A novel ultra-thin four-way electric headrest
By using a design that combines vertical and horizontal lead screw motors with a guiding mechanism, the problems of complex electric headrest drive structure and noise have been solved, resulting in a smaller headrest size and stable adjustment, thus improving the user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU ZHUOJUN AUTOMOTIVE SYST CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-31
AI Technical Summary
Existing electric headrests have complex drive structures, resulting in large size and noise issues during adjustment.
The main support frame is directly driven by vertical and horizontal lead screw motors, combined with a guide mechanism, which reduces the use of traditional gear meshing mechanisms and achieves a smaller headrest drive structure and stable adjustment.
The space occupied by the headrest drive structure has been reduced, improving adjustment stability and user comfort, and reducing noise issues.
Smart Images
Figure CN224576517U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive seat technology, and in particular to a novel ultra-thin four-way electric headrest. Background Technology
[0002] Headrests, as an important component of car seats, primarily serve to ensure the neck safety of drivers and passengers and enhance seating comfort. With continuous technological advancements, most high-end car seat headrests now feature electrically adjustable headrests. However, the drive structures of current electric headrests are quite complex, mostly employing gear transmission, resulting in a large internal drive structure and issues such as noise during adjustment. Utility Model Content
[0003] In view of the above problems, the purpose of this utility model is to provide a novel ultra-thin four-way electric headrest, which reduces the X-axis size of the headrest while improving adjustment stability, so as to overcome the shortcomings of the prior art.
[0004] This utility model provides a novel ultra-thin four-way electric headrest, comprising: a headrest rod mounted on a seat frame, and a four-way electric headrest mounted on the headrest rod. The improvement is that the four-way electric headrest includes: a crossbeam, a main body support, a guide support, a vertical lead screw motor, a horizontal lead screw motor, and a guide mechanism. The crossbeam is fixedly connected to the upper ends of two headrest rods. The main body support is slidably connected to the two headrest rods. The guide support is mounted on the main body support. Both the vertical and horizontal lead screw motors are fixedly connected to the main body support. The lead screw of the vertical lead screw motor is threaded into a vertical nut hole on the crossbeam, and the lead screw of the horizontal lead screw motor is threaded into a horizontal nut hole on the guide support. The guide mechanism includes guide blocks fixedly connected to both sides of the main body support and arranged horizontally, and guide rails fixedly connected to both sides of the guide support and slidably connected to the two guide blocks. The vertical lead screw motor drives the main body support to move up and down relative to the crossbeam, and the horizontal lead screw motor drives the guide support to move back and forth relative to the main body support. The front and rear shells of the headrest are mounted on the guide support.
[0005] As a preferred embodiment of this utility model, the crossbeam is a sheet metal crossbeam, and two fixing holes are provided on the crossbeam for connecting to the two headrest rods. The crossbeam is fixed to the two headrest rods through the two fixing holes. The vertical nut hole is provided on the crossbeam and located between the two fixing holes. The screw of the vertical screw motor rotates and moves up and down in the vertical nut hole, thereby driving the main body bracket fixed to the vertical screw motor to move up and down relative to the headrest rods.
[0006] As a preferred embodiment of this utility model, the guide bracket is a rectangular frame composed of a front sheet metal bracket, a rear sheet metal bracket, and two connecting sheet metal parts on the left and right. The front shell of the headrest is fixedly connected to the front sheet metal bracket, the rear shell is fixedly connected to the rear sheet metal bracket, the transverse nut hole is opened on the front sheet metal bracket, the screw of the transverse lead screw motor rotates and drives the transverse nut hole to move back and forth, thereby driving the guide bracket to move back and forth relative to the main body bracket.
[0007] As a preferred embodiment of this utility model, the inner sides of the two connecting sheet metals are fixedly connected to the guide rails, and the guide bracket is slidably connected to the guide blocks on both sides of the main body bracket through the two guide rails.
[0008] As a preferred embodiment of this invention, the wiring harnesses controlling the vertical lead screw motor and the horizontal lead screw motor pass through the inside of the headrest rod and connect the vertical lead screw motor and the horizontal lead screw motor.
[0009] The beneficial effects of this utility model are as follows: The addition of a guide mechanism between the guide bracket and the main body bracket makes the structure smoother and more stable compared to traditional electric headrests, improving the functional stability of the electric headrest in forward and backward movement and enhancing the user's comfort experience. Furthermore, the direct drive of the main body bracket and guide bracket by the vertical and horizontal lead screw motors results in a smaller overall structure space occupied. Compared to traditional gear meshing mechanisms, this significantly reduces the size of the headrest's X-axis (forward and backward) drive structure and Y-axis (up and down) drive structure. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the overall structure of the headrest in an embodiment.
[0011] Figure 2 This is a schematic diagram of the internal drive structure after removing the front and rear housings in an embodiment.
[0012] Figure 3 This is an exploded view of a partial structure of an embodiment.
[0013] Reference numerals: 1. Headrest rod; 2. Crossbeam; 3. Body bracket; 4. Guide bracket; 401. Front sheet metal bracket; 402. Rear sheet metal bracket; 403. Connecting sheet metal; 5. Vertical lead screw motor; 6. Horizontal lead screw motor; 7. Vertical nut hole; 8. Horizontal nut hole; 9. Guide block; 10. Guide rail; 11. Front housing of headrest; 12. Rear housing. Detailed Implementation
[0014] See Figure 1-3As shown, this embodiment provides a novel ultra-thin four-way electric headrest, comprising: a headrest rod 1 mounted on a seat frame, and a four-way electric headrest mounted on the headrest rod 1. The four-way electric headrest includes: a crossbeam 2, a main body support 3, a guide support 4, a vertical lead screw motor 5, a horizontal lead screw motor 6, and a guide mechanism. The crossbeam 2 is fixedly connected to the upper ends of the two headrest rods 1. The main body support 3 has two clearance holes, and guide sleeves are installed in the clearance holes. The main body support 3 is slidably connected to the two headrest rods 1 through the guide sleeves. The guide support 4 is mounted on the main body support 3 and moves back and forth on the main body support 3. The vertical lead screw motor 5 and the horizontal lead screw motor 6... All lead screw motors 6 are fixedly connected to the main body bracket 3 via motor mounts. The vertical lead screw motor 5 is mounted on the main body bracket 3 along the Y direction, and the horizontal lead screw motor 6 is mounted on the main body bracket 3 along the X direction. The lead screw of the vertical lead screw motor 5 is threaded into the vertical nut hole 7 opened on the crossbeam 2, and the lead screw of the horizontal lead screw motor 6 is threaded into the horizontal nut hole 8 opened on the guide bracket 4. The guide mechanism includes guide blocks 9 fixedly connected to both sides of the main body bracket 3 and arranged horizontally, and guide rails 10 fixedly connected to both sides of the guide bracket 4 and slidably connected to the two guide blocks 9. The front shell 11 and the rear shell 12 of the headrest are mounted on the guide bracket 4. The crossbeam 2 is a sheet metal crossbeam with two fixing holes for connecting to the two headrest rods 1. The crossbeam 2 is fixed to the two headrest rods 1 through the two fixing holes. The vertical nut hole 7 is located on the crossbeam 2 between the two fixing holes. The screw of the vertical screw motor 7 rotates and moves up and down in the vertical nut hole 7, thereby driving the main body bracket 3, which is fixed to the vertical screw motor 5, to move up and down relative to the headrest rods 1. The guide bracket 4 is a rectangular frame composed of a front sheet metal bracket 401, a rear sheet metal bracket 402, and two connecting sheet metal parts 403 on the left and right. The front shell 11 of the headrest is fixed to the front sheet metal bracket 401, and the rear shell 12 is fixed to the rear sheet metal bracket 402. The transverse nut hole 8 is located on the front sheet metal bracket 401. The screw of the transverse screw motor 6 rotates and drives the transverse nut hole 8 to move back and forth, thereby driving the guide bracket 4 to move back and forth relative to the main body bracket 3. The inner sides of the two connecting sheet metal 403 are fixedly connected with guide rails 10, and the guide bracket 4 is slidably connected to the guide blocks 9 on both sides of the main body bracket 3 through the two guide rails 10.
[0015] Furthermore, in this embodiment, the wiring harness controlling the vertical lead screw motor 5 and the horizontal lead screw motor 6 passes through the inside of the headrest rod 1 and connects the vertical lead screw motor 5 and the horizontal lead screw motor 6.
[0016] Working principle: The headrest moves up and down on the headrest rod 1 by means of a vertical lead screw motor 5 cooperating with the vertical nut hole 7 on the crossbeam 2, so that the main body bracket 3 moves up and down relative to the headrest rod 1 under the drive of the lead screw. Due to the direct drive of the vertical lead screw motor 5, the space used in the Z direction is greatly reduced compared to the gear drive method. The horizontal forward and backward movement of the headrest is achieved by means of a horizontal lead screw motor 6 driving the guide bracket 4. Since the lead screw of the horizontal lead screw motor 6 cooperates with the horizontal nut hole 8 opened on the guide bracket 4, the horizontal lead screw motor 6 pushes the guide bracket 4 to move forward and backward, thereby realizing the forward and backward movement of the headrest. Due to the direct drive of the horizontal lead screw motor 6, the size of the space used in the X direction of the headrest is greatly reduced compared to the traditional gear meshing mechanism.
[0017] 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. A novel ultra-thin four-way electric headrest, comprising: A headrest rod mounted on a seat frame and a four-way electric headrest mounted on the headrest rod are characterized in that the four-way electric headrest comprises: a crossbeam, a main body bracket, a guide bracket, a vertical lead screw motor, a horizontal lead screw motor, and a guide mechanism. The crossbeam is fixedly connected to the upper ends of two headrest rods. The main body bracket is slidably connected to the two headrest rods. The guide bracket is mounted on the main body bracket. The vertical lead screw motor and the horizontal lead screw motor are both fixedly connected to the main body bracket. The lead screw of the vertical lead screw motor is threaded into a vertical nut hole opened on the crossbeam. The lead screw of the horizontal lead screw motor is threaded into a horizontal nut hole opened on the guide bracket. The guide mechanism includes guide blocks fixedly connected to both sides of the main body bracket and arranged horizontally, and guide rails fixedly connected to both sides of the guide bracket and slidably connected to the two guide blocks. The vertical lead screw motor drives the main body bracket to move up and down relative to the crossbeam. The horizontal lead screw motor drives the guide bracket to move back and forth relative to the main body bracket. The front and rear shells of the headrest are mounted on the guide bracket.
2. The novel ultra-thin four-way electric headrest according to claim 1, characterized in that, The crossbeam is a sheet metal crossbeam with two fixing holes for connecting to the two headrest rods. The crossbeam is fixed to the two headrest rods through the two fixing holes. The vertical nut hole is located on the crossbeam between the two fixing holes. The screw of the vertical screw motor rotates and moves up and down in the vertical nut hole, thereby driving the main body bracket fixed to the vertical screw motor to move up and down relative to the headrest rods.
3. The novel ultra-thin four-way electric headrest according to claim 1, characterized in that, The guide bracket consists of a rectangular frame composed of a front sheet metal bracket, a rear sheet metal bracket, and two connecting sheet metal parts on the left and right. The front shell of the headrest is fixed to the front sheet metal bracket, and the rear shell is fixed to the rear sheet metal bracket. The transverse nut hole is opened on the front sheet metal bracket. The screw of the transverse lead screw motor rotates and drives the transverse nut hole to move back and forth, thereby driving the guide bracket to move back and forth relative to the main body bracket.
4. The novel ultra-thin four-way electric headrest according to claim 3, characterized in that, The inner sides of the two connecting sheet metals are fixedly connected to the guide rails, and the guide bracket is slidably connected to the guide blocks on both sides of the main body bracket through the two guide rails.
5. The novel ultra-thin four-way electric headrest according to claim 1, characterized in that, The wiring harnesses controlling the vertical and horizontal lead screw motors pass through the inside of the headrest rod and connect the vertical and horizontal lead screw motors.