CN221233574U - Seat assembly and vehicle having the same - Google Patents

Abstract

The utility model discloses a seat assembly and a vehicle with the same, wherein the seat assembly comprises: the seat main body comprises a seat basin and a backrest, and the backrest is rotatably connected with the rear end of the seat basin through a rotating shaft; the adjusting mechanism comprises a driving assembly and a pull belt, the driving assembly is arranged on the seat basin, one end of the pull belt is fixed with the backrest, the other end of the pull belt extends to be connected with the driving assembly, and the driving assembly drives the backrest to rotate relative to the seat basin through the pull belt. According to the seat assembly, the driving assembly and the pull belt are arranged, so that the angle of the backrest of the seat can be adjusted, the included angle between the backrest and the seat basin can be quickly reduced when a vehicle collides, a restraint system of the vehicle acts on an occupant, the safety of the occupant can be further protected, and the damage to the occupant is reduced; meanwhile, the force required by adjusting the angle can be reduced, the probability of damage of the adjusting mechanism is reduced, the reliability of the adjusting mechanism is improved, and passengers can be better protected.

Description

Seat assembly and vehicle having the same

Technical Field

The utility model relates to the technical field of vehicles, in particular to a seat assembly and a vehicle with the same.

Background technique

In the related art, in order to improve riding comfort, the rearward tilt angle of the seat back is often greater than the designed 25° during vehicle driving. However, when the seat back angle is greater than 25° (the occupant is in a lying position) and the vehicle collides, the existing traditional airbags, seat belts and other restraint system devices cannot provide good protection for the occupants.

Utility Model Content

The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a seat assembly, which can realize the angle adjustment of the seat back, so that when the vehicle collides, the angle between the backrest and the seat pan can be quickly reduced, so that the restraint system of the vehicle can take effect on the occupants, thereby protecting the safety of the occupants and reducing the injuries suffered by the occupants; at the same time, it can also reduce the force required for adjusting the angle, reduce the probability of damage to the adjustment mechanism, and improve the reliability of the adjustment mechanism, thereby better protecting the occupants.

The utility model also provides a vehicle with the seat assembly.

The seat assembly according to the first aspect of the utility model includes: a seat body, the seat body including a seat basin and a backrest, the backrest being rotatably connected to the rear end of the seat basin via a rotating shaft; an adjustment mechanism, the adjustment mechanism including a drive assembly and a pull belt, the drive assembly being arranged on the seat basin, one end of the pull belt being fixed to the backrest, the other end of the pull belt extending to be connected to the drive assembly, and the drive assembly driving the backrest to rotate relative to the seat basin via the pull belt.

According to the seat assembly of the utility model, the angle of the seat back can be adjusted by providing a drive component and a pull strap, so that when the vehicle collides, the angle between the backrest and the seat pan can be quickly reduced, so that the vehicle's restraint system can take effect on the occupants, thereby protecting the safety of the occupants and reducing the injuries suffered by the occupants; at the same time, the use of pull straps and drive components to adjust the angle of the seat back can also reduce the force required for adjusting the angle, reduce the probability of damage to the adjustment mechanism, and improve the reliability of the adjustment mechanism, thereby better protecting the occupants.

According to some embodiments of the utility model, the driving assembly includes: a piston cylinder and a piston rod, the piston cylinder is arranged on the seat basin, the piston rod is movably arranged in the piston cylinder, and the pull belt is fixedly connected to the piston rod.

According to some embodiments of the utility model, the piston rod divides the internal space of the piston cylinder into a first chamber and a second chamber, and the drive assembly also includes: a gas generator, which is arranged on the piston cylinder, and the gas generator is configured to inflate the first chamber when ignited to push the piston rod to move.

According to some embodiments of the utility model, the adjustment mechanism further includes: a connecting member, one end of which is fixed to the piston rod and the other end of which extends out of the piston cylinder and is connected to the drawstring, and the connecting member is a connecting rod or a connecting rope.

According to some embodiments of the utility model, the other end of the connecting member is formed with an annular connecting end, the inner side of the connecting end defines a connecting hole, and the drawstring is passed through the connecting hole and fixed to the connecting end.

According to some embodiments of the utility model, the adjustment mechanism further includes: a guide member, the guide member is arranged on the seat basin, the guide member is formed with a guide hole, and the other end of the pull belt passes through the guide hole to be connected to the connecting member.

According to some embodiments of the utility model, the adjustment mechanism also includes: a drawstring retractor, the drawstring retractor is arranged on the backrest, the drawstring retractor includes: a reel and a locking structure, the reel is rotatable, the one end of the drawstring is wound around the reel, the drawstring retractor has an adaptive state and a fixed state, in the fixed state, the locking structure locks the reel to limit the rotation of the reel, and in the adaptive state, the locking structure releases the reel, and the reel can reel and unreel the one end of the drawstring.

According to some embodiments of the present utility model, the adjusting mechanism includes a plurality of adjusting mechanisms, and the plurality of adjusting mechanisms are arranged at intervals on the left and right.

According to some embodiments of the present invention, the backrest is rotatable relative to the seat bowl between an initial position and a plurality of rearwardly tilted positions located behind the initial position, and the adjustment mechanism is configured to drive the backrest to rotate toward the initial position.

According to some embodiments of the utility model, it further includes: a collision sensor and a controller, wherein the collision sensor and the adjustment mechanism are both connected to the controller, and when the collision sensor detects that a vehicle collision occurs, the controller sends a start instruction to the adjustment mechanism.

According to some embodiments of the utility model, the seat assembly also includes: a locking mechanism, which is connected to the backrest and/or the rotating shaft for locking the backrest, and the locking mechanism is connected to the controller, and when the collision sensor detects a vehicle collision, the controller controls the locking mechanism to unlock the backrest.

A vehicle according to the second aspect of the utility model comprises the seat assembly according to the first aspect of the utility model.

According to the vehicle of the utility model, the overall performance of the vehicle is improved by providing the seat assembly of the first aspect.

Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a seat assembly according to an embodiment of the present utility model;

FIG2 is a partial schematic diagram of a seat assembly according to an embodiment of the present utility model;

FIG3 is a partial schematic diagram of a seat assembly according to an embodiment of the present utility model from another angle;

FIG4 is a partial schematic diagram of a seat assembly according to another embodiment of the present utility model;

FIG. 5 is a partial schematic diagram of a seat assembly according to an embodiment of the present invention at another angle.

Reference numerals:

100. Seat assembly;

10. Seat body; 11. Backrest; 12. Seat basin;

20. Adjustment mechanism; 21. Drive assembly; 211. Piston cylinder; 212. Piston rod; 213. Gas generator; 22. Drawstring; 23. Connector; 24. Guide; 25. Drawstring retractor;

30. Locking mechanism; 40. Rotating shaft.

Detailed ways

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

A seat assembly 100 according to an embodiment of a first aspect of the present utility model will be described below with reference to FIGS. 1 to 5 .

As shown in Figures 1 and 4, the seat assembly 100 according to the embodiment of the first aspect of the utility model includes: a seat body 10 and an adjustment mechanism 20, the seat body 10 includes a seat basin 12 and a backrest 11, and the backrest 11 is rotatably connected to the rear end of the seat basin 12 through a rotating shaft 40; the adjustment mechanism 20 includes a driving component 21 and a pull belt 22, the driving component 21 is arranged on the seat basin 12, one end of the pull belt 22 is fixed to the backrest 11, and the other end of the pull belt 22 extends to be connected to the driving component 21, and the driving component 21 drives the backrest 11 to rotate relative to the seat basin 12 through the pull belt 22.

Specifically, the seat body 10 is mainly a component for passengers to sit on. Among them, the backrest 11 is rotatable relative to the seat pan 12, and the backrest 11 can be adjusted according to the comfort needs of customers, for example, it can be switched between a sitting position and a lying position, thereby improving the comfort and experience of the passengers.

The adjustment mechanism 20 is used to reduce the angle between the backrest 11 and the seat pan 12. When the vehicle collides, the seat back 11 can be quickly pulled toward the seat pan 12, so that the vehicle's restraint system (such as airbags) can act on the occupants, thereby protecting the safety of the occupants and reducing the injuries suffered by the occupants. Among them, the drive assembly 21 mainly provides a driving force for driving the drawstring 22 to drive the backrest 11 to rotate in the direction of the seat pan 12; the drawstring 22 is used to connect the backrest 11 and the drive assembly 21, and is a component used to realize the drive assembly 21 driving the backrest 11 to rotate relative to the seat pan 12.

When the vehicle collides, the drive component 21 exerts a force on the drawstring 22, tightening the drawstring 22. At the same time, the drawstring 22 generates a pulling force on the backrest 11 toward the seat basin 12, driving the backrest 11 to rotate in the direction of the seat basin 12. At this time, the seat back 11 drives the rotating shaft 40 to rotate forward and downward. The rotating shaft 40 forms the rotation center of the backrest 11. The distance between the connection position between the drawstring 22 and the backrest 11 and the rotating shaft 40 is equivalent to the lever arm, and then the drawstring 22 drives the backrest 11 to rotate, which is equivalent to applying torque to the rotating shaft 40, thereby reducing the force required to adjust the angle. At the same time, the structure of the drawstring 22 and the drive component 21 is relatively simple, and the working process is simple, so the probability of damage to the adjustment mechanism 20 is small and the reliability is high.

When the vehicle collides, the drive assembly 21 can drive the pull strap 22 to tighten toward the seat pan 12, thereby pulling the backrest 11 to rotate toward the seat pan 12. The seat back 11 can be quickly pulled toward the seat pan 12, reducing the angle between the backrest 11 and the seat pan 12, so that the vehicle's restraint system can take effect on the occupants, thereby protecting the occupants' safety and reducing the injuries suffered by the occupants.

According to the seat assembly 100 of the embodiment of the utility model, the angle adjustment of the seat back 11 can be achieved by providing a drive component 21 and a pull strap 22, so that when the vehicle collides, the angle between the backrest 11 and the seat pan 12 can be quickly reduced, so that the vehicle's restraint system can take effect on the occupants, thereby protecting the safety of the occupants and reducing the injuries suffered by the occupants; at the same time, the use of the pull strap 22 and the drive component 21 to achieve the adjustment of the angle of the seat back 11 can also reduce the force required for adjusting the angle, reduce the probability of damage to the adjustment mechanism 20, and improve the reliability of the adjustment mechanism 20, thereby better protecting the occupants.

According to some embodiments of the utility model, as shown in FIG4 , the driving assembly 21 includes: a piston cylinder 211 and a piston rod 212, wherein the piston cylinder 211 is disposed on the seat basin 12, the piston rod 212 is movably disposed in the piston cylinder 211, and the drawstring 22 is fixedly connected to the piston rod 212. The piston rod 212 is fixedly connected to the drawstring, and the piston rod 212 can drive the drawstring 22 to move, thereby driving the seat back 11 to move toward the seat basin 12; the piston cylinder 211 can limit the movement direction of the piston rod 212, and can effectively prevent the piston rod 212 from deviating during movement, thereby ensuring that the seat back 11 is pulled toward the seat basin 12, and the angle of the seat back 11 can be adjusted.

According to some embodiments of the present invention, as shown in FIG4 , the piston rod 212 divides the internal space of the piston cylinder 211 into a first chamber and a second chamber, and the drive assembly 21 further includes: a gas generator 213, which is disposed on the piston cylinder 211 and is configured to inflate the first chamber when ignited to push the piston rod 212 to move. The gas generator 213 releases gas in a short time and has a large energy, thereby quickly pushing the piston rod 212 to move forward, reducing the reaction time of adjusting the angle of the seat back 11, thereby better protecting the occupants.

Furthermore, the piston cylinder 211 is disposed at the lower side of the seat basin 12 and extends forward and backward, the piston rod 212 is movably connected to the piston cylinder 211 along the forward and backward direction, and the drawstring 22 is connected to the piston rod 212 .

For example, as shown in Figure 4, the piston cylinder 211 is formed in a cylindrical shape, and the rear end of the piston cylinder 211 is connected to a circular tube extending upward and backward, and the gas generator 213 is arranged in the circular tube. In this way, the interference between the gas generator 213 and the piston rod 212 can be effectively avoided, thereby ensuring the normal operation of the piston rod 212.

Furthermore, the driving assembly 21 also includes a piston cylinder fixing plate, which is fixedly connected to the piston cylinder 211, and the piston cylinder 211 is fixed to the basin bracket through the fixing plate.

According to some embodiments of the utility model, as shown in FIG4 , the adjustment mechanism 20 further includes: a connecting member 23, one end of the connecting member 23 is fixed to the piston rod 212 and the other end extends out of the piston cylinder 211 and is connected to the drawstring 22. The connecting member 23 may be a connecting rod or a connecting rope. The drawstring 22 is connected to the piston rod 212 through the connecting member 23, which can increase the convenience of connecting the drawstring 22 and the piston rod 212.

According to some embodiments of the present invention, as shown in FIG4 , the other end of the connecting member 23 is formed with an annular connecting end, the inner side of the connecting end defines a connecting hole, and the drawstring 22 is inserted into the connecting hole and fixed to the connecting end. In this way, the drawstring 22 can be fixedly connected to the connecting member 23, and the connection convenience of the drawstring 22 can be increased.

According to some embodiments of the present invention, the adjustment mechanism 20 further includes: a guide member 24, the guide member 24 is provided on the seat basin 12, the guide member 24 is formed with a guide hole, and the other end of the pull belt 22 passes through the guide hole and is connected to the connecting member 23. The guide member 24 can guide the pull belt 22 and limit the movement direction of the pull belt 22, thereby ensuring that the seat back 11 is pulled toward the seat basin 12, so as to adjust the angle of the seat back 11.

According to some embodiments of the utility model, as shown in Figure 5, the adjustment mechanism 20 also includes: a drawstring retractor 25, the drawstring retractor 25 is arranged on the backrest 11, the drawstring retractor 25 includes: a reel and a locking structure, the reel is rotatable, one end of the drawstring 22 is wound around the reel, the drawstring retractor 25 has an adaptive state and a fixed state, in the fixed state, the locking structure locks the reel to limit the rotation of the reel, in the adaptive state, the locking structure releases the reel, and the reel can reel and unreel one end of the drawstring 22. Among them, when the backrest 11 is adjusted backward, the locking structure releases the reel, and the reel unwinds the drawstring 22, so that the backrest 11 can be adjusted backward without obstacle, thereby improving the comfort of the occupant; when the backrest 11 is adjusted forward, the reel reels up the drawstring 22 according to the moving position of the seat, so that the excess drawstring 22 is stored on the reel, thereby ensuring the neatness of the appearance of the seat assembly 100; when the seat remains in the use position, the locking structure locks the reel to limit the rotation of the reel, and then limits the retraction and release of the drawstring 22, thereby ensuring that the drawstring 22 is not released when the piston rod 212 drives the drawstring 22 to move, thereby ensuring the normal use of the adjustment mechanism 20.

According to some embodiments of the utility model, the adjustment mechanism 20 includes a plurality of adjustment mechanisms 20, and the plurality of adjustment mechanisms 20 are arranged at intervals on the left and right. For example, the number of the adjustment mechanisms 20 can be two, three or more. Among them, the plurality of adjustment mechanisms 20 is conducive to quickly adjusting the backrest angle of the seat, improving the response speed, and enabling the backrest 11 of the seat to be quickly adjusted to a normal sitting position in the event of a collision, so that the restraint system can take effect, thereby better protecting the occupants.

According to some embodiments of the present invention, the backrest 11 is rotatable relative to the seat pan 12 between an initial position and a plurality of rearwardly inclined positions (e.g., half-lying, fully lying) located behind the initial position, and the adjustment mechanism 20 is configured to drive the backrest 11 to rotate toward the initial position.

Specifically, when the backrest 11 is in the initial position relative to the seat basin 12, the occupant is in a normal sitting position. In the event of a head-on collision or a side collision, restraint systems such as seat belts, airbags, and air curtains can play a protective role. In the event of a rear-end collision, the seat back 11 and the headrest can fully play a protective role.

Among them, the backrest 11 is rotatable relative to the seat pan 12 between an initial position and a plurality of rearward tilting positions located behind the initial position, so that the seat backrest 11 can be adjusted according to the comfort needs of the occupants, thereby increasing the comfort of the seat; the adjustment mechanism 20 is configured to drive the backrest 11 to rotate toward the initial position, so that the seat backrest 11 can be adjusted to a position where the restraint system can play a protective role when the vehicle collides, thereby better protecting the occupants and reducing the injuries suffered by the occupants in the collision.

According to some embodiments of the present invention, the seat assembly 100 further includes: a collision sensor and a controller, wherein the collision sensor and the adjustment mechanism 20 are both connected to the controller, and when the collision sensor detects a collision, the controller activates the adjustment mechanism 20. The controller is communicatively connected with the collision sensor and the adjustment mechanism 20, so that the adjustment mechanism 20 can be activated according to the collision information, thereby automatically adjusting the angle of the seat back 11 to ensure the safety of passengers in abnormal sitting positions.

Specifically, the collision sensor can be used to detect and transmit the collision signal of the vehicle; the controller can be used to receive and process the collision signal detected by the collision sensor and send a working instruction to the adjustment mechanism 20; the adjustment mechanism 20 can receive the instruction sent by the controller and start the adjustment work.

When the vehicle collides, the collision sensor detects the collision signal and transmits it to the controller. The controller receives the signal and analyzes and determines whether the car is hit. When the collision signal transmitted to the controller reaches the preset condition set by the controller, the controller sends a command to the adjustment mechanism 20 to ignite the gas generator 213. The gas pushes the piston rod 212 to quickly tighten the drawstring 22, thereby quickly adjusting the angle of the seat back 11.

Furthermore, the seat assembly 100 also includes a radar detector, wherein the radar detector is more sensitive than the collision sensor, and can identify possible collisions in advance, thereby being able to take protective actions earlier, further shortening the response time for adjusting the seat back 11, and further improving the protection performance for the occupants.

According to some embodiments of the utility model, the seat assembly 100 further includes: a locking mechanism 30, the locking mechanism 30 is connected to the backrest 11 and/or the rotating shaft 40 for locking the backrest 11, and the locking mechanism 30 is connected to the controller. When the collision sensor detects that the vehicle has collided, the controller controls the locking mechanism 30 to unlock the backrest 11. The locking mechanism 30 can be used to lock the backrest 11, so that the seat backrest 11 and its components remain in the use position, thereby ensuring the safety of the seat; at the same time, the locking mechanism 30 is connected to the controller. When the vehicle collides, the controller can control the locking mechanism to unlock the backrest 11, so that the backrest 11 can rotate relative to the seat pan 12, thereby realizing the angle adjustment of the seat backrest 11, so that the seat backrest 11 can be restored to the normal sitting position, so that the restraint system can protect the occupant and improve the safety of the occupant.

Specifically, the locking mechanism 30 may be connected to the backrest 11 for locking the backrest 11 , may be connected to the rotating shaft 40 for locking the backrest 11 , or may be connected to both the backrest 11 and the rotating shaft 40 for locking the backrest 11 .

When the vehicle collides, the collision sensor detects the collision signal and transmits it to the controller. The controller receives the signal and analyzes and determines whether the car is hit. When the collision signal transmitted to the controller reaches the preset condition set by the controller, the controller simultaneously sends instructions to the adjustment mechanism 20 and the locking mechanism 30 to unlock the locking mechanism 30 and detonate the gas generator 213. The gas quickly pushes the piston rod 212 to tighten the drawstring 22, so that the angle of the seat back 11 can be quickly adjusted. When the seat back 11 reaches the preset position, the locking mechanism 30 locks the backrest 11 to stop the backrest 11 from rotating.

Furthermore, when the collision sensor detects a vehicle collision, the locking structure of the drawstring retractor 25 is switched to a fixed state, thereby ensuring that the drawstring 22 is not released when the piston rod 212 drives the drawstring 22 to move, thereby ensuring the pulling force of the drawstring 22 on the seat back 11, thereby achieving adjustment of the angle of the seat back 11.

Furthermore, the seat assembly 100 also includes a rotation spring, which is arranged on the rotating shaft 40 and can control the rotation stiffness of the rotating shaft 40, thereby buffering the movement of the seat back 11, thereby improving the passenger's experience and comfort during the process of adjusting the angle of the seat back 11.

The vehicle according to the embodiment of the second aspect of the utility model comprises the seat assembly 100 according to the embodiment of the first aspect of the utility model.

The vehicle according to the embodiment of the utility model is provided with the seat assembly 100 of the first embodiment, thereby improving the overall performance of the vehicle.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (11)

1. A seat assembly, comprising:

The seat main body comprises a seat basin and a backrest, and the backrest is rotatably connected with the rear end of the seat basin through a rotating shaft;

The adjusting mechanism comprises a driving component and a drawstring, the driving component is arranged on the seat basin, one end of the drawstring is fixed with the backrest, the other end of the drawstring extends to be connected with the driving assembly, and the driving assembly drives the backrest to rotate relative to the seat basin through the drawstring.

2. The seat assembly of claim 1 wherein the drive assembly comprises: the piston cylinder is arranged on the seat basin, the piston rod is movably arranged in the piston cylinder, and the pull belt is fixedly connected with the piston rod.

3. The seat assembly of claim 2 wherein the piston rod divides the interior space of the piston tube into a first chamber and a second chamber, the drive assembly further comprising: a gas generator disposed on the piston barrel, the gas generator configured to inflate the first chamber upon a squib to urge the piston rod to move.

4. The seat assembly of claim 2 wherein the adjustment mechanism further comprises: the connecting piece, the one end of connecting piece with the piston rod is fixed and the other end stretches out the piston cylinder with the stretching strap links to each other, the connecting piece is connecting rod or connecting rope.

5. The seat assembly of claim 4 wherein said other end of said connector defines an annular connecting end, an inner side of said connecting end defining a connecting aperture, said pull strap being disposed through said connecting aperture and secured to said connecting end.

6. The seat assembly of claim 4 wherein the adjustment mechanism further comprises: the guide piece is arranged on the seat basin, a guide hole is formed in the guide piece, and the other end of the drawstring penetrates through the guide hole and is connected with the connecting piece.

7. The seat assembly of claim 1 wherein the adjustment mechanism further comprises: the draw tape winding and unwinding device is arranged on the backrest, and the draw tape winding and unwinding device comprises: the spool is rotatable, one end of the drawstring is wound on the spool, the drawstring winding and unwinding device is provided with a self-adapting state and a fixed state, the locking structure locks the spool in the fixed state so as to limit the rotation of the spool, the locking structure releases the spool in the self-adapting state, and the spool can wind and unwind one end of the drawstring.

8. The seat assembly of any one of claims 1-7 wherein said adjustment mechanism includes a plurality of said adjustment mechanisms spaced laterally.

9. The seat assembly of any one of claims 1-7 further comprising: the collision sensor and the adjusting mechanism are connected with the controller, and when the collision sensor detects that a vehicle collides, the controller sends a starting instruction to the adjusting mechanism.

10. The seat assembly of claim 9 further comprising: the locking mechanism is connected with the backrest and/or the rotating shaft and used for locking the backrest, the locking mechanism is connected with the controller, and when the collision sensor detects that a vehicle collides, the controller controls the locking mechanism to unlock the backrest.

11. A vehicle comprising a seat assembly according to any one of claims 1 to 10.