Headrest and car seat

Abstract

The utility model discloses a headrest and car seat, characterized in that: the headrest is installed with at least two headrest poles, the bottom of headrest pole is set in the bottom below of headrest, the headrest can move up and down relative to headrest pole, the headrest is equipped with the headrest up and down drive portion of driving headrest along headrest pole and moves up and down, the headrest up and down drive portion includes first headrest motor and first headrest gear, at least one headrest pole is equipped with headrest pole rack, headrest pole rack is along the length direction arrangement of headrest pole, first headrest gear is engaged with headrest pole rack, first headrest motor drives first headrest gear rotation, and through headrest pole rack drives headrest and moves up and down relative to headrest pole. The utility model improves the convenience of maintenance, and also is convenient for the increase of car seat function.

Description

Technical Field

[0001] This utility model relates to a seat, and more particularly to a headrest and a car seat. Background Technology

[0002] Car seats are an essential feature of car interiors and the most direct reflection of whether a car owner feels comfortable in the vehicle. The main factor affecting seat comfort is the ergonomic design of the seat.

[0003] Power seats are a common type of car seat, and headrests are an essential component. Common power seat headrests feature height adjustment to accommodate different passengers. There are two main methods for adjusting the headrest height:

[0004] The first type is manual adjustment. It features a buckle on the backrest, with the headrest rod at the bottom inserted into the backrest. The buckle then holds the headrest rod in place. To adjust, the user presses the buckle and pulls the headrest rod. After movement, releasing the buckle locks the headrest rod in place, thus adjusting the headrest height. This type of adjustment is manual and inconvenient.

[0005] The second type is electrically adjustable. In this structure, a motor is installed inside the backrest to drive the headrest up and down, thus achieving height adjustment. This structure has the following drawbacks: Since the backrest supports the back and waist, and as a multi-functional electric seat, the backrest will have functions such as lumbar adjustment, heating, and possibly massage. Because the backrest needs to fulfill more functions, if the headrest drive motor is installed inside the backrest, the internal space layout may be insufficient to accommodate all functions, or some functional components may not be able to be placed. Furthermore, if the motor fails, the entire backrest or seat needs to be removed from the vehicle, and the backrest needs to be disassembled for repair, which is difficult and costly. Therefore, solving these technical problems is a direction that those skilled in the art need to address. Summary of the Invention

[0006] The purpose of this utility model is to provide a headrest and a car seat. By using this structure, the space occupied inside the backrest is reduced, the layout of the backrest is facilitated, the comfort of the headrest is improved, and the maintenance difficulty is reduced.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a headrest, wherein at least two headrest rods are installed inside the headrest, the bottom of the headrest rods is located below the bottom of the headrest, and the headrest can move up and down relative to the headrest rods;

[0008] The headrest is provided with a headrest up-and-down driving part that drives the headrest to move up and down along the headrest rod. The headrest up-and-down driving part includes a first headrest motor and a first headrest gear. At least one headrest rod is provided with a headrest rod rack. The headrest rod rack is arranged along the length direction of the headrest rod. The first headrest gear meshes with the headrest rod rack. The first headrest motor drives the first headrest gear to rotate, and the headrest moves up and down relative to the headrest rod through the headrest rod rack.

[0009] In the above technical solution, there are two headrest rods, which are spaced apart, and each headrest rod is provided with a headrest rod rack;

[0010] There are two first headrest gears, and each first headrest rod gear meshes with a headrest rod rack.

[0011] It is also provided with a first headrest gear connecting rod, the two ends of which are respectively connected to two first headrest gears, and the first headrest gear connecting rod is rotatably connected to the headrest. The first headrest motor drives the first headrest gear connecting rod to rotate, and at the same time drives the two first headrest gears to rotate.

[0012] In the above technical solution, the headrest includes a rear headrest portion and a front headrest portion. The rear headrest portion is mounted on the headrest rod. The top rear side of the front headrest portion is rotatably connected to the top front side of the rear headrest portion. The headrest up-down drive portion is mounted inside the rear headrest portion.

[0013] The rear headrest portion is also provided with a headrest rotation drive portion that drives the front headrest portion to rotate around the rear headrest portion.

[0014] In the above technical solution, the headrest rotation drive unit includes a second headrest motor, a second headrest gear, and a headrest pushing component. The second headrest motor is installed inside the rear headrest portion, and the headrest pushing component is longitudinally movably installed inside the rear headrest portion. The headrest pushing component is connected to the front headrest portion via a headrest connector. The headrest pushing component is provided with a longitudinal rack that meshes with the second headrest gear. The second headrest motor drives the second headrest gear to rotate, and the headrest pushing component and the headrest connector drive the front headrest portion to rotate relative to the rear headrest portion.

[0015] In the above technical solution, the headrest rotation drive unit includes a second headrest motor, a second headrest gear, and a headrest pushing component. The second headrest motor is installed inside the rear headrest portion, and the headrest pushing component is longitudinally movably installed inside the rear headrest portion. The headrest pushing component is provided with a longitudinal rack that meshes with the second headrest gear. The second headrest motor drives the second headrest gear to rotate and drives the headrest pushing component to move back and forth.

[0016] The headrest is equipped with a stop mechanism. When the headrest pushing component moves back and forth, the stop mechanism causes the front headrest part to rotate around the rear headrest part.

[0017] In the above technical solution, the front headrest includes a central headrest and two side headrests. The top rear end of the central headrest is rotatably connected to the front top of the rear headrest. The two side headrests are symmetrically arranged on both sides of the central headrest. The inner end of each side headrest is rotatably connected to the side of the central headrest via a damping component. The headrest rotation drive unit drives the central headrest to rotate around the rear headrest.

[0018] In the above technical solution, a speaker is also provided inside the headrest.

[0019] This utility model also provides a car seat, including a seat cushion assembly and a backrest assembly. The backrest assembly includes a backrest and the aforementioned headrest, and the bottom of the headrest is connected to the top of the backrest via the headrest rod.

[0020] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0021] 1. In this utility model, a headrest up-and-down driving part is provided inside the headrest. The headrest is driven to move up and down relative to the headrest rod by the headrest up-and-down driving part. Compared with the previous structure in which the headrest up-and-down driving part is set in the backrest, it can reduce the space occupied by the backrest, facilitate the upgrading of the backrest function. At the same time, when the headrest up-and-down driving part needs to be repaired, only the headrest needs to be disassembled, which improves the convenience of maintenance and reduces the difficulty of maintenance.

[0022] 2. The headrest of this utility model includes a front headrest part and a rear headrest part. The front headrest part can rotate or move relative to the rear headrest part, so as to adjust the distance and tilt angle of the front headrest part relative to the rear headrest part, and improve the user's comfort according to the convenient position and angle of the headrest. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the headrest structure in Embodiment 1 of this utility model;

[0024] Figure 2This is a schematic diagram of the headrest structure in Embodiment 1 of this utility model (showing the internal structure of the rear headrest section);

[0025] Figure 3 yes Figure 2 A cross-sectional view of the structure (the cross-sectional view of the connection between the first headrest gear and the headrest rack);

[0026] Figure 4 yes Figure 2 A cross-sectional view of the structure (the cross-sectional view of the connection between the second headrest gear and the longitudinal rack);

[0027] Figure 5 This is a schematic diagram of the headrest structure in Embodiment 1 of this utility model (with some internal structures of the rear headrest not shown in the display state).

[0028] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure;

[0029] Figure 7 This is a schematic diagram of the connection between the gear shifter and the front headrest in Embodiment 1 of this utility model (showing the front headrest portion);

[0030] Figure 8 This is a structural schematic diagram of the car seat in Embodiment 1 of this utility model.

[0031] The components include: 1. Seat cushion assembly; 2. Backrest assembly; 22. Backrest; 23. Headrest; 24. Headrest rod; 230. Headrest up-and-down drive unit; 231. Rear headrest part; 232. Front headrest part; 233. Headrest rotation drive unit; 234. Gear shifter; 240. Headrest rod rack.

[0032] 2301, First headrest motor; 2302, First headrest gear; 2303, First headrest gear connecting rod; 2320, Middle headrest; 2321, Side headrest; 2331, Second headrest motor; 2332, Second headrest gear; 2333, Headrest pushing component; 2334, Longitudinal rack; 2335, Second headrest gear connecting rod; 2340, Pushing component; 2341, Arc-shaped rack; 2342, Tension spring; 2343, Reset component; 2344, Pushing tooth; 2345, Convex tooth; 2346, Disengagement ramp. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] Example 1: See Figure 1-8As shown, a headrest also includes at least two headrest rods 24, the top of the headrest rods 24 being connected to the headrest 23, the bottom of the headrest rods 24 being disposed below the bottom of the headrest 23, and the headrest 23 being able to move up and down relative to the headrest rods 24;

[0035] The headrest 23 is provided with a headrest up-down driving part 230 for driving the headrest 23 to move up and down along the headrest rod 24. The headrest up-down driving part 230 includes a first headrest motor 2301 and a first headrest gear 2302 installed in the headrest 23. At least one headrest rod 24 is provided with a headrest rod rack 240. The headrest rod rack 240 is arranged along the length direction of the headrest rod 24. The first headrest gear 2302 meshes with the headrest rod rack 240. The first headrest motor 2301 drives the first headrest gear 2302 to rotate, and the headrest 23 moves up and down relative to the headrest rod 24 via the headrest rod rack 240.

[0036] See Figure 8 As shown, the present invention also provides an automobile seat, including a seat cushion assembly 1 and a backrest assembly 2. The backrest assembly 2 includes a backrest 22 and the aforementioned headrest 23. The bottom of the headrest 23 is connected to the top of the backrest 22 via the headrest rod 24.

[0037] In this embodiment, the headrest is mounted on the backrest via a headrest rod. A headrest up-and-down drive unit is located inside the headrest, driving it to move up and down along the headrest rod. This structure reduces the space occupied inside the backrest, allowing for easier layout of other components, such as a lumbar support adjustment mechanism and a lumbar massage mechanism, thus enabling the backrest to have more functions. When the headrest height relative to the backrest needs adjustment, the first headrest motor operates, driving the first headrest gear to rotate. Since the first headrest gear meshes with the headrest rod rack on the headrest rod, it can drive the headrest to move up and down relative to the backrest, achieving headrest height adjustment. Furthermore, the use of at least two headrest rods restricts the headrest, preventing rotation relative to the backrest and ensuring stable up-and-down movement of the headrest relative to the backrest when height adjustment is required.

[0038] Preferably, in this embodiment, the headrest rod is made of metal, with its bottom and backrest fixed together. The headrest rod rack is a separate component, detachably mounted on the headrest rod. It can be made of plastic or metal. The headrest rod and headrest rod rack are machined separately and then assembled. This method facilitates production. Furthermore, since the first headrest gear meshes with the headrest rod rack when the headrest is adjusted up and down, potentially causing damage to the rack, this method also facilitates maintenance and replacement, reducing maintenance and replacement costs. In this embodiment, a headrest groove is provided inside the headrest to mate with the headrest rod. The headrest slides through the groove to ensure the stability and smoothness of the headrest's up and down movement, preventing jamming.

[0039] See Figure 1-4 As shown, there are two headrest rods 24, which are spaced apart, and each headrest rod 24 is provided with a headrest rod rack 240;

[0040] There are two first headrest gears 2302, and each first headrest rod gear 2302 meshes with a headrest rod rack 240.

[0041] The device also includes a first headrest gear connecting rod 2303, with its two ends connected to two first headrest gears 2302 respectively. The first headrest gear connecting rod 2303 is rotatably connected to the headrest 23. The first headrest motor 2301 drives the first headrest gear connecting rod 2303 to rotate, and simultaneously drives the two first headrest gears 2302 to rotate.

[0042] In this embodiment, both headrest rods are equipped with headrest rod racks, and two first headrest gears are used. When the first headrest motor drives the first headrest gear connecting rod to rotate, it synchronously drives the two first headrest gears to rotate, thereby driving the headrest to move relative to the two headrest rods at the same time, adjusting the height of the headrest relative to the backrest. Moreover, the arrangement of two first headrest gears and two headrest rod racks ensures that the headrest is driven by the height adjustment force on both sides when adjusting the height, making the up-and-down movement of the headrest more stable. This prevents the problem of uneven sliding and jamming of the headrest caused by unilateral force (if only one first headrest gear and one headrest rod rack are used), ensuring the smoothness and stability of the headrest movement, and also reducing the problem of easy wear on one side of the headrest due to unilateral force, resulting in a high maintenance rate.

[0043] See Figure 1-5As shown, the headrest 23 includes a rear headrest portion 231 and a front headrest portion 232. The rear headrest portion 231 is mounted on the headrest rod 24. The top rear side of the front headrest portion 232 is rotatably connected to the top front side of the rear headrest portion 231. The headrest up and down driving part 230 is installed inside the rear headrest portion 231.

[0044] The rear headrest portion 231 is further provided with a headrest rotation drive portion 233 that drives the front headrest portion 232 to rotate around the rear headrest portion 231.

[0045] In this embodiment, the headrest comprises a rear headrest section and a front headrest section. The front headrest section can rotate around the rear headrest section. The front headrest section supports and cushions the passenger's head and neck. When the headrest's up-and-down drive unit operates, it causes the rear headrest section to move up and down relative to the headrest rod. Since the front and rear headrest sections are rotatably connected, the up-and-down movement of the rear headrest section simultaneously drives the up-and-down movement of the front headrest section. When it is necessary to adjust the headrest's position or angle, the headrest rotation drive unit drives the front headrest section to rotate around the rear headrest section. This allows adjustment of the distance between the bottom front end of the front headrest section and the rear headrest section, thereby adjusting the tilt angle and position of the front end face of the front headrest section to support the passenger's head at the most comfortable angle.

[0046] In this utility model, the headrest rotation drive unit has several structures. The first type includes a second headrest motor, a second headrest gear, and a headrest pushing component. The second headrest motor is installed inside the rear headrest portion. The headrest pushing component is longitudinally movably installed inside the rear headrest portion and is connected to the front headrest portion via a headrest connector. The headrest pushing component is provided with a longitudinal rack that meshes with the second headrest gear. The second headrest motor drives the second headrest gear to rotate, and the headrest pushing component and the headrest connector drive the front headrest portion to rotate relative to the rear headrest portion.

[0047] In this structure, the headrest pushing component is located in front of the second headrest motor, the second headrest gear, and the upper and lower drive parts of the headrest. There are two longitudinal racks, which are spaced apart, preferably spaced left and right. There are two second headrest gears, each of which meshes with one longitudinal rack. A second headrest gear connecting rod is also provided, with the two second headrest gears connected to both ends of the connecting rod. The two ends of the connecting rod are rotatably connected to the rear headrest. The Dürer headrest motor drives the connecting rod to rotate, which in turn drives the two second headrest gears to rotate simultaneously. Through the meshing of the second headrest gears with the longitudinal gears, the headrest pushing component is moved back and forth. In this structure, the headrest pushing component includes a headrest pushing plate and two headrest connecting rods. A longitudinal rack is mounted on the headrest pushing plate, and the two headrest connecting rods are spaced apart. The front end of each connecting rod is rotatably connected to the front headrest section, and the rear end is rotatably connected to the headrest pushing plate. This allows the headrest pushing plate to move back and forth, pushing the bottom of the front headrest section forward and backward via the connecting rods, thus causing the front headrest section to rotate relative to the rear headrest section. The connecting rods are positioned below the rotatable connection between the front and rear headrest sections, thus minimizing interference with the rotation of the front headrest section relative to the rear headrest section. In this structure, the headrest pushing component can be positioned at any point, allowing the front headrest section to rotate to any position to support the passenger's head.

[0048] The second structure of the headrest rotation drive unit is (this structure is preferred in this invention, therefore, this structure is used in this embodiment): See Figure 2-5 As shown, the headrest rotation drive unit includes a second headrest motor 2331, a second headrest gear 2332, and a headrest pushing component 2333. The second headrest motor 2331 is installed inside the rear headrest portion 231, and the headrest pushing component 2333 is longitudinally movably installed inside the rear headrest portion 231. The headrest pushing component 2333 is provided with a longitudinal rack 2334 that meshes with the second headrest gear 2332. The second headrest motor 2331 drives the second headrest gear 2332 to rotate and drives the headrest pushing component 2333 to move back and forth.

[0049] The headrest 23 is equipped with a stop device 234. When the headrest pushing component 2333 moves back and forth, the stop device 234 drives the front headrest part 232 to rotate around the rear headrest part 231.

[0050] In this structure, the headrest pushing component is located in front of the second headrest motor, the second headrest gear, and the upper and lower drive parts of the headrest. There are two longitudinal racks, which are spaced apart, preferably spaced left and right. There are two second headrest gears, each of which meshes with one longitudinal rack. A second headrest gear connecting rod 2335 is also provided. The two second headrest gears are connected to the two ends of the second headrest gear connecting rod, which is rotatably connected to the rear headrest part. The second headrest motor drives the second headrest gear connecting rod to rotate, thereby simultaneously driving the two second headrest gears to rotate. Through the meshing of the second headrest gears with the longitudinal gears, the headrest pushing component is pushed to move back and forth.

[0051] In this method, since the headrest pushing component is not directly connected to the front headrest, a stop mechanism is used to connect the headrest pushing component to the front headrest, thereby driving the rotation of the front headrest. Simultaneously, the stop mechanism ensures that after the front headrest is pushed to the appropriate position, it remains stably supported, guaranteeing safety and comfort. In this embodiment, the stop mechanism 234 includes a pusher 2340, an arc-shaped rack 2341, a tension spring 2342, and a reset component 2343 (a tension spring may not be used). The reset component uses a reset spring or other structure with elastic reset force. There are two arc-shaped racks (or one arc-shaped rack), spaced apart horizontally. The front end of the arc-shaped rack connects to the bottom rear side of the front headrest. The rear end of the tension spring is attached to the rear headrest, and the front end is attached to the bottom of the front headrest. The tension spring always provides a backward pulling force to the bottom of the front headrest. The rear end of the arc-shaped rack is inserted into the rear headrest. The middle part of the pusher is rotatably connected to the front side below the headrest pushing component. The bottom of the pusher has two push teeth 2344 that can respectively mesh with the two arc-shaped racks. The reset member and the top of the pusher are located in front of the headrest pushing component. One end of the reset member is connected to the top of the pusher, and the other end is connected to the front end of the headrest pushing component. The reset member provides a forward thrust to the top of the pusher, causing the pusher to rotate around the headrest pushing component, so that the top of the pusher moves away from the front side of the headrest pushing component and the push teeth abut against the lower front side wall of the headrest pushing component.

[0052] The pusher has an arc-shaped bottom surface, and the top surface of the arc-shaped rack has multiple protrusions 2345 spaced from front to back. The pusher is positioned between adjacent protrusions on the arc-shaped rack. In the initial state, the pusher is in front of the foremost protrusion. When it is necessary to push the bottom of the front headrest away from the rear headrest, the second headrest motor drives the headrest pushing component and the pushing member to move backward through the second headrest gear and the longitudinal rack. During this process, the arc-shaped bottom surface of the pusher contacts the protrusion, and the protrusion squeezes the pusher. Due to the presence of the reset component, the pushing member rotates around the headrest pushing component (the bottom of the pushing member rotates forward, and the top rotates backward), compressing the reset component and allowing the pusher to move backward through the protrusion to between two adjacent protrusions on the rear side. When the pusher moves to between two adjacent protrusions on the rear side, due to the presence of the reset component, the bottom of the pushing member rotates backward, and the top rotates forward, causing the pusher to enter between the two protrusions and abut against the rear side wall of the front protrusion. Then, the pushing component... Moving forward simultaneously causes the pusher to move forward as well. The pusher teeth then push the arc-shaped rack forward, causing the bottom of the front headrest to rotate forward. This causes the top of the front headrest to rotate around the rear headrest, moving one tooth pitch at a time (this can also be the length between two or three teeth, or more: one tooth pitch is the length between two adjacent teeth). If a greater distance is needed, the headrest pusher moves the arc-shaped rack forward a certain distance, then continues to move backward a predetermined distance. Because the pusher exerts downward pressure on the arc-shaped rack as it moves backward, and this downward pressure is greater than the tension of the spring, the arc-shaped rack will not move. Once the pusher teeth enter behind one rear tooth, they restrict the arc-shaped rack from moving backward. Then, the headrest pusher continues to move the pusher forward, causing the bottom of the front headrest to move forward. This cycle continues until the optimal or desired adjustment position is reached. The maximum rotation angle of the front headrest is when the push tooth engages behind the last protruding tooth. Alternatively, when the headrest pushing component moves backward, it directly moves the push tooth to the rear of the last protruding tooth, and then, as needed, moves the headrest pushing component forward a predetermined distance. The arc-shaped push tooth is coaxially positioned with the rotating connection between the pusher and the headrest pushing component, ensuring that the distance between the push tooth and each protruding tooth is equal when they contact each other.

[0053] In this embodiment, a release ramp 2346 is provided on the rear side below the pusher. This release ramp slopes downwards from front to back. When the front headrest needs to be reset, i.e., the pusher teeth disengage, the tension spring pulls the bottom of the front headrest backwards towards the rear headrest. The second headrest motor drives the headrest pushing component and the pusher to move backwards, so that the release ramp contacts the rear headrest and continues to move backwards a certain distance. The rear headrest continues to press against the release ramp (the rear headrest has a release member facing the release ramp, which holds the release ramp in place), and the pusher teeth at the bottom of the pusher completely disengage from the convex teeth of the arc-shaped rack. At this time, the pusher teeth will not exert downward pressure on the arc-shaped rack, nor will they restrict its backward movement. Due to the presence of the tension spring, the restoring force of the tension spring will pull the front headrest backwards to reset. Of course, the tension spring can also be omitted, and when the passenger's head rests on the front headrest, the resistance of the head pushes the front headrest backwards. In this structure, the presence of the shift mechanism ensures that the front headrest remains stably positioned after adjustment, guaranteeing comfort and stability during use. In this invention, the shift mechanism can also be other existing, conventional shift mechanisms (such as the shift mechanism structures in application numbers "202322213116.0, 202421950357.1", or similar structures), without using the aforementioned shift mechanism structure, as long as the front headrest is stably limited. Alternatively, the first structure can be used, without employing a shift mechanism.

[0054] As another embodiment, the part adopts a headrest rotation drive unit, which adopts: the rear headrest part is also provided with a headrest forward and backward movement drive unit to drive the front headrest to move back and forth relative to the rear headrest. If a headrest forward and backward movement drive unit is used, the front headrest is not rotatably connected to the rear headrest. The front headrest is located on the front side of the rear headrest, and the two are independent of each other. The headrest forward and backward movement drive unit includes a second headrest motor, a second headrest gear, and a headrest pushing component. The second headrest motor is installed inside the rear headrest. The headrest pushing component is longitudinally movably installed inside the rear headrest, and the headrest pushing component is connected to the front headrest via a headrest connector, or the rear end of the headrest pushing component is longitudinally movably connected to the rear headrest, and the front end of the headrest pushing component passes through the rear headrest and connects to the front headrest. The headrest pushing component is provided with a longitudinal rack that meshes with the second headrest gear. The second headrest motor drives the second headrest gear to rotate, and through the headrest pushing component and the headrest connector, drives the front headrest to move forward and backward relative to the rear headrest. Its working principle is similar to that of Embodiment 1, except that the front side of the front headrest cannot be tilted. Of course, this structure is less aesthetically pleasing. Therefore, in this embodiment, a headrest rotation drive unit is used.

[0055] See Figure 1As shown, the front headrest portion 232 includes a central headrest 2320 and two side headrests 2321. The top rear end of the central headrest 2320 is rotatably connected to the front top of the rear headrest portion 231. The two side headrests 2321 are symmetrically arranged on both sides of the central headrest 2320. The inner ends of the two side headrests 2321 are rotatably connected to both sides of the central headrest 2320 via damping components. The headrest rotation drive unit 233 drives the central headrest 2320 to rotate around the rear headrest portion 231.

[0056] In this embodiment, the damping component preferably adopts a damping hinge with a damping force of 30N-65N. Preferably, the damping force when the outer end of the side headrest rotates forward is about 30N-35N, and the damping force when the side headrest rotates towards the rear headrest is about 60N-65N. In this way, the damping force of the damping component is different when rotating in the two directions. When the outer end of the side headrest rotates towards the middle headrest (when the outer end of the side headrest moves away from the rear headrest), the angle formed between the two side headrests is reduced, which plays a role in wrapping. In this way, the headrest can wrap around the head or wrap around and support the passenger's neck, making it less likely for the head and neck to fall off the headrest when the passenger is using it, especially when sleeping, thus improving comfort. Therefore, when the side headrest is rotated towards the middle headrest, the damping force is smaller, making it easier and less strenuous for the user to rotate the side headrest. When a passenger's head or neck rests against the rotated side headrest, the support force is transferred to the side headrest, and the reverse damping force is greater, which can prevent the side headrest from suddenly rotating towards the rear headrest, prevent the side headrest from unfolding during use, and improve the comfort and safety of use.

[0057] The headrest also contains a speaker, which can play music or other sounds, making it more functional.

[0058] In this embodiment, the front end of the arc-shaped rack and the front end of the tension spring are both connected to the central headrest. When the central headrest rotates around the rear headrest, the side headrests will rotate along with the central headrest because they are connected to the central headrest through a damping component (if a headrest connecting rod structure is used, the headrest connecting rod is connected to the central headrest).

[0059] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. In the description of the invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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. For instance, the two components can be mechanically connected by contact or abutting; they can also be directly hooked or connected by an intermediate medium; or they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A headrest, characterized in that: The headrest is equipped with at least two headrest rods, the bottom of which is located below the bottom of the headrest, and the headrest can move up and down relative to the headrest rods. The headrest is provided with a headrest up-and-down driving part that drives the headrest to move up and down along the headrest rod. The headrest up-and-down driving part includes a first headrest motor and a first headrest gear. At least one headrest rod is provided with a headrest rod rack. The headrest rod rack is arranged along the length direction of the headrest rod. The first headrest gear meshes with the headrest rod rack. The first headrest motor drives the first headrest gear to rotate, and the headrest moves up and down relative to the headrest rod through the headrest rod rack.

2. The headrest according to claim 1, characterized in that: There are two headrest rods, which are spaced apart, and each headrest rod is provided with a headrest rod rack; There are two first headrest gears, and each first headrest gear meshes with a headrest rack. It is also provided with a first headrest gear connecting rod, the two ends of which are respectively connected to two first headrest gears, and the first headrest gear connecting rod is rotatably connected to the headrest. The first headrest motor drives the first headrest gear connecting rod to rotate, and at the same time drives the two first headrest gears to rotate.

3. The headrest according to claim 1, characterized in that: The headrest includes a rear headrest portion and a front headrest portion. The rear headrest portion is mounted on the headrest rod. The top rear side of the front headrest portion is rotatably connected to the top front side of the rear headrest portion. The headrest up-down drive portion is installed inside the rear headrest portion. The rear headrest portion is also provided with a headrest rotation drive portion that drives the front headrest portion to rotate around the rear headrest portion.

4. The headrest according to claim 3, characterized in that: The headrest rotation drive unit includes a second headrest motor, a second headrest gear, and a headrest pushing component. The second headrest motor is installed inside the rear headrest portion. The headrest pushing component is longitudinally movably installed inside the rear headrest portion and is connected to the front headrest portion via a headrest connector. The headrest pushing component is provided with a longitudinal rack that meshes with the second headrest gear. The second headrest motor drives the second headrest gear to rotate, and the headrest pushing component and the headrest connector drive the front headrest portion to rotate relative to the rear headrest portion.

5. The headrest according to claim 3, characterized in that: The headrest rotation drive unit includes a second headrest motor, a second headrest gear, and a headrest pushing component. The second headrest motor is installed inside the rear headrest portion, and the headrest pushing component is longitudinally movably installed inside the rear headrest portion. The headrest pushing component is provided with a longitudinal rack that meshes with the second headrest gear. The second headrest motor drives the second headrest gear to rotate and drives the headrest pushing component to move back and forth. The headrest is equipped with a stop mechanism. When the headrest pushing component moves back and forth, the stop mechanism causes the front headrest part to rotate around the rear headrest part.

6. The headrest according to claim 3, characterized in that: The front headrest includes a central headrest and two side headrests. The top rear end of the central headrest is rotatably connected to the front top of the rear headrest. The two side headrests are symmetrically arranged on both sides of the central headrest. The inner end of each side headrest is rotatably connected to the side of the central headrest via a damping component. The headrest rotation drive unit drives the central headrest to rotate around the rear headrest.

7. The headrest according to claim 1, characterized in that: The headrest also contains a speaker.

8. A car seat, comprising a seat cushion assembly and a backrest assembly, characterized in that: The backrest assembly includes a backrest and a headrest as described in any one of claims 1-7, wherein the bottom of the headrest is connected to the top of the backrest via the headrest rod.

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