Car seat headrest

Abstract

The present invention discloses a car seat headrest, comprising a base; a support assembly rotatably mounted on the base, wherein the rotation centerline of the support assembly relative to the base is located in the middle and lower section of the support assembly; and a rotary drive assembly for driving the support assembly to rotate. The beneficial effects of the present invention are as follows: the rotary drive assembly drives the support assembly to rotate, and the upper portion of the support assembly can move back and forth in an inclined and deflecting manner, thereby achieving X-direction adjustment of the headrest. In this manner, the X-direction adjustment of the headrest is performed, and the movement process is a non-linear forward and backward movement. The forward and backward movement of the upper portion of the headrest is accompanied by a certain angle of deflection, which can match the forward and backward swinging posture of the human head, conforms to ergonomics, and significantly improves the comfort of the X-direction adjustment of the headrest.

Description

Technical Field

[0001] The invention relates to a comfort accessory for an automobile seat, in particular to a headrest for an automobile seat. Background Art

[0002] The headrest, a functional accessory mounted on the top of the seatback, plays a crucial role in ensuring occupant safety and comfort. To accommodate occupants of varying body shapes, current headrests are adjustable in height and fore-and-aft, a feature known in the industry as a "four-way" headrest.

[0003] In existing technology, the mechanisms for adjusting the headrest's height and fore-aft movement typically utilize rack-and-pinion transmissions and linear drive mechanisms with screw motors. When the headrest's forward and backward movement in the X-axis is controlled by a rack-and-pinion or screw motor, the movement is absolutely linear. However, the human head typically uses the cervical spine as a fulcrum during forward and backward movement, and this movement is accompanied by forward and backward deflection. Therefore, using traditional methods to drive the headrest's forward and backward movement in the X-axis does not fully support the head's fore-aft deflection in accordance with ergonomic principles, and there is room for further improvement in support comfort. Summary of the Invention

[0004] In view of this, the present invention provides a car seat headrest, aiming to improve the support comfort of the headrest when adjusted forward and backward.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A car seat headrest, the key of which is to include:

[0007] base;

[0008] A support assembly rotatably mounted on the base, wherein a rotation centerline of the support assembly relative to the base is located in a middle and lower section of the support assembly; and

[0009] The rotary drive assembly is used to drive the support assembly to rotate.

[0010] Preferably, the rotation drive assembly includes a first component fixedly mounted on a base, a second component rotatably mounted on a support assembly, and a first motor driving the second component to rotate. The support assembly is rotatably mounted on the first component through a support shaft, and the first component and the second component are both provided with teeth that engage with each other.

[0011] Preferably, the base has two groups of upwardly extending ears, and the inner sides of the two groups of ears facing each other are each fixed with a first component, the support assembly has a skeleton plate, and the lower part of the skeleton plate is provided with two groups of vertical support pieces extending backward, the support shaft is fixedly passed through the two groups of vertical support pieces, and the two ends of the support shaft are respectively rotatably supported in the two first components; the first motor power is connected with a first rotating shaft, and the first rotating shaft is rotatably passed through the two groups of vertical support pieces, and the two ends of the first rotating shaft are each fixed with a second component.

[0012] Preferably, the first component and the second component are both gears, wherein a rectangular positioning block is provided at the axial outer end of the first component, and a positioning groove matching the rectangular positioning block is provided on the support ear.

[0013] Preferably, the support assembly includes a support body and a headrest shell slidably mounted on the front side of the support body in the height direction, and a lifting drive assembly is provided between the headrest shell and the support body for driving the headrest shell to slide up and down relative to the support body.

[0014] Preferably, slide grooves along the vertical direction are provided on both sides of the support body, and an avoidance gap is provided on one side of the slide groove. Slide columns extending along the vertical direction are provided on both sides of the headrest shell. The slide columns are installed in the slide grooves for sliding up and down in a one-to-one correspondence. A rack is provided on one side of the slide column. The lifting drive assembly includes a second rotating shaft rotatably assembled on the support body, gears fixed at both ends of the second rotating shaft, and a second motor that drives the second rotating shaft to rotate. The gear is located in the avoidance gap and meshes with the rack.

[0015] Preferably, the upper portion of the chute is exposed to the top of the supporting body in an open posture.

[0016] Preferably, the rear portion of the headrest shell is provided with two sets of side baffles located on the sides of the support body, the rack and the slide column are integrally formed on the inner side of the side baffles, and the side baffles are provided with operating holes at positions corresponding to the gears.

[0017] Preferably, both ends of the headrest shell have side wings that are inclined and bent forward, and the support assembly further includes a rear cover that is buckled on the rear side of the headrest shell, and the front edge of the rear cover is in contact with the rear edge of the side wings.

[0018] Preferably, a motor bracket extending backward is installed on the rear side of the skeleton plate, and the first motor is fixed on the motor bracket.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. With the automotive seat headrest provided by the present invention, a rotary drive assembly drives the support assembly to rotate, allowing the upper portion of the support assembly to move back and forth in a tilting and yaw manner, achieving X-axis adjustment of the headrest. This X-axis adjustment method utilizes a non-linear forward and backward movement, with the upper portion of the headrest exhibiting a certain degree of yaw during forward and backward movement. This ergonomic design significantly enhances the comfort of X-axis adjustment.

[0021] 2. By using the car seat headrest provided by the present invention, the lifting drive assembly drives the headrest shell to slide up and down relative to the support body, thereby adjusting the headrest support height, so that the headrest also integrates the Z-direction lifting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of a car seat headrest;

[0023] Figure 2 This is a schematic diagram of the exploded structure of a car seat headrest;

[0024] Figure 3 is a cross-sectional view of a car seat headrest;

[0025] Figure 4 This is a schematic diagram of the internal structure of a car seat headrest;

[0026] Figure 5 A partial schematic diagram showing the internal structure of the car seat headrest (the support component 2 only retains the skeleton plate 2a). DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0028] like Figure 1 、 2As shown in Figure 3, a car seat headrest mainly involves a base 1, a support assembly 2, a rotation drive assembly 3 and a lifting drive assembly 4. Among them, the base 1 is a metal component, on which two headrest rods 1b are connected. The two headrest rods 1b of the base 1 can be installed on the top of the seat back. The support assembly 2 is the part of the headrest responsible for supporting the head. The support assembly 2 is assembled on the base 1 through the support shaft a. The rotation drive assembly 3 is used to drive the support assembly 2 to rotate with the support shaft a as the rotation center. The support shaft a is located in the middle and lower section of the support assembly 2, that is, the rotation center line of the support assembly 2 relative to the base 1 is located in the middle and lower section of the support assembly 2. Based on this, the forward and backward adjustment process of the headrest X is: the rotation drive assembly 3 drives the support assembly 2 to rotate, and the upper part of the support assembly 2 moves forward and backward in a tilting and swinging manner, thereby adjusting the front and rear support distance of the headrest. This method is used to adjust the headrest forward and backward in the X direction. The movement process is a non-linear forward and backward movement. The upper part of the headrest moves forward and backward with a certain angle of deviation, which can match the forward and backward swinging posture of the human head. It is ergonomic and significantly improves the comfort of the headrest's X-direction adjustment.

[0029] In this embodiment, the support shaft a is located in the middle and lower section of the support assembly 2, specifically, the middle position, the lower end position, and any position between the middle and the lower end.

[0030] Please refer to the attached Figure 2 As shown, the support assembly 2 of this embodiment includes a support body 2b, a frame plate 2a located inside the support body 2b, a headrest shell 2c located in front of the support body 2b, and a rear cover 2d located behind the support body 2b.

[0031] Please refer to the attached Figure 4 and 5 As shown, the rotation drive assembly 3 includes a first component 3a fixedly mounted on the base 1, a second component 3b rotatably mounted on the support assembly 2, and a first motor 3c capable of driving the second component 3b to rotate. A support shaft a is fixedly provided in the lower portion of the support assembly 2, and the support shaft a is rotatably mounted on the first component 3a. The first component 3a and the second component 3b are both provided with mutually meshing teeth. Based on this, when the first motor 3c drives the second component 3b to rotate, the second component 3b rotates around the tooth profile of the first component 3a due to the meshing of the teeth of the first component 3a and the second component 3b. In other words, the support assembly 2 rotates with the support shaft a as the rotation center, thereby achieving X-direction adjustment of the headrest belt's yaw motion. The first component 3a and the second component 3b can be arc-shaped tooth plates or cylindrical gears.

[0032] In this embodiment, the number of the first component 3a and the second component 3b are both two. To facilitate product assembly, please refer to the attached Figure 4 and 5The base 1 has two sets of upwardly extending lugs 1a, with two first components 3a fixedly mounted on the opposing inner sides of the two sets of lugs 1a. The lower portion of the framework plate 2a of the support assembly 2 is equipped with two sets of rearwardly extending vertical support plates 2a1, symmetrically arranged between the two sets of lugs 1a. A support shaft a is fixedly mounted through the two sets of vertical support plates 2a1. The two first components 3a are cylindrical gears with central through-holes, with the ends of the support shaft a rotatably supported within the central through-holes of the two cylindrical gears. A first rotating shaft 3d is also rotatably mounted through the rear ends of the two sets of vertical support plates 2a1. The two second components 3b are also cylindrical gears, fixedly mounted on the ends of the first rotating shaft 3d. A rearwardly extending motor bracket 2e is also mounted on the rear side of the framework plate 2a. A first motor 3c is fixed to the motor bracket 2e. The first motor 3c is an integrated reduction motor, with its power output portion rotatably connected to the first rotating shaft 3d.

[0033] With the above specific design, the integrated reduction motor can drive the headrest to perform X-axis adjustment smoothly, and the first component 3a and the second component 3b are installed in the space surrounded by the ear 1a and the vertical support plate 2a1, which has many advantages such as transmission reliability, smooth movement, low noise, and high compactness. Figure 2 It can be seen that the support body 2b is composed of a first half cover d and a second half cover c located on the front and rear sides. The two can independently wrap the rotation drive component 3 and the lifting drive component 4 inside the headrest support component 2, ensuring that the product has better structural integrity and compactness after assembly.

[0034] In this embodiment, please refer to the attached Figure 5 A rectangular positioning block 3a1 is provided at the axial outer end of the first component 3a, and a positioning groove 1a1 matching the rectangular positioning block 3a1 is provided on the ear 1a. The first component 3a can be fixedly assembled by embedding the rectangular positioning block 3a1 into the positioning groove 1a1.

[0035] For example Figure 2 and 3 As shown, the headrest shell 2c is slidably mounted on the front side of the support body 2b in the height direction, and the lifting drive assembly 4 is used to drive the headrest shell 2c to slide up and down relative to the support body 2b, so that the headrest has a Z-axis height adjustment function.

[0036] Further, from the attached Figure 2 It can be seen that the two sides of the support body 2b are provided with a slide groove 2b1 extending in the vertical direction, and a relief notch 2b2 is provided on one side of the slide groove 2b1. The two sides of the headrest shell 2c are provided with a slide column 2c1 extending in the vertical direction. The slide column 2c1 is installed in the slide groove 2b1 on both sides of the support body 2b in a one-to-one correspondence and slides up and down. A rack 2c2 is provided on the front side of the slide column 2c1. Figure 5As can be seen, the lifting drive assembly 4 comprises a second shaft 4a rotatably mounted on the frame plate 2a, gears 4b secured at both ends of the second shaft 4a, and a second motor 4c driving the second shaft 4a. Gear 4b meshes with the rack 2c2 and is located within the clearance notch 2b2. Consequently, the second motor 4c drives the gear 4b, which, in turn, meshes with the rack 2c2, allowing the headrest housing 2c to slide up and down relative to the support body 2b, thereby achieving Z-axis height adjustment of the headrest.

[0037] From the attached Figure 2 As can be seen, the upper portion of the slide groove 2b1 is exposed at the top of the support body 2b, with the clearance notch 2b2 located near the front of the slide groove 2b1. The rear of the headrest housing 2c is equipped with two sets of side panels 2c3, located on the sides of the support body 2b. The rack 2c2 and the slide post 2c1 are integrally formed inside the side panels 2c3. The side panels 2c3 have an operating hole 2c4 corresponding to the position of the gear 4b. This design allows assembly to be completed by inserting the slide post 2c1 of the headrest housing 2c from top to bottom into the slide groove 2b1, and then inserting the gear 4b into the clearance notch 2b2 through the operating hole 2c4, offering the technical advantage of convenient installation.

[0038] like Figure 1 As shown, the headrest housing 2c has symmetrically curved, forward-facing wings 2c5 at both ends, enhancing the headrest's support and comfort. A rear cover 2d snaps onto the rear side of the headrest housing 2c, with the front edge of the rear cover 2d aligning with the rear edges of the wings 2c5, enclosing all internal components of the headrest, enhancing its compactness and aesthetic quality.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.

Claims

1. A car seat headrest, characterized in that: include: Base (1); A support assembly (2) is rotatably mounted on the base (1), wherein a rotation centerline of the support assembly (2) relative to the base (1) is located at a middle and lower section of the support assembly (2); and A rotary drive assembly (3) for driving the support assembly (2) to rotate, the rotary drive assembly (3) comprising a first component (3a) fixedly mounted on the base (1), a second component (3b) rotatably mounted on the support assembly (2), and a first motor (3c) for driving the second component (3b) to rotate, the support assembly (2) being rotatably mounted on the first component (3a) via a support shaft (a), the first component (3a) and the second component (3b) both being provided with teeth that mesh with each other; The base (1) has two groups of upwardly extending ears (1a), and the inner sides of the two groups of ears (1a) facing each other are each fixed with a first component (3a); the support assembly (2) has a skeleton plate (2a), and the lower part of the skeleton plate (2a) is provided with two groups of vertical support plates (2a1) extending backward; the support shaft (a) is fixedly arranged on the two groups of vertical support plates (2a1), and the two ends of the support shaft (a) are respectively rotatably supported in the two first components (3a); the first motor (3c) is connected to the first rotating shaft (3d), and the first rotating shaft (3d) is rotatably arranged on the two groups of vertical support plates (2a1), and the two ends of the first rotating shaft (3d) are each fixedly sleeved with a second component (3b); the first component (3a) and the second component (3b) are installed in the space surrounded by the ears (1a) and the vertical support plates (2a1).

2. The car seat headrest according to claim 1, characterized in that: The first component (3a) and the second component (3b) are both gears, wherein a rectangular positioning block (3a1) is provided at the axial outer end of the first component (3a), and a positioning groove (1a1) matching the rectangular positioning block (3a1) is provided on the support ear (1a).

3. The car seat headrest according to claim 1, characterized in that: The support assembly (2) comprises a support body (2b) and a headrest shell (2c) slidably mounted on the front side of the support body (2b) in the height direction; a lifting drive assembly (4) is provided between the headrest shell (2c) and the support body (2b) for driving the headrest shell (2c) to slide up and down relative to the support body (2b).

4. The car seat headrest according to claim 3, characterized in that: The support body (2b) is provided with a slide groove (2b1) along the vertical direction on both sides, and an avoidance gap (2b2) ​​is provided on one side of the slide groove (2b1). The headrest shell (2c) is provided with a slide column (2c1) extending along the vertical direction on both sides, and the slide column (2c1) is installed in the slide groove (2b1) in a one-to-one sliding manner. A rack (2c2) is provided on one side of the slide column (2c1). The lifting drive component (4) includes a second rotating shaft (4a) rotatably assembled on the support body (2b), a gear (4b) fixed at both ends of the second rotating shaft (4a), and a second motor (4c) driving the second rotating shaft (4a) to rotate, and the gear (4b) is located in the avoidance gap (2b2) ​​and meshes with the rack (2c2).

5. The car seat headrest according to claim 4, characterized in that: The upper portion of the slide groove (2b1) is exposed on the top of the supporting body (2b) in an open posture.

6. The car seat headrest according to claim 5, characterized in that: The rear portion of the headrest shell (2c) is provided with two sets of side baffles (2c3) located on the side of the support body (2b); the rack (2c2) and the slide column (2c1) are integrally formed on the inner side of the side baffle (2c3); and the side baffle (2c3) is provided with an operating hole (2c4) at a position corresponding to the gear (4b).

7. The car seat headrest according to claim 4, characterized in that: Both ends of the headrest shell (2c) have side wings (2c5) that are inclined and bent forward. The support assembly (2) also includes a rear cover (2d) that is buckled on the rear side of the headrest shell (2c), and the front edge of the rear cover (2d) is in contact with the rear edge of the side wings (2c5).

8. The car seat headrest according to claim 1, characterized in that: A motor bracket (2e) extending backward is installed on the rear side of the skeleton plate (2a), and the first motor (3c) is fixed on the motor bracket (2e).

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