Automobile seat

Abstract

The utility model discloses an automobile seat which is characterized in that the automobile seat comprises a seat cushion assembly and a backrest assembly which are of a split structure, and the backrest assembly is installed on a cross beam; the cushion assembly is arranged below the front side of the backrest assembly; the backrest assembly comprises a chair back, a backrest and a headrest; the chair is further provided with a chair back driving part and a backrest driving part, the backrest is arranged on the front side of the chair back, and the backrest driving part drives the bottom of the backrest to rotate around the chair back or the cross beam; the chair back driving part drives the bottom of the chair back to rotate around the cross beam, and when the chair back rotates, the backrest is synchronously driven to rotate along with the chair back; and the headrest is mounted at the top of the backrest. According to the utility model, the comfort and the safety in use are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a seat, especially an automobile seat. BACKGROUND

[0002] The automobile seat is the necessary configuration of the interior trim of the car, and is the most direct manifestation that the owner perceives whether the vehicle is comfortable or not, and the main factor influencing the comfort of the seat is still the man-machine engineering design of the seat.

[0003] The automobile seat mainly includes a backrest, a cushion and a headrest, and the bottom of the backrest is directly rotatably installed at the rear side of the cushion in the normal automobile seat, and the backrest is synchronously moved when the cushion moves.

[0004] 1. When some articles need to be loaded in the trunk of the vehicle, the seat is folded so that the backrest is close to the cushion, and the articles can be placed on the folded backrest, in this way, the articles can damage the backrest, resulting in high maintenance rate;

[0005] 2. The backrest and the cushion are connected, and if the vehicle is hit, the cushioning capacity of the backrest is insufficient, and there is a great safety hazard;

[0006] 3. The backrest only has a metal internal framework, and the backrest is easy to deform when the rear side is hit by external force, and the safety is not good enough;

[0007] 4. If the backrest needs to be repaired, the entire seat needs to be disassembled for repair, and the repair is not convenient;

[0008] 5. When the position of the cushion is adjusted, the backrest will move with it, affecting the use experience;

[0009] 6. If the seat also has a foot support, the foot support is easy to be damaged when stepped on, and the maintenance rate is high. SUMMARY

[0010] The utility model aims at providing an automobile seat, through using the structure, can effectively improve the safety and the comfort that automobile seat uses, also reduce the maintenance rate, prolong the service life.

[0011] In order to achieve the above object, the utility model adopts the technical scheme of an automobile seat, including the cushion assembly and the backrest assembly of split structure, the backrest assembly is installed on the crossbeam.

[0012] The cushion assembly is arranged below the front side of the backrest assembly.

[0013] The backrest assembly includes the backrest, the backrest and the headrest.

[0014] The backrest driving part drives the bottom of the chair back to rotate around the crossbeam, and the backrest rotates synchronously to drive the backrest to rotate around the chair back;

[0015] The backrest driving part drives the bottom of the chair back to rotate around the crossbeam, and the backrest rotates synchronously to drive the backrest to rotate around the chair back;

[0016] The headrest is installed on the top of the backrest.

[0017] In the technical solution, the bottom of the seat cushion assembly is slidably arranged on the seat cushion slide rail; the seat cushion assembly comprises a seat cushion frame and a seat cushion slidably mounted on the seat cushion frame; the seat cushion frame is provided with a seat cushion guide part, which is arranged from back to front and upwardly inclined; the lower part of the seat cushion is slidably connected with the seat cushion guide part;

[0018] A seat cushion driving part is further arranged, which drives the seat cushion to move along the seat cushion guide part.

[0019] In the technical solution, the seat cushion driving part comprises a seat cushion driving member, a seat cushion front side connecting member and a seat cushion rear side connecting member; the seat cushion driving member is mounted on the seat cushion frame;

[0020] The top of the seat cushion front side connecting member and the seat cushion rear side connecting member is mounted on the bottom of the seat cushion; the bottom of the seat cushion front side connecting member is rotatably connected with the seat cushion support on both sides; the bottom of the rear side connecting member is rotatably connected with the seat cushion support on both sides;

[0021] The seat cushion driving member is mounted on the seat cushion support; the seat cushion driving member is configured to drive the seat cushion front side connecting member or the seat cushion rear side connecting member to rotate around the seat cushion frame, and drive the seat cushion to move forward and backward along the seat cushion guide part.

[0022] In the technical solution, the front end of the seat cushion assembly is further rotatably mounted with a foot support part; the lower part of the seat cushion assembly is provided with a foot support driving part; the foot support driving part drives the foot support part to rotate around the seat cushion assembly, and makes the foot support part to be unfolded or stored.

[0023] In the technical solution, the bottom surface of the foot support part is provided with a foot support connecting shaft; the foot support driving part is connected with the foot support connecting shaft through a transmission mechanism;

[0024] The transmission mechanism comprises a transmission member; the front end of the transmission member is rotatably connected with the foot support connecting shaft; the driving end of the foot support driving part is connected with the transmission member; the extension and retraction of the driving end of the foot support driving part drives the foot support part to rotate around the seat cushion assembly through the transmission member and the foot support connecting shaft.

[0025] The transmission member is provided with a groove, the foot support connecting shaft is rotationally connected with the groove, and the foot support connecting shaft can move along the groove;

[0026] Further comprising a limiting member and a tension spring, the middle part of the limiting member is rotationally connected with the rear end of the bottom of the transmission member, the front end top of the limiting member is provided with a limiting groove, and the two ends of the tension spring are connected with the transmission member and the limiting member respectively.

[0027] In the above technical solution, the front end of the limiting member is provided with a front end protrusion extending upward, the middle part of the top surface of the limiting member is provided with a middle part protrusion, and the limiting groove is formed above the limiting member between the front end protrusion and the middle part protrusion.

[0028] In the above technical solution, the chair back driving part comprises a chair back motor and a first gear, the chair back motor and the first gear are installed on the chair back, a first toothed plate is installed on the cross beam, the first gear is engaged with the first toothed plate, and the chair back motor drives the first gear to rotate and drives the chair back to rotate around the cross beam.

[0029] In the above technical solution, a first connecting gear is also rotationally installed on the chair back, one side of the first connecting gear is engaged with the first gear, and the other side of the first connecting gear is engaged with the first toothed plate.

[0030] In the above technical solution, the backrest driving part comprises a second motor, a second gear and a second toothed plate, the second gear is engaged with the second gear, and the second motor drives the second gear to rotate;

[0031] The second toothed plate is installed on the chair back, the second motor is installed on the backrest, and when the second motor drives the second gear to rotate, the bottom of the backrest is driven to rotate around the chair back;

[0032] Or, the second toothed plate is installed on the backrest, the second motor is installed on the chair back, and when the second motor drives the second gear to rotate, the bottom of the backrest is driven to rotate around the chair back.

[0033] In the above technical solution, the headrest is installed on the top of the backrest through at least two headrest rods, and the headrest can move up and down relative to the headrest rods.

[0034] In the technical scheme, the headrest is internally provided with a headrest up-down driving part for driving the headrest to move up and down along the headrest rod, the headrest up-down driving part comprises a first headrest motor and a first headrest gear mounted in the headrest, at least one headrest rod rack is arranged on the headrest rod, the headrest rod rack is arranged along the length direction of the headrest rod, the first headrest gear is engaged with the headrest rod rack, and the first headrest motor drives the first headrest gear to rotate and drives the headrest to move up and down relative to the headrest rod through the headrest rod rack.

[0035] In the technical scheme, the headrest comprises a rear headrest part and a front headrest part, the rear headrest part is mounted on the headrest rod, the top rear side of the front headrest part is rotationally connected with the top front side of the rear headrest part, and the headrest up-down driving part is mounted in the rear headrest part.

[0036] In addition, the rear headrest part is further provided with a headrest rotation driving part for driving the front headrest part to rotate around the rear headrest part.

[0037] In the technical scheme, the front headrest part comprises a middle headrest and two side headrests, the rear end top of the middle headrest is rotationally connected with the top front side of the rear headrest part, the two side headrests are symmetrically arranged on the two sides of the middle headrest, the inner end of each side headrest is rotationally connected with the side of the middle headrest through a damping part, and the headrest rotation driving part drives the middle headrest to rotate around the rear headrest part.

[0038] In the technical scheme, the side wall of the chair back is provided with a locking limiting part, and the locking limiting part can limit the chair back on the automobile.

[0039] Compared with the prior art, the utility model has the following advantages due to the above technical scheme:

[0040] 1. The seat cushion assembly and the backrest assembly are separately arranged in the utility model, and the seat cushion assembly and the backrest assembly can be independently adjusted, the position and angle of the backrest assembly do not change when the front and rear positions and the height position of the seat cushion assembly are adjusted, and therefore the convenience and comfort of the user during adjustment can be effectively improved.

[0041] 2. The backrest assembly is composed of a backrest and a chair back in the utility model, the chair back is directly rotationally connected with the cross beam and is not connected with the seat cushion, and therefore the backrest assembly is not adjusted when the seat cushion is adjusted, the backrest assembly is independently adjusted, and the experience of the user can be effectively improved.

[0042] 3. The chair back is arranged on the rear side of the backrest in the utility model, the impact resistance of the backrest can be effectively improved, the strength of the backrest assembly as a whole is improved, and the strength and safety of the automobile seat are improved.

[0043] 4. The utility model discloses a chair back is arranged at the back side of the backrest, and after the folding of the backrest assembly, the article is placed on the chair back, does not damage the backrest, effectively reduces the maintenance rate, and when maintaining, only needs to disassemble the backrest assembly, does not need to disassemble the whole seat, also reduces the maintenance difficulty;

[0044] 5. The utility model discloses a chair back adjustment, can drive the backrest adjustment simultaneously, can be individually adjusted to the backrest when the backrest adjustment, the angle of adjustment is bigger, improves the comfort of user;

[0045] 6. The utility model discloses a chair back side wall is provided with the lock limiting piece that can be attached with the car, so that the chair back bottom is not only positioned through the crossbeam, and the top of the chair back can also be positioned through the car, and the multi-point positioning prevents, effectively increases the strength and the anti - shock ability of backrest assembly, improves the security, reduces the security risk;

[0046] 7. The utility model discloses a headrest is provided with headrest up-down drive part in, and the headrest up-down drive part drives the headrest to move up and down relative to the headrest rod, compared with the structure that the headrest up-down drive part is set up in the backrest in the past, can reduce the occupancy of backrest space, and it is convenient for the upgrading of backrest function, and when the headrest up-down drive part needs maintenance, only needs to disassemble the headrest, improves the convenience of maintenance, and reduces the maintenance difficulty;

[0047] 8. The utility model discloses a headrest includes front side headrest part and rear side headrest part, and the front side headrest part can rotate or move relative to the rear side headrest part, so that the distance and the inclination angle of the front side headrest part relative to the rear side headrest part can be adjusted, the position and the angle of headrest can be conveniently adjusted according to the user, and the comfort of user is improved;

[0048] 9. The utility model discloses a seat cushion assembly includes seat cushion frame and the seat cushion of sliding setting on seat cushion frame, is provided with the seat cushion guide portion of oblique setting on seat cushion frame, and the lower side of seat cushion and seat cushion guide portion are connected slidingly, and drive seat cushion to slide along seat cushion guide portion obliquely through seat cushion drive portion, thereby realizing the lifting and lowering of seat cushion, so that seat cushion can be attached with the leg of passenger, the comfort of passenger is improved, and the number of motor is also reduced, and cost can also be reduced;

[0049] 10. The utility model discloses a seat cushion front side connecting piece, seat cushion rear side connecting piece, seat cushion and seat cushion frame constitute parallelogram structure, drive seat cushion front side connecting piece, seat cushion rear side connecting piece rotates around seat cushion frame through seat cushion drive piece, so as to drive seat cushion to move obliquely along seat cushion guide portion, lift and lower seat cushion, and ensure that seat cushion is always attached with the leg of passenger, and the comfort of passenger is improved;

[0050] 11. The utility model discloses a foot support part is rotatably installed at the front end of the cushion, and the foot support driving part drives the foot support part to rotate around the cushion, wherein the recess is arranged on the transmission part, the foot support connecting shaft rotates in the recess, and the foot support connecting shaft can move in the recess, and the limiting piece and the tension spring are further arranged, the limiting piece is rotated and makes the limiting groove clamp the foot support connecting shaft through the tension spring, when the foot support connecting shaft is extruded and separates from the limiting groove and moves in the recess, the foot support connecting shaft moves along the recess and overturns towards the storage direction, and the transmission part and the foot support driving part are prevented from being damaged, and the foot support connecting shaft can be reset in the limiting groove subsequently, the service life of the foot support is effectively prolonged, and the maintenance rate is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 It is the structural schematic diagram of the utility model embodiment one (two seats are installed in side -by -side state);

[0052] Figure 2 It is the structural schematic diagram of the backrest assembly in the utility model embodiment one (the headrest is not shown);

[0053] Figure 3 It is the structural schematic diagram of the backrest assembly in the utility model embodiment one (the headrest is not shown, and the state of the coil spring is shown);

[0054] Figure 4 It is Figure 3 The structural schematic diagram of the chair back driving part (the chair back and the backrest part are not shown, and the chair back driving part is exposed);

[0055] Figure 5 It is the structural schematic diagram of the backrest assembly in the utility model embodiment one (the headrest is not shown, and the side view of the backrest driving part is shown);

[0056] Figure 6 It is Figure 5 The structural schematic diagram of the backrest driving part (the chair back and the backrest part are not shown, and the backrest driving part is exposed);

[0057] Figure 7 It is the structural schematic diagram of the headrest in the utility model embodiment one;

[0058] Figure 8 It is the structural schematic diagram of the headrest in the utility model embodiment one (the internal structure of the rear headrest part is shown in the state);

[0059] Figure 9 It is Figure 8 The sectional view structural schematic diagram (the sectional view state of the first headrest gear and the headrest rod rack connection);

[0060] Figure 10 is a sectional structure schematic view (second headrest gear and longitudinal rack connection place under the sectional view state) in Figure 8

[0061] Figure 11 is a structure schematic view of the headrest in the embodiment one of the utility model (the internal structure of rear side headrest part shows state, rear side headrest part internal part mechanism is not shown);

[0062] Figure 12 is a sectional structure schematic view of Figure 11

[0063] Figure 13 is a structure schematic view of the gear and front side headrest part connection place in the embodiment one of the utility model (the front side headrest part shows part);

[0064] Figure 14 is a structure schematic view of the cushion assembly in the embodiment one of the utility model (foot support part is not shown);

[0065] Figure 15 is a sectional view of Figure 14

[0066] Figure 16 is a structure schematic view of the cushion assembly in the embodiment one of the utility model (foot support part is not shown, cushion part is not shown);

[0067] Figure 17 is a structure schematic view of another angle in Figure 16

[0068] Figure 18 is a structure schematic view of another angle in Figure 16

[0069] Figure 19 is a structure schematic view of the cushion assembly in the embodiment one of the utility model (cushion slide rail is not shown);

[0070] Figure 20 is a structure schematic view of bottom angle in Figure 19

[0071] Figure 21 is a structure schematic view of foot support part installation place in the embodiment one of the utility model;

[0072] Figure 22 is a sectional view of Figure 21

[0073] Figure 23 is a three-dimensional structure schematic view of Figure 21

[0074] Figure 24 ​​​​​​​​is a structural schematic diagram of the foot support driving part and the transmission mechanism in the embodiment one of the utility model;

[0075] Figure 25 is Figure 24 is a structural schematic diagram of the transmission mechanism in the disassembled state.

[0076] 1, cushion assembly; 11, cushion slide rail; 12, cushion frame; 13, cushion; 120, cushion guide part; 130, cushion connecting plate; 140, cushion driving part; 141, front side connecting piece of cushion; 142, rear side connecting piece of cushion; 1201, sliding block; 1401, cushion driving motor; 1402, cushion driving screw; 1403, cushion driving screw support; 1410, front side connecting pipe; 1411, front side connecting piece; 1412, front side connecting plate;

[0077] 2, backrest assembly; 21, chair back; 22, backrest; 23, headrest; 24, headrest rod; 25, chair back driving part; 26, backrest driving part; 210, locking limiting piece; 230, headrest up and down driving part; 231, rear side headrest part; 232, front side headrest part; 233, headrest rotary driving part; 234, gear ware; 240, headrest rod rack; 250, chair back motor; 251, first gear; 252, first toothed plate; 253, first arc-shaped groove; 254, first limiting rod; 255, first connecting gear; 260, backrest motor; 261, second gear; 262, second toothed plate; 263, second arc-shaped groove; 2301, first headrest motor; 2302, first headrest gear; 2303, first headrest gear connecting rod; 2320, middle head support; 2321, side head support; 2331, second headrest motor; 2332, second headrest gear; 2333, headrest pushing part; 2334, longitudinal rack; 2335, second headrest gear connecting rod; 2340, pushing piece; 2341, arc-shaped rack; 2342, tension spring; 2343, reset piece; 2344, pushing tooth; 2345, convex tooth; 2346, disengaging slope;

[0078] 3, cross beam; 31, cross beam connecting shaft; 32, cross beam connecting plate; 33, coil spring;

[0079] 4, foot support part; 41, foot support driving part; 42, foot support connecting shaft; 43, transmission mechanism; 44, connecting arm; 410, foot support driving motor; 411, foot support screw rod; 412, foot support screw rod support; 430, transmission piece; 431, limiting piece; 432, tension spring; 440, connecting convex; 441, left side arm; 442, right side wall; 443, middle connecting pipe; 4301, groove; 4310, limiting groove; 4311, front end convex; 4312, middle convex. DETAILED DESCRIPTION

[0080] The utility model is further described below in combination with the drawings and examples:

[0081] Example one: see Figures 1-25 As shown in the figure, an automobile seat comprises a seat cushion assembly 1 and a backrest assembly 2 in a split structure, the backrest assembly 2 is installed on a crossbeam 3;

[0082] The seat cushion assembly 1 is arranged below the front side of the backrest assembly 3.

[0083] In this structure, the bottom of the seat cushion assembly is installed on the vehicle through the seat cushion slide rail, the crossbeam is also installed on the vehicle, the seat cushion assembly and the backrest assembly in a split structure, when the seat cushion assembly moves forward and backward along the seat cushion slide rail, the position of the backrest assembly will not move with the seat cushion assembly as in the previous structure (in the previous structure, the backrest assembly is directly connected with the seat cushion assembly), so that the position of the seat cushion assembly can be adjusted alone, the angle of the backrest assembly can also be adjusted alone, the convenience of adjustment is improved, the most comfortable angle of the passenger can be quickly and conveniently adjusted, and the user experience is improved. Moreover, if any of the seat cushion assembly or the backrest assembly is damaged and needs to be repaired, the corresponding seat cushion assembly or backrest assembly can be individually removed from the vehicle for repair, and the convenience of repair is also improved.

[0084] Backrest assembly:

[0085] See Figures 1-13 As shown in the figure, the backrest assembly comprises:

[0086] A chair back 21, the bottom of the chair back 21 is rotatably installed on a crossbeam 3;

[0087] A backrest 22, the backrest 22 is arranged on the front side of the chair back 21, and the bottom of the backrest 22 is rotatably connected with the bottom of the chair back 21 or the crossbeam 3;

[0088] A chair back driving part 25, the chair back driving part 25 drives the chair back 21 to rotate around the crossbeam 3, and when the chair back 21 rotates, the backrest 22 is synchronously driven to rotate with the chair back 21;

[0089] A backrest driving part 26, the backrest driving part 26 drives the backrest 22 to rotate around the chair back 21 or the crossbeam 3;

[0090] A headrest 23, the headrest 23 is installed on the top of the backrest 22.

[0091] In this embodiment, the cross beam is directly installed on the automobile, wherein the cross beam is installed inside the automobile, which can be directly installed on the bottom surface inside the car compartment, or fixed on the frame inside the car compartment, wherein the automobile seat comprises a backrest assembly 2 and a seat cushion assembly 1, the bottom of the seat cushion assembly is installed on the automobile through the seat cushion slide rail, and the seat cushion assembly is located at the front side of the backrest assembly, when the seat cushion assembly is adjusted in the front-rear direction along the seat cushion slide rail, the backrest assembly does not move simultaneously with the seat cushion assembly. The chair back is mainly made of metal material, such as aluminum profile and steel profile, which has high strength, and the backrest is located at the front side of the chair back. In this way, when the automobile is impacted from the back, the chair back can provide certain protection, thereby increasing the safety performance. At the same time, when the backrest assembly is folded (the backrest and the chair back are flipped forward and close to or attached to the seat cushion assembly, so that the rear side of the chair back is basically parallel to the bottom of the car compartment), when the automobile is used to store things, the things are placed on the chair back, which will not damage the backrest, thereby protecting the backrest. In particular, the backrest is a multifunctional backrest, for example, having ventilation, heating, massage, and waist support adjustment functions (the backrest in the utility model has these functions), if the things are placed on the folded backrest, the various functional components inside the backrest may be damaged, and the arrangement of the chair back can protect the backrest and prevent the damage of the functional components inside the backrest, thereby reducing the maintenance rate. The chair back can be flipped by 180 degrees or more than 180 degrees, and when the chair back is flipped backward to the maximum, the rear bottom of the chair back abuts against the cross beam, thereby supporting and limiting the chair back, and when the chair back is flipped forward, the backrest can be flipped to abut against the seat cushion assembly.

[0092] The arrangement of the chair back driving part can drive the chair back to rotate around the cross beam, and when the chair back rotates, the backrest and the backrest driving part can rotate simultaneously, thereby realizing the large-angle rotation adjustment of the backrest. When the chair back driving part drives the chair back and the backrest to rotate simultaneously, by separately arranging the backrest driving part, the backrest driving part is used to drive the backrest to rotate at a small angle relative to the chair back, that is, the backrest is adjusted at a certain angle, thereby improving the comfort of the user.

[0093] Further, referring to Figure 1 , 6As shown, the side wall of the chair back 21 is provided with a locking limiting piece 210, which can limit the chair back 21 on the car. Preferably, a locking limiting piece is arranged on the B column of the car (if the car has a third row, it is arranged on the car beside the third row position, generally not installed on the driver's seat, if the car is a two-seater car, it can also be installed on the driver's seat and the front passenger seat, and the locking limiting piece is arranged on the car beside the corresponding position). In this embodiment, the car seat is installed in the rear row position, and in the unfolded state of the chair back (turned back away from the cushion assembly), the locking limiting piece is connected with the locking limiting piece of the car, so that the upper and lower parts of the backrest assembly can be limited (the upper part is limited by the connection of the locking limiting piece and the locking limiting piece of the car, and the lower part is limited by the cross beam), preventing the backrest assembly from being impacted and turned to the front (the backrest assembly is turned to the top of the cushion assembly), reducing the possibility of the backrest assembly turning forward after being stressed, and reducing the safety hazard (in the past car seats, the backrest is directly connected with the cushion and is limited by the motor or manual angle adjusting structure itself, which is extremely easy to damage and cause safety risk under external impact force). For example, the locking limiting piece is a square buckle, or an arc buckle, or other types of ring buckle (a ring-shaped metal piece), and the locking limiting piece adopts an electronic lock buckle or a relatively low-cost safety buckle. When the chair back is turned back, the locking limiting piece touches the safety buckle (for example, the safety buckle), extrudes the rotating part of the safety buckle, and after completely entering the safety buckle, the rotating part of the safety buckle resets, so that the safety buckle and the locking limiting piece are connected and the locking limiting piece is limited. When the chair back needs to be turned forward, press the rotating part of the safety buckle with your hand to open the safety buckle, and after the chair back is turned and the locking limiting piece is separated from the safety buckle, release the rotating part of the safety buckle to make the chair back normally turn forward. Of course, the locking limiting piece can also adopt a safety buckle, and the locking limiting piece can adopt a ring buckle. Of course, the locking limiting piece and the locking limiting piece can be electric structures, which can realize the functions of locking and unlocking.

[0094] In this embodiment, the cross beam connecting shaft 31 is arranged, the front bottom side of the backrest is rotatably connected with the cross beam connecting shaft, and the rear bottom side of the backrest is also rotatably connected with the cross beam connecting shaft. Preferably, in this embodiment, the cross beam is provided with a pair of cross beam connecting plates 32 extending forward, and two cross beam connecting plates are arranged corresponding to one set of backrest assembly. If two sets of backrest assemblies are arranged on the cross beam, four cross beam connecting plates are arranged on the cross beam, and one cross beam connecting shaft is arranged on each cross beam connecting plate. The two sides of the front end of the bottom of the backrest are rotatably connected with two cross beam connecting shafts respectively, and the two sides of the rear end of the bottom of the backrest are also rotatably connected with two cross beam connecting shafts respectively. In this structure, the backrest driving part is close to one cross beam connecting shaft, and the backrest driving part is close to the other cross beam connecting shaft. If only one cross beam connecting shaft is used (the two ends of the cross beam connecting shaft are connected with two cross beam connecting plates respectively), the backrest driving part and the backrest driving part are arranged at the two ends of the cross beam connecting shaft respectively, which is convenient for the layout of the backrest driving part and the backrest driving part.

[0095] Referring to Figure 4 As shown in the figure, the backrest driving part 25 includes a backrest motor 250 and a first gear 251, the backrest motor 250 is installed on the backrest 21, a first tooth plate 252 is installed on the cross beam 3, the first gear 251 is engaged with the first tooth plate 252, the backrest motor 250 drives the first gear 251 to rotate, and drives the backrest 21 to rotate around the cross beam 3.

[0096] In this embodiment, the two sides of the backrest are respectively rotated on the two beam connecting shafts, the tooth pieces outside the first tooth plate (the first arc-shaped gear rack) are coaxially arranged on the beam and are mounted on the beam, which can be fixedly mounted on the beam connecting shaft or the beam connecting plate, and the backrest motor is mounted on the front side of the backrest between the backrest and the back support, which is hidden by the backrest and the back support and is more beautiful. The output shaft of the backrest motor is connected with the first gear, or the backrest motor is connected with the first gear through a reduction mechanism, which is used to drive the first gear to rotate, and the first gear is rotatably mounted on the backrest. In this way, the position of the first gear can be always kept unchanged, and the engagement degree with the first gear can be ensured (if the first gear is only connected with the output shaft of the backrest motor or the reduction mechanism, the connection position of the first gear with the backrest motor or the reduction mechanism is easy to be deformed and damaged under force). The outer surface of the first tooth plate 252 is provided with a first arc-shaped gear rack, and the first tooth plate is provided with a first arc-shaped groove 253. The first gear is engaged with the first arc-shaped gear rack of the first tooth plate, and the backrest is provided with a first limiting rod 254 which is inserted into the first arc-shaped groove 253. The first limiting rod can move in the first arc-shaped groove. When the first gear is driven to rotate by the backrest motor, the rotating connection position of the backrest and the beam is coaxially arranged with the axis of the first tooth plate, the first arc-shaped gear rack, the first arc-shaped groove and the beam connecting shaft are coaxially arranged, and the first tooth plate is fixed. Therefore, when the first gear rotates, the first gear will rotate around the first tooth plate, and the first limiting rod will also move along the first arc-shaped groove, so as to drive the backrest to rotate around the beam, thereby realizing the adjustment of the angle of the backrest. The first arc-shaped groove and the first limiting rod can limit the rotating angle of the backrest relative to the beam. Preferably, the rotating angle of the backrest is within 180 degrees or about 180 degrees, and according to the actual situation, the first arc-shaped groove with the required length can be opened, and the length of the first arc-shaped gear rack is greater than that of the first arc-shaped groove, so as to prevent the tooth falling phenomenon.

[0097] Further, referring to Figure 4 It is shown that the first connecting gear 255 is rotatably mounted on the backrest 21, one side of the first connecting gear 255 is engaged with the first gear 251, and the other side of the first connecting gear 255 is engaged with the first tooth plate 252 (engaged with the first arc-shaped gear rack).

[0098] If the first gear and the first toothed plate are directly engaged, the size of the first gear is not well designed, the transmission ratio is not well adjusted, or according to the size of the chair back and the back, the position of the chair back motor is not well laid out, or other reasons, etc. Therefore, a first connecting gear is also provided for adjusting the transmission ratio, facilitating control of the speed of the chair back, or the position of the chair back motor can be optimally designed, or other. Of course, the first connecting gear can also not be provided. When the first gear rotates, the first connecting gear also rotates with it. Since the first connecting gear and the first toothed plate are engaged, the first connecting gear will rotate around the first toothed plate, thereby driving the chair back to rotate around the first toothed plate (cross beam).

[0099] Referring to Figure 5 、 6 As shown in FIG. 26, the back driving part 26 includes a back motor 260, a second gear 261 and a second toothed plate 262, the second gear 261 is engaged with the second toothed plate 262, and the back motor 260 drives the second gear 261 to rotate.

[0100] In the utility model, the installation position of the back driving part has two kinds, the first kind: the second toothed plate is installed on the chair back, the back motor is installed on the back, and when the back motor drives the second gear to rotate, the bottom of the back is driven to rotate around the chair back or cross beam.

[0101] The second kind: the second toothed plate 262 is installed on the back 22, the back motor 260 is installed on the chair back 21, and when the back motor 260 drives the second gear 261 to rotate, the bottom of the back 22 is driven to rotate around the chair back 21 or cross beam 3. In the embodiment, the second structure is adopted.

[0102] In the utility model, no matter which kind of installation position of the back driving part is adopted, the rotation of the second gear can be driven by the back motor, and the back is driven to rotate around the chair back or cross beam through the engagement of the second gear and the second toothed plate.

[0103] The chair back is connected with the cross beam connection shaft, the backrest is also connected with the cross beam connection shaft, or the backrest and the chair back are connected, and the rotation connection position of the backrest and the chair back is coaxial with the rotation connection position of the chair back and the cross beam. Therefore, the backrest can rotate relative to the cross beam or the chair back. In the embodiment, the backrest is connected with two cross beam connection shafts, the second gear is mounted on the backrest, the backrest motor is mounted on the chair back, and the output shaft of the backrest motor is connected with the second gear or connected with the second gear through a speed reduction mechanism. When the backrest motor drives the second gear to rotate, the second gear pushes the second gear plate to rotate around the cross beam connection shaft, thereby driving the backrest to rotate relative to the cross beam connection shaft. Since the chair back does not rotate at this time, the backrest rotates relative to the chair back, thereby adjusting the angle of the backrest.

[0104] In the embodiment, the chair back driving part is arranged on one cross beam connection shaft side, the backrest driving part is arranged on the other cross beam connection shaft side, and the backrest driving part is arranged between the chair back and the backrest, so that the backrest driving part is not exposed and is more beautiful. The chair back driving part and the backrest driving part are arranged on the two sides of the backrest, so that the chair back driving part and the backrest driving part are prevented from interfering with each other. The second arc-shaped groove 263 is arranged on the second gear plate 262, the rotation connection position of the backrest 22 and the chair back 21 is coaxial with the second arc-shaped groove 263, or the rotation connection position of the backrest and the cross beam is coaxial with the second arc-shaped groove. In the embodiment, the second arc-shaped groove is coaxial with the cross beam connection shaft, and the second arc-shaped groove has a second arc-shaped gear rack on the top surface or the bottom surface. The second gear is arranged in the second arc-shaped groove and is engaged with the second arc-shaped gear rack. In this way, the rotation angle of the backrest is limited due to the length of the second arc-shaped groove and the second arc-shaped gear rack. When the chair back rotates and drives the backrest to rotate, the angle of the backrest can be adjusted independently, and the rotation angle of the backrest relative to the chair back is limited by the second arc-shaped groove, so that the backrest can be adjusted by a certain angle relative to the chair back, thereby improving the comfort of the user.

[0105] Wherein, when the backrest is angle-adjusted, the backrest driving part will not work, i.e. the second gear will not rotate, and due to the engagement between the second gear and the second toothed plate, the relative position of the two will not change, at this time, the backrest and the backrest are equivalent to a whole structure, therefore, when the backrest motor drives the first gear to rotate, it will drive the backrest and the backrest to rotate around the crossbeam at the same time, and drive the whole backrest assembly to be angle-adjusted, and when the backrest motor does not work, the backrest motor works alone, which will drive the backrest to rotate relative to the backrest, and adjust the angle of the backrest alone (when the passenger sits on the cushion assembly, the passenger's back will lean against the backrest, and the backrest will support the passenger's back, and the passenger's back and waist will not contact the backrest).

[0106] Meanwhile, in the embodiment, the backrest is locked with the vehicle alone, and the backrest is not locked with the vehicle, in this way, when the backrest is angle-adjusted alone, the backrest does not need to be unlocked with the vehicle, and the safety is higher. Moreover, the backrest assembly adopts the structure of the backrest and the backrest, which is not only safer, but also more beautiful, and the whole seat is more atmospheric.

[0107] Furthermore, two coil springs 33 (or torsion springs) are sleeved on one of the crossbeam connecting shafts, the inner ends of the two coil springs are connected with the crossbeam connecting shaft, the outer end of one of the coil springs is connected with the backrest, and the outer end of the other coil spring is connected with the backrest, in this way, a pre-tightening force can be applied to the backrest and the backrest through the corresponding coil springs, so that the backrest and the backrest are more stable and more labor-saving during angle adjustment, and the stability is higher (there is a little gap between the gear and the toothed plate, so there may be a shaking problem, and the pre-tightening force is applied to the backrest and the backrest through the coil spring to prevent the shaking and make it more stable).

[0108] Headrest:

[0109] Referring to Figure 1 、 7 -13, the headrest 23 is installed on the top of the backrest 22 through at least two headrest rods 24, the bottom of the headrest rod 24 is connected with the top of the backrest 22, and the headrest 23 can move up and down relative to the headrest rod 24. When the backrest is rotated, the headrest will also be rotated at the same time to be angle-adjusted.

[0110] The headrest 23 is internally provided with a headrest up-down driving part 230 for driving the headrest 23 to move up and down along the headrest rod 24, the headrest up-down driving part 230 comprises a first headrest motor 2301 and a first headrest gear 2302 mounted in the headrest 23, at least one headrest rod rack 240 is arranged on the headrest rod 24 along the length direction of the headrest rod 24, the first headrest gear 2302 is engaged with the headrest rod rack 240, and the first headrest motor 2301 drives the first headrest gear 2302 to rotate and drives the headrest 23 to move up and down relative to the headrest rod 24 through the headrest rod rack 240.

[0111] In this structure, the headrest up-down driving part is arranged inside the headrest, which can reduce the occupation of the internal space of the backrest, and the internal space of the backrest can be more convenient for the layout of other components, such as the arrangement of the waist support adjusting mechanism, the waist massage mechanism, etc., so that the backrest can have more functions (in the previous structure, the mechanism for driving the headrest to move up and down is arranged in the backrest. Since the backrest is the back and waist supporting position, as a multifunctional electric seat, the backrest part is provided with functions such as waist adjustment, heating, etc., and may also have a massage function. Since the backrest part needs to realize more functions, if the driving motor of the headrest is arranged in the backrest, the internal space layout is difficult to meet the functions, or some functional parts cannot be arranged. At the same time, if the motor is damaged, the entire backrest or the entire seat needs to be removed from the vehicle and disassembled for maintenance, which is difficult to maintain and has high maintenance cost). When the height of the headrest needs to be adjusted relative to the backrest, the first headrest motor works to drive the first headrest gear to rotate. Since the first headrest gear is engaged with the headrest rod rack on the headrest rod, the headrest can be driven to move up and down relative to the backrest, thereby realizing the height adjustment of the headrest. Moreover, at least two headrest rods are arranged, which can limit the headrest and prevent the headrest from rotating relative to the backrest, so as to ensure that the headrest can stably move up and down relative to the backrest when the height of the headrest needs to be adjusted. If the headrest up-down adjustment fails, the headrest rod can be removed from the backrest, and the headrest can be disassembled for maintenance, which is more convenient for maintenance.

[0112] Preferably, in the embodiment, the headrest rod is made of metal, the bottom and the backrest are fixed, the headrest rod rack is a separate part, which is detachably mounted on the headrest rod, which can be made of plastic or metal, and the headrest rod and the headrest rod rack are separately processed and assembled. In this way, it is convenient for production, and at the same time, since the headrest is adjusted up and down, the first headrest gear is rotated and engaged with the headrest rod rack, the headrest rod rack may be damaged, which is convenient for maintenance and replacement, and the maintenance and replacement cost is reduced. And in the embodiment, a headrest sliding groove matched with the headrest rod is arranged in the headrest, the headrest is slidably connected with the headrest rod through the headrest sliding groove, so as to ensure the stability and smoothness of the headrest moving up and down, and prevent the occurrence of jamming problem.

[0113] Referring to Figures 7-9 As shown in the figure, the headrest rod 24 is two, the two headrest rods 24 are arranged at intervals, and each headrest rod 24 is provided with a headrest rod rack 240; the headrest rod rack is above the backrest and is not inserted into the backrest.

[0114] The first headrest gear 2302 is two, each first headrest gear 2302 is engaged with a headrest rod rack 240;

[0115] A first headrest gear connecting rod 2303 is also provided, the two ends of the first headrest gear connecting rod 2303 are respectively connected with the two first headrest gears 2302, and the first headrest gear connecting rod 2303 is rotatably connected with the headrest 23. The first headrest motor 2301 drives the first headrest gear connecting rod 2303 to rotate, and simultaneously drives the two first headrest gears 2302 to rotate.

[0116] In the embodiment, the headrest rod rack is arranged on the two headrest rods, and the first headrest gear is two. When the first headrest motor drives the first headrest gear connecting rod to rotate, it synchronously drives the two first headrest gears to rotate, thereby driving the headrest to move relative to the two headrest rods, adjusting the height of the headrest relative to the backrest. Moreover, the arrangement of the two first headrest gears and the two headrest rod racks makes the headrest on both sides be driven by the height adjustment force when the height is adjusted, so that the headrest moves more stably during up and down movement, preventing the problem of unstable sliding of the headrest on one side (if only one first headrest gear and one headrest rod rack are used) due to stress. It ensures the smoothness and stability of the headrest movement, and also reduces the problem of easy wear on one side due to one-sided stress, so that the maintenance rate is high.

[0117] Referring to Figure 1 , 7As shown in FIG. 10, the headrest 23 comprises a rear headrest part 231 and a front headrest part 232, the rear headrest part 231 is mounted on the headrest rod 24, the top rear side of the front headrest part 232 is rotationally connected with the top front side of the rear headrest part 231, and the headrest up-down driving part 230 is mounted in the rear headrest part 231;

[0118] The rear headrest part 231 is further provided with a headrest rotation driving part 233 for driving the front headrest part 232 to rotate around the rear headrest part 231.

[0119] In this embodiment, the headrest comprises a rear headrest part and a front headrest part, the front headrest part is capable of rotating around the rear headrest part, and the front headrest part is used for supporting and abutting against the head and neck of the passenger. When the headrest up-down driving part works, it drives the rear headrest part to move up and down relative to the headrest rod. Since the front headrest part and the rear headrest part are rotationally connected, when the rear headrest part moves up and down, the front headrest part will move up and down at the same time. When it is necessary to adjust the front-rear position and angle of the headrest, the headrest rotation driving part is used to drive the front headrest part to rotate around the rear headrest part, so as to adjust the distance between the front end bottom of the front headrest part and the rear headrest part, and further adjust the inclination angle and position of the front end surface of the front headrest part, so as to support the head of the passenger at the most comfortable angle.

[0120] Referring to FIG. 11, Figures 8-13 As shown in FIG. 11, the headrest rotation driving part comprises a second headrest motor 2331, a second headrest gear 2332 and a headrest pushing part 2333, the second headrest motor 2331 is mounted in the rear headrest part 231, the headrest pushing part 2333 is longitudinally movably mounted in the rear headrest part 231, and the headrest pushing part 2333 is provided with a longitudinal rack 2334 which is engaged with the second headrest gear 2332; the second headrest motor 2331 drives the second headrest gear 2332 to rotate and drives the headrest pushing part 2333 to move forward and backward;

[0121] The headrest 23 is provided with a gear 234, when the headrest pushing part 2333 moves forward and backward, the gear 234 drives the front headrest part 232 to rotate around the rear headrest part 231. (Of course, the headrest can also not be provided with a gear, and another structure is adopted, the headrest pushing part includes a headrest pushing plate and two headrest connecting rods, the longitudinal rack is arranged on the headrest pushing plate, the two headrest connecting rods are arranged left and right, the front end of the headrest connecting rod is rotationally connected with the front headrest part, and the rear end of the headrest connecting rod is rotationally connected with the headrest pushing plate. In this way, when the headrest pushing plate moves forward and backward, the bottom of the front headrest part can be pushed forward and backward by the headrest connecting rod, and the front headrest part is rotated relative to the rear headrest part, wherein the headrest connecting rod is below the rotationally connected place of the front headrest part and the rear headrest part, thereby affecting the rotation of the front headrest part relative to the rear headrest part. In this structure, the headrest pushing part can be stopped at any position, and the front headrest part can be rotated to any position to support the head of the passenger. In the embodiment, the gear is adopted as an example.

[0122] In this structure, the headrest pushing part is arranged in front of the second headrest motor, the second headrest gear and the headrest up-down driving part, the longitudinal rack is two, the two longitudinal racks are arranged in interval, preferably left and right interval, the second headrest gear is two, each second headrest gear is engaged with one longitudinal rack, and a second headrest gear connecting rod 2335 is further arranged, the two second headrest gears are connected with the two ends of the second headrest gear connecting rod respectively, the second headrest gear connecting rod is rotationally connected with the rear headrest part, and the second headrest motor drives the second headrest gear connecting rod to rotate, thereby simultaneously driving the two second headrest gears to rotate, and the headrest pushing part is pushed to move forward and backward through the engagement of the second headrest gear and the longitudinal rack.

[0123] In this way, since the headrest pushing part is not directly connected with the front headrest part, the headrest pushing part and the front headrest part are connected by the gear to drive the rotation of the front headrest part, and the gear is arranged to enable the front headrest part to be stably held in the corresponding position after being pushed to the corresponding position, thereby ensuring the safety and comfort of use. In this embodiment, the gear 234 comprises a pushing piece 2340, two arc-shaped racks 2341, a tension spring 2342 and a reset piece 2343 (a tension spring can not be used), the reset piece is a reset spring or other structure with elastic reset force, the two arc-shaped racks are arranged at intervals on the left and right, the front ends of the arc-shaped racks are connected with the bottom rear side of the front headrest part, the rear end of the tension spring is hung with the rear headrest part, the front end is hung with the lower side of the front headrest part, and the tension spring always gives the rear pulling force to the bottom of the front headrest part. The rear end of the arc-shaped rack is movably arranged in the rear headrest part, the middle part of the pushing piece is rotatably connected with the front side below the headrest pushing part, the bottom of the pushing piece has two pushing teeth 2344 which can engage with the two arc-shaped racks respectively, the reset piece and the top of the pushing piece are located in front of the headrest pushing part, one end of the reset piece is connected with the top of the pushing piece, and the other end is connected with the front end of the headrest pushing part, the reset piece gives the pushing piece a forward pushing force, drives the pushing piece to rotate around the headrest pushing part, the top of the pushing piece is away from the front side of the headrest pushing part, and the pushing teeth are abutted on the lower front side wall of the headrest pushing part.

[0124] The bottom of the pushing tooth is an arc surface, and the top surface of the arc-shaped rack has a plurality of convex teeth 2345 arranged from front to back. The pushing tooth is between adjacent convex teeth of the arc-shaped rack. In the initial state, the pushing tooth is in front of the frontmost convex tooth. When the bottom of the front headrest part needs to be pushed away from the rear headrest part, the second headrest motor drives the headrest pushing part and the pushing piece to move backward through the second headrest gear and the longitudinal rack. In this process, the arc surface of the bottom of the pushing tooth is in contact with the convex tooth, and the convex tooth presses the pushing tooth. Due to the presence of the reset piece, the pushing piece rotates around the headrest pushing part (the bottom of the pushing piece rotates forward, and the top rotates backward), and the reset piece is compressed, and the pushing tooth can move backward to between the two adjacent convex teeth at the rear side. When the pushing tooth moves to between the two adjacent convex teeth at the rear side, the bottom of the pushing piece rotates backward and the top rotates forward due to the presence of the reset piece, and the pushing tooth enters between the two convex teeth and abuts against the rear side wall of the convex tooth at the front side. Then the pushing part moves forward, which drives the pushing piece to move forward, pushes the arc-shaped rack to move forward through the pushing tooth, and then drives the bottom of the front headrest part to rotate forward, so that the top of the front headrest part rotates around the rear headrest part by one tooth pitch (it can also be the length between 2 or 3 convex teeth or the length between more convex teeth: one tooth pitch is the length between two adjacent convex teeth). If more distance needs to be moved, after the arc-shaped rack moves forward by a distance driven by the headrest pushing part, the headrest pushing part continues to move backward by a predetermined distance. When the pushing piece moves backward, it has a certain downward pressure on the arc-shaped rack, and the downward pressure is greater than the tension of the tension spring, so that the arc-shaped rack does not move. Then, when the pushing tooth of the pushing piece enters behind the convex tooth at the rear side, the pushing tooth limits the movement of the arc-shaped rack backward. Then the headrest pushing part drives the pushing piece to move forward, drives the bottom of the front headrest part to move forward, and so on, until the best position or the required adjustment position is reached. The maximum rotation angle of the front headrest part is that the pushing tooth is clamped into the rear side of the last convex tooth. Of course, the headrest pushing part can directly drive the pushing tooth to move to the rear side of the last convex tooth when it moves backward, and then move forward by a predetermined distance according to the required adjustment position. The arc-shaped pushing tooth is coaxial with the rotating connection between the pushing piece and the headrest pushing part, so that the distance between the pushing tooth and the convex tooth to be contacted is equal when the pushing tooth is in contact with each convex tooth.

[0125] In this embodiment, a disengagement slope 2346 is arranged below and at the rear side of the pushing piece, which is arranged downwardly and rearwardly inclined, and when the front side headrest part needs to be reset, that is, the pushing teeth disengage from the gear pitch, the bottom of the front side headrest part is pulled rearward by the tension of the tension spring to move close to the rear side headrest part. The second headrest motor drives the headrest pushing part and the pushing piece to move rearward, so that the disengagement slope and the rear side headrest part are in contact, and continue to move a certain distance, and the rear side headrest part continues to press the disengagement slope (the rear side headrest part has a disengagement piece opposite to the disengagement slope, which presses the disengagement slope), and the pushing teeth at the bottom of the pushing piece are completely disengaged from the convex teeth of the arc-shaped gear rack upwardly. At this time, the pushing teeth will not give downward pressure to the arc-shaped gear rack, nor will it limit its rearward movement. Due to the existence of the tension spring, the recovery force of the tension spring will pull the front side headrest part to move rearward and reset. Of course, the tension spring can also not be arranged, and the passenger can push the front side headrest part to move rearward by the headrest force when the head is rested on the front side headrest part. In this structure, the existence of the gear positioner can stably stay at the position after the position of the front side headrest part is adjusted, which ensures the comfort and stability of use. In the utility model, the gear positioner can also adopt other existing and conventional gear positioners (for example, the gear positioner structure in the application numbers "202322213116.0, 202421950357.1" or similar structures), and the above-mentioned gear positioner structure can be not used, which can ensure that the front side headrest part is stably limited. The first structure can also be used without using the gear positioner.

[0126] Referring to Figure 7 As shown in the figure, the front side headrest part 232 includes a middle headrest 2320 and two side headrests 2321, the rear end top of the middle headrest 2320 is rotationally connected with the top front side of the rear side headrest part 231, the two side headrests 2321 are symmetrically arranged on both sides of the middle headrest 2320, and the inner ends of the two side headrests 2321 are rotationally connected with both sides of the middle headrest 2320 through damping parts; the headrest rotation driving part 233 drives the middle headrest 2320 to rotate around the rear side headrest part 231.

[0127] In the embodiment, the damping component preferably adopts a damping hinge, and the damping force is 30N-65N. Preferably, the damping force of the outer end of the side headrest rotating forward is about 30N-35N, and the damping force of the side headrest rotating towards the rear headrest part is about 60N-65N. In this way, the damping force of the damping component rotating in two directions is different, and when the outer end of the side headrest rotates towards the middle headrest part (when the outer end of the side headrest moves away from the rear headrest part), the included angle between the two side headrests is reduced, which plays a wrapping role. In this way, the headrest can wrap the head or wrap and limit the neck of the passenger, so that the head and neck of the passenger are not easy to separate from the headrest when the passenger uses it, especially when sleeping, thereby improving the comfort. Therefore, when the side headrest rotates towards the middle headrest, the damping force is smaller, which is convenient for the user to rotate the side headrest and saves labor. When the head or neck of the passenger is against the side headrest after being rotated, the supporting force is transmitted to the side headrest, the reverse damping force is larger, which can prevent the side headrest from suddenly rotating towards the rear headrest part, prevent the expansion of the side headrest during use, and improve the comfort and safety of use.

[0128] The headrest also has a sound box. It can play music or other sounds, and has stronger functions.

[0129] In the embodiment, the front end of the arc-shaped rack and the front end of the tension spring are connected with the middle headrest. When the middle headrest is driven to rotate around the rear headrest part, the side headrest will rotate together with the rotation of the middle headrest (if the headrest connecting rod structure is adopted, the headrest connecting rod is connected with the middle headrest).

[0130] Cushion assembly:

[0131] Referring to Figure 1 、 14 As shown in FIG. 25, the seat cushion assembly 1 is slidably arranged on the seat cushion slide rail 11, and the seat cushion assembly 1 comprises a seat cushion frame 12 and a seat cushion 13 slidably arranged on the seat cushion frame 12.

[0132] The seat cushion frame 12 is provided with a seat cushion guide part 120, which is arranged obliquely upward from back to front. The lower part of the seat cushion 13 is slidably connected with the seat cushion guide part 120.

[0133] A seat cushion driving part is further arranged, which drives the seat cushion 13 to move along the seat cushion guide part.

[0134] In the prior art, for height adjustment of the seat cushion, two motors are generally used, one front motor and one rear motor. When the height is adjusted, the front motor works to push the front side of the seat cushion upward or downward, so that the seat cushion rotates around the rear end and the front end of the seat cushion is raised or lowered. When the rear motor works, it drives the seat cushion and the waist support to rise or fall as a whole, thereby achieving the height adjustment of the seat cushion. In this way, the adjustment effect is not good, because when the passenger sits on the seat cushion, the most comfortable state is that the seat cushion abuts against the passenger's thighs and the front end of the seat cushion is close to the shins, and the shins are as close as possible to the front side of the seat cushion, so that the comfort of the ride is best. However, the existing double-motor (front motor and rear motor) adjustment of the seat cushion height cannot guarantee the fit of the seat cushion and the legs, and it is difficult to guarantee the best comfort.

[0135] In the present embodiment, a seat cushion part driving member (not shown in the figure) for driving the seat cushion frame to move along the seat cushion slide rail can also be provided on the seat cushion frame. The seat cushion is installed on the seat cushion frame, and the seat cushion part driving member is installed on the seat cushion frame, which can drive the seat cushion frame to move forward and backward along the seat cushion slide rail, thereby realizing the forward and backward movement of the seat cushion assembly. In the present embodiment, the top surface of the seat cushion is inclined upward from back to front. When the passenger sits on the seat cushion, the thighs are fitted on the top surface of the seat cushion, and the front side of the seat cushion is as close as possible to the shins, and the front top of the seat cushion is also as close as possible to the knees, thereby guaranteeing the comfort of the passenger's ride. When the height of the seat cushion needs to be adjusted, the seat cushion driving part drives the seat cushion to move along the seat cushion guide part. Since the seat cushion guide part is inclined upward from back to front, when the seat cushion moves forward, the whole seat cushion also rises obliquely upward. At this time, when the passenger sits on the seat cushion, the top of the seat cushion is fitted on the thighs, and the front side of the seat cushion is as close as possible to the knees, so that the fit of the seat cushion and the passenger's legs is good, the comfort of the passenger sitting on the seat cushion is good, and the setting of one motor can be reduced, thereby reducing the cost.

[0136] Referring to Figures 14-18 As shown in the figure, the seat cushion driving part includes a seat cushion driving member 140, a seat cushion front side connecting member 141 and a seat cushion rear side connecting member 142. The seat cushion driving member 410 is installed on the seat cushion frame 12.

[0137] The top of the seat cushion front side connecting member 141 and the seat cushion rear side connecting member 142 is installed on the seat cushion bottom, and the bottom of the seat cushion front side connecting member 141 is rotatably connected to the seat cushion frame 13 on both sides, and the bottom of the seat cushion rear side connecting member 142 is rotatably connected to the seat cushion frame 13 on both sides.

[0138] The cushion driving member 140 is installed on the cushion frame 13, and is configured to drive the cushion front connecting member 141 or the cushion rear connecting member 142 to rotate around the cushion frame 13, and to drive the cushion 13 to move forward and backward along the cushion guide part 120.

[0139] In the embodiment, the cushion driving member is connected with the cushion front connecting member, and the bottom of the cushion front connecting member and the bottom of the cushion rear connecting member are respectively connected with the cushion frame to rotate, when the cushion driving member drives the cushion front connecting member, the bottom of the cushion front connecting member is driven to rotate around the cushion frame, and the cushion rear connecting member is also driven to rotate around the cushion frame, when the bottom of the cushion front connecting member and the bottom of the cushion rear connecting member rotate around the cushion frame, the top of the cushion front connecting member and the top of the cushion rear connecting member move toward the upper front or the lower rear relative to the cushion frame, and the cushion is driven to move forward and backward along the cushion guide part, the forward and backward oblique sliding of the cushion is realized, and the cushion is lifted or lowered.

[0140] Referring to Figure 16 As shown in the figure, the cushion guide part 120 is arranged at the rear end of the cushion driving part, the cushion guide part 120 is two, and the two cushion guide parts 120 are symmetrically arranged at the rear end of the cushion frame 12, the two ends of the rear bottom of the cushion 13 are respectively connected with the two groups of cushion guide parts 120 to slide, and the two ends of the rear bottom of the cushion 13 are respectively connected with the two side cushion guide parts 120 to rotate.

[0141] In the embodiment, the cushion guide part can adopt a guide rail or a sliding groove, in the embodiment, the cushion guide part is a sliding groove, the rear bottom of the cushion is provided with a cushion connecting plate 130, and a sliding block 1201 is arranged in each cushion guide part 120 to slide, and the two ends of the cushion connecting plate are respectively connected with the sliding blocks in the two side cushion guide parts to rotate, in this structure, when the cushion driving member drives the cushion front connecting member and the cushion rear connecting member to rotate around the cushion frame, the front end of the cushion will move toward the upper front or the lower rear, and the cushion will also change the angle, therefore, the two ends of the cushion connecting plate are respectively connected with the sliding blocks in the two side cushion guide parts to rotate, so as to ensure that the cushion can obliquely slide forward and backward along the cushion guide part, and also ensure that the cushion can change the angle by a small angle when the angle of the cushion changes, and the normal rotation of the cushion is ensured. At the same time, the cushion, the cushion frame, the cushion front connecting member, and the cushion rear connecting member form a parallelogram structure, and the rear end of the cushion is connected with the cushion guide part, so that the position of the cushion does not change when the cushion bears a large weight (when the passenger sits on the cushion), and the stability and firmness of the cushion during use are ensured.

[0142] Referring to Figure 17 , 18As shown, the front side connecting piece 141 of the cushion includes a front side connecting pipe 1410 and front side connecting plates 1411 arranged at both ends of the front side connecting pipe 1410, the front side connecting pipe 1410 is rotatably connected with the cushion 13, and the bottom of the front side connecting plates 1411 is rotatably connected with the front end of the cushion frame 12.

[0143] The top of the front side connecting plate is fixedly connected with the front side connecting pipe, and the cushion driving member is connected with the front side connecting pipe, so that the front side connecting pipe is pushed to rotate around the cushion frame through the front side connecting plate, thereby driving the cushion to move forward and upward or backward and downward. In the embodiment, the rear side connecting piece of the cushion includes two rear side connecting plates arranged at intervals, the top of the rear side connecting plate is rotatably connected with the cushion, and the bottom of the rear side connecting plate is rotatably connected with the cushion frame (or the rear side connecting piece of the cushion includes a rear side connecting pipe and two rear side connecting plates arranged at both ends of the rear side connecting pipe, and both ends of the rear side connecting pipe are rotatably connected with the cushion). In this way, when the front side connecting piece of the cushion rotates around the cushion frame, the rear side connecting plate also rotates around the cushion frame, thereby stably supporting the rotation and movement of the cushion.

[0144] Referring to Figure 15 , 17 As shown, the cushion driving member 140 includes a cushion driving motor 1401, a cushion driving screw rod 1402 and a cushion driving screw rod support 1403, the cushion driving motor 1401 and the cushion driving screw rod support 1403 are installed on the cushion frame 12, the middle part of the cushion driving screw rod 1402 is screwed with a cushion driving screw nut in the cushion driving screw rod support 1403, and the cushion driving motor 1401 is configured to drive the rotation of the cushion driving screw nut.

[0145] The bottom of the front side connecting pipe 1410 is provided with a front side connecting plate 1412, and the front end of the cushion driving screw rod 1402 is rotatably connected with the front side connecting plate 1412.

[0146] In this embodiment, the seat cushion drive screw bracket can be fixedly installed on the seat cushion frame. The seat cushion drive screw is obliquely positioned, and its movement trajectory is a straight line. When the front connecting piece of the seat cushion rotates, since the front connecting tube and the seat cushion are rotatably connected, it is possible to ensure that the movement trajectory of the front connecting plate coincides with the movement trajectory of the seat cushion drive screw. When the seat cushion drive motor drives the seat cushion drive screw nut to rotate, the seat cushion drive screw nut will cause the seat cushion drive screw to extend and retract. When the seat cushion drive screw extends and retracts, it can drive the front connecting plate to move back and forth. While it moves back and forth, it will push the front connecting piece of the seat cushion to rotate around the seat cushion frame, and the front connecting tube will also rotate relative to the seat cushion, ensuring that the connection between the front connecting plate and the seat cushion drive screw is always on the movement trajectory of the seat cushion drive screw. When the front end of the seat drive screw extends (moves forward), it pushes the top of the front and rear seat connectors to rotate upward and forward, causing the seat to move diagonally forward and rise. When the front end of the seat drive screw retracts (moves backward), it drives the top of the front and rear seat connectors to rotate downward and backward, causing the seat to move diagonally backward and fall.

[0147] Footrest:

[0148] The footrest is mainly used to support the passenger's knees and feet below the knees.

[0149] See Figure 1 , 19 As shown in Figure 25, a footrest 4 is rotatably mounted on the front end of the seat cushion 13, and the top of the footrest 4 is rotatably connected to the front end of the seat cushion 13; a footrest drive unit 41 is provided under the seat cushion, and the footrest drive unit 41 drives the footrest 4 to rotate around the seat cushion, and causes the footrest 4 to unfold or retract.

[0150] See Figures 20-25 As shown, the bottom surface of the footrest part 4 is provided with a footrest connecting shaft 42, and the footrest driving part 41 is connected to the footrest connecting shaft 42 via a transmission mechanism 43;

[0151] The transmission mechanism 43 includes a transmission component 430, the front end of which is rotatably connected to the footrest coupling 42. The driving end of the footrest drive unit 41 is connected to the transmission component 430. The extension and retraction of the driving end of the footrest drive unit 41, via the transmission component and the footrest coupling, drive the footrest part to rotate around the seat cushion. In this manner, when the footrest drive unit pushes the transmission component to move, it can drive the footrest part to rotate around the seat cushion.

[0152] Further, in this structure, there is a deficiency: if the foot support part is unfolded (in the unfolded state, the foot support part is basically parallel to the top surface of the cushion, used to support the shanks and feet of the passengers; in the storage state, the foot support part is basically perpendicular to the top surface of the cushion, the bottom of the foot support part is close to the front end of the cushion or in contact with the front end of the cushion), the top of the foot support part is stepped on by too large a force, for example, an adult directly steps on it (the entire body weight is on the foot support part) or a child jumps on it, which is likely to cause damage to the connection between the foot support part and the cushion, the connection between the transmission member and the foot support driving part.

[0153] Therefore, in order to solve the above technical problems, referring to Figures 21-25 As shown in the figure, a recess 4301 is arranged on the transmission member 430, and the foot support connecting shaft 42 is rotatably arranged in the recess 4301 and can move along the recess 4301.

[0154] Further, a limiting member 431 and a tension spring 432 are arranged, the middle part of the limiting member 431 is rotatably connected to the rear end of the bottom of the transmission member 430, a limiting groove 4310 is arranged on the top of the front end of the limiting member 431, and the two ends of the tension spring 432 are respectively connected to the transmission member 430 and the limiting member 431. The tension spring 432 rotates the limiting member 431 towards the first direction and makes the limiting groove 4310 abut against the outer surface of the bottom of the foot support connecting shaft 42, and the limiting groove 4310 pushes the top of the foot support connecting shaft 42 against the top surface of the recess 4301.

[0155] In this embodiment, the extension and retraction of the driving end of the foot support driving part drives the foot support part to rotate around the cushion through the transmission member and the foot support connecting shaft. The retraction of the driving end of the foot support driving part drives the rear movement of the transmission member, and at the same time drives the foot support part to rotate around the cushion towards one direction, drives the bottom of the foot support part to rotate close to the front end of the cushion, and makes the front end of the foot support part close to the cushion, until the front end of the foot support part is close to or in contact with the front side of the cushion, to realize the storage of the foot support part. When the foot support part needs to be unfolded, the driving end of the foot support driving part is extended to push the front movement of the transmission member, and when the transmission member moves forward, it will push the foot support part to rotate around the cushion towards the other direction, drive the bottom of the foot support part to rotate away from the front end of the cushion, and make the front end of the foot support part away from the cushion, so that the foot support part is rotated to be basically parallel to the top surface of the cushion, thereby realizing the unfolding of the foot support part.

[0156] In the embodiment, due to the existence of the limiting member and the tension spring, the tension spring pulls the limiting member to rotate towards the first direction, for example, the first direction is the clockwise direction, so that the limiting groove is abutted against the bottom outer surface of the foot support connecting shaft, and gives the foot support connecting shaft an upward pushing force, so that the top outer surface of the foot support connecting shaft is abutted against the top surface of the groove. Since the rotating connection position of the limiting member and the transmission member to the groove does not change, in the embodiment, when the bottom outer surface of the limiting groove and the foot support connecting shaft are in contact, and the top outer surface of the foot support connecting shaft is pushed by the limiting member to abut against the top surface of the groove, at this time, the foot support connecting shaft is at the front end of the groove, during the process that the foot support driving part drives the transmission member to move forward and drives the foot support to expand, the clamping force of the limiting member and the transmission member to the foot support connecting shaft is greater than the pushing force of the foot support connecting shaft to the limiting groove, therefore, when the transmission member moves forward, the limiting member and the transmission member synchronously push the foot support connecting shaft to move and drive the foot support part to rotate and expand. At this time, the foot support part can bear a certain weight, when the foot support part in the expanded state is subjected to a large external force (a direct and complete external force of stepping on, which may cause damage to the foot support driving part, the transmission member or the connection part), in the conventional state, the foot support driving part, the transmission member or the connection part is damaged, but in the embodiment, when the foot support part in the expanded state is subjected to a large external force, the external force is transmitted to the foot support connecting shaft, since the top of the foot support part (the rear side of the foot support part in the expanded state) is rotationally connected to the front end of the cushion, the foot support connecting shaft is below the connection part of the foot support part and the cushion (the foot support connecting shaft is in front of the connection part of the foot support part and the cushion in the expanded state), the foot support connecting shaft has a downward pushing force towards the rear, which can press the limiting groove, due to the existence of the tension spring, the limiting member is pushed to rotate towards the second direction, the tension spring is further stretched, until the foot support connecting shaft moves rearward to separate from the limiting groove, and moves along the groove rearward, during the process, the foot support part rotates towards the storage direction, so that the foot support part is inclined, therefore, the external force cannot directly press on the foot support part, so as to prevent damage to the foot support part, the transmission member and the foot support driving part. When the foot support part needs to be reset (restored to the original state), the bottom of the foot support part is turned upwards towards the front, so that the foot support connecting shaft moves forward along the groove (after the foot support connecting shaft separates from the limiting groove, the tension spring further pulls the foot support connecting shaft to rotate towards the first direction, so that the front end of the limiting member is at the front end of the foot support connecting shaft), the foot support connecting shaft collides with the limiting member and presses the limiting member, so that the limiting member rotates towards the second direction (the rotating direction of the second direction is opposite to that of the first direction), until the foot support connecting shaft rotates to the limiting groove, the limiting groove of the limiting member is clamped into the bottom of the foot support connecting shaft, so as to limit the foot support connecting shaft, and reset the foot support part. In the structure, the damage to the foot support part can be effectively prevented, the maintenance rate is reduced, and the service life is prolonged.

[0157] In the embodiment, the foot support driving part is arranged beside the cushion driving member.

[0158] Referring to Figure 22 ,25 As shown, the front end of the limiting member 431 has an upwardly extending front protrusion 4311, and the middle part of the top surface of the limiting member 431 has a central protrusion 4312. The limiting groove 4310 is formed above the limiting member 431 between the front protrusion 4311 and the central protrusion 4312. The tension spring 432 pulls the limiting member 431 to rotate in the first direction, and the limiting groove 4310 abuts against the bottom outer surface of the foot support connecting shaft 42. The front and rear sides of the central protrusion are both arc-shaped surfaces, which facilitates the foot support connecting shaft to move backward through the central protrusion and disengage from the limiting groove, thereby preventing damage to the foot support due to force. It also facilitates the foot support connecting shaft to enter the limiting groove through the central protrusion, realizing the reset of the foot support and the transmission component.

[0159] See Figures 21-25 As shown, the front end of the limiting member 431 is located below the foot support connecting shaft 42. One end of the tension spring 432 is connected to the bottom front end of the transmission member 430, and the other end of the tension spring 432 is connected to the rear end of the limiting member 431. The tension spring 432 pulls the limiting member 431 to rotate in the first direction and causes the limiting groove 4310 to abut against the bottom outer surface of the foot support connecting shaft 42.

[0160] The middle part of the limiting component is rotatably connected to the transmission component. Its front end is used for limiting the foot support shaft, and its rear end is used for connecting the tension spring.

[0161] See Figures 21-23 As shown, the footrest 4 is provided with a connecting arm 44, and the two rear ends of the connecting arm 44 are respectively rotatably connected to the front end of the seat cushion 13.

[0162] The connecting arm 44 has a connecting protrusion 440 in the middle, and the foot support shaft 42 is located at the rear end of the connecting protrusion 440.

[0163] In this embodiment, the connecting arm 44 has an "I"-shaped structure, including a left arm 441, a right side wall 442, and a middle connecting tube 443. The two ends of the middle connecting tube are connected to the middle of the left and right arms, respectively. The front ends of the left and right arms are connected to the footrest, respectively. The rear ends of the left and right arms are rotatably connected to the front sides of the seat cushion. The front end of the connecting protrusion is perpendicularly connected to the middle of the middle connecting tube. In this embodiment, the transmission component has a downward-opening U-shaped structure with two grooves located on the side walls of the transmission component on both sides of the opening. The two ends of the footrest connecting shaft are located within the two grooves. The front end of the limiting component is located within the opening, and the rear end of the limiting component is located outside the rear side of the transmission component. The rear end of the tension spring is also located below the transmission component.

[0164] See Figures 20-25As shown, the foot support driving part 41 comprises a foot support driving motor 410, a foot support screw rod 411 and a foot support screw rod support 412, the foot support screw rod support 412 and the foot support driving motor 410 are installed on the cushion bottom surface 13, and the foot support screw rod support 412 is fixedly connected or rotatably connected with the cushion 13, the foot support screw rod 411 is screwed with a foot support screw rod nut inside the foot support screw rod support 412, the foot support driving motor 410 is configured to drive the foot support screw rod nut to rotate, and the front end of the foot support screw rod 412 is connected with the transmission part 430.

[0165] In the embodiment, the foot support screw rod is screwed with the foot support screw rod nut inside the foot support screw rod support (the foot support screw rod nut is rotatably installed inside the foot support screw rod support), when the foot support driving motor drives the foot support screw rod nut to rotate, the foot support screw rod nut will synchronously drive the foot support screw rod to move forward and backward, thereby pushing the transmission part to move forward and backward, and further driving the foot support part to rotate, so as to realize the unfolding and storage of the foot support part.

[0166] The length of the groove is greater than the diameter of the foot support connecting shaft, and the width of the groove is greater than or equal to the diameter of the foot support connecting shaft. Preferably, the width of the groove is slightly greater than the diameter of the foot support connecting shaft, or the width of the groove and the diameter of the foot support connecting shaft are matched, so that the foot support connecting shaft cannot shake in the groove.

[0167] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0168] In the utility model, unless another definite provision and limitation, the term " install", " link", " connect", " fixed" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, for example, two through abutment, contact and so on form mechanical abutment or contact connection mode, two also can be directly hung or through intermediate medium hang up and so on, also can be two element internal communication or two element's interaction relationship. For ordinary skilled person in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

Claims

1. A car seat, characterized in that: It includes a seat cushion assembly and a backrest assembly with a split structure, wherein the backrest assembly is mounted on a crossbeam; The seat cushion assembly is located on the lower front side of the backrest assembly; The backrest assembly includes a chair back, a backrest, and a headrest; It also includes a chair back drive unit and a backrest drive unit, wherein the backrest is located on the front side of the chair back, and the backrest drive unit drives the bottom of the backrest to rotate around the chair back or crossbeam. The chair back drive unit drives the bottom of the chair back to rotate around the crossbeam. When the chair back rotates, the backrest rotates synchronously with the chair back. The headrest is mounted on the top of the backrest.

2. The car seat according to claim 1, characterized in that: The bottom of the seat cushion assembly is slidably mounted on the seat cushion slide rail; the seat cushion assembly includes a seat cushion frame and a seat cushion slidably mounted on the seat cushion frame; the seat cushion frame is provided with a seat cushion guide, the seat cushion guide is inclined upward from back to front, and the bottom of the seat cushion is slidably connected to the seat cushion guide; It also includes a seat cushion drive unit, which drives the seat cushion to move along the seat cushion guide portion.

3. The car seat according to claim 2, characterized in that: The seat cushion driving unit includes a seat cushion driving component, a front seat cushion connector, and a rear seat cushion connector. The seat cushion driving component is mounted on the seat cushion frame. The top of the front and rear connecting parts of the seat cushion are installed on the bottom of the seat cushion. The bottom two sides of the front connecting part are rotatably connected to the seat cushion bracket, and the bottom two sides of the rear connecting part are rotatably connected to the seat cushion bracket. The seat cushion drive is mounted on the seat cushion bracket. The seat cushion drive is configured to drive the front or rear seat cushion connector to rotate around the seat cushion bracket and move the seat cushion back and forth along the seat cushion guide.

4. The car seat according to claim 1, characterized in that: The front end of the seat cushion assembly is also rotatably mounted with a footrest. A footrest drive unit is provided below the seat cushion assembly. The footrest drive unit drives the footrest to rotate around the seat cushion assembly and causes the footrest to unfold or retract.

5. The car seat according to claim 4, characterized in that: The bottom surface of the footrest is provided with a footrest connecting shaft, and the footrest drive unit is connected to the footrest connecting shaft via a transmission mechanism; The transmission mechanism includes a transmission component, the front end of which is rotatably connected to the footrest via a connecting shaft. The driving end of the footrest driving part is connected to the transmission component. The extension and retraction of the driving end of the footrest driving part drive the footrest part to rotate around the seat cushion assembly via the transmission component and the footrest connecting shaft.

6. The car seat according to claim 5, characterized in that: The transmission component has a groove, the foot support shaft is rotatably connected to the groove, and the foot support shaft can move along the groove; It also includes a limiting member and a tension spring. The middle part of the limiting member is rotatably connected to the rear end of the bottom of the transmission member. The front end of the limiting member is provided with a limiting groove. The two ends of the tension spring are respectively connected to the transmission member and the limiting member. The tension spring pulls the limiting member to rotate in the first direction and makes the limiting groove abut against the bottom outer surface of the foot support shaft.

7. The car seat according to claim 6, characterized in that: The limiting member has an upwardly extending front protrusion at its front end and a central protrusion at the center of its top surface. The limiting groove is formed above the limiting member between the front protrusion and the central protrusion. The tension spring pulls the limiting member to rotate in the first direction and causes the limiting groove to abut against the bottom outer surface of the foot support shaft.

8. The car seat according to claim 1, characterized in that: The chair back drive unit includes a chair back motor and a first gear. The chair back motor and the first gear are mounted on the chair back. A first toothed plate is mounted on the crossbeam. The first gear meshes with the first toothed plate. The chair back motor drives the first gear to rotate and causes the chair back to rotate around the crossbeam.

9. The automobile seat according to claim 8, characterized in that: A first connecting gear is also rotatably mounted on the chair back. One side of the first connecting gear meshes with the first gear, and the other side of the first connecting gear meshes with the first toothed plate.

10. The automobile seat according to claim 1, characterized in that: The backrest drive unit includes a second motor, a second gear and a second gear plate, wherein the second gear meshes with the second gear and the second motor drives the second gear to rotate. The second toothed plate is mounted on the chair back, and the second motor is mounted on the backrest. When the second motor drives the second gear to rotate, it causes the bottom of the backrest to rotate around the chair back. Alternatively, the second toothed plate is mounted on the backrest, and the second motor is mounted on the chair back. When the second motor drives the second gear to rotate, it causes the bottom of the backrest to rotate around the chair back.

11. The car seat according to claim 1, characterized in that: The headrest is mounted on the top of the backrest via at least two headrest rods, and the headrest is movable up and down relative to the headrest rods.

12. The automobile seat according to claim 11, characterized in that: The headrest is provided with a headrest up-and-down driving part that drives the headrest to move up and down along the headrest rod. The headrest up-and-down driving part includes a first headrest motor and a first headrest gear installed in the headrest. At least one headrest rod is provided with a headrest rod rack. The headrest rod rack is arranged along the length direction of the headrest rod. The first headrest gear meshes with the headrest rod rack. The first headrest motor drives the first headrest gear to rotate, and the headrest moves up and down relative to the headrest rod through the headrest rod rack.

13. The automobile seat according to claim 12, characterized in that: The headrest includes a rear headrest portion and a front headrest portion. The rear headrest portion is mounted on the headrest rod. The top rear side of the front headrest portion is rotatably connected to the top front side of the rear headrest portion. The headrest up-down drive portion is installed inside the rear headrest. And / or, the rear headrest portion is further provided with a headrest rotation drive portion for driving the front headrest portion to rotate around the rear headrest portion.

14. The automobile seat according to claim 13, characterized in that: The front headrest includes a central headrest and two side headrests. The top rear end of the central headrest is rotatably connected to the front top of the rear headrest. The two side headrests are symmetrically arranged on both sides of the central headrest. The inner end of each side headrest is rotatably connected to the side of the central headrest via a damping component. The headrest rotation drive unit drives the central headrest to rotate around the rear headrest.

15. The automobile seat according to claim 1, characterized in that: The side wall of the seat back is provided with a locking limiter, which can limit the seat back to be positioned on the vehicle.

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