CN221233574U - Seat assembly and vehicle with 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 with 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

In the related art, in order to improve riding comfort, the back tilt angle of the seat back is often greater than 25 ° designed during the running process of the vehicle, however, when the angle of the seat back is greater than 25 ° (the occupant is in a lying position), and the vehicle collides, the existing restraint system devices such as the conventional airbag, the safety belt and the like cannot generate a better protection effect on the occupant.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the seat assembly, which can realize the angle adjustment of the backrest of the seat, so that the included angle between the backrest and the seat basin can be quickly reduced when a vehicle collides, a restraint system of the vehicle can act 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.

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

A seat assembly according to a first aspect of the utility model 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 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.

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 can act on an occupant, the safety of the occupant can be further protected, and the damage to the occupant is reduced; meanwhile, the angle of the seat back is adjusted by using the pull belt and the driving assembly, 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.

According to some embodiments of the utility model, 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.

According to some embodiments of the utility model, the piston rod divides the interior space of the piston cylinder 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.

According to some embodiments of the utility model, 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.

According to some embodiments of the utility model, the other end of the connecting piece is formed with an annular connecting end, a connecting hole is defined on the inner side of the connecting end, and the pull belt is arranged in the connecting hole in a penetrating mode and is fixed with the connecting end.

According to some embodiments of the utility model, 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.

According to some embodiments of the utility model, 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.

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

According to some embodiments of the utility model, the backrest is rotatable relative to the basin between an initial position and a plurality of reclined positions rearward of the initial position, the adjustment mechanism being configured to drive the backrest in rotation toward the initial position.

According to some embodiments of the utility model, 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.

According to some embodiments of the utility model, the seat assembly further comprises: 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.

A vehicle according to a second aspect of the utility model comprises a 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 utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

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

FIG. 2 is a partial schematic view of a seat assembly according to an embodiment of the present utility model;

FIG. 3 is a partial schematic view of another angle of a seat assembly according to an embodiment of the present utility model;

FIG. 4 is a partial schematic view of yet another angle of a seat assembly according to an embodiment of the present utility model;

FIG. 5 is a partial schematic view of yet another angle of a seat assembly according to an embodiment of the utility model.

Reference numerals:

100. A seat assembly;

10. A seat main body; 11. a backrest; 12. a seat basin;

20. An adjusting mechanism; 21. a drive assembly; 211. a piston cylinder; 212. a piston rod; 213. a gas generator; 22. pulling a belt; 23. a connecting piece; 24. a guide member; 25. a drawstring retractor;

30. a locking mechanism; 40. a rotating shaft.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A seat assembly 100 in accordance with an embodiment of the first aspect of the utility model is described below with reference to fig. 1-5.

As shown in fig. 1 and 4, a seat assembly 100 according to an embodiment of the first aspect of the present utility model includes: the seat comprises a seat body 10 and an adjusting mechanism 20, wherein the seat body 10 comprises a seat basin 12 and a backrest 11, and the backrest 11 is rotatably connected with the rear end of the seat basin 12 through a rotating shaft 40; the adjusting mechanism 20 comprises a driving component 21 and a pull belt 22, wherein the driving component 21 is arranged on the seat basin 12, one end of the pull belt 22 is fixed with the backrest 11, the other end of the pull belt 22 extends to be connected with 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 main body 10 is mainly a member for seating an occupant. The backrest 11 is rotatable relative to the seat pan 12, and the backrest 11 can be adjusted according to comfort requirements of clients, for example, the sitting posture and the lying posture can be switched, and comfort and experience of passengers can be improved.

The adjusting mechanism 20 is used for reducing the angle between the backrest 11 and the seat pan 12, and can quickly pull the backrest 11 towards the seat pan 12 when the vehicle collides, so that a restraint system (such as an airbag) of the vehicle can act on the passenger, thereby protecting the safety of the passenger and reducing the damage to the passenger. The driving component 21 mainly provides driving force for driving the pull belt 22 to drive the backrest 11 to rotate towards the seat basin 12; the pull belt 22 is used for connecting the backrest 11 and the driving assembly 21, and is a component for realizing the rotation of the backrest 11 relative to the seat pan 12 driven by the driving assembly 21.

When a vehicle collides, the driving assembly 21 generates acting force on the pull belt 22 to tighten the pull belt 22, meanwhile, the pull belt 22 generates pulling force towards the direction of the seat basin 12 on the backrest 11, the backrest 11 is driven to rotate towards the direction of the seat basin 12, at this time, the seat backrest 11 drives the rotating shaft 40 to rotate forwards and downwards, the rotating shaft 40 is formed into the rotating center of the backrest 11, the distance between the connecting position of the pull belt 22 and the backrest 11 and the rotating shaft 40 is equivalent to a force arm, the pull belt 22 drives the backrest 11 to rotate and is equivalent to applying torque to the rotating shaft 40, and further, the force required by adjusting the angle can be reduced.

When the vehicle collides, the driving assembly 21 can drive the pull belt 22 to tighten towards the seat basin 12, so that the backrest 11 is pulled to rotate towards the seat basin 12, the backrest 11 can be pulled towards the seat basin 12 rapidly, the included angle between the backrest 11 and the seat basin 12 is reduced, a restraint system of the vehicle can act on an occupant, the safety of the occupant can be further protected, and the damage to the occupant is reduced.

According to the seat assembly 100 provided by the embodiment of the utility model, the driving assembly 21 and the pull belt 22 are arranged, so that the angle of the seat back 11 can be adjusted, the included angle between the seat back 11 and the seat basin 12 can be quickly reduced when a vehicle collides, a restraint system of the vehicle can act on an occupant, the safety of the occupant can be further protected, and the damage to the occupant is reduced; meanwhile, the angle of the seat back 11 is adjusted by the pull belt 22 and the driving assembly 21, so that the force required for adjusting the angle can be reduced, the probability of damage to the adjusting mechanism 20 is reduced, the reliability of the adjusting mechanism 20 is improved, and passengers are better protected.

According to some embodiments of the utility model, as shown in fig. 4, the driving assembly 21 includes: the piston cylinder 211 and the piston rod 212, the piston cylinder 211 is arranged on the seat basin 12, the piston rod 212 is movably arranged in the piston cylinder 211, and the pull belt 22 is fixedly connected with the piston rod 212. The piston rod 212 is fixedly connected with the pull belt, and the piston rod 212 can drive the pull belt 22 to move so as to drive the seat back 11 to move towards the seat basin 12; the piston cylinder 211 can limit the movement direction of the piston rod 212, so that the piston rod 212 can be effectively prevented from being deviated during movement, the seat back 11 can be further ensured to be pulled to the seat basin 12, and the adjustment of the angle of the seat back 11 is realized.

According to some embodiments of the present utility model, as shown in fig. 4, the piston rod 212 divides the inner space of the piston cylinder 211 into a first chamber and a second chamber, and the driving assembly 21 further includes: a gas generator 213, the gas generator 213 being provided on the piston cylinder 211, the gas generator 213 being configured to inflate into the first chamber upon ignition to push the piston rod 212 to move. The gas generator 213 has short gas releasing time and high energy, so that the piston rod 212 can be quickly pushed to move forward, the reaction time for adjusting the angle of the seat back 11 is reduced, and the passengers can be better protected.

Further, a piston cylinder 211 is provided at the lower side of the bowl 12 and extends in the front-rear direction, a piston rod 212 is connected to the piston cylinder 211 movably in the front-rear direction, and a pull strap 22 is connected to the piston rod 212.

For example, as shown in fig. 4, the piston cylinder 211 is formed in a cylindrical shape, a circular tube extending upwards and backwards is connected to the rear end of the piston cylinder 211, and the gas generator 213 is arranged in the circular tube, so that interference between the gas generator 213 and the piston rod 212 can be effectively avoided, and normal operation of the piston rod 212 can be ensured.

Further, the driving assembly 21 further comprises a piston cylinder fixing plate, the fixing plate is fixedly connected with the piston cylinder 211, and the piston cylinder 211 is fixed on the seat support through the fixing plate.

According to some embodiments of the utility model, as shown in fig. 4, the adjustment mechanism 20 further includes: and a connecting member 23, wherein 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 to be connected to the pull tape 22. The connecting piece 23 may be a connecting rod or a connecting rope. The pull strap 22 is connected to the piston rod 212 through the connection member 23, so that the convenience of connection of the pull strap 22 to the piston rod 212 can be increased.

According to some embodiments of the present utility model, as shown in fig. 4, the other end of the connecting member 23 is formed with a ring-shaped connecting end, the inner side of the connecting end defines a connecting hole, and the pull strap 22 is inserted into the connecting hole to be fixed with the connecting end. Thus, the pull strap 22 and the connecting piece 23 can be conveniently and fixedly connected, and the convenience of connecting the pull strap 22 is increased.

According to some embodiments of the utility model, the adjustment mechanism 20 further comprises: the guide piece 24, the guide piece 24 is located in the seat basin 12, and the guide piece 24 is formed with the guiding hole, and the other end of draw tape 22 passes the guiding hole and links to each other with connecting piece 23. The guide piece 24 can guide the pull belt 22, limit the movement direction of the pull belt 22, and further ensure that the seat back 11 is pulled towards the seat pan 12, so as to realize the adjustment of the angle of the seat back 11.

According to some embodiments of the utility model, as shown in fig. 5, the adjustment mechanism 20 further includes: the draw-tape retractor 25, the draw-tape retractor 25 is provided on the backrest 11, and the draw-tape retractor 25 includes: the spool and the locking structure, the spool is rotatable, one end of the pull-strap 22 is wound on the spool, the pull-strap reel 25 has an adaptive state and a fixed state, in the fixed state, the locking structure locks the spool to restrict rotation of the spool, in the adaptive state, the locking structure releases the spool, and the spool can reel and unreel one end of the pull-strap 22. When the backrest 11 is adjusted backwards, the locking structure releases the reel, and the reel unwinds the pull belt 22, so that the backrest 11 can be adjusted backwards in an unobstructed manner, and the comfort of passengers is improved; when the backrest 11 is adjusted forward, the reel winds the pull belt 22 according to the moving position of the seat, so that the redundant pull belt 22 is stored on the reel, thus ensuring the neat appearance of the seat assembly 100; when the seat is kept at the use position, the locking structure locks the reel to limit the rotation of the reel, so as to limit the retraction of the pull belt 22, and further ensure that the pull belt 22 is not released when the piston rod 212 drives the pull belt 22 to move, and ensure the normal use of the adjusting mechanism 20.

According to some embodiments of the present utility model, the adjustment mechanism 20 includes a plurality of adjustment mechanisms 20 arranged in a left-to-right spaced relationship. For example, the number of the adjusting mechanisms 20 may be two, three, or more. Wherein, a plurality of adjustment mechanism 20 are favorable to the back angle of quick adjustment seat, improve response speed, make the back 11 of seat adjust to the position of normal position of sitting fast when bumping, and restraint system can take effect, and then can protect the passenger better.

According to some embodiments of the utility model, the backrest 11 is rotatable relative to the basin 12 between an initial position and a plurality of reclined positions (e.g., semi-reclined, fully reclined) rearward of the initial position, with the adjustment mechanism 20 configured to drive the backrest 11 toward the initial position.

Specifically, when the backrest 11 is in the initial position with respect to the seat pan 12, the occupant is in a normal sitting posture, and when a frontal collision or side collision occurs, the restraint system such as the seat belt, the airbag, the air curtain, or the like can exert a protective effect, and when a rear collision occurs, the seat backrest 11 and the headrest can fully exert a protective effect.

Wherein, the backrest 11 can rotate between an initial position and a plurality of backward leaning positions positioned at the back side of the initial position relative to the seat pan 12, so that the backrest 11 can be adjusted according to the comfort requirement of passengers, and the comfort of the seat can be further increased; the adjustment mechanism 20 is configured to drive the backrest 11 to rotate toward the initial position, and can adjust the seat backrest 11 to a position at which the restraint system can exert a protective effect in the event of a collision of the vehicle, so that the occupant can be better protected, and injury to the occupant in the event of a collision can be reduced.

According to some embodiments of the utility model, the seat assembly 100 further comprises: the collision sensor and the controller are connected with the controller, and when the collision sensor detects collision, the controller starts the adjusting mechanism 20. Wherein, the controller is connected with the collision sensor and the adjusting mechanism 20 in a communication way, so that the adjusting mechanism 20 can be started according to collision information, and further the angle of the seat back 11 can be automatically adjusted, and the safety of the passengers in an out-of-position sitting posture is ensured.

In particular, the crash sensor may be used to detect and transmit a crash signal of the vehicle; the controller may be configured to receive and process the crash signals detected by the crash sensors and issue a work order to the adjustment mechanism 20; the adjustment mechanism 20 may receive commands from the controller and initiate adjustment operations.

When the vehicle collides, the collision sensor detects a collision signal and transmits the collision signal to the controller, the controller receives the signal and analyzes and judges whether the vehicle is impacted, when the collision signal transmitted to the controller reaches the preset condition set by the controller, the controller sends an instruction to the adjusting mechanism 20 to make the gas generator 213 explode, and the gas pushes the piston rod 212 to rapidly tighten the pull belt 22, so that the angle of the seat back 11 can be rapidly adjusted.

Further, the seat assembly 100 further includes a radar detector, wherein the radar detector is more sensitive to the collision sensor, and can identify a possible collision in advance, so that a protection behavior can be generated earlier, the response time of adjusting the seat back 11 is further shortened, and the protection performance to the occupant is further improved.

According to some embodiments of the utility model, the seat assembly 100 further comprises: the locking mechanism 30 is connected with the backrest 11 and/or the rotating shaft 40 and used for locking the backrest 11, the locking mechanism 30 is connected with the controller, and when the collision sensor detects that a vehicle collides, the controller controls the locking mechanism 30 to unlock the backrest 11. The locking mechanism 30 can be used for locking the backrest 11, so that the backrest 11 and the components are kept at the use position, and the use safety of the seat can be further ensured; simultaneously, locking mechanism 30 links to each other with the controller, and when the vehicle bumps, the controller can control locking mechanism unblock back 11, makes back 11 can rotate relative seat basin 12, and then can realize the angular adjustment of seat back 11, makes seat back 11 can resume the position of normal position of sitting to can make restraint system protect the passenger, improve passenger's security.

Specifically, the locking mechanism 30 may be connected to the backrest 11 to lock the backrest 11, may be connected to the rotation shaft 40 to lock the backrest 11, and may be connected to both the backrest 11 and the rotation shaft 40 to lock the backrest 11.

When the vehicle collides, the collision sensor detects a collision signal and transmits the collision signal to the controller, the controller receives the signal and analyzes and judges whether the vehicle is impacted, when the collision signal transmitted to the controller reaches the preset condition set by the controller, the controller simultaneously sends an instruction to the adjusting mechanism 20 and the locking mechanism 30, so that the locking mechanism 30 is unlocked, the gas generator 213 is subjected to ignition, the gas rapidly pushes the piston rod 212 to tighten the pull belt 22, the angle of the seat back 11 can be rapidly adjusted, and after the seat back 11 reaches the preset position, the locking mechanism 30 locks the seat back 11, and the seat back 11 stops rotating.

Further, when the collision sensor detects that the vehicle collides, the locking structure of the pull belt retractor 25 is switched to a fixed state, so that the pull belt 22 is not released when the piston rod 212 drives the pull belt 22 to move, and further, the pull force of the pull belt 22 on the seat back 11 can be ensured, and the adjustment of the angle of the seat back 11 is realized.

Further, the seat assembly 100 further includes a rotation spring disposed on the rotation shaft 40, so as to control the rotation stiffness of the rotation shaft 40, and further cushion the movement of the seat back 11, thereby improving the experience and comfort of the occupant in adjusting the angle of the seat back 11.

A vehicle according to an embodiment of the second aspect of the present utility model includes a seat assembly 100 according to an embodiment of the first aspect of the present utility model.

According to the vehicle of the embodiment of the present utility model, by providing the seat assembly 100 of the embodiment of the first aspect described above, the overall performance of the vehicle is improved.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which 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.