阅读说明：本技术 一种可折叠汽车座椅 (Foldable automobile seat ) 是由 不公告发明人 于 2021-02-22 设计创作，主要内容包括：本发明公开了一种可折叠汽车座椅,包括汽车底板,所述汽车底板的上表面固定连接有支撑座,所述支撑座的上方设置有座椅本体,且所述座椅本体的下表面两侧通过设置移动机构与支撑座相连接,所述座椅本体的一侧两端对称固定连接有弹簧片,所述弹簧片的顶端固定连接有座椅靠背,所述座椅靠背的底部通过设置调节机构与支撑座相连接,所述座椅靠背内部设置有支撑块,所述支撑块的四角处均设置有传动轮,且位于上方或下方的两个所述传动轮之间固定连接有连接杆,且所述连接杆与支撑块为转动配合,位于同侧的两个所述传动轮的外表面套装有传动带,且所述传动轮与传动带为转动配合,本发明有利于调节座椅的软硬程度,提高舒适度。(The invention discloses a foldable automobile seat, which comprises an automobile bottom plate, wherein a supporting seat is fixedly connected to the upper surface of the automobile bottom plate, a seat body is arranged above the supporting seat, two sides of the lower surface of the seat body are connected with the supporting seat through a moving mechanism, two ends of one side of the seat body are symmetrically and fixedly connected with spring pieces, a seat back is fixedly connected to the top ends of the spring pieces, the bottom of the seat back is connected with the supporting seat through an adjusting mechanism, a supporting block is arranged inside the seat back, driving wheels are arranged at four corners of the supporting block, a connecting rod is fixedly connected between the two driving wheels positioned above or below the supporting block and is in rotating fit with the supporting block, a driving belt is sleeved on the outer surfaces of the two driving wheels positioned at the same side, and the driving wheels and the, the invention is beneficial to adjusting the hardness degree of the seat and improving the comfort level.)

1. A foldable car seat, comprising a car floor (1), characterized in that: the upper surface of the automobile bottom plate (1) is fixedly connected with a supporting seat (26), a seat body (2) is arranged above the supporting seat (26), two sides of the lower surface of the seat body (2) are connected with the supporting seat (26) through a moving mechanism, two ends of one side of the seat body (2) are symmetrically and fixedly connected with spring pieces (27), the top end of each spring piece (27) is fixedly connected with a seat backrest (6), the bottom of each seat backrest (6) is connected with the supporting seat (26) through an adjusting mechanism, supporting blocks (19) are arranged in the seat backrest (6), driving wheels (17) are arranged at four corners of each supporting block (19), a connecting rod (42) is fixedly connected between the two driving wheels (17) above or below, and the connecting rods (42) are in rotating fit with the supporting blocks (19), the outer surfaces of the two driving wheels (17) positioned at the same side are sleeved with a driving belt (18), the transmission wheel (17) is in running fit with the transmission belt (18), the two sides of the supporting block (19) are symmetrically and fixedly connected with connecting plates (16), the two connecting plates (16) are respectively and fixedly connected with the inner walls of the two sides of the seat backrest (6), one end of one of the driving wheels (17) is provided with a driving mechanism, the top end and the bottom end in the seat back (6) are fixedly connected with filling blocks (12), a plurality of hard plates (15) and soft plates (21) are respectively arranged on two sides of the supporting block (19), one end of each of the hard plate (15) and the soft plate (21) is connected with the transmission belt (18) through a connecting mechanism, the chair back is characterized in that connecting blocks (5) are symmetrically and fixedly connected to the two sides of the top end of the chair back (6), and a back cushion (4) is fixedly connected to the top end of each connecting block (5).

2. A foldable car seat according to claim 1, characterized in that: the moving mechanism comprises sliding blocks (31) which are symmetrically and fixedly connected to two sides of the lower surface of the seat body (2), two sides of the upper surface of the supporting seat (26) are provided with second sliding chutes (32) matched with the sliding blocks (31), the sliding blocks (31) are arranged in the second sliding chutes (32) and are in sliding fit with the second sliding chutes, two sides of the supporting seat (26) are symmetrically and fixedly connected with an outer cover body (8), the lower surface of the outer cover body (8) is fixedly connected with the upper surface of the automobile bottom plate (1), a second hydraulic cylinder (35) is arranged in the outer cover body (8), one end of the second hydraulic cylinder (35) is fixedly connected with the inner wall of one side of the outer cover body (8), the other end of the second hydraulic cylinder (35) is fixedly connected with a sliding plate (33), the side walls of the outer cover body (8) and the supporting seat (26) are both provided with third sliding chutes (34), one end of the sliding plate (33) penetrates through, and the sliding plate (33) is in sliding fit with the third sliding chute (34).

3. A foldable car seat according to claim 1, characterized in that: the adjusting mechanism comprises a rotating plate (28), one end of the rotating plate (28) is rotatably connected with the side wall of the seat back (6), the other end of the rotating plate (28) is fixedly connected with a second rotating shaft (29), the second rotating shaft (29) is rotatably embedded on the upper surface of the supporting seat (26), one end of the second rotating shaft (29) is fixedly connected with an output shaft of a first motor (30), and the first motor (30) is installed on the upper surface of the supporting seat (26).

4. A foldable car seat according to claim 1, characterized in that: the driving mechanism comprises a second gear (14), one end of the second gear (14) is fixedly connected with one end of one of the driving wheels (17), a first gear (13) is arranged above the second gear (14), the first gear (13) is meshed with the second gear (14), one end of the first gear (13) is fixedly connected with an output shaft of a second motor (39), and one end of the second motor (39) is fixedly installed in the filling block (12).

5. A foldable car seat according to claim 1, characterized in that: the connecting mechanism comprises a transverse plate (25), two ends of the transverse plate (25) are fixedly connected with side walls of two transmission belts (18) respectively, a movable plate (22) is inserted in the center of the side wall of the transverse plate (25), the movable plate (22) is in sliding fit with the transverse plate (25), a limiting plate (24) is fixedly connected with the side wall of one end of the movable plate (22), the side wall of the other end of the movable plate (22) is fixedly connected with the side wall of a hard plate (15) or a soft plate (21), sleeves (45) are fixedly connected with four corners of the side wall of one end of the transverse plate (25), telescopic columns (46) are inserted in the sleeves (45), the telescopic columns (46) are in sliding fit with the sleeves (45), one end of each telescopic column (46) is fixedly connected with the side wall of the hard plate (15) or the soft plate (21), and springs (47) are sleeved on the outer surfaces of, one end of the spring (47) is fixedly connected with the side wall of the transverse plate (25), and the other end of the spring (47) is fixedly connected with the side wall of the hard plate (15) or the soft plate (21).

6. A foldable car seat according to claim 5, characterized in that: square groove (41) have been seted up to the one end lateral wall of supporting shoe (19), be provided with push pedal (23) in square groove (41), push pedal (23) four corners fixedly connected with third pneumatic cylinder (40), the lateral wall in the one end fixed connection square groove (41) of third pneumatic cylinder (40), push pedal (23) one end lateral wall supports the lateral wall of limiting plate (24).

7. A foldable car seat according to claim 1, characterized in that: the utility model discloses a seat, including seat body (2), both ends symmetry fixedly connected with fixing base (10), one side of fixing base (10) is rotated through setting up first axis of rotation (7) and is connected handrail (3), the one end lower surface of handrail (3) is rotated and is connected the one end of first pneumatic cylinder (11), the other end of first pneumatic cylinder (11) inlays the dress at fixing base (10) top, fixing base (10) upper surface middle part has been seted up and has been accomodate groove (9).

8. A foldable car seat according to claim 2, characterized in that: seat body (2) below is provided with fixed plate (38), the both ends lateral wall of fixed plate (38) is the lateral wall of two slider of fixed connection (31) respectively, be provided with expansion bracket (36) between the upper surface of fixed plate (38) and the lower surface of seat body (2), just the four corners department of expansion bracket (36) all rotates the connection square through setting up cylinder (37), is located two of top the lower surface of square fixed connection seat body (2), the two that is located the below the upper surface of square sliding connection fixed plate (38).

9. A foldable car seat according to claim 2, characterized in that: first chutes (20) are symmetrically formed in two ends of the hard plate (15) and the soft plate (21), arc-shaped plates (44) are symmetrically and fixedly connected to two ends of one side, close to the seat body (2), of the seat back (6), a plurality of balls (43) are rotatably connected to side walls of the arc-shaped plates (44), and the balls (43) are in rotating fit with the first chutes (20).

Technical Field

The invention relates to the technical field of automobile seats, in particular to a foldable automobile seat.

Background

A car seat is a seat for sitting when sitting. The chair can be divided into a front-row chair and a rear-row chair according to parts, and specifically comprises a headrest, a backrest, a cushion, armrests and the like.

Most of the conventional automobile seats are foldable seats, and the purpose is to increase the using space of an automobile or provide a rest place for passengers.

The hardness degree of the existing seat backrest can not be adjusted, different people adapt to seats with different hardness due to personal physique, and the improper seat can cause discomfort of passengers in long-distance travel.

Disclosure of Invention

The invention aims to provide a foldable automobile seat to solve the problem that the hardness and softness of the seat cannot be adjusted in the prior art, which is provided by the background art, so that the body of a passenger is uncomfortable.

In order to achieve the purpose, the invention provides the following technical scheme: a foldable automobile seat comprises an automobile bottom plate, wherein a supporting seat is fixedly connected to the upper surface of the automobile bottom plate, a seat body is arranged above the supporting seat, two sides of the lower surface of the seat body are connected with the supporting seat through a moving mechanism, two ends of one side of the seat body are symmetrically and fixedly connected with spring pieces, a seat back is fixedly connected to the top ends of the spring pieces, the bottom of the seat back is connected with the supporting seat through an adjusting mechanism, supporting blocks are arranged inside the seat back, driving wheels are arranged at four corners of each supporting block, a connecting rod is fixedly connected between the two driving wheels above or below the supporting blocks and is in rotating fit with the supporting blocks, a driving belt is sleeved on the outer surfaces of the two driving wheels at the same side, and the driving wheels are in rotating fit with the, the supporting shoe bilateral symmetry fixedly connected with connecting plate, two the connecting plate respectively the both sides inner wall of fixed connection seat back, one of them the one end of drive wheel is provided with actuating mechanism, the equal fixedly connected with stuff block in top and bottom in the backrest, the supporting shoe both sides are provided with a plurality of hard board and soft board respectively, the one end of hard board and soft board all is connected with the drive belt through setting up coupling mechanism, the top bilateral symmetry fixedly connected with connecting block of backrest, connecting block top fixedly connected with back cushion.

Preferably, moving mechanism includes the slider of symmetry fixed connection in seat body lower surface both sides, the second spout with slider looks adaptation is seted up to supporting seat upper surface both sides, the slider is in the second spout and with it sliding fit, just supporting seat bilateral symmetry fixedly connected with dustcoat, the lower fixed surface of connecting the automobile bottom plate's of dustcoat upper surface, the dustcoat is internal to be provided with the second pneumatic cylinder, one side inner wall of the one end fixed connection dustcoat of second pneumatic cylinder, the other end fixedly connected with slide of second pneumatic cylinder, the dustcoat all has seted up the third spout with the lateral wall of supporting seat, the one end of slide is passed the third spout and is connected with the one end of slider, just the slide is sliding fit with the third spout.

Preferably, the adjusting mechanism comprises a rotating plate, one end of the rotating plate is rotatably connected with the side wall of the seat back, the other end of the rotating plate is fixedly connected with a second rotating shaft, the second rotating shaft is rotatably embedded on the upper surface of the supporting seat, one end of the second rotating shaft is fixedly connected with an output shaft of a first motor, and the first motor is installed on the upper surface of the supporting seat.

Preferably, the driving mechanism includes a second gear, one end of the second gear is fixedly connected to one end of one of the driving wheels, a first gear is arranged above the second gear, the first gear is meshed with the second gear, one end of the first gear is fixedly connected to an output shaft of the second motor, and one end of the second motor is fixedly mounted in the filling block.

Preferably, the connecting mechanism includes the diaphragm, the both ends of diaphragm are the lateral wall of two drive belts of fixed connection respectively, diaphragm lateral wall central authorities cartridge has the fly leaf, just the fly leaf is sliding fit with the diaphragm, the one end lateral wall fixedly connected with limiting plate of fly leaf, the other end lateral wall fixed connection of fly leaf is the lateral wall of hard board or soft board, the equal fixedly connected with sleeve in diaphragm one end lateral wall four corners department, flexible post is equipped with in the sleeve interpolation, just flexible post is sliding fit with the sleeve, the one end fixed connection of flexible post is the lateral wall of hard board or soft board, sleeve surface cover is equipped with the spring, the lateral wall of the one end fixed connection diaphragm of spring, the other end fixed connection hard board or the lateral wall of soft board of spring.

Preferably, a square groove is formed in the side wall of one end of the supporting block, a push plate is arranged in the square groove, a third hydraulic cylinder is fixedly connected to the four corners of the push plate, one end of the third hydraulic cylinder is fixedly connected with the side wall of the square groove, and the side wall of one end of the push plate abuts against the side wall of the limiting plate.

Preferably, the both ends symmetry fixedly connected with fixing base of seat body, one side of fixing base is rotated through setting up first axis of rotation and is connected the handrail, the one end lower surface of handrail rotates the one end of connecting first pneumatic cylinder, the other end of first pneumatic cylinder inlays the dress at the fixing base top, the groove of accomodating has been seted up in the middle part of the fixing base upper surface.

Preferably, the seat body below is provided with the fixed plate, the both ends lateral wall of fixed plate is the lateral wall of two sliders of fixed connection respectively, be provided with the expansion bracket between the upper surface of fixed plate and the lower surface of seat body, just the four corners department of expansion bracket is all through setting up the cylinder and rotate the connection square, is located two of top the lower surface of square fixed connection seat body is located two of below the upper surface of square sliding connection fixed plate.

Preferably, first chutes are symmetrically formed in two ends of the hard plate and the soft plate, arc plates are symmetrically and fixedly connected to two ends of one side, close to the seat body, of the seat back, the side walls of the arc plates are rotatably connected with a plurality of balls, and the balls are in rotating fit with the first chutes.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the hard plate, the soft plate, the transmission belt and the like are arranged, the first gear can rotate by driving the second motor, the second gear can rotate by meshing the first gear with the second gear, and the second gear rotates to drive the transmission belt to rotate, so that the hard plate and the soft plate can be driven to move, and the hardness degree of the seat backrest can be adjusted.

2. Through setting up fly leaf and diaphragm sliding fit, through setting up the spring again, because the elastic action of spring, can draw hard board and soft board to supporting shoe one side, avoid hard board and soft board laminating backrest, wearing and tearing when reducing hard board and soft board and removing.

3. In addition, through setting up arc, ball and first spout etc. when hard board and soft board removed, the first spout of ball cooperatees to can further reduce the wearing and tearing between hard board and soft board and the seat back.

4. Through setting up push pedal and third pneumatic cylinder, after the position of having adjusted hard board and soft board, drive third pneumatic cylinder to remove the push pedal, the limiting plate of push pedal promotion one side, the fly leaf slides to diaphragm one side, thereby can make hard board or soft board support the backrest.

5. Through driving the first motor, the first motor rotates and can drive the second rotating shaft to rotate, and the second rotating shaft rotates and can drive the seat backrest to rotate, so that the angle of the seat backrest can be adjusted.

Drawings

FIG. 1 is a schematic view of a foldable vehicle seat according to the present invention;

FIG. 2 is a cross-sectional view of a foldable car seat of the present invention;

FIG. 3 is an enlarged view of the foldable vehicle seat of the present invention at A of FIG. 2;

FIG. 4 is a partial cross-sectional structural view of a foldable vehicle seat in accordance with the present invention;

FIG. 5 is a schematic view of a portion of a foldable vehicle seat according to the present invention;

FIG. 6 is a cross-sectional view of an alternative angle of a foldable vehicle seat of the present invention;

FIG. 7 is a schematic structural view of a telescopic frame in a foldable car seat according to the present invention;

fig. 8 is a schematic structural view of a ball in a foldable car seat according to the present invention.

In the figure: 1. an automotive floor; 2. a seat body; 3. a handrail; 4. a back cushion; 5. connecting blocks; 6. a seat back; 7. a first rotating shaft; 8. an outer cover body; 9. a receiving groove; 10. a fixed seat; 11. a first hydraulic cylinder; 12. filling blocks; 13. a first gear; 14. a second gear; 15. a hard plate; 16. a connecting plate; 17. a driving wheel; 18. a transmission belt; 19. a support block; 20. a first chute; 21. a flexible board; 22. a movable plate; 23. pushing the plate; 24. a limiting plate; 25. a transverse plate; 26. a supporting seat; 27. a spring plate; 28. a rotating plate; 29. a second rotating shaft; 30. a first motor; 31. a slider; 32. a second chute; 33. a slide plate; 34. a third chute; 35. a second hydraulic cylinder; 36. a telescopic frame; 37. a cylinder; 38. a fixing plate; 39. a second motor; 40. a third hydraulic cylinder; 41. a square groove; 42. a connecting rod; 43. a ball bearing; 44. an arc-shaped plate; 45. a sleeve; 46. a telescopic column; 47. a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides a technical solution: a foldable automobile seat comprises an automobile bottom plate 1, wherein a supporting seat 26 is fixedly connected to the upper surface of the automobile bottom plate 1, a seat body 2 is arranged above the supporting seat 26, two sides of the lower surface of the seat body 2 are connected with the supporting seat 26 through a moving mechanism, two ends of one side of the seat body 2 are symmetrically and fixedly connected with spring pieces 27, a seat back 6 is fixedly connected to the top ends of the spring pieces 27, the bottom of the seat back 6 is connected with the supporting seat 26 through an adjusting mechanism, supporting blocks 19 are arranged inside the seat back 6, driving wheels 17 are arranged at four corners of each supporting block 19, a connecting rod 42 is fixedly connected between the two driving wheels 17 positioned above or below the supporting block 19, the connecting rod 42 is in rotating fit with the supporting blocks 19, driving belts 18 are sleeved on the outer surfaces of the two driving wheels 17 positioned, the two sides of the supporting block 19 are symmetrically and fixedly connected with connecting plates 16, the two connecting plates 16 are respectively and fixedly connected with the inner walls of the two sides of the seat back 6, one end of one driving wheel 17 is provided with a driving mechanism, the top end and the bottom end in the seat back 6 are fixedly connected with a filling block 12, the two sides of the supporting block 19 are respectively provided with a plurality of hard plates 15 and soft plates 21, one ends of the hard plates 15 and the soft plates 21 are respectively connected with a driving belt 18 through a connecting mechanism, the two sides of the top end of the seat back 6 are symmetrically and fixedly connected with connecting blocks 5, the top end of the connecting blocks 5 is fixedly connected with a back cushion 4, the moving mechanism comprises sliding blocks 31 symmetrically and fixedly connected with the two sides of the lower surface of the seat body 2, the two sides of the upper surface of the supporting seat 26 are provided with second sliding grooves 32 matched with the sliding blocks 31, the, the lower surface fixed connection car bottom plate 1's of the outer cover body 8 upper surface, be provided with second pneumatic cylinder 35 in the outer cover body 8, one side inner wall of the one end fixed connection outer cover body 8 of second pneumatic cylinder 35, the other end fixedly connected with slide 33 of second pneumatic cylinder 35, third spout 34 has all been seted up with the lateral wall of supporting seat 26 to the outer cover body 8, third spout 34 is passed and is connected with the one end of slider 31 to the one end of slide 33, and slide 33 is sliding fit with third spout 34, through driving second pneumatic cylinder 35, thereby can drive slide 33 and remove in third spout 34, because the one end of slide 33 is connected with slider 31, thereby slider 31 can remove, thereby can drive the seat removal, in order to realize adjusting the position of seat.

Adjustment mechanism includes rotor plate 28, the one end of rotor plate 28 rotates the lateral wall of connecting seat back 6, the other end fixed connection second axis of rotation 29 of rotor plate 28, second axis of rotation 29 rotates and inlays the upper surface of dress at supporting seat 26, the output shaft of the first motor 30 of one end fixed connection of second axis of rotation 29, first motor 30 is installed at the upper surface of supporting seat 26, through driving first motor 30, thereby can drive second axis of rotation 29 and rotate, thereby second axis of rotation 29 rotates and can drive rotor plate 28 and rotate, thereby can drive seat back 6 and rotate, thereby can fold the seat.

The driving mechanism comprises a second gear 14, one end of the second gear 14 is fixedly connected with one end of one of the driving wheels 17, a first gear 13 is arranged above the second gear 14, the first gear 13 is meshed with the second gear 14, one end of the first gear 13 is fixedly connected with an output shaft of a second motor 39, one end of the second motor 39 is fixedly installed in the filling block 12, the first gear 13 can rotate by driving the second motor 39, the first gear 13 is meshed with the second gear 14, the second gear 14 can rotate, the second gear 14 rotates to drive the driving belt 18 to rotate, so that the hard plate 15 and the soft plate 21 can be driven to move, and the adjustment of the hardness degree of the seat back 6 can be realized.

The connecting mechanism comprises a transverse plate 25, two ends of the transverse plate 25 are fixedly connected with side walls of two transmission belts 18 respectively, a movable plate 22 is inserted in the center of the side wall of the transverse plate 25, the movable plate 22 and the transverse plate 25 are in sliding fit, a limit plate 24 is fixedly connected with the side wall of one end of the movable plate 22, the side wall of the other end of the movable plate 22 is fixedly connected with the side wall of the hard plate 15 or the soft plate 21, sleeves 45 are fixedly connected at four corners of the side wall of one end of the transverse plate 25, telescopic columns 46 are inserted in the sleeves 45, the telescopic columns 46 are in sliding fit with the sleeves 45, one end of each telescopic column 46 is fixedly connected with the side wall of the hard plate 15 or the soft plate 21, springs 47 are sleeved on the outer surfaces of the sleeves 45, one end of each spring 47 is fixedly connected with the side wall of the transverse plate 25, the other end of each spring 47, due to the elastic force of the spring 47, the hard plate 15 and the soft plate 21 are pulled to one side of the supporting block 19, so that the hard plate 15 and the soft plate 21 are prevented from being attached to the seat back 6, and the abrasion of the hard plate 15 and the soft plate 21 during movement is reduced.

Square groove 41 has been seted up to the one end lateral wall of supporting shoe 19, be provided with push pedal 23 in the square groove 41, push pedal 23 four corners fixedly connected with third pneumatic cylinder 40, the lateral wall of the square groove 41 of one end fixed connection of third pneumatic cylinder 40, push pedal 23 one end lateral wall supports the lateral wall of limiting plate 24, through setting up push pedal 23 and third pneumatic cylinder 40, after the position of having adjusted hard board 15 and soft board 21, drive third pneumatic cylinder 40, thereby remove push pedal 23, push pedal 23 promotes the limiting plate 24 of one side, fly leaf 22 slides to diaphragm 25 one side, thereby can make hard board 15 or soft board 21 support seat back 6.

The both ends symmetry fixedly connected with fixing base 10 of seat body 2, one side of fixing base 10 is rotated through setting up first axis of rotation 7 and is connected handrail 3, the one end lower surface of handrail 3 is rotated and is connected the one end of first pneumatic cylinder 11, the other end of first pneumatic cylinder 11 inlays the dress at fixing base 10 top, fixing base 10 upper surface middle part has been seted up and has been accomodate groove 9, through setting up first pneumatic cylinder 11 and handrail 3, can adjust the angle of handrail 3, accomodate groove 9 through the setting, can accomodate.

Seat body 2 below is provided with fixed plate 38, the both ends lateral wall of fixed plate 38 is the lateral wall of two sliders 31 of fixed connection respectively, be provided with expansion bracket 36 between the upper surface of fixed plate 38 and the lower surface of seat body 2, and expansion bracket 36's four corners department all rotates the connection square through setting up cylinder 37, be located the lower surface of two square fixed connection seat body 2 of top, be located the upper surface of two square sliding connection fixed plates 38 of below, through setting up expansion bracket 36, the increase buffering, improve the comfort level when the passenger takes.

First spout 20 has been seted up to hard board 15 and the both ends symmetry of soft board 21, be close to one side both ends symmetry fixedly connected with arc 44 of seat body 2 in the backrest 6, arc 44 lateral wall rotates and is connected with a plurality of balls 43, and ball 43 is normal running fit with first spout 20, cross and set up arc 44, ball 43 and first spout 20 etc. when hard board 15 removed with soft board 21, ball 43 first spout 20 cooperatees, thereby can further reduce the wearing and tearing between hard board 15 and soft board 21 and the backrest 6.

The working principle is as follows: through setting up hard board 15, soft board 21 and drive belt 18 etc, through drive second motor 39, thereby first gear 13 can rotate, because first gear 13 meshes with second gear 14 mutually, thereby second gear 14 can rotate, thereby second gear 14 rotates and can drive belt 18 and rotate, thereby can drive hard board 15 and soft board 21 and remove, thereby can realize adjusting the soft or hard degree of backrest 6. Through setting up fly leaf 22 and diaphragm 25 sliding fit, through setting up spring 47 again, because the spring 47's elasticity effect can be drawn hard board 15 and soft board 21 to supporting shoe 19 one side, avoid hard board 15 and soft board 21 laminating backrest 6, reduce the wearing and tearing when hard board 15 and soft board 21 remove. In addition, through setting up arc 44, ball 43 and first spout 20 etc, when hard board 15 and soft board 21 remove, ball 43 first spout 20 cooperatees, thereby can further reduce the wearing and tearing between hard board 15 and soft board 21 and the seat back 6, through setting up push pedal 23 and third pneumatic cylinder 40, after adjusting hard board 15 and soft board 21's position, drive third pneumatic cylinder 40, thereby remove push pedal 23, push pedal 23 promotes the limiting plate 24 of one side, fly leaf 22 slides to diaphragm 25 one side, thereby can make hard board 15 or soft board 21 support seat back 6, through driving first motor 30, thereby first motor 30 rotates and can drive second axis of rotation 29 and rotate, thereby second axis of rotation 29 rotates and can drive seat back 6 and rotate, thereby can give the angle of adjusting seat back 6.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.