Adjustable seat headrest

Abstract

The utility model relates to an adjustable seat headrest. The adjustable seat headrest comprises a headrest cover body, the base is connected with a seat backrest, and the headrest cover body can move relative to the base; and the air bag is arranged between the headrest cover body and the base so as to drive the headrest cover body to move and adjust relative to the base. The headrest assembly is divided into the fixed part and the movable part, the movable part is matched with the air bag to eject out of the headrest assembly, automatic adjustment of the headrest can be achieved, including inclination adjustment, translation adjustment, side wing adjustment and the like of the headrest, operation is convenient, supporting performance is good, compared with a pneumatic adjustment mode of purely ejecting out a face sleeve, the supporting amount is large, and the supporting effect is good. And the adjusting comfort is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile seat, especially adjustable seat headrest. BACKGROUND

[0002] With the improvement of the requirement of the consumer to the cabin environment, zero pressure seat is more and more used in the whole vehicle, in order to ensure the safety of the member in the zero pressure posture, the zero pressure seat often uses the integrated safety belt installed on the seat, which leads to the great improvement of the seat back height. When the seat reaches the zero pressure posture, the too high backrest will lead to the insufficient support of the upper backrest and head of the passenger, causing the comfort problem. In addition, the development of the vehicle-mounted home theater derives the more luxurious rear cabin, which is equipped with multimedia equipment (projection / screen) located in the middle position, and the passengers located on both sides generally need to actively turn to watch, and the head of the person has not enough support, leading to the weakening of the comfort. SUMMARY

[0003] In order to solve the above problems, the utility model provides a kind of adjustable seat headrest, by the headrest assembly is divided into fixed part and moving part, and cooperate with air bag and eject headrest assembly moving part, can realize headrest automatic adjustment, easy to operate, good support, and compared with the simple air adjustment mode of ejecting face cover, it has greater support, ensures the comfort of adjustment.

[0004] The utility model realizes by following scheme, a kind of adjustable seat headrest, it include: headrest cover body;With the base of seat back connection, the headrest cover body can be relative to the base movement;Air bag, it is arranged between the headrest cover body and the base, to drive the movement adjustment of the headrest cover body relative to the base.

[0005] In some embodiments, the headrest cover body includes: a front cover cooperating with the base to form a cavity, the front cover can be angularly variable relative to the base movement;The air bag is contained in the cavity, to drive the angle adjustment of the front cover relative to the base.

[0006] In some embodiments, the headrest cover body further includes a rear cover cooperating with the front cover to form the cavity with the base, the rear cover is fixedly connected with the front cover, and the rear cover is provided with an opening for the base to pass through, so that the rear cover can angularly variable relative to the base movement with the front cover.

[0007] In some embodiments, the headrest cover body includes: a front cover fixedly connected with the base;And side wing is set on the left and right sides of the front cover, the side wing can be angularly variable relative to the front cover movement, the air bag is arranged between the base and the side wing, to drive the angle adjustment of the side wing relative to the base.

[0008] In some embodiments, the side wing comprises a front ear piece and a rear ear piece fixedly connected with the front ear piece, the front ear piece being angularly variable relative to the front cover; the air bag is arranged between the front ear piece and the base to drive the angular adjustment of the side wing relative to the base.

[0009] In some embodiments, the headrest cover comprises a front cover angularly variable relative to the base and forming a cavity with the base, and side wings arranged on the left and right sides of the front cover and angularly variable relative to the front cover; the air bag comprises a first air bag accommodated in the cavity to drive the angular adjustment of the front cover relative to the base.

[0010] In some embodiments, the seat headrest further comprises a first reset tension spring, one end of which is connected to the front cover and the other end of which is connected to the base.

[0011] In some embodiments, the headrest cover further comprises a rear cover forming the cavity with the base together with the front cover, the rear cover being fixedly connected with the front cover, and the rear cover being provided with an opening through which the base passes, so that the rear cover can angularly move relative to the base with the front cover.

[0012] In some embodiments, the air bag further comprises a second air bag arranged between the side wing and the rear cover to drive the angular adjustment of the side wing relative to the front cover.

[0013] In some embodiments, the side wing comprises a front ear piece and a rear ear piece fixedly connected with the front ear piece, the front ear piece being angularly variable relative to the front cover; the second air bag is arranged between the front ear piece and the rear cover to drive the angular adjustment of the side wing relative to the front cover.

[0014] In some embodiments, the seat headrest further comprises a second reset tension spring, one end of which is connected to the front ear piece and the other end of which is connected to the rear cover.

[0015] In some embodiments, the rear ear piece and the side edge of the rear cover partially overlap to form an overlapping area.

[0016] The utility model includes but is not limited to the following beneficial effects:

[0017] 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, automatic adjustment of the headrest can be achieved, including inclination adjustment, translation adjustment and side wing adjustment, etc., which is convenient to operate, has good support, and by accommodating the air bag in the cavity formed between the headrest cover body and the base, the pneumatic adjustment mode of the utility model has a larger supporting amount than the pneumatic adjustment mode of simply pushing out the surface sleeve, ensuring the comfort of adjustment.

[0018] 2. By designing the rear cover and opening an opening on the rear cover for the base to pass through, the base can be covered in the headrest cover body, reducing the space occupied by the seat headrest in the thickness direction, and when adjusting the headrest, the gap between the headrest cover body and the base is formed on the back of the headrest, so that when the seat headrest is installed in front of the backrest assembly, the gap can be covered by the backrest assembly, which not only increases the appearance of the seat headrest, but also can be applied to high backrest applications.

[0019] 3. By designing the overlapping area between the side wing and the base, or the side wing and the side edge of the rear cover, and further designing the arc surface of the overlapping area, the gap on the back of the headrest is blocked during adjustment, and the overlapping area covering the gap can always keep consistent with the curve of the back of the headrest during the process of adjusting the side wing, whether the seat headrest is connected to the top or front of the backrest assembly, the appearance can be guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The main structure of the seat headrest is shown.

[0021] Figure 2 The first embodiment of the headrest assembly in the utility model is shown in the front view under the decomposition structure diagram.

[0022] Figure 3 The first rotating shaft structure with a damping part is shown.

[0023] Figure 4 The first embodiment of the headrest assembly in the utility model is shown in the rear view under the decomposition structure diagram.

[0024] Figure 5 The first embodiment of the headrest assembly in the utility model is shown in the front view under the decomposition structure diagram.

[0025] Figure 6 The first embodiment of the headrest assembly in the utility model is shown in the front view under the decomposition structure diagram.

[0026] Figure 7 The first embodiment of the headrest assembly in the utility model is shown in the front view under the decomposition structure diagram.

[0027] Figure 8 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram of the wing adjustment before.

[0028] Figure 9 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment. Figure 8 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0029] Figure 10 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0030] Figure 11 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment. Figure 10 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0031] Figure 12 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0032] Figure 13 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0033] Figure 14 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0034] Figure 15 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0035] Figure 16 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0036] Figure 17 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0037] Figure 18 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0038] Figure 19 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0039] Figure 20 The utility model discloses a headrest assembly first embodiment carries out the overlapping area state schematic diagram after the wing adjustment.

[0040] Figure 21The utility model discloses a headrest assembly third embodiment in rear view angle under the exploded structure schematic diagram of the utility model discloses a headrest assembly third embodiment.

[0041] Figure 22 The utility model discloses a headrest assembly fourth embodiment in front view angle under the exploded structure schematic diagram of the utility model discloses a headrest assembly fourth embodiment.

[0042] Figure 23 The utility model discloses a headrest assembly fourth embodiment in rear view angle under the exploded structure schematic diagram of the utility model discloses a headrest assembly fourth embodiment.

[0043] Figure 24 The utility model discloses a headrest assembly fifth embodiment in front view angle under the exploded structure schematic diagram of the utility model discloses a headrest assembly fifth embodiment.

[0044] Figure 25 The utility model discloses a headrest assembly fifth embodiment in rear view angle under the exploded structure schematic diagram of the utility model discloses a headrest assembly fifth embodiment.

[0045] Figure 26 The utility model discloses a headrest assembly sixth embodiment in front view angle under the exploded structure schematic diagram of the utility model discloses a headrest assembly sixth embodiment.

[0046] Figure 27 The utility model discloses a headrest assembly sixth embodiment in rear view angle under the exploded structure schematic diagram of the utility model discloses a headrest assembly sixth embodiment.

[0047] In the drawing: 1, headrest assembly;110, first front ear piece;120, second rotating shaft;1201, shaft body;1202, damping part;130, front cover;1301, clamping piece;140, second front ear piece;150, second reset tension spring;160, first reset tension spring;170, first rotating shaft;20, pneumatic mechanism assembly;210, second air bag;220, air pipe;230, first air bag;250, base plate;2501, second opening;260, air pump wire harness;270, air pump;280, air valve;290, screw;310, base;3101, block point;3102, third opening;3103, mounting structure;320, second rear ear piece;330, rear cover;3302, first opening;340, first rear ear piece;350, overlapping area;40, sound assembly;4, headrest foaming;5, headrest face cover;6, backrest assembly. DETAILED DESCRIPTION

[0048] Reference Figure 4As shown, the existing seat headrest generally includes a headrest assembly 1, a headrest foam 4 wrapped on the surface of the headrest assembly 1, and a headrest cover 5 wrapped on the surface of the headrest foam 4. In order to solve the problem of inconvenient adjustment and insufficient comfort of the existing seat headrest, the utility model provides an adjustable seat headrest, which mainly improves the headrest assembly 1. In general, the headrest assembly 1 includes: a headrest cover body; a base connected with a seat back, the headrest cover body can move relative to the base; a gas bag is arranged between the headrest cover body and the base to drive the movement adjustment of the headrest cover body relative to the base. The utility model divides the headrest assembly into a fixed part and a moving part, and cooperates with the gas bag to push out the moving part of the headrest assembly, so that the headrest can be automatically adjusted, including inclination adjustment, translation adjustment and side wing adjustment of the headrest, which is convenient to operate, has good support, and by containing the gas bag in the cavity formed between the headrest cover body and the base, the pneumatic adjustment mode of the utility model has a larger support amount than the pneumatic adjustment mode of simply pushing out the cover, which ensures the comfort of adjustment. The adjustable seat headrest will be further described below in combination with specific embodiments and drawings.

[0049] The first embodiment provides a seat headrest which can realize inclination adjustment and side wing adjustment of the headrest. Specifically, refer to Figures 1-17As shown, the headrest cover is connected to the base 310 through a pivot assembly including a first pivot 170 and a second pivot 120, and the air bags include a first air bag 230 and a second air bag 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 is fixedly connected to the rear cover 330 through buckling, 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 cooperatively form a cavity with the base 310, and the first air bag 230 is accommodated 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 achieving forward and backward angle adjustment of the headrest, i.e., inclination adjustment of the headrest. The rear cover 330 is provided with a first opening 3302 through which the base 310 passes, so that the rear cover 330 can move relative to the base 310 at a variable angle with the front cover 130. The left and right sides of the front cover 130 are respectively pivotably connected to a first front ear piece 110 and a second front ear piece 140 through the second pivot 120. The first front ear piece 110 is fixedly connected to a first rear ear piece 340 through buckling, and the first front ear piece 110 and the first rear ear piece 340 cooperatively form a side wing. The second front ear piece 140 is fixedly connected to a second rear ear piece 320 through buckling, and the second front ear piece 140 and the second rear ear piece 320 cooperatively form another side wing. The second air bag 210 is provided in two numbers and is 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, respectively, to drive the side wings to rotate relative to the front cover 130 (i.e., relative to the base 310), thereby achieving swing angle adjustment of the side wings, i.e., side wing adjustment of the headrest.

[0050] In the present embodiment, the two second air bags 210 are used for headrest side wing adjustment and are respectively hung between one side of the first front ear piece 110 and the rear cover 330 and between the other side of the second front ear piece 140 and the rear cover 330. The second air bags 210 are provided with air pipes 220 connected to a gas pump assembly installed on the backrest assembly 6, and the gas pump assembly can selectively inflate the second air bags 210. After being inflated, the second air bags 210 expand in volume and push the first front ear piece 110 or the second front ear piece 140 forward. Specifically, the first front ear piece 110 and the second front ear piece 140 can be pivoted relative to the base 310 through the second pivot 120 to achieve inclination adjustment of the headrest. Figure 16 and Figure 17The position relationship between the second air bag 210, the first front ear piece 110 and the rear cover 330 is shown in the figure. In this embodiment, when the headrest side wing adjustment is performed, the first front ear piece 110 and the second front ear piece 140 are respectively pivotally connected to the front cover 130, while the first rear ear piece 340 and the second rear ear piece 320 are respectively fixed to the first front ear piece 110 and the second front ear piece 140. Therefore, when the second air bag 210 pushes the first front ear piece 110 or the second front ear piece 140 forward, the first rear ear piece 340 or the second rear ear piece 320 will be pivoted relative to the front cover 130 accordingly. In turn, the side wing is pivoted relative to the base 310, i.e. the headrest side wing adjustment is realized. The headrest side wing adjustment can be bilateral adjustment (as shown in Figure 7 ) or unilateral adjustment (as shown in Figure 5 ) according to the requirement, and the side wing adjustment angle a° is related to the inflation amount. The greater the inflation amount, the greater the volume expansion, and the greater the side wing adjustment angle a°.

[0051] In this embodiment, the first air bag 230 is used for headrest tilt adjustment. The base 310 is clamped and fixed with a base plate 250 on the side facing the front cover 130. 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 pipe 220 connected to the air pump assembly. The air pump assembly can selectively inflate the first air bag 230. When the first air bag 230 is inflated and expanded, it will push the front cover 130 forward. Specifically, it can be combined with Figures 12-15 The position relationship between the first air bag 230, the front cover 130, the base plate 250 and the base 310 is shown in the figure. In this embodiment, when the headrest tilt adjustment is performed, the base 310 is fixedly connected with the backrest assembly 6. The rear cover 330 is buckled with the front cover 130, and the rear cover 330 is provided with 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 with the front cover 130, and the first rear ear piece 340 and the second rear ear piece 320 are respectively fixedly connected with the first front ear piece 110 and the second front ear piece 140. Therefore, when the first air bag 230 pushes the front cover 130 forward, the front cover 130 will be pivoted around the first pivot 170, and the rest of the parts except the base 310 will be pivoted together to realize the tilt adjustment of the headrest cover body relative to the base 310, i.e. the headrest tilt adjustment is realized, as shown in Figure 6 The tilt adjustment angle b° is related to the inflation amount. In this embodiment, the design of the rear cover 330 and the first opening 3302 allows the base 310 to be covered in the headrest cover body, reducing the space occupied by the seat headrest in the thickness direction.

[0052] It is to be noted that in order to facilitate the connection of the air tubes 220 to the air pump assembly outside the seat headrest, second openings 2501 and third openings 3102 are respectively formed on the base plate 250 and the base 310 for the air tubes 220 to pass through, and the second openings 2501 and the third openings 3102 are both connected to the first opening 3302, and the air tubes 220 are sequentially connected to the air pump assembly after passing through the second openings 2501, the third openings 3102 and the first opening 3302.

[0053] In the present embodiment, as shown in Figures 5-7 the front cover 130, the first front ear piece 110 and the second front ear piece 140 jointly form the front face 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 jointly form the back face of the headrest assembly 1. Through the design of the first rear ear piece 340 and the second rear ear piece 320, the gap between the side wings and the rear cover 330 during the adjustment of the side wings is formed on the back face of the headrest assembly 1, and when the seat headrest is installed in front of the backrest assembly 6, the gap can be covered by the backrest assembly 6, which not only increases the aesthetic appearance of the seat headrest, but also can be applied to high backrest occasions. Preferably, the first rear ear piece 340 and the second rear ear piece 320 respectively overlap with the side edge portions of the rear cover 330 to form overlapping areas 350 to cover the gap. Further, the overlapping area 350 formed by the overlap of the first rear ear piece 340 with the side edge portion of the rear cover 330 can be formed by extending the first rear ear piece 340 inwardly, or by extending the side edge of the rear cover 330 outwardly, and similarly, the overlapping area 350 formed by the overlap of the second rear ear piece 320 with the side edge portion of the rear cover 330 can be formed by extending the second rear ear piece 320 inwardly, or by extending the side edge of the rear cover 330 outwardly. Among them, Figure 2 and Figure 4 the overlapping area 350 formed by extending the side edge of the rear cover 330 outwardly is inserted into the inside of the corresponding first rear ear piece 340 during assembly. And Figures 8-11 the overlapping area 350 formed by extending the first rear ear piece 340 inwardly is inserted into the inside of the side edge of the rear cover 330 during assembly. Preferably, the overlapping area 350 is configured as a circular arc surface formed around the axis of the corresponding second pivot shaft 120. Through the design of the circular arc surface of the overlapping area 350, the overlapping area 350 covering the gap can always keep consistent with the curve of the back face of the headrest during the adjustment of the side wings, which can ensure the aesthetic appearance of the seat headrest whether it is connected to the top or the front of the backrest assembly 6.

[0054] Preferably, as shown in Figure 2 and Figure 4As shown, a pair of second reset tension springs 150 are hung between the first front ear 110 and the back cover 330 and between the second front ear 140 and the back cover 330 for side wing adjustment rotation reset. Each pair of second reset tension springs 150 is arranged in an up-down interval. A first reset tension spring 160 is also hung between the front cover 130 and the base 310 to realize the swing reset of the tilt adjustment. Preferably, one first reset tension spring 160 is hung between the two sides of the front cover 130 and the base 310 to ensure the stability when they rotate relative to each other.

[0055] In the embodiment, the front cover 130 and the base 310 are pivoted by the first rotating shaft 170 between the top portions, and the bottom portions of the front cover 130 and the base 310 are provided with a sliding limiting structure matched with each other to avoid the left-right shaking of the front cover 130 when it rotates relative to the base 310, and to limit the overturning range of the front cover 130. Specifically, as shown in Figure 12 and Figure 13 The sliding limiting structure includes a clamping piece 1301 fixed on the front cover 130 and extending towards the base 310, and a blocking point 3101 fixed on the base 310 correspondingly. The extending end of the clamping piece 1301 is formed with a hook portion. When the front cover 130 swings relative to the base 310 to the maximum set angle, the blocking point 3101 and the hook portion of the clamping piece 1301 are blocked with each other to prevent the front cover 130 from continuing to swing.

[0056] The angle variable connection of the headrest cover relative to the base 310 in the embodiment is realized by the rotating shaft assembly. In some embodiments, the angle variable connection of the headrest cover relative to the base 310 can also be realized by a convex pin and a sliding groove matching mechanism which can slide relative to each other along a certain arc. Only the convex pin needs to be arranged on the front cover 130 / base 310, and the arc-shaped sliding groove for the sliding matching of the convex pin needs to be arranged on the base 310 / front cover 130. For the connection realized by the convex pin and the sliding groove matching mechanism, the above-mentioned blocking point 3101 and clamping piece 1301 can be directly formed on the convex pin and the sliding groove.

[0057] The headrest inclination adjustment and the headrest wing adjustment of the headrest of the embodiment are both pneumatic adjustment, and the air bag is accommodated in the cavity formed between the headrest cover body and the base 310. Compared with the pneumatic adjustment mode of simply ejecting the surface sleeve, the air bag has a larger supporting amount, which ensures the comfort of adjustment. Of course, the above embodiment is only a preferred embodiment, and in actual application, adjustments can be made as needed. For example, in some embodiments, only one of the headrest inclination adjustment and the headrest wing adjustment can be adopted by pneumatic adjustment, and the other can be achieved by a mechanical adjustment with a damping part. It should be noted that for the case of pneumatic adjustment, the corresponding first shaft 170 or second shaft 120 is only a conventional shaft, which can achieve relative rotation. For the case of mechanical adjustment, the corresponding first shaft 170 or second shaft 120 needs to be provided with a damping part. Specifically, as shown in Figure 3 For example, the headrest wing adjustment adopts a mechanical adjustment mode, the second shaft 120 includes a shaft body 1201 and a damping part 1202 sleeved on the outer periphery of the shaft body 1201, and as shown in Figure 2 A pair of shaft holes are formed on both sides of the front cover 130, and the two ends of the two shaft bodies 1201 are respectively inserted into the two pairs of shaft holes to achieve fixed connection with the front cover 130. The two damping parts 1202 are respectively fixedly connected with the first front ear piece 110 and the second front ear piece 140. When the headrest wing adjustment is needed, the first front ear piece 110 and / or the second front ear piece 140 are manually bent to rotate relative to the front cover 130, and the corresponding set of damping parts 1202 will generate a damping force relative to the shaft body 1201, so as to achieve the purpose of unilateral or bilateral wing adjustment. If the headrest inclination adjustment adopts a mechanical adjustment mode, the first shaft 170 is adjusted to have a damping part and is cooperatively arranged between the front cover 130 and the base 310. In addition to the mechanical adjustment achieved by the shaft with the damping part, a conventional mechanical locking structure (such as a motor cooperating with a screw rod, a gear and a rack, etc.) can also be used instead of the air bag installed in the cavity between the front cover 130 and the base 310, and acting on the front cover 130 and the base 310 to drive the front cover 130 to swing relative to the first shaft 170. The mechanical locking structure can also achieve automatic adjustment.

[0058] The second embodiment also achieves the headrest wing adjustment and the headrest inclination adjustment by the pneumatic mechanism assembly 20. Compared with the first embodiment, the difference lies in the installation position of the air pump assembly. Specifically, Figure 18 and Figure 19As shown, in the present embodiment, the air pump assembly is installed between the base plate 250 and the base 310, which includes an air pump 270 and an air valve 280 connected with the air pump 270, both of which are rigidly fixed on the base 310 by screws 290, and the air valve 280 is provided with three branch pipes, the air pipe 220 of the first air bag 230 and the two second air bags 210 are connected with the three branch pipes of the air valve 280 one by one through the second opening 2501 on the base plate 250, and the opening and closing of the three branch pipes are realized through the air valve 280, thereby realizing the selective inflation of the air pump 270 to the first air bag 230 and the two second air bags 210. In addition, the air pump 270 is also provided with an air pump wire harness 260, which is connected to the air pump wire harness 260 of the power supply outside the seat headrest through the third opening 3102 and the first opening 3302, so as to realize the power supply to the air pump 270.

[0059] It should be noted that, in addition to setting the air pump assembly in the seat back or seat headrest as in the first and second embodiments, the air pipes 220 can also be used to directly communicate each air bag to the external whole vehicle air source. In addition, by adopting the pneumatic mechanism assembly 20, the first and second embodiments can realize automatic control of the headrest side wing adjustment and the headrest inclination adjustment. For example, if the first pivot shaft 170 between the front cover 130 and the top of the base 310 in the first and second embodiments is pivoted, and the convex pin and sliding groove cooperation mechanism is used for sliding connection, and the corresponding front cover 130 and the bottom of the base 310 also use the same convex pin and sliding groove cooperation mechanism for sliding connection, then automatic control of the headrest side wing adjustment and the headrest translation adjustment can be realized. When the front cover 130 moves to the preset most forward position relative to the base 310, the corresponding stop point 3101 and the hook part of the clamping part 1301 are clamped to prevent the front cover 130 from continuing to move forward. The occupant can use a remote device to control the headrest inclination / translation and the turning angle of any side wing, which is more convenient to operate, avoids the need to consider the hand adjustment force value when manually adjusting the headrest side wing by using the traditional pivot shaft and damping part cooperation, cannot bear greater misuse force and is thus mispressed back, has poor support, is difficult to meet the needs of all consumers in the market, and avoids the problems of the traditional mechanical headrest inclination adjustment mechanism, such as being limited by mechanical locking and limiting structure, needing to split the stroke into multiple stop positions, and having a not smooth enough adjustment process.

[0060] The third embodiment differs from the first embodiment in that the seat headrest of the present embodiment only has a headrest inclination adjustment function. Specifically, referring to Figure 1 , Figure 20 and Figure 21As shown, the rotation shaft assembly in the headrest assembly 1 only includes the first rotation shaft 170, and the air bag only includes the first air bag 230. The headrest cover includes a front cover 130 and a rear cover 330 fixedly connected with the front cover 130. The front cover 130 is fixedly connected with the rear cover 330 through buckling, and the front cover 130 is rotatably connected with the base 310 through the first rotation shaft 170. The front cover 130 and the rear cover 330 cooperatively form a cavity with the base 310, and the first air bag 230 is accommodated 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 headrest inclination adjustment. The rear cover 330 is provided with a first opening 3302 through which the base 310 passes, so that the rear cover 330 can move relative to the base 310 with the front cover 130 at a variable angle. In this embodiment, the first air bag 230 is used for headrest inclination adjustment, the base 310 is fixedly connected with a base plate 250 on the side facing the front cover 130, the first air bag 230 is hung between the base plate 250 and the front cover 130, and the first air bag 230 is also provided with an air pipe 220 connected to the air pump assembly, so that the air pump assembly can selectively inflate the first air bag 230. When the first air bag 230 is inflated and expanded, the front cover 130 is pushed forward, and the rear cover 330 is driven to rotate relative to the base 310, thereby realizing headrest inclination adjustment. Preferably, a first reset tension spring 160 is hung between the front cover 130 and the base 310 to realize swing reset of inclination adjustment. Preferably, one first reset tension spring 160 is hung between each side of the front cover 130 and the base 310 to ensure the stability of relative rotation therebetween. For this embodiment, the rotation shaft assembly can also be replaced by a protruding pin and sliding slot cooperation mechanism.

[0061] The fourth embodiment is different from the third embodiment only in that the seat headrest also has a sound function. Specifically, referring to Figure 22 and Figure 23 As shown, the sound assembly 40 is fixedly connected with the front cover 130 through screws. When the front cover 130 and the rear cover 330 rotate relative to the base 310, the two sound assemblies 40 move, so that the headrest can still maintain sound effect after headrest inclination adjustment.

[0062] The fifth embodiment is different from the first embodiment only in that the seat headrest only has a headrest side wing adjustment function. Specifically, referring to Figure 1 , Figure 24 and Figure 25As shown, the rotation shaft assembly in the headrest assembly 1 only includes the second rotation shaft 120, and the air bag only includes the 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 is fixedly connected to the base 310 by buckling. The left and right sides of the front cover 130 are respectively pivotally connected to the first front ear piece 110 and the second front ear piece 140 through the second rotation shaft 120. The first front ear piece 110 is fixedly connected to the first rear ear piece 340 by buckling. The first front ear piece 110 and the first rear ear piece 340 together form a side wing. The second front ear piece 140 is fixedly connected to the second rear ear piece 320 by buckling. The second front ear piece 140 and the second rear ear piece 320 together form another side wing. The number of the second air bag 210 is two, and the two second air bags 210 are respectively arranged between the first front ear piece 110 and the base 310 and between the second front ear piece 140 and the base 310 to drive the side wings to rotate relative to the front cover 130 (i.e., relative to the base 310), thereby achieving the adjustment of the swing angle of the side wings, i.e., the adjustment of the headrest side wings. In the present embodiment, the two second air bags 210 are used for the adjustment of the headrest side wings, and are respectively hung 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. The two second air bags 210 are respectively provided with air pipes 220 connected to the air pump assembly installed on the backrest assembly 6. The air pump assembly can selectively inflate the two second air bags 210. After the second air bag 210 is inflated, the volume of the second air bag 210 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 refer to the positional relationship between the first front ear piece 110 and the rear cover 330 in the first embodiment, i.e. Figure 16 and Figure 17As shown. In this embodiment, when adjusting the headrest side wings, the first front ear piece 110 and the second front ear piece 140 are rotatably connected to the front cover 130, while 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, respectively. Therefore, 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 groove mating mechanism.

[0063] The sixth embodiment differs from the fifth embodiment only in that the headrest of the seat in this embodiment also has an audio function. For details, please refer to [link / reference needed]. Figure 26 and Figure 27 As shown, 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 sound effect after the side wing is adjusted.

[0064] The present invention 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 invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. An adjustable seat headrest, characterized by, The adjustable seat headrest comprises: a headrest cover; a base connected with a seat back, the headrest cover being movable relative to the base; a gas bag arranged between the headrest cover and the base to drive the movement adjustment of the headrest cover relative to the base.

2. The adjustable seat headrest of claim 1, wherein, 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; the gas bag being arranged in the cavity to drive the angular adjustment of the front cover relative to the base.

3. The adjustable seat headrest of claim 2, wherein, The headrest cover further comprises a rear cover cooperating with the front cover to form the cavity with the base, the rear cover being fixedly connected with the front cover, and the rear cover being provided with an opening through which the base passes, so that the rear cover can move angularly relative to the base along with the front cover.

4. The adjustable seat headrest of claim 1, wherein, The headrest cover comprises: a front cover fixedly connected with the base; and side wings arranged on the left and right sides of the front cover, the side wings being angularly movable relative to the front cover, and the gas bag being arranged between the base and the side wings to drive the angular adjustment of the side wings relative to the base.

5. The adjustable seat headrest of claim 4, wherein: The side wings comprise front ear pieces and rear ear pieces fixedly connected with the front ear pieces, the front ear pieces being angularly movable relative to the front cover, and the gas bag being arranged between the front ear pieces and the base to drive the angular adjustment of the side wings relative to the base.

6. The adjustable seat headrest of claim 1, wherein: 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 side wings arranged on the left and right sides of the front cover, the side wings being angularly movable relative to the front cover; the gas bag comprises a first gas bag arranged in the cavity to drive the angular adjustment of the front cover relative to the base.

7. The adjustable seat headrest of claim 6, wherein, Further comprising a first return tension spring, one end of the first return tension spring being connected with the front cover, and the other end being connected with the base.

8. The adjustable seat headrest of claim 6, wherein, The headrest cover further comprises a rear cover cooperating with the front cover to form the cavity with the base, the rear cover being fixedly connected with the front cover, and the rear cover being provided with an opening through which the base passes, so that the rear cover can move angularly relative to the base along with the front cover.

9. The adjustable seat headrest of claim 8, wherein, The gas bag further comprises a second gas bag arranged between the side wings and the rear cover to drive the angular adjustment of the side wings relative to the front cover.

10. The adjustable seat headrest of claim 9, wherein, The side wings comprise front ear pieces and rear ear pieces fixedly connected with the front ear pieces, the front ear pieces being angularly movable relative to the front cover, and the second gas bag being arranged between the front ear pieces and the rear cover to drive the angular adjustment of the side wings relative to the front cover.

11. The adjustable seat headrest of claim 10, wherein, Further comprising a second return tension spring, one end of the second return tension spring being connected with the front ear pieces, and the other end being connected with the rear cover.

12. The adjustable seat headrest of claim 10, wherein, The rear ear pieces and the side edge portions of the rear cover partially overlap to form an overlapping area.

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