm 22.

[0029] In this invention, the headrest 40 is adjustable up and down through the sliding engagement of the movable seat 30 and the connecting seat 20. The connecting seat 20 and the mounting seat 10 are rotated together, allowing the connecting seat 20 to drive the headrest 40 to swing up and down within a certain range. Two elastic elements are used to achieve adaptive up and down swing of the connecting seat 20, thereby enabling the headrest 40 to swing up and down within a small angle range with the connecting seat 20 to adapt to the user's head angle and provide stable support for the user's head. Furthermore, the connecting seat 20 and the movable seat 30 occupy less space in the front-to-back direction, which facilitates the layout of the headrest assembly on the seat.

[0030] In a preferred embodiment, the connecting seat 20 includes a connecting block 21 that slides with the movable seat 30. The connecting arm 22 extends rearward from the rear side of the connecting block 21. The two ends of the elastic element abut against the front end face of the mounting base 10 and the rear side face of the connecting block 21, respectively. Specifically, the elastic element is a spring sheet 60. A rearwardly extending insertion groove 13 is provided on the front end face of the mounting base 10. The spring sheet 60 includes a connecting section 61, a mating section 62, and an elastic section 63. The connecting section 61 is inserted into the insertion groove 13. The mating section 62 is bent from the front end of the connecting section 61 toward the connecting arm 22 and abuts against the front end face of the mounting base 10. The elastic section 63 is formed by bending the mating section 62 away from the connecting arm 22. The end of the elastic section 63 away from the connecting arm 22 abuts against the rear side face of the connecting block 21. The connecting section 61 is used to fix the spring sheet 60 to the mounting base 10. The front end of the seat 10, with the mating section 62 and the elastic section 63 forming a V-shaped elastic structure, undergoes elastic deformation when compressed by the rear side of the connecting block 21 and the front end face of the mounting seat 10. The resulting elastic stress varies with the magnitude of the deformation. When the headrest 40 swings downward with the user's head, the spring piece 60 located below the connecting arm 22 is compressed. As the downward swing angle of the headrest 40 increases, the elastic stress generated by the spring piece 60 gradually increases until the downward swing force exerted by the user's head on the headrest 40 and the elastic stress of the lower spring piece 60 tend to balance, thus achieving self-adaptive downward swing of the headrest 40. When the headrest 40 swings upward with the user's head, the elastic stress of the spring piece 60 above the connecting arm 22 tends to balance the upward swing force exerted by the user's head on the headrest 40, thus achieving self-adaptive upward swing of the headrest 40.

[0031] To ensure that the spring piece 60 can stably apply elastic stress to the connecting block 21, an upper limit groove 222 is provided on the upper surface of the connecting arm 22, which is recessed downward and extends in the front-rear direction. The portion where the elastic segment 63 and the mating segment 62 of the spring piece 60 located above the connecting arm 22 are connected is embedded in the upper limit groove 222, thereby limiting the left-right swinging degree of freedom of the spring piece 60. Similarly, a lower limit groove is provided on the lower surface of the connecting arm 22, which is recessed upward and extends in the front-rear direction. The portion where the elastic segment 63 and the mating segment 62 of the spring piece 60 located below the connecting arm 22 are connected is embedded in the lower limit groove, thereby limiting the left-right swinging degree of freedom of the spring piece 60. In the above structure, by limiting the spring piece 60, it is possible to prevent the spring piece 60 from swaying or detaching from the mounting base 10, so that the spring piece 60 can provide stable elastic stress.

[0032] It should be noted that the spring sheet 60 of this utility model can also be replaced by other elastic elements such as springs or elastic rubber blocks.

[0033] For ease of installation, the aforementioned pivot can be a locking screw 11. The connecting arm 22 is inserted from front to back into the mounting groove 12. The locking screw 11 is inserted from the side of the mounting base 10, aligned with the shaft hole 221 on the connecting arm 22, to connect the connecting base 20 and the mounting base 10 together, and the connecting arm 22 swings up and down in the mounting groove 12.

[0034] The rear end of the mounting groove 12 is set to be arc-shaped. The distance between the top surface 121 and the bottom surface 122 of the mounting groove 12 gradually increases from back to front, so that the mounting groove forms a structure that is larger in the front and smaller in the back. When the connecting arm 22 swings upward in the mounting groove 12, the upper surface of the connecting arm 22 has a large contact area with the top surface 121 of the mounting groove 12, thereby avoiding stress concentration between the connecting arm 22 and the mounting groove 12. Similarly, when the connecting arm 22 swings downward to fit against the bottom surface 122 of the mounting groove 12, the connecting arm 22 has a large contact area with the bottom surface 122.

[0035] The movable seat 30 is provided with multiple locking slots 31 arranged in the vertical direction. The locking member 50 includes a housing 51, a steel ball 52, and an elastic member 53. The housing 51 is fixedly connected to the connecting seat 20. Specifically, a groove can be provided on the connecting block 21 of the connecting seat 20, and the housing 51 is inserted into the groove to fix the housing 51 to the connecting seat 20. The steel ball 52 is embedded inside the housing 51. The elastic member 53 is located inside the housing 51 and applies an elastic stress to the steel ball 52 toward the movable seat 30, so that a part of the steel ball 52 protrudes from the front end of the housing 51. The part of the steel ball 52 protruding from the front end of the housing 51 is embedded in one of the locking slots 31, thereby locking the movable seat 30 and the connecting seat 20. When the movable seat 30 is moved up and down, the steel ball 52 is pushed out from the locking slot 31 and embedded in the locking slot 31 at the corresponding height position, realizing the up and down adjustment of the headrest 40. It should be noted that the elastic element 53 can be a spring, an elastic rubber block, an elastic sheet, etc.

[0036] The connecting seat 20 is provided with a dovetail groove 211 extending from its upper end face to its lower end face. Specifically, the dovetail groove 211 is provided on the connecting block 21. The movable seat 30 is provided with a slide 32 whose cross-sectional shape is consistent with the cross-sectional shape of the dovetail groove 211. The slide 32 is slidably embedded in the dovetail groove 211. Through the cooperation between the dovetail groove 211 and the slide 32, the movable seat 30 can move stably relative to the connecting seat 20 in the vertical direction. To facilitate the installation of the movable seat 30 onto the connecting seat 20, two clearance grooves 321 extending upward from their lower ends are provided on the slide table 32. A flexible arm 322 is formed on the portion of the slide table 32 located outside the clearance grooves 321. A barb 323 is provided on the outer side of the lower end of the flexible arm 322. When the slide table 32 is inserted into the dovetail groove 211 from top to bottom, the flexible arm 322 is pressed against the side of the dovetail groove 211 and pushed towards the interior of the clearance groove 321, causing the flexible arm 322 to deform and drive the barb 323 towards the clearance groove 211. The groove 321 is movable, so that the lower end of the slide 32 can be embedded in the dovetail groove 211. When the barb 323 is placed below the dovetail groove 211, the elastic arm 322 rebounds, and the barb 323 cooperates with the lower end face of the slide 32 to form a limiting mechanism that prevents the slide 32 from disengaging from the dovetail groove 211. In this way, when the movable seat 30 is assembled with the connecting seat 20, there is no need to install other limiting structures at the bottom of the movable seat 30, which simplifies the structure of the headrest assembly and makes the headrest assembly easy to assemble.

[0037] The headrest 40 includes a shaping cotton 43, a front connecting plate 42 and a rear connecting plate 41. The front connecting plate 42 and the rear connecting plate 41 are fixedly connected together. They can be connected by bolts or snaps to achieve an assemblable connection. The shaping cotton 43 is sandwiched between the front connecting plate 42 and the rear connecting plate 41. The rear connecting plate 41 is fixedly connected to the movable seat 30.

[0038] The seat of this utility model includes the aforementioned adjustable headrest assembly. The other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0039] Finally, it should be noted that the above embodiments are only optional embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An adjustable headrest assembly, characterized in that, Includes mounting base, connecting base, movable base, and headrest; The headrest is mounted on the movable seat, which is slidably mounted on the connecting seat so that the movable seat can move relative to the connecting seat in the vertical direction. A locking element is provided between the connecting seat and the movable seat, which is used to lock the movable seat and the connecting seat after the movable seat slides relative to the connecting seat to a predetermined position. The mounting base has a mounting groove extending rearward from its front end; the movable base has a connecting arm extending rearward and embedded in the mounting groove, the connecting arm is pivotally connected to the mounting base via a laterally extending pivot so that the connecting arm can swing between the top and bottom surfaces of the mounting groove; two elastic elements are provided between the front end face of the mounting base and the connecting base, the two elastic elements being located on the upper and lower sides of the connecting arm respectively.

2. The adjustable headrest assembly as claimed in claim 1, characterized in that, The connecting seat includes a connecting block that slides with the movable seat, a connecting arm that extends rearward from the rear side of the connecting block, and the two ends of the elastic element abut against the front end face of the mounting seat and the rear side face of the connecting block, respectively.

3. The adjustable headrest assembly as described in claim 2, characterized in that, The front end face of the mounting base is provided with a rearwardly extending insertion groove. The elastic element is a spring sheet. The spring sheet includes a connecting section inserted into the insertion groove, a mating section that bends from the front end of the connecting section toward the connecting arm and abuts against the front end face of the mounting base, and an elastic section that bends from the mating section away from the connecting arm. The end of the elastic section away from the connecting arm abuts against the rear side of the connecting block.

4. The adjustable headrest assembly as described in claim 3, characterized in that, The upper surface of the connecting arm is provided with a downward recessed upper limit groove that extends in the front-back direction. The elastic segment of the spring piece located above the connecting arm and the part that connects with the mating end are embedded in the upper limit groove. The lower surface is provided with an upward recessed lower limit groove that extends in the front-back direction. The elastic segment of the spring piece located below the connecting arm and the part that connects with the mating end are embedded in the lower limit groove.

5. The adjustable headrest assembly as claimed in claim 1, characterized in that, The rear end of the mounting groove is arc-shaped, and the distance between the top and bottom surfaces of the mounting groove gradually increases from back to front.

6. The adjustable headrest assembly as claimed in claim 1, characterized in that, The movable seat is provided with multiple locking slots arranged in the vertical direction; the locking component includes a housing fixed on the connecting seat, a steel ball embedded in the housing, and an elastic element located in the housing. The elastic element is used to apply elastic stress to the steel ball toward the movable seat, so that a part of the steel ball protrudes from the housing and is embedded in one of the locking slots.

7. The adjustable headrest assembly as claimed in claim 1, characterized in that, The connecting seat is provided with a dovetail groove extending from its upper end face to its lower end face, and the movable seat is provided with a slide with a cross-sectional shape that matches the cross-sectional shape of the dovetail groove, and the slide is slidably embedded in the dovetail groove.

8. The adjustable headrest assembly as claimed in claim 7, characterized in that, Two clearance grooves extending upward from their lower ends are provided on the slide. The portion of the slide located outside the clearance groove forms an elastic arm. A barb is provided on the outer side of the lower end of the elastic arm. The elastic arm is used to be squeezed towards the inner wall of the clearance groove by the dovetail groove when the slide is inserted into the dovetail groove from top to bottom. The barb is used to cooperate with the lower end face of the slide to form a limiting mechanism to prevent the slide from disengaging from the dovetail groove upward.

9. The adjustable headrest assembly as claimed in claim 1, characterized in that, The headrest includes a shaping cotton, a front connecting plate, and a rear connecting plate. The front and rear connecting plates are fixedly connected, and the shaping cotton is sandwiched between the front and rear connecting plates. The rear connecting plate is fixed to the movable seat.

10. A seat, characterized in that, Includes the adjustable headrest assembly as described in any one of claims 1-9.

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