Synchronous folding mechanism for automobile seat headrest

Abstract

The utility model discloses an automobile seat headrest synchronous folding mechanism which comprises a base, a backrest framework is connected to the base in a rotating mode, a headrest capable of overturning forwards is connected to the top of the backrest framework, and a locking mechanism is arranged in the headrest and used for limiting the headrest from overturning forwards relative to the backrest framework. A linkage assembly is arranged on the lower portion of the backrest framework, an inhaul cable is arranged between the linkage assembly and the locking mechanism, and in the process that the backrest framework is turned over forwards relative to the base, the linkage assembly can drive the locking mechanism to be unlocked through the inhaul cable, so that the headrest is turned over forwards synchronously. The device has the beneficial effects that through the arranged linkage assembly, in the process that the seat backrest is put down forwards, the linkage assembly can pull the inhaul cable so that the locking mechanism can be unlocked, then synchronous forward overturning of the headrest is achieved, compared with a traditional mode that an electric actuator is used for operation, the linkage assembly saves the installation space of the electric actuator, and the installation space of the electric actuator is saved. And the whole structure is more compact.

Description

Technical Field

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

[0002] As a crucial component of a car, excellent vehicle seat design can enhance its competitiveness. Currently, most rear car seatbacks also feature a forward-folding function. When there are no rear passengers, folding down the backrests creates more interior space for loading items. However, in some small and medium-sized cars with limited interior space, the headrests may interfere with the front seatbacks when the backrests are folded forward.

[0003] To avoid interference, headrest flipping mechanisms have been introduced on the market. For example, Chinese invention patent CN118405042A discloses a headrest folding device for a vehicle seat. The headrest integrates a folding device and an unlocking device. Pulling the unlocking device with a cable unlocks the headrest, allowing the folding device to automatically flip the headrest. The key to achieving automatic headrest flipping lies in pulling the cable. Current cable operation methods primarily use electric actuators, but the added electric actuators make the overall seat back structure very bulky. Furthermore, the headrest flipping and seat back flipping are independent of each other, and the entire deformation process is not continuous. Utility Model Content

[0004] In view of this, the present invention provides a car seat headrest synchronous folding mechanism, which enables the headrest to fold synchronously when the seat back is folded forward.

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

[0006] A car seat headrest synchronous folding mechanism includes a base, a backrest frame rotatably connected to the base, and a headrest that can be flipped forward connected to the top of the backrest frame. The headrest is characterized by having a locking mechanism inside, which restricts the headrest from flipping forward relative to the backrest frame; a linkage component is provided at the lower part of the backrest frame, and a cable is provided between the linkage component and the locking mechanism. During the forward folding of the backrest frame relative to the base, the linkage component can unlock the locking mechanism via the cable, allowing the headrest to flip forward synchronously.

[0007] With the above structure, through the set linkage component, when the seat back is folded forward, the linkage component can pull the cable to unlock the locking mechanism, thereby realizing the synchronous forward flipping of the headrest. Compared with the traditional operation using electric actuators, the linkage component saves the installation space of electric actuators, making the overall structure more compact.

[0008] Preferably, the linkage assembly includes a linkage component and a drive component. The linkage component is rotatably mounted on the lower end of the backrest frame, and the drive component is fixedly mounted on the base. The lower end of the cable is connected to the linkage component. During the forward tilting and folding of the backrest frame relative to the base, the linkage component can collide with the drive component and, under the obstruction of the drive component, force the linkage component to rotate, thereby pulling the cable. With this structure, the linkage component is forced to rotate relative to the seat back by the obstruction of the drive component, which in turn drives the cable, thus achieving synchronous forward tilting of the headrest.

[0009] Preferably, an elastic element is provided between the linkage component and the backrest frame. After the backrest frame is flipped and lifted relative to the base, the elastic element drives the linkage component to return to its original position. With this structure, the linkage component can be reset via the elastic element, thus resetting the cable and consequently the headrest.

[0010] Preferably, the linkage component has a trigger section, one side of which has a concave arc surface. When the backrest frame is in a seated position, the end of the trigger section is directly opposite the drive component. During the forward flipping and folding of the backrest frame, the drive component can first push the linkage component to rotate, and then maintain sliding contact with the concave arc surface. After the locking mechanism is unlocked, the center of the concave arc surface coincides with the rotation center line of the backrest frame. With the above structure, when the drive component contacts the trigger section, it can force the linkage component to rotate relative to the backrest frame, thereby realizing the unlocking and flipping of the headrest. When the center of the concave arc surface of the linkage component coincides with the rotation center of the backrest frame, since the drive component also rotates relative to the rotation center of the backrest frame, the drive component cannot further force the linkage component to rotate. The linkage component continues to rotate synchronously with the backrest frame, effectively avoiding further pulling on the pull cable, thereby avoiding the possibility of the headrest over-travel and the pull cable breakage.

[0011] Preferably, when the backrest frame is in a seated position, there is a gap between the end of the trigger segment and the drive component. This structure provides a free travel range, ensuring that the car seat backrest can be adjusted freely within a comfortable range without triggering the linkage component to automatically flip the headrest forward.

[0012] Preferably, the headrest has a built-in elastic actuator. After the locking mechanism is unlocked, the elastic actuator can push the headrest to automatically fold forward. This structure further ensures that the headrest can automatically flip forward after the cable is pulled to unlock.

[0013] Preferably, the base is used for fixed installation on the vehicle floor; or, the base is part of the rear end of the seat frame. This structure allows the seat to be fixedly installed or slidably installed inside the vehicle.

[0014] Preferably, the linkage component is a C-shaped plate structure, with its middle section rotatably mounted on the backrest frame. The trigger segment is located at the lower end of the linkage component, and the cable is fixedly connected to the upper end of the linkage component. This structure ensures that when the driving component forces the linkage component to rotate, the center of the concave arc surface changes accordingly.

[0015] Preferably, the driving component is a roller, and a mounting seat is fixedly installed on the base, with the driving component rotatably mounted on the mounting seat. This structure further ensures that when the center of the concave arc surface coincides with the rotation center of the backrest frame, the driving component cannot further force the linkage component to rotate, and the driving component can also roll relative to the linkage component on its concave arc surface.

[0016] Preferably, the inner ring of the linkage component has an inwardly protruding limiting protrusion at its center. This structure limits the overall tilting angle of the backrest frame.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The car seat headrest synchronous folding mechanism provided by this utility model uses a linkage component. When the seat back is folded forward, the linkage component can pull the cable to unlock the locking mechanism, thereby realizing the synchronous forward folding of the headrest. Compared with the traditional operation using an electric actuator, the linkage component saves the installation space of the electric actuator, making the overall structure more compact.

[0019] 2. The installation distance between the trigger segment and the drive component allows the seat back to rotate within the normal comfort adjustment range without pulling the cable. When the trigger segment contacts the drive component, the drive component forces the linkage component to rotate relative to the backrest frame. The rotation of the linkage component pulls the cable, unlocking the headrest and causing it to flip forward synchronously. When the linkage component rotates relative to the backrest frame until the center of its concave arc surface coincides with the rotation center of the backrest frame, the drive component cannot force the linkage component to rotate further. The drive component can move relative to the linkage component on its concave arc surface. Specifically, after the linkage component rotates relative to the backrest frame to a certain angle, it can continue to rotate synchronously with the backrest frame. This design avoids further pulling on the cable, thus preventing overload of the headrest's forward flipping travel. Attached Figure Description

[0020] Figure 1 This is a structural diagram of a car seat in its normal operating state.

[0021] Figure 2 This is a structural diagram of the headrest 3 in its unlocked and folded state.

[0022] Figure 3 for Figure 1 A magnified view of a portion of the image;

[0023] Figure 4 A structural diagram showing the layout of the linkage component A (installation column 8 is hidden);

[0024] Figure 5 A schematic diagram of the structure in which the driving component 5 forces the linkage component 4 to rotate (the mounting column 8 has been hidden);

[0025] Figure 6 A structural diagram showing the installation position of the elastic element 9 (driving component 5 has been hidden). Detailed Implementation

[0026] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, a car seat headrest synchronous folding mechanism includes a base 1, a backrest frame 2 rotatably mounted on the base 1, a headrest 3 that can be flipped forward mounted on the top of the backrest frame 2, a locking mechanism installed inside the headrest 3, the locking mechanism is used to flip the headrest 3 forward relative to the backrest frame 2, a linkage component A is installed at the lower end of the backrest frame 2, and a pull cable 6 is provided between the linkage component A and the locking mechanism. During the process of the backrest frame 2 flipping forward relative to the base 1, the linkage component A can drive the locking mechanism to unlock through the pull cable 6, so that the headrest 3 flips forward synchronously.

[0028] With this design, the headrest 3 can be flipped forward synchronously by pulling the cable 6 through the linkage component A. Compared with the traditional operation using electric actuators, the design of linkage component A saves the installation space of electric actuators, making the overall structure of the seat more compact.

[0029] Specifically, such as Figure 3 As shown, the linkage component A includes a linkage component 4 and a drive component 5. The linkage component 4 is rotatably mounted on the lower end of the backrest frame 2, and the drive component 5 is fixedly mounted on the base 1. The lower end of the cable 6 is connected to the linkage component 4. During the process of the backrest frame 2 flipping and falling forward relative to the base 1, the linkage component 4 can collide with the drive component 5, and under the blocking action of the drive component 5, the linkage component 4 is forced to rotate, thereby pulling the cable 6 to move.

[0030] Furthermore, such as Figure 4 As shown, the linkage component 4 has a trigger section 4a, and a concave arc surface 4b is provided on one side of the trigger section 4a. When the backrest frame 2 is in a sitting position, the end of the trigger section 4a is directly opposite the drive component 5. During the process of the backrest frame 2 flipping forward and falling down, the drive component 5 can first push the linkage component 4 to rotate, and then maintain sliding contact with the concave arc surface 4b. After the locking mechanism is unlocked, the center of the concave arc surface 4b coincides with the rotation center line of the backrest frame 2.

[0031] With this design, when the end of the trigger segment 4a contacts the drive component 5, the drive component 5 can force the linkage component 4 to rotate relative to the backrest frame 2. During the rotation of the linkage component 4, it can pull the cable 6, thereby unlocking the headrest 3 and rotating it forward synchronously relative to the backrest frame 2. Since the drive component 5 is fixedly installed on the base 1, during the forward flipping of the backrest frame 2 relative to the base 1, the drive component 5 can be regarded as rotating on the backrest frame 2 with the rotation center of the backrest frame 2 as the origin. When the drive component 5 forces the linkage component 4 to rotate to the moving angle, the center of the concave arc surface 4b coincides with the rotation center line of the backrest frame 2. At this time, the drive component 5 cannot further force the linkage component 4 to rotate, but instead slides relative to the linkage component 4 on its concave arc surface 4b. Specifically, after the linkage component 4 rotates relative to the backrest frame 2 to a certain angle, it continues to rotate synchronously with the backrest frame 2. This design avoids the cable 6 being pulled further, thus ensuring that the forward flipping of the headrest 3 does not exceed the travel and preventing the cable 6 from being torn.

[0032] Furthermore, in this embodiment, when the backrest frame 2 is in a seated position, there is a gap between the end of the trigger segment 4a and the drive component 5. This design provides a free travel before the headrest 3 is unlocked, thereby allowing for arbitrary adjustments within the comfort range of the seat back.

[0033] like Figure 3 and Figure 6 As shown, a mounting post 8 extending along the width direction of the car seat is fixedly installed on the backrest frame 2. The linkage component 4 is rotatably mounted on the mounting post 8, and an elastic element 9 is also fitted on the mounting post 8. The elastic element 9 is disposed between the backrest frame 2 and the linkage component 4. In this embodiment, the elastic element 9 is preferably a torsion spring. When the backrest frame 2 is flipped and lifted relative to the base 1, and the linkage component 4 and the drive component 5 are separated, the linkage component 4 can be reset under the elastic action of the torsion spring, thereby causing the cable 6 to reset.

[0034] like Figure 4 and Figure 5As shown, in this embodiment, the linkage component 4 is a "C"-shaped plate structure. The middle part of the linkage component 4 is rotatably mounted on the mounting column 8. The trigger segment 4a is located at the lower end of the linkage component 4, and the end of the cable 6 is fixedly connected to the upper end of the linkage component 4. The concave arc surface 4b is formed in the inner circle of the linkage component 4. With this design, when the driving component 5 forces the linkage component 4 to rotate relative to the backrest frame 2, the center of the concave arc surface 4b can change and eventually coincide with the rotation center line of the backrest frame 2.

[0035] like Figure 4 As shown, a limiting protrusion 4c is also provided in the middle of the inner ring of the linkage component 4. When the drive component 5 rotates relative to the linkage component 4 to contact the limiting protrusion 4c, the limiting protrusion 4c can block the drive component 5 from continuing to rotate, which prevents the backrest frame 2 from flipping forward further, thereby limiting the flipping angle of the backrest frame 2.

[0036] In this embodiment, the driving component 5 is a roller, and the mounting base 7 is fixedly installed on the base 1 by bolts. The driving component 5 is rotatably mounted on the mounting base 7. With this design, when the driving component 5 maintains sliding contact with the concave arc surface 4b, the rotatable mounting design can effectively reduce the resistance between the driving component 5 and the concave arc surface 4b, and further prevent the linkage component 4 from rotating again.

[0037] In this embodiment, an elastic actuator is installed inside the headrest 3. After the locking mechanism is unlocked, the elastic actuator can push the headrest to automatically fold forward. Since unlocking the elastic actuator through the unlocking structure to achieve automatic flipping of the headrest 3 is existing technology, it will not be described in detail in this embodiment.

[0038] In this embodiment, the base 1 can be fixedly installed on the vehicle floor. At this time, the rear seat of the car is fixedly installed. In addition, the base 1 can also be part of the rear end of the seat frame. By integrating a slide rail at the lower end of the seat frame, the car seat can be moved or rotated.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A synchronous folding mechanism of a headrest of a car seat, comprising a base (1), a backrest frame (2) rotatably connected to the base (1), and a headrest (3) connected to the top of the backrest frame (2) and capable of being folded forward, characterized in that: The headrest (3) is provided with a locking mechanism for limiting the forward tilting of the headrest (3) relative to the backrest framework (2); The lower part of the backrest framework (2) is provided with a linkage assembly (A), and a cable (6) is arranged between the linkage assembly (A) and the locking mechanism. During the forward tilting and folding of the backrest framework (2) relative to the base (1), the linkage assembly (A) can drive the locking mechanism to be unlocked through the cable (6), so that the headrest (3) is synchronously tilted forward.

2. The synchronous folding mechanism of the automobile seat headrest according to claim 1, characterized in that: The linkage assembly (A) comprises a linkage component (4) and a driving component (5). The linkage component (4) is rotatably installed at the lower end of the backrest framework (2), and the driving component (5) is fixedly installed on the base (1). The lower end of the cable (6) is connected to the linkage component (4). During the forward tilting and folding of the backrest framework (2) relative to the base (1), the linkage component (4) can collide with the driving component (5) and be forced to rotate under the blocking action of the driving component (5) to pull the cable (6) to move.

3. The synchronous folding mechanism of the automobile seat headrest according to claim 2, characterized in that: An elastic element (9) is arranged between the linkage component (4) and the backrest framework (2). After the backrest framework (2) is tilted backward relative to the base (1), the elastic element (9) is used to drive the linkage component (4) to reset.

4. The synchronous folding mechanism of the automobile seat headrest according to claim 2, characterized in that: The linkage component (4) has a trigger segment (4a) provided with an inner concave arc surface (4b) on one side. When the backrest framework (2) is in a sitting position, the end of the trigger segment (4a) is arranged opposite to the driving component (5). During the forward tilting and folding of the backrest framework (2), the driving component (5) can first push the linkage component (4) to rotate and then keep sliding contact with the inner concave arc surface (4b). After the locking mechanism is unlocked, the center of the inner concave arc surface (4b) coincides with the rotation center line of the backrest framework (2).

5. The synchronous folding mechanism of the automobile seat headrest according to claim 4, characterized in that: When the backrest framework (2) is in a sitting position, there is a spacing between the end of the trigger segment (4a) and the driving component (5).

6. The synchronous folding mechanism of the automobile seat headrest according to claim 1, characterized in that: The headrest (3) is provided with an elastic driver. After the locking mechanism is unlocked, the elastic driver can push the headrest to automatically fold forward.

7. The synchronous folding mechanism of the automobile seat headrest according to claim 1, characterized in that: The base (1) is fixedly installed on the vehicle floor. Alternatively, the base (1) is part of the rear end of a seat frame.

8. The synchronous folding mechanism of the automobile seat headrest according to claim 4, characterized in that: The linkage component (4) is in a "C" shape and is plate-shaped. The middle part of the linkage component (4) is rotatably installed on the backrest framework (2). The trigger segment (4a) is arranged at the lower end of the linkage component (4). The cable (6) is fixedly connected to the upper end of the linkage component (4).

9. The synchronous folding mechanism of the automobile seat headrest according to claim 4, characterized in that: The driving component (5) is a roller. The base (1) is fixedly provided with a mounting seat (7). The driving component (5) is rotatably installed on the mounting seat (7).

10. The synchronous folding mechanism of the automobile seat headrest according to claim 8, characterized in that: The inner ring of the linkage component (4) is provided with an inwardly protruding limiting protrusion (4c) in the middle part.

Images