Cushion assembly of automobile seat, automobile seat and automobile

Abstract

The embodiment of the invention provides a cushion assembly of an automobile seat, the automobile seat and a vehicle, the cushion assembly is detachably connected with a framework assembly of the automobile seat, and the cushion assembly separated from the framework assembly is unfolded to form a chair. The cushion assembly can be used outside a vehicle and can be conveniently disassembled, assembled and carried by a user.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle seats, and particularly to a seat cushion assembly of a vehicle seat, a vehicle seat and a vehicle. Background Art

[0002] As an essential structure inside a vehicle, vehicle seats are being demanded more and more by users. In related technologies, some vehicle seats are not only limited to being installed inside the vehicle, but can also be removed from the vehicle and carried outside the vehicle for use. However, due to the large size and heavy weight of vehicle seats, it is rather laborious for users to disassemble, assemble and carry vehicle seats. Summary of the Invention

[0003] In view of this, embodiments of the present application are expected to provide a seat cushion assembly, a vehicle seat and a vehicle that can not only be used outside the vehicle, but also facilitate users to disassemble, assemble and carry.

[0004] To achieve the above object, an embodiment of the present application provides a seat cushion assembly of a vehicle seat. The seat cushion assembly is detachably connected to the frame assembly of the vehicle seat, and after being separated from the frame assembly, the seat cushion assembly forms a chair by unfolding.

[0005] In some embodiments, the seat cushion assembly includes a seat cushion body, and the seat cushion body includes a first part and a second part that are rotatably connected. The first part at least includes a first sub-part; the first part and the second part rotate relatively away from each other so that the first sub-part forms the backrest of the chair, and the second part forms the seat of the chair.

[0006] In some embodiments, the first part includes a second sub-part rotatably connected to the first sub-part. After the first part and the second part rotate relatively away from each other, the second sub-part rotates towards the second part relative to the first sub-part to form the armrest of the chair.

[0007] In some embodiments, the second sub-part includes a first section and a second section. One end of the first section in the extending direction is rotatably connected to the first sub-part, and the second section is slidably engaged with the first section and can slide along the extending direction.

[0008] In some embodiments, one of the first section and the second section has a guiding channel, and the other extends into the guiding channel and is slidably engaged with the guiding channel.

[0009] In some embodiments, before the seat cushion assembly unfolds, the first part and the second part of the seat cushion body are folded, and the side of the first part facing away from the second part is the seating surface of the seat cushion assembly; and / or,

[0010] The second part has a storage groove formed by a depression on one side close to the first part. Before the seat cushion assembly is unfolded, the first part and the second part of the seat cushion body are folded, and at least part of the structure of the first part is located in the storage groove.

[0011] In some embodiments, the seat cushion assembly includes a seat cushion body and a plurality of wheel structures disposed on the seat cushion body and having wheels, and the chair moves driven by the wheels of each of the wheel structures.

[0012] In some embodiments, the wheel structure has a storage state in which it is stored in the seat cushion body and a use state in which the chair is moved by the wheels. The wheel structure switches between the storage state and the use state by rotating relative to the seat cushion body.

[0013] In some embodiments, the seat cushion assembly also includes a connecting support arranged on the seat cushion body, and the wheel structure includes a mounting bracket, which is rotatably connected to the connecting support and the wheel respectively, and the mounting bracket rotates relative to the seat cushion body to switch the wheel structure between the storage state and the use state.

[0014] In some embodiments, the wheel structure includes a connecting shaft passing through the wheel and the mounting bracket, the axial direction of the connecting shaft intersects with the rotation axis of the mounting bracket, and the connecting shaft protrudes along the axial direction from the side of the mounting bracket away from the wheel, and when the wheel structure is in the storage state, the portion of the rotation shaft protruding from the mounting bracket abuts against the seat cushion body.

[0015] In some embodiments, the multiple wheel structures include two first wheel structures, the seat cushion assembly includes a driving structure and a power supply structure electrically connected to the driving structure, and the driving structure includes a first driving component that drives the wheels of the two first wheel structures to rotate.

[0016] In some embodiments, the first drive assembly includes a drive motor, a transmission mechanism and a transmission shaft, the transmission shaft is coaxially connected to the two wheels of the first wheel structure, and the transmission mechanism is respectively connected to the drive motor and the transmission shaft.

[0017] In some embodiments, the transmission mechanism includes a first transmission wheel, a second transmission wheel and a transmission belt, the first transmission wheel is arranged on the driving shaft of the driving motor, the second transmission wheel is arranged on the transmission shaft, and the transmission belt is wound around the first transmission wheel and the second transmission wheel.

[0018] In some embodiments, the drive shaft is detachably connected to the wheels of the two first wheel structures respectively. Each first wheel structure has a storage state where it is received in the seat body and a use state where the chair is moved by the wheels. When the wheels of the two first wheel structures are in a state of being separated from the drive shaft, each first wheel structure rotates relative to the seat body to switch between the storage state and the use state.

[0019] In some embodiments, the two first wheel structures rotate in a direction approaching each other to switch from the use state to the storage state; and / or,

[0020] The seat assembly further includes elastic telescopic members corresponding to the first wheel structures one by one. The opposite ends of each elastic telescopic member in the telescopic direction are respectively connected to the corresponding first wheel structure and the seat body, so that the corresponding first wheel structure has a tendency to rotate in a direction approaching the other first wheel structure under the elastic force of the elastic telescopic member.

[0021] In some embodiments, the seat assembly further includes a cage rotatably connected to the seat body, and the drive shaft is disposed in the cage.

[0022] In some embodiments, the seat body has a receiving groove formed by depression, and the receiving groove receives the cage and the drive shaft separated from the wheels of the two first wheel structures.

[0023] In some embodiments, the plurality of wheel structures include two second wheel structures. The seat assembly includes a drive structure and a power supply structure electrically connected to the drive structure. The drive structure includes a second drive assembly for driving the two second wheel structures to turn.

[0024] In some embodiments, the seat assembly includes two connecting supports rotatably connected to the seat body. The connecting supports are respectively connected to the second wheel structures one by one. The second drive assembly drives the two connecting supports to rotate relative to the seat body, so that the two connecting supports respectively drive the corresponding second wheel structures to turn.

[0025] In some embodiments, the second drive assembly includes a steering motor, a first steering member, and a second steering member rotatably connected to the two connecting supports. The first steering member is connected to the drive shaft of the steering motor and is rotatably connected to a portion of the second steering member located between the two connecting supports.

[0026] In some embodiments, the seat cushion body has a first accommodation cavity and an opening communicating the first accommodation cavity with the outside. The steering motor is disposed in the first accommodation cavity, and a drive shaft of the steering motor is connected to the first steering member through the opening.

[0027] In some embodiments, the seat cushion body has a second accommodation cavity, and the power supply structure is disposed in the second accommodation cavity; and / or,

[0028] The seat cushion assembly includes a control assembly, and the control assembly is electrically connected to the power supply structure and the drive structure.

[0029] Another embodiment of the present application provides an automotive seat, including:

[0030] A frame assembly;

[0031] The seat cushion assembly as described above, and the seat cushion assembly is detachably connected to the frame assembly.

[0032] In some embodiments, the frame assembly includes a backrest assembly and two spaced-apart seat components. In the connected state, the seat cushion assembly is located between the two seat components.

[0033] Another embodiment of the present application provides a vehicle, including the automotive seat as described above.

[0034] The embodiments of the present application provide a seat cushion assembly, an automotive seat, and a vehicle. The seat cushion assembly of the embodiments of the present application is detachably connected to the frame assembly. When the seat cushion assembly is connected to the frame assembly, it can be used as the seat cushion of the automotive seat. When the seat cushion assembly is separated from the frame assembly, the seat cushion assembly forms an independently usable chair by unfolding. That is to say, only the seat cushion assembly part of the automotive seat is removed and used in the embodiments of the present application, while the frame assembly remains in the vehicle. Compared with the entire automotive seat, the seat cushion assembly is lighter in weight and smaller in volume. Therefore, the solution of only removing the seat cushion assembly from the frame assembly in the embodiments of the present application is not only convenient for users to disassemble and assemble, but also convenient for users to carry the seat cushion assembly out of the vehicle for use. Thus, compared with the solution of removing the entire automotive seat from the vehicle in the related art, the seat cushion assembly of the embodiments of the present application can be used outside the vehicle and is also convenient for users to disassemble, assemble, and carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic structural view of an automotive seat according to an embodiment of the present application;

[0036] Figure 2 is a schematic structural view of the automotive seat from another perspective according to an embodiment of the present application;

[0037] Figure 3 isFigure 1 Exploded view of the car seat shown;

[0038] Figure 4 For Figure 1 Exploded view of the seat cushion assembly shown;

[0039] Figure 5 For Figure 1 Schematic structural diagram of the chair formed by the unfolding of the seat cushion assembly shown;

[0040] Figure 6 For Figure 5 Schematic structural diagram of the chair from another perspective shown;

[0041] Figure 7 For Figure 5 Schematic structural diagram of the chair from yet another perspective shown;

[0042] Figure 8 For Figure 7 Cross-sectional view at A-A in , where the first wheel structure in the figure is in use;

[0043] Figure 9 For Figure 7 Cross-sectional view at A-A in , where the first wheel structure in the figure is in the stowed state, and the transmission mechanism and the transmission shaft are omitted;

[0044] Figure 10 For Figure 7 Cross-sectional view at A-A in , where the first wheel structure in the figure is in use, and the transmission mechanism and the transmission shaft are omitted;

[0045] Figure 11 For Figure 1 Schematic structural diagram of the seat cushion assembly shown, where the first wheel structure in the figure is in the stowed state;

[0046] Figure 12 For Figure 1 Schematic structural diagram of the seat cushion assembly shown, where the first wheel structure in the figure is in use;

[0047] Figure 13 For Figure 7 Cross-sectional view at B-B in , where the transmission shaft in the figure is received in the receiving groove;

[0048] Figure 14 For Figure 7 Cross-sectional view at B-B in , where the transmission shaft in the figure is not received in the receiving groove;

[0049] Figure 15 For Figure 1 Schematic structural diagram of the seat cushion assembly shown, where the transmission shaft in the figure is received in the receiving groove;

[0050] Figure 16 is Figure 1 a schematic structural diagram of the seat cushion assembly shown, where the first wheel structure in the figure is connected to the transmission shaft;

[0051] Figure 17 is Figure 7 a schematic structural diagram at the C-C position in [reference], where the second wheel structure in the figure is in a retracted state and the second drive assembly is omitted;

[0052] Figure 18 is Figure 7 a schematic structural diagram at the C-C position in [reference], where the second wheel structure in the figure is in a use state;

[0053] Figure 19 is Figure 1 a schematic structural diagram of the seat cushion assembly in [reference], where the second wheel structure in the figure is in a retracted state;

[0054] Figure 20 is Figure 1 a schematic structural diagram of the seat cushion assembly in [reference], where the second wheel structure in the figure is in a use state;

[0055] Figure 21 is Figure 1 a schematic structural diagram of the seat cushion body in [reference];

[0056] Figure 22 is Figure 8 a schematic structural diagram of the drive motor and the first transmission wheel in [reference];

[0057] Figure 23 is Figure 8 a schematic structural diagram of the mounting bracket in [reference];

[0058] Figure 24 is Figure 19 a schematic structural diagram of the connecting support in [reference];

[0059] Figure 25 is Figure 20 a schematic structural diagram of the steering motor and the first steering member in [reference];

[0060] Figure 26 is Figure 5 a control schematic diagram of the control component in [reference].

[0061] Explanation of reference numerals:

[0062] 10. Seat cushion assembly; 11. Seat cushion body; 11a. Receiving groove; 11b. First receiving cavity; 11c. Opening; 11d. Second receiving cavity; 11e. Third receiving cavity; 11f. Third mating hole; 111. First part; 1111. First sub - part; 1112. Second sub - part; 11121. First section; 11122. Second section; 1113. Hinge pin; 1114. Stop structure; 112. Second part; 112a. Storage groove; 112b. Second seat surface; 112c. Pin hole; 12. Wheel structure; 121. Wheel; 121a. Second mating hole; 122. Mounting bracket; 122a. First mating hole; 1221. Bracket body; 1222. Mounting shaft; 123. Connecting shaft; 124. First wheel structure; 125. Second wheel structure; 126. Bearing; 13. Connecting support; 131. Support body; 1311. First connecting part; 132. Rotating shaft; 133. First limiting part; 134. Second limiting part; 135. Second connecting part; 14. Driving structure; 141. First driving assembly; 1411. Driving motor; 1412. Transmission mechanism; 14121. First transmission wheel; 14122. Second transmission wheel; 14123. Transmission belt; 1413. Transmission shaft; 142. Second driving assembly; 1421. Steering motor; 1422. First steering part; 1423. Second steering part; 15. Power supply structure; 16. Cage; 17. Elastic telescopic part; 18. Control component; 20. Frame assembly; 21. Backrest assembly; 22. Seat assembly; 30. Support frame. Detailed implementation manners

[0063] An embodiment of the present application provides an automotive seat. Please refer to Figures 1 to 25 , the automotive seat includes a seat cushion assembly 10 and a frame assembly 20.

[0064] Please refer to Figures 1 to 25 , the seat cushion assembly 10 of the embodiment of the present application is detachably connected to the frame assembly 20 of the automotive seat, and the seat cushion assembly 10 separated from the frame assembly 20 forms a chair by unfolding.

[0065] That is to say, the seat cushion assembly 10 has two usage states. One is connected to the frame assembly 20 to form an integral whole for use as a normal automotive seat. At this time, the seat cushion assembly 10 is the seat cushion of the automotive seat. Another usage state of the seat cushion assembly 10 is separated from the frame assembly 20 and forms an independently usable chair by unfolding. This chair can be separated from the vehicle's driving and riding space, thereby broadening the usage scenarios of the automotive seat.

[0066] The connection manner between the seat cushion assembly 10 and the frame assembly 20 is not limited. Exemplarily, the seat cushion assembly 10 can be directly placed on the frame assembly 20, so that the seat cushion assembly 10 can be directly separated from the frame assembly 20 without the aid of external tools, which is convenient for users to use. In some other embodiments, corresponding connection structures can also be provided for the seat cushion assembly 10 and the frame assembly 20, and the two are connected through the connection structures.

[0067] Please continue to refer to Figures 1 to 3 , the frame assembly 20 can include a backrest assembly 21 and two spaced-apart seat assemblies 22. In the connected state, the seat cushion assembly 10 is located between the two seat assemblies 22. The two seat assemblies 22 can position the installation position of the seat cushion assembly 10.

[0068] Exemplarily, please refer to Figure 1 and Figure 2 , the vehicle seat can further include a support frame 30 provided on the frame assembly 20, and the vehicle seat is connected to the vehicle body floor through the support frame 30.

[0069] The embodiment of the present application also provides a vehicle, which includes the vehicle seat provided in any embodiment of the present application.

[0070] In the related art, for vehicle seats that can be used outside the vehicle, the entire vehicle seat is removed from the vehicle. However, due to the large size and heavy weight of the vehicle seat, it is relatively laborious for users to disassemble, assemble and carry the vehicle seat.

[0071] The seat cushion assembly 10 of the embodiment of the present application is detachably connected to the frame assembly 20. When the seat cushion assembly 10 is connected to the frame assembly 20, it can be used as the seat cushion of the vehicle seat. When the seat cushion assembly 10 is separated from the frame assembly 20, the seat cushion assembly 10 forms an independently usable chair through unfolding. That is to say, only the seat cushion assembly 10 on the vehicle seat is removed in the embodiment of the present application, and the frame assembly 20 remains in the vehicle. Compared with the entire vehicle seat, the seat cushion assembly 10 is lighter in weight and smaller in volume. Therefore, the solution of only removing the seat cushion assembly 10 from the frame assembly 20 in the embodiment of the present application is not only convenient for users to disassemble and assemble, but also convenient for users to carry the seat cushion assembly 10 outside the vehicle relatively easily. It can be seen that compared with the solution of removing the entire vehicle seat from the vehicle in the related art, the seat cushion assembly 10 of the embodiment of the present application can be used outside the vehicle and is also convenient for users to disassemble, assemble and carry.

[0072] In some embodiments, please refer to Figures 1 to 6, the seat cushion assembly 10 includes a seat cushion body 11, and the seat cushion body 11 may include a first part 111 and a second part 112 that are rotatably connected. The first part 111 at least includes a first sub - part 1111. The first part 111 and the second part 112 rotate relatively in a direction away from each other, so that the first sub - part 1111 forms the backrest of the chair, and the second part 112 forms the seat of the chair.

[0073] That is to say, the first part 111 and the second part 112 rotate relatively in a direction away from each other to form a certain included angle. This unfolding method is simple, easy to operate, and provides a better user experience.

[0074] The first sub - part 1111 forms the backrest of the chair, and the second part 112 forms the seat of the chair. That is to say, the side of the first sub - part 1111 close to the second part 112 has a leaning surface 111b for the user to lean on, and the side of the second part 112 close to the first sub - part 1111 has a second seating surface 112b for the user to sit on.

[0075] To improve the comfort of the chair, the first part 111 and the second part 112 may include a soft - covering layer. That is to say, the first part 111 and the second part 112 at least have sponge foam and a cover in the area in contact with the user.

[0076] Exemplarily, please refer to Figure 13 , from one end close to the rotation axis of the second part 112 to the other end far from the rotation axis of the second part 112, the second seating surface 112b is inclined upward relative to the horizontal plane. That is to say, the second seating surface 112b has an inclined posture with the front higher than the rear. Here, "front" refers to the end close to the rotation axis of the second part 112, and "rear" refers to the end away from the rotation axis of the second part 112. This structure can ensure the comfort of the user when sitting and will not cause the problem of the human body slipping forward.

[0077] Exemplarily, please refer to Figure 4 , the first part 111 has hinge pins 1113 on opposite sides of the first sub - part 1111, and the second part 112 has pin holes 112c that cooperate with the hinge pins. The hinge pins 1113 can rotate in the pin holes 112c, thereby realizing the rotational connection between the first part 111 and the second part 112.

[0078] In some other embodiments, it may also be that the opposite sides of the first part 111 have hinge pins, and the first sub - part 1111 has pin holes that cooperate with the hinge pins.

[0079] Exemplarily, please refer to Figure 4 and Figure 11, the first part 111 includes a stop structure 1114 disposed on the first sub - part 1111. When the seat cushion assembly 10 forms a chair through unfolding, the stop structure 1114 abuts against the first part 111, preventing the first part 111 from rotating away from the second part 112 under the acting force when the user leans against the backrest.

[0080] Exemplarily, please refer to Figures 3 to 6 , the first part 111 may include a second sub - part 1112 rotatably connected to the first sub - part 1111. After the first part 111 and the second part 112 rotate relatively away from each other, the second sub - part 1112 rotates towards the second part 112 relative to the first sub - part 1111 to form the armrest of the chair.

[0081] It can be understood that when the second sub - part 1112 forms the armrest of the chair, there is a space between the armrest and the seat in the height direction, that is to say, there is a space between the second sub - part 1112 and the second part 112 in the height direction.

[0082] Figures 3 to 6 The shown first part 111 includes two second sub - parts 1112, which are respectively disposed on opposite sides of the first sub - part 1111.

[0083] Please refer to Figure 5 and Figure 6 , the second sub - part 1112 may include a first section 11121 and a second section 11122. One end of the first section 11121 along the extension direction is rotatably connected to the first sub - part 1111, and the second section 11122 is in sliding fit with the first section 11121 and can slide along the extension direction. That is to say, the second section 11122 can slide away from the first sub - part 1111 relative to the first section 11121 to extend the length of the second sub - part 1112, thereby improving the user experience.

[0084] Exemplarily, the first section 11121 has a guiding channel (not shown in the figure), and the second section 11122 extends into the guiding channel and is in sliding fit with the guiding channel. The first section 11121 can at least play a certain role in shielding the second section 11122. Thus, it can not only make the appearance of the second sub - part 1112 more beautiful but also play a certain protective role for the second section 11122.

[0085] In some other embodiments, it may also be that the second section 11122 has a guiding channel and the first section 11121 extends into the guiding channel.

[0086] In some embodiments, please refer to Figure 1, before the seat cushion assembly 10 is unfolded, the first part 111 of the seat cushion body 11 can be folded with the second part 112, and the side of the first part 111 facing away from the second part 112 is the first seating surface 111a of the seat cushion assembly 10, that is, the surface for the user to sit on when the seat cushion assembly 10 is used as the seat cushion of an automobile seat.

[0087] Folding means that the first part 111 and the second part 112 rotate towards each other until at least part of the leaning surface 111b of the first part 111 contacts the second seating surface 112b of the second part 112. At this time, the seat cushion assembly 10 can be detachably connected to the frame assembly 20.

[0088] In some embodiments, please refer to Figure 4 and Figure 5 , a receiving groove 112a formed by a depression may be provided on the side of the second part 112 close to the first part 111. Before the seat cushion assembly 10 is unfolded, the first part 111 of the seat cushion body 11 is folded with the second part 112, and at least part of the structure of the first part 111 is located in the receiving groove 112a.

[0089] The receiving groove 112a is used to receive at least part of the structure of the first part 111, so as to reduce the space occupied by the seat cushion assembly 10 when the first part 111 and the second part 112 are folded.

[0090] It can be understood that the second seating surface 112b of the second part 112 is the groove wall of the receiving groove 112a.

[0091] In some embodiments, please refer to Figure 2 , Figures 5 to 20 , the seat cushion assembly 10 may include a seat cushion body 11 and a plurality of wheel structures 12 provided on the seat cushion body 11 and having wheels 121. The chair moves driven by the wheels 121 of each wheel structure 12.

[0092] That is to say, after the seat cushion assembly 10 is unfolded to form a chair, the wheel structure 12 can not only play a supporting role, but also facilitate the movement of the chair, so as to realize the short-distance transportation function of the chair, expand the use scenario of the user, and meet more diverse user needs.

[0093] In some other embodiments, the seat cushion assembly 10 may not have the wheel structure 12, but instead be provided with support legs for supporting the seat cushion body 11. That is to say, after the seat cushion assembly 10 is unfolded to form a chair, the support legs only have a supporting function and do not have a displacement function.

[0094] Exemplarily, please refer to Figure 2 , Figures 5 to 20, the wheel structure 12 can have a stored state where it is received in the seat cushion body 11 and a use state where the chair is moved by the wheels 121. The wheel structure 12 rotates relative to the seat cushion body 11 to switch between the stored state and the use state.

[0095] When the wheel structure 12 is in the stored state, it is convenient to connect the seat cushion assembly 10 to the frame assembly 20, thereby reducing the space occupied by the seat cushion assembly 10 in the vehicle. When the user needs to use the chair, only by rotating the wheel structure 12 relative to the body, it can be switched from the stored state to the use state, with simple operation and convenient for the user to use.

[0096] Exemplarily, please refer to Figures 6 to 20 , Figure 23 and Figure 24 , the seat cushion assembly 10 may further include a connection support 13 provided on the seat cushion body 11. The wheel structure 12 includes a mounting bracket 122. The mounting bracket 122 is rotatably connected to the connection support 13 and the wheel 121 respectively. The mounting bracket 122 rotates relative to the seat cushion body 11 to switch the wheel structure 12 between the stored state and the use state.

[0097] The connection support 13 is used to mount the mounting bracket 122. By rotatably connecting the mounting bracket 122 to the connection support 13, the mounting bracket 122 can rotate relative to the seat cushion body 11. That is to say, the purpose of rotatably connecting the mounting bracket 122 to the connection support 13 is to achieve the rotation of the mounting bracket 122 relative to the seat cushion body 11, and the purpose of rotatably connecting the mounting bracket 122 to the wheel 121 is to make the wheel 121 rotate relative to the mounting bracket 122, so that the wheel 121 drives the chair to move. In some other embodiments, the connection support 13 may not be provided, and the mounting bracket 122 may be directly rotatably connected to the seat cushion body 11.

[0098] The structure of the mounting bracket 122 is not limited. Exemplarily, please refer to Figure 23 , the mounting bracket 122 includes a bracket body 1221 and a mounting shaft 1222 provided at one end of the bracket body 1221. Opposite ends of the mounting shaft 1222 protrude from the bracket body 1221 in the axial direction, and the protruding parts from the bracket body 1221 are rotatably connected to the connection support 13.

[0099] The connection method between the mounting bracket 122 and the wheel 121 is not limited. Exemplarily, please refer to Figure 6 , Figures 8 to 12 , Figures 16 to 20 , the wheel structure 12 may include a connection shaft 123 passing through the wheel 121 and the mounting bracket 122. That is to say, the mounting bracket 122 and the wheel 121 are rotatably connected by the connection shaft 123.

[0100] Please refer toFigure 8 , Figure 18 and Figure 23 , the mounting bracket 122 has a first mating hole 122a, the wheel 121 has a second mating hole 121a, and the connecting shaft 123 passes through the first mating hole 122a and the second mating hole 121a. Among them, the connecting shaft 123 can rotate within the first mating hole 122a and is in interference fit with the second mating hole 121a, so as to ensure that the wheel 121 can rotate relative to the mounting bracket 122.

[0101] Preferably, referring to Figure 8 , Figure 9 and Figure 17 , the wheel structure 12 may further include a bearing 126 provided on the connecting shaft 123. The bearing 126 is located within the first mating hole 122a. Among them, the inner ring of the bearing 126 is in interference fit with the connecting shaft 123, and the outer ring of the bearing 126 is in interference fit with the first mating hole 122a. Thus, not only can the wheel 121 rotate smoothly and efficiently, but also the connection stability between the wheel 121 and the mounting bracket 122 can be ensured.

[0102] Exemplarily, the axial direction of the connecting shaft 123 may intersect with the rotation axis of the mounting bracket 122. That is to say, the rotation axis of the wheel 121 intersects with the rotation axis of the mounting bracket 122, and the mounting bracket 122 rotates towards the opposite side of the wheel 121 along the axial direction to reduce the space occupied by the wheel structure 12 in the retracted state.

[0103] Please continue to refer to Figures 8 to 10 , Figure 17 and Figure 18 , the connecting shaft 123 protrudes axially from the side of the mounting bracket 122 facing away from the wheel 121. When the wheel structure 12 is in the retracted state, the part of the rotating shaft protruding from the mounting bracket 122 abuts against the seat cushion body 11. That is to say, when the wheel structure 12 is switched from the use state to the retracted state, the mounting bracket 122 rotates towards the side away from the wheel 121 until the rotating shaft abuts against the seat cushion body 11, and the abutment of the rotating shaft against the seat cushion body 11 can limit the rotation angle of the mounting bracket 122.

[0104] In some embodiments, Figures 7 to 12 , a plurality of wheel structures 12 may include two first wheel structures 124. The seat cushion assembly 10 includes a drive structure 14 and a power supply structure 15 electrically connected to the drive structure 14. The drive structure 14 includes a first drive assembly 141 for driving the wheels 121 of the two first wheel structures 124 to rotate.

[0105] The first drive assembly 141 is used to drive the wheels 121 of the two first wheel structures 12 to rotate, so as to realize the movement of the seat cushion body 11.

[0106] Electrical connection means that the power supply structure 15 and the drive structure 14 are connected by wires or conductor lines, so that the power supply structure 15 supplies power to the drive structure 14.

[0107] The type of the power supply structure 15 is not limited. Exemplarily, the power supply structure 15 can be a battery such as a lithium battery. For example, a 12V low-voltage lithium battery on a vehicle can be used, and users can also purchase spare batteries of the same specification for installation by themselves. Lithium batteries are easy to disassemble and assemble, small in volume and light in weight, which is convenient for users to disassemble, assemble and carry.

[0108] Exemplarily, please refer to Figure 7 、 Figure 11 、 Figure 12 、 Figure 15 、 Figure 16 、 Figure 20 and Figure 21 , the seat cushion body 11 can have a second accommodation cavity 11d, and the power supply structure 15 is arranged in the second accommodation cavity 11d to prevent the power supply structure 15 from being damaged by external objects.

[0109] Exemplarily, the seat cushion assembly 10 can also include positive and negative contact terminals arranged in the second accommodation cavity 11d and wires respectively communicating with the positive and negative contact terminals. When the power supply structure 15 is a battery, the positive and negative electrode posts of the battery can be respectively connected and conducted with the positive and negative contact terminals, so as to realize power supply.

[0110] The structure of the first driving component 141 is not limited. Exemplarily, please refer to Figure 7 、 Figure 8 、 Figures 13 to 16 、 Figure 22 , the first driving component 141 can include a driving motor 1411, a transmission mechanism 1412 and a transmission shaft 1413. The transmission shaft 1413 is coaxially connected with the wheels 121 of the two first wheel structures 12, and the transmission mechanism 1412 is respectively in transmission connection with the driving motor 1411 and the transmission shaft 1413.

[0111] The driving motor 1411 is used to provide power, and the transmission mechanism 1412 and the transmission shaft 1413 are used to transmit the power of the driving motor 1411 to the wheels 121 of the two first wheel structures 12, so as to realize the rotation of the wheels 121. Specifically, the power of the driving motor 1411 is transmitted to the transmission shaft 1413 through the transmission mechanism 1412, so that the transmission shaft 1413 rotates relatively. Since the transmission shaft 1413 is coaxially connected with the wheels 121 of the two first wheel structures 12, the transmission shaft 1413 can drive the two wheels 121 to rotate simultaneously.

[0112] Exemplarily, please refer to Figure 8 、 Figures 13 to 16, the drive shaft 1413 can be detachably connected to the wheels 121 of the two first wheel structures 12 respectively. Each first wheel structure 12 has a storage state where it is stored in the seat body 11 and a use state where the chair is moved by the wheels 121. When the wheels 121 of the two first wheel structures 12 are in a state of being separated from the drive shaft 1413, each first wheel structure 12 rotates relative to the seat body 11 to switch between the storage state and the use state.

[0113] Detachably connected means that the drive shaft 1413 and the wheels 121 of the two first wheel structures 12 can be connected to form a whole to drive the wheels 121 to rotate, and the drive shaft 1413 can also be separated from the wheels 121 to facilitate the switching of the first wheel structure 12 from the use state to the storage state.

[0114] It should be noted that the detachable connection between the drive shaft 1413 and the wheels 121 includes both the direct detachable connection between the drive shaft 1413 and the wheels 121 and the indirect detachable connection between the drive shaft 1413 and the wheels 121 through other components. For example, the drive shaft 1413 can pass through the mounting bracket 122 and the wheels 121 and be detachably connected to the wheels 121. In some other embodiments, please refer to Figure 8 , the drive shaft 1413 can be detachably connected to the part of the connecting shaft 123 protruding from the mounting bracket 122, so that the drive shaft 1413 drives the corresponding wheels 121 to rotate through the connecting shaft 123, and at the same time, it is also convenient for the drive shaft 1413 to be separated from the wheels 121.

[0115] Exemplarily, please refer to Figure 8 , the drive shaft 1413 can have a transmission hole (not shown in the figure) that cooperates with the connecting shaft 123. A part of the structure of the connecting shaft 123 extends into the transmission hole, and the connecting shaft 123 and the drive shaft 1413 are in a non-rotating fit, that is, there is no relative rotation between the connecting shaft 123 and the drive shaft 1413 to achieve efficient and accurate transmission between the drive shaft 1413 and the connecting shaft 123.

[0116] The form of the non-rotating fit between the drive shaft 1413 and the connecting shaft 123 is not limited. Exemplarily, the wheel structure 12 can also include a limiting block. The part of the connecting shaft 123 protruding from the mounting bracket 122 has a first limiting groove formed by a depression, and the transmission hole of the drive shaft 1413 has a corresponding second limiting groove. The limiting block is located in both the first limiting groove and the second limiting groove at the same time, so as to achieve the non-rotating fit between the drive shaft 1413 and the connecting shaft 123.

[0117] In another embodiment, the shape of the transmission hole of the transmission shaft 1413 along the cross-section perpendicular to the axial direction is polygonal, and the outer shape of the protruding part of the connecting shaft 123 from the mounting bracket 122 matches the transmission hole, thereby realizing the anti-rotation fit between the transmission shaft 1413 and the connecting shaft 123.

[0118] In one embodiment, please refer to Figure 9 and Figure 11 , the two first wheel structures 12 can be rotated in the direction of approaching each other to switch from the use state to the storage state. Thus, it can be ensured that when the two first wheel structures 12 are in the storage state, in the projection plane perpendicular to the height direction of the seat cushion assembly 10 (i.e., the height direction of the chair), the projections of the two first wheel structures 12 are located within the projection of the seat cushion body 11, reducing the space occupied by the seat cushion assembly 10 when used as the seat cushion of an automobile seat, and at the same time facilitating the connection between the seat cushion assembly 10 and the skeleton assembly 20.

[0119] In one embodiment, please refer to Figure 6 , Figure 8 , Figure 10 and Figure 12 , the seat cushion assembly 10 may further include elastic telescopic members 17 corresponding to the first wheel structures 124 one by one. The opposite ends of the elastic telescopic member 17 along the telescopic direction are respectively connected to the corresponding first wheel structure 124 and the seat cushion body 11, so that the corresponding first wheel structure 124 has a tendency to rotate in the direction of approaching another first wheel structure 124 under the elastic force of the elastic telescopic member 17. That is to say, when the elastic telescopic member 17 is respectively connected to the first wheel structure 124 and the seat cushion body 11, the elastic telescopic member 17 is in a stretched state, and the elastic telescopic member 17 exerts a certain pulling force on the corresponding first wheel structure 124, so that the first wheel structure 124 has a tendency to rotate in the direction of approaching another first wheel structure 124. Since the two first wheel structures 124 are connected to the transmission shaft 1413, the two first wheel structures 124 can be kept in balance. It can be understood that the elastic telescopic member 17 can prevent the wheel 121 of the corresponding first wheel structure 124 from rotating in the direction away from another first wheel structure 124 when rotating, so as to cause the separation of the first wheel structure 124 from the transmission shaft 1413.

[0120] In one embodiment, please refer to Figure 8 , Figure 15 and Figure 16 , the seat cushion assembly 10 may further include a cage 16 rotatably connected to the seat cushion body 11, and the transmission shaft 1413 is disposed in the cage 16.

[0121] The cage 16 is used to mount the transmission shaft 1413 to further ensure the transmission stability between the transmission shaft 1413 and the transmission mechanism 1412.

[0122] The cage 16 is rotatably connected to the seat cushion body 11. That is to say, the cage 16 can drive the transmission shaft 1413 to rotate, so that when each first wheel structure 12 rotates relative to the seat cushion body 11, the transmission shaft 1413 can avoid the two first wheel structures 12.

[0123] The connection manner between the cage 16 and the transmission shaft 1413 is not limited. Exemplarily, please refer to Figure 8 , the transmission shaft 1413 can pass through the cage 16 and transmit relative to the cage 16.

[0124] The number of cages 16 is not limited. Exemplarily, the number of cages 16 can be two, so that the transmission shaft 1413 has good stability during rotation. In some other embodiments, the number of cages 16 can also be one or more than two.

[0125] Please refer to Figures 7 to 16 , the seat cushion body 11 can have a receiving groove 11a formed by recessing, and the receiving groove 11a houses the cage 16 and the transmission shaft 1413 separated from the wheels 121 of the two first wheel structures 12. Thus, not only can the structure of the seat cushion assembly 10 be made more compact, but also it is convenient for the first wheel structure 12 to switch between the use state and the storage state.

[0126] Before switching the first wheel structure 12 from the use state to the storage state, the transmission shaft 1413 can be separated from the wheels 121 of the two first wheel structures 12 first, and then the cage 16 can be rotated towards the direction close to the seat cushion body 11 to drive the transmission shaft 1413 to be jointly received into the receiving groove 11a. After the transmission shaft 1413 and the cage 16 are received into the receiving groove 11a, the first wheel structure 12 is rotated relative to the seat cushion body 11.

[0127] Figure 15 As shown, after the transmission shaft 1413 is received into the receiving groove 11a, there are still some structures located in the second receiving cavity 11d. That is to say, before receiving the transmission shaft 1413, the power supply structure

[0128] More preferably, please refer to Figures 13 to 16 , at least part of the structure of the transmission mechanism 1412 can also be located in the receiving groove 11a, so as to further reduce the space occupied by the seat cushion assembly 10 when used as the seat cushion of an automobile seat.

[0129] In some embodiments, please refer to Figure 8 、 Figures 13 to 16, the transmission mechanism 1412 may include a first transmission wheel 14121, a second transmission wheel 14122, and a transmission belt 14123. The first transmission wheel 14121 is disposed on the drive shaft of the drive motor 1411, the second transmission wheel 14122 is disposed on the transmission shaft 1413, and the transmission belt 14123 is wound around the first transmission wheel 14121 and the second transmission wheel 14122. That is to say, the first transmission wheel 14121 and the second transmission wheel 14122 are driven by the transmission belt 14123. The drive motor 1411 drives the first transmission wheel 14121 to rotate. When the first transmission wheel 14121 rotates, it drives the transmission belt 14123 to rotate, thereby driving the second transmission wheel 14122 to rotate. The structure of this transmission mechanism 1412 is simple, with high transmission efficiency and low maintenance cost.

[0130] In some other embodiments, the transmission mechanism 1412 may not be provided with a conveyor belt, and the first transmission wheel 14121 and the second transmission wheel 14122 are in meshing transmission or friction transmission.

[0131] For the embodiment in which the transmission shaft 1413 is disposed in the cage 16, the cage 16 can limit the positional relationship between the first transmission wheel 14121 and the second transmission wheel 14122, so that a fixed distance is always maintained between the first transmission wheel 14121 and the second transmission wheel 14122, thereby ensuring the installation stability of the transmission mechanism 1412.

[0132] The first transmission wheel 14121 may be rigidly connected to the drive shaft of the drive motor 1411. That is to say, there is almost no relative rotation between the first transmission wheel 14121 and the drive shaft of the drive motor 1411 to ensure the transmission stability of the first transmission wheel 14121. Similarly, the second rotating wheel may be rigidly connected to the transmission shaft 1413.

[0133] The types of the first transmission wheel 14121 and the second transmission wheel 14122 are not limited. Exemplarily, the first transmission wheel 14121 and the second transmission wheel 14122 may be gears, and the transmission belt 14123 is a chain. In some other embodiments, the first transmission wheel 14121 and the second transmission wheel 14122 may be belt pulleys, and the transmission belt 14123 is a flexible belt.

[0134] Please refer to Figures 13 to 15 , the diameter of the first transmission wheel 14121 may be smaller than the diameter of the second transmission wheel 14122 to reduce the output speed of the drive motor 1411 and increase the traction force of the drive motor 1411. In some other embodiments, the diameter of the first transmission wheel 14121 may also be greater than or equal to the diameter of the second drive wheel.

[0135] Exemplarily, please refer to Figure 8, the seat cushion body 11 has a third accommodation cavity 11e, and the driving motor 1411 is arranged in the third accommodation cavity 11e to prevent external objects from affecting the operation of the driving motor 1411.

[0136] Figure 13 and Figure 14 As shown in the figure, the first transmission wheel 14121 is located in the accommodation groove 11a. The seat cushion body 11 may have a communication hole (not shown in the figure) that communicates the accommodation groove 11a and the third accommodation cavity 11e. The driving connection passes through the communication hole and is connected to the first transmission wheel 14121, so that the structure of the seat cushion body 11 is more compact.

[0137] In some embodiments, please refer to Figure 8 , Figures 17 to 20 , the plurality of wheel structures 12 may include two second wheel structures 125. The seat cushion assembly 10 includes a driving structure 14 and a power supply structure 15 electrically connected to the driving structure 14. The driving structure 14 includes a second driving assembly 142 for driving the two second wheel structures 125 to turn.

[0138] The second driving assembly 142 is used to drive the wheels 121 of the two second wheel structures 125 to turn.

[0139] It should be noted that the rotation of the wheel 121 refers to the rotational movement of the wheel 121 around its own rotation axis. The rotation of the wheel 121 can realize the forward (i.e., the forward direction) or reverse (the direction opposite to the forward direction) movement of the chair. The steering of the wheel 121 refers to the adjustment of the moving direction of the chair by changing the angle of the wheel 121, including but not limited to lateral steering, diagonal steering, and in-situ steering, etc. That is to say, the wheels 121 of the two second wheel structures 125 can not only move the chair by rotation, but also turn relative to the chair, thereby changing the forward direction of the chair.

[0140] Exemplarily, please refer to Figures 17 to 20 , Figure 24 , the seat cushion assembly 10 may include two connection supports 13 rotatably connected to the seat cushion body 11. The connection supports 13 are connected to the second wheel structures 12 one by one. The second driving assembly 142 drives the two connection supports 13 to rotate relative to the seat cushion body 11, so that the two connection supports 13 respectively drive the corresponding second wheel structures 12 to turn.

[0141] The second driving assembly 142 is used to drive the connection supports 13 to rotate, thereby respectively driving the corresponding second wheel structures 12 to turn, so as to realize the automatic steering of the chair without manual rotation.

[0142] It should be noted that the connection support 13 may also be rigidly connected to the seat cushion body 11. That is to say, the connection support 13 does not rotate relative to the seat cushion body 11. For example, please refer toFigures 8 to 12 When the connecting support 13 is connected to the first wheel structure 12 , the connecting support 13 is rigidly connected to the cushion body 11 .

[0143] The structure of the connecting support 13 is not limited, for example, please refer to Figure 19 , Figure 20 , Figure 21 and Figure 24 The connecting support 13 includes a support body 131 connected to the second wheel structure 12 and a rotating shaft 132 arranged on the support body 131. The cushion body 11 has a third matching hole 11f matching with the rotating shaft 132. The rotating shaft 132 rotates in the third matching hole 11f, thereby realizing the rotational connection between the connecting support 13 and the cushion body 11.

[0144] See also Figure 24 The support body 131 includes two first connecting parts 1311 arranged at intervals, and partial structures of the two second wheel structures 12 are located between the two first connecting parts 1311 and are rotatably connected to the first connecting parts 1311 to realize the rotation of the second wheel structures 12 relative to the cushion body 11.

[0145] See also Figure 19 and Figure 24 The connecting support 13 also includes a first limiting portion 133 disposed between the two first connecting portions 1311, and the first limiting portion 133 is used to limit the rotation angle of the second wheel structure 12 to prevent the two second wheel structures 12 from rotating in a direction away from each other when in use.

[0146] See also Figure 24 The connecting support 13 may also include a second limiting portion 134 detachably connected to the first connecting portion 1311. When the second wheel structure 12 is in use, the second limiting portion 134 is disposed on at least one of the two first connecting portions 1311 and is located on the side of the second wheel structure 12 away from the first limiting portion 133. When the second wheel structure 12 is switched from the storage state to the use state, the second limiting portion 134 may be connected to the first connecting portion 1311 to limit the two second wheel structures 12 from rotating in a direction approaching each other. That is, the second limiting portion 134 may limit the rotation of the second wheel structure 12 together with the first limiting portion 133 to prevent the second wheel structure 12 from rotating relative to the connecting support 13 in the use state, thereby improving the structural stability of the second wheel structure 12. When the second wheel structure 12 needs to be switched from the use state to the storage state, the second limiting portion 134 may be separated from the first connecting portion 1311 first, and then the second wheel structure 12 may be rotated in a direction approaching each other.

[0147] For some examples, see Figures 18 to 20 , Figure 25, the second driving component 142 may include a steering motor 1421, a first steering member 1422, and a second steering member 1423 rotatably connected to two connecting supports 13. The first steering member 1422 is connected to the drive shaft of the steering motor 1421 and is rotatably connected to a portion of the second steering member 1423 located between the two connecting supports 13.

[0148] The steering motor 1421 is used to drive the second wheel structure 12 to steer. The first steering member 1422 and the second steering member 1423 are used to transmit the driving force of the steering motor 1421 to the connecting support 13.

[0149] It can be understood that the first steering member 1422, the second steering member 1423, and the two connecting supports 13 form a set of crank connecting mechanisms. Among them, the first steering member 1422 rotates under the drive of the steering motor 1421, and converts the rotation of the drive motor 1411 into the translational motion of the second steering member 1423, and the translational motion of the second steering is converted into the rotational motion of the connecting support 13.

[0150] Exemplarily, please refer to Figure 19 , Figure 20 and Figure 24 , the connecting support 13 has a second connecting portion 135 rotatably connected to the second steering member 1423. The second connecting portion 135 is located on one side of the support body 131 to facilitate the rotational connection between the second connecting portion 135 and the second steering member 1423.

[0151] Exemplarily, please refer to Figures 18 to 21 , the seat cushion body 11 has a first accommodation cavity 11b and an opening 11c communicating the first accommodation cavity 11b with the outside. The steering motor 1421 is disposed in the first accommodation cavity 11b, and the drive shaft of the steering motor 1421 is connected to the first steering member 1422 through the opening 11c. This can not only make the structure of the seat cushion assembly 10 more compact, but also prevent external objects from affecting the operation of the steering motor 1421.

[0152] In one embodiment, please refer to Figure 5 , the seat cushion assembly 10 may include a control component 18. The control component 18 is electrically connected to the power supply structure 15 and the drive structure 14.

[0153] The control component 18 is used to control whether the power supply structure 15 supplies power to the drive structure 14, and can also be used to control the motion state of the drive structure 14.

[0154] The type of the control component 18 is not limited. Exemplarily, the control component 18 can be a mechanical button or a liquid crystal control screen.

[0155] Figure 26The control component shown includes at least five buttons: forward, backward, left turn, right turn, and switch. When the user presses the forward button, the control component 18 controls the driving motor 1411 to rotate forward. At this time, the wheel 121 of the first wheel structure 12 rotates forward, thereby realizing the forward movement of the chair. When the user presses the backward button, the control component 18 controls the driving motor 1411 to rotate backward. At this time, the wheel 121 of the first wheel structure 12 rotates backward, thereby realizing the backward movement of the chair. When the user presses the left turn button, the control component 18 controls the steering motor 1421 to rotate forward. At this time, the wheel 121 of the second wheel structure 12 turns to the left, thereby realizing the left turn of the chair. When the user presses the right turn button, the control component 18 controls the steering motor 1421 to rotate backward. At this time, the wheel 121 of the second wheel structure 12 turns to the right, thereby realizing the right turn of the chair. When the user presses the power switch button, the control component 18 can control the power on and off of the driving motor 1411 and / or the steering motor 1421, so that the first wheel structure 12 and / or the second wheel structure 12 starts to move or stops moving.

[0156] Please refer to Figure 8 , the control component 18 can be arranged on the first part 111 of the seat cushion body 11 for easy operation by the user, and the driving structure 14 is arranged on the second part 112 for the driving structure 14 to drive the wheel 121 to move. More preferably, the control component 18 can be arranged on the second sub-part 1112 of the first part 111.

[0157] In the description of the present application, the descriptions with reference to terms such as "in one embodiment", "in some embodiments", "in other embodiments", "in still other embodiments", or "exemplary" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present application and the features of different embodiments or examples.

[0158] The above description is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A seat cushion assembly for a car seat, characterized in that: The seat cushion assembly is detachably connected to the frame assembly of the automobile seat, and the seat cushion assembly separated from the frame assembly is unfolded to form a chair.

2. The seat cushion assembly according to claim 1, characterized in that: The seat cushion assembly includes a seat cushion body, which includes a first part and a second part that are rotatably connected, wherein the first part includes at least a first sub-part; the first part and the second part rotate relative to each other in directions away from each other so that the first sub-part forms the backrest of the chair and the second part forms the seat of the chair.

3. The seat cushion assembly according to claim 2, characterized in that: The first part includes a second sub-part rotatably connected to the first sub-part. After the first part and the second part rotate relative to each other in directions away from each other, the second sub-part rotates relative to the first sub-part in a direction close to the second part to form the armrest of the chair.

4. The seat cushion assembly according to claim 3, characterized in that: The second sub-section includes a first section and a second section. One end of the first section along the extension direction is rotatably connected to the first sub-section. The second section is slidably matched with the first section and can slide along the extension direction.

5. The seat cushion assembly according to claim 4, characterized in that: One of the first section and the second section has a guide channel, and the other extends into the guide channel and slidably cooperates with the guide channel.

6. The seat cushion assembly according to any one of claims 2 to 5, characterized in that: Before the seat cushion assembly is unfolded, the first part and the second part of the seat cushion body are folded, and a side of the first part facing away from the second part is a seat surface of the seat cushion assembly; and / or, The second part has a storage groove formed by a depression on one side close to the first part. Before the seat cushion assembly is unfolded, the first part and the second part of the seat cushion body are folded, and at least part of the structure of the first part is located in the storage groove.

7. The seat cushion assembly according to claim 1, characterized in that: The seat cushion assembly includes a seat cushion body and a plurality of wheel structures which are arranged on the seat cushion body and have wheels. The chair moves under the drive of the wheels of the wheel structures.

8. The seat cushion assembly according to claim 7, characterized in that: The wheel structure has a storage state in which the wheel is stored in the seat cushion body and a use state in which the wheel drives the chair to move. The wheel structure switches between the storage state and the use state by rotating relative to the seat cushion body.

9. The seat cushion assembly according to claim 8, characterized in that: The seat cushion assembly also includes a connecting support arranged on the seat cushion body, and the wheel structure includes a mounting bracket, which is rotatably connected to the connecting support and the wheel respectively. The mounting bracket rotates relative to the seat cushion body to switch the wheel structure between the storage state and the use state.

10. The seat cushion assembly according to claim 9, characterized in that: The wheel structure includes a connecting shaft passing through the wheel and the mounting bracket, the axial direction of the connecting shaft intersects with the rotation axis of the mounting bracket, and the connecting shaft protrudes along the axial direction from the side of the mounting bracket away from the wheel. When the wheel structure is in the storage state, the portion of the rotation shaft protruding from the mounting bracket abuts against the seat cushion body.

11. The seat cushion assembly according to claim 7, characterized in that: The multiple wheel structures include two first wheel structures, the seat cushion assembly includes a driving structure and a power supply structure electrically connected to the driving structure, and the driving structure includes a first driving component that drives the wheels of the two first wheel structures to rotate.

12. The seat cushion assembly according to claim 11, characterized in that: The first driving assembly includes a driving motor, a transmission mechanism and a transmission shaft. The transmission shaft is coaxially connected to the wheels of the two first wheel structures, and the transmission mechanism is respectively connected to the driving motor and the transmission shaft.

13. The seat cushion assembly according to claim 12, characterized in that: The transmission mechanism includes a first transmission wheel, a second transmission wheel and a transmission belt. The first transmission wheel is arranged on the driving shaft of the driving motor, the second transmission wheel is arranged on the transmission shaft, and the transmission belt is wound around the first transmission wheel and the second transmission wheel.

14. The seat cushion assembly according to claim 12, characterized in that: The transmission shaft is detachably connected to the wheels of the two first wheel structures respectively, and each of the first wheel structures has a storage state in which it is stored in the seat cushion body and a use state in which the chair is moved by the wheels. When the wheels of the two first wheel structures are separated from the transmission shaft, each of the first wheel structures rotates relative to the seat cushion body to switch between the storage state and the use state.

15. The seat cushion assembly according to claim 14, characterized in that: The two first wheel structures are switched from the use state to the storage state by rotating in a direction approaching each other; and / or, The seat cushion assembly also includes an elastic telescopic component corresponding one to one with the first wheel structure, and the opposite ends of the elastic telescopic component along the telescopic direction are respectively connected to the corresponding first wheel structure and the seat cushion body, so that the corresponding first wheel structure has a tendency to rotate in a direction close to the other first wheel structure under the elastic force of the elastic telescopic component.

16. The seat cushion assembly according to claim 14 or 15, characterized in that: The seat cushion assembly also includes a retaining frame rotatably connected to the seat cushion body, and the transmission shaft is arranged on the retaining frame.

17. The seat cushion assembly according to claim 16, characterized in that: The cushion body has a receiving groove formed by a depression, and the receiving groove accommodates the retaining frame and the transmission shaft separated from the wheels of the two first wheel structures.

18. The seat cushion assembly according to claim 7, characterized in that: The multiple wheel structures include two second wheel structures, the seat cushion assembly includes a driving structure and a power supply structure electrically connected to the driving structure, and the driving structure includes a second driving component for driving the two second wheel structures to turn.

19. The seat cushion assembly according to claim 18, characterized in that: The seat cushion assembly includes two connecting supports rotatably connected to the seat cushion body, and the connecting supports are connected to the second wheel structure in a one-to-one correspondence. The second driving component drives the two connecting supports to rotate relative to the seat cushion body, so that the two connecting supports respectively drive the corresponding second wheel structure to turn.

20. The seat cushion assembly according to claim 19, characterized in that: The second driving assembly includes a steering motor, a first steering member and a second steering member rotatably connected to the two connecting supports. The first steering member is connected to the driving shaft of the steering motor and is rotatably connected to the second steering member at a position between the two connecting supports.

21. The seat cushion assembly according to claim 20, characterized in that: The cushion body has a first accommodating cavity and an opening connecting the first accommodating cavity and the outside, the steering motor is arranged in the first accommodating cavity, and the driving shaft of the steering motor is connected to the first steering member through the opening.

22. The seat cushion assembly according to claim 11 or 18, characterized in that: The cushion body has a second accommodating cavity, and the power supply structure is arranged in the second accommodating cavity; and / or, The seat cushion assembly includes a control component, and the control component is electrically connected to the power supply structure and the drive structure.

23. A car seat, characterized in that: include: Frame assembly; The seat cushion assembly according to any one of claims 1 to 22, wherein the seat cushion assembly is detachably connected to the frame assembly.

24. The vehicle seat according to claim 23, characterized in that The frame assembly comprises a backrest assembly and two seat assemblies spaced apart from each other. In the connected state, the seat cushion assembly is located between the two seat assemblies.

25. A vehicle, characterized in that: A car seat comprising the vehicle seat described in claim 23 or 24.

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