Electric drive folding and resetting headrest

Abstract

The utility model discloses a kind of electric drive folding and reset headrest, it is related to the technical field of automobile seat, including folding mechanism assembly, the headrest framework connected with folding mechanism assembly, the unlocking mechanism and reset mechanism being set on the headrest framework, unlocking mechanism includes unlocking slider, unlocking pull line, unlocking slider is set on the headrest framework, one end of unlocking pull line is connected with motor, the other end is connected with unlocking slider, unlocking slider is connected with folding mechanism assembly, reset mechanism includes fixed pulley, reset pull line, fixed pulley is set on the headrest framework, reset pull line is set around fixed pulley, one end of reset pull line is connected with motor, the other end is connected with headrest framework;The utility model can realize headrest electric folding and reset integration function using single motor, with compact structure, low in cost, light in weight, force transmission efficiency is high, arrangement flexible and other advantages, significantly improve the operation convenience and the science and technology of whole car.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to an electrically driven folding and resetting headrest. Background Technology

[0002] Rear seat headrests in cars often need to be foldable to improve rear visibility or facilitate seat folding. Existing technologies include several manual and electric headrest folding solutions. Electric folding solutions typically use a motor to drive the headrest folding, but existing electric folding mechanisms are often complex, potentially requiring multiple motors to control unlocking and resetting actions. This results in high cost, weight, and space occupation, as well as efficiency losses during force transmission, high motor power requirements, and potential noise issues.

[0003] Therefore, a more simplified, more efficient, and cost-effective electric headrest folding solution is needed. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a headrest with a compact structure, efficient force transmission, and the ability to achieve electric folding and resetting functions using a single motor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An electrically driven folding and resetting headrest includes a folding mechanism assembly, a headrest frame connected to the folding mechanism assembly, an unlocking mechanism, and a resetting mechanism disposed on the headrest frame. The unlocking mechanism includes an unlocking slider and an unlocking cable. The unlocking slider is disposed on the headrest frame, and one end of the unlocking cable is connected to a motor, while the other end is connected to the unlocking slider. The unlocking slider is connected to the folding mechanism assembly. The resetting mechanism includes a fixed pulley and a resetting cable. The fixed pulley is disposed on the headrest frame, and the resetting cable passes around the fixed pulley. One end of the resetting cable is connected to a motor, and the other end is connected to the headrest frame.

[0007] As a preferred embodiment of this utility model, the headrest frame is connected to a filling sponge, a headrest foam, a skin assembly, and a headrest back shell.

[0008] As a preferred embodiment of this invention, when the reset cable is under tension, the angle between the direction of the tension applied to the headrest frame and the direction of the reset force required for the headrest to reset is 80° to 100°.

[0009] As a preferred embodiment of this invention, the included angle is 90°.

[0010] As a preferred embodiment of this invention, a reset spring is provided between the two sides of the unlocking slider and the headrest frame.

[0011] As a preferred embodiment of this invention, an auxiliary spring is fitted onto the unlocking pull line at the top of the unlocking slider.

[0012] As a preferred embodiment of this invention, the folding mechanism assembly is connected to the headrest frame via a pressure cap.

[0013] As a preferred embodiment of this utility model, the folding mechanism assembly includes headrest rods, and a connecting rod is provided between the two headrest rods.

[0014] As a preferred embodiment of this utility model, the folding mechanism assembly includes a latch, a connecting shaft, a trigger, a reset torsion spring, an unlocking lock cylinder, a locking element, an unlocking torsion spring, and a protective shell. The latch is rotatably connected to the unlocking slider, and the latch is fixedly connected to one end of the connecting shaft. The connecting shaft is provided with a trigger and a reset torsion spring. The other end of the trigger contacts one end of the unlocking lock cylinder. The unlocking lock cylinder is rotatably connected to the protective shell via a shaft, and the other end of the unlocking lock cylinder contacts the locking element. The locking element is fixedly connected to the connecting rod, and an unlocking torsion spring is sleeved on the connecting rod between the locking element and the protective shell.

[0015] As a preferred embodiment of this invention, the lower part of the unlocking slider is provided with an unlocking groove, and the locking tongue rotates within the unlocking groove.

[0016] By adopting the above technical solution, the beneficial effects of this utility model compared with the prior art are:

[0017] 1. The electric folding and resetting headrest of this utility model has high integration and cost advantages: It innovatively adopts a single dual actuator motor to simultaneously drive the unlocking and resetting actions, realizing the integration of electric folding and resetting functions of the headrest. Compared with the solution using dual motors, it greatly simplifies the structure, reduces cost and weight, and saves layout space.

[0018] 2. The electric drive folding and resetting headrest of this utility model has efficient force transmission: by introducing a fixed pulley and optimizing its arrangement, the tension direction of the resetting pull cable can be adjusted to an angle of 90° with the resetting force direction. According to the Pythagorean theorem, the tension is equal to the resetting force. At this time, the tension can be efficiently converted into the resetting force, which significantly reduces the loss in the force transmission process. This means that a motor with a smaller output force can be used, which helps to reduce system noise and energy consumption.

[0019] 3. The electric folding and resetting headrest of this utility model has improved performance: it realizes the complete functions of electric folding and electric resetting of the headrest, which is convenient to operate and enhances the technological feel and quality of the whole vehicle. This solution is the first of its kind in the industry and has obvious competitive advantages.

[0020] 4. The electrically driven folding and resetting headrest of this utility model has high reliability: the structure is compact and reasonable, and the force transmission path is clear, which helps to improve the reliability and service life of the headrest. Attached Figure Description

[0021] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0022] Figure 1 This is a perspective view of an application example of this utility model;

[0023] Figure 2 This is an exploded view of an application example of this utility model;

[0024] Figure 3 This is a front view of an application example of this utility model;

[0025] Figure 4 yes Figure 3 Sectional view along the AA direction;

[0026] Figure 5 This is a perspective view of the folding mechanism assembly, an application example of this utility model;

[0027] The reference numerals in the accompanying drawings include: 1. Folding mechanism assembly; 2. Headrest frame; 3. Unlocking mechanism; 4. Reset mechanism; 5. Filling sponge; 6. Headrest foam; 7. Skin assembly; 8. Headrest back shell; 11. Headrest rod; 111. Connecting rod; 12. Locking tongue; 13. Connecting shaft; 14. Trigger; 15. Reset torsion spring; 16. Unlocking lock cylinder; 17. Locking element; 18. Unlocking torsion spring; 19. Protective shell; 21. Pressure cover; 31. Unlocking slider; 311. Unlocking slide groove; 32. Unlocking pull cable; 33. Reset tension spring; 34. Auxiliary spring; 41. Fixed pulley; 42. Reset pull cable. Detailed Implementation

[0028] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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 of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. It should be pointed out that all accompanying drawings are exemplary representations. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0032] Reference Figures 1 to 5 , Figure 1 This is a perspective view of an application example of this utility model. Figure 2 This is an exploded view of an application example of this utility model. Figure 3 This is the front view of an application example of this utility model. Figure 4 yes Figure 3 Sectional view along the AA direction. Figure 5 This is a perspective view of the folding mechanism assembly, an application example of this utility model. This utility model provides an electrically driven folding and resetting headrest, including a folding mechanism assembly 1, a headrest frame 2, an unlocking mechanism 3, a resetting mechanism 4, a filling sponge 5, a headrest foam 6, a skin assembly 7, and a headrest back shell 8. The headrest frame 2 is connected to the folding mechanism assembly 1, which is used to position the headrest during folding and resetting. The unlocking mechanism 3 and the resetting mechanism 4 are mounted on the headrest frame 2. The unlocking mechanism 3 is connected to the folding mechanism assembly 1, unlocking the folding mechanism assembly 1 to allow the headrest to flip forward. The resetting mechanism 4 is used to reset the headrest. After resetting, the headrest is positioned by the folding mechanism assembly 1, keeping it in a vertical state. The filling sponge 5, headrest foam 6, skin assembly 7, and headrest back shell 8 cover the headrest frame 2 to form an integrated headrest.

[0033] In one specific embodiment, the folding mechanism assembly 1 includes a headrest rod 11, a locking tongue 12, a connecting shaft 13, a trigger 14, a return torsion spring 15, an unlocking lock cylinder 16, a locking element 17, an unlocking torsion spring 18, and a protective shell 19. The folding mechanism assembly 1 is connected to the headrest frame 2 via a pressure cover 21. A connecting rod 111 is provided between the two headrest rods 11, and a protective shell 19 is fitted on the connecting rod 111. The protective shell 19 is fixedly connected to the headrest frame 2. The locking tongue 12 is rotatably connected to the unlocking slider 31. More specifically, the lower part of the unlocking slider 31 preferably has an unlocking groove 311, and the locking tongue 12 rotates within the unlocking groove 311. The locking tongue 12 is fixedly connected to one end of the connecting shaft 13. The connecting shaft 13 is provided with a trigger 14 and a return torsion spring 15. The other end of the connecting shaft 13... One end passes sequentially through one side wall of the protective shell 19, the trigger 14, and the return torsion spring 15, and is rotatably connected to the other side wall of the protective shell 19. One end of the return torsion spring 15 is stuck in the arc-shaped groove of the trigger 14, and the other end is stuck in the side wall of the protective shell 19. One end of the trigger 14 is fixedly connected to the connecting shaft 13, and the other end of the trigger 14 is in contact with one end of the unlocking lock cylinder 16. The unlocking lock cylinder 16 is rotatably connected to the protective shell 19 via a shaft. The other end of the unlocking lock cylinder 16 is in contact with the locking member 17. The locking member 17 is fixedly connected to the connecting rod 111. An unlocking torsion spring 18 is sleeved on the connecting rod 111 between the locking member 17 and the protective shell 19. One end of the unlocking torsion spring 18 is stuck in the side wall of the protective shell 19, and the other end of the unlocking torsion spring 18 is stuck in the locking member 17.

[0034] In one specific embodiment, the unlocking mechanism 3 includes an unlocking slider 31 and an unlocking cable 32. The unlocking slider 31 is disposed on the headrest frame 2. One end of the unlocking cable 32 is connected to a motor (not shown), and the other end is connected to the unlocking slider 31. The unlocking slider 31 is connected to the folding mechanism assembly 1. A reset spring 33 is provided between the two sides of the unlocking slider 31 and the headrest frame 2. The reset spring 33 helps the unlocking slider 31 to reset. An auxiliary spring 34 is sleeved on the unlocking cable 32 at the top of the unlocking slider 31. The auxiliary spring 34 is used to assist the reset spring 33 in making the unlocking slider 31 reset quickly.

[0035] In one specific embodiment, the reset mechanism 4 includes a fixed pulley 41 and a reset cable 42. The fixed pulley 41 is disposed on the headrest frame 2, and the reset cable 42 is disposed around the fixed pulley 41. One end of the reset cable 42 is connected to the motor, and the other end is connected to the headrest frame 2. When the reset cable 42 is pulled, it will pull up the headrest frame 2 to reset the headrest and make it vertical. When the motor pulls up the reset cable 42, the angle between the direction of the pulling force applied to the headrest frame 2 and the direction of the reset force required for the headrest to reset is 80° to 100°. Such an angle can effectively transmit the force value. In a preferred embodiment, the angle is 90°, that is, the pulling force and the reset force form a 90° angle. According to the Pythagorean theorem, the pulling force is equal to the reset force, which transmits the force value most efficiently, thereby reducing the motor output pulling force and reducing the requirements for the motor output force.

[0036] The following will refer to Figures 1 to 5 The working principle of this utility model will be explained.

[0037] Headrest folding process: Taking a dual-actuator single-motor setup as an example, pressing the button starts the dual-actuator motor. The first actuator retracts the unlocking cable 32, pulling the folding mechanism assembly 1 to unlock. The folding mechanism assembly 1 then drives the headrest to complete the folding action. A more detailed explanation of the folding mechanism assembly 1 described above is provided below:

[0038] The motor drives the unlocking cable 32 to move downwards, which in turn drives the unlocking slider 31 to slide upwards along the headrest frame 2. This causes the locking tongue 12 on the unlocking slider 31 to rotate upwards. The rotation of the locking tongue 12 causes the trigger 14 on the connecting shaft 13 to rotate, which in turn causes the unlocking lock cylinder 16 to rotate, thereby releasing the locking member 17 and disengaging it from the locking member 17. The entire folding mechanism assembly 1 is then unlocked, and the headrest folds forward under the action of the unlocking torsion spring 18. After unlocking, the unlocking slider 31 continues to move upwards. When it reaches its maximum stroke, the locking tongue 12 returns to its initial position under the action of the return torsion spring 15, and the unlocking slider 31 returns to its initial position under the action of the auxiliary spring 34 and the return tension spring 33.

[0039] Headrest reset process: Taking a dual-actuator single-motor setup as an example, the dual-actuator motor starts in reverse. The second actuator retracts the reset cable 42, which bypasses the fixed pulley 41, changing the direction of force transmission. This pulls the headrest frame 2 back to a vertical position, and the headrest is fixed by the locking element 17 of the folding mechanism assembly 1. By optimizing the installation position of the fixed pulley, the angle between the direction of the motor's output pulling force and the direction of the reset force required for headrest reset is optimal (optimal is 90°). This maximizes the direct conversion of the motor's pulling force into the reset force, reducing force loss. The reset cable 42 pulls the headrest back to its original vertical position.

[0040] This utility model presents an electrically driven folding and resetting headrest with high integration and cost advantages: It innovatively employs a single dual-actuator motor to simultaneously drive the unlocking and resetting actions, achieving integrated electric folding and resetting functions. Compared to a dual-motor solution, this significantly simplifies the structure, reduces cost and weight, and saves space. Efficient force transmission: By introducing a fixed pulley and optimizing its placement, the tension direction of the resetting cable can be adjusted to a 90° angle with the resetting force direction. According to the Pythagorean theorem, the tension equals the resetting force, thus efficiently converting the tension into the resetting force, significantly reducing losses during force transmission. This means a smaller output motor can be used, helping to reduce system noise and energy consumption. Performance improvement: It achieves complete electric folding and resetting functions for the headrest, offering convenient operation and enhancing the overall technological feel and quality of the vehicle. This solution is the first of its kind in the industry and has a clear competitive advantage. High reliability: The compact and reasonable structural design and clear force transmission path contribute to improved headrest reliability and lifespan.

[0041] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An electrically driven folding and resetting headrest, characterized in that, The device includes a folding mechanism assembly, a headrest frame connected to the folding mechanism assembly, an unlocking mechanism, and a reset mechanism disposed on the headrest frame. The unlocking mechanism includes an unlocking slider and an unlocking cable. The unlocking slider is disposed on the headrest frame. One end of the unlocking cable is connected to a motor, and the other end is connected to the unlocking slider. The unlocking slider is connected to the folding mechanism assembly. The reset mechanism includes a fixed pulley and a reset cable. The fixed pulley is disposed on the headrest frame, and the reset cable passes around the fixed pulley. One end of the reset cable is connected to a motor, and the other end is connected to the headrest frame.

2. The electrically driven folding and resetting headrest according to claim 1, characterized in that, The headrest frame is connected to the filling sponge, headrest foam, skin assembly, and headrest back shell.

3. The electrically driven folding and resetting headrest according to claim 1, characterized in that, When the reset cable is under tension, the angle between the direction of the tension applied to the headrest frame and the direction of the reset force required for the headrest to reset is 80° to 100°.

4. The electrically driven folding and resetting headrest according to claim 3, characterized in that, The included angle is 90°.

5. The electrically driven folding and resetting headrest according to claim 1, characterized in that, The unlocking slider is provided with reset springs between its two sides and the headrest frame.

6. The electrically driven folding and resetting headrest according to claim 1, characterized in that, An auxiliary spring is fitted onto the unlocking pull line at the top of the unlocking slider.

7. The electrically driven folding and resetting headrest according to claim 1, characterized in that, The folding mechanism assembly is connected to the headrest frame via a pressure cap.

8. The electrically driven folding and resetting headrest according to claim 1, characterized in that, The folding mechanism assembly includes headrest rods, and a connecting rod is provided between the two headrest rods.

9. The electrically driven folding and resetting headrest according to claim 8, characterized in that, The folding mechanism assembly includes a latch, a connecting shaft, a trigger, a reset torsion spring, an unlocking lock cylinder, a locking element, an unlocking torsion spring, and a protective shell. The latch is rotatably connected to the unlocking slider. The latch is fixedly connected to one end of the connecting shaft. The connecting shaft is equipped with a trigger and a reset torsion spring. The other end of the trigger contacts one end of the unlocking lock cylinder. The unlocking lock cylinder is rotatably connected to the protective shell via a shaft. The other end of the unlocking lock cylinder contacts the locking element. The locking element is fixedly connected to the connecting rod. An unlocking torsion spring is sleeved on the connecting rod between the locking element and the protective shell.

10. The electrically driven folding and resetting headrest according to claim 9, characterized in that, The lower part of the unlocking slider is provided with an unlocking groove, and the locking tongue rotates within the unlocking groove.

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