CN220682225U - Headrest driving mechanism of automobile seat and automobile seat - Google Patents

Abstract

The utility model provides a headrest driving mechanism of an automobile seat and the automobile seat. The headrest driving mechanism includes a back plate, a driving assembly, and a connecting member. The driving assembly is arranged inside the backrest and comprises a supporting member, a connecting rod driving member, a sliding member and a sliding driving member. The connecting member is in a rod-shaped structure, one end of the connecting member is rotatably connected with the supporting member, and the other end of the connecting member is fixedly connected with the lower end of the headrest. When the automobile collides, the sliding driving member pushes the sliding member to slide along the backboard, and the connecting rod driving member drives the supporting member to move between a first position close to the backboard and a second position far away from the backboard. And the linkage connecting member rotates around a rotating shaft which is rotationally connected with the supporting member and drives the headrest to rotate, so that the headrest can move from the rear part of the seat to the front part of the seat when the automobile collides, and the damage of the collision to the neck of an occupant is reduced.

Description

Headrest driving mechanism of automobile seat and automobile seat

Technical Field

The utility model relates to the technical field of automobile seats, in particular to a headrest driving mechanism of an automobile seat and the automobile seat.

Background

The automobile seat is the first medium for the contact between the passenger and the automobile, and the structural design directly influences the comfort and safety of the passenger. The headrest of the automobile seat can support the neck and the head of the passenger, and the neck safety of the passenger is ensured. For the consideration of comfort of passengers, a certain gap is reserved between the existing seat headrest and the heads of the passengers when the existing seat headrest is designed. However, upon impact, the occupant's head may quickly pass through the gap to contact the headrest, which may exacerbate whiplash injury to the occupant's neck.

In order to reduce whiplash injury of the headrest to the neck of an occupant when an automobile collides, the clearance between the headrest and the head of the occupant can be properly reduced when a part of automobile seats are designed, so that the acceleration, the speed and the displacement difference of the head, the chest and the spine of the occupant are smaller when the automobile collides, and the injury of the headrest to the neck of the occupant is reduced. However, the gap between the headrest and the head of the occupant becomes smaller, which greatly affects the riding comfort and driving comfort of the occupant.

In order to ensure the riding comfort of the passengers and reduce the injuries of the headrest to the neck of the passengers during collision, the active headrest becomes an important research direction of the automobile seat. The active headrest can rapidly and actively move forwards in collision, so that the head of an occupant is towed, and whiplash injury of the headrest to the head and the neck of the occupant is reduced.

The active headrest in the prior art includes both an airbag type and a mechanical type. The air bag type active headrest is characterized in that an air bag is arranged on the front face of the headrest, and the air bag is exploded and drags the head of an occupant during collision. However, the airbag has a momentary large impact at the time of ignition, which may cause rapid rebound of the head of the occupant, which may exacerbate injury to the neck of the occupant. The mechanical active headrest is driven to move forward by driving the backrest of the seat, so that the headrest moves forward. However, this approach requires a relatively high hysteresis and a relatively long time due to the need to first control the back and forth movement of the seat back.

Therefore, the existing active headrest has the problems of low safety and low response speed.

Disclosure of Invention

The utility model aims to solve the problems of low safety and low response speed of an active headrest in the prior art.

In order to solve the above problems, an embodiment of the present utility model discloses a headrest driving mechanism of an automobile seat, the automobile seat includes a seat body, and a headrest is rotatably provided at a backrest top of the seat body; the headrest driving mechanism includes a back plate, a driving assembly, and a connecting member: the backboard is fixedly arranged in the middle of the inner side of the backrest of the seat body and extends along the extending direction of the backrest; the drive assembly is disposed inside the backrest and located on one side of the back plate, and includes a support member, a link drive member, a slide member, and a slide drive member.

Wherein the support member is located at a position opposite to the back plate in the thickness direction of the backrest, and is located at a first position close to the back plate or a second position away from the back plate in the thickness direction; the sliding component is arranged on the backboard in a sliding manner along the height direction; the connecting rod driving component comprises at least one connecting rod, one end of the connecting rod driving component is connected with the sliding component, and the other end of the connecting rod driving component is connected with the supporting component; the sliding driving member is arranged on the back plate, connected with the sliding member and drives the sliding member to slide along the extending direction of the back plate, and the linkage supporting member moves between a first position and a second position.

The connecting member has a rod-shaped structure, one end of the connecting member is rotatably connected with the supporting member, and the other end of the connecting member is fixedly connected with the lower end of the headrest.

By adopting the scheme, when the automobile collides, the sliding driving member can push the sliding member to slide along the extending direction of the backboard, and when the sliding member slides, the connecting rod driving member connected with the sliding member can drive the supporting member to move between the first position close to the backboard and the second position far away from the backboard. When the supporting member moves, the connecting member rotatably connected with the top end of the supporting member rotates around the rotating shaft rotatably connected with the connecting member, and then the headrest fixed at the other end of the connecting member is driven to rotate, so that the headrest can rotate from the rear part of the seat to the front part of the seat when the automobile collides. Because the headrest has the mode of forward and backward movement, the headrest can well support the head of an occupant when collision occurs, and the damage of the collision to the neck of the occupant can be reduced. The headrest driving mechanism has the characteristics of small injury to the neck of the passenger and high response speed.

According to another embodiment of the present utility model, a headrest driving mechanism of an automobile seat disclosed in an embodiment of the present utility model, a link driving member includes a first link provided between a back plate and a support member; the sliding member includes a first slider that is slidable in a height direction of the back plate.

One end of the first connecting rod is rotatably connected with the first sliding block, and the other end of the first connecting rod is connected with the supporting member; the driving assembly further comprises a first sliding rod and a first energy absorbing component; the first fixing block and the second fixing block are respectively arranged on one side of the backboard and near the upper end and the lower end of the backboard; one end of the first sliding rod is fixed with the backboard through a first fixed block, and the other end of the first sliding rod is fixedly connected with the sliding driving member; the sliding driving component is fixedly connected with the backboard through a second fixed block; the first sliding block is sleeved on the periphery of the first sliding rod in a sliding manner; the first energy absorbing component is fixedly arranged between the first sliding block and the first fixed block and/or the sliding driving component.

By adopting the scheme, the connecting rod driving component is arranged as one connecting rod, so that the structure is simple, and the manufacturing cost is saved; and moreover, one connecting rod is utilized to drive the supporting member to move, and only the one connecting rod is required to be driven and controlled, so that the response speed is high.

According to another specific embodiment of the utility model, the headrest driving mechanism of the automobile seat disclosed by the embodiment of the utility model is characterized in that the sliding driving member is a gunpowder driver; the first energy absorption component is a spiral spring sleeved on the periphery of the first sliding rod, and two ends of the first energy absorption component are respectively connected with the first sliding block and the first fixed block; or the first energy absorbing component is a spiral spring sleeved on the periphery of the first sliding rod, and two ends of the first energy absorbing component are respectively connected with the first sliding block and the sliding driving component; or, the first energy absorbing component is two spiral springs sleeved on the periphery of the first sliding rod, two ends of one spiral spring are respectively connected with the sliding block and the first fixed block, and two ends of the other spiral spring are respectively connected with the sliding block and the sliding driving component.

By adopting the scheme, the sliding driving component is arranged as the gunpowder driver, and the gunpowder is detonated at a higher speed, so that the rotation speed of the headrest can be improved.

According to another embodiment of the present utility model, the headrest driving mechanism for an automobile seat disclosed in the embodiment of the present utility model has a plate-like structure, the other end of the first link is rotatably and slidably connected to the support member, and the other end is located at a first movement position or a second movement position lower than the first movement position in the height direction of the support member; alternatively, the support member is a block member having a size corresponding to the other end of the first link, and the other end of the first link is rotatably connected to the support member.

By adopting the scheme, the supporting member is arranged into the plate-shaped structure, the stability of the plate-shaped structure is higher, the plate-shaped structure has higher movement precision during movement, and the supporting of the head of the passenger is more accurate. The block structure has smaller volume and higher flexibility, can have higher reaction speed during movement, and improves the response speed to the head support of the passenger during collision.

According to another embodiment of the present utility model, the headrest driving mechanism of the automobile seat disclosed in the embodiment of the present utility model, the support member has a plate-like structure; the connecting rod driving component comprises a second connecting rod and a third connecting rod which are arranged between the back plate and the supporting component; the sliding component comprises a second sliding block and a third sliding block which can relatively slide along the height direction of the backboard;

one end of the second connecting rod and one end of the third connecting rod are respectively and rotatably connected with the second sliding block and the third sliding block, and the other end of the second connecting rod and the other end of the third connecting rod are slidably arranged at one side of the supporting member at intervals; the second link and the third link are equal in length and the middle portions are rotatably connected together via the first rotating member.

By adopting the scheme, the connecting rod driving component is arranged to comprise the second connecting rod and the third connecting rod, and the middle parts of the second connecting rod and the third connecting rod are rotatably connected together, so that the number of the connecting rods is small, the control of the connecting rods is easier, and the quick response can be realized. And, compare with single connecting rod, the stability of two connecting rods is better for this headrest actuating mechanism has stronger stability.

According to another embodiment of the present utility model, the headrest driving mechanism of the automobile seat disclosed in the embodiment of the present utility model, the support member has a plate-like structure; the connecting rod driving component comprises at least two groups of connecting rod assemblies which are arranged between the back plate and the supporting component and are sequentially connected in the thickness direction of the back plate; the sliding component comprises a fourth sliding block and a fifth sliding block which can relatively slide along the height direction of the backboard; each group of connecting rod assemblies comprises two connecting rods with equal lengths and the middle parts of the connecting rods are rotatably connected together through a second rotating part.

And one end of the two connecting rods in the head-end connecting rod assembly closest to the back plate is fixedly connected with the fourth sliding block and the fifth sliding block respectively, and the other end of the two connecting rods is rotatably connected with one end of the two connecting rods corresponding to the middle connecting rod assembly adjacent to the head-end connecting rod assembly; one end of each of the two connecting rods in the end connecting rod assembly closest to the supporting member is rotatably connected with the other end of the corresponding two connecting rods of the middle connecting rod assembly adjacent to the end connecting rod assembly, and the other end of the corresponding two connecting rods is slidably arranged at one side of the supporting member at intervals; the end parts of the intermediate connecting rod assemblies positioned between the head connecting rod assembly and the tail connecting rod assembly are rotatably connected with the end parts of the adjacent intermediate connecting rod assemblies.

By adopting the scheme, the connecting rod driving component is arranged to comprise a plurality of groups of connecting rod assemblies formed by the second connecting rod and the third connecting rod, and the middle parts of the connecting rod assemblies are rotatably connected together, so that the stability is higher. And because the connecting rod combination body can have longer movable range between backplate and supporting member, also can drive the headrest and have great back-and-forth movement space, guaranteed the supporting effect to the passenger's head when collision takes place.

According to another specific embodiment of the utility model, the headrest driving mechanism of the automobile seat disclosed by the embodiment of the utility model is characterized in that the driving component is arranged on one side of the back plate facing the rear part of the automobile seat, and the driving component further comprises a second sliding rod and a second energy absorbing component; and, the slide driving member includes a first driving part and a second driving part. The first driving component and the second driving component are respectively fixed at one side of the backboard and respectively close to the upper end and the lower end of the backboard through a corresponding third fixing block and a corresponding fourth fixing block; two ends of the second sliding rod are fixedly connected with the first driving part and the second driving part respectively; two sliding blocks fixedly connected with the end part of the connecting rod driving component are movably sleeved on the periphery of the second sliding rod; the second energy absorption component is fixedly arranged between the two sliding blocks; the second energy absorbing component is a spiral spring sleeved on the periphery of the second sliding rod; the first driving part and the second driving part are both gunpowder drivers.

By adopting the scheme, through the arrangement of the energy absorbing component, when the headrest is contacted with the head of the passenger, the energy of the backward movement of the head can be absorbed by utilizing the energy absorbing component, so that the protection degree of the neck of the passenger is further improved.

According to another specific embodiment of the utility model, the headrest driving mechanism of the automobile seat disclosed by the embodiment of the utility model is characterized in that the driving assembly is arranged on one side of the back plate facing the front part of the automobile seat, and the driving assembly further comprises a third sliding rod, a third energy absorbing component and a fourth energy absorbing component.

And, the slide driving member includes a third driving part; two ends of the third sliding rod are fixed on one side of the backboard through a fifth fixed block and a sixth fixed block respectively; two sliding blocks fixedly connected with the end parts of the connecting rod driving components are movably sleeved on the periphery of the third sliding rod; the third energy absorption component is arranged between the fifth fixed block and one of the sliding blocks; the fourth energy absorption component is arranged between the sixth fixed block and the other sliding block; one of the two sliding blocks is closer to the fifth fixed block, and the other sliding block is closer to the sixth fixed block; the sliding driving member is sleeved and fixed on the periphery of the third sliding rod between the two sliding blocks; the third energy absorbing component and the fourth energy absorbing component are spiral springs sleeved on the periphery of the third sliding rod; two ends of the third energy absorption component are fixedly connected with the fourth fixed block and one of the sliding blocks respectively; two ends of the fourth energy absorption component are fixedly connected with the fifth fixed block and the other sliding block respectively. And, the slide driving member is a powder driver.

According to another embodiment of the present utility model, a headrest driving mechanism for an automobile seat according to an embodiment of the present utility model includes a headrest body and an extension rod extending from the headrest body to a lower end of the headrest body. The periphery of the upper cross beam of the seat backrest is rotatably provided with a rotating shaft assembly, and the rotating shaft assembly comprises a rotating part and a fixing part; the movable part is sleeved on the periphery of the upper cross beam, and the fixed part is fixedly connected with the rotating part; wherein, the connecting member is in a rod-shaped structure, one end of the connecting member is rotatably connected with the supporting member, and the other end of the connecting member is fixedly connected with the rotating part; the extension rod extends out of the end of the headrest body and is slidably connected with the fixing portion.

The fixing part is of a block structure, and a through hole matched with the extension rod is arranged in the fixing part; the inner wall of the through hole and the outer wall of the extension rod are respectively provided with a clamping protrusion and a groove in a matching way.

By adopting the scheme, the rotating shaft assembly is rotatably arranged on the periphery of the upper cross beam of the automobile seat backrest, and the headrest can be driven to rotate through the rotation of the rotating part, so that the headrest can move forwards and backwards; the extension rod is slidably connected with the fixing part, so that the headrest can be driven to move up and down. Therefore, the height and the front and back positions of the headrest can be adjusted according to the riding requirements of passengers, and the riding comfort is improved.

Embodiments of the present utility model disclose a car seat including the headrest driving mechanism of the car seat as described in any of the above embodiments.

The beneficial effects of the utility model are as follows:

according to the headrest driving mechanism of the automobile seat, when an automobile collides, the sliding driving member of the headrest driving mechanism can push the sliding member to slide along the extending direction of the backboard, and when the sliding member slides, the connecting rod driving member connected with the sliding member can drive the supporting member to move between the first position close to the backboard and the second position far away from the backboard. When the supporting member moves, the connecting member rotatably connected with the top end of the supporting member rotates around the rotating shaft rotatably connected with the connecting member, and then the headrest fixed at the other end of the connecting member is driven to rotate, so that the headrest can rotate from the rear part of the seat to the front part of the seat when the automobile collides. Because the headrest has the mode of forward and backward movement, the headrest can well support the head of an occupant when collision occurs, and the damage of the collision to the neck of the occupant can be reduced. In addition, since the shape of the headrest is not changed as compared with the airbag provided in the related art, the headrest driving mechanism does not generate an instantaneous large impact like the airbag is exploded, and the injuries of the headrest to the neck of the occupant can be reduced to the maximum extent. In addition, this headrest actuating mechanism can directly drive the headrest and rotate to make the headrest have back and forth movement, compare in controlling the back, and then drive the mode that the headrest removed, this headrest actuating mechanism is also faster because can directly drive the headrest rotation.

Drawings

FIG. 1 is a schematic view of a car seat according to an embodiment of the present utility model;

fig. 2 is a schematic motion diagram of a headrest driving mechanism of an automobile seat according to an embodiment of the present utility model;

FIG. 3 is a schematic view of another construction of an automobile seat according to an embodiment of the present utility model;

fig. 4 to 7 are schematic structural views of a headrest driving mechanism of an automobile seat according to the present embodiment of the utility model;

fig. 8 is a schematic view showing the movement of a headrest driving mechanism of an automobile seat according to an embodiment of the present utility model;

fig. 9 and 10 are schematic structural views of a headrest driving mechanism of an automobile seat according to the present embodiment of the utility model.

Reference numerals illustrate:

1. a seat body; 2. a headrest; 3. a back plate; 4. a drive assembly; 5. a connecting member; 6. a support member; 7. a link driving member; 8. a sliding member; 9. a slide driving member; 10. a headrest body; 11. an extension rod; 12. a rotating part; 13. a fixing part; 14. an upper cross beam; 15. a first link; 16. a first slider; 17. a first slide bar; 18. a first energy absorbing component; 19. a second link; 20. a third link; 21. a second slider; 22. a third slider; 24. a fourth slider; 25. a fifth slider; 26. a second slide bar; 27. a second energy absorbing component; 28. a third slide bar; 29. a third energy absorbing component; 30. a fourth energy absorbing component; 31. a first fixed block; 32. a second fixed block; 33. a third fixed block; 34. a fourth fixed block; 35. a fifth fixed block; 36. a sixth fixed block; 37. a first rotating member; 38. a first driving part; 39. a second driving part; 40. a third driving part; 41. a second rotating member; 42. a head end connecting rod assembly; 43. an intermediate link assembly; 44. and a terminal connecting rod assembly.

Detailed Description

Example 1:

in order to solve the problems of low safety and low response speed of an active headrest in the prior art, the embodiment provides a headrest driving mechanism of an automobile seat. Specifically, referring to fig. 1, the car seat includes a seat body 1, and a headrest 2 is rotatably provided at a backrest top portion of the seat body 1. More specifically, referring to fig. 1, the headrest driving mechanism is a combination of members shown within a broken line frame, which includes a back plate 3, a driving assembly 4, and a connection member 5. The back plate 3 is used for supporting and fixing the driving component 4, the driving component 4 is used for driving the connecting component 5 to move, the connecting component 5 is used for being connected with the headrest 2, and the headrest 2 is driven to rotate back and forth when the driving component 4 moves.

Further, in the headrest driving mechanism of the car seat according to the present utility model, referring to fig. 1, the back plate 3 is fixedly provided in the middle of the back inner side of the seat body 1, extending in the extending direction of the back. For the headrest driving mechanism, the back plate 3 is also kept stationary while the driving assembly 4 and the connecting member 5 are moved. The back plate 3 can be fixed with other parts inside the backrest in a threaded manner.

The drive assembly 4 is disposed inside the backrest on one side of the back plate 3 and includes a support member 6, a link drive member 7, a slide member 8, and a slide drive member 9. The sliding driving member 9 is used for driving the sliding member 8 to move so as to drive the connecting rod driving member 7 to rotate, and then the linkage supporting member 6 moves relative to the backboard 3, so that the headrest 2 rotates.

Specifically, referring to fig. 1, the support member 6 is located at a position opposite to the back plate 3 in the thickness direction of the backrest, and, referring to fig. 2, the support member 6 may be located at a first position (left side of fig. 2) close to the back plate 3 or a second position (right side of fig. 2) distant from the back plate 3 in the thickness direction. With continued reference to fig. 1, the slide member 8 is provided slidably in the height direction on the back plate 3. The link driving member 7 includes at least one link, one end of the link driving member 7 is connected to the sliding member 8, and the other end of the link driving member 7 is connected to the supporting member 6. The slide driving member 9 is provided on the back plate 3, is connected to the slide member 8 and drives the slide member 8 to slide in the extending direction of the back plate 3, and moves the interlocking support member 6 between the first position and the second position shown in fig. 2.

Still further, in the headrest driving mechanism of the car seat according to the present utility model, referring to fig. 1, the connection member 5 has a rod-like structure, and one end of the connection member 5 is rotatably connected with the support member 6, and the other end is fixedly connected with the lower end of the headrest 2. Specifically, one end of the connecting member 5 is rotatably connected to the top end of the support member 6 via a revolute pair, and the other end thereof may be fixed to the lower end of the headrest 2 by being screwed to other components in the headrest 2.

With such a structure, when the automobile collides, the slide driving member 9 can push the slide member 8 to slide along the extending direction of the back plate 3, and when the slide member 8 slides, the link driving member 7 connected with the slide member 8 can drive the support member 6 to move between the first position close to the back plate 3 and the second position far from the back plate 3. When the support member 6 moves, the connection member 5 rotatably connected to the top end of the support member 6 rotates about the rotation shaft rotatably connected to the connection member 5 about the support member 6, thereby driving the headrest 2 fixed to the other end of the connection member 5 to rotate, so that the headrest 2 can move from the rear portion of the seat to the front portion of the seat when the automobile collides. Since the headrest 2 has such a forward and backward movement, it can support the head of the occupant well when a collision occurs, and the damage of the collision to the neck of the occupant can be reduced. In addition, since the shape of the headrest 2 does not change as compared with the airbag provided in the related art, the headrest driving mechanism does not generate an instantaneous large impact like the airbag is exploded, and the neck injury of the occupant by the headrest 2 can be reduced to the maximum extent. In addition, this headrest actuating mechanism can directly drive headrest 2 rotation to make headrest 2 have the back and forth movement, compare in controlling the back, and then drive the mode that headrest 2 removed, this headrest actuating mechanism is also faster because can directly drive headrest 2 rotation.

Further, in the headrest driving mechanism of the car seat according to the present utility model, referring to fig. 3, the headrest 2 includes a headrest body 10 and an extension rod 11 extending from the headrest body 10 to the lower end of the headrest body 10. The outer periphery of the upper cross member 14 of the backrest is rotatably provided with a rotation shaft assembly including a rotation portion 12 and a fixing portion 13. The rotating part 12 is sleeved on the periphery of the upper beam 14, and the fixing part 13 is fixedly connected with the rotating part 12. Specifically, the fixing portion 13 and the rotating portion 12 may be integrally formed in a conventional fixed connection manner in the art, and because the fixing portion 13 and the rotating portion 12 are fixedly connected, the rotating portion 12 rotates around the upper beam 14, and the fixing portion 13 is also driven to rotate around the upper beam 14.

Still further, in the headrest driving mechanism of the car seat according to the present utility model, the connecting member 5 has a rod-like structure, one end of the connecting member 5 is rotatably connected to the support member 6, and the other end is fixedly connected to the rotating portion 12. The extension rod 11 extends out of the end of the headrest body 10 and is slidably connected with the fixing portion 13. The fixing connection manner of the connecting member 5 and the extension rod 11 may be welding, integral molding, or the like.

Further, in the headrest driving mechanism of the car seat according to the present utility model, the fixing portion 13 has a block-like structure, and a through hole adapted to the extension rod 11 is provided in the fixing portion 13. In particular, the radius of the through hole is approximately the same as or slightly larger than the extension rod 11. The inner wall of the through hole and the outer wall of the extension rod 11 are respectively provided with a clamping protrusion and a groove in a matching way. Specifically, the inner wall of the through hole is provided with a clamping protrusion, the outer wall of the extension rod 11 is provided with a groove, and the inner wall of the through hole is provided with a groove, and the outer wall of the extension rod 11 is provided with a clamping protrusion.

With such a structure, the rotation shaft assembly is rotatably provided at the outer periphery of the upper cross member 14 of the automobile seat back, and the headrest 2 is rotated by the rotation of the rotation portion 12, so that the headrest 2 can be moved forward and backward; the headrest 2 can be driven to move up and down by slidably connecting the extension rod 11 with the fixing portion 13. So that the height and the front-rear position of the headrest 2 can be adjusted according to the riding requirements of the occupant, improving riding comfort.

It should be noted that the provision of the spindle assembly is only a preferred embodiment of the present utility model. If the spindle assembly is not provided, the extension rod 11 is directly fixed with the connection member 5, that is, the function of the headrest 2 movable up and down and back and forth via the spindle assembly is eliminated, and the headrest 2 can still be moved back and forth by the headrest driving mechanism. And, when the extension rod 11 and the connecting member 5 are directly fixed, they may be in a horizontal rod-shaped structure, or the extension rod 11 and the connecting member 5 may be disposed to have an included angle therebetween according to actual arrangement requirements (for example, as shown in fig. 1).

It should be noted that the headrest driving mechanism in this embodiment drives the headrest 2 to move after the collision occurs, and how to judge the collision belongs to the technical field that can be set according to the actual requirements. For example, collision sensors mounted in front and rear of the vehicle body are connected to the vehicle-mounted ECU to collect front and rear collision signals, while the slide driving member 9 is connected to the vehicle-mounted ECU to control the triggering of the slide driving member 9 by the vehicle-mounted ECU. When the vehicle-mounted ECU detects the collision signal, it indicates that the collision occurs, and at this time, the vehicle-mounted ECU sends a trigger signal to the slide driving member 9 so that the slide driving member 9 drives the slide member 8 to slide in the height direction of the back plate 3.

Next, a specific implementation of the drive assembly 4 will be described.

In one implementation, referring to fig. 4, in this implementation, the drive assembly 4 is disposed on the right side of the back plate 3, and the link drive member 7 includes only one link.

Specifically, the link driving member 7 includes a first link 15 provided between the back plate 3 and the support member 6. The slide member 8 includes a first slider 16 slidable in the height direction of the back plate 3. One end of the first link 15 is rotatably connected to the first slider 16, and the other end is connected to the support member 6. More specifically, one end of the first link 15 may be rotatably connected to the first slider 16 through a rotation shaft assembly, and the other end may also be rotatably connected to the support member 6 through a rotation shaft assembly.

Specifically, the drive assembly 4 further comprises a first slider bar 17 and a first energy absorbing member 18. A first fixing block 31 and a second fixing block 32 are respectively arranged on one side of the backboard 3 and near the upper end and the lower end of the backboard 3. One end of the first slide bar 17 is fixed to the back plate 3 via a first fixing block 31, and the other end is fixedly connected to the slide driving member 9. The slide driving member 9 is fixedly connected with the back plate 3 via a second fixing block 32. The first slider 16 is slidably sleeved on the outer periphery of the first slide bar 17. The first energy absorbing component 18 is fixedly arranged between the first slider 16 and the first fixed block 31 and/or the sliding drive member 9. More specifically, the first and second fixing blocks 31 and 32 are welded or screwed to the back plate 3, and one end of the first slide bar 17 is inserted into the first fixing block 31 to be fixed, and the other end is inserted into the slide driving member 9 to be fixed. The slide driving member 9 is also screw-coupled or welded to the second fixing block 32. The first energy absorbing component 18 may be disposed between the first slider 16 and the first fixed mass 31 (i.e., the disposed position shown in FIG. 4). The first energy absorbing component 18 may also be arranged between the first slider 16 and the sliding drive member 9 (this is not shown in fig. 4). Of course, the first energy absorber 18 may also be arranged both between the first slider 16 and the sliding drive member 9 and between the first slider 16 and the first fixed mass 31.

Specifically, the slide driving member 9 is a powder driver.

Specifically, the first energy absorbing component 18 is a coil spring sleeved on the outer periphery of the first sliding rod 17, and two ends of the first energy absorbing component are respectively connected to the first sliding block 16 and the first fixed block 31. Alternatively, the first energy absorbing component 18 is a coil spring which is sleeved on the outer periphery of the first sliding rod 17, and two ends of the first energy absorbing component are respectively connected with the first sliding block 16 and the sliding driving member 9. Alternatively, the first energy absorbing component 18 is two spiral springs sleeved on the periphery of the first sliding rod 17, wherein two ends of one spiral spring are respectively connected with the first sliding block 16 and the first fixed block 31, and two ends of the other spiral spring are respectively connected with the first sliding block 16 and the sliding driving member 9. Of course, the first energy absorbing component 18 is a coil spring sleeved on the periphery of the first sliding rod 17, which is a preferred implementation of this embodiment, and those skilled in the art can also set the coil spring on one side of the first sliding rod 17; of course, other components capable of absorbing energy may be selected, such as rubber rods or latex rods.

More specifically, the first slide bar 17 is provided in this embodiment, so that the sliding of the first slider 16 can be facilitated. The first energy absorbing member 18 is provided, so that the impact force received by the head of the occupant can be absorbed by the first energy absorbing member 18 after the head of the occupant contacts the headrest 2 in the event of a collision of the vehicle, and the injury to the neck of the occupant can be further reduced. Also, the first energy absorbing component 18 may be in a stretched state when no impact occurs; when a collision occurs, the first energy absorbing component 18 is in a normal state; after the collision, the head of the occupant contacts the headrest 2, and the first energy absorbing member 18 absorbs the impact force of the head of the occupant, and the occupant is compressed. Of course, the state of the first energy absorbing member 18 may be changed from a compressed state to a normal state and then to a stretched state from the time of no collision to the time of collision.

In this implementation, after the automobile collides, the sliding driving member 9 drives the first slider 16 to slide on the first slide bar 17 along the height direction of the back plate 3, so as to drive the end of the first connecting rod 15 connected with the first slider 16 to move to the side far away from the back plate 3, and the supporting member 6 connected with the end of the first connecting rod 15 also links to the side far away from the back plate 3, so as to drive the connecting member 5 to rotate around the rotating shaft where the connecting member 5 is rotationally connected with the supporting member 6, so as to drive the headrest 2 to rotate from the position far away from the front of the automobile to the position close to the front of the automobile, and support the head of the passenger. When the headrest 2 contacts the head of the occupant, it is moved from a position near the front of the vehicle to a position far from the front of the vehicle by the head. This rotation of the headrest 2 moves the support member 6 toward the side close to the back plate 3, thereby driving the first slider 16 to slide in the direction opposite to the sliding direction at the time of collision, and absorbing energy at the time of rearward movement of the head of the occupant through the first energy absorbing member 18.

In a second implementation, referring to fig. 5, in this implementation the drive assembly 4 is arranged on the left side of the back plate 3, the link drive member 7 also comprising only one link, in the same way as in the first implementation.

Specifically, the link driving member 7 includes a first link 15 provided between the back plate 3 and the support member 6. The slide member 8 includes a first slider 16 slidable in the height direction of the back plate 3. One end of the first link 15 is rotatably connected to the first slider 16, and the other end is connected to the support member 6. The drive assembly 4 further comprises a first slider bar 17 and a first energy absorbing member 18. A first fixing block 31 and a second fixing block 32 are respectively arranged on one side of the backboard 3 and near the upper end and the lower end of the backboard 3. One end of the first slide bar 17 is fixed to the back plate 3 via a first fixing block 31, and the other end is fixedly connected to the slide driving member 9. The slide driving member 9 is fixedly connected with the back plate 3 via a second fixing block 32. The first slider 16 is slidably sleeved on the outer periphery of the first slide bar 17. The first energy absorbing component 18 is fixedly arranged between the first slider 16 and the first fixed block 31 and/or the sliding drive member 9.

In this embodiment, after the car collides, the sliding driving member 9 drives the first slider 16 to slide (move upward in fig. 5) along the height direction of the back plate 3 on the first slide bar 17, and further drives the end of the first link 15 connected to the first slider 16 to move to the side close to the back plate 3, and the supporting member 6 connected to the end of the first link 15 also moves to the side close to the back plate 3, so that the connecting member 5 is driven to rotate around the rotating shaft where the connecting member 5 is rotationally connected to the supporting member 6, and further drives the headrest 2 to rotate from the position far from the front of the car to the position close to the front of the car, and supports the head of the passenger. When the headrest 2 contacts the head of the occupant, it is moved from a position near the front of the vehicle to a position far from the front of the vehicle by the head. This rotation of the headrest 2 will move the support member 6 towards the side away from the back plate 3, thereby driving the first slider 16 to slide down in fig. 5 and absorbing energy from the rearward movement of the occupant's head through the first energy absorbing member 18.

In a third implementation, referring to fig. 4, the support member 6 is in the form of a block member corresponding in size to the other end of the first link 15, and the other end of the first link 15 is rotatably connected to the support member 6. The block-shaped component has smaller volume and higher flexibility and can have higher reaction speed during movement. Also, the support member 6 and the first link 15 may be rotatably connected via a rotation shaft assembly. It should be noted that, although fig. 4 shows an implementation in which the driving assembly 4 is disposed on the right side of the back plate 3, the structure of the support member 6 is equally applicable to an implementation in which the driving assembly 4 is disposed on the left side of the back plate 3.

In a fourth implementation, referring to fig. 5, the support member 6 has a plate-like structure, the other end of the first link 15 is rotatably and slidably connected to the support member 6, and the other end is located at a first movement position or a second movement position lower than the first movement position in the height direction of the support member 6. The stability of the plate-shaped structure is higher, and the plate-shaped structure has higher movement precision during movement. The support member 6 may be rotatably and slidably connected to the first link 15 by providing a slide groove on the surface of the support member 6 from the first movement position to the second movement position, attaching a pulley rotatable with respect to the first link 15 to the other end of the first link 15, and rotatably and slidably connecting the pulley to the slide groove. When the other end of the first link 15 is at the first movement position or the second movement position, the support member 6 is positioned at the corresponding first position or second position in the thickness direction. It should be noted that, although fig. 5 shows an implementation in which the driving assembly 4 is disposed on the left side of the back plate 3, the structure of the support member 6 is equally applicable to an implementation in which the driving assembly 4 is disposed on the right side of the back plate 3.

The implementation modes are all the case that the connecting rod driving component 7 is a connecting rod, the connecting rod driving component 7 is arranged as a connecting rod, the structure is simple, and the manufacturing cost is saved; and, the movement of the supporting member 6 is driven by one connecting rod, and only the one connecting rod is required to be driven and controlled, so that the response speed is high.

In a fifth implementation, referring to fig. 6, in this implementation the drive assembly 4 is provided on the right side of the back plate 3 and the link drive member 7 comprises two links.

Specifically, the support member 6 has a plate-like structure. The link driving member 7 includes a second link 19 and a third link 20 disposed between the back plate 3 and the support member 6. The slide member 8 includes a second slider 21 and a third slider 22 relatively slidable in the height direction of the back plate 3. One ends of the second link 19 and the third link 20 are rotatably connected to the second slider 21 and the third slider 22, respectively, and the other ends thereof are slidably provided at a spacing on one side of the support member 6. The second link 19 and the third link 20 are equal in length and are rotatably connected at their intermediate portions via a first rotating member 37. More specifically, the other ends of the second link 19 and the third link 20 are slidably connected to the support member 6, and also need to be rotatably connected to the support member 6, so that the second link 19 and the third link 20 can smoothly slide on the support member 6.

Further, the driving assembly 4 is provided at a side of the back plate 3 facing the rear of the car seat, and the driving assembly 4 further includes a second slider bar 26 and a second energy absorbing member 27. Further, the slide driving member 9 includes a first driving part 38 and a second driving part 39. Specifically, the first driving member 38 and the second driving member 39 are fixed to one side of the back plate 3 via the corresponding third fixing block 33 and fourth fixing block 34, respectively, at positions near the upper and lower ends of the back plate 3, respectively. The second slide bar 26 is fixedly connected at both ends to a first drive member 38 and a second drive member 39, respectively. A second slider 21 and a third slider 22 fixedly connected to the end of the link driving member 7 are movably sleeved on the outer periphery of the second slide bar 26. The second energy absorbing member 27 is fixedly disposed between the second slider 21 and the third slider 22.

More specifically, the second energy absorbing member 27 is a coil spring that is sleeved on the outer periphery of the second slider bar 26. The first drive member 38 and the second drive member 39 are both pyrotechnic drives.

In this embodiment, referring to fig. 2 and 6, after the collision of the automobile, first driving part 38 and second driving part 39 drive second slider 21 and third slider 22, respectively, to slide on second slide bar 26 in the height direction of back plate 3 (in this fig. 6, second slider 21 slides downward, and third slider 22 slides upward). The end of the second connecting rod 19 connected with the second slider 21 and the end of the third connecting rod 20 connected with the third slider 22 are driven to move to the side far away from the back plate 3, and the supporting member 6 connected with the ends of the second connecting rod 19 and the third connecting rod 20 is also linked to the side far away from the back plate 3, so that the connecting member 5 is driven to rotate around a rotating shaft which is rotationally connected with the supporting member 6 by the connecting member 5, and the headrest 2 is driven to rotate from a position far away from the front part of the automobile to a position close to the front part of the automobile, and the head of an occupant is supported. When the headrest 2 contacts the head of the occupant, it is moved from a position near the front of the vehicle to a position far from the front of the vehicle by the head. This rotation of the headrest 2 will drive the support member 6 to move toward the side close to the back plate 3, and thus drive the second slider 21 to slide upward in fig. 6, the third slider 22 to slide downward in fig. 6, and absorb energy when the head of the occupant moves rearward through the second energy absorbing member 27.

In the sixth implementation, referring to fig. 7, this implementation differs from the fifth implementation described above only in the location where the drive assembly 4 is disposed. That is, in the present embodiment, the driving assembly 4 is provided on the side of the back plate 3 facing the front of the car seat, and the structure of the link driving member 7 is the same as that in the fifth embodiment described above. And, the drive assembly 4 further comprises a third strut 28, a third energy absorbing member 29 and a fourth energy absorbing member 30. The slide driving member 9 includes a third driving part 40.

Specifically, both ends of the third slide bar 28 are fixed to one side of the back plate 3 via a fifth fixing block 35 and a sixth fixing block 36, respectively. The second slide block 21 and the third slide block 22 which are fixedly connected with the end parts of the second connecting rod 19 and the third connecting rod 20 are movably sleeved on the periphery of the third slide bar 28. The third energy absorbing component 29 is arranged between the fifth fixed block 35 and the second slider 21; the fourth energy absorbing member 30 is disposed between the sixth fixed block 36 and the third slider 22. The slide driving member 9 is fitted around the outer periphery of the third slide bar 28 fixed between the second slider 21 and the third slider 22.

More specifically, the third energy absorbing member 29 and the fourth energy absorbing member 30 are coil springs that are sleeved on the outer periphery of the third slider bar 28. Wherein, both ends of the third energy absorbing component 29 are fixedly connected with the fifth fixed block 35 and the second sliding block 21 respectively; both ends of the fourth energy absorbing component 30 are fixedly connected with the sixth fixed block 36 and the third slider 22, respectively.

More specifically, the slide driving member 9 is a powder driver.

In this embodiment, referring to fig. 7 and 8, after the collision of the automobile, the third driving part 40 drives the second slider 21 and the third slider 22 to slide on the third slide bar 28 in the height direction of the back plate 3 (in this fig. 7, the second slider 21 slides upward, and the third slider 22 slides downward). And further, the end of the second connecting rod 19 connected with the second slider 21 and the end of the third connecting rod 20 connected with the third slider 22 are driven to move to the side close to the back plate 3, and the supporting member 6 connected with the ends of the second connecting rod 19 and the third connecting rod 20 is also linked to the side close to the back plate 3, so that the connecting member 5 is driven to rotate around the rotating shaft which is rotationally connected with the supporting member 6 by the connecting member 5, and further, the headrest 2 is driven to rotate from a position far from the front part of the automobile to a position close to the front part of the automobile, and the head of the passenger is supported. When the headrest 2 contacts the head of the occupant, it is moved from a position near the front of the vehicle to a position far from the front of the vehicle by the head. This rotation of the headrest 2 will drive the support member 6 to move toward the side away from the back plate 3, and thus drive the second slider 21 to slide downward in fig. 7, the third slider 22 to slide upward in fig. 7, and absorb energy when the head of the occupant moves rearward through the third energy absorbing member 29 and the fourth energy absorbing member 30.

Further, with such a structure, the link driving member 7 is provided to include the second link 19 and the third link 20 whose intermediate portions are rotatably connected together, not only can a quick response be achieved, but also a stronger stability can be achieved as compared with a single link.

In a seventh implementation, referring to fig. 9, in this implementation, the driving assembly 4 is disposed on the right side of the back plate 3, and the link driving member 7 includes a plurality of sets of link assemblies composed of two links.

Further, in this implementation, the support member 6 has a plate-like structure. The link driving member 7 includes at least two sets of link assemblies disposed between the back plate 3 and the support member 6, which are sequentially connected in the thickness direction of the back plate 3. The slide member 8 includes a fourth slider 24 and a fifth slider 25 relatively slidable in the height direction of the back plate 3. Wherein each group of connecting rod assemblies comprises two connecting rods with equal length and the middle parts rotatably connected together through a second rotating part 41.

Further, one ends of the two links in the head-end link assembly 42 closest to the back plate 3 are fixedly connected to the fourth slider 24 and the fifth slider 25, respectively, and the other ends thereof are rotatably connected to one ends of the two links corresponding to the intermediate link assembly 43 adjacent to the head-end link assembly 42.

One end of the two links in the end link assembly 44 closest to the support member 6 is rotatably connected to the other end of the two links corresponding to the intermediate link assembly 43 adjacent to the end link assembly 44, and the other end is slidably disposed at a side of the support member 6 at a spacing.

The end portions of each intermediate link assembly 43 located between the head link assembly 42 and the tail link assembly 44 are rotatably connected to the end portions of the adjacent intermediate link assemblies 43.

Further, the drive assembly 4 is provided on the side of the back plate 3 facing the rear of the car seat. And, drive assembly 4 also includes a second strut 26 and a second energy absorbing member 27. Further, the slide driving member 9 includes a first driving part 38 and a second driving part 39. Specifically, the first driving member 38 and the second driving member 39 are fixed to one side of the back plate 3 via the corresponding third fixing block 33 and fourth fixing block 34, respectively, at positions near the upper and lower ends of the back plate 3, respectively. The second slide bar 26 is fixedly connected at both ends to a first drive member 38 and a second drive member 39, respectively.

Further, a fourth slider 24 and a fifth slider 25 fixedly connected to the end of the link driving member 7 are movably fitted around the outer periphery of the second slide bar 26. The second energy absorbing member 27 is fixedly disposed between the fourth slider 24 and the fifth slider 25.

More specifically, the second energy absorbing component 27 is a coil spring sleeved on the periphery of the second slide rod 26; the first drive member 38 and the second drive member 39 are both pyrotechnic drives.

In this implementation, referring to fig. 9, after the collision of the automobile, the first driving part 38 drives the fourth slider 24 to slide downward in the height direction of the back plate 3, while the second driving part 39 drives the fifth slider 25 to slide upward in the height direction of the back plate 3. The fourth slider 24 and the fifth slider 25 slide in opposite directions, and further drive the ends of the two links in the head link assembly 42 connected to the fourth slider 24 and the fifth slider 25 to move toward the side away from the back plate 3, and the distance between the ends of the two links becomes shorter as the distance between the fourth slider 24 and the fifth slider 25 becomes smaller, which causes the distance between the ends of the two links in the linkage intermediate link assembly 43 to become shorter and simultaneously move toward the side away from the back plate 3, and simultaneously causes the support member 6 connected to the ends of the two links in the end link assembly 44 to become shorter and drives the connection member 5 to rotate about the rotation axis of the connection member 5 and the support member 6, and further drives the headrest 2 to rotate from the position away from the front of the vehicle to the position close to the front of the vehicle, and support the head of the occupant. When the headrest 2 contacts the head of the occupant, it is moved from a position near the front of the vehicle to a position far from the front of the vehicle by the head. This rotation of the headrest 2 moves the support member 6 toward the side closer to the back plate 3, which in turn moves the fourth slider 24 to slide upward in fig. 9, the fifth slider 25 to slide downward in fig. 9, and absorbs energy of the rearward movement of the head of the occupant through the second energy absorbing member 27.

In an eighth implementation, referring to fig. 10, in this implementation, the drive assembly 4 is disposed on the left side of the back plate 3, i.e., the drive assembly 4 is disposed on the side of the back plate 3 that faces the front of the car seat. The structure of the link driving member 7 is the same as that of the link driving member 7 in the seventh embodiment described above, and also includes a plurality of sets of link assemblies composed of two links. And, the drive assembly 4 further comprises a third strut 28, a third energy absorbing member 29 and a fourth energy absorbing member 30.

Further, the slide driving member 9 includes a third driving part 40. Wherein, both ends of the third sliding rod 28 are fixed to one side of the back plate 3 via a fifth fixing block 35 and a sixth fixing block 36, respectively. A fourth slider 24 and a fifth slider 25 fixedly connected to the ends of the link driving member 7 are movably sleeved on the outer periphery of the third slide bar 28. The third energy absorbing member 29 is disposed between the fifth anchor 35 and the fourth slider 24. The fourth energy absorbing member 30 is disposed between the sixth fixed block 36 and the fifth slider 25.

Further, the third driving member 40 is fitted around the outer periphery of the third slide bar 28 fixed between the fourth slider 24 and the fifth slider 25. The third energy absorbing component 29 and the fourth energy absorbing component 30 are helical springs sleeved on the periphery of the third sliding rod 28. Specifically, the slide driving member 9 is a powder driver. Both ends of the third energy absorbing component 29 are fixedly connected with the fifth fixed block 35 and the fourth sliding block 24 respectively; both ends of the fourth energy absorbing component 30 are fixedly connected with the sixth fixed block 36 and the fifth slider 25, respectively.

In this embodiment, referring to fig. 10, after the collision of the automobile, the third driving part 40 drives the fourth slider 24 and the fifth slider 25 to slide on the third slide bar 28 in the height direction of the back plate 3 (in this fig. 10, the fourth slider 24 slides upward, and the fifth slider 25 slides downward). The fourth slider 24 and the fifth slider 25 slide toward the corresponding fixed blocks, respectively, and then drive the ends of the two links in the head link assembly 42 connected with the fourth slider 24 and the fifth slider 25 to move toward the side close to the back plate 3, and the distance between the ends of the two links becomes longer, which causes the distance between the ends of the two links in the linkage intermediate link assembly 43 to also become longer, and simultaneously move toward the side close to the back plate 3, and simultaneously causes the distance between the ends of the two links in the linkage end link assembly 44 to become longer, and drives the support member 6 connected with the ends of the two links in the end link assembly 44 to move toward the side close to the back plate 3, thereby driving the connection member 5 to rotate about the rotation shaft of the connection member 5 and the support member 6, and further driving the headrest 2 to rotate from a position away from the front of the vehicle to a position close to the front of the vehicle, and supporting the head of the occupant. When the headrest 2 contacts the head of the occupant, it is moved from a position near the front of the vehicle to a position far from the front of the vehicle by the head. This rotation of the headrest 2 will drive the support member 6 to move away from the back plate 3, and thus drive the fourth slider 24 to slide downward in fig. 10, the fifth slider 25 to slide upward in fig. 10, and absorb energy when the head of the occupant moves backward through the third energy absorbing member 29 and the fourth energy absorbing member 30.

Further, with such a structure, the link driving member 7 is provided to include the link assembly of the plurality of sets of the second link 19 and the third link 20, the middle portions of which are rotatably connected together, with higher stability. In addition, the connecting rod assembly can have a longer moving range between the backboard 3 and the supporting member 6, so that the headrest 2 can be driven to have a larger front-back moving space, and the supporting effect on the head of an occupant during collision is ensured.

Example 2:

based on the headrest driving mechanism of the automobile seat described above, the present embodiment also provides an automobile seat including the headrest driving mechanism of the automobile seat described in the above embodiment. The automobile seat comprises a seat body, wherein the seat body is connected with a headrest through the headrest driving mechanism, so that the headrest can rotate when an automobile collides, and further moves forwards to support the head of an occupant, and the damage of the collision to the neck of the occupant is reduced.

It is intended that other advantages and effects of the present utility model, in addition to those described in the specific embodiments, be readily apparent to those skilled in the art from the present disclosure. While the description of the utility model will be described in connection with the preferred embodiment, it is not intended to limit the utility model to the particular form disclosed. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The foregoing description contains many specifics, other embodiments, and examples of specific details for the purpose of providing a thorough understanding of the utility model. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

Claims (10)

1. A headrest driving mechanism of an automobile seat, the automobile seat comprising a seat body, characterized in that a headrest is rotatably provided on a backrest top of the seat body; the headrest driving mechanism includes a back plate, a driving assembly, and a connecting member: wherein the method comprises the steps of

The backboard is fixedly arranged in the middle of the inner side of the backrest of the seat body and extends along the extending direction of the backrest;

the driving assembly is arranged inside the backrest and positioned on one side of the backboard, and comprises a supporting member, a connecting rod driving member, a sliding member and a sliding driving member; wherein the method comprises the steps of

The support member is located at a position opposite to the back plate in a thickness direction of the backrest, and is located at a first position close to the back plate or a second position away from the back plate in the thickness direction;

the sliding member is slidably arranged on the backboard along the height direction;

the connecting rod driving member comprises at least one connecting rod, one end of the connecting rod driving member is connected with the sliding member, and the other end of the connecting rod driving member is connected with the supporting member;

the sliding driving member is arranged on the back plate, connected with the sliding member and drives the sliding member to slide along the extending direction of the back plate, and is linked with the supporting member to move between the first position and the second position; and is also provided with

The connecting member is in a rod-shaped structure, one end of the connecting member is rotatably connected with the supporting member, and the other end of the connecting member is fixedly connected with the lower end of the headrest.

2. The headrest driving mechanism for an automobile seat according to claim 1, wherein the link driving member includes a first link provided between the back plate and the support member;

the sliding member comprises a first sliding block capable of sliding along the height direction of the backboard; and is also provided with

One end of the first connecting rod is rotatably connected with the first sliding block, and the other end of the first connecting rod is connected with the supporting member; and is also provided with

The driving assembly further comprises a first sliding rod and a first energy absorbing component; and is also provided with

A first fixed block and a second fixed block are respectively arranged on one side of the backboard and close to the upper end and the lower end of the backboard;

one end of the first sliding rod is fixed with the back plate through the first fixed block, and the other end of the first sliding rod is fixedly connected with the sliding driving member;

the sliding driving component is fixedly connected with the backboard through the second fixed block;

the first sliding block is sleeved on the periphery of the first sliding rod in a sliding manner;

the first energy absorbing component is fixedly arranged between the first sliding block and the first fixed block and/or the sliding driving component.

3. The headrest driving mechanism for an automotive seat according to claim 2, wherein the slide driving member is a pyrotechnic actuator;

the first energy absorption component is a spiral spring sleeved on the periphery of the first sliding rod, and two ends of the first energy absorption component are respectively connected with the first sliding block and the first fixed block; or alternatively

The first energy absorption component is a spiral spring sleeved on the periphery of the first sliding rod, and two ends of the first energy absorption component are respectively connected with the first sliding block and the sliding driving member; or alternatively

The first energy absorbing component is two spiral springs sleeved on the periphery of the first sliding rod, two ends of one spiral spring are respectively connected with the first sliding block and the first fixed block, and two ends of the other spiral spring are respectively connected with the first sliding block and the sliding driving component.

4. The headrest driving mechanism for an automobile seat according to claim 3, wherein the support member has a plate-like structure, the other end of the first link is rotatably and slidably connected to the support member, and the other end is located at a first movement position or a second movement position lower than the first movement position in a height direction of the support member; or alternatively

The supporting member is a block member with a size corresponding to the other end of the first connecting rod, and the other end of the first connecting rod is rotatably connected with the supporting member.

5. The headrest driving mechanism for an automobile seat according to claim 1, wherein the support member has a plate-like structure;

the link driving member includes a second link and a third link disposed between the back plate and the support member;

the sliding member comprises a second sliding block and a third sliding block which can relatively slide along the height direction of the backboard;

one ends of the second connecting rod and the third connecting rod are respectively rotatably connected with the second sliding block and the third sliding block, and the other ends of the second connecting rod and the third connecting rod are slidably arranged at one side of the supporting member at intervals;

the second connecting rod and the third connecting rod are equal in length, and the middle parts of the second connecting rod and the third connecting rod are rotatably connected together through the first rotating part.

6. The headrest driving mechanism for an automobile seat according to claim 1, wherein the support member has a plate-like structure;

the connecting rod driving component comprises at least two groups of connecting rod assemblies which are arranged between the back plate and the supporting component and are sequentially connected in the thickness direction of the back plate;

The sliding member comprises a fourth sliding block and a fifth sliding block which can relatively slide along the height direction of the backboard; wherein the method comprises the steps of

Each group of connecting rod assemblies comprises two connecting rods with equal length and the middle parts rotatably connected together through a second rotating part; and is also provided with

One end of each of the two connecting rods in the head-end connecting rod assembly closest to the back plate is fixedly connected with the fourth sliding block and the fifth sliding block respectively, and the other end of each of the two connecting rods is rotatably connected to one end of each of the two connecting rods corresponding to the middle connecting rod assembly adjacent to the head-end connecting rod assembly;

one end of each of the two connecting rods in the end connecting rod assembly closest to the supporting member is rotatably connected with the other end of the corresponding two connecting rods of the middle connecting rod assembly adjacent to the end connecting rod assembly, and the other end of each of the two connecting rods is slidably arranged at one side of the supporting member at intervals;

the end parts of the intermediate connecting rod assemblies positioned between the head connecting rod assembly and the tail connecting rod assembly are rotatably connected with the end parts of the adjacent intermediate connecting rod assemblies.

7. The headrest driving mechanism for a car seat according to claim 5 or 6, wherein the driving assembly is provided on a side of the back plate facing a rear portion of the car seat, and the driving assembly further comprises a second slide bar and a second energy absorbing member; and is also provided with

The slide driving member includes a first driving part and a second driving part; wherein the method comprises the steps of

The first driving component and the second driving component are respectively fixed at one side of the backboard and respectively close to the upper end and the lower end of the backboard through a corresponding third fixed block and a corresponding fourth fixed block;

two ends of the second sliding rod are fixedly connected with the first driving part and the second driving part respectively;

two sliding blocks fixedly connected with the end part of the connecting rod driving component are movably sleeved on the periphery of the second sliding rod;

the second energy absorption component is fixedly arranged between the two sliding blocks; wherein the method comprises the steps of

The second energy absorption component is a spiral spring sleeved on the periphery of the second sliding rod;

the first driving part and the second driving part are gunpowder drivers.

8. The headrest driving mechanism for a car seat according to claim 5 or 6, wherein the driving assembly is provided on a side of the back plate facing the front portion of the car seat, and the driving assembly further comprises a third slider bar, a third energy absorbing member, and a fourth energy absorbing member; and is also provided with

The slide driving member includes a third driving part; wherein the method comprises the steps of

Two ends of the third sliding rod are fixed on one side of the backboard through a fifth fixed block and a sixth fixed block respectively;

two sliding blocks fixedly connected with the end part of the connecting rod driving component are movably sleeved on the periphery of the third sliding rod;

the third energy absorption component is arranged between the fifth fixed block and one of the sliding blocks;

the fourth energy absorption component is arranged between the sixth fixed block and the other sliding block;

one of the two sliding blocks is closer to the fifth fixed block, and the other sliding block is closer to the sixth fixed block;

the sliding driving member is sleeved and fixed on the periphery of the third sliding rod between the two sliding blocks; and is also provided with

The third energy absorption component and the fourth energy absorption component are spiral springs sleeved on the periphery of the third sliding rod; wherein the method comprises the steps of

Two ends of the third energy absorption component are fixedly connected with the fifth fixed block and one of the sliding blocks respectively;

two ends of the fourth energy absorption component are fixedly connected with the sixth fixed block and the other sliding block respectively; and is also provided with

The slide drive member is a powder driver.

9. The headrest driving mechanism for an automobile seat according to claim 1, wherein the headrest includes a headrest body and an extension rod extending from the headrest body to a lower end of the headrest body; and is also provided with

The periphery of the upper cross beam of the backrest is rotatably provided with a rotating shaft assembly, and the rotating shaft assembly comprises a rotating part and a fixing part; the rotating part is sleeved on the periphery of the upper cross beam, and the fixed part is fixedly connected with the rotating part; wherein the method comprises the steps of

The connecting member is in a rod-shaped structure, one end of the connecting member is rotatably connected with the supporting member, and the other end of the connecting member is fixedly connected with the rotating part;

the extension rod extends out of the tail end of the headrest body and is slidably connected with the fixing part; and is also provided with

The fixing part is of a block structure, and a through hole matched with the extension rod is formed in the fixing part;

the inner wall of the through hole and the outer wall of the extension rod are respectively provided with a clamping protrusion and a groove in a matching way.

10. An automobile seat comprising the headrest driving mechanism of an automobile seat as claimed in any one of claims 1 to 9.