CN113479124B

CN113479124B - Seat assembly and vehicle

Info

Publication number: CN113479124B
Application number: CN202110897783.8A
Authority: CN
Inventors: 廖翠龙; 苏婷
Original assignee: Nuo Chuang Auto Technology Shanghai Co ltd
Current assignee: Nuo Chuang Auto Technology Shanghai Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-12-23
Anticipated expiration: 2041-08-05
Also published as: CN113479124A

Abstract

The invention provides a seat assembly and a vehicle, comprising a seat with a cushion assembly and a leg rest mechanism, wherein the seat assembly comprises: a fixed bracket; the leg support base frame is slidably arranged in the fixed support and is switched between a contraction state in the fixed support and an extension state at least partially extending out of the fixed support; the recovery device is arranged on the lower side of the fixed support and comprises a winding drum; the face cover subassembly, the part parcel fixed bolster of face cover subassembly, the other end of face cover subassembly is walked around fixed bolster and leg and is held in the palm the chassis and be connected with the reel, and the fixed bolster rotationally establishes the front end at the seat, and the one end of keeping away from the reel of face cover subassembly is connected with the cushion subassembly. The seat assembly can enable the seat and the leg support mechanism to form integrated seamless connection, has good leg support and comfortable perception, is convenient to place in a compact space, reduces the occupied space, and can realize the extension and the recovery of a longer face sleeve assembly.

Description

Seat assembly and vehicle

Technical Field

The invention relates to the technical field of automobiles, in particular to a seat assembly and an automobile.

Background

In the related art, the length of the leg rest mechanism of the seat assembly is limited, and the leg rest mechanism and the seat have a gap, which affects the appearance and comfort of the user.

Disclosure of Invention

In view of the above, the present invention is directed to a seat assembly and a vehicle, where the seat assembly enables a seat and a leg rest mechanism to form an integrated seamless connection, has good leg support and comfort perception, is convenient to place in a compact space, reduces an occupied space, and can implement extension and retraction of a longer cover assembly.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a seat assembly comprising a seat having a cushion assembly and a leg rest mechanism, and the leg rest mechanism comprising: fixing a bracket; the leg support underframe is slidably arranged in the fixed support, and the leg support underframe is switched between a contraction state in the fixed support and an extension state of at least partially extending out of the fixed support; the recovery device is arranged on the lower side of the fixed support and comprises a winding drum; the face cover subassembly, the part parcel of face cover subassembly the fixed bolster, the one end of face cover subassembly is fixed, the other end of face cover subassembly is walked around the fixed bolster with the leg holds in the palm the chassis with the reel is connected, wherein, the fixed bolster rotationally establishes the front end of seat, keeping away from of face cover subassembly the one end of reel with the cushion subassembly is connected.

According to a seat assembly of an embodiment of the present invention, the leg rest mechanism further comprises a track assembly comprising: the first rail is connected with the fixed support, the second rail is connected with the leg support base frame, and the first rail is connected with the second rail in a slidable mode.

According to the seat assembly of the embodiment of the invention, the track assembly further comprises a third track, the third track is connected with the fixed bracket, and the first track is connected with the third track in a sliding manner.

According to the seat assembly provided by the embodiment of the invention, the leg rest mechanism further comprises a supporting bracket, the supporting bracket is slidably connected with the leg rest base frame and the fixed bracket, and when the leg rest base frame is in a state of the longest extending length, at least part of the supporting bracket is positioned between the fixed bracket and the leg rest base frame to support the face cover assembly.

According to the seat assembly provided by the embodiment of the invention, the two track assemblies are respectively arranged on two opposite sides of the fixed support and the leg support underframe.

According to the seat assembly of the embodiment of the invention, the leg rest mechanism further comprises a driving mechanism, the driving mechanism is arranged on the fixed support, and the driving mechanism is connected with the leg rest base frame so as to drive the leg rest base frame to be switched between the contraction state and the extension state.

According to a seat assembly of an embodiment of the present invention, the drive mechanism includes: the driving motor is provided with a first output shaft and a second output shaft which are oppositely arranged; the first screw rod is connected with the first output shaft, and the second screw rod is connected with the second output shaft; the first moving piece is sleeved on the first lead screw and driven to move by the first lead screw, the second moving piece is sleeved on the second lead screw and driven to move by the second lead screw, the first moving piece is connected with the fixed support, and the second moving piece is connected with the leg support base frame.

According to a seat assembly of an embodiment of the present invention, the face cover assembly includes: one end of the face sleeve is fixed, and the other end of the face sleeve is connected with the winding drum; the foaming piece is stacked with the face sleeve and is positioned on one side, facing the fixed support, of the face sleeve.

According to the seat assembly provided by the embodiment of the invention, the leg support mechanism further comprises a lifting mechanism, and the lifting mechanism is connected with the fixed support to drive the fixed support to rotate.

Compared with the prior art, the seat assembly can be switched between the contraction state and the extension state through the leg support base frame, can meet the use requirements of users, provides good leg support and comfortable perception, is convenient for the leg support mechanism to be placed in a compact space, and reduces the occupied space. One end through face cover subassembly is connected with the cushion subassembly, and the other end is connected with the reel, when leg support underframe removed, the reel can realize accomodating and releasing of face cover subassembly, it can tightly be cladding on fixed bolster and leg support underframe to ensure face cover subassembly, the planarization is good, can realize stretching out and retrieving of longer face cover subassembly, and the clearance between the cushion subassembly of face cover subassembly and seat on the leg support mechanism has been avoided, can make the seat and leg support mechanism form the seamless connection of integral type, the appearance is pleasing to the eye, the comfort level has been improved simultaneously.

A vehicle according to a second aspect of the invention includes a seat assembly as described in any one of the first aspects. The vehicle and the seat assembly have the same advantages as the seat assembly described above with respect to the prior art, and are not described in detail herein.

Additional aspects and advantages of the invention 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 invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:

fig. 1 is a schematic structural view of a leg rest mechanism according to an embodiment of the present invention;

FIG. 2 is an exploded view of a leg rest mechanism according to an embodiment of the present invention;

FIG. 3 is a left side view of the leg rest mechanism according to an embodiment of the present invention (wherein the leg rest mechanism is in an initial state);

FIG. 4 is a left side view of the legrest mechanism according to an embodiment of the present invention (wherein the legrest mechanism is in the raised position of the first embodiment);

FIG. 5 is a left side view of the leg rest mechanism according to an embodiment of the present invention (wherein the leg rest mechanism is in an extended state);

FIG. 6 is a schematic diagram illustrating a movement state of the leg rest mechanism according to the embodiment of the present invention;

FIG. 7 is a left side view of the legrest mechanism according to an embodiment of the present invention (wherein the legrest mechanism is in a raised position according to a second embodiment);

FIG. 8 is a top view of the legrest mechanism according to an embodiment of the present invention (wherein the legrest mechanism is in a raised position according to a second embodiment);

FIG. 9 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 8;

FIG. 10 is a top view of a leg rest mechanism according to an embodiment of the present invention (wherein the mask assembly is not shown);

FIG. 11 is a schematic structural diagram of a driving mechanism according to an embodiment of the present invention;

FIG. 12 is an exploded view of a legrest mechanism according to an embodiment of the present invention (wherein the lifting mechanism is not shown);

FIG. 13 is an enlarged schematic view of FIG. 12 at circle B;

FIG. 14 is a schematic view of a second thrust cap according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a recycling apparatus according to an embodiment of the present invention;

FIG. 16 is a right side view of a recycling appliance according to an embodiment of the present invention;

FIG. 17 is a sectional view taken along line C-C of FIG. 16;

FIG. 18 is an enlarged structural view taken at circle D in FIG. 17;

FIG. 19 is an enlarged schematic view of FIG. 17 at E;

FIG. 20 is a top view of the leg rest mechanism according to an embodiment of the present invention (wherein the leg rest mechanism is in a retracted state);

FIG. 21 is a cross-sectional view taken along line F-F of FIG. 20;

FIG. 22 is an enlarged schematic view of FIG. 21 at circle G;

FIG. 23 is a sectional view taken along line H-H of FIG. 20;

FIG. 24 is a top view of the leg rest mechanism according to an embodiment of the present invention (wherein the leg rest mechanism is in an extended state);

fig. 25 is a sectional view taken along the line I-I in fig. 24.

Description of reference numerals:

100-a leg rest mechanism, wherein the leg rest mechanism,

10-a fixed support, 11-a rotating shaft,

20-a leg-supporting bottom frame is arranged,

30-recovery device, 31-winding drum, 32-first thrust cap, 33-second thrust cap, 34-spring, 35-first bushing, 36-first bracket, 37-second bracket, 38-bolt, 39-washer, 331-limit bump, 311-limit groove, 312-bump structure, 313-mounting hole, 371-rotating hole, 381-clamping groove, 382-second bushing,

40-dough cover component, 41-dough cover, 42-foaming piece,

50-track assembly, 51-first track, 52-second track, 53-third track,

60-support brackets, reinforcing ribs 61,

70-a drive mechanism, 71-a drive motor, 72-a first screw rod, 73-a second screw rod, 74-a first moving member, 75-a second moving member, 76-a gear assembly, 711-a first output shaft, 712-a second output shaft, 761-a first gearwheel, 762-a first pinion, 763-a second gearwheel, 764-a second pinion,

80-lifting mechanism, 81-motor, 82-lead screw, 90-guiding mechanism.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

A seat assembly according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 25 in conjunction with the embodiment. The seat assembly may be, but is not limited to, a massage chair, a vehicle seat, and the like. The following description will take the seat assembly as an example of a vehicle seat.

As shown in fig. 1-8, the seat assembly of the embodiment of the present invention includes a seat and leg rest mechanism 100, and the seat has a cushion assembly, which can effectively improve the comfort of the seat. And the leg rest mechanism 100 may include: a fixed bracket 10 and a leg rest base 20.

Particularly, the fixing bracket 10 is rotatably arranged at the front end of the seat, so that the angle adjustment of the fixing bracket 10 can be realized, the angle adjustment of the leg support mechanism 100 can be realized, the comfort level is improved, and the comfort level requirements of different people can be met. The legrest base 20 is slidably disposed within the fixed support 10, and the legrest base 20 is switchable between a retracted state and an extended state. In a contracted state, the leg rest base frame 20 can be positioned in the fixed support 10, so that the leg rest mechanism 100 is convenient to mount and place, and the occupied space is small; in the extended state, the leg rest chassis 20 may at least partially extend beyond the fixed support 10, which may increase the length of the leg rest mechanism 100 to meet the support length requirements of the user.

Therefore, when the leg rest mechanism 100 is used, the leg rest base 20 can be in an extended state, which can meet the use requirements of users and provide good leg support and comfort perception; when the leg rest mechanism 100 is not used, the leg rest base 20 can be in a contracted state, so that the leg rest mechanism 100 can be conveniently placed in a compact space, and the occupied space is reduced.

In addition, as shown in fig. 1 to 7, the leg rest mechanism 100 further includes a recovery device 30 and a mask assembly 40, and the recovery device 30 may be disposed at a lower side of the fixing bracket 10, so as to reduce an occupied space and make an appearance beautiful. The recovery device 30 may include a roller 31, and a portion of the mask assembly 40 wraps around the fixing support 10 to improve the comfort of the leg rest mechanism 100. One end of the face sleeve assembly 40 can be fixed, and the other end of the face sleeve assembly 40 is connected with the winding drum 31 by bypassing the fixed support 10 and the leg rest base frame 20, so that the face sleeve assembly 40 can be extended or bent along with the movement of the leg rest base frame 20.

Wherein, the one end of keeping away from reel 31 of face cover subassembly 40 can be connected with the cushion subassembly and realize face cover subassembly 40 fixed for face cover subassembly 40 can form integratively with the cushion subassembly, has avoided the clearance between the cushion subassembly of face cover subassembly 40 on the leg support mechanism 100 and seat, forms the seamless connection of integral type, and the appearance is pleasing to the eye, improves user's travelling comfort.

For example, when the leg rest base 20 is in a contracted state, the leg rest base 20 is located in the fixed support 10, the face cover assembly 40 wraps the upper surface of the fixed support 10, part of the face cover assembly 40 is wound on the winding drum 31, the winding drum 31 can retract the redundant face cover assembly 40, the face cover assembly 40 can be tightly wrapped on the fixed support 10, and good flatness is ensured. With the leg rest chassis 20 in the extended position, the mask assembly 40 is released from the reel 31 and the portion of the mask assembly 40 located below the leg rest chassis 20 is moved over the leg rest chassis 20. When leg holds in the palm undercarriage 20 and switches to the state of stretching out by the contraction state, face cover subassembly 40 can stably wrap up on leg holds in the palm undercarriage 20 and fixed bolster 10, and face cover subassembly 40 and cushion subassembly structure as an organic whole all the time, and face cover subassembly 40 combines well with the cushion subassembly, realizes seamless connection, improves leg and holds in the palm the use comfort of mechanism 100.

In addition, the storage and release of the facial mask assembly 40 are realized through the winding drum 31, the facial mask assembly 40 can be extended and recovered in a long length, and the requirement of the extending length of the leg support mechanism 100 is met.

According to the seat assembly provided by the embodiment of the invention, the leg rest base frame 20 can be switched between the retracted state and the extended state, so that the use requirements of users can be met, good leg support and comfort perception are provided, the leg rest mechanism 100 can be conveniently placed in a compact space, and the occupied space is reduced. One end through face cover subassembly 40 is connected with the cushion subassembly, and the other end is connected with reel 31, when leg support underframe 20 removed, reel 31 can realize accomodating and releasing of face cover subassembly 40, ensure that face cover subassembly 40 can tightly cladding on fixed bolster 10 and leg support underframe 20, the planarization is good, can realize stretching out and retrieving of longer face cover subassembly 40, and avoided the clearance between the cushion subassembly of face cover subassembly 40 and the seat on leg support mechanism 100, can make the seat and leg support mechanism 100 form the seamless connection of integral type, the appearance is pleasing to the eye has been guaranteed, and the comfort level is improved simultaneously.

A vehicle according to an embodiment of the present invention includes a seat assembly according to an embodiment of the present invention. Because the seat assembly according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the vehicle according to the embodiment of the present invention can switch between the retracted state and the extended state through the leg rest base 20, so as to meet the use requirements of the user, provide good leg support and comfort perception, and facilitate the placement of the leg rest mechanism 100 in a compact space, thereby reducing the occupied space. Through the one end and the cushion subassembly connection of face cover subassembly 40, and the other end is connected with reel 31, when leg support underframe 20 removed, reel 31 can realize accomodating and releasing of face cover subassembly 40, ensure that face cover subassembly 40 can tightly the cladding on fixed bolster 10 and leg support underframe 20, the planarization is good, can realize stretching out and retrieving of longer face cover subassembly 40, and avoided the clearance between the cushion subassembly of face cover subassembly 40 on leg support mechanism 100 and seat, can make the seat and leg support mechanism 100 form the seamless connection of integral type, the appearance is pleasing to the eye has been guaranteed, the comfort level has been improved simultaneously.

According to some embodiments of the present invention, as shown in fig. 1 to 7, the leg rest mechanism 100 further includes a rail assembly 50, the rail assembly 50 may include a first rail 51 and a second rail 52, the first rail 51 is connected to the fixed bracket 10, the second rail 52 is connected to the leg rest base 20, the first rail 51 and the second rail 52 are slidably connected, and the slidable connection between the leg rest base 20 and the fixed bracket 10 is facilitated by the mutual movement of the first rail 51 and the second rail 52, so as to facilitate the switching of the leg rest mechanism 100 between the retracted state and the extended state. Meanwhile, the leg support underframe 20 is movably supported through the track assembly 50, so that the structure is simple, the movement is smooth, and the movement effect is good. When the leg rest base frame 20 is in the extended state, the leg rest mechanism 100 can be supported for a longer length, and the leg support comfort of the user can be improved.

In some embodiments, as shown in fig. 24, the rail assembly 50 further includes a third rail 53, the third rail 53 may be connected to the fixing bracket 10, the first rail 51 is slidably connected to the third rail 53, so that the first rail 51 may connect the second rail 52 to the third rail 53, and the extension length may be further increased by connecting the first rail 51, the second rail 52 and the third rail 53 to each other, which may better meet the requirement of the supporting length for comfort. When the leg rest chassis 20 is switched from the retracted state to the extended state, when the first rail 51 is located in the third rail 53 and the second rail 52 is extended from the first rail 51 to the maximum, the leg rest mechanism 100 realizes the primary extension, and when the first rail 51 is extended from the third rail 53 to the maximum and the second rail 52 is extended from the first rail 51 to the maximum, the leg rest mechanism 100 realizes the secondary extension.

Meanwhile, under the condition of the same extension length, by matching the first rail 51, the second rail 52 and the third rail 53, the leg rest mechanism 100 can be smaller in size when the leg rest base 20 is in the contracted state, and can be conveniently arranged and installed in a smaller space. Under the condition that the length of each of the first rail 51, the second rail 52 and the third rail 53 is the same, and under the state that the leg rest underframe 20 is in the secondary maximum extension length state, a longer support length can be provided, the support length requirement of comfort is met, and the multi-use requirements of the leg rest mechanism 100 are met.

In some embodiments, the first rail 51, the second rail 52, and the third rail 53 may be limited by a retainer and a stop point, so as to prevent the first rail from falling off during the moving process, and ensure the normal operation of the leg rest mechanism 100.

In some embodiments, the first rail 51 and the fixed bracket 10 may be connected by a plurality of fasteners, the second rail 52 and the leg rest base 20 may be connected by a plurality of fasteners, the third rail 53 and the first rail 51 may be connected by a sliding pair, and the first rail 51 and the second rail 52 may be connected by a sliding pair, so as to ensure that the first rail 51 and the fixed bracket 10, the second rail 52 and the leg rest base 20 are stably connected, are not easily separated, and have a good moving effect. For example, the fastener may be a bolt.

In the embodiment of the present invention, the number of the fastening members may be flexibly configured according to actual situations, for example, the number of the fastening members may be two, and may also be three, four, five, six or more, which is within the protection scope of the present invention.

In some embodiments of the present invention, as shown in fig. 9, 10, 21, 23 and 25, the leg rest mechanism 100 further includes a supporting bracket 60, the supporting bracket 60 is slidably connected to the leg rest base 20, and the supporting bracket 60 is slidably connected to the fixing bracket 10, when the leg rest base 20 is in a state of the longest protruding length, the leg rest base 20 and the fixing bracket 10 are spaced apart, so that at least a portion of the supporting bracket 60 can be located between the fixing bracket 10 and the leg rest base 20, and the supporting bracket 60 can provide a good supporting effect for the fixing bracket 10 and the leg rest base 20, and prevent the gravity of the leg from exerting pressure on the leg rest mechanism 100 to cause a local stress damage to the structure. Meanwhile, the supporting bracket 60 can support the surface cover assembly 40 between the fixing bracket 10 and the leg rest base frame 20, so that the phenomenon that the comfort is influenced due to the fact that the fixing bracket 10 and the leg rest base frame 20 are sunken is avoided, and the leg rest mechanism 100 is more comfortable to use.

When the leg rest base frame 20 is switched from the retracted state to the extended state, the leg rest base frame 20 may drive the supporting bracket 60 to slide in a direction away from the fixing bracket 10, and when the leg rest base frame 20 is spaced apart from the fixing bracket 10, at least a portion of the supporting bracket 60 may be located between the fixing bracket 10 and the leg rest base frame 20.

In some embodiments, as shown in fig. 2 and 10, a plurality (more than two) of reinforcing ribs 61 extending in the front-rear direction may be disposed on the upper and lower surfaces of the support bracket 60 and the leg rest base 20, and the plurality of reinforcing ribs 61 may be disposed at intervals in the left-right direction, so that the structural strength of the support bracket 60 and the leg rest base 20 is effectively improved. In addition, when the structural strength is the same, the weight of the support bracket 60 and the leg rest base 20 can be reduced by providing the reinforcing rib 61, and the cost can be reduced.

In addition, as shown in fig. 10, a groove can be formed between every two of the reinforcing ribs 61 of the supporting bracket 60, the reinforcing ribs 61 of the leg rest base frame 20 can be located in the groove, and when the supporting bracket 60 and the leg rest base frame 20 move relative to each other, the plurality of reinforcing ribs 61 are matched with the plurality of grooves, so that a better guiding effect can be achieved, mutual left-right sliding is avoided, and accurate front-back sliding of the supporting bracket 60 and the leg rest base frame 20 is ensured.

In some embodiments, as shown in fig. 2 and 24, two track assemblies 50 may be provided, and two track assemblies 50 may be respectively provided at two opposite sides of the fixing bracket 10 and the leg rest base 20, so as to ensure that the two sides of the fixing bracket 10 and the leg rest base 20 are stressed equally, so that the movement is balanced and stable, and the leg rest base 20 is prevented from shifting during the movement.

According to some embodiments of the present invention, as shown in fig. 9, 11, 23 and 25, the leg rest mechanism 100 further includes a driving mechanism 70, the driving mechanism 70 may be disposed on the fixing support 10, the driving mechanism 70 may be connected to the leg rest base 20, and the driving mechanism 70 may drive the leg rest base 20 to switch between the retracted state and the extended state, so as to extend and retract the length of the leg rest mechanism 100, avoid manual operation, and facilitate the use of the user.

Of course, as shown in fig. 2, the driving mechanism 70 may also be located on the supporting bracket 60 and connected to the leg rest base 20 and the fixing bracket 10, so as to move the supporting bracket 60 conveniently, and eliminate the redundant driving structure, thereby simplifying the internal structure and reducing the cost.

In some embodiments, each stage of the track assembly 50 may be adapted to the drive mechanism 70 to enable the overall simultaneous extension function of the leg rest mechanism 100, facilitating control of the extension length.

In some embodiments, as shown in fig. 9, 11, 23 and 25, the driving mechanism 70 includes a driving motor 71, a first lead screw 72, a second lead screw 73, a first moving member 74 and a second moving member 75. The driving motor 71 has a first output shaft 711 and a second output shaft 712 which are oppositely arranged, the first lead screw 72 is connected with the first output shaft 711, the first lead screw 72 can be driven by the first output shaft 711 to rotate, the second lead screw 73 is connected with the second output shaft 712, and the second lead screw 73 can be driven by the second output shaft 712 to rotate. The first moving piece 74 is sleeved on the first screw rod 72, the first moving piece 74 can be driven to move by the first screw rod 72, the second moving piece 75 is sleeved on the second screw rod 73, the second moving piece 75 can be driven to move by the second screw rod 73, the first moving piece 74 is connected with the fixed support 10, and the second moving piece 75 is connected with the leg rest base 20.

When the driving motor 71 starts to work, the first output shaft 711 and the second output shaft 712 of the driving motor 71 start to rotate, the first output shaft 711 drives the first screw rod 72 to rotate, the first screw rod 72 can drive the first moving piece 74 to move, the second output shaft 712 drives the second screw rod 73 to rotate, the second screw rod 73 can drive the second moving piece 75 to move, the leg support base frame 20 can be quickly pushed to move through the simultaneous movement of the first moving piece 74 and the second moving piece 75, the requirement for large length driving is met in a compact space, and good leg support comfort perception is provided for a user.

In some embodiments, as shown in fig. 11, the drive mechanism 70 may include a gear assembly 76, and the gear assembly 76 may include a first bull gear 761, a first pinion gear 762, a second bull gear 763, and a second pinion gear 764. The first pinion 762 is located on the first output shaft 711, the first gearwheel 761 is located on the first screw rod 72, the first gearwheel 761 is engaged with the first pinion 762, the second pinion 764 is located on the second output shaft 712, the second gearwheel 763 is located on the second screw rod 73, the second gearwheel 763 is engaged with the second pinion 764, the driving motor 71 can be located between the first screw rod 72 and the second screw rod 73, the driving motor 71, the first screw rod 72, and the second screw rod 73 are arranged side by side, for example, the driving motor 71, the first screw rod 72, and the second screw rod 73 are arranged side by side in a front-back direction perpendicular to that shown in fig. 11, so that the length dimension (for example, the dimension in the front-back direction in fig. 11) of the driving mechanism 70 can be effectively reduced, the occupied area of the driving mechanism 70 is favorably reduced, the installation and the arrangement of the leg rest mechanism 100 in a compact space are facilitated, and the spatial arrangement requirement is met.

For convenience of description, the orientations of the present invention such as "front-back direction", "left-right direction", "up-down direction", etc. are based on the orientation relationship shown in the drawings, and are not limited to the orientation in the practical application.

In some embodiments of the present invention, as shown in fig. 3-7, 9, 21, 23 and 25, the mask assembly 40 may include a mask 41 and a foaming member 42, one end of the mask 41 is fixed, the other end of the mask 41 may be connected to the winding drum 31, the foaming member 42 and the mask 41 are stacked, and the foaming member 42 is located on one side (e.g., the lower side shown in fig. 7) of the mask 41 facing the fixing bracket 10, so that the mask 41 may protect the foaming member 42, the mask assembly 40 is prevented from being removed entirely for cleaning, only the mask 41 may be replaced for cleaning, the use is more convenient, and the foaming member 42 may increase the softness of the leg rest mechanism 100, thereby improving the comfort of the user.

When the leg rest mechanism 100 extends or lifts, the face sleeve 41 can be reeled out from the winding drum 31 through the connection of the face sleeve 41 and the winding drum 31, and when the leg rest mechanism 100 retracts, the face sleeve 41 can be reeled in the winding drum 31, so that the face sleeve 41 can be more conveniently stored, and the face sleeve 41 can be ensured to be flat without wrinkles.

In some embodiments, the cushion assembly of the seat may include a surface cover and a foaming member, and the surface cover 41 and the foaming member 42 of the surface cover assembly 40 form an integral structure, so that the appearance is beautiful and the comfort is good.

In some embodiments, as shown in fig. 9, 15, 21-25, the leg rest mechanism 100 may include a guiding mechanism 90, the guiding mechanism 90 may be located between the fixed bracket 10 and the winding drum 31, and the other end of the face cover assembly 40 may be connected to the winding drum 31 by passing through the guiding mechanism 90 after passing through the leg rest base 20, so that the face cover assembly 40 located at the lower side of the fixed bracket 10 and the leg rest base 20 is parallel to the face cover assembly 40 located at the upper side of the fixed bracket 10 and the leg rest base 20, and preferably wraps the lower side of the fixed bracket 10 and the leg rest base 20.

Further, an end of the foaming member 42 close to the winding drum 31 is spaced apart from an end of the face cover 41 close to the winding drum 31, the end of the face cover 41 close to the winding drum 31 exceeds the end of the foaming member 42 close to the winding drum 31, and in the contracted state of the leg rest base 20, a portion of the face cover 41 exceeding the foaming member 42 is wound around the winding drum 31, and the foaming member 42 is spaced apart from the winding drum 31. Therefore, the mask assembly 40 is convenient to store, and the space occupied by the foaming piece 42 wound on the winding drum 31 is reduced.

In some embodiments, as shown in fig. 1 to 10, the leg rest mechanism 100 further includes a lifting mechanism 80, the lifting mechanism 80 may be connected to the fixed support 10, and the lifting mechanism 80 may drive the fixed support 10 to rotate, so as to adjust the angle of the leg rest mechanism 100, and meet comfort requirements of different people.

In some embodiments, as shown in fig. 2 to 7, the fixing bracket 10 includes the rotating shaft 11, the lifting mechanism 80 may include a motor 81 and a lead screw 82, the motor 81 is rotatably connected to the fixing bracket 10, the motor 81 is spaced from the rotating axis of the fixing bracket 10 relative to the seat, one end of the lead screw 82 is connected to the motor 81, and the seat is provided with a nut engaged with the lead screw 82, and the nut is rotatably connected to the seat. When the motor 81 starts to work, the motor 81 can drive the lead screw 82 to rotate, the nut moves on the lead screw 82 relatively, and the nut is fixed on the seat, so that the lead screw 82 and the motor 81 connected with the lead screw 82 are driven to move towards the direction away from the seat, and the fixing support 10 is driven to rotate upwards around the rotating shaft 11, and the lifting of the fixing support 10 is realized.

In other embodiments, the lifting mechanism 80 may include a motor 81, and the motor 81 is connected to the rotating shaft 11 of the fixing bracket 10. When the motor 81 starts to work, the motor 81 can drive the rotating shaft 11 to rotate, so as to drive the fixing support 10 to rotate, and thus the fixing support 10 is lifted.

In the embodiment of the present invention, the specific structure of the recycling device 30 can be set according to practical situations.

For example, in some embodiments, as shown in fig. 12 and 17, the recycling device 30 may further include a first thrust cap 32, a second thrust cap 33, and a spring 34, the first thrust cap 32 is disposed at one end of the winding drum 31, the first thrust cap 32 is rotatably connected to the winding drum 31, the second thrust cap 33 is disposed at the other end of the winding drum 31, the second thrust cap 33 is fixedly connected to the winding drum 31, the spring 34 is disposed in the winding drum 31, one end of the spring 34 is connected to the first thrust cap 32, and the other end of the spring 34 is connected to the second thrust cap 33.

When the fixed bracket 10 is lifted, the facial mask assembly 40 moves relatively on the leg rest base frame 20, so that the facial mask assembly 40 on the winding drum 31 is unwound from the winding drum 31 through the rotation of the winding drum 31, the required length of the facial mask assembly 40 in the lifting process is released under the action of the lifting force, the facial mask assembly 40 is driven to rotate, the facial mask assembly 40 wound on the winding drum 31 is released, and the second thrust cap 33 can be driven to rotate when the winding drum 31 rotates. One end of the spring 34 connected with the first thrust cap 32 is fixed, and one end of the spring 34 connected with the second thrust cap 33 rotates, so that the spring 34 can generate elastic deformation, the spring 34 has a tendency of rotating towards the opposite direction, the rest surface sleeve assembly 40 can be tightened, and the seamless connection between the leg support mechanism 100 and the seat in the whole movement process is ensured; when the fixing support 10 returns to the initial position, the face cover assembly 40 rotates in the opposite direction through the elastic deformation of the spring 34, so that the face cover assembly 40 is rolled onto the winding drum 31 again, the face cover assembly 40 is convenient and quick to store, the surface of the leg support mechanism 100 is smooth, and the appearance is attractive.

Or, when the leg rest chassis 20 is in the extended state, the face sleeve assembly 40 moves relatively on the leg rest chassis 20, so that the face sleeve assembly 40 on the winding drum 31 is unwound from the winding drum 31 through the rotation of the winding drum 31, the required length of the face sleeve assembly 40 in the extension process is released under the action of the driving force, the face sleeve assembly 40 is driven to rotate, so that the face sleeve assembly 40 wound on the winding drum 31 is released, and the second thrust cap 33 can be driven to rotate when the winding drum 31 rotates. One end of the spring 34 connected with the first thrust cap 32 is fixed, and one end of the spring 34 connected with the second thrust cap 33 rotates, so that the spring 34 is elastically deformed, the spring 34 has a tendency of rotating towards the opposite direction, the rest of the face sleeve assembly 40 can be tightened, and the seamless connection between the leg rest mechanism 100 and the seat in the whole movement process is ensured; when the leg rest mechanism 100 returns to the initial position (for example, the leg rest mechanism 100 is in the non-lifted state and the non-extended state), the face cover assembly 40 rotates in the opposite direction through the elastic deformation of the spring 34, so that the face cover assembly 40 is wound on the winding drum 31 again, the face cover assembly 40 is conveniently and quickly stored, the surface of the leg rest mechanism 100 is smooth, and the appearance is attractive.

Recovery unit 30 simple structure is favorable to reduction in production cost, and can guarantee that face cover subassembly 40 is clean, clean and tidy. In addition, establish in reel 31 through spring 34, can protect spring 34, guarantee spring 34's normal work, improve life.

In some embodiments, as shown in FIG. 6, the spring 34 may be pre-tensioned, i.e., the spring 34 has a tendency to rotate in an opposite direction. For example, when the leg rest mechanism 100 is in the initial position, the spring 34 has a tendency of rotating counterclockwise, so that the surplus face cover assembly 40 can be wound on the winding drum 31 by the pre-tightening force of the spring 34, and the face cover assembly 40 is kept tight under the pre-tightening force of the spring 34, so that the face cover assembly 40 is kept free of wrinkles during use, and the leg rest mechanism 100 is ensured to have a flat surface, an attractive appearance and a good comfort level.

In some embodiments, as shown in fig. 19, the number of turns of the spring 34 may be 140-160, and the diameter of the spring 34 may be D, and satisfies: d is more than or equal to 2.2mm and less than or equal to 2.6mm, the furling force generated by the spring 34 is uniform in the range, the control is easy, the uniform extension and the uniform retraction of the face sleeve assembly 40 along with the leg support underframe 20 can be realized, the uniform stress of the face sleeve assembly 40 is ensured, and the better flatness is ensured. For example, in some embodiments, the number of turns of spring 34 may be 140, 145, 150, 155, 160, etc., and the diameter D of spring 34 may be 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, etc.

The structure of the recycling device 30 will be further described below with reference to some embodiments.

In some embodiments of the present invention, as shown in fig. 17-19, the first thrust cap 32 is rotatably disposed in the winding drum 31, when the mask assembly 40 is wound on the winding drum 31, the first thrust cap 32 is prevented from being located outside the winding drum 31 to affect the storage of the mask assembly 40, the easy folding caused by the poor winding effect of the mask assembly 40 is avoided, and the aesthetic appearance of the mask assembly 40 is ensured, and the first thrust cap 32 is disposed in the winding drum 31 to facilitate the connection between the first thrust cap 32 and the spring 34 and ensure the reliable connection between the first thrust cap 32 and the spring 34. In addition, a first bush 35 can be arranged between the outer peripheral wall of the first thrust cap 32 and the inner peripheral wall of the winding drum 31, and the first bush 35 can enable the first thrust cap 32 and the winding drum 31 to rotate relatively more smoothly, so that friction between the first thrust cap 32 and the winding drum 31 is reduced, and the service life is prolonged.

According to some embodiments of the present invention, as shown in fig. 12, 17 and 19, the recovery device 30 further comprises a first bracket 36, and the first bracket 36 may be connected with the first thrust cap 32, so that the recovery device 30 may be fixed by the connection of the first bracket 36 with the first thrust cap 32.

In some embodiments, the first bracket 36 and the first thrust cap 32 may be connected by welding, which ensures a reliable connection and low manufacturing costs.

In some embodiments of the present invention, as shown in fig. 18, the second thrust cap 33 may be disposed in the winding drum 31, when the mask assembly 40 is wound on the winding drum 31, the second thrust cap 33 is prevented from being located outside the winding drum 31 to affect the storage of the mask assembly 40, the easy crease of the mask assembly 40 due to the poor winding effect is avoided, and the appearance of the mask assembly 40 is ensured to be beautiful, and the second thrust cap 33 is disposed in the winding drum 31 to facilitate the connection between the second thrust cap 33 and the spring 34, and ensure the reliable connection between the second thrust cap 33 and the spring 34.

In addition, as shown in fig. 13, 14 and 18, the outer peripheral wall of the second thrust cap 33 may be provided with a limiting protrusion 331, the inner peripheral wall of the winding drum 31 is provided with a limiting groove 311, the limiting groove 311 may be matched with the limiting protrusion 331, so as to ensure that the second thrust cap 33 is reliably connected with the winding drum 31, and the second thrust cap 33 may be driven to rotate when the winding drum 31 rotates, so that the spring 34 is stressed, the structure is simple, the slipping can be effectively avoided, and the service life is prolonged.

In some embodiments, as shown in fig. 13 and fig. 22, a protruding structure 312 extending along a length direction (for example, along a left-right direction shown in fig. 17) is provided on an outer circumferential wall of the winding drum 31, a mounting hole 313 is provided on the protruding structure 312, the mounting hole 313 penetrates through a left end face and a right end face of the protruding structure 312, and the mask set assembly 40 can enter from an opening of the mounting hole 313, so that the mask set assembly 40 is mounted and fixed on the winding drum 31, and the mask set assembly 40 is prevented from being detached from the winding drum 31 when being extended, thereby ensuring accurate positioning and stable mounting.

In some embodiments, as shown in fig. 12, 16, 17 and 18, the recovery device 30 further comprises a second bracket 37, and the second bracket 37 may be rotatably connected with the second thrust cap 33, so that the recovery device 30 may be fixed by the connection of the second bracket 37 with the second thrust cap 33.

In some embodiments, as shown in fig. 12 and 17, the recycling device 30 may include a first bracket 36 and a second bracket 37, so that the first bracket 36 and the second bracket 37 can support the winding drum 31 at the same time, and the recycling device 30 is accurately positioned and connected well.

According to some embodiments of the present invention, as shown in fig. 1, 12 and 18, the recycling device 30 further includes a bolt 38, one end of the bolt 38 may be connected to the second thrust cap 33, the other end of the bolt 38 may be rotatably connected to the second bracket 37, so as to facilitate installation of the reel 31, and the bolt 38 may be connected to the second bracket 37 and the second thrust cap 33, so that when the reel 31 drives the second thrust cap 33 to rotate, the bolt 38 may rotate on the second bracket 37, so as to position the reel 31, and enable the second thrust cap 33 to have a simple structure, reduce complexity of parts, and the second thrust cap 33 has a good structural strength.

In some embodiments of the present invention, as shown in fig. 18, the second bracket 37 may be provided with a rotation hole 371, and the bolt 38 may be rotatably disposed in the rotation hole 371, so that the second bracket 37 may support the bolt 38, so as to position the bolt 38, and ensure that the second bracket 37 is reliably connected with the bolt 38. In addition, a washer 39 is arranged between the outer peripheral wall of the bolt 38 and the inner peripheral wall of the rotating hole 371, so that the rotating friction between the bolt 38 and the second bracket 37 can be effectively reduced, the abrasion is reduced, and the bolt 38 and the second bracket 37 are ensured to rotate more smoothly.

In some embodiments, as shown in fig. 18, a clamping groove 381 is formed on an outer peripheral wall of the bolt 38, the clamping groove 381 may extend in a circumferential direction of the bolt 38, the recycling device 30 further includes a second bushing 382, the second bushing 382 may be formed in an open ring shape, so as to facilitate embedding the second bushing 382 in the clamping groove 381, so as to define the second bracket 37 between the second bushing 382 and a head of the bolt 38, when the bolt 38 rotates, the bolt 38 can be prevented from moving in an axial direction (for example, in a left-right direction shown in fig. 17) to cause a poor rotation effect, the second bracket 37 can be prevented from being damaged due to contact with the second thrust cap 33, and a long service life of the recycling device 30 is ensured.

A seat assembly in accordance with one embodiment of the present invention is described in detail below with reference to the accompanying drawings, it being understood that the following description is illustrative only and should not be taken as limiting the invention.

Referring to fig. 2, the seat assembly may include a seat having a cushion assembly and a leg rest mechanism 100 including a fixed bracket 10, a leg rest base 20, a recovery device 30, a surface cover assembly 40, a rail assembly 50, a support bracket 60 and a driving mechanism 70, wherein the recovery device 30 is disposed at a lower side of the fixed bracket 10, and a lifting mechanism 80 is connected to the fixed bracket 10.

As shown in fig. 1 and 12, the recycling device 30 includes a winding drum 31, a first thrust cap 32, a second thrust cap 33, a spring 34, a first bracket 36, a second bracket 37, a bolt 38, and a second bushing 382. The spring 34 is coaxially inserted into the winding drum 31, the right end of the spring 34 is connected with the first thrust cap 32, a first bushing 35 is arranged between the outer circumferential wall of the first thrust cap 32 and the inner circumferential wall of the winding drum 31, the first thrust cap 32 is rotatably connected with the winding drum 31, and the first thrust cap 32 is connected with the first support 36 in a welding mode. The left end of the spring 34 is connected with the second thrust cap 33, the limit protrusion 331 of the second thrust cap 33 is matched with the limit groove 311 of the winding drum 31, the second thrust cap 33 is fixedly connected in the left end of the winding drum 31, the right end of the bolt 38 is connected with the second thrust cap 33, and the left end of the bolt 38 is rotatably arranged in the rotating hole 371 of the second bracket 37.

As shown in fig. 7, the mask assembly 40 includes a mask 41 and a foaming member 42, a portion of the mask assembly 40 wraps the fixing bracket 10, rear ends of the mask 41 and the foaming member 42 are connected to a cushion assembly of the seat, a front end of the mask 41 is connected to the winding drum 31, the foaming member 42 and the mask 41 are stacked, and the foaming member 42 is located on a lower side of the mask 41.

As shown in fig. 24, there are two rail assemblies 50, and the two rail assemblies 50 are respectively disposed at opposite sides of the fixing bracket 10 and the leg rest base 20. The two rail assemblies 50 respectively comprise a first rail 51, a second rail 52 and a third rail 53, the two third rails 53 are respectively installed on two sides of the fixing support 10 and connected through four bolts, the two second rails 52 are respectively installed on two sides of the leg support base 20 and connected through four bolts, and the two first rails 51 are respectively connected with the second rail 52 and the third rail 53 through sliding pairs.

As shown in fig. 2 and 11, the driving mechanism 70 is disposed on the fixed bracket 10, the driving mechanism 70 includes a driving motor 71, a first lead screw 72, a second lead screw 73, a first moving member 74 and a second moving member 75, the driving motor 71 has a first output shaft 711 and a second output shaft 712 which are oppositely disposed, the first lead screw 72 is connected with the first output shaft 711, the second lead screw 73 is connected with the second output shaft 712, the first moving member 74 is sleeved on the first lead screw 72, the second moving member 75 is sleeved on the second lead screw 73, the first moving member 74 is connected with the fixed bracket 10, and the second moving member 75 is connected with the leg rest base 20.

The leg rest mechanism 100 has three motion states of "lift", "extend", and "lift + extend".

When the leg rest mechanism 100 performs lifting movement, as shown in fig. 3 and 4, the lifting mechanism 80 starts to work, the lifting mechanism 80 can enable the fixing support 10 to rotate upwards, meanwhile, the winding drum 31 of the recovery device 30 rotates clockwise, the face sleeve 41 releases the length of the face sleeve 41 required in the lifting movement process at a constant speed under the action of the lifting force, the face sleeve 41 is driven to rotate, so that the face sleeve 41 wound on the winding drum 31 is released, the winding drum 31 can drive the second thrust cap 33 to rotate when rotating, the spring 34 generates elastic deformation and has a counterclockwise trend, the spring 34 can tighten the rest face sleeve 41, the seamless connection between the leg rest mechanism 100 and a seat in the whole movement process is ensured, and the lifting state of the leg rest mechanism 100 is realized.

When the leg rest mechanism 100 performs an extending movement, as shown in fig. 3 and 5, the driving motor 71 starts to operate, the first output shaft 711 and the second output shaft 712 of the driving motor 71 start to rotate, the first output shaft 711 drives the first lead screw 72 to rotate, the first lead screw 72 drives the first moving member 74 to move, the second output shaft 712 drives the second lead screw 73 to rotate, and the second lead screw 73 drives the second moving member 75 to move. The track assembly 50 is driven by the driving mechanism 70 to extend, when the first track 51 is positioned in the third track 53 and the second track 52 extends from the first track 51 to the maximum, the leg support mechanism 100 realizes primary extension, and when the first track 51 extends from the third track 53 to the maximum and the second track 52 extends from the first track 51 to the maximum, the leg support mechanism 100 realizes secondary extension. When leg holds in the palm chassis 20 forward motion, foaming piece 42 extends with face cover 41 together, the reel 31 clockwise rotation of recovery unit 30 this moment, face cover 41 is under the effect of drive power, at the uniform velocity release extend required face cover 41 length in the motion process, face cover 41 drive rotates, thereby make the face cover 41 release of winding on reel 31, can drive second thrust cap 33 rotation when reel 31 rotates, it has the anticlockwise trend to make spring 34 take place elastic deformation, make spring 34 can tighten up remaining face cover 41, guarantee the seamless connection of leg holds in the palm mechanism 100 and seat in the whole motion process, realize the extension state of leg holds in the palm mechanism 100.

When the leg rest mechanism 100 performs the lifting and extending movement, as shown in fig. 6, the lifting mechanism 80 and the driving motor 71 work simultaneously, so as to realize the lifting and extending state of the leg rest mechanism 100, and the control method thereof can refer to the foregoing description, and is not described herein again.

Other constructions and operations of seat assemblies and vehicles according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims

1. A seat assembly comprising a seat having a cushion assembly and a leg rest mechanism, and the leg rest mechanism (100) comprising:

a fixed bracket (10);

a leg rest chassis (20), the leg rest chassis (20) being slidably disposed within the fixed support (10), the leg rest chassis (20) being switchable between a retracted state within the fixed support (10) and an extended state at least partially extending out of the fixed support (10);

a recovery device (30), wherein the recovery device (30) is arranged at the lower side of the fixed support (10), and the recovery device (30) comprises a winding drum (31);

the face sleeve assembly (40), part of the face sleeve assembly (40) wraps the fixed support (10), one end of the face sleeve assembly (40) is fixed, the other end of the face sleeve assembly (40) bypasses the fixed support (10) and the leg support underframe (20) to be connected with the winding drum (31),

wherein the fixed bracket (10) is rotatably arranged at the front end of the seat, one end of the surface sleeve component (40) far away from the winding drum (31) is connected with the cushion component,

the leg rest mechanism (100) further comprises a track assembly (50), the track assembly (50) comprising: a first rail (51), a second rail (52), and a third rail (53), the third rail (53) being connected with the fixed bracket (10), the second rail (52) being connected with the leg rest chassis (20), the first rail (51) and the second rail (52) being slidably connected, the first rail (51) and the third rail (53) being slidably connected,

the leg support mechanism (100) further comprises a support bracket (60) and a driving mechanism (70), the support bracket (60) is slidably connected with the leg support chassis (20) and the fixed bracket (10), when the leg support chassis (20) is in a state of the longest extending length, at least part of the support bracket (60) is positioned between the fixed bracket (10) and the leg support chassis (20) to support the face cover assembly (40), the driving mechanism (70) is arranged on the fixed bracket (10), and the driving mechanism (70) is connected with the leg support chassis (20) to drive the leg support chassis (20) to switch between the retracted state and the extending state;

the drive mechanism (70) includes:

a drive motor (71), the drive motor (71) having a first output shaft (711) and a second output shaft (712) disposed opposite to each other;

a first screw (72) and a second screw (73), the first screw (72) is connected with the first output shaft (711), and the second screw (73) is connected with the second output shaft (712);

the first moving piece (74) is sleeved on the first screw rod (72) and driven to move by the first screw rod (72), the second moving piece (75) is sleeved on the second screw rod (73) and driven to move by the second screw rod (73), the first moving piece (74) is connected with the fixed support (10), and the second moving piece (75) is connected with the leg rest underframe (20);

a gear assembly (76), the gear assembly (76) including a first gearwheel (761), a first pinion (762), a second gearwheel (763) and a second pinion (764), the first pinion (762) being located on the first output shaft (711), the first gearwheel (761) being located on the first lead screw (72), the first gearwheel (761) being engaged with the first pinion (762), the second pinion (764) being located on the second output shaft (712), the second gearwheel (764) being located on the second lead screw (73), the second gearwheel (763) being engaged with the second pinion (764), the drive motor (71) being located between the first lead screw (72) and the second lead screw (73), the drive motor (71), the first lead screw (72) and the second lead screw (73) being arranged side by side.

2. The seat assembly of claim 1, wherein the track assembly (50) is two and is disposed on opposite sides of the fixed bracket (10) and the legrest chassis (20).

3. The seat assembly of claim 1, wherein the facecover assembly (40) comprises:

the dough cover (41), one end of the dough cover (41) is fixed, and the other end of the dough cover (41) is connected with the winding drum (31);

and the foaming piece (42) is stacked with the face cover (41) and is positioned on one side of the face cover (41) facing the fixed support (10).

4. The seat assembly of claim 1, wherein the legrest mechanism (100) further comprises a lifting mechanism (80), the lifting mechanism (80) being connected to the stationary bracket (10) to drive the stationary bracket (10) to rotate.

5. A vehicle comprising a seat assembly according to any one of claims 1 to 4.