An adjustable seat headrest

Abstract

The utility model provides an adjustable seat headrest for solving the technical problem that the prior art headrest of seat mentioned in the background art realizes the lifting in the fixed plate through the screw rod drive lifting plate, but due to the height of lifting the lifting plate through the rotation of screw rod, the user needs to rotate the screw rod constantly, when the height difference that the user needs to adjust is larger, the time that the user needs to rotate is longer, and the user is inconvenient to use, which comprises a mounting frame fixedly installed on the seat, a moving frame is vertically slidably arranged in the mounting frame, a connecting frame is transversely slidably arranged on the moving frame, a headrest is rotatably arranged at the end of the connecting frame, a moving assembly for adjusting the vertical position of the moving frame is arranged in the moving frame, and an adjusting assembly for adjusting the transverse position of the connecting frame is arranged on the moving frame.

Description

Technical Field

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

[0002] For office chairs, the headrest is a relatively important support structure, which can support the human head and neck and relieve fatigue from sitting.

[0003] An existing technology, such as the invention patent document with authorization announcement number "CN221887970U" and patent name "An Adjustable Headrest Office Chair", discloses a chair including an office chair. The back of the office chair is fixedly provided with a fixed plate, and a lifting plate is slidably provided in the fixed plate. The back of the office chair is provided with a height adjustment device below the fixed plate and is poweredly connected to the lifting plate. The upper part of the lifting plate is provided with a front and rear adjustment device, and the end of the front and rear adjustment device is connected to a headrest through an angle adjustment device.

[0004] The aforementioned patent document describes how a lifting plate is raised and lowered within a fixed plate by driving a lead screw. However, since raising the height of the lifting plate by rotating the lead screw requires the user to continuously rotate the lead screw, the rotation time required is long when the height difference to be adjusted is large, making it inconvenient for the user. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by proposing an adjustable seat headrest. This addresses the technical problem mentioned in the background art: the headrest of the existing seat uses a lead screw to drive a lifting plate within a fixed plate to raise and lower. However, because the user needs to continuously rotate the lead screw to raise the height of the lifting plate, the rotation time required is long when the height difference to be adjusted is large, which is inconvenient for the user.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a mounting frame fixedly installed on a seat, a movable frame slidingly passing through the mounting frame vertically, a connecting frame slidingly on the movable frame, a headrest rotatably provided at the end of the connecting frame, a movable component for adjusting the vertical position of the movable frame inside the movable frame, and an adjusting component for adjusting the horizontal position of the connecting frame on the movable frame.

[0007] Working principle:

[0008] Users can adjust the vertical height of the headrest by operating the movable component inside the movable frame, which drives the movable frame to slide vertically along the mounting frame. Users can also adjust the front and back position of the headrest by adjusting the connecting frame to slide horizontally on the movable frame. The headrest can rotate around the end of the connecting frame to adapt to the user's head tilt angle and improve the fit.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The vertical height of the movable frame can be changed by moving the component, and the horizontal position of the connecting frame on the movable frame can be changed by adjusting the component. Thus, the vertical height and horizontal position of the headrest can be changed by moving and adjusting the components to meet the personalized needs of different users. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0012] Figure 2 A schematic diagram of the assembly structure of the mounting frame and the movable frame;

[0013] Figure 3 for Figure 2 Enlarged cross-sectional view of point A in the middle;

[0014] Figure 4 for Figure 2 Enlarged cross-sectional view of section B;

[0015] Figure 5 for Figure 1 Enlarged cross-sectional view of the structure at point C.

[0016] Explanation of reference numerals in the attached drawings: Mounting bracket 1, Moving bracket 2, Connecting bracket 3, Headrest 4, Moving cavity 5, Mounting cavity 6, Guide rod 7, Snap-fit ​​block 8, Pressing rod 9, Fixing rod 10, First snap-fit ​​hole 11, Second snap-fit ​​hole 12, Sliding groove 13, Fixing block 14, Limiting block 15, First spring 16, Sliding block 17, Sliding groove 18, Mounting post 19, Pressing post 20, Second spring 21, Abutment block 22, Locking block 23, Through groove 24, First connecting rod 25, Second connecting rod 26, Third spring 27. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0018] Example:

[0019] like Figure 1 and Figure 2As shown, an adjustable seat headrest includes a mounting frame 1 fixedly installed on the seat. A movable frame 2 slides vertically through the mounting frame 1. A movable cavity 5 is formed in the mounting frame 1. The movable frame 2 is slidably disposed in the movable cavity 5. An installation cavity 6 is formed in the movable frame 2. The movable component is disposed in the installation cavity 6. The movable cavity 5 provides a guide rail for the lifting and lowering of the movable frame 2, ensuring that it can only move smoothly in the vertical direction. The installation cavity 6 serves as a sealed space to accommodate the movable component, protecting the internal mechanism from external interference and ensuring its long-term reliable operation.

[0020] like Figure 1 and Figure 4 As shown, a connecting frame 3 is slidably mounted on the movable frame 2. Slider 17 is fixed on both sides of the movable frame 2. Sliding grooves 18 are opened on both sides of the inner wall of the connecting frame 3. The two sliding grooves 18 are respectively slidably mounted on the two sliders 17. The sliders 17 are embedded in the sliding grooves 18, so that the connecting frame 3 can move back and forth in a straight line relative to the movable frame 2 without offset or twisting.

[0021] like Figure 1 and Figure 5 As shown, a headrest 4 is rotatably mounted at the end of the connecting frame 3. A hollow first connecting rod 25 is rotatably mounted on the connecting frame 3. A second connecting rod 26 is slidably mounted inside the first connecting rod 25. The end of the second connecting rod 26 away from the first connecting rod 25 is rotatably connected to the headrest 4. A third spring 27 is mounted inside the first connecting rod 25. The two ends of the third spring 27 are fixed to the inner wall of the first connecting rod 25 and the end of the second connecting rod 26, respectively. The second connecting rod 26 can slide inside the first connecting rod 25 and is supported by the third spring 27. When the head rests on the headrest 4 and pressure is applied, the spring can be compressed to provide cushioning. When the head moves, the headrest 4 can also generate a certain degree of adaptive floating to improve dynamic comfort.

[0022] like Figure 1 and Figure 2 and Figure 3As shown, the movable frame 2 is equipped with a movable assembly for adjusting the vertical position of the movable frame 2. The movable assembly includes two guide rods 7, two locking blocks 8, a pressing rod 9, and a fixing rod 10. The two guide rods 7 are fixed to both sides of the inner wall of the mounting cavity 6. The two locking blocks 8 are slidably mounted on the two guide rods 7. The mounting frame 1 has several first locking holes 11 on both sides, and the movable frame 2 has second locking holes 12 on both sides. The ends of the two locking blocks 8 can slide through the two second locking blocks 8 and be mounted on the mounting frame 1. Two of the first snap-fit ​​holes 11 on the mounting bracket 1 are engaged. The pressing rod 9 slides through the movable bracket 2 and extends into the mounting cavity 6. The fixing rod 10 is fixed to the end of the pressing rod 9. Each of the two snap-fit ​​blocks 8 has a sliding groove 13. The fixing rod 10 slides through the two sliding grooves 13 in sequence. A fixing block 14 is fixed in the mounting cavity 6. The pressing rod 9 slides through the fixing block 14. A limiting block 15 is fixed to the end of the pressing rod 9 away from the fixing rod 10. The limiting block 15 abuts against the inner wall of the mounting cavity 6. The pressing rod... A first spring 16 is fitted onto the headrest 9. Both ends of the first spring 16 are fixedly connected to the limiting block 15 and the fixing block 14. Under the thrust of the first spring 16, the pressing rod 9 is in a pop-out state, causing the limiting block 15 to abut against the inner wall of the mounting cavity 6. The fixing rod 10, fixed to the limiting block 15, is located near the two sliding grooves 13. At this time, the two locking blocks 8 are pushed outwards on the guide rod 7, and their ends pass through the second locking hole 12 on the movable frame 2 and are inserted into the first locking hole 11 of the mounting frame 1, thereby achieving rigid locking and fixing the height of the headrest 4. Pressing the pressing rod 9 pushes the fixing rod 10 to move further along the sliding groove 13. The inclined design of the sliding groove 13 will convert the longitudinal movement of the fixing rod 10 into the opposing horizontal movement of the two locking blocks 8, causing them to retract from the first locking hole 11 and release the lock. At this time, the user can move the entire moving frame 2 up and down to the desired height. Releasing the pressing rod 9, the fixing rod 10 returns to its original position under the action of the first spring 16, pushing the two locking blocks 8 outward and automatically inserting them into the next set of first locking holes 11 that are currently aligned, thus completing the locking at the new height.

[0023] like Figure 1 and Figure 2 and Figure 4As shown, the movable frame 2 is equipped with an adjustment assembly for adjusting the lateral position of the connecting frame 3. The adjustment assembly includes two hollow mounting posts 19, two pressing posts 20, two second springs 21, several abutment blocks 22, and two locking blocks 23. The two mounting posts 19 are respectively fixed on both sides of the movable frame 2. The two pressing posts 20 slide through the two mounting posts 19. The two second springs 21 are respectively located inside the two mounting posts 19, and their two ends are respectively fixed to the inner wall of the mounting post 19 and the end of the pressing post 20. The connecting frame 3 has two through slots 24, and the several abutment blocks 22 are evenly arranged and fixed. Located within two through slots 24, two locking blocks 23 are respectively fixed on two pressing posts 20 and positioned between two adjacent abutment blocks 22. Under the thrust of the second spring 21, the pressing posts 20 and their locking blocks 23 are in a pop-out state. The locking blocks 23 are locked between two adjacent abutment blocks 22 within the through slots 24 of the connecting frame 3, preventing the connecting frame 3 from moving back and forth through mechanical interference. When the user simultaneously presses the left and right pressing posts 20, overcoming the force of the second spring 21, the locking blocks 23 move inward into the through slots 24, disengaging from the abutment blocks 22. At this time, the connecting frame 3 can slide freely back and forth. After adjusting to a suitable position, the pressing posts 20 are released. The second spring 21 pushes the pressing posts 20 and locking blocks 23 back to their original positions, and the locking blocks 23 automatically engage with the adjacent abutment blocks 22 at their current positions, achieving multi-position locking.

[0024] Working principle:

[0025] When the user needs to adjust the height of the headrest 4, press the pressing lever 9 to push the fixing lever 10 to move along the sliding groove 13. The inclined surface design of the sliding groove 13 converts the longitudinal movement into the opposing horizontal movement of the two locking blocks 8, causing them to retract from the first locking hole 11 of the mounting bracket 1 and releasing the vertical lock. At this time, the user can move the moving bracket 2 up and down to the desired height. After releasing the pressing lever 9, the first spring 16 pushes the fixing lever 10 back to its original position, causing the locking blocks 8 to pop out and insert into the new set of aligned first locking holes 11, completing the height lock. When the user needs to adjust the front and back position of the headrest 4, press the two pressing posts 20 simultaneously to overcome the second spring. The force of spring 21 causes locking block 23 to move inward toward through groove 24, disengaging from abutting block 22 on connecting frame 3. At this time, connecting frame 3 can slide back and forth. After adjustment, release pressing column 20. Second spring 21 pushes locking block 23 to reset and engage between adjacent abutting blocks 22, achieving lateral locking. Headrest 4 itself can rotate to adjust angle through hinge point with connecting frame 3. Second connecting rod 26 can slide within first connecting rod 25 and is supported by third spring 27. When head rests on headrest 4 and pressure is applied, spring can be compressed to provide cushioning. When head moves, headrest 4 can also produce a certain degree of adaptive floating.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An adjustable seat headrest, characterized in that, The device includes a mounting bracket (1) fixedly installed on the seat, a movable bracket (2) that slides vertically through the mounting bracket (1), a connecting bracket (3) that slides horizontally on the movable bracket (2), a headrest (4) that is rotatably provided at the end of the connecting bracket (3), a moving component for adjusting the vertical position of the movable bracket (2) being provided inside the movable bracket (2), and an adjusting component for adjusting the horizontal position of the connecting bracket (3) being provided on the movable bracket (2).

2. An adjustable seat headrest according to claim 1, characterized in that: The mounting frame (1) has a movable cavity (5), the movable frame (2) is slidably disposed in the movable cavity (5), the movable frame (2) has a mounting cavity (6), and the movable component is disposed in the mounting cavity (6).

3. An adjustable headrest according to claim 2, characterized in that: The movable component includes two guide rods (7), two snap-fit ​​blocks (8), a pressing rod (9), and a fixing rod (10). The two guide rods (7) are fixed on both sides of the inner wall of the mounting cavity (6). The two snap-fit ​​blocks (8) are slidably mounted on the two guide rods (7). The mounting frame (1) has several first snap-fit ​​holes (11) on both sides. The movable frame (2) has second snap-fit ​​holes (12) on both sides. The ends of the two snap-fit ​​blocks (8) can slide through two second snap-fit ​​blocks (8) and snap into two of the first snap-fit ​​holes (11) on the mounting frame (1). The pressing rod (9) slides through the movable frame (2) and extends into the mounting cavity (6). The fixing rod (10) is fixed on the end of the pressing rod (9). The two snap-fit ​​blocks (8) have sliding grooves (13). The fixing rod (10) slides through the two sliding grooves (13) in sequence.

4. An adjustable seat headrest according to claim 3, characterized in that: A fixing block (14) is fixed inside the mounting cavity (6). The pressing rod (9) slides through the fixing block (14). A limiting block (15) is fixed at the end of the pressing rod (9) away from the fixing rod (10). The limiting block (15) abuts against the inner wall of the mounting cavity (6). A first spring (16) is sleeved on the pressing rod (9). The two ends of the first spring (16) are fixedly connected to the limiting block (15) and the fixing block (14).

5. An adjustable headrest according to claim 1, characterized in that: The movable frame (2) is fixed with sliders (17) on both sides, and the inner wall of the connecting frame (3) is provided with grooves (18) on both sides. The two grooves (18) are slidably disposed on the two sliders (17).

6. An adjustable headrest according to claim 5, characterized in that: The adjustment assembly includes two hollow mounting posts (19), two pressing posts (20), two second springs (21), several abutment blocks (22), and two locking blocks (23). The two mounting posts (19) are fixed on both sides of the movable frame (2). The two pressing posts (20) slide through the two mounting posts (19). The two second springs (21) are located in the two mounting posts (19), and the two ends of the second springs (21) are fixed to the inner wall of the mounting post (19) and the end of the pressing post (20), respectively. The connecting frame (3) has two through slots (24). Several abutment blocks (22) are evenly arranged and fixed in the two through slots (24). The two locking blocks (23) are fixed on the two pressing posts (20) and located between the two adjacent abutment blocks (22).

7. An adjustable headrest according to claim 1, characterized in that: The connecting frame (3) is rotatably provided with a hollow first connecting rod (25), and a second connecting rod (26) is slidably provided inside the first connecting rod (25). The end of the second connecting rod (26) away from the first connecting rod (25) is rotatably connected to the headrest (4). A third spring (27) is provided inside the first connecting rod (25), and the two ends of the third spring (27) are respectively fixed to the inner wall of the first connecting rod (25) and the end of the second connecting rod (26).

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