Adjustable headrest for a seat

Abstract

The utility model belongs to office appliance technical field, concretely relates to adjustable headrest of seat, including adjusting pivot, one side of adjusting pivot is currently provided with lifting slide, be provided with headrest frame of the headrest frame short side direction sliding of lifting slide on lifting slide, still be provided with telescopic slide of the length direction perpendicular to lifting slide of adjusting pivot, be provided with the adjusting slide of the length direction sliding of telescopic slide on telescopic slide, adjusting slide is locked with telescopic slide through adjusting assembly and is connected with the rotary joint of connecting support. The end of adjusting pivot not only can cooperate headrest frame and carry out height adjustment and the setting of pitch angle, but also can realize the translation of before and after on connecting support, make headrest frame more protrude forward than backrest on the existing height position, guarantee the physiological structure of adaptation different user under the condition of convenient operation.

Description

Technical Field

[0001] This utility model belongs to the field of office equipment technology, specifically relating to an adjustable headrest for a chair. Background Technology

[0002] In recent years, due to the impact of the pandemic, more and more people are working online from home. Working online means that users spend a lot of time sitting in chairs, facing the computer. Office chairs have become a widely used seat for people's work and life. Some office chairs with headrests are also standard configurations, as office chairs with headrests can improve people's comfort when working.

[0003] A headrest mechanism with adjustable height and fore-aft position disclosed in patent CN217337932U includes a connecting frame at the top of a chair back frame and a headrest mounted on the connecting frame. The connecting frame includes a base frame fixed to the top of the chair back frame and a flip-up frame hinged to the base frame and adjustable fore-aft rotation. The headrest includes a headrest frame and a support frame connecting the top and bottom of the headrest frame. The support frame has adjustment grooves extending along its length and passing through both sides of the support frame. The flip-up frame has a rotating shaft extending in the left-right direction and inserted into the adjustment groove. The rotating shaft can rotate around its central axis and can slide relative to the support frame along the length of the adjustment groove. The beneficial effect of this invention is that it allows adjustment in both height and fore-aft dimensions, expanding its adaptability.

[0004] In the above solution, although the headrest frame can be adjusted up and down relative to the flip frame, it lacks the ability to adjust the headrest frame forward and backward relative to the backrest, making it unsuitable for different users' head and back structures and potentially causing user fatigue. Even if the flip frame and base frame can be moved by swinging, the height of the headrest frame needs to be changed again to compensate for the reduced distance caused by the swing adjustment. The operation of adjusting the headrest forward and backward is also more cumbersome and the range is very limited. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems by providing an adjustable headrest for a seat that can solve the technical issues described above.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The adjustable headrest of the seat includes an adjustment pivot, on one side of which a lifting slide plate is rotatably mounted. A headrest frame that slides along the short side of the lifting slide plate is mounted on the lifting slide plate. The adjustment pivot also has a telescopic slide plate perpendicular to the length of the lifting slide plate. An adjustment slider that slides along the length of the telescopic slide plate is mounted on the telescopic slide plate. The adjustment slider is locked to the telescopic slide plate by an adjustment component and is rotatably connected to a connecting bracket.

[0007] In the adjustable headrest of the seat, telescopic slide rails are provided on the two long sides of the lifting slide plate, and the adjusting slider is provided with a hook structure that simultaneously engages with the two telescopic slide rails. The hook structure slides along the length of the telescopic slide plate with the telescopic slide rails.

[0008] In the adjustable headrest of the seat, a slide rail rib is provided on the corresponding surface of the telescopic slide rail and the hook structure. The slide rail rib slides in contact with the hook structure and extends along the length direction of the telescopic slide plate.

[0009] In the adjustable headrest of the seat, the adjustment assembly includes an adjustment lock block disposed on the adjustment slider and a locking groove formed on the lifting slide plate, wherein the adjustment lock block and the locking groove abut against each other along the length direction of the telescopic slide plate.

[0010] In the adjustable headrest of the seat, a limit lock groove is provided on the adjustment slider, and the adjustment lock block is in the limit lock groove, through which the lock head provided on the adjustment lock block is pushed against the locking groove side by a spring.

[0011] In the adjustable headrest of the seat, the limiting lock groove includes a swing axis position and a spring setting position. The end of the adjusting lock block away from the lock head abuts against the swing axis position, and the spring is installed in the spring setting position to apply elastic force to the end of the adjusting lock block near the lock head.

[0012] In the adjustable headrest of the seat, the lock head is higher than the limiting lock groove and extends into the locking groove.

[0013] In the adjustable headrest of the seat, a plurality of the locking slots are arranged along the length direction of the telescopic sliding plate.

[0014] In the adjustable headrest of the seat, a lifting rail is longitudinally arranged on the headrest frame, and the lifting slide plate slides relative to the lifting rail along the short side of the lifting slide plate.

[0015] In the adjustable headrest of the seat, the lifting track includes a lifting slide groove formed on the headrest frame and a slide groove pressure plate covering the lifting slide groove. A plurality of positioning holes are formed on the bottom of the lifting slide groove, and positioning protrusions are provided on the lifting slide plate to cooperate with the corresponding positioning holes.

[0016] The advantages of this utility model are: The end of the adjustment hub not only works with the headrest frame for height and tilt adjustment, but also allows for forward and backward translation on the connecting bracket. This makes the headrest frame protrude further forward than the backrest in its current height position, ensuring a comfortable fit for different users' physiological structures while maintaining ease of operation. Furthermore, the connecting bracket and adjustment hub can be further adjusted for tilt, giving the front headrest frame a wider range of adjustment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the adjustment center component of this utility model.

[0020] Figure 4 This is a schematic diagram of the adjusting slider structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the telescopic sliding plate structure of this utility model.

[0022] Figure 6 This is a schematic diagram of the rotating structure of the adjusting pivot and connecting bracket of this utility model.

[0023] In the diagram, the components are: 1. Adjustment pivot; 2. Lifting slide plate; 21. Positioning protrusion; 3. Telescopic slide plate; 31. Telescopic slide rail; 32. Slide rail rib; 4. Headrest frame; 42. Lifting slide groove; 43. Slide groove pressure plate; 44. Positioning hole; 5. Adjustment slider; 51. Hook structure; 52. Limit lock groove; 53. Spring; 61. Adjustment lock block; 62. Locking groove; 63. Lock head; 7. Connecting bracket; 8. Screw; 9. Strip protrusion. Detailed Implementation

[0024] The following are specific embodiments of the utility model, which are described in conjunction with the accompanying drawings to further illustrate the technical solution of the utility model. However, the utility model is not limited to these embodiments.

[0025] like Figures 1-6 As shown, the adjustable headrest of the seat includes an adjustment pivot 1. A lifting slide plate 2 is rotatably mounted on one side of the adjustment pivot 1. A headrest frame 4 that slides along the short side of the lifting slide plate 2 is mounted on the lifting slide plate 2. A telescopic slide plate 3 that is perpendicular to the length of the lifting slide plate 2 is also mounted on the adjustment pivot 1. An adjustment slider 5 that slides along the length of the telescopic slide plate 3 is mounted on the telescopic slide plate 3. The adjustment slider 5 is locked to the telescopic slide plate 3 by an adjustment component and is rotatably connected to the connecting bracket 7.

[0026] In other words, the end of the adjustment hub can not only be used to adjust the height and tilt angle of the headrest frame, but also to move forward and backward on the connecting bracket. This allows the headrest frame to protrude further forward than the backrest in its current height position, ensuring a comfortable fit for different users' physiological structures while maintaining ease of operation. Furthermore, the connecting bracket and adjustment hub can be further adjusted to change the tilt angle, giving the front headrest frame a wider range of adjustment.

[0027] In this embodiment, telescopic slide rails 31 are provided on the two long sides of the telescopic slide plate 3, and the adjusting slider 5 is provided with hook structure 51 that is simultaneously engaged with the two telescopic slide rails 31. The hook structure 51 and the telescopic slide rails 31 slide along the length direction of the telescopic slide plate 3.

[0028] The hook structure forms a three-sided contact with the telescopic slide rail, so that the adjusting slider can only move along the length of the telescopic slide plate 3.

[0029] In this embodiment, a slide rail rib 32 is provided on the corresponding surface of the telescopic slide rail 31 and the hook structure 51. The slide rail rib 32 slides in contact with the hook structure 51 and extends along the length direction of the telescopic slide plate 3.

[0030] The guide rail ribs lift up part of the contact surface of the hook structure, reducing the friction between the hook structure and the telescopic guide rail, making the adjustment slider move more smoothly on the telescopic guide rail. Guide rail ribs are provided on three surfaces of the telescopic guide rail corresponding to the hook structure, and all three ribs are in contact with the surface of the hook structure, making the slider move more stably on the telescopic guide rail.

[0031] In this embodiment, the adjustment component includes an adjustment lock block 61 disposed on the adjustment slider 5 and a locking groove 62 formed on the lifting slide plate 2. The adjustment lock block 61 and the locking groove 62 abut against each other along the length direction of the telescopic slide plate 3.

[0032] The interplay between the locking block and the slot ensures precise positioning of the headrest's telescopic position. Users can easily lock or unlock the position by pulling or pressing, ensuring convenient and safe adjustment.

[0033] In this embodiment, a limiting lock groove 52 is provided on the adjusting slider 5, and the adjusting lock block 61 is in the limiting lock groove 52, through the spring 53, the lock head 63 provided on the adjusting lock block 61 is pushed against the locking groove 62 side.

[0034] The locking mechanism utilizes the spring force to automatically reset the locking block, achieving an automatic locking function. Once the user adjusts it to the correct position, no further operation is required, enhancing both convenience and security.

[0035] In this embodiment, the limiting lock groove 52 includes a swing axis center position and a spring setting position. The end of the adjusting lock block 61 away from the lock head 63 abuts against the swing axis center position, and the spring is installed in the spring setting position to apply elastic force to the end of the adjusting lock block 61 near the lock head 63.

[0036] The locking block moves in an oscillating manner to avoid damage caused by shearing force at a single point, thus enhancing the durability and reliability of the locking assembly.

[0037] In this embodiment, the lock head 63 is higher than the limiting lock groove 52 and extends into the locking groove 62.

[0038] A secure positioning is achieved by a mechanical lock that extends into the groove. This design ensures that the headrest will not easily shift under impact or pressure. The swing of the adjusting block and the locking stop are distributed in two grooves, each groove bearing the stress required for its corresponding state, ensuring that the telescopic slide and the adjusting slider maintain the strength of their respective groove structures.

[0039] In this embodiment, a plurality of locking slots 62 are arranged along the length of the telescopic sliding plate 3.

[0040] The headrest frame offers multiple adjustment positions, allowing users to select different positions as needed, improving the precision and comfort of the adjustment.

[0041] In this embodiment, a lifting track is longitudinally arranged on the headrest frame 4, and the lifting slide plate 2 slides relative to the lifting track along the short side of the lifting slide plate 2.

[0042] The lifting track, in conjunction with the sliding plate, allows for flexible adjustment of the headrest height to meet the needs of passengers of different heights, enhancing support comfort and safety.

[0043] In this embodiment, the lifting track includes a lifting slide 42 formed on the headrest frame 4 and a slide plate 43 covering the lifting slide 42. The bottom of the lifting slide 42 is provided with a plurality of positioning holes 44, and the lifting slide plate 2 is provided with positioning protrusions 21 that cooperate with the corresponding positioning holes 44.

[0044] The positioning protrusion and the hole work together to form a reliable lock, so that the head can be stably held after the height is adjusted, preventing it from loosening or slipping.

[0045] The positioning protrusion is installed on the lifting slide plate by screw 8. After long-term adjustment and use, the positioning protrusion may become misaligned and worn, and the user can quickly replace it.

[0046] In this embodiment, the lifting slide plate 2, the adjusting pivot 1, the adjusting slider 5, and the connecting bracket 7 are all rotatably connected to their respective corresponding components by screws 8 on both sides, and a limiting groove and a limiting protrusion are respectively provided between the two relatively rotating components.

[0047] The limiting protrusion slides with the component in the arc-shaped limiting groove and abuts against the two stroke endpoints of the limiting groove, thereby limiting the maximum rotation angle of the two rotating components and preventing interference with other components.

[0048] Among them, the inner wall of the through hole for the adjustment pivot 1 and the connecting bracket 7 to insert the screw 8 is provided with several axially extending strip-shaped protrusions 9. The protrusions circumferentially abut against the outer circumference of the screw 8. When the two rotating parts move, they are accompanied by a certain amount of frictional resistance, so that the headrest frame can be positioned at a certain angle.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An adjustable headrest for a seat, including an adjustment pivot (1), characterized in that, A lifting slide plate (2) is rotatably provided on one side of the adjustment pivot (1). A headrest frame (4) that slides along the short side of the lifting slide plate (2) is provided on the lifting slide plate (2). A telescopic slide plate (3) that is perpendicular to the length of the lifting slide plate (2) is also provided on the adjustment pivot (1). An adjustment slider (5) that slides along the length of the telescopic slide plate (3) is provided on the telescopic slide plate (3). The adjustment slider (5) is locked to the telescopic slide plate (3) by the adjustment component and is rotatably connected to the connecting bracket (7).

2. The adjustable headrest of the seat according to claim 1, characterized in that, The telescopic slide plate (3) is provided with telescopic slide rails (31) on its two long sides. The adjusting slider (5) is provided with hook structure (51) that is simultaneously engaged with the two telescopic slide rails (31). The hook structure (51) and the telescopic slide rails (31) slide along the length direction of the telescopic slide plate (3).

3. The adjustable headrest of the seat according to claim 2, characterized in that, The telescopic slide rail (31) and the hook structure (51) are provided with slide rail ribs (32), the slide rail ribs (32) slide in contact with the hook structure (51) and extend along the length direction of the telescopic slide plate (3).

4. The adjustable headrest of the seat according to claim 1, characterized in that, The adjustment assembly includes an adjustment lock block (61) disposed on the adjustment slider (5) and a locking groove (62) opened on the lifting slide plate (2), wherein the adjustment lock block (61) and the locking groove (62) abut against each other along the length direction of the telescopic slide plate (3).

5. The adjustable headrest of the seat according to claim 4, characterized in that, The adjusting slider (5) has a limit lock groove (52), and the adjusting lock block (61) is in the limit lock groove (52) by a spring (53) causing the lock head (63) on the adjusting lock block (61) to abut against the locking groove (62) side.

6. The adjustable headrest of the seat according to claim 5, characterized in that, The limiting lock groove (52) includes a swing axis center position and a spring setting position. The end of the adjusting lock block (61) away from the lock head (63) abuts against the swing axis center position. The spring is installed in the spring setting position to apply elastic force to the end of the adjusting lock block (61) near the lock head (63).

7. The adjustable headrest of the seat according to claim 5, characterized in that, The lock head (63) is higher than the limiting lock groove (52) and extends into the locking groove (62).

8. The adjustable headrest of the seat according to claim 4, characterized in that, Several of the locking slots (62) are arranged along the length of the telescopic slide plate (3).

9. The adjustable headrest of the seat according to claim 1, characterized in that, The headrest frame (4) is longitudinally provided with a lifting track, and the lifting slide plate (2) slides relative to the lifting track along the short side of the lifting slide plate (2).

10. The adjustable headrest of the seat according to claim 9, characterized in that, The lifting track includes a lifting slide (42) opened on the headrest frame (4) and a slide plate (43) covering the lifting slide (42). The bottom of the lifting slide (42) is provided with a plurality of positioning holes (44). The lifting slide (2) is provided with positioning protrusions (21) that cooperate with the corresponding positioning holes (44).

Images