Headrest overturning structure

Abstract

The utility model discloses a headrest overturning structure which comprises an unlocking hook, the unlocking hook is connected with one end of a first rotating shaft, the other end of the first rotating shaft penetrates through a right side support, a tail hook and a first torsion spring to be connected with a left side support, one end of the first torsion spring is connected with the left side support, and the other end of the first torsion spring is connected with the tail hook. The tail hook is matched with one end of a locking hook, the locking hook is rotationally connected to the side support through a second rotating shaft, the other end of the locking hook is matched with a toothed plate, a buffer cap is arranged on the portion, below the toothed plate, of the right side support, the toothed plate is fixedly connected to a rotating rod, the rotating rod is sleeved with a second torsional spring, and the second torsional spring is fixedly connected to the right side support. One end of the second torsion spring is connected with the toothed plate, the other end of the second torsion spring is connected with the left side support, and a damping ring is arranged at the position, opposite to the rotating rod, of the left side support. The turnover mechanism is simple in structure, not prone to shaking in the turnover process and better in unlocking stability performance, the problem of noise is solved, and user experience is improved.

Description

Technical Field

[0001] This utility model belongs to the field of headrests, specifically relating to a headrest flipping structure. Background Technology

[0002] Headrests are car seat accessories that effectively protect the head and neck of drivers and passengers during driving, especially in the event of emergency braking or an accident, preventing injuries caused by sudden deceleration or acceleration. They also provide a comfortable head support point for drivers during long drives. Due to limited space inside cars, folding headrests were developed to expand rear storage space and prevent interference between rear seat headrests and front seats when folded down.

[0003] The folding headrest includes an unlocking cord located inside the headrest rod and the headrest, an unlocking structure connected to the unlocking cord, and a flipping structure that cooperates with the unlocking structure. By pulling the unlocking cord, the unlocking structure is moved, which in turn causes the flipping structure to flip, thereby completing the unlocking and locking action of the headrest rod. However, the existing flipping structure has wobbling during the flipping process, poor unlocking stability, and noise. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by providing a novel headrest flipping structure. This flipping structure is not easy to shake during the flipping process, has better unlocking stability, solves the noise problem, and improves the user experience.

[0005] To achieve the above objectives, this utility model provides a headrest flipping structure, including an unlocking hook. The unlocking hook is connected to one end of a first rotating shaft. The other end of the first rotating shaft passes through a right-side bracket, a tail hook, a first torsion spring, and a left-side bracket. One end of the first torsion spring is connected to the left-side bracket, and the other end is connected to the tail hook. The tail hook engages with one end of a locking hook. The locking hook is rotatably connected to the side bracket via a second rotating shaft. The other end of the locking hook engages with a toothed plate. A buffer cap is provided on the right-side bracket below the toothed plate. The toothed plate is fixed to a rotating rod. A second torsion spring is sleeved on the rotating rod. One end of the second torsion spring is connected to the toothed plate, and the other end is connected to the left-side bracket. A damping ring is provided on the left-side bracket relative to the rotating rod.

[0006] As a further optimization, the first rotating shaft has a stepped structure, wherein the stepped surface corresponding to the tail hook has a first anti-rotation surface, the inner wall of the through hole of the tail hook has a second anti-rotation surface that cooperates with the first anti-rotation surface, and the first rotating shaft between the tail hook and the right side bracket is provided with a first nylon bushing.

[0007] As a further optimization, the tail hook has a first toothed surface protruding towards the locking hook on the side opposite to the locking hook, and a guide surface protruding towards the left support on the side perpendicular to the first toothed surface, and the guide surface has a guide groove that cooperates with the locking hook.

[0008] As a further optimization, the locking hook is hook-shaped, and the side of the locking hook opposite the tail hook is a second toothed surface that cooperates with the tail hook. The hook tail of the second toothed surface has a guide post that cooperates with the tail hook, and the hook head of the locking hook has multiple first teeth that cooperate with the toothed plate.

[0009] As a further optimization, the toothed plate has multiple second teeth in the middle of the side that cooperates with the locking hook, the front of which is an outwardly extending limiting surface, and the tail of which is an outwardly extending locking hook.

[0010] As a further optimization, a second nylon bushing is provided on the rotating rod between the toothed plate and the right-side bracket.

[0011] Advantages and beneficial effects of this utility model

[0012] 1. This utility model uses an unlocking hook to drive a tail hook to rotate. The tail hook, through a first toothed surface and a guide groove, drives a locking hook to rotate. When the locking hook rotates to disengage from the teeth of the toothed plate, the structure unlocks. Because a second torsion spring connects the toothed plate and the left-side bracket, the flipping structure flips around the rotating rod under the drive of the second torsion spring, causing the headrest to fold forward. Since multiple toothed surfaces mesh between the locking hook and the toothed plate, the meshing degree is higher, resulting in better locking stability. Simultaneously, when the headrest experiences a large impact, the impact force is distributed across multiple toothed surfaces, reducing the impact force borne by each toothed surface. This lowers the strength requirements for the locking hook and toothed plate materials, greatly facilitating material selection and improving impact resistance with the same materials.

[0013] 2. This utility model adds a damping ring at the position of the left support relative to the rotating rod. The damping generated when the left support rotates balances the elastic force of the second torsion spring, reduces the shaking after the headrest flips, increases stability, and improves the user's operating comfort. At the same time, it also acts as a lateral limit, which can improve the stability of the flipping mechanism.

[0014] 3. The present invention provides a buffer cap at the position of the right bracket relative to the toothed plate. The buffer cap can prevent the right bracket from directly colliding with the limiting surface of the toothed plate when the headrest is flipped after the locking hook is unlocked from the toothed plate, thereby further reducing noise and improving the user experience.

[0015] 4. This utility model adds a first damping bushing between the tail hook and the right side bracket, and a second damping bushing between the toothed plate and the right side bracket. The first damping bushing can prevent the tail hook from rubbing against the right side bracket during rotation and generating noise, and the second damping bushing can prevent the right side bracket from rubbing against the toothed plate during rotation and generating noise. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure provided in the embodiment of this utility model;

[0018] Figure 2 This is an exploded view of the overall structure provided in the embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the present invention after removing the right-side bracket;

[0020] Figure 4 This is a schematic diagram showing the cooperation between the embodiment of this utility model and the unlocking structure;

[0021] Figure 5 This is a schematic diagram of the locking posture of the flipping structure in an embodiment of this utility model;

[0022] Figure 6 This is a schematic diagram of the unlocked state of the flip structure in an embodiment of this utility model.

[0023] Reference numerals in the attached drawings: 1. Unlocking hook; 2. First rotating shaft; 2-1. First anti-rotation surface; 3. Right side bracket; 4. Tail hook; 4-1. Second anti-rotation surface; 4-2. First toothed surface; 4-3. Guide groove; 5. First torsion spring; 6. Left side bracket; 7. Locking hook; 7. Second toothed surface; 7-1. Guide post; 7-2. First tooth; 7-3. Second rotating shaft; 8. Toothed plate; 9. Second tooth; 9-1. Limiting surface; 9-2. Locking hook; 9-3. Rotating rod; 10. Second torsion spring; 11. First nylon bushing; 12. Second nylon bushing; 13. Buffer cap; 14. Damping ring; 15. Unlocking structure; 16. Pin; 17. Unlocking pull rope; 18. Flipping structure; 19. Detailed Implementation

[0024] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0025] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0026] like Figures 1-4 As shown, a headrest flipping structure includes an unlocking hook 1 that cooperates with an unlocking structure 16. The flipping structure unlocks by rotating the unlocking hook 1 through the unlocking structure 16. The unlocking hook 1 is fixedly connected to the right end of a first rotating shaft 2. The left end of the first rotating shaft 2 passes through a right side bracket 3, a tail hook 4, and a first torsion spring 5 in sequence and is connected to a left side bracket 6. One end of the first torsion spring 5 is connected to the left side bracket 6, and the other end is connected to the tail hook 4. The first torsion spring 5 is used to help the unlocking hook 1 quickly reset. The tail hook 4 cooperates with one end of a locking hook 7. The locking hook 7 is rotatably connected between the right side bracket 3 and the left side bracket 6 through a second rotating shaft 8. The other end of the locking hook 7... One end engages with the toothed plate 9, and the locking hook 7 engages and disengages with the toothed plate 9 to lock or unlock the flipping structure. The toothed plate 9 is fixed to the rotating rod 10, and a second torsion spring 11 is sleeved on the rotating rod 10. One end of the second torsion spring 11 is connected to the toothed plate 9, and the other end is connected to the left support 6, which is used to drive the flipping structure to flip quickly. The left support 6 is provided with a damping ring 15 at the position relative to the rotating rod 10. The damping ring 15 can balance the elastic force of the second torsion spring 11, reduce the shaking after the headrest flips, and increase stability. The right support 3 and the left support 6 are welded and fixed at the top, and the right support 3 and the left support 6 are connected at the bottom by a pin 17.

[0027] As a further optimization, the first rotating shaft 2 has a stepped structure for mounting the unlocking hook 1, the right side bracket 3, the tail hook 4, the first torsion spring 5, and the left side bracket 6. The stepped surface corresponding to the tail hook 4 has a first anti-rotation surface 2-1, and the inner wall of the through hole of the tail hook 4 has a second anti-rotation surface 4-1 that cooperates with the first anti-rotation surface 2-1. The tail hook 4 is fixed by the two anti-rotation surfaces through the first rotating shaft 2. The first rotating shaft 2 between the tail hook 4 and the right side bracket 3 is provided with a first nylon bushing 12. The first nylon bushing 12 can prevent the tail hook 4 from directly rubbing against the right side bracket 3 and generating noise when rotating, and at the same time, it limits the lateral movement of the tail hook 4 by cooperating with the stepped structure.

[0028] As a further optimization, the tail hook 4 has a first toothed surface 4-2 protruding towards the locking hook 7 on one side relative to the locking hook 7. Below the first toothed surface 4-2 is a guide surface, and the guide surface has a guide groove 4-3. The guide groove 4-3 cooperates with the guide post 7-2 on the locking hook 7. During the unlocking and locking process, the guide groove 4-3 on the tail hook 4 pulls the guide post 7-2 on the locking hook 7 to move, thereby driving the locking hook 7 to rotate around the second rotating shaft 8.

[0029] As a further optimization, the locking hook 7 is hook-shaped, and the side of the locking hook 7 opposite to the tail hook 4 is a second tooth surface 7-1 that mates with the first tooth surface 4-2 on the tail hook 4. The hook tail of the second tooth surface 7-1 has a guide post 7-2 that mates with the tail hook 4, and the hook head of the locking hook 7 has three first teeth 7-3 that mate with the toothed plate 9.

[0030] As a further optimization, the toothed plate 9 has three second teeth 9-1 that mesh with the locking hook 7 on the middle of one side. Its front part is an outwardly extending limiting surface 9-2. When the flipping structure is unlocked, the front end of the right bracket 3 contacts the limiting surface 9-2 at the front of the toothed plate 9, which limits the flipping angle of the flipping structure. In order to prevent the front end of the right bracket 3 from directly contacting and colliding with the limiting surface 9-2 during flipping and generating noise, this embodiment provides a buffer cap 14 on the front end of the right bracket 3. The tail of the toothed plate 9 is an outwardly extending locking hook 9-3. When the flipping mechanism is in the unlocked state, if the unlocking hook 1 is reset, the locking hook 9-3 can prevent the locking tooth 7 from rotating and causing self-locking with the toothed plate 9.

[0031] As a further optimization, a second nylon bushing 13 is provided on the rotating rod 10 between the toothed plate 9 and the right side bracket 3. The second nylon bushing 13 can prevent the right side bracket 3 from directly rubbing against the toothed plate 9 and generating noise when rotating.

[0032] Unlocking process

[0033] like Figures 4-6As shown, first, press the button. The button is connected to the motor via a wire, causing the motor to run. The motor's operation drives the unlocking pull rope 18 downward. The downward movement of the unlocking pull rope 18 causes the unlocking structure 16 to slide upward. The upward sliding of the unlocking structure 16 causes the unlocking hook 1 on the flipping structure 19 to rotate upward. The rotation of the unlocking hook 1 causes the tail hook 4 on the first rotating shaft 2 to rotate. The tail hook 4 rotates downward and pulls the guide post 7-2 at the tail of the locking hook 7 downward through the limiting groove 4-3. The locking hook 7 rotates around the second rotating shaft 8, causing the head of the locking hook 7 to move upward, thereby separating from the toothed plate 9 from the engagement state and releasing the locking relationship. The folding headrest folds forward under the action of the second torsion spring 11 (as shown). Figure 6 (As shown).

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the present utility model.

Claims

1. A headrest flipping structure, characterized in that: The system includes an unlocking hook (1), which is connected to one end of a first rotating shaft (2). The other end of the first rotating shaft (2) passes through a right-side bracket (3), a tail hook (4), a first torsion spring (5), and a left-side bracket (6). One end of the first torsion spring (5) is connected to the left-side bracket (6), and the other end is connected to the tail hook (4). The tail hook (4) engages with one end of a locking hook (7), which is rotatably connected to the side bracket via a second rotating shaft (8). Above, the other end of the locking hook (7) is engaged with the toothed plate (9). A buffer cap (14) is provided on the right side bracket (3) below the toothed plate (9). The toothed plate (9) is fixedly connected to the rotating rod (10). A second torsion spring (11) is sleeved on the rotating rod (10). One end of the second torsion spring (11) is connected to the toothed plate (9), and the other end is connected to the left side bracket (6). A damping ring (15) is provided on the left side bracket (6) relative to the rotating rod (10).

2. The headrest flipping structure according to claim 1, characterized in that: The first rotating shaft (2) has a stepped structure, wherein the stepped surface corresponding to the tail hook (4) has a first anti-rotation surface (2-1), and the inner wall of the through hole of the tail hook (4) has a second anti-rotation surface (4-1) that cooperates with the first anti-rotation surface (2-1). The first rotating shaft (2) between the tail hook (4) and the right side bracket (3) is provided with a first nylon bushing (12).

3. The headrest flipping structure according to claim 1, characterized in that: The tail hook (4) has a first tooth surface (4-2) protruding towards the locking hook (7) on one side relative to the locking hook (7), and a guide surface protruding towards the left support (6) on the side perpendicular to the first tooth surface (4-2), and a guide groove (4-3) that cooperates with the locking hook (7) on the guide surface.

4. The headrest flipping structure according to claim 1, characterized in that: The locking hook (7) is hook-shaped. The side of the locking hook (7) opposite to the tail hook (4) is a second tooth surface (7-1) that cooperates with the tail hook (4). The hook tail of the second tooth surface (7-1) has a guide post (7-2) that cooperates with the tail hook (4). The hook head of the locking hook (7) has multiple first teeth (7-3) that cooperate with the toothed plate (9).

5. A headrest flipping structure according to claim 1, characterized in that: The toothed plate (9) has multiple second teeth (9-1) that mesh with the locking hook (7) on the middle of one side. Its front part is an outwardly extending limiting surface (9-2), and its tail part is an outwardly extending locking hook (9-3).

6. The headrest flipping structure according to claim 1, characterized in that: A second nylon bushing (13) is provided on the rotating rod (10) between the toothed plate (9) and the right-side bracket (3).

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