CN115742896A

CN115742896A - Backrest, seat and vehicle

Info

Publication number: CN115742896A
Application number: CN202211348116.5A
Authority: CN
Inventors: 张志伟; 陈秋锋; 郭传峰; 刘臻青; 徐爽
Original assignee: Shanghai Jidu Automobile Co Ltd
Current assignee: Shanghai Jidu Automobile Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-03-07

Abstract

The embodiment of the application provides a back, seat and vehicle, wherein, the back includes: a backrest body; a housing provided at a front side of the backrest main body and disposed close to a headrest of the seat, the housing being a hard member, the headrest being disposed above the backrest main body; and a connecting structure provided between the backrest main body and the housing; when the shell is subjected to external force, the shell can drive the connecting structure to generate elastic deformation, so that the shell moves back and forth along with the connecting structure. The technical scheme that this application embodiment provided, connection structure can cushion the absorption with the impact for the impact that transmits passenger back weakens greatly, thereby reduces the injury to passenger. Meanwhile, when the seat is normally used, the connecting structure capable of generating elastic deformation is arranged on the rear side of the shell, so that the back of a passenger can be well supported, and the elastic deformation can be generated to improve the overall comfort when the passenger leans against or shakes hard.

Description

Backrest, seat and vehicle

Technical Field

The application relates to the technical field of seats, in particular to a backrest, a seat and a vehicle.

Background

With the development of automobile electromotion and intelligence, automobile interior decoration also increasingly requires the design of novel technology, or provides more functions. In one possible design, adding a shell to the neck of the seat back, but adding a neck shell presents the following problems: on the one hand, comfort problems can be caused; on the other hand, the penetration of the backrest of the dummy can be influenced during the seat whiplash test, thereby increasing the neck injury value of the dummy.

Disclosure of Invention

In view of the above, embodiments of the present application are proposed in order to provide a backrest, a seat and a vehicle that solve the above problems or at least partially solve the above problems.

The embodiment of the application provides a back, is applied to the seat of vehicle, includes:

a backrest body;

the shell is arranged on the front side of the backrest main body and is close to a headrest of the seat, the shell is a hard piece, and the headrest is arranged above the backrest main body; and the number of the first and second groups,

a connecting structure provided between the backrest main body and the housing;

when the shell is subjected to external force, the shell can drive the connecting structure to generate elastic deformation, so that the shell moves back and forth along with the connecting structure.

Optionally, the connecting structure comprises a support member, the support member is located at the front side of the backrest main body and fixed with the backrest main body;

the shell is mounted on the support, and the shell is positioned on the front side of the support;

the support is provided with a first area which is a through hole or a groove;

when the shell is subjected to external force, the support piece can be driven to elastically deform by taking the first area as a starting point.

Optionally, the support comprises a first portion and a second portion which are distributed from bottom to top and connected, and the first region is arranged at the connection position of the first portion and the second portion;

the housing is mounted to the first portion and the housing does not overlap the second portion.

Optionally, the first portion is fixed with the backrest body and the second portion is located above the backrest body.

Optionally, the top end of the first portion is flush with the top end of the backrest body, or the top end of the first portion is lower than and close to the top end of the backrest body.

Optionally, the left and right edges of the supporting member are respectively provided with the first areas in a notch shape.

Optionally, the connecting structure further comprises an elastic member disposed between the support member and the backrest body;

when the shell is subjected to external force, the shell can drive the elastic piece to generate elastic deformation.

Optionally, the elastic member comprises a first section and a second section, the second section is arranged at the upper end of the first section and protrudes out of the rear side of the first section; the first section is abutted against the front side surface of the backrest main body, and the second section is lapped on the upper surface of the backrest main body.

Optionally, the elastic member and the support member are clamped.

Optionally, the elastic member is provided with an energy absorbing groove.

Optionally, the connecting structure further includes a surface cover, the surface cover is of a soft structure, the surface cover covers the outer side of the backrest main body, the shell is located on the front side surface of the surface cover, and the shell is fixed to the surface cover.

Embodiments of the present application also provide a seat, the seat includes a backrest, the backrest includes:

a backrest main body;

a connecting structure provided between the backrest main body and the housing;

The embodiment of the application also provides a vehicle, and the vehicle comprises a seat.

Because the leading flank of back has set up harder casing, when the back received external force striking, harder casing can not cushion the impact, so transmit the impact of passenger back great, cause great injury easily. And the technical scheme that provides in the embodiment of this application has set up connection structure between back main part and casing, when the casing received external force, can drive connection structure and produce elastic deformation to make the casing along with connection structure seesaw, connection structure can cushion external force promptly, makes the impact that transmits passenger back weaken greatly, thereby reduces the injury to the passenger. Meanwhile, when the seat is normally used, the connecting structure capable of generating elastic deformation is arranged on the rear side of the shell, so that the back of a passenger can be well supported, and the elastic deformation can be generated when the passenger leans against or shakes with force to improve the overall comfort. Moreover, the impact on the penetration of the backrest of the dummy can be avoided in the process of the seat whip test, and the injury value of the neck of the dummy is reduced.

Drawings

Fig. 1 is a schematic structural view of a backrest in an embodiment of the present application;

FIG. 2 is a schematic view of the inner structure of the backrest of FIG. 1;

FIG. 3 is an exploded view of the backrest of FIG. 2;

FIG. 4 is a schematic plan view of the backrest of FIG. 2;

FIG. 5 isbase:Sub>A cross-sectional view of the backrest of FIG. 4 taken along line A-A;

fig. 6 is a partial schematic view of the backrest of fig. 5.

Reference numerals:

reference numerals	Name (R)	Reference numerals	Name (R)	Reference numerals	Name (R)
						100	Back support	40	Connection structure	42	Elastic piece
10	Backrest main body	41	Support piece	421	Energy absorption groove
						11	Skeleton	411	The first part	422	Mounting hole
111	First surface	412	The second part	423	First stage
						12	Frame structure	413	First region	424	Second section
20	Head rest	414	Tree-shaped buckle	50	Face sleeve
						30	Shell body

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

It should be noted that, in the description of the present application, if the terms "first", "second", etc. appear, the terms "first", "second", etc. are only used for convenience in describing different components or names, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" is presented throughout, it is meant to include three juxtapositions, exemplified by "A and/or B," including either scheme A, or scheme B, or schemes in which both A and B are satisfied.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Due to some appearance or other functional design requirements, in one possible embodiment, a shell may be added on the seat back corresponding to the neck position of the occupant, and the shell position may be used for adding seat lights, signs and other decorative or functional products. However, when a neck shell is added to the seat, there may be the following problems: on the one hand, comfort problems can be caused; on the other hand, the penetration of the backrest of the dummy can be influenced during the seat whiplash test, thereby increasing the neck injury value of the dummy.

To above-mentioned problem, this application embodiment provides a back, seat and vehicle, can effectively guarantee the travelling comfort of seat, avoids the increase to the neck injury value of dummy simultaneously. It should be noted that the backrest and the seat in the embodiment of the present application may be used as a seat in a vehicle, and of course, may also be used in a general seat, such as an office seat.

Referring to fig. 1 and fig. 2 in combination, an embodiment of the present application provides a backrest 100, including: a backrest main body 10, the backrest main body 10 extending substantially in an up-down direction for supporting a back of a passenger, a lower end of the backrest main body 10 being rotatably connected with a seat cushion of a seat to enable adjustment of an inclination angle of the backrest main body 10. A headrest 20 is provided above the backrest body 10, and the headrest 20 supports the head of the occupant. The headrest 20 is generally of a soft structure, and can be deformed to a certain extent, and the headrest 20 can be restored to its shape after the external force disappears.

Further, the backrest 100 further includes a housing 30, the housing 30 is disposed at the front side of the backrest main body 10 and is disposed close to the headrest 20, that is, the housing 30 is disposed at a position close to the top surface of the backrest main body 10, and the housing 30 is a hard member. The housing 30 serves as an appearance member, and can achieve the effects of beauty and modern science and technology. Optionally, the housing 30 is a plastic piece, such as polyethylene, polypropylene, or the like. In the embodiment of the present application, the case 30 is a hard member, which means that the case 30 cannot be elastically deformed or can be elastically deformed only to a very small extent when an external force is applied to the case, and the case 30 itself does not have an ability to restore the elastic deformation or has only a very small ability to restore the elastic deformation, as compared to an elastic member.

The housing 30 has a substantially plate-shaped structure, such as a semicircular plate shape, a square plate shape, etc., and illustratively, the housing 30 has a semicircular or semi-elliptical plate shape, which includes a straight side and an arc side, wherein two ends of the straight side and two ends of the arc side are connected in a one-to-one correspondence, and the straight side is substantially flush with the top surface of the backrest body 10 or slightly lower than the top surface of the backrest body 10; the arc side is sunken downwards to form a smooth arc structure.

Further, the backrest 100 further includes a connection structure 40, the connection structure 40 is disposed between the backrest main body 10 and the shell 30, the shell 30 is mounted on the connection structure 40, and the connection structure 40 can be deformed when receiving an external force and can recover the deformation when the external force disappears. The connection structure 40 is an elastic structure, and can be elastically deformed when an external force is applied. The elastic structure may be an elastic member having a relatively low hardness due to its elastic properties determined by its own material, such as sponge, rubber, etc. Alternatively, the resilient structure may be resilient due to suitable machining, such as grooving or drilling, and may be inherently relatively stiff, such as a sheet metal or plastic sheet.

Because the front side of the backrest 100 is provided with the harder shell 30, when the backrest 100 is impacted by external force, the harder shell 30 cannot buffer the impact force, so that the impact force transmitted to the back of the passenger is larger, and the passenger is easy to cause larger injury. In the embodiment of the present invention, the connecting structure 40 is disposed between the backrest main body 10 and the shell 30, and when the shell 30 is subjected to an external force, the connecting structure 40 can be driven to generate elastic deformation, so that the shell 30 moves back and forth along with the connecting structure 40, that is, the connecting structure 40 can buffer the external force, so that the impact force transmitted to the back of the passenger is greatly reduced, and the injury to the passenger is reduced. Meanwhile, when the seat is used normally, the connecting structure 40 capable of generating elastic deformation is arranged at the rear side of the shell 30, so that the back of a passenger can be well supported, and the elastic deformation can be generated when the passenger leans against or shakes hard to improve the overall comfort. Moreover, the impact on the penetration of the dummy back 100 during the chair whipping test can be avoided, and the neck injury value of the dummy is reduced.

The embodiments of the present application are described in further detail below with reference to specific embodiments.

In some embodiments, the outer surface of the backrest main body 10 is further covered with a surface cover 50, the surface cover 50 is generally made of a soft structure, such as a leather cover or a cloth cover, the shell 30 is attached to the surface cover 50, the shell 30 is located on the front side surface of the surface cover 50, the shell 30 is located on the outer side of the surface cover 50, a yielding hole (not shown) is formed in the surface cover 50, the shell 30 and the connecting structure 40 are connected through a connecting piece (not shown), and the connecting piece is inserted through the yielding hole. Specifically, the connecting member may include a connecting member protrusion, which is a structure integrated with the housing 30, extends into the face sleeve 50 from the avoiding hole, and is fixed to the connecting structure 40. Alternatively, the coupling projection may be a structure integrated with the coupling structure 40. In addition, the connecting member may further include a screw for locking the connecting projection and the connecting structure 40.

In addition, in some embodiments, a cover 50 covering the outer surface of the backrest main body 10 is used as the connecting structure 40, and the cover 50 is generally made of a soft leather or cloth structure, which has a certain cushioning effect. The housing 30 is directly secured to the mask 50. In addition, a buffer member may be provided between the rear side of the cover 50 and the back main body 10 for shock absorption.

Referring to fig. 3, in some embodiments, the connecting structure 40 includes a supporting member 41, and the supporting member 41 is located at the front side of the backrest body 10 and fixed with the backrest body 10. The housing 30 is mounted on the support 41, and the housing 30 is located at the front side of the support 41; the support 41 is provided with a first region 413. After the first region 413 is disposed on the supporting member 41, because a part of the solid structure is removed, the first region 413 locally weakens a part of the rigidity of the supporting member 41, so that the strength of the supporting member 41 in the first region 413 is relatively low, so as to create a starting point of deformation when bearing an external force, and the supporting member 41 can generate a certain elastic deformation with the first region 413 as the starting point when bearing the external force, so as to buffer the force transmitted to the housing 30.

The supporting member 41 may be made of a relatively hard material, such as a plastic structure or a metal structure. Alternatively, the supporting member 41 is a plastic member, so as to facilitate the integral injection molding of a more complicated structural member. The overall stiffness of the support 41 may be high to provide a good support for the housing 30 and prevent the housing 30 from collapsing backwards.

It should be noted that the first region 413 may be a hole-shaped structure such as a through hole or a groove, and is not limited in particular. For example, the supporting member 41 may be provided with a plurality of first regions 413, wherein a portion of the first regions 413 are through holes, and another portion of the first regions 413 are grooves. The aperture of the first region 413 may be set to be large as long as it is ensured that the supporting member 41 has sufficient strength without breaking at the first region 413. The first region 413 may be in the form of a circular hole, a semicircular hole, a square hole, an irregularly shaped hole, or the like. The first region 413 may be a through hole because the through hole is formed. Of course, the first region 413 may also be a thin wall formed by thinning certain positions of the supporting member 41 to reduce the rigidity thereof, and the thin wall formed by thinning may also be regarded as a groove.

Alternatively, the left and right edges of the supporting member 41 are respectively provided with a first region 413 in a notch shape, the first region 413 of the left edge penetrates the left side of the supporting member 41 leftwards, and the first region 413 of the right edge penetrates the right side of the supporting member 41 rightwards. Therefore, the left side and the right side of the supporting member 41 both form a notch, and the upper half part of the supporting member 41 can be bent relative to the lower end by taking the notch as the center.

Taking the example that the support 41 is provided with one first area 413 on each of the left and right sides, specifically, the support 41 includes a first portion 411 and a second portion 412 which are distributed from the bottom to the top and connected, and the first area 413 is provided at the connection position of the first portion 411 and the second portion 412. The first portion 411 may be bent with respect to the second portion 412 when impacted by an external force.

Alternatively, the first region 413 is disposed substantially out of the way of the housing 30, i.e., the housing 30 and the first region 413 do not substantially overlap. Specifically, the first region 413 is located substantially above the housing 30. In some embodiments, the shell 30 is mounted on the first portion 411, and the shell 30 and the second portion 412 do not overlap, that is, the shell 30 and the second portion 412 do not have a connection relationship and a contact relationship, when the backrest 100 is impacted by an external force and the external force is transmitted to the supporting member 41, the second portion 412 absorbs the external force slowly by bending relative to the first portion 411, so that the shaking amplitude of the shell 30 and the first portion 411 can be reduced, and the damage can be reduced.

In order to better reduce the damage to the occupant and to have a better weakening effect, in some embodiments, the first portion 411 is fixed to the backrest body 10, the first portion 411 is located directly in front of the backrest body 10, the top end of the first portion 411 is substantially flush with the top end of the backrest body 10 or slightly lower than the top end of the backrest body 10, the second portion 412 is located above the backrest body 10, and the first area 413 is at least partially located above the topmost end of the backrest body 10. In this embodiment, the first portion 411 substantially leans against the backrest main body 10, the second portion 412 protrudes above the backrest main body 10, and the rear side of the second portion 412 is not shielded by the backrest main body 10, so that when the backrest 100 is subjected to an external force, the second portion 412 similar to a suspension can be forced to elastically deform relative to the first portion 411 to release the external force, so that the external force is effectively absorbed, and the external force applied to the first portion 411 can be weakened, thereby weakening the impact force applied to the occupant.

In the above, the headrest 20 may be provided at the second portion 412.

Referring to fig. 3 to 6 in combination, further, the connecting structure 40 further includes an elastic member 42, and the elastic member 42 is also located between the shell 30 and the backrest main body 10. The elastic member 42 in this embodiment may be used alone, that is, the backrest 100 is not provided with the supporting member 41, or the elastic member 42 may be used in combination with the supporting member 41 described above. In some embodiments, the elastic member 42 is disposed between the support member 41 and the back main body 10. The elastic member 42 itself is soft and can easily generate a certain elastic deformation when receiving an external force, and well absorbs the external force, thereby allowing the supporting member 41 to generate a certain elastic deformation so as not to be broken, thereby attenuating the impact force applied to the occupant. The impact force applied to the occupant can be greatly attenuated by the dual energy absorbing action of the elastic member 42 and the support member 41 provided with the first region 413.

Further, the elastic member 42 is provided with an energy absorbing groove 421. In particular the elastic element 42 may be provided with one or more energy absorbing grooves 421. Illustratively, four energy-absorbing grooves 421 are formed in the front side surface of the elastic member 42, wherein a part of the energy-absorbing grooves 421 are through grooves, i.e., the through grooves penetrate through the elastic member 42 in the front-rear direction, and the other part of the energy-absorbing grooves 421 do not penetrate through the through grooves. The energy absorption grooves 421 may absorb a part of the external force, thereby reducing the external force transmitted to the occupant.

The shape and size of the energy absorption grooves 421 are not limited, and may be rectangular, oval, irregular, etc. The middle of the elastic member 42 may be provided with a larger energy absorption groove 421, and both sides may be provided with smaller energy absorption grooves 421. Alternatively, the energy absorbing grooves 421 at all positions of the elastic member 42 are the same in size.

In some embodiments, the elastic member 42 is fixed to the supporting member 41, and the fixing manner may be clamping, bonding, or the like. Illustratively, the rear side of the support 41 is provided with a tree-shaped buckle 414, and the tree-shaped buckle 414 is similar to the shape of a Christmas tree. The elastic member 42 is provided with a mounting hole 422, the mounting hole 422 penetrates the elastic member 42 along the front-rear direction, and the tree-shaped buckle 414 penetrates the mounting hole 422 from front to rear and is clamped on the rear side surface of the elastic member 42. Of course, in other embodiments, the shape of the clasp may be other and is not limited to tree clasp 414.

In addition, the supporting member 41 is fixed to the backrest body 10, and the elastic member 42 is sandwiched between the supporting member 41 and the backrest body 10, and is clamped by the supporting member 41 and the backrest body 10 together. Meanwhile, the elastic part 42 is also clamped with the supporting part 41, so that positioning and certain fixing effects are realized.

In some embodiments, the elastic member 42 includes a first segment 423 and a second segment 424, the second segment 424 is disposed at an upper end of the first segment 423 and protrudes behind the first segment 423, and the first segment 423 and the second segment 424 generally form an L-shaped structure. The first segment 423 abuts against the front side of the backrest main body 10, and the first segment 423 is clamped and limited by the front side of the backrest main body 10 and the rear side of the support 41. The second segment 424 is overlapped with the first surface 111 of the backrest main body 10, the first surface 111 is an upper surface of the backrest main body 10, and the upper surface of the backrest main body 10 limits the downward movement of the second segment 424. Further, the mounting hole 422 in the above embodiment is provided at the first section 423. Further, an energy absorbing groove 421 may be provided at the junction of the first section 423 and the second section 424.

The front side of the elastic element 42 may have a shape substantially matching the shape of the first portion 411 of the supporting element 41, and both may form a structure similar to a semicircle and approximate to the shape of the housing 30, i.e. the housing 30, the first portion 411 of the supporting element 41, and the first segment 423 of the elastic element 42 are substantially overlapped in sequence in the front-back direction. That is, the orthographic projections of the housing 30 and the first portion 411 of the support 41 on the resilient member 42, respectively, each fall substantially within the outer edge of the first segment 423 of the resilient member 42 and substantially coincide with the outer edge of the first segment 423. The elastic member 42 can thereby exert an energy absorbing action directly behind the housing 30, and attenuate the external force transmitted to the housing 30. At the same time, the first portion 411 of the support member 41 supports just the shell 30 providing a rigid support so that the shell 30 is better supported on the back of the occupant and the first portion 411 is not too large and extends beyond the perimeter of the shell 30 resulting in other areas around the shell 30 being too rigid. The first region 413 of the support 41 is close to the housing 30, and the first region 413 converts the external force into the back and forth movement of the second part 412 so that the external force is effectively absorbed by the second part 412.

The backrest main body 10 may include a frame 11 and a frame 12, the frame 12 may be a U-shaped structure with an opening facing downward, the frame 11 is disposed on a cross beam at the top of the frame 12, and the frame 11 is a substantially elongated structure extending in the left-right direction. The support member 41 is fixed to the frame 11, and the elastic member 42 is disposed between the support member 41 and the frame 11.

The elastic member 42 may be a foam, and specifically, EPP may be used, and the EPP is a polypropylene plastic foam material, which is a high crystalline polymer/gas composite material with excellent performance. Alternatively, the elastic member 42 may be made of other soft materials such as EPDM (ethylene propylene diene monomer), TPV (thermoplastic vulcanizate), and the like. Of course, the elastic member 42 may also be a porous structure such as a foam member or a sponge, which can absorb the external force well.

In the embodiments of the present application, at least two solutions for weakening are provided: the first is to weaken the structure of the support member, i.e., the support member 41 itself, by the first region 413, so that the support member 41 can be elastically deformed with the first region 413 as a starting point to absorb an impact force. The second is to add a soft component, namely the elastic component 42 for buffering, so as to increase the weakening space. Furthermore, it is also possible to ensure an effective deformation of the shell 30 after the dummy has been placed on it by means of a solution in which the shell 30 is directly fixed to the mask 50. Therefore, the problems of comfort and safety are solved while the design novelty of the model is ensured.

The following describes the technical solution in the embodiment of the present application with reference to a specific application scenario.

When the vehicle seat back 100 receives an impact force from the rear, the impact force acts on the elastic member 42 first, the elastic member 42 deforms to absorb a part of the impact force, and the first portion 411 of the supporting member 41 fixed thereto is deformed relative to the second portion 412 with the first region 413 as a starting point, and the first portion 411 bends and deforms relative to the second portion 412 to absorb the impact force. Therefore, the impact force from the outside is absorbed by the elastic member 42 and the supporting member 41, so that the impact force applied to the shell 30 can be weakened, and the shell 30 can move in the front-rear direction under the driving of the elastic member 42 and the supporting member 41 to form a buffer, thereby reducing the damage to the passenger.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A backrest, characterized in that it is applied to a seat for a vehicle, comprising:

a backrest body;

the shell is arranged on the front side of the backrest main body and is close to a headrest of the seat, the shell is a hard piece, and the headrest is arranged above the backrest main body; and (c) a second step of,

a connecting structure provided between the backrest main body and the housing;

2. The backrest according to claim 1, wherein the connecting structure comprises a support member located at a front side of the backrest body and fixed with the backrest body;

the support piece is provided with a first area which is a through hole or a groove;

3. The backrest as claimed in claim 2, wherein the support member includes a first portion and a second portion which are distributed from bottom to top and are connected, the first region being provided at a connection of the first portion and the second portion;

4. The back of claim 3, wherein the first portion is fixed with the back body and the second portion is positioned above the back body.

5. The back of claim 4, wherein the top end of the first portion is flush with the top end of the back body or is lower than and proximate to the top end of the back body.

6. The backrest of claim 2, wherein the left and right side edges of the support member are provided with the first regions in the shape of notches, respectively.

7. The backrest according to any one of claims 2 to 6, characterized in that the connection structure further comprises an elastic member provided between the support member and the backrest body;

8. The backrest according to claim 7, wherein the elastic member includes a first section and a second section, the second section being provided at an upper end of the first section and protruding at a rear side of the first section; the first section is abutted against the front side face of the backrest main body, and the second section is lapped on the upper surface of the backrest main body.

9. The back-rest of claim 7, wherein the resilient member and the support member are snap-fit.

10. The back-rest according to claim 7, wherein said elastic member is provided with an energy absorbing groove.

11. The backrest according to claim 1, wherein the connecting structure further comprises a surface cover, the surface cover is of a soft structure, the surface cover is wrapped on the outer side of the backrest main body, the shell is located on the front side surface of the surface cover, and the shell is fixed with the surface cover.

12. A seat comprising a backrest as claimed in any one of claims 1 to 11.

13. A vehicle comprising a seat as claimed in claim 12.