Rearwardly electrically folding headrest mechanism

Abstract

The utility model provides a headrest mechanism can be folded back to electric, including headrest assembly, screw rod drive mechanism, base, rotating shaft and fixed bolster, screw rod drive mechanism and fixed bolster all solid are established on the base, rotating shaft is rotatably connected on the fixed bolster, headrest assembly is fixed on the rotating shaft, screw rod drive mechanism is connected with rotating shaft through connecting rod mechanism, screw rod drive mechanism and connecting rod mechanism are rotatory connection, connecting rod mechanism and rotating shaft are fixed connection, connecting rod mechanism is rotatory connection still on the base, when screw rod drive mechanism drives connecting rod mechanism to move, can drive rotating shaft to rotate back, thereby drive headrest assembly to fold back, the utility model discloses can realize the big angle folding back of headrest assembly, whether the driver needs to adjust the headrest angle in the specific driving scene, or leans back and folds back, the headrest needs to fold back to the rear larger angle to realize the storage, and this structure can provide enough folding range, greatly enhanced the use convenience of headrest.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to a headrest mechanism that can be electrically folded backward. Background Technology

[0002] In the field of modern automotive seat design, headrests, as crucial components for ensuring the safety of passengers' heads and necks and enhancing seating comfort, have always been a key focus of research and development in terms of performance and function. Among these, electrically adjustable headrests that can fold back have garnered significant attention due to their ability to flexibly adjust the headrest angle according to different usage scenarios, meeting diverse seating needs. However, traditional electrically adjustable headrest mechanisms have several limitations in design and application, the most prominent being the limited folding angle. In actual use of automotive seats, users have diverse needs regarding the headrest's folding angle. For example, during long-distance driving, drivers may want to steplessly adjust the headrest's folding angle to obtain more comfortable neck support and alleviate driving fatigue; or, when adjusting the backrest, they may want to achieve the desired folding effect without manually removing the headrest. However, due to limitations in structural design and the coordination between components, traditional electrically adjustable headrest mechanisms cannot fold back to a large angle for effective folding, still requiring manual removal, which is time-consuming and laborious. Utility Model Content

[0003] In view of the problems existing in the prior art, the present invention aims to provide a headrest mechanism that can be electrically folded backward, so as to realize the large-angle backward folding of the headrest assembly.

[0004] To achieve the above objectives, this utility model proposes a headrest mechanism capable of electrically folding backward, comprising a headrest assembly, a lead screw drive mechanism, and a base, as well as a rotating shaft, a fixed bracket, and a linkage mechanism. The lead screw drive mechanism and the fixed bracket are both fixedly mounted on the base. The rotating shaft is rotatably connected to the fixed bracket, and the headrest assembly is fixed to the rotating shaft. The lead screw drive mechanism is connected to the rotating shaft via the linkage mechanism, wherein the lead screw drive mechanism and the linkage mechanism are rotatably connected, and the linkage mechanism is fixedly connected to the rotating shaft. The linkage mechanism is also rotatably connected to the base. When the lead screw drive mechanism drives the linkage mechanism to move, it can drive the rotating shaft to rotate backward, thereby causing the headrest assembly to fold backward.

[0005] In the above solution, the lead screw transmission mechanism includes a motor, a gearbox, and a lead screw assembled together. The lead screw is vertically arranged, and the motor can drive the lead screw to move axially through the gearbox, i.e., drive the lead screw to move up and down. This transmission method has low energy loss and can quickly respond to the motor's drive command, enabling the lead screw to move up and down rapidly, thereby driving the headrest assembly to achieve a fast and smooth backward flipping action, effectively improving the working efficiency of the headrest mechanism.

[0006] In the above solution: the linkage mechanism includes a first link, a second link, and a third link. The lower ends of the first link, the lower ends of the second link, and the upper end of the lead screw are rotatably connected together. The upper end of the first link is rotatably connected to the base. The upper end of the second link is rotatably connected to the lower end of the third link. The upper end of the third link is fixed to the rotating shaft. When the lead screw is driven to move upward, it can drive the first link, the second link, and the third link to rotate, thereby driving the rotating shaft to rotate, and thus driving the headrest assembly to fold backward. The combination design of the three links provides the headrest assembly with a larger folding angle range. When the lead screw moves upward, each link achieves a complex motion trajectory through rotational connection, which can drive the rotating shaft to achieve a large-amplitude rotation, so that the headrest assembly can be flipped backward to a more suitable position, meeting the diverse needs of different users for headrest angle in different usage scenarios.

[0007] In the above scheme: there are two fixed supports, one on the left and one on the right, and the rotating shaft is rotatably connected between the two fixed supports. The two fixed supports together support the rotating shaft, making the force on the rotating shaft more balanced during rotation.

[0008] In the above solution: the headrest assembly includes two headrest rods and a headrest fixed to the upper end of the two headrest rods. The lower ends of the two headrest rods are respectively fixed to the rotating shaft by headrest rod fasteners. The headrest rod fasteners fix the lower ends of the headrest rods to the rotating shaft, making the entire headrest assembly and the rotating shaft form an organic whole, ensuring the stability and reliability of the structure.

[0009] The beneficial effects of this utility model are as follows: 1. Traditional electric headrest mechanisms are limited by their structure, resulting in a small folding angle that is difficult to meet the diverse needs of users. This utility model, through the ingenious cooperation of the screw drive mechanism, linkage mechanism, and rotating shaft, can easily achieve a large-angle rearward folding of the headrest assembly. Whether the driver needs to adjust the headrest angle in a specific driving scenario, or the headrest needs to be folded back at a large angle for storage when adjusting the backrest, this structure provides sufficient folding range, greatly enhancing the convenience of the headrest (in actual applications, the folding angle can reach greater than 150°). 2. The fixed bracket provides stable support for the rotating shaft, ensuring that the rotating shaft will not wobble or deviate during rotation, reducing noise and vibration caused by friction and collision between transmission components. The screw drive mechanism has a self-locking function, which ensures that the headrest assembly remains stable after being adjusted to the required angle and will not easily change position due to external forces, improving the reliability and safety of the headrest mechanism. 3. This structure is simple, occupies little space, and is easy to arrange. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This is an exploded schematic diagram of this utility model.

[0012] Figure 3 This is an enlarged schematic diagram of the linkage mechanism of this utility model.

[0013] Figure 4 This is a diagram showing the headrest in its initial position.

[0014] Figure 5 This is a diagram showing the headrest folded to the middle position.

[0015] Figure 6 This is a diagram showing the headrest folded to its final position.

[0016] Figure 7 This is a diagram illustrating the principle of headrest folding. Detailed Implementation

[0017] like Figure 1 As shown in Figure 7, a headrest mechanism that can be electrically folded backward mainly consists of a headrest assembly A, a screw drive mechanism B, a base 1, a rotating shaft 2, a fixed bracket 3, and a linkage mechanism C.

[0018] Both the lead screw drive mechanism B and the fixed bracket 3 are fixed on the base 1. The rotating shaft 2 is rotatably connected to the fixed bracket 3. The headrest assembly A is fixed on the rotating shaft 2. The lead screw drive mechanism B is connected to the rotating shaft 2 through the linkage mechanism C. The lead screw drive mechanism B and the linkage mechanism C are rotatably connected. The linkage mechanism C and the rotating shaft 2 are fixedly connected. The linkage mechanism C is also rotatably connected to the base 1.

[0019] When the lead screw transmission mechanism B drives the linkage mechanism C to move, it can drive the rotating shaft 2 to rotate backward, thereby causing the headrest assembly A to fold backward.

[0020] Ideally, the lead screw drive mechanism B includes a motor 4, a gearbox 5, and a lead screw 6 assembled together. The lead screw 6 is vertically arranged, and the motor 4 can drive the lead screw 6 to move axially through the gearbox 5, that is, drive the lead screw 6 to move up and down. This transmission method has low energy loss and can quickly respond to the drive command of the motor 5, so that the lead screw 6 can move up and down rapidly, thereby driving the headrest assembly A to achieve a fast and smooth backward flipping action, effectively improving the working efficiency of the headrest mechanism.

[0021] Preferably, the linkage mechanism C includes a first link 7, a second link 8, and a third link 9. The lower ends of the first link 7, the second link 8, and the lead screw 6 are rotatably connected together. The upper end of the first link 7 is rotatably connected to the base 1. The upper end of the second link 8 is rotatably connected to the lower end of the third link 9. The upper end of the third link 9 is fixed to the rotating shaft 2. When the lead screw 6 is driven upward by the motor 4, it can drive the first link 7, the second link 8, and the third link 9 to rotate, thereby driving the rotating shaft 2 to rotate, and thus driving the headrest assembly A to fold backward.

[0022] The three-bar linkage design provides a wider range of tilt angles for the headrest assembly A. When the lead screw 6 moves upward, the linkages achieve complex motion trajectories through rotational connection, which can drive the rotating shaft 2 to achieve a larger range of rotation, so that the headrest assembly A can be tilted backward to a more suitable position, meeting the diverse needs of different users for headrest angle in different usage scenarios.

[0023] Ideally, there should be two fixed supports 3, one on the left and one on the right, with the rotating shaft 2 rotatably connected between the two fixed supports 3. The two fixed supports 3 together support the rotating shaft 2, making the force on the rotating shaft 2 more balanced during rotation.

[0024] Ideally, the headrest assembly A includes two headrest rods 10 and a headrest 11 fixed to the upper end of the two headrest rods 10. The lower ends of the two headrest rods 10 are respectively fixed to the rotating shaft 2 by headrest rod fixing members 12. The headrest rod fixing members 12 fix the lower ends of the headrest rods 10 to the rotating shaft 2, so that the entire headrest assembly A and the rotating shaft 2 form an organic whole, ensuring the stability and reliability of the structure.

Claims

1. A headrest mechanism capable of electrically folding backward, comprising a headrest assembly (A), a lead screw drive mechanism (B), and a base (1), characterized in that: It also includes a rotating shaft (2), a fixed bracket (3), and a linkage mechanism (C). The screw drive mechanism (B) and the fixed bracket (3) are both fixed on the base (1). The rotating shaft (2) is rotatably connected to the fixed bracket (3). The headrest assembly (A) is fixed on the rotating shaft (2). The screw drive mechanism (B) is connected to the rotating shaft (2) through the linkage mechanism (C). The screw drive mechanism (B) and the linkage mechanism (C) are rotatably connected, and the linkage mechanism (C) and the rotating shaft (2) are fixedly connected. The linkage mechanism (C) is also rotatably connected to the base (1). When the screw drive mechanism (B) drives the linkage mechanism (C) to move, it can drive the rotating shaft (2) to rotate backward, thereby driving the headrest assembly (A) to fold backward.

2. The headrest mechanism capable of electrically folding backwards according to claim 1, characterized in that: The lead screw transmission mechanism (B) includes a motor (4), a gearbox (5) and a lead screw (6) assembled together. The lead screw (6) is arranged vertically, and the motor (4) can drive the lead screw (6) to move axially through the gearbox (5).

3. The headrest mechanism capable of electrically folding backwards according to claim 2, characterized in that: The linkage mechanism (C) includes a first link (7), a second link (8), and a third link (9). The lower ends of the first link (7), the second link (8), and the upper end of the lead screw (6) are rotatably connected together. The upper end of the first link (7) is rotatably connected to the base (1). The upper end of the second link (8) is rotatably connected to the lower end of the third link (9). The upper end of the third link (9) is fixed on the rotating shaft (2). When the lead screw (6) is driven to move upward, it can drive the first link (7), the second link (8), and the third link (9) to rotate, thereby driving the rotating shaft (2) to rotate, and then driving the headrest assembly (A) to fold backward.

4. The headrest mechanism capable of electrically folding backwards according to claim 1, characterized in that: The fixed brackets (3) are two in number, one on the left and one on the right, and the rotating shaft (2) is rotatably connected between the two fixed brackets (3).

5. The headrest mechanism capable of electrically folding backward according to claim 1, characterized in that: The headrest assembly (A) includes two headrest rods (10) and a headrest (11) fixed to the upper end of the two headrest rods (10). The lower ends of the two headrest rods (10) are respectively fixed to the rotating shaft (2) by headrest rod fixing parts (12).

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