Single-motor-driven single-wire folding reset headrest and control method thereof

Abstract

The application discloses a single-motor driving single-pull-wire folding reset headrest, and relates to the technical field of automobile seats.The headrest comprises a headrest framework, a folding mechanism assembly, a pull wire and a pull wire motor.The folding mechanism assembly comprises a shell, a rotating shaft, a coil spring, a stopper and a rotating piece.The rotating shaft is connected with the headrest rod and fixedly connected with the headrest framework.The shell, the coil spring and the stopper are connected with the rotating shaft.The one end of the coil spring is connected with the shell, and the other end is connected with the stopper.The rotating piece is rotatably connected with the stopper, and a stop point is arranged between the rotating piece and the stopper for limiting.The two ends of the pull wire are respectively connected with the headrest framework and the pull wire motor.The headrest is bidirectionally controlled by the single motor and the single pull wire, and the structure is compact and low in cost, which is suitable for high-end vehicles.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, and in particular to a single-motor driven, single-cable folding and resetting headrest and its control method. Background Technology

[0002] With the increasing demands for intelligent and comfortable vehicles, the functions of seat headrests are becoming increasingly diversified. Currently, to achieve the electric folding and resetting functions of headrests, two methods are typically used: one is to use dual motors to control folding and resetting separately, and the other is to use dual cables in conjunction with a single motor to achieve unidirectional control. However, the dual-motor solution is costly and space-consuming; the dual-cable single-motor solution typically only achieves unidirectional drive, i.e., it can only achieve folding or only resetting, making it difficult to achieve bidirectional control simultaneously with a single motor, resulting in a complex structure and cumbersome control logic.

[0003] Therefore, there is an urgent need for a headrest structure that is compact, low-cost, and capable of both folding and resetting via a single motor and a single cable. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a single-motor driven, single-wire folding and resetting headrest and its control method, thereby solving the problem that a single motor cannot simultaneously achieve both folding and resetting functions of the headrest in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A single-motor driven, single-wire folding and resetting headrest includes: a headrest frame, a folding mechanism assembly, a wire, and a wire motor. The folding mechanism assembly includes a housing, a rotating shaft, a coil spring, a stop, and a rotating component. The rotating shaft is connected to a headrest rod and then fixedly connected to the headrest frame. The housing, coil spring, and stop are all connected to the rotating shaft. One end of the coil spring is connected to the housing, and the other end is connected to the stop. The rotating component is rotatably connected to the stop, and a stop point for limiting movement is provided between them. The two ends of the wire are respectively connected to the headrest frame and the wire motor.

[0006] Preferably, the rotating component is mounted on an intermediate shaft, which is connected to the outer casing.

[0007] Preferably, both the stop member and the rotating member have arc-shaped portions that facilitate rotational connection.

[0008] Preferably, the rotating shaft is fixed to the headrest frame by a pressure cap and screws.

[0009] Preferably, the outer shell is fixed to the headrest frame by a fixing arm.

[0010] Preferably, the pull cable passes through the headrest rod and is fixed to the upper part of the headrest frame.

[0011] Preferably, it further includes a headrest foam, a soft pad, a skin assembly, and a headrest back shell, wherein the headrest foam, soft pad, and skin assembly sequentially cover the outside of the headrest frame, and the headrest back shell is located on the rear side of the headrest frame.

[0012] The present invention also provides a control method for a single-motor driven single-wire folding and resetting headrest as described above, comprising the following steps: Folding control steps: The actuator of the control cable motor extends, releasing the cable. The coil spring drives the headrest frame to fold relative to the headrest rod to the preset position. The cable motor stops, and the cable pulls the headrest to stop folding. Reset control steps: Control the actuator of the pull cable motor to retract, tighten the pull cable, drive the headrest frame at the other end of the pull cable to return to its original position, until the rotating part and the stop part are locked at the stop point, and the headrest is reset and locked.

[0013] By adopting the above-described technical solution, the beneficial effects of the present invention compared with the prior art are as follows: 1. The present invention provides a single-motor driven single-pull-wire folding and resetting headrest and its control method, which uses a pull-wire motor to control a pull-wire to achieve unlocking and resetting. By utilizing the different actions of the motor extending and retracting, the folding and resetting of the headrest are achieved respectively, breaking through the limitation of traditional single motors that can only achieve unidirectional drive. 2. The present invention provides a single-motor driven single-wire folding and resetting headrest and its control method. Compared with the dual-motor solution, the present invention significantly reduces the number of motors and control circuits, reduces manufacturing costs, and simplifies the assembly process. 3. The present invention provides a single-motor driven single-wire folding and resetting headrest and its control method. Compared with the traditional double-wire single-motor solution, the present invention does not require an additional unlocking structure. It achieves self-locking during resetting through a stop point locking structure. The structure is more compact and occupies less space, making it suitable for the demand for thin headrests in high-end luxury vehicles. 4. The present invention provides a single-motor driven single-pull-wire folding and resetting headrest and its control method, which has simple control logic, high reliability, and improves user experience. Attached Figure Description

[0014] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings: Figure 1 This is a perspective view of an embodiment of the present invention; Figure 2 This is another perspective view of an embodiment of the present invention; Figure 3 This is an exploded view of an embodiment of the present invention; The reference numerals in the attached drawings include: headrest frame 1, folding mechanism assembly 2, pull cable 3, headrest rod 4, soft padding 5, skin assembly 6, outer shell 21, rotating shaft 22, coil spring 23, stop 24, rotating part 25, intermediate shaft 26, arc-shaped part 27, fixed arm 211, pressure cover 221, screw 222, and stop point 241. Detailed Implementation

[0015] The technical solutions of various embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 communication between 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 invention based on the specific circumstances.

[0018] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0019] Reference Figures 1 to 3 , Figure 1 This is a perspective view of an embodiment of the present invention. Figure 2 This is another perspective view of an embodiment of the present invention. Figure 3This is an exploded view of an embodiment of the present invention. The present invention provides a single-motor driven, single-wire folding and resetting headrest, comprising: a headrest frame 1, a folding mechanism assembly 2, a wire 3, a wire motor (not shown), a headrest rod 4, headrest foam (not shown), soft padding 5, a cover assembly 6, and a headrest back shell (not shown). The folding mechanism assembly 2 includes a housing 21, a rotating shaft 22, a coil spring 23, a stop 24, a rotating component 25, an intermediate shaft 26, and an arc-shaped portion 27. The rotating shaft 22 is connected to the headrest rod 4 and then fixedly connected to the headrest frame 1. The rotating shaft 22 is preferably fixed to the headrest frame 1 via a pressure cap 221 and screws 222. The housing 21, coil spring 23, and stop 24 are all connected to the rotating shaft 22. More specifically, the rotating shaft 22 passes through the housing 21. The housing 21 is preferably fixed to the headrest frame 1 via a fixing arm 211 to form a stable rotation. The supporting structure includes a headrest frame 1 that rotates together with the outer shell 21 around the pivot 22. A coil spring 23 is fitted onto the pivot 22 and disposed inside the outer shell 21. One end of the coil spring 23 is connected to the outer shell 21, and the other end is connected to the stop member 24. The stop member 24 is fixedly disposed on the pivot. A rotating member 25 is disposed on an intermediate shaft 26, which is connected to the outer shell 21. Both the stop member 24 and the rotating member 25 have arc-shaped portions 27 that facilitate rotational connection. The rotating member 25 and the stop member 24 are rotatably connected, and a stop point 241 for limiting their movement is provided between them. The stop point 241 is preferably disposed on the stop member 24 to limit the rotation of the rotating member 25. When the headrest is in the reset position, the stop point 241 locks the two folding mechanisms to limit each other, achieving mechanical locking. The two ends of the pull cord 3 are connected to the headrest frame 1 and the pull cord motor, respectively. The pull cord 3 preferably passes through the headrest rod 4 and is fixed to the upper part of the headrest frame 1. The headrest foam (not shown), soft cotton 5, and skin assembly 6 are sequentially wrapped around the outside of the headrest frame 1. The headrest back shell (not shown) is placed on the back side of the headrest frame 1 to form a complete headrest appearance.

[0020] The present invention also provides a control method for a single-motor driven single-wire folding and resetting headrest as described above, comprising the following steps: Folding control steps: The actuator of the control cable motor extends, releasing the cable 3. The coil spring 23 drives the headrest frame 1 to fold relative to the headrest rod 4 to the preset position. The cable motor stops, and the cable 3 pulls the headrest to stop folding. Reset control steps: Control the actuator of the pull wire motor to retract, tighten the pull wire 3, drive the headrest frame 1 at the other end of the pull wire 3 to return to its original position, until the rotating part 25 and the stop part 24 are locked at the stop point 241, and the headrest is reset and locked.

[0021] The following will refer to Figures 1 to 3 The working principle of the present invention will be explained.

[0022] When the headrest needs to be folded from the reset state, the control system controls the actuator of the pull-wire motor to extend and release the pull wire 3. At this time, the stop point 241 between the rotating part 25 and the stop part 24 is locked, the elastic potential energy stored in the coil spring 23 is released, and the headrest frame 1 is driven to fold forward around the rotating shaft 22 until the preset folding angle is reached, after which the motor stops and the headrest remains in the folded position. The folding angle of the headrest is controlled by setting the stroke of the pull wire 3.

[0023] When the headrest needs to be reset from the folded state, the actuator of the control system's pull-wire motor retracts, tightening the pull wire 3. The pull wire 3 drives the headrest frame 1 to rotate back to its original position against the spring force. When the headrest frame 1 returns to its initial position, the locking structure at the stop point 241 between the rotating part 25 and the stop part 24 is relocked, the motor stops operating, and the headrest stabilizes in the reset position.

[0024] This invention discloses a single-motor driven, single-cable folding and resetting headrest and its control method. By controlling one cable with a single cable motor, unlocking and resetting are achieved. The different extension and retraction actions of the motor respectively realize the folding and resetting of the headrest, overcoming the limitation of traditional single-motor systems that can only achieve unidirectional drive. Compared to dual-motor solutions, this invention significantly reduces the number of motors and control circuitry, lowering manufacturing costs and simplifying assembly processes. Compared to traditional dual-cable single-motor solutions, this invention eliminates the need for an additional unlocking structure, achieving self-locking during resetting through a stop-point locking structure. The structure is more compact, occupies less space, and is suitable for the thin headrest requirements of high-end luxury vehicles. The control logic is simple, highly reliable, and enhances the user experience.

[0025] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention 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 the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A single-motor driven, single-wire folding and resetting headrest, characterized in that, include: The headrest frame, folding mechanism assembly, pull cable, and pull cable motor are included. The folding mechanism assembly includes a housing, a rotating shaft, a coil spring, a stop, and a rotating component. The rotating shaft is connected to the headrest rod and then fixedly connected to the headrest frame. The housing, coil spring, and stop are all connected to the rotating shaft. One end of the coil spring is connected to the housing, and the other end is connected to the stop. The rotating component is rotatably connected to the stop, and a stop point for limiting movement is provided between them. The two ends of the pull cable are respectively connected to the headrest frame and the pull cable motor.

2. The single-motor driven single-wire folding and resetting headrest according to claim 1, characterized in that, The rotating component is mounted on an intermediate shaft, which is connected to the outer casing.

3. A single-motor driven, single-wire folding and resetting headrest according to claim 1, characterized in that, Both the stop member and the rotating member have arc-shaped portions that facilitate rotational connection.

4. A single-motor driven, single-wire folding and resetting headrest according to claim 1, characterized in that, The rotating shaft is fixed to the headrest frame by a pressure cap and screws.

5. A single-motor driven, single-wire folding and resetting headrest according to claim 1, characterized in that, The outer shell is fixed to the headrest frame by a fixing arm.

6. A single-motor driven, single-wire folding and resetting headrest according to claim 1, characterized in that, The pull cable passes through the headrest rod and is fixed to the upper part of the headrest frame.

7. A single-motor driven, single-wire folding and resetting headrest according to claim 1, characterized in that, It also includes headrest foam, soft padding, skin assembly and headrest back shell, the headrest foam, soft padding and skin assembly are sequentially covered on the outside of the headrest frame, and the headrest back shell is located on the rear side of the headrest frame.

8. A control method for a single-motor driven, single-wire folding and resetting headrest as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Folding control steps: The actuator of the control cable motor extends, releasing the cable. The coil spring drives the headrest frame to fold relative to the headrest rod to the preset position. The cable motor stops, and the cable pulls the headrest to stop folding. Reset control steps: Control the actuator of the pull cable motor to retract, tighten the pull cable, drive the headrest frame at the other end of the pull cable to return to its original position, until the rotating part and the stop part are locked at the stop point, and the headrest is reset and locked.

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