An adjustment device for a seat back frame

Abstract

The utility model discloses a kind of adjusting device for seat back frame, it is related to seat technical field, comprising: connecting seat;Mobile seat, is arranged at one end of connecting seat;Adjusting seat, is arranged at one end of mobile seat;Rotary shaft, is arranged at one end of adjusting seat, and rotary shaft is matched with mobile seat;Rotary assembly, it is arranged at one side of mobile seat, and rotary assembly is matched with rotary shaft;Seat back frame body, it is arranged at the other end of connecting seat.The utility model can be adjusted to the position of the height of user cervical vertebra by pushing connecting seat, then insert rod is inserted into corresponding limit slot and limit hole to complete fixation, can accurately match physiological characteristics of user, avoid cervical vertebra compression or suspension due to height inadaptation, improve the fit and support stability of seat back frame.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, and more specifically, to an adjustment device for a seat back frame. Background Technology

[0002] As a crucial component of vehicles and furniture, seats directly impact the user's riding experience and health through their comfort and safety. Existing seat backrest adjustment mechanisms typically achieve overall backrest tilt adjustment via mechanical transmission or electric drive structures. Some vehicles further integrate lumbar support fore-aft and height adjustment functions to meet the basic seating needs of different users. However, most existing seat backrest adjustment mechanisms focus only on the overall backrest posture and lumbar support area, lacking sufficient consideration for specific adjustments to cervical spine support. As the highest support component in the human sitting posture, the physiological curvature of the cervical spine directly affects head posture stability, which is especially crucial for driving safety in vehicle use.

[0003] While existing technologies include headrests to improve neck support, their adjustment functions are mostly limited to minor adjustments in height or angle, resulting in a narrow range of adjustment and insufficient flexibility. This makes it difficult for headrests to fully adapt to the natural cervical spine curves of users of different heights and body types, and also fails to meet the dynamic support needs of the cervical spine in different sitting postures such as upright sitting and slightly reclining. Prolonged use may lead to neck muscle tension, soreness, and other discomfort, severely affecting the cervical spine's support effect.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes an adjustment device for a seat back frame to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows: An adjustment device for a seat back frame includes: a connecting seat; a movable seat disposed at one end of the connecting seat; an adjustment seat disposed at one end of the movable seat; a rotating shaft passing through one end of the adjustment seat and cooperating with the movable seat; a rotating component disposed on one side of the movable seat and cooperating with the rotating shaft; and a seat back frame body disposed at the other end of the connecting seat.

[0007] Furthermore, in order to achieve height adjustment and avoid cervical spine compression or unsupported position caused by height discomfort, and to improve the fit and support stability of the seat back frame, limit blocks are set on both sides of the connecting seat. Several limit grooves are opened on one side of the limit block, and a groove is opened at one end of the seat back frame body. Slide grooves that cooperate with the moving seat are opened on both sides of the groove. Several limit holes are opened on one side of the slide groove. The limit grooves and limit holes are fixed by insert rods.

[0008] Furthermore, to ensure the stability of the adjustable seat angle and improve the comfort of the cervical spine fitting the adjustable seat, the rotating assembly includes a first rotating handle located on one side of the movable seat, and the first rotating handle is connected to the rotating shaft. The rotating assembly also includes a fixing groove located inside the other side of the adjustable seat, with a ratchet that cooperates with the rotating shaft inside the fixing groove. A rotating rod is located at the other end of the fixing groove, and a rotating block is located on the outer circumference of the rotating rod. Springs are located on both sides of the fixing groove, with a lever at one end of each spring. One end of the lever cooperates with the ratchet, and the other end of the lever cooperates with the rotating block. The rotating assembly also includes a second rotating handle located on the other side of the movable seat, and the second rotating handle cooperates with the rotating rod.

[0009] The beneficial effects of this utility model are as follows: 1. This utility model can be adjusted to a position that matches the user's cervical spine height by pushing the connecting seat, and then the plug is inserted into the corresponding limiting groove and limiting hole to complete the fixation. It can accurately match the user's physiological characteristics, avoid cervical spine compression or suspension caused by unsuitable height, and improve the fit and support stability of the seat back frame.

[0010] 2. This utility model, through the rotating component, can realize bidirectional adjustment and locking of the adjustment seat, which not only ensures the stability of the adjustment seat angle and prevents accidental rotation during use, but also makes it easy to operate and controllable in direction, adapting to the cervical spine angle needs of users in different sitting postures, and further improving the comfort of the fit between the cervical spine and the adjustment seat. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of an adjustment device for a seat back frame according to an embodiment of the present utility model; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3This is a partial structural schematic diagram of an adjustment device for a seat back frame according to an embodiment of the present utility model; Figure 4 This is one of the cross-sectional views of an adjustment device for a seat back frame according to an embodiment of the present utility model; Figure 5 yes Figure 4 A magnified view of a section at point B in the middle; Figure 6 This is a second cross-sectional view of an adjustment device for a seat back frame according to an embodiment of the present utility model; Figure 7 This is a second partial structural schematic diagram of an adjustment device for a seat back frame according to an embodiment of the present utility model.

[0013] In the picture: 1. Connecting seat; 2. Moving seat; 3. Adjusting seat; 4. Rotating shaft; 5. Rotating assembly; 501. First rotating handle; 502. Fixing groove; 503. Ratchet; 504. Rotating rod; 505. Rotating block; 506. Spring; 507. Toggle lever; 508. Second rotating handle; 6. Seat back frame body; 7. Limiting block; 8. Limiting groove; 9. Groove; 10. Slide groove; 11. Limiting hole; 12. Insert rod. Detailed Implementation

[0014] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0015] According to an embodiment of the present invention, an adjustment device for a seat back frame is provided.

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-7 As shown, the adjustment device for a seat back frame according to an embodiment of the present invention includes: a connecting seat 1; a movable seat 2 disposed at one end of the connecting seat 1; an adjusting seat 3 disposed at one end of the movable seat 2; a rotating shaft 4 disposed through one end of the adjusting seat 3 and cooperating with the movable seat 2; a rotating component 5 disposed on one side of the movable seat 2 and cooperating with the rotating shaft 4; and a seat back frame body 6 disposed at the other end of the connecting seat 1.

[0017] In one embodiment, for the connecting seat 1, limiting blocks 7 are provided on both sides of the connecting seat 1. Several limiting grooves 8 are provided on one side of the limiting block 7. A groove 9 is provided at one end of the seat back frame body 6. Slide grooves 10 that cooperate with the movable seat 2 are provided on both sides of the groove 9. Several limiting holes 11 are provided on one side of the slide groove 10. The limiting grooves 8 and the limiting holes 11 are fixed by the insert rod 12, thereby realizing height adjustment, avoiding cervical spine compression or suspension caused by height discomfort, and improving the fit and support stability of the seat back frame.

[0018] In one embodiment, the rotating assembly 5 includes a first rotating handle 501 disposed on one side of the movable seat 2, and the first rotating handle 501 is connected to the rotating shaft 4. The rotating assembly 5 also includes a fixing groove 502 formed inside the other side of the adjusting seat 3. A ratchet 503 that cooperates with the rotating shaft 4 is disposed inside the fixing groove 502. A rotating rod 504 is disposed at the other end of the fixing groove 502. A rotating block 505 is disposed on the outer circumference of the rotating rod 504. Springs 506 are disposed on both sides of the fixing groove 502. A lever 507 is disposed at one end of the spring 506. One end of the lever 507 cooperates with the ratchet 503. The other end of the lever 507 cooperates with the rotating block 505. The rotating assembly 5 also includes a second rotating handle 508 disposed on the other side of the movable seat 2. The second rotating handle 508 cooperates with the rotating rod 504, thereby ensuring the stability of the angle of the adjusting seat 3 and improving the comfort of the cervical spine and the adjusting seat.

[0019] The working principle of the rotating assembly 5 is as follows: When the second rotating handle 508 is not rotated, the rotating rod 504 and the rotating block 505 on the outer side of the circumference remain stationary. The two sets of springs 506 on both sides of the fixed groove 502 push the corresponding levers 507 due to their own elastic force, so that one end of each set of levers 507 is tightly engaged with the tooth groove of the ratchet 503, and together they form a bidirectional lock on the ratchet 503, preventing the ratchet 503 from rotating in any direction. Then, the ratchet 503 and the rotating shaft 4 are engaged to restrict the rotation of the rotating shaft 4, thereby fixing the position of the adjusting seat 3.

[0020] When an angle adjustment is required in a certain direction, the second rotating handle 508 is rotated. The second rotating handle 508 drives the rotating rod 504 and the rotating block 505 to rotate in the corresponding direction, causing a set of levers 507 to move away from the ratchet 503 against the elastic force of the spring 506, disengaging from the ratchet 503. Meanwhile, another set of levers 507 remains engaged with the ratchet 503 under the action of the spring 506. At this time, rotating the first rotating handle 501 connected to the rotating shaft 4 allows the ratchet 503 to rotate synchronously with the rotating shaft 4 in the unlocked direction, thus achieving angle adjustment in that direction.

[0021] If adjustment in the opposite direction is required, rotate the second rotating handle 508 in the opposite direction. The rotating block 505 will then rotate in the opposite direction, which will push another set of levers 507 to disengage from the ratchet 503. The levers 507 that were originally pushed will reset under the action of the spring 506 and engage with the ratchet 503. Then, the first rotating handle 501 can drive the rotating shaft 4 and the ratchet 503 to rotate in the opposite direction, thereby realizing the angle adjustment of the adjusting seat 3 in the opposite direction. After the adjustment is completed, release the second rotating handle 508, the rotating block 505 will reset, and both sets of levers 507 will re-engage with the teeth of the ratchet 503 under the action of the spring 506, forming a bidirectional lock again, ensuring that the adjusting seat 3 is stable in the adjusted position.

[0022] It should be noted that the end of the adjustment seat 3 away from the movable seat 2 can be wrapped with a breathable and skin-friendly fabric to cover the elastic substrate (such as memory foam, high-resilience sponge, etc.), or the substrate can be made of high-strength and tough plastic or metal, which can both ensure support stability and conform to the cervical spine curve.

[0023] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0024] In practical applications, when a user sits on the seat back frame 6, they can push the connecting seat 1 according to their cervical spine height requirements. The connecting seat 1 will cause the limiting block 7 to slide along the slide groove 10, thereby adjusting the relative height between the connecting seat 1 and the movable seat 2. After sliding to a suitable height for the cervical spine, the insert rod 12 is inserted into the corresponding limiting groove 8 and limiting hole 11. The limiting action of the insert rod 12 fixes the height of the connecting seat 1 and the movable seat 2, completing the height adjustment. After the height is fixed, the angle of the adjusting seat 3 is rotated by operating the rotating component 5 (the working principle of the rotating component 5 is as described above), thereby adjusting the fitting angle between the adjusting seat 3 and the user's cervical spine. Finally, through the coordinated adjustment of height and angle, the adjusting device adapts to the user's cervical spine condition, improving user comfort.

[0025] In summary, by utilizing the above-mentioned technical solution of this utility model, the connecting seat 1 can be adjusted to a position suitable for the user's cervical spine height by pushing it. Then, the insert rod 12 is inserted into the corresponding limiting groove 8 and limiting hole 11 to complete the fixation. This accurately matches the user's physiological characteristics, avoiding cervical spine compression or suspension due to height discomfort, and improving the fit and support stability of the seat back frame. The rotating component 5 enables bidirectional adjustment and locking of the adjusting seat 3, ensuring not only the stability of the adjusting seat 3's angle and preventing accidental rotation during use, but also convenient operation and controllable direction. It can adapt to the user's cervical spine angle requirements under different sitting postures, further improving the comfort of the fit between the cervical spine and the adjusting seat.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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. An adjustment device for a seat back frame, characterized in that, include: Connector (1); A movable base (2) is disposed at one end of the connecting base (1); An adjusting seat (3) is disposed at one end of the movable seat (2); A rotating shaft (4) is disposed through one end of the adjusting seat (3), and the rotating shaft (4) cooperates with the moving seat (2); A rotating assembly (5) is disposed on one side of the movable seat (2), and the rotating assembly (5) cooperates with the rotating shaft (4); The seat back frame body (6) is located at the other end of the connecting seat (1).

2. The adjustment device for a seat back frame according to claim 1, characterized in that, Limiting blocks (7) are provided on both sides of the connecting seat (1), and several limiting grooves (8) are provided on one side of the limiting block (7).

3. The adjustment device for a seat back frame according to claim 2, characterized in that, The seat back frame body (6) has a groove (9) at one end, and a sliding groove (10) that cooperates with the movable seat (2) is provided on both sides of the groove (9). A plurality of limiting holes (11) are provided on one side of the sliding groove (10).

4. The adjustment device for a seat back frame according to claim 3, characterized in that, The limiting groove (8) and the limiting hole (11) are fixed together by a plug rod (12).

5. The adjustment device for a seat back frame according to claim 1, characterized in that, The rotating assembly (5) includes a first rotating handle (501) disposed on one side of the movable seat (2), and the first rotating handle (501) is connected to the rotating shaft (4).

6. The adjustment device for a seat back frame according to claim 5, characterized in that, The rotating assembly (5) also includes a fixing groove (502) opened inside the other side of the adjusting seat (3). A ratchet (503) that cooperates with the rotating shaft (4) is provided inside the fixing groove (502). A rotating rod (504) is provided at the other end of the fixing groove (502). A rotating block (505) is provided on the outer circumference of the rotating rod (504). Springs (506) are provided on both sides of the fixing groove (502). A lever (507) is provided at one end of the spring (506), and one end of the lever (507) cooperates with the ratchet (503), while the other end of the lever (507) cooperates with the rotating block (505).

7. An adjustment device for a seat back frame according to claim 6, characterized in that, The rotating assembly (5) further includes a second rotating handle (508) disposed on the other side of the movable seat (2), and the second rotating handle (508) cooperates with the rotating rod (504).

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