Adjustable seat headrest

Abstract

The present application relates to an adjustable seat headrest, comprising a headrest cover body; a base connected to a seat backrest, the headrest cover body being movable relative to the base; and an air bag provided between the headrest cover body and the base to drive the headrest cover body to move relative to the base. In the present application, by means of dividing a headrest assembly into a fixed portion and a movable portion, and cooperating with the air bag to push out the movable portion of the headrest assembly, automatic adjustment of the headrest can be achieved, comprising tilt adjustment, translation adjustment, side wing adjustment, etc. of the headrest, thereby facilitating operation and achieving good support; and compared with a pneumatic adjustment mode that simply pushes out a trim cover, a pneumatic adjustment mode of the present application provides a larger amount of support, thereby ensuring the comfort of adjustment.

Description

Adjustable seat headrest

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese application No. 202520114567.5, filed on January 17, 2025, the disclosure of which is incorporated herein in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of automobile seats, in particular to an adjustable seat headrest. BACKGROUND

[0004] With the improvement of consumers' requirements for the cabin environment, zero-pressure seats are increasingly used in vehicles. To ensure the safety of occupants in a zero-pressure posture, zero-pressure seats often use integrated seat belts installed on the seat, which greatly increases the height of the seat back. When the seat reaches a zero-pressure posture, an excessively high backrest can cause insufficient support for the occupant's upper back and head, leading to comfort problems. In addition, the development of car home theaters has led to more luxurious rear cabins, which are equipped with multimedia devices (projectors / screens) in the middle position. Passengers on both sides generally need to actively turn their bodies to watch, and the lack of sufficient head support reduces comfort. SUMMARY

[0005] To solve the above problems, the present application provides an adjustable seat headrest, which comprises a fixed part and a movable part by dividing the headrest assembly, and the movable part of the headrest assembly is pushed out by a gas bag. The headrest can be automatically adjusted, which is easy to operate, has good support, and has a larger support amount than the simple gas adjustment mode of the face cover, ensuring the comfort of adjustment.

[0006] The present application is implemented by the following scheme, an adjustable seat headrest, comprising: a headrest cover; a base connected to a seat back, the headrest cover being movable relative to the base; a gas bag disposed between the headrest cover and the base to drive the headrest cover to move relative to the base.

[0007] In some embodiments, the headrest cover comprises: a front cover cooperating with the base to form a cavity, the front cover being angularly movable relative to the base; and the gas bag is contained in the cavity to drive the front cover to adjust the angle relative to the base.

[0008] In some embodiments, the headrest cover further includes a rear cover that, together with the front cover, forms the cavity with the base. The rear cover is fixedly connected to the front cover, and the rear cover has an opening through which the base passes, so that the rear cover can move variably with the front cover relative to the base, passing over the base.

[0009] In some embodiments, the headrest cover includes: a front cover fixedly connected to the base; and side wings disposed on the left and right sides of the front cover, the side wings being variably movable relative to the front cover, and an air bag disposed between the base and the side wings to drive the side wings to adjust their angle relative to the base.

[0010] In some embodiments, the side wing includes a front ear piece and a rear ear piece fixedly connected to the front ear piece, the front ear piece being variably movable relative to the front cover; the air bag is disposed between the front ear piece and the base to drive the angle adjustment of the side wing relative to the base.

[0011] In some embodiments, the headrest cover includes: a front cover that forms a cavity with the base, the front cover being angularly movable relative to the base; and side wings disposed on the left and right sides of the front cover, the side wings being angularly movable relative to the front cover; the air bag includes a first air bag housed in the cavity to drive the front cover to adjust its angle relative to the base.

[0012] In some embodiments, the headrest further includes a first reset spring, one end of which is connected to the front cover and the other end of which is connected to the base.

[0013] In some embodiments, the headrest cover further includes a rear cover that, together with the front cover, forms the cavity with the base. The rear cover is fixedly connected to the front cover, and the rear cover has an opening through which the base passes, so that the rear cover can move variably with the front cover relative to the base, passing over the base.

[0014] In some embodiments, the airbag further includes a second airbag disposed between the side wing and the rear cover to drive the side wing to adjust its angle relative to the front cover.

[0015] In some embodiments, the side wing includes a front ear piece and a rear ear piece fixedly connected to the front ear piece, the front ear piece being variably movable relative to the front cover; the second air bag is disposed between the front ear piece and the rear cover to drive the side wing to adjust its angle relative to the front cover.

[0016] In some embodiments, the headrest further includes a second return spring, one end of which is connected to the front ear piece and the other end of which is connected to the rear cover; or, it further includes a torsion spring, the two ends of which are respectively connected to the front ear piece and the front cover.

[0017] In some embodiments, the rear ear piece overlaps with the side edge portion of the rear cover to form an overlapping area.

[0018] In some embodiments, the front ear piece is pivotally connected to the front cover via a second pivot to move variably relative to the front cover, and the overlapping area is configured as an arcuate surface formed around the axis of the second pivot.

[0019] In some embodiments, an audio assembly is provided within the side wing.

[0020] In some embodiments, the front cover and the base are pivotally connected at the top via a first pivot and are provided with a mutually cooperating sliding limiting structure at the bottom to limit the angle adjustment range of the front cover.

[0021] In some embodiments, the sliding limiting structure includes a locking member fixed to the front cover and extending toward the base, and a corresponding stop fixed to the base. The extended end of the locking member is formed with a hook. When the front cover swings relative to the base to the maximum set angle, the stop and the hook of the locking member lock against each other to prevent the front cover from continuing to swing.

[0022] In some embodiments, the adjustable headrest further includes:

[0023] A first component is connected to the front earpiece and protrudes rearward relative to the front earpiece, or connected to the rear earpiece and protrudes forward relative to the rear earpiece; and

[0024] The second component is connected to the headrest cover or the base and is spaced apart from the first component in the left-right direction.

[0025] The air bag is disposed between the first component and the second component, and the side wing is driven to adjust its angle relative to the base by applying a force to the first component.

[0026] Furthermore, along the direction from the front cover to the base, the distance between the surface of the first component that contacts the air bag and the longitudinal center of the front cover extending in the front-rear direction is constant or gradually increases.

[0027] In some embodiments, the adjustable headrest further includes:

[0028] A first component is connected to the front earpiece and protrudes rearward relative to the front earpiece, or connected to the rear earpiece and protrudes forward relative to the rear earpiece; and

[0029] The second component is connected to the headrest cover and is spaced apart from the first component in the left-right direction;

[0030] The second airbag is disposed between the first component and the second component, and drives the side wing to adjust its angle relative to the front cover by applying a force to the first component;

[0031] Furthermore, along the direction from the front cover to the base, the distance between the surface of the first component that contacts the second air bag and the longitudinal center of the front cover extending in the front-rear direction is constant or gradually increases.

[0032] This application includes, but is not limited to, the following beneficial effects:

[0033] 1. By dividing the headrest assembly into a fixed part and a movable part, and cooperating with the air bag to push out the movable part of the headrest assembly, the headrest can be automatically adjusted, including tilt adjustment, translation adjustment and side wing adjustment, etc. It is convenient to operate and has good support. Moreover, by placing the air bag in the cavity formed between the headrest cover and the base, the pneumatic adjustment method of this application has a larger support capacity than the pneumatic adjustment method of simply pushing out the cover, thus ensuring the comfort of adjustment.

[0034] 2. By designing the back cover and creating an opening on the back cover for the base to pass through, the base can be enclosed within the headrest cover, reducing the space occupied by the headrest in the thickness direction. Furthermore, when adjusting the headrest, the gap between the headrest cover and the base is formed on the back of the headrest, so that when the headrest is installed in front of the backrest assembly, this gap can be concealed by the backrest assembly. This not only increases the aesthetic appeal of the headrest but also makes it suitable for applications with high backrests.

[0035] 3. Through the design of the overlapping area between the side wings and the base, or between the side wings and the side of the back cover, and the further design of the arc surface of the overlapping area, the gap on the back of the headrest is sealed when adjusting. During the side wing adjustment, the overlapping area covering the gap can always maintain the same curve as the back of the headrest, ensuring the aesthetic appearance of the seat headrest whether it is connected to the top or front of the backrest assembly. Attached Figure Description

[0036] Figure 1 shows an exploded view of the main structure of the seat headrest.

[0037] Figure 2 shows an exploded structural diagram of the first embodiment of the headrest assembly in this application from a frontal view.

[0038] Figure 3 shows a schematic diagram of the first rotating shaft structure with a damping section.

[0039] Figure 4 shows an exploded structural diagram of the first embodiment of the headrest assembly in this application from a rear-view perspective.

[0040] Figure 5 shows a top view comparing the state of the headrest assembly in the first embodiment of this application before and after adjustment of one side wing.

[0041] Figure 6 shows a top view comparing the tilt adjustment state before and after the first embodiment of the headrest assembly in this application.

[0042] Figure 7 shows a rear view comparing the two-sided wing adjustment states before and after the first embodiment of the headrest assembly in this application.

[0043] Figure 8 shows a schematic diagram of the overlapping area state before side wing adjustment in the first embodiment of the headrest assembly in this application.

[0044] Figure 9 shows an enlarged view of point A in Figure 8.

[0045] Figure 10 shows a schematic diagram of the overlapping area after side wing adjustment in the first embodiment of the headrest assembly in this application.

[0046] Figure 11 shows an enlarged view of point B in Figure 10.

[0047] Figure 12 shows a longitudinal sectional view of the first embodiment of the headrest assembly in this application at the corresponding stop and hook positions.

[0048] Figure 13 shows a longitudinal cross-sectional view of the first embodiment of the headrest assembly in this application at the corresponding stop point and hook position.

[0049] Figure 14 shows a longitudinal cross-sectional view of the first embodiment of the headrest assembly in this application, taken at the middle position of the corresponding air bag.

[0050] Figure 15 shows a longitudinal cross-sectional view of the first embodiment of the headrest assembly in this application, taken at the middle position of the corresponding air bag.

[0051] Figure 16 shows a longitudinal cross-sectional view of the first embodiment of the headrest assembly in this application, taken at the middle position of the corresponding right airbag.

[0052] Figure 17 shows a longitudinal cross-sectional view of the first embodiment of the headrest assembly in this application, taken at the middle position of the corresponding right airbag.

[0053] Figure 18 shows an exploded structural diagram of the second embodiment of the headrest assembly in this application from a frontal view.

[0054] Figure 19 shows an exploded structural diagram of the second embodiment of the headrest assembly in this application from a rear-view perspective.

[0055] Figure 20 shows an exploded structural diagram of the third embodiment of the headrest assembly in this application from a frontal view.

[0056] Figure 21 shows an exploded structural diagram of the third embodiment of the headrest assembly in this application from a rear-view perspective.

[0057] Figure 22 shows an exploded structural diagram of the fourth embodiment of the headrest assembly in this application from a frontal view.

[0058] Figure 23 shows an exploded structural diagram of the fourth embodiment of the headrest assembly in this application from a rear-view perspective.

[0059] Figure 24 shows an exploded structural diagram of the fifth embodiment of the headrest assembly in this application from a frontal view.

[0060] Figure 25 shows an exploded structural diagram of the fifth embodiment of the headrest assembly in this application from a rear-view perspective.

[0061] Figure 26 shows an exploded structural diagram of the sixth embodiment of the headrest assembly in this application from a frontal view.

[0062] Figure 27 shows an exploded structural diagram of the sixth embodiment of the headrest assembly in this application from a rear view.

[0063] Figure 28 shows an exploded structural diagram of the seventh embodiment of the headrest assembly in this application from a forward-looking perspective.

[0064] Figure 29 shows a cross-sectional view of the seventh embodiment of the headrest assembly in this application.

[0065] Figure 30 shows an exploded structural diagram of the eighth embodiment of the headrest assembly in this application from a forward-viewing perspective.

[0066] Figure 31 shows a cross-sectional view of the eighth embodiment of the headrest assembly in this application.

[0067] Figure 32 shows an exploded structural diagram of the ninth embodiment of the headrest assembly in this application from a forward-viewing perspective.

[0068] Figure 33 shows a cross-sectional view of the ninth embodiment of the headrest assembly in this application. Detailed Implementation

[0069] Referring to Figure 1, existing seat headrests typically include a headrest assembly 1, a headrest foam 4 covering the surface of the headrest assembly 1, and a headrest cover 5 covering the surface of the headrest foam 4. To address the problems of inconvenient adjustment and insufficient comfort in existing seat headrests, this application provides an adjustable seat headrest, primarily improving the headrest assembly 1. In general, the headrest assembly 1 includes: a headrest cover; a base connected to the seat back, the headrest cover being movable relative to the base; and an airbag disposed between the headrest cover and the base to drive the headrest cover to move relative to the base. This application divides the headrest assembly into a fixed part (base) and a movable part (headrest cover). By using an air bag to push out the movable part of the headrest assembly, the headrest can be automatically adjusted, including tilt adjustment, translation adjustment, and side wing adjustment. It is easy to operate and provides good support. Furthermore, by housing the air bag in the cavity formed between the headrest cover and the base, the pneumatic adjustment method of this application has a larger support capacity than the pneumatic adjustment method of simply pushing out the cover, thus ensuring the comfort of adjustment.

[0070] It should be noted that in the description of this application, the directional terms "inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself. Furthermore, the directional terms such as "front," "rear," "up," "down," "left," and "right," "lateral," "vertical," "horizontal," and "top" and "bottom" indicate directions or positional relationships that are generally based on the vehicle's normal driving position or positional relationship. Specifically, the vehicle's driving direction is the front-rear direction; for example, the forward direction is "front," and the backward direction is "rear." The direction parallel to gravity is the up-down direction; specifically, the direction in the same direction as gravity is "down," and the direction opposite to gravity is "up." The direction perpendicular to the front-rear and up-down directions is the left-right direction; specifically, left and right when facing "front" are "left" and "right," respectively. The front cover mentioned below refers to the portion of the seat headrest facing the passenger sitting in the seat.

[0071] The adjustable seat headrest will be further described below with reference to specific embodiments and accompanying drawings.

[0072] In the first embodiment, the headrest provided in this embodiment can achieve both headrest tilt adjustment and headrest side wing adjustment. Referring specifically to Figures 1-17, the headrest cover is variably connected to the base 310 via a pivot assembly, which includes a first pivot 170 and a second pivot 120. The airbag includes a first airbag 230 and a second airbag 210. The headrest cover includes a front cover 130, a rear cover 330 fixedly connected to the front cover 130, and side wings disposed on the left and right sides of the front cover 130. The front cover 130 and the rear cover 330 are fixedly fastened together by snap-fit ​​connections, and the front cover 130 is rotatably connected to the base 310 via the first pivot 170. The first pivot 170 extends in the left-right direction, allowing the front cover 130 to tilt by rotating around the first pivot 170. The front cover 130 and the rear cover 330 together cooperate with the base 310 to form a cavity. The first air bag 230 is housed in this cavity and acts between the front cover 130 and the base 310 to drive the front cover 130 to rotate relative to the base 310, thereby realizing the front-to-back angle adjustment of the headrest, i.e., the headrest tilt adjustment. The rear cover 330 has a first opening 3302 for the base 310 to pass through, so that the rear cover 330 can move variablely with the front cover 130 relative to the base 310 as the angle of the front cover 130 relative to the base 310 changes. The left and right sides of the front cover 130 are pivotally connected to the first front ear piece 110 and the second front ear piece 140 respectively via the second pivot 120. The second pivot 120 extends vertically (i.e., extends in the up-down direction). The first front ear piece 110 is fixedly fastened to the first rear ear piece 340 by a snap fastener. The first front ear piece 110 and the first rear ear piece 340 together form one side wing. The second front ear piece 140 is fixedly fastened to the second rear ear piece 320 by a snap fastener. The second front ear piece 140 and the second rear ear piece 320 together form the other side wing. There are two second air bags 210, which are respectively disposed between the first front ear piece 110 and the rear cover 330, and between the second front ear piece 140 and the rear cover 330, so as to drive the side wing to rotate relative to the front cover 130 (that is, relative to the base 310), thereby realizing the adjustment of the swing angle of the side wing, that is, the adjustment of the headrest side wing.

[0073] In this embodiment, the two second air bags 210 are used for headrest side wing adjustment. They are respectively attached between one side of the first front ear piece 110 and the back cover 330, and between the other side of the second front ear piece 140 and the back cover 330. Each of the two second air bags 210 is provided with an air tube 220, which is connected to an air pump assembly mounted on the backrest assembly 6. The air pump assembly can selectively inflate the two second air bags 210. When the second air bag 210 is inflated, its volume expands, thereby pushing the first front ear piece 110 or the second front ear piece 140 forward. Specifically, refer to Figures 16 and 17, which show the positional relationship between the second air bag 210, the first front ear piece 110, and the back cover 330. In this embodiment, when adjusting the headrest side wings, since the first front ear piece 110 and the second front ear piece 140 are rotatably connected to the front cover 130, and the first rear ear piece 340 and the second rear ear piece 320 are fixed to the first front ear piece 110 and the second front ear piece 140, when the second air bag 210 pushes the first front ear piece 110 or the second front ear piece 140 forward, the corresponding first rear ear piece 340 or the second rear ear piece 320 will rotate relative to the front cover 130, thereby realizing the rotation of the side wing relative to the base 310, that is, realizing the adjustment of the headrest side wings. The headrest side wing adjustment can be performed on both sides as needed (as shown in Figure 7) or on one side (as shown in Figure 5). The side wing adjustment angle is α°, and the size of the side wing adjustment angle α° is related to its inflation volume. The larger the inflation volume, the greater the volume expansion, and the larger the side wing adjustment angle α°.

[0074] In this embodiment, the first air bag 230 is used for headrest tilt adjustment. A base plate 250 is snapped onto the side of the base 310 facing the front cover 130. The first air bag 230 is hung between the base plate 250 and the front cover 130. An air tube 220 is also provided on the first air bag 230, which is connected to an air pump assembly. The air pump assembly allows for selective inflation of the first air bag 230. When the first air bag 230 inflates, it pushes the front cover 130 forward. See Figures 12-15 for details, which show the positional relationship between the first air bag 230, the front cover 130, the base plate 250, and the base 310. In this embodiment, when adjusting the headrest tilt, the base 310 is fixedly connected to the backrest assembly 6, the rear cover 330 is fastened to the front cover 130, and the rear cover 330 has a first opening 3302 for the base 310 to pass through. The first front ear piece 110 and the second front ear piece 140 are connected to the front cover 130, and the first rear ear piece 340 and the second rear ear piece 320 are fixedly connected to the first front ear piece 110 and the second front ear piece 140, respectively. Therefore, when the first air bag 230 pushes the front cover 130 forward, the front cover 130 will rotate around the first pivot 170, and drive the rest of the parts except the base 310 to rotate together, so as to realize the tilt adjustment of the headrest cover relative to the base 310, that is, to realize the headrest tilt adjustment, as shown in Figure 6. The tilt adjustment angle is β°, and the size of the tilt adjustment angle β° is related to its inflation volume. In this embodiment, the design of the back cover 330 and the first opening 3302 allows the base 310 to be enclosed in the headrest cover, reducing the space occupied by the seat headrest in the thickness direction.

[0075] It should be noted that, in order to facilitate the connection of each air pipe 220 to the air pump assembly outside the seat headrest, a second opening 2501 and a third opening 3102 are respectively provided on the base plate 250 and the base 310 for each air pipe 220 to pass through. Both the second opening 2501 and the third opening 3102 can be connected to the first opening 3302. Each air pipe 220 passes through the second opening 2501, the third opening 3102 and the first opening 3302 in sequence and then connects to the air pump assembly.

[0076] In this embodiment, as shown in Figures 5-7, the front cover 130, the first front ear piece 110, and the second front ear piece 140 together form the front of the headrest assembly 1, while the base 310, the rear cover 330, the first rear ear piece 340, and the second rear ear piece 320 together form the back of the headrest assembly 1. The design of the first rear ear piece 340 and the second rear ear piece 320 ensures that when adjusting the headrest side wings, the gap between the side wings and the rear cover 330 is formed on the back of the headrest assembly 1. When the seat headrest is installed in front of the backrest assembly 6, this gap can be concealed by the backrest assembly 6, increasing the aesthetic appeal of the seat headrest and making it suitable for high-back applications. Preferably, the first rear ear piece 340 and the second rear ear piece 320 overlap with the side edge portion of the rear cover 330 to form an overlapping area 350, thus concealing the gap. Furthermore, the overlapping area 350 formed by the first rear ear piece 340 overlapping with the side edge portion of the rear cover 330 can be formed by extending the first rear ear piece 340 inward or by extending the side edge of the rear cover 330 outward. Similarly, the overlapping area 350 formed by the second rear ear piece 320 overlapping with the side edge portion of the rear cover 330 can be formed by extending the second rear ear piece 320 inward or by extending the side edge of the rear cover 330 outward. Figures 2 and 4 show the overlapping area 350 formed by extending outward from the side edge of the rear cover 330, which is inserted into the inner side of the corresponding first rear ear piece 340 during assembly. Figures 8-11 show the overlapping area 350 formed by extending inward from the first rear ear piece 340, which is inserted into the inner side of the side edge of the rear cover 330 during assembly. Preferably, the overlapping area 350 is constructed as an arcuate surface formed around the axis of the corresponding second pivot 120. By designing the curved surface of the overlapping area 350, the overlapping area 350 that covers the gap can always maintain the same curve as the back of the headrest during the side wing construction, ensuring the aesthetic appearance of the seat headrest whether it is connected to the top or the front of the backrest assembly 6.

[0077] Preferably, as shown in Figures 2 and 4, a pair of second return springs 150 for side wing adjustment rotation reset are connected between the first front ear piece 110 and the rear cover 330, and between the second front ear piece 140 and the rear cover 330. Each pair of second return springs 150 is arranged vertically at intervals. A first return spring 160 is also connected between the front cover 130 and the base 310, and the tilt adjustment swing reset is achieved by the first return spring 160. Preferably, one first return spring 160 is connected between each side of the front cover 130 and the base 310 to ensure stability when they rotate relative to each other.

[0078] In this embodiment, the front cover 130 and the base 310 are pivotally connected at the top via the first pivot 170. A sliding limiting structure is provided between the bottom of the front cover 130 and the base 310 to prevent the front cover 130 from swaying left and right when it rotates relative to the base and to limit the flipping range of the front cover 130. Specifically, as shown in Figures 12 and 13, the sliding limiting structure includes a locking member 1301 fixed to the front cover 130 and extending towards the base 310, and a stop point 3101 correspondingly fixed to the base 310. The extended end of the locking member 1301 is formed with a hook. When the front cover 130 swings relative to the base 310 to the maximum set angle, the stop point 3101 and the hook of the locking member 1301 lock each other to prevent the front cover 130 from continuing to swing.

[0079] In this embodiment, the headrest cover is angularly connected relative to the base 310 through a pivot assembly. In some embodiments, a pin-slide mechanism that can slide relative to each other along a certain arc can also be used to achieve the angularly connected headrest cover relative to the base 310. Only a pin needs to be provided on the front cover 130 / base 310, and an arc-shaped slide groove for the pin to slide on the base 310 / front cover 130. In the case where the connection is achieved through the pin-slide mechanism, the stop point 3101 and the locking piece 1301 mentioned above can be directly formed on the pin and the slide groove.

[0080] In this embodiment, both the headrest tilt adjustment and the headrest side wing adjustment are pneumatic adjustments, and the air bag is housed in the cavity formed between the headrest cover and the base 310. Compared with the pneumatic adjustment method that simply pushes out the cover, this provides greater support and ensures adjustment comfort. Of course, the above embodiment is only a preferred implementation. In practical applications, adjustments can be made as needed. For example, in some embodiments, only one of the headrest tilt adjustment and headrest side wing adjustment can be pneumatically adjusted, while the other can be mechanically adjusted using a rotating shaft with a damping component. It should be noted that for the pneumatic adjustment, the corresponding first rotating shaft 170 or second rotating shaft 120 is simply a conventional rotating shaft capable of relative rotation. However, for the mechanical adjustment, the corresponding first rotating shaft 170 or second rotating shaft 120 needs to be equipped with a damping component. As shown in Figure 3, taking the mechanical adjustment of the headrest side wings as an example, the second rotating shaft 120 includes a shaft body 1201 and a damping part 1202 sleeved on the outer periphery of the shaft body 1201. As shown in Figure 2, the front cover 130 has a pair of shaft holes on each side. The two ends of the two shaft bodies 1201 are inserted into the two pairs of shaft holes to achieve a fixed connection with the front cover 130. The two damping parts 1202 are fixedly connected to the first front ear piece 110 and the second front ear piece 140, respectively. When headrest side wing adjustment is required, the first front ear piece 110 and / or the second front ear piece 140 are manually moved to rotate relative to the front cover 130. The corresponding damping parts 1202 will generate a damping force relative to the shaft body 1201, thereby achieving the purpose of single-sided or double-sided side wing adjustment. If the headrest tilt adjustment adopts a mechanical adjustment method, the first rotating shaft 170 can be adjusted to have a damping part and positioned between the front cover 130 and the base 310. In addition to using a rotating shaft with damping to achieve mechanical adjustment, a conventional mechanical locking structure (such as a motor with lead screw, gear rack and pinion transmission mechanism) can be used instead of an air bag installed in the cavity between the front cover 130 and the base 310, and act on the front cover 130 and the base 310 to drive the front cover 130 to swing relative to the first rotating shaft 170. Automatic adjustment can also be achieved by using a mechanical locking structure.

[0081] In the second embodiment, the headrest side wing adjustment and headrest tilt adjustment are also achieved through the pneumatic mechanism assembly 20. The difference from the first embodiment lies in the installation position of the air pump assembly. As shown in Figures 18 and 19, in this embodiment, the air pump assembly is installed between the base plate 250 and the base 310. The air pump assembly includes an air pump 270 and an air valve 280 connected to the air pump 270. Both the air pump 270 and the air valve 280 are rigidly fixed to the base 310 by screws 290. The air valve 280 has three branch pipes. The air pipes 220 of the first air bag 230 and the two second air bags 210 pass through the second opening 2501 on the base plate 250 and are connected to the three branch pipes of the air valve 280 one by one. The air valve 280 realizes the opening and closing of the three branch pipes, thereby realizing the selective inflation of the first air bag 230 and the two second air bags 210 by the air pump 270. In addition, the air pump 270 is also provided with an air pump harness 260, which passes through the third opening 3102 and the first opening 3302 and is connected to the power supply outside the seat headrest so as to provide power to the air pump 270.

[0082] It should be noted that, in addition to installing the air pump assembly inside the seat back or headrest as in the first and second embodiments, the air bags can also be directly connected to the external vehicle air source via the air pipe 220. Furthermore, the first and second embodiments, by employing the pneumatic mechanism assembly 20, can achieve automatic control of headrest side wing adjustment and headrest tilt adjustment. If the pivotal connection of the first pivot 170 between the top of the front cover 130 and the base 310 in the first and second embodiments is changed to a sliding connection using a pin and groove mechanism, and the same pin and groove mechanism is used for the sliding connection between the front cover 130 and the bottom of the base 310, then automatic control of headrest side wing adjustment and headrest translation adjustment can be achieved. When the front cover 130 moves relative to the base 310 to the preset forward position, the corresponding stop point 3101 and the hook of the locking piece 1301 interlock to prevent the front cover 130 from moving further forward. Passengers can use remote devices to control the headrest tilt / translation and the rotation angle of any side wings, making operation more convenient. It avoids the problems of traditional manual adjustment of headrest side wings using a combination of pivot and damping parts, which requires consideration of the adjustment force value, cannot withstand greater accidental force and may be accidentally pressed back into place, has poor support, and cannot meet the needs of all consumers in the market. At the same time, it avoids the problems of traditional mechanical headrest tilt adjustment mechanisms being limited by mechanical locking and limiting structures, requiring the stroke to be divided into multiple levels, and the adjustment process is not smooth enough.

[0083] The third embodiment differs from the first embodiment in that the headrest in this embodiment only has a headrest tilt adjustment function. Specifically, referring to Figures 1, 20, and 21, the pivot assembly in the headrest assembly 1 only includes a first pivot 170, and the air bag only includes a first air bag 230. The headrest cover includes a front cover 130 and a rear cover 330 fixedly connected to the front cover 130. The front cover 130 and the rear cover 330 are fixedly fastened together by snaps, and the front cover 130 is rotatably connected to the base 310 through the first pivot 170. The front cover 130 and the rear cover 330 together cooperate with the base 310 to form a cavity, and the first air bag 230 is housed in the cavity and acts between the front cover 130 and the base 310 to drive the front cover 130 to rotate relative to the base 310, thereby realizing the headrest tilt adjustment. The rear cover 330 has a first opening 3302 for the base 310 to pass through, so that the rear cover 330 can move variably with the front cover 130 relative to the base 310 as the base 310 passes over the base 310. In this embodiment, the first air bag 230 is used for headrest tilt adjustment. The base 310 is fixedly attached to the side facing the front cover 130 with a base plate 250. The first air bag 230 is hung between the base plate 250 and the front cover 130. The first air bag 230 is also provided with an air tube 220, which is connected to an air pump assembly. The air pump assembly can selectively inflate the first air bag 230. When the first air bag 230 is inflated, it will push the front cover 130 forward. The front cover 130 will drive the rear cover 330 to rotate relative to the base 310, thereby realizing headrest tilt adjustment. Preferably, a first return spring 160 is also connected between the front cover 130 and the base 310, and the tilt adjustment swing return is achieved by the first return spring 160. Preferably, one first return spring 160 is connected between each side of the front cover 130 and the base 310 to ensure the stability of relative rotation between the two. In this embodiment, the rotating shaft assembly can also be replaced by a pin and groove engagement mechanism.

[0084] The fourth embodiment differs from the third embodiment only in that the headrest of this embodiment also has an audio function. Specifically, referring to Figures 22 and 23, audio assemblies 40 are respectively provided between the front cover 130 and the rear cover 330 and on opposite sides of the base 310. The audio assemblies 40 are fixedly connected to the front cover 130 by screws. When the front cover 130 and the rear cover 330 rotate relative to the base 310, the two audio assemblies 40 move accordingly, so that the headrest can maintain the audio effect after the headrest is tilted.

[0085] The fifth embodiment differs from the first embodiment in that the headrest in this embodiment only has a headrest side wing adjustment function. Specifically, referring to Figures 1, 24, and 25, the pivot assembly in the headrest assembly 1 only includes a second pivot 120, and the air bag only includes a second air bag 210. The headrest cover includes a front cover 130 and side wings disposed on the left and right sides of the front cover 130. The front cover 130 and the base 310 are fixedly fastened together by buckles. The left and right sides of the front cover 130 are pivotally connected to the first front ear piece 110 and the second front ear piece 140 by the second pivot 120, respectively. The first front ear piece 110 is fixedly fastened to the first rear ear piece 340 by buckles. The first front ear piece 110 and the first rear ear piece 340 together form one side wing. The second front ear piece 140 is fixedly fastened to the second rear ear piece 320 by buckles. The second front ear piece 140 and the second rear ear piece 320 together form the other side wing. There are two second air bags 210, which are respectively located between the first front ear piece 110 and the base 310, and between the second front ear piece 140 and the base 310, so as to drive the side wing to rotate relative to the front cover 130 (that is, relative to the base 310), thereby realizing the adjustment of the swing angle of the side wing, that is, the adjustment of the headrest side wing. In this embodiment, the two second air bags 210 are used for headrest side wing adjustment. They are respectively attached between one side of the first front ear piece 110 and the base 310, and between the other side of the second front ear piece 140 and the base 310. Each of the two second air bags 210 is provided with an air tube 220, which is connected to an air pump assembly mounted on the backrest assembly 6. The air pump assembly can selectively inflate the two second air bags 210. When the second air bag 210 is inflated, its volume expands, thereby pushing the first front ear piece 110 or the second front ear piece 140 forward. The positional relationship between the second air bag 210, the first front ear piece 110 or the second front ear piece 140 and the base 310 can be referred to the positional relationship between the first front ear piece 110 and the back cover 330 in the first embodiment, as shown in Figures 16 and 17. In this embodiment, when adjusting the headrest side wings, since the first front ear piece 110 and the second front ear piece 140 are rotatably connected to the front cover 130, and the first rear ear piece 340 and the second rear ear piece 320 are fixed to the first front ear piece 110 and the second front ear piece 140, when the second air bag 210 pushes the first front ear piece 110 or the second front ear piece 140 forward, the corresponding first rear ear piece 340 or the second rear ear piece 320 will rotate relative to the front cover 130. This allows the headrest cover to rotate relative to the base 310, thus achieving headrest side wing adjustment. The headrest side wing adjustment can also be performed on both sides or one side as needed. Preferably, a pair of second return springs 150 for side wing adjustment rotation reset are connected between the first front ear piece 110 and the rear cover 330, and between the second front ear piece 140 and the rear cover 330.Each pair of second return springs 150 is arranged vertically at intervals. In this embodiment, the shaft assembly can also be replaced by a pin-and-slide mechanism.

[0086] The sixth embodiment differs from the fifth embodiment only in that the headrest of this embodiment also has an audio function. Specifically, referring to Figures 26 and 27, an audio assembly 40 is provided between the first front ear piece 110 and the first rear ear piece 340, and between the second front ear piece 140 and the second rear ear piece 320. The audio assembly 40 is fixedly connected to the first front ear piece 110 or the second front ear piece 140 by screws. When the side wing rotates relative to the base 310, the corresponding audio assembly 40 moves accordingly, so that the headrest can maintain the audio effect after the side wing is adjusted.

[0087] In the seventh embodiment, although the headrest also only has a side wing adjustment function compared to the fifth embodiment, the implementation method of the side wing adjustment is different. Specifically, referring to Figures 28 and 29, in this seventh embodiment, the headrest further includes a first component 7 and a second component 8. The first component 7 is connected to the front ear piece and protrudes rearward relative to the front ear piece. Thus, the connection between the first component 7 and the front ear piece forms a bent structure. The second component 8 is connected to the headrest cover or base 310 and is spaced apart from the first component 7 in the left-right direction. Thus, the connection between the second component 8 and the headrest cover or base 310 forms a bent structure. An airbag is disposed between the first component 7 and the second component 8, and by applying a force to the first component 7, the side wing is driven to adjust its angle relative to the base 310. Furthermore, along the direction from the front cover 130 to the base 310 (i.e., along the front-to-back direction), the distance between the surface of the first component 7 that contacts the air bag and the longitudinal centerline of the front cover 130 extending in the front-to-back direction is constant; that is, the surface of the first component 7 that contacts the air bag is approximately parallel to the longitudinal centerline of the front cover 130 extending in the front-to-back direction. Specifically, as shown in Figures 28 and 29, in this embodiment, the first front ear piece 110 and the second front ear piece 140 are each provided with a first component 7, while the front cover 130 is provided with two second components 8. The two second components 8 correspond one-to-one with the two first components 7. Each pair of corresponding first components 7 and second components 8 are opposite to each other in the left-to-right direction with a gap between them, and each pair of corresponding first components 7 and second components 8 is provided with a second air bag 210, so that the two side wings provided on the left and right sides of the front cover 130 can rotate relative to the base 310 and the front cover 130 under the action of independent air bags, thereby realizing side wing adjustment. The surface of each first component 7 that contacts the second air bag 210 is substantially parallel to the longitudinal centerline of the front cover 130 extending in the front-rear direction, such that the distance between the surface of each first component 7 that contacts the second air bag 210 and the longitudinal centerline of the front cover 130 extending in the front-rear direction is substantially constant.

[0088] Based on the above configuration, unlike the fifth embodiment shown in Figures 24 and 25, where the airbag directly applies a forward force to the front ear piece to drive the side wings to adjust their angle relative to the base 310, the airbag applies a left-right force to the first component 7 to drive the side wings to adjust their angle relative to the base 310. Furthermore, the two side wings do not share an airbag; instead, they are driven by separate airbags. Only a smaller airbag is needed to drive the side wings to adjust their angle, freeing up more internal space within the side wings. This allows for the placement of other components (such as the audio assembly 40) within that space. Simultaneously, each side wing is driven by an independent airbag, allowing for individual or simultaneous control of the angle adjustment of both side wings, flexibly meeting the needs of various scenarios.

[0089] It is understandable that, as an alternative, the first component 7 may not be located on the front earpiece, but rather on the rear earpiece. When the first component 7 is located on the rear earpiece, it protrudes forward relative to the rear earpiece and can cooperate with the second component 8 and the airbag to drive the side wings to adjust their angle. Alternatively, the second component 8 may not be located on the front cover 130, but rather on the base 310. Since the front cover 130 and the base 310 are relatively fixed when only side wing adjustment is achieved, the second component 8, whether located on the front cover 130 or the base 310, can cooperate with the first component 7 and the airbag to achieve rotation of the side wings relative to the front cover 130. The second component 8 and the headrest cover or base 310, as well as the first component 7 and the front or rear earpiece, can be integrally formed, or they can be separately formed and then fixedly connected.

[0090] Furthermore, as shown in Figures 28 and 29, the difference between this seventh embodiment and the fifth embodiment shown in Figures 24-25 is that the rotational reset of the side wing adjustment is no longer achieved through the second reset spring 150, but through the torsion spring 9. Specifically, as shown in Figures 28 and 29, in this embodiment, a torsion spring 9 is fitted on the second rotating shaft 120 corresponding to both side wings. The two ends of the torsion spring 9 are respectively connected to the front ear plate and the front cover 130 to apply an elastic force to the side wings to achieve rotational reset, thus facilitating the rotational reset of the two side wings.

[0091] The eighth embodiment differs from the seventh embodiment in that, as shown in Figures 30 and 31, in this eighth embodiment, along the direction from the front cover 130 to the base 310 (i.e., along the front-to-back direction), the distance between the surface of the first component 7 that contacts the airbag and the longitudinal centerline of the front cover 130 extending in the front-to-back direction is no longer constant, but varies and gradually increases. That is, the surface of the first component 7 that contacts the airbag and the longitudinal centerline of the front cover 130 extending in the front-to-back direction are no longer approximately parallel, but gradually tilted away from the longitudinal centerline of the front cover 130 extending in the front-to-back direction. In this way, the airbag can still drive the side wings to adjust their angle relative to the base 310 and the front cover 130 by applying a force (including a force in the left-to-right direction and a force in the front-to-back direction) to the first component 7, and the airbag occupies less space in the cavity between the headrest cover and the base, making it easier to arrange other components in the corresponding space.

[0092] Referring to the ninth embodiment, compared with the eighth embodiment, as shown in Figures 32 and 33, the similarity lies in that the side wing adjustment function is still driven by the cooperation of the first component 7, the second component 8 and the air bag. The difference is that in this ninth embodiment, the seat headrest not only has the headrest side wing adjustment function, but also has the headrest tilt adjustment function. It is understandable that, although Figures 32 and 33 only illustrate the case where the first component 7 is disposed on the front ear piece and the second component 8 is disposed on the front cover 130, in reality, in this embodiment, the first component 7 may not be disposed on the front ear piece but on the rear ear piece, and the second component 8 may not be disposed on the front cover 130 but on the rear cover 330. Furthermore, although Figures 32 and 33 only illustrate the case where, along the direction from the front cover 130 to the base 310 (i.e., along the front to back direction), the distance between the surface of the first component 7 that contacts the air bag (specifically the second air bag 210) and the longitudinal centerline of the front cover 130 extending in the front-rear direction gradually increases, in reality, in this embodiment, along the direction from the front cover 130 to the base 310 (i.e., along the front to back direction), the distance between the surface of the first component 7 that contacts the air bag and the longitudinal centerline of the front cover 130 extending in the front-rear direction may not gradually increase but may be constant.

[0093] The present application has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present application based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present application, and the scope of protection of the present application shall be defined by the appended claims.

Claims

1. An adjustable seat headrest, comprising: Headrest cover; A base connected to the seat back, wherein the headrest cover is movable relative to the base; An air bag is disposed between the headrest cover and the base to drive the headrest cover to move relative to the base.

2. The adjustable seat headrest as claimed in claim 1, wherein the headrest cover includes a front cover that forms a cavity with the base, the front cover being angularly movable relative to the base; the air bag is housed in the cavity to drive the front cover to adjust its angle relative to the base.

3. The adjustable seat headrest as claimed in claim 2, wherein the headrest cover further includes a rear cover that, together with the front cover and in conjunction with the base, forms the cavity, the rear cover being fixedly connected to the front cover, and the rear cover having an opening through which the base passes, so that the rear cover can move variably over the base as the front cover moves relative to the base.

4. The adjustable headrest as claimed in claim 1, wherein the headrest cover comprises: The front cover is fixedly connected to the base; as well as Side wings are provided on the left and right sides of the front cover. The side wings can move at a variable angle relative to the front cover. The air bag is disposed between the base and the side wings to drive the side wings to adjust the angle relative to the base.

5. The adjustable seat headrest of claim 4, wherein the side wing includes a front ear piece and a rear ear piece fixedly connected to the front ear piece, the front ear piece being variably movable relative to the front cover; the air bag is disposed between the front ear piece and the base to drive the side wing to adjust its angle relative to the base.

6. The adjustable headrest as described in claim 1, wherein, The headrest cover includes: a front cover that forms a cavity with the base, the front cover being variably movable relative to the base; and side wings disposed on the left and right sides of the front cover, the side wings being variably movable relative to the front cover. The airbag includes a first airbag housed within the cavity to drive the angle adjustment of the front cover relative to the base.

7. The adjustable seat headrest as described in claim 2 or 6 further includes a first reset spring, one end of which is connected to the front cover and the other end of which is connected to the base.

8. The adjustable seat headrest as claimed in claim 6 or 7, wherein the headrest cover further includes a rear cover that, together with the front cover, forms the cavity with the base, the rear cover being fixedly connected to the front cover, and the rear cover having an opening through which the base passes, so that the rear cover can move variably over the base with the front cover relative to the base.

9. The adjustable seat headrest of claim 8, wherein the airbag further comprises a second airbag disposed between the side wing and the rear cover to drive the side wing to adjust its angle relative to the front cover.

10. The adjustable seat headrest of claim 9, wherein the side wing includes a front ear piece and a rear ear piece fixedly connected to the front ear piece, the front ear piece being variably movable relative to the front cover; the second air bag is disposed between the front ear piece and the rear cover to drive the side wing to adjust its angle relative to the front cover.

11. The adjustable seat headrest as described in claim 5 or 10, further comprising a second return spring, one end of which is connected to the front ear piece and the other end of which is connected to the rear cover; or, further comprising a torsion spring, the two ends of which are respectively connected to the front ear piece and the front cover.

12. The adjustable seat headrest as claimed in claim 5 or 10, wherein the rear ear piece overlaps with a side edge portion of the rear cover to form an overlapping area.

13. The adjustable seat headrest of claim 12, wherein the front ear piece is pivotally connected to the front cover via a second pivot to move variably relative to the front cover, and the overlapping area is configured as an arcuate surface formed around the axis of the second pivot.

14. The adjustable headrest as claimed in any one of claims 4-13, wherein an audio assembly is provided within the side wing.

15. The adjustable seat headrest as described in any one of claims 2-3 and 6-14, wherein the front cover and the base are pivotally connected at the top via a first pivot and provided with a mutually cooperating sliding limiting structure at the bottom to limit the angle adjustment range of the front cover.

16. The adjustable seat headrest of claim 15, wherein the sliding limiting structure includes a locking member fixed to the front cover and extending toward the base, and a corresponding stop fixed to the base, wherein the extended end of the locking member is formed with a hook portion, and when the front cover swings relative to the base to a maximum set angle, the stop portion and the hook portion of the locking member engage with each other to prevent the front cover from continuing to swing.

17. The adjustable headrest as described in claim 5, further comprising: A first component is connected to the front earpiece and protrudes rearward relative to the front earpiece, or connected to the rear earpiece and protrudes forward relative to the rear earpiece; and The second component is connected to the headrest cover or the base and is spaced apart from the first component in the left-right direction. The air bag is disposed between the first component and the second component, and the side wing is driven to adjust its angle relative to the base by applying a force to the first component. Furthermore, along the direction from the front cover to the base, the distance between the surface of the first component that contacts the air bag and the longitudinal center of the front cover extending in the front-rear direction is constant or gradually increases.

18. The adjustable headrest of claim 10, further comprising: A first component is connected to the front earpiece and protrudes rearward relative to the front earpiece, or connected to the rear earpiece and protrudes forward relative to the rear earpiece; and The second component is connected to the headrest cover and is spaced apart from the first component in the left-right direction; The second airbag is disposed between the first component and the second component, and drives the side wing to adjust its angle relative to the front cover by applying a force to the first component; Furthermore, along the direction from the front cover to the base, the distance between the surface of the first component that contacts the second air bag and the longitudinal center of the front cover extending in the front-rear direction is constant or gradually increases.

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