CN117360348A

CN117360348A - Headrest structure is supported to car seat back

Info

Publication number: CN117360348A
Application number: CN202311567997.4A
Authority: CN
Inventors: 吴应举; 黄云; 杨木森
Original assignee: Hefei Changqing Machinery Co Ltd
Current assignee: Hefei Changqing Machinery Co Ltd
Priority date: 2023-11-23
Filing date: 2023-11-23
Publication date: 2024-01-09

Abstract

The invention discloses a headrest supporting structure of an automobile seat backrest, and relates to the technical field of automobile seats. According to the invention, the push-pull plate moves backwards, so that the push-pull plate drives the second air bag to move backwards, the second air bag contacts and abuts against the soft sealing plate at the rear, the air pressure of the second air bag is conveyed to the first air bags at the two sides, the second air bag is far away from the front surface of the soft pillow outer sleeve, the central part of the front surface of the soft pillow outer sleeve is recessed inwards, the soft pillow outer sleeve is integrally formed into a state with the middle recessed and the two sides protruding, when a driver or a passenger lies on the seat body, the shape of the soft pillow outer sleeve can be effectively fixed on the cervical vertebra, the comfort of the headrest in use in a stationary stable state of the vehicle is improved, and the burden of the cervical vertebra in rest is reduced.

Description

Headrest structure is supported to car seat back

Technical Field

The invention relates to the technical field of automobile seats, in particular to a headrest supporting structure for an automobile seat backrest.

Background

The automobile seat is a part of an automobile cab, and consists of four parts, namely a headrest, a back plate, a sitting basin and an adjusting device according to the components, wherein the automobile seat can be divided into a split seat and a long seat according to the shape; the functions can be divided into fixed type, detachable type and adjustable type; the seats can be classified into single, double and multiple seats according to the number of passengers, wherein the headrest is a very effective safety arrangement, and the neck of the passengers can be effectively protected in the event of rear-end collision.

In the prior art, for example, the Chinese patent number is: "an automobile seat headrest structure" of CN116279032a includes a headrest body, a bracket, and a front-rear driving device; the headrest body comprises a support member for supporting the head, and the support member is arranged on the bracket in a back-and-forth movement manner; the front-back driving device comprises a driving motor, a first screw rod and a first sliding block; the body of the driving motor is arranged on the bracket; the first screw rod is in transmission connection with an output shaft of the driving motor; the first sliding block is matched and screwed outside the first screw rod; the first sliding block is connected with the supporting piece; the bracket is provided with a front limit part and a rear limit part which are respectively arranged at the front and the rear of the first sliding block; the front limiting part is used for propping against the first sliding block to prevent the first sliding block from continuously moving forwards; the rear limiting part is used for propping against the first sliding block to prevent the first sliding block from continuing to move backwards.

However, in the prior art, the appearance of the headrest is generally designed into a fixed shape, the outer surface of the headrest is of a bump-shaped structure, the headrest with the shape is particularly large in buffering space, an effective protection effect can be achieved during driving, and the loss in the car accident process is reduced.

Disclosure of Invention

The invention aims to provide a headrest structure for supporting a backrest of an automobile seat, which aims to solve the problems that the prior headrest provided by the background art has poor fixing effect, and the head is separated from the surface of the headrest due to the arc-shaped convex surface of the headrest when a passenger is at rest in the automobile, particularly after the passenger falls asleep, and the cervical vertebra burden is caused by the increase of the posture for a long time.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an automobile seat back supports headrest structure, includes the headrest subassembly, the headrest subassembly includes soft pillow overcoat and soft shrouding, the inside of soft pillow overcoat is provided with the cover shell, the cover shell inside wall is provided with the second gasbag, both sides of second gasbag all are provided with first gasbag, the intercommunication has the hose between first gasbag and the second gasbag, the lateral wall of soft shrouding with the lateral wall fixed connection of soft pillow overcoat;

the lower part of headrest subassembly is provided with the back of the body and holds in the palm the subassembly, the back of the body holds in the palm the subassembly and includes the bracket, soft pillow overcoat's bottom with bracket fixed connection, the bracket with be provided with the push-and-pull board between the soft shrouding, the equal swing joint of both sides of push-and-pull board has the hinge, the push-and-pull board passes through the hinge rotates and is connected with the turn board, the turn board with soft shrouding fixed connection, the push-and-pull board with fixedly connected with first spliced pole between the cover shell, the bottom fixedly connected with fourth free bearing of bracket, the bottom swing joint of fourth free bearing has the second lift post.

Preferably, a seat body is arranged below the bottom end of the headrest assembly, a containing cavity is formed in the outer side wall of the seat body, and a transmission assembly is arranged in the containing cavity.

Preferably, the transmission assembly comprises a cylinder, the cylinder is fixedly connected with the inner bottom wall of the accommodating cavity, the output end of the cylinder is fixedly connected with a supporting plate, the top end of the supporting plate is fixedly connected with a push rod, and the top end of the push rod penetrates through the top wall of the accommodating cavity and extends to the top end of the seat body.

Preferably, the side wall of the turning plate is fixedly connected with a first rotating seat, the side wall of the bracket is fixedly connected with a second rotating seat, and the first rotating seat is rotationally connected with the second rotating seat.

Preferably, the outer side wall of the second lifting column is in sliding connection with the inner side wall of the ejector rod, one side of the supporting plate is provided with a lifting plate, and a second connecting column is fixedly connected between the lifting plate and the supporting plate.

Preferably, the outer side wall of the accommodating cavity is fixedly connected with a hard sealing plate, a movable groove is formed in the surface of the hard sealing plate, and the outer side wall of the second connecting column is in sliding connection with the movable groove.

Preferably, a linkage assembly is arranged at the center of the top surface of the lifting plate, the linkage assembly comprises a first lifting column and a first lifting cylinder, and a second hinge seat is fixedly connected to the outer side wall of the first lifting cylinder.

Preferably, the outer side wall of the first lifting column is slidably connected with the inner side wall of the first lifting cylinder, and the top end of the first lifting column is movably connected with a third hinged support.

Preferably, the top end of the third hinged support is fixedly connected with the bottom end of the bracket, a transmission rod is arranged on the outer side of the bracket, and the top end of the transmission rod is rotatably connected with the first hinged support.

Preferably, the bottom of the transmission rod is rotatably connected with the second hinged support, and a sliding column is fixedly connected between the first hinged support and the lifting plate.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the push-pull plate is moved backwards, so that the push-pull plate drives the second air bag to move backwards, the second air bag contacts and abuts against the soft sealing plate at the rear, the air pressure of the second air bag is conveyed to the first air bags at the two sides, the second air bag is far away from the front surface of the soft pillow outer sleeve, the central part of the front surface of the soft pillow outer sleeve is recessed inwards, the soft pillow outer sleeve integrally forms a state with the middle recessed and the two sides protruding, when a driver or a passenger lies on the seat body, the shape of the soft pillow outer sleeve can be used for fixing cervical vertebra later, the comfort level of the headrest in a static and stable state of a vehicle is improved, and the burden of cervical vertebra is reduced when the driver or the passenger rests.

2. According to the invention, the positions of the brackets are changed by moving the height positions of the supporting plates, so that the positions of the headrest assembly and the backboard are adjustable, the headrest assembly can be effectively adapted to drivers with different upper body lengths, and when the stroke of the first lifting column or the second lifting column is arbitrarily adjusted, the brackets can rotate relative to the backboard of the seat body, so that different supporting angles are formed between the soft pillow outer sleeve and the backboard, and the headrest can play a role in protecting when the drivers rest in different sitting postures.

3. According to the invention, the first lifting column is downwards contained in the first lifting cylinder through operation, so that the bracket inclines forwards to protect the cervical vertebra, and the bracket and the lifting plate are linked through the transmission rod, so that the sliding column is pulled backwards by the first hinged support, and the sliding plate is pulled backwards by the sliding column, thereby realizing the effect of automatic deformation of the soft pillow outer sleeve, and being convenient for flexibly adjusting the appearance of the headrest under different use conditions to achieve the optimal protection effect.

Drawings

FIG. 1 is a schematic perspective view of a headrest structure for supporting a backrest of a vehicle seat according to the present invention;

FIG. 2 is a schematic perspective view of a headrest structure for supporting a backrest of an automobile seat according to the second embodiment of the present invention;

FIG. 3 is a schematic view showing the internal structure of the receiving cavity in the headrest structure for supporting the backrest of the vehicle seat according to the present invention;

FIG. 4 is a schematic view of a transmission assembly in a headrest structure for supporting a seat back of an automobile in accordance with the present invention;

FIG. 5 is a partially exploded view of a back rest assembly of an automotive seat back support headrest structure according to the present invention;

FIG. 6 is a schematic view of a back rest assembly in an automotive seat back support headrest structure according to the present invention;

fig. 7 is a schematic view showing the internal structure of a soft pillow cover in a headrest structure for supporting a backrest of an automobile seat according to the present invention.

In the figure: 1. a seat body; 2. a headrest assembly; 21. a soft pillow cover; 22. soft sealing plates; 23. a casing; 24. a first air bag; 25. a second air bag; 26. a first connection post; 3. a transmission assembly; 31. a first hinge support; 32. a transmission rod; 33. a lifting plate; 34. a linkage assembly; 341. a second hinge support; 342. a first lifting column; 343. a third hinge support; 344. a first lifting cylinder; 35. a cylinder; 36. a push rod; 37. a supporting plate; 38. a second connection post; 4. a back support assembly; 41. a bracket; 42. a fourth hinge support; 43. a second lifting column; 44. a push-pull plate; 45. a turning plate; 46. a first rotating seat; 47. a second rotating seat; 48. a sliding column; 49. a hinge; 5. a hard sealing plate; 50. a movable groove; 6. the cavity is accommodated.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

According to the figures 1-7: the utility model provides a car seat back supports headrest structure, includes headrest subassembly 2, and headrest subassembly 2 includes soft pillow overcoat 21 and soft shrouding 22, and the inside of soft pillow overcoat 21 is provided with the cover shell 23, and the cover shell 23 inside wall is provided with second gasbag 25, and both sides of second gasbag 25 are provided with first gasbag 24, and the intercommunication has the hose between first gasbag 24 and the second gasbag 25, and the lateral wall of soft shrouding 22 and the lateral wall fixed connection of soft pillow overcoat 21;

the lower side of the headrest assembly 2 is provided with a back support assembly 4, the back support assembly 4 comprises a bracket 41, the bottom end of the soft pillow outer sleeve 21 is fixedly connected with the bracket 41, a push-pull plate 44 is arranged between the bracket 41 and the soft sealing plate 22, both sides of the push-pull plate 44 are movably connected with hinges 49, the push-pull plate 44 is rotatably connected with a turning plate 45 through the hinges 49, the turning plate 45 is fixedly connected with the soft sealing plate 22, a first connecting column 26 is fixedly connected between the push-pull plate 44 and the sleeve shell 23, the bottom end of the bracket 41 is fixedly connected with a fourth hinge support 42, and the bottom end of the fourth hinge support 42 is movably connected with a second lifting column 43.

In this embodiment, the headrest assembly 2 is used as a component of the seat body 1 and is matched with the seat body 1, the seat body 1 is used in a cockpit of an automobile, the headrest assembly 2 is connected with the seat body 1 through a fourth hinge support 42, the lower half part of the second lifting column 43 is inserted into the back plate of the seat body 1, and in the riding process of a driver, the positions of the headrest assembly 2 and the back plate of the seat body 1 can be adjusted according to different heights of the driver, so that the headrest assembly 2 can be adjusted to the optimal position by the personnel with different heights for use;

the soft pillow outer cover 21 and the soft sealing plate 22 are made of soft sponge materials, the soft pillow outer cover 21 and the soft sealing plate 22 integrally form a headrest with hollow inside, so that the soft pillow outer cover 21 and the soft sealing plate 22 can deform, the inside of the soft pillow outer cover 21 consists of three air bags with variable volume sizes, namely a second air bag 25 positioned in the middle and first air bags 24 positioned at two sides, other spaces in the soft pillow outer cover 21 are filled with filling materials such as plush and the like, the first air bags 24 and the second air bags 25 are connected through hoses, and the total air quantity in the three air bags is a fixed value, in other words, the internal air pressures of the first air bags 24 and the second air bags 25 are equal no matter what state the first air bags 24 and the second air bags 25 are positioned;

in the initial state, as the second air bag 25 is limited by the casing 23, the jacking thickness of the second air bag 25 is larger than the regular thickness of the first air bag 24, so that the whole soft pillow outer cover 21 presents a shape with raised middle and leveling at two ends, at the moment, the buffering space of the second air bag 25 for the head of a driver is larger, so that the second air bag 25 jolts on the road surface during driving to play a role in buffering protection for the driving, the injury caused by collision of passengers or drivers is avoided, when the automobile stops midway, the casing 23 is pulled out backwards when the driver or the passengers rest in the automobile, the second air bag 25 is in contact with and abutted against the soft sealing plate 22 at the rear, at the moment, the second air bag 25 is pressed by the soft sealing plate 22 at the rear, the air pressure of the second air bag 25 is conveyed to the first air bags 24 at the two sides, at the same time, the second air bag 25 is far away from the front surface of the soft pillow outer cover 21, the front surface of the soft pillow outer cover 21 is inwards recessed, and the first air bags 24 at the two sides are inflated outwards. At this time, the soft pillow cover 21 is integrally formed into a state of concave middle and convex two sides, and when a driver or a passenger lies on the seat body 1, the shape of the soft pillow cover 21 can be used for fixing cervical vertebra, so that the comfort level of the headrest in use in a stationary and stable state of the vehicle is improved.

Example two

According to the figures 3, 4 and 6, a seat body 1 is arranged below the bottom end of a headrest assembly 2, a containing cavity 6 is formed in the outer side wall of the seat body 1, and a transmission assembly 3 is arranged in the containing cavity 6. The transmission assembly 3 comprises an air cylinder 35, the air cylinder 35 is fixedly connected with the inner bottom wall of the accommodating cavity 6, the output end of the air cylinder 35 is fixedly connected with a supporting plate 37, the top end of the supporting plate 37 is fixedly connected with a push rod 36, and the top end of the push rod 36 penetrates through the top wall of the accommodating cavity 6 and extends to the top end of the seat body 1. The lateral wall of the turning plate 45 is fixedly connected with a first turning seat 46, the lateral wall of the bracket 41 is fixedly connected with a second turning seat 47, and the first turning seat 46 is rotationally connected with the second turning seat 47. The outer side wall of the second lifting column 43 is in sliding connection with the inner side wall of the ejector rod 36, one side of the supporting plate 37 is provided with a lifting plate 33, and a second connecting column 38 is fixedly connected between the lifting plate 33 and the supporting plate 37.

In this embodiment, the included angle between the seat basin and the back plate of a general car seat is adjustable, so as to adapt to the adaptation degree of the seat and a person under different sitting postures, meanwhile, in order to adjust the use state of the headrest in cooperation with the posture of the seat, the position of the headrest under different sitting postures is satisfied, the ergonomic is more fit, the included angle between the front surface of the headrest assembly 2 and the back plate of the seat is also adjustable, the bracket 41 is arranged below the headrest assembly 2, the bracket 41 plays a role in supporting and fixing the headrest assembly 2 above, the bracket 41 is connected with two fourth hinge brackets 42 and one linkage assembly 34, the bottom end of the fourth hinge bracket 42 is connected with the second lifting column 43, the second lifting column 43 is located above the supporting plate 37, the height of the soft pillow outer sleeve 21 can be adjusted by moving the height of the lifting plate 33 and the supporting plate 37, and the soft pillow outer sleeve 21 can be effectively adapted to the driver with different upper body lengths.

Example III

According to fig. 2, 3, 5 and 6, the outer side wall of the accommodating cavity 6 is fixedly connected with a hard sealing plate 5, the surface of the hard sealing plate 5 is provided with a movable groove 50, and the outer side wall of the second connecting column 38 is slidably connected with the movable groove 50. The center of the top surface of the lifting plate 33 is provided with a linkage assembly 34, the linkage assembly 34 comprises a first lifting column 342 and a first lifting cylinder 344, and the outer side wall of the first lifting cylinder 344 is fixedly connected with a second hinge seat 341. The outer side wall of the first lifting column 342 is slidably connected with the inner side wall of the first lifting cylinder 344, and the top end of the first lifting column 342 is movably connected with a third hinge base 343. The top end of the third hinge seat 343 is fixedly connected with the bottom end of the bracket 41, the outer side of the bracket 41 is provided with a driving rod 32, and the top end of the driving rod 32 is rotatably connected with the first hinge seat 31. The bottom end of the transmission rod 32 is rotatably connected with the second hinge seat 341, and a sliding column 48 is fixedly connected between the first hinge seat 31 and the lifting plate 33.

In this embodiment, when the inclination angle between the soft pillow cover 21 and the back plate of the seat body 1 needs to be adjusted, the length of the second lifting column 43 located in the ejector rod 36 or the length of the first lifting column 342 located in the first lifting cylinder 344 can be adjusted arbitrarily, the third hinge seat 343 and the fourth hinge seat 42 together form the lower supporting plane of the bracket 41, and when the height positions of the third hinge seat 343 and the fourth hinge seat 42 are changed at the same time, that is, when the positions of the lifting plate 33 and the supporting plate 37 are adjusted only by driving the air cylinder 35, the inclination angle between the soft pillow cover 21 and the back plate of the seat body 1 is not changed, and when the stroke of the first lifting column 342 or the second lifting column 43 is adjusted arbitrarily, the bracket 41 rotates relative to the back plate of the seat body 1, so that the soft pillow cover 21 supports the head of a user in different states;

according to the rest habit of a general person, the body posture is always inclined backwards when the person lies on the seat, at this time, the included angle between the back plate of the seat body 1 and the seat basin is increased, in order to simulate the lying posture when the person lies on the bed, the surface of the soft pillow cover 21 needs to be adjusted to be parallel to the back plate of the seat body 1, namely, the soft pillow cover 21 is inclined backwards, in this rest state, the first lifting column 342 is downwards contained in the first lifting cylinder 344 through operation, so that the bracket 41 and the seat back plate form a plane, at this time, the distance between the lifting plate 33 and the bracket 41 is reduced, because the bracket 41 and the lifting plate 33 form linkage through the transmission rod 32, the length of the transmission rod 32 is unchanged, only the distance between the hinge point of the first hinge seat 31 and the bracket 41 is increased, so that the sliding column 48 is pulled backwards by the sliding column 48, the soft pillow cover 21 is adjusted and deformed, and the soft pillow cover 21 is changed from the middle bulge to the middle bulge state and the two ends bulge state, thereby being more beneficial to the rest of a driver and passengers.

The application method and the working principle of the device are as follows: before sitting, the positions of the lifting plate 33 and the supporting plate 37 are adjusted by driving the air cylinder 35, the heights of the lifting plate 33 and the supporting plate 37 can be adjusted by moving the heights of the soft pillow outer cover 21, and the headrest is adjusted to a proper protection height;

when the automobile is driven, the first lifting column 342 is lifted upwards, and as the third hinge support 343 and the fourth hinge support 42 jointly form a lower supporting plane of the bracket 41, when the first lifting column 342 drives the third hinge support 343 to lift upwards, the bracket 41 inclines forwards to support the cervical vertebra, the distance between the lifting plate 33 and the bracket 41 is increased, the distance between the hinge point of the first hinge support 31 and the bracket 41 is reduced, and the first hinge support 31 pushes the sliding column 48 forwards;

then, the sliding column 48 pushes the push-pull plate 44 forwards, the push-pull plate 44 drives the sleeve shell 23 to drive the middle of the soft pillow outer sleeve 21 by using the first connecting column 26, the second air bag 25 is in a natural state, and the second air bag 25 is jacked up to be thicker than the first air bag 24 periodically due to the limiting effect of the sleeve shell 23, so that the soft pillow outer sleeve 21 integrally takes on the shape of middle bulge and leveling at two ends, and the headrest assembly 2 reserves enough buffer air to meet the protection requirement;

when a person takes a rest, the first lifting column 342 is stored in the first lifting cylinder 344 downwards through operation, so that the bracket 41 inclines forwards to support the cervical vertebra, at this time, the distance between the lifting plate 33 and the bracket 41 is reduced, the length of the transmission rod 32 is unchanged, only the hinge point of the first hinge seat 31 can be increased from the bracket 41 due to the fact that the transmission rod 32 is linked between the bracket 41 and the lifting plate 33, the first hinge seat 31 pulls the sliding column 48 backwards, the sliding column 48 pulls the push-pull plate 44 backwards, the soft pillow outer sleeve 21 is adjusted to deform, the soft pillow outer sleeve 21 is converted into a state of concave middle and convex two sides from the middle, and the cervical vertebra is fixedly supported by the middle concave of the headrest assembly 2.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. A car seat back support headrest structure, comprising a headrest assembly (2), characterized in that: the headrest assembly (2) comprises a soft pillow outer sleeve (21) and a soft sealing plate (22), a casing (23) is arranged inside the soft pillow outer sleeve (21), a second air bag (25) is arranged on the inner side wall of the casing (23), first air bags (24) are arranged on two sides of the second air bag (25), a hose is communicated between the first air bags (24) and the second air bags (25), and the outer side wall of the soft sealing plate (22) is fixedly connected with the side wall of the soft pillow outer sleeve (21);

the lower part of headrest subassembly (2) is provided with back of body holds in palm subassembly (4), back of body holds in palm subassembly (4) including bracket (41), the bottom of soft pillow overcoat (21) with bracket (41) fixed connection, bracket (41) with be provided with push-and-pull board (44) between soft shrouding (22), the both sides of push-and-pull board (44) all swing joint has hinge (49), push-and-pull board (44) are passed through hinge (49) rotation is connected with turn board (45), turn board (45) with soft shrouding (22) fixed connection, push-and-pull board (44) with fixedly connected with first spliced pole (26) between cover (23), the bottom fixedly connected with fourth hinge seat (42) of bracket (41), the bottom swing joint of fourth hinge seat (42) has second lift post (43).

2. A car seat back support headrest structure according to claim 1, wherein: the novel headrest is characterized in that a seat body (1) is arranged below the bottom end of the headrest assembly (2), a containing cavity (6) is formed in the outer side wall of the seat body (1), and a transmission assembly (3) is arranged in the containing cavity (6).

3. A car seat back support headrest structure as claimed in claim 2, wherein: the transmission assembly (3) comprises an air cylinder (35), the air cylinder (35) is fixedly connected with the inner bottom wall of the accommodating cavity (6), the output end of the air cylinder (35) is fixedly connected with a supporting plate (37), the top end of the supporting plate (37) is fixedly connected with a push rod (36), and the top end of the push rod (36) penetrates through the top wall of the accommodating cavity (6) and extends to the top end of the seat body (1).

4. A car seat back support headrest structure according to claim 1, wherein: the side wall of the turning plate (45) is fixedly connected with a first rotating seat (46), the side wall of the bracket (41) is fixedly connected with a second rotating seat (47), and the first rotating seat (46) is rotationally connected with the second rotating seat (47).

5. A car seat back support headrest structure as claimed in claim 3, wherein: the outer side wall of the second lifting column (43) is in sliding connection with the inner side wall of the ejector rod (36), one side of the supporting plate (37) is provided with a lifting plate (33), and a second connecting column (38) is fixedly connected between the lifting plate (33) and the supporting plate (37).

6. A car seat back support headrest structure according to claim 5, wherein: the outer side wall of the accommodating cavity (6) is fixedly connected with a hard sealing plate (5), a movable groove (50) is formed in the surface of the hard sealing plate (5), and the outer side wall of the second connecting column (38) is in sliding connection with the movable groove (50).

7. A car seat back support headrest structure according to claim 5, wherein: the top surface central point of lifter plate (33) puts and is provided with linkage subassembly (34), linkage subassembly (34) are including first lift post (342) and first lift section of thick bamboo (344), the lateral wall fixedly connected with second hinge (341) of first lift section of thick bamboo (344).

8. A car seat back support headrest structure according to claim 7, wherein: the outer side wall of the first lifting column (342) is in sliding connection with the inner side wall of the first lifting cylinder (344), and a third hinge seat (343) is movably connected to the top end of the first lifting column (342).

9. A car seat back support headrest structure according to claim 8, wherein: the top of the third hinged support (343) is fixedly connected with the bottom of the bracket (41), a transmission rod (32) is arranged on the outer side of the bracket (41), and the top of the transmission rod (32) is rotatably connected with the first hinged support (31).

10. A car seat back support headrest structure according to claim 9, wherein: the bottom end of the transmission rod (32) is rotationally connected with the second hinged support (341), and a sliding column (48) is fixedly connected between the first hinged support (31) and the lifting plate (33).