CN112623086A

CN112623086A - Child's bike

Info

Publication number: CN112623086A
Application number: CN202110072756.7A
Authority: CN
Inventors: 严思建
Original assignee: Zhongshan Shaoxiawang Plastic Products Co ltd
Current assignee: Zhongshan Shaoxiawang Plastic Products Co ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-04-09

Abstract

The invention discloses a baby carriage which comprises a supporting seat, wherein a steering assembly capable of rotating relative to the supporting seat is connected to the supporting seat, the steering assembly comprises a steering rod capable of rotating relative to the supporting seat, the lower end of the steering rod is connected with a front wheel, a pedal is connected to the front wheel, a steering handle is connected to the upper end of the steering rod, the baby carriage further comprises a supporting frame capable of being used for riding, the supporting frame is provided with a front connecting portion and a rear connecting portion, the front connecting portion is connected with the steering rod, the rear connecting portion is connected with a rear wheel, a transmission member movably connected with the supporting frame and the supporting seat is further arranged between the supporting frame and the supporting seat, the staying position of the front connecting portion on the steering rod comprises an upper side position located on the upper side of the steering rod and a lower side position located below the upper side position, when the front connecting portion. The folding chair has the advantages of simple structure, convenience in operation and small volume after being folded.

Description

Child's bike

[ technical field ] A method for producing a semiconductor device

The invention relates to a child vehicle.

[ background of the invention ]

Children's vehicles have become a common product in the growth process of children. The current children's carriages on the market can be unfolded or folded. In the unfolded state, children ride the child's bike and play, and in folded state, the user of being convenient for carries or deposits. But the structure of the current traditional baby carriage is more complex, the folding operation is inconvenient, and the volume is still larger after the folding.

Therefore, the present invention has been made in view of the above disadvantages.

[ summary of the invention ]

The invention aims to overcome the defects of the prior art and provides the child bicycle which is simple in structure, convenient to operate and small in size after being folded.

The invention is realized by the following technical scheme:

a child's vehicle that can move from an unfolded position to a folded position after a locking device is unlocked, characterized in that: the children's vehicle comprises a supporting seat 1, a steering component 2 which can rotate relative to the supporting seat 1 is connected to the supporting seat 1, the steering component 2 comprises a steering rod 21 which can rotate relative to the supporting seat 1, a front wheel 22 is connected to the lower end of the steering rod 21, a pedal 23 is connected to the front wheel 22, a steering handle 24 is connected to the upper end of the steering rod 21, the children's vehicle further comprises a supporting frame 3 which can be used for sitting, the supporting frame 3 is provided with a front connecting portion 31 and a rear connecting portion 32, the front connecting portion 31 is connected with the steering rod 21, the rear connecting portion 32 is connected with a rear wheel 33, a transmission member 4 which is movably connected with the supporting frame 3 and the supporting seat 1 is further arranged between the supporting frame 3 and the supporting seat, the staying position of the front connecting portion 31 on the steering rod 21 comprises an upper side position which is located on the upper side of the steering rod 21 and a lower side position which, the perambulator be in the state of expanding, when current connecting portion 31 stops in the upper side position, the perambulator be in the state of closing.

The child vehicle is characterized in that: the front connecting portion 31 is connected to the steering rod 21 through a sliding member 5, the sliding member 5 is slidably connected to the steering rod 21 so that the front connecting portion 31 can be switched between an upper position and a lower position, and the front connecting portion 31 is rotatably connected to the sliding member 5.

The child vehicle is characterized in that: the transmission part 4 comprises a transmission rod 41, one end of the transmission rod 41 is rotatably connected with the supporting seat 1, and the other end of the transmission rod 41 is rotatably connected with the supporting frame 3.

The child vehicle is characterized in that: support frame 3 include bracing piece 34, preceding connecting portion 31 and back connecting portion 32 establish on bracing piece 34, support frame 3 still include with bracing piece 34 rotatable coupling and can draw close folding seat portion 35 to bracing piece 34 automatically when preceding connecting portion 31 moves from downside position upside position, seat portion 35 and bracing piece 34 between be equipped with the latch part 36 that is used for locking seat portion 35 and bracing piece 34 relative position when preceding connecting portion 31 is in the downside position.

The child vehicle is characterized in that: the locking component 36 includes a locking groove 361 provided on the support rod 34, the seat 35 is provided with a sliding block 362 capable of sliding transversely therein, the sliding block 362 is provided with a locking pin 363 capable of engaging with or disengaging from the locking groove 361, the seat 35 is further provided with a first return spring 364 capable of pushing the sliding block 362 to return, the transmission component 4 includes a transmission rod 41, one end of the transmission rod 41 is rotatably connected with the support base 1, the other end is rotatably connected with the support rod 34, the transmission rod 41 is provided with an opening positioning groove 365 capable of keeping the locking pin 363 in the locking groove 361 when the buggy is in the unfolded state, and the transmission rod 41 is further provided with an arc-shaped surface 366 capable of pushing the locking pin 363 out of the locking groove 361 when the front connecting part 31 moves from the lower side to the upper side.

The child vehicle is characterized in that: the driving medium 4 include the transfer line 41, transfer line 41 one end and supporting seat 1 rotate to be connected, the other end rotates with the bracing piece 34 to be connected, locking device including establishing the locking groove 61 on the transfer line 41, the bracing piece 34 on be equipped with can slide in it and can with locking groove 61 block or the stop pin 62 that breaks away from, the bracing piece 34 on and lie in preceding connecting portion 31 position and still be connected with its pivoted rotating handle 63 relatively, rotating handle 63 and stop pin 62 between be equipped with and be connected with the two and can stimulate the cable 64 that stop pin 62 and locking groove 61 break away from when rotating handle 63 rotates, bracing piece 34 in still be equipped with the second reset spring 65 that can promote the reset of stop pin 62, rotating handle 63 and bracing piece 34 between still be equipped with the reset torsion spring 66 that resets that is used for rotating handle 63.

The child vehicle is characterized in that: the seat portion 35 includes a seat base 351 and a seat plate 352 detachably connected to the seat base 351, the seat base 351 is rotatably connected to the support rod 34, and the latching member 36 is disposed between the seat base 351 and the support rod 34.

The child vehicle is characterized in that: the seat portion 35 is connected with a backrest 37 capable of rotating relative to the seat portion, and the backrest 37 is connected with a surrounding frame 38 capable of rotating relative to the backrest.

The child vehicle is characterized in that: the backrest 37 is provided with a clamping groove 71, the backrest 37 is connected with a clamping plate 72 which can move up and down relative to the backrest and can be clamped with or separated from the clamping groove 71, a third return spring which can push the clamping plate 72 to return is further arranged in the backrest 37, a clamping hole 81 is formed in the surrounding frame 38, a clamping pin 82 which can transversely move in the backrest 37 and can be clamped with or separated from the clamping hole 81 is arranged in the backrest 37, a moving block 83 is connected with the clamping pin 82, an inclined groove 84 is formed in the moving block 83, an exposed button 85 is arranged on the backrest 37, a pushing pin 86 which penetrates through the inclined groove 84 and can push the moving block 83 to transversely move when the button 85 moves downwards is arranged on the button 85, and a fourth return spring 87 which can push the moving block 83 to return is further arranged in the backrest 37.

The child vehicle is characterized in that: the support bar 34 is V-shaped and has two rear connecting portions 32 and two corresponding rear wheels 33, and a transverse bar 39 is provided on the support bar 34.

Compared with the prior art, the invention has the following advantages:

1. the stay position of the front connecting part of the support frame on the steering rod comprises an upper side position located at a higher position and a lower side position located below the upper side position, when the front connecting part is located at the lower side position, the baby carriage is in an unfolded state, when the front connecting part is located at the upper side position, the baby carriage is in a folded state, and at the moment, the support frame and the transmission part are both close to the steering rod, so that the folded baby carriage is small in size. Whole child's bike structure includes the supporting seat, turns to subassembly, support frame and driving medium structure succinctly, expandes or folding operation only need switch the support frame on preceding connecting portion stop position on the steering column can, operate unusual convenient and fast.

2. The steering rod of the child car is connected with the sliding piece capable of sliding relative to the steering rod, and the front connecting portion is rotatably connected to the sliding piece, so that in the unfolding or folding process of the child car, the switching between the upper side position and the lower side position of the front connecting portion on the steering rod is achieved through the sliding of the sliding piece on the steering rod, and the child car is quite stable and reliable in the unfolding or folding process and flexible in folding.

3. The driving part comprises a driving rod, one end of the driving rod is rotatably connected with the supporting seat, and the other end of the driving rod is rotatably connected with the supporting frame, so that when the baby carriage is in an unfolded state, the driving rod, the steering rod and the supporting frame form a triangular structure, the baby carriage is stable in structure, and in the process that the front connecting part moves from the lower side position to the upper side position, the driving rod, the supporting seat and the supporting frame rotate relatively to be close to the steering rod, the folding is realized, and the driving rod is always connected with the supporting frame in the folding process of the supporting frame, so that the flexible folding of the supporting frame.

4. The support frame comprises the support rod and the seat part which is rotatably connected with the support rod, and the seat part can enable a child to sit more comfortably. When the child stroller is folded, the supporting rod moves towards the steering rod, the seat portion automatically rotates relative to the supporting rod to be folded on the supporting rod, the child stroller occupies a small space after being folded, and the seat portion is automatically folded, so that the child stroller is convenient and fast to fold.

5. When the child bicycle is folded, the front connecting part moves from the lower side position to the upper side position, the transmission rod rotates relative to the supporting rod in the process, the arc-shaped surface of the transmission rod pushes the clamping pin in the rotating process, so that the clamping pin is withdrawn from the clamping groove in the supporting rod and the opening positioning groove in the transmission rod, the seat part and the supporting rod are unlocked, the seat part automatically rotates towards the supporting rod to be closed due to gravity, the folding operation of the child bicycle is simple, convenient and quick, and the whole structural design is very ingenious.

6. The invention has simple structure, convenient unfolding or folding operation, small volume after folding and convenient carrying, can be placed in an automobile trunk and an airplane luggage rack, and is suitable for popularization and application.

[ description of the drawings ]

FIG. 1 is a perspective view of embodiment 1 of the present invention;

FIG. 2 is a side view showing an expanded state of embodiment 1 of the present invention;

FIG. 3 is a sectional view showing an expanded state in embodiment 1 of the present invention;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is an exploded view of embodiment 1 of the present invention;

FIG. 6 is a side view during folding of example 1 of the present invention;

FIG. 7 is a side view of the embodiment 1 of the present invention in a folded state;

FIG. 8 is a sectional view showing a folded state of embodiment 1 of the present invention;

FIG. 9 is an enlarged view at B in FIG. 8;

FIG. 10 is a side view of embodiment 2 of the present invention;

FIG. 11 is a perspective view of the parts of embodiment 2 of the present invention;

FIG. 12 is one of the cross-sectional views of the parts of embodiment 2 of the invention;

FIG. 13 is a second cross-sectional view of a part of example 2 of the present invention;

fig. 14 is a side view in a folded state of embodiment 2 of the present invention.

[ detailed description ] embodiments

The invention is further described below with reference to the accompanying drawings:

example 1:

as shown in fig. 1 to 9, a child car which can move from an unfolded position to a folded position after a locking device is unlocked comprises a support base 1, a steering component 2 which can rotate relative to the support base 1 is connected to the support base 1, the steering component 2 comprises a steering rod 21 which can rotate relative to the support base 1, the lower end of the steering rod 21 is connected with a front wheel 22, a pedal 23 is connected to the front wheel 22, a steering handle 24 is connected to the upper end of the steering rod 21, the child car further comprises a support frame 3 which can be used for sitting, the support frame 3 comprises a front connecting part 31 and a rear connecting part 32, the front connecting part 31 is connected with the steering rod 21, the rear connecting part 32 is connected with a rear wheel 33, a transmission part 4 which is movably connected with the support frame 3 and the support base 1 is arranged between the support frame 3 and the support base 1, and the staying position of the front connecting part 31 on the steering rod 21 comprises an upper side position which is positioned on the upper side of the steering rod Position, current connecting portion 31 stops when the downside position, the perambulator be in the state of expanding, current connecting portion 31 stops when the upside position, the perambulator be in the state of closing. The stop position of the front connecting portion 31 of the support frame 3 on the steering rod 21 includes the upper side position located at a higher position and the lower side position located below the upper side position, when the current connecting portion 31 is located at the lower side position, the buggy is in the unfolded state, when the current connecting portion 31 is located at the upper side position, the buggy is in the folded state, and at this moment, the support frame 3 and the transmission member 4 are all closed to the steering rod 21, and the folded size is small. Whole child's bike structure includes supporting seat 1, turns to subassembly 2, support frame 3 and driving medium 4, and the structure is succinct, expandes or folding operation only need switch on the support frame 3 before connecting portion 31 on steering column 21 the stop position can, operate convenience and fast very.

As shown in fig. 2, 6 and 7, the front connecting portion 31 is connected to the steering rod 21 through a sliding member 5, the sliding member 5 is slidably connected to the steering rod 21 so that the front connecting portion 31 can be switched between an upper position and a lower position, and the front connecting portion 31 is rotatably connected to the sliding member 5. In the unfolding or folding process of the baby carriage, the switching between the upper side position and the lower side position of the front connecting part 31 on the steering rod 21 is realized by the sliding of the sliding part 5 on the steering rod 21, so that the unfolding or folding process of the baby carriage is very stable and reliable, and the folding is flexible. In the present embodiment, the sliding member 5 is a sliding sleeve fitted over the steering rod 21.

As shown in fig. 2 to 7, the transmission member 4 includes a transmission rod 41, one end of the transmission rod 41 is rotatably connected to the support base 1, and the other end is rotatably connected to the support frame 3. When the perambulator was expanded the state, transfer line 41, steering column 21 and support frame 3 constitute the triangle-shaped structure for the perambulator structure is firm, and the in-process that connecting portion 31 moved from downside position to upside position in the front, transfer line 41 all takes place relative rotation and draws close on steering column 21 with supporting seat 1 and support frame 3, has realized again closing, and close in-process transfer line 41 at support frame 3 and be connected with support frame 3 all the time, also ensure that support frame 3 closes in a flexible way.

As shown in fig. 3 to 9, the supporting frame 3 includes a supporting rod 34, the front connecting portion 31 and the rear connecting portion 32 are disposed on the supporting rod 34, the supporting frame 3 further includes a seat portion 35 rotatably connected to the supporting rod 34 and capable of automatically closing and folding the supporting rod 34 when the front connecting portion 31 moves from a lower position to an upper position, and a locking member 36 for locking the relative position of the seat portion 35 and the supporting rod 34 when the front connecting portion 31 is at the lower position is disposed between the seat portion 35 and the supporting rod 34. The seat portion 35 may be provided to make the child more comfortable to ride. When the child stroller is folded, in the process that the supporting rod 34 is drawn toward the steering rod 21, the seat portion 35 automatically rotates relative to the supporting rod 34 to be drawn toward the supporting rod 34, so that the child stroller occupies a small space after being folded, and the seat portion 35 is automatically folded, so that the child stroller can be folded simply and quickly.

As shown in fig. 3 to 9, the locking member 36 includes a locking groove 361 provided on the support rod 34, the seat 35 is provided with a sliding block 362 capable of sliding laterally therein, the sliding block 362 is provided with a locking pin 363 capable of engaging with or disengaging from the locking groove 361, the seat 35 is further provided with a first return spring 364 capable of returning the sliding block 362, the transmission rod 41 is provided with an opening positioning groove 365 capable of holding the locking pin 363 in the locking groove 361 when the stroller is in the unfolded state, and the transmission rod 41 is further provided with an arc-shaped surface 366 capable of pushing the locking pin 363 out of the locking groove 361 when the front connecting portion 31 moves from the lower side to the upper side. In the unfolded state of the stroller, the first return spring 364 in the seat 35 keeps the sliding block 362 pushed, the locking pin 363 of the sliding block 362 is locked in the locking groove 361 of the support rod 34, and the locking pin 363 is located in the opening positioning slot 365 of the transmission rod 41, and the opening positioning slot 365 catches on the locking pin 363 to prevent the locking pin 363 from being released from the locking groove 361. When the baby carriage is folded, the front connecting part 31 moves from the lower side to the upper side, in the process, the front connecting part 31 rises, the transmission rod 41 rotates relative to the supporting seat 1 and the supporting rod 34, in the process that the transmission rod 41 rotates relative to the supporting rod 34, the arc-shaped surface 366 on the transmission rod 41 pushes the locking pin 363, so that the locking pin 363 withdraws from the opening positioning groove 365 and the locking groove 361, in the process, the first return spring 364 is compressed, once the locking pin 363 withdraws from the opening positioning groove 365 and the locking groove 361, the seat part 35 unlocks from the supporting rod 34, and at the moment, the seat part 35 automatically rotates relative to the supporting rod 34 due to the self gravity and is drawn close to the supporting rod 34 to achieve folding. The whole structure is simple and ingenious, and the folding is flexible, so that the folding operation of the baby carriage is simple, convenient and quick.

As shown in fig. 4, 5 and 9, locking device including establishing locking groove 61 on the transfer line 41, the bracing piece 34 on be equipped with can slide in it and can with locking groove 61 block or the stop pin 62 that breaks away from, bracing piece 34 on and lie in preceding connecting portion 31 position and still be connected with its pivoted turning handle 63 relatively, turning handle 63 and stop pin 62 between be equipped with and be connected with the two and can stimulate the cable 64 that stop pin 62 and locking groove 61 break away from when turning handle 63 rotates, bracing piece 34 in still be equipped with the second reset spring 65 that can promote stop pin 62 and reset, turning handle 63 and bracing piece 34 between still be equipped with the reset torsion spring 66 that is used for turning handle 63 to reset. When the child stroller needs to be folded, the rotating handle 63 is pulled to rotate, the rotating handle 63 pulls the stay cable 64 in the rotating process, the stay cable 64 pulls the locking pin 62 to be separated from the locking groove 61, the child stroller locking device is unlocked, and the front connecting part 31 can move from the upper side of the lower side position. In actual operation, the locking device is unlocked and the front connecting part 31 moves from the lower side to the upper side only by rotating the rotating handle 61 and lifting the rotating handle 61 upwards, so that the folding operation of the baby carriage is finished at one time, and the operation is simple and rapid. Of course other conventional locking arrangements for the locking means of the child's vehicle may be used.

As shown in fig. 5, the seat portion 35 includes a seat base 351 and a seat plate 352 detachably connected to the seat base 351, the seat base 351 is rotatably connected to the support rod 34, and the latch member 36 is disposed between the seat base 351 and the support rod 34. The seat plate 352 can be detached from the seat base 351 so that the packaging volume can be reduced in the production of the child car and the child car can be transported conveniently.

As shown in fig. 5, the support bar 34 is V-shaped and has two rear connecting portions 32 and two corresponding rear wheels 33, and the support bar 34 is provided with a transverse bar 39. Thus, the support bar 34 and the transverse bar 39 are shaped like the letter "A", so that the entire buggy structure is very robust and reliable.

As shown in fig. 1, 3, 5 and 10, the transverse rod 39 is provided with an insertion sleeve 30 which can rotate relative to the transverse rod and can be inserted with the push rod 9, and a pull rope (not shown) which is used for connecting the insertion sleeve 30 and the steering rod 21 and can drive the steering assembly 2 to rotate when the insertion sleeve 30 rotates is arranged between the insertion sleeve 30 and the steering rod 21. The user can peg graft push rod 9 in grafting cover 30, and the adult of being convenient for pushes away, and children can drive grafting cover 30 and rotate when rotating push rod 9, and grafting cover 30 rotates and then can pass through stay cord pulling steering column 21 rotation above that to be convenient for the adult through the direction of control child's bike when the push rod 9 pushes away.

As shown in fig. 1 and 5, the two rear wheels 33 are rotatably connected to the support bar 34 and can move from the outside of the support bar 34 to the inside of the support bar 34 to be close to each other. When two rear wheels 33 all are located the outside of bracing piece 34, the perambulator is used as the tricycle, and when two rear wheels 33 rotated to the inboard of bracing piece 34, the perambulator can regard as the balance car to use for the perambulator function is various.

Example 2:

as shown in fig. 10 to 14, embodiment 2 differs from embodiment 1 in that:

the seat portion 35 is connected with a backrest 37 capable of rotating relative to the seat portion, and the backrest 37 is connected with a surrounding frame 38 capable of rotating relative to the backrest. The backrest 37 is provided to facilitate the back rest of the smaller child when seated and the enclosure 38 provides greater safety for the smaller child when seated. And when the child car is folded, the backrest 37 and the enclosure frame 38 can also be rotated relative to the seat portion 35 to be folded, so as to ensure that the folded child car is small in size.

As shown in fig. 11 and 12, the seat portion 35 is provided with a locking groove 71, the backrest 37 is connected with a locking plate 72 capable of moving up and down relative to the seat portion and being locked with or disengaged from the locking groove 71, the backrest 37 is further provided with a third return spring (not shown) capable of pushing the locking plate 72 to return, the enclosure frame 38 is provided with a locking hole 81, the backrest 37 is provided with a locking pin 82 capable of moving transversely therein and being locked with or disengaged from the locking hole 81, the locking pin 82 is connected with a moving block 83, the moving block 83 is provided with a chute 84, the backrest 37 is provided with an exposed button 85, the button 85 is provided with a pushing pin 86 penetrating through the chute 84 and capable of pushing the moving block 83 to move transversely when the button 85 moves downwards, and the backrest 37 is further provided with a fourth return spring 87 capable of pushing the moving block 83 to return. When the backrest 37 needs to be folded, the backrest 37 can be rotated and folded only by pulling the catch plate 72 upwards to disengage the catch plate 73 from the catch groove 71 on the seat part 35. When the surrounding frame 38 is folded, the push button 85 is pressed, the push pin 86 pushes the groove wall of the inclined groove 84, so that the moving block 83 moves transversely, the bayonet 82 on the moving block 83 is withdrawn from the bayonet hole 81 on the surrounding frame 38, and the surrounding frame 38 can be rotated to fold the surrounding frame 38. Therefore, the folding operation of the backrest 37 and the enclosure frame 38 is also very convenient and fast.

Claims

1. A child's vehicle that can move from an unfolded position to a folded position after a locking device is unlocked, characterized in that: the baby carriage comprises a supporting seat (1), the supporting seat (1) is connected with a steering assembly (2) capable of rotating relative to the supporting seat, the steering assembly (2) comprises a steering rod (21) capable of rotating relative to the supporting seat (1), the lower end of the steering rod (21) is connected with a front wheel (22), a pedal plate (23) is connected to the front wheel (22), a steering handle (24) is connected to the upper end of the steering rod (21), the baby carriage further comprises a supporting frame (3) capable of being used for riding, the supporting frame (3) is provided with a front connecting part (31) and a rear connecting part (32), the front connecting part (31) is connected with the steering rod (21), the rear connecting part (32) is connected with a rear wheel (33), a transmission part (4) movably connected with the supporting frame (3) and the supporting seat (1) is further arranged between the supporting frame (3) and the supporting seat (1), and the stop position of the front connecting part (31) on the steering rod (21) comprises a Go up the side position and be located the lower side position of side position below, current connecting portion (31) stop when the lower side position, the perambulator be in the state of expanding, current connecting portion (31) stop when last side position, the perambulator be in the state of closing.

2. The child's vehicle of claim 1, wherein: the front connecting part (31) is connected with the steering rod (21) through a sliding part (5), the sliding part (5) is connected on the steering rod (21) in a sliding mode so that the front connecting part (31) can be switched between an upper side position and a lower side position, and the front connecting part (31) is connected on the sliding part (5) in a rotating mode.

3. The child's vehicle of claim 1, wherein: the transmission part (4) comprises a transmission rod (41), one end of the transmission rod (41) is rotatably connected with the supporting seat (1), and the other end of the transmission rod is rotatably connected with the supporting frame (3).

4. Child's vehicle according to claim 1 or 2, characterized in that: support frame (3) including bracing piece (34), front connecting portion (31) and back connecting portion (32) establish on bracing piece (34), support frame (3) still include with bracing piece (34) rotatable coupling and can draw close folding seat portion (35) to bracing piece (34) automatically when front connecting portion (31) are moved from the downside position to the upside, seat portion (35) and bracing piece (34) between be equipped with block lock part (36) that are used for locking seat portion (35) and bracing piece (34) relative position when front connecting portion (31) are in the downside position.

5. Child's vehicle according to claim 4, characterized in that: the locking part (36) comprises a locking groove (361) arranged on the support rod (34), a sliding block (362) capable of transversely sliding in the seat part (35) is arranged on the seat part (35), a locking pin (363) capable of being engaged with or disengaged from the locking groove (361) is arranged on the sliding block (362), a first reset spring (364) capable of pushing the sliding block (362) to reset is further arranged in the seat part (35), the transmission part (4) comprises a transmission rod (41), one end of the transmission rod (41) is rotatably connected with the support seat (1), the other end of the transmission rod is rotatably connected with the support rod (34), an opening positioning groove (365) capable of keeping the locking pin (363) in the locking groove (361) when the buggy is in an unfolded state is arranged on the transmission rod (41), and an arc-shaped surface (361) capable of pushing the locking pin (363) out of the locking groove (361) when the front connecting part (31) moves upwards from the lower side position is further arranged on the transmission rod (41) 366).

6. Child's vehicle according to claim 4, characterized in that: driving medium (4) including transfer line (41), transfer line (41) one end rotate with supporting seat (1) and be connected, the other end rotates with bracing piece (34) and is connected, locking device including establishing locking groove (61) on transfer line (41), bracing piece (34) on be equipped with can slide in it and can with locking groove (61) block or the stop pin (62) that break away from, bracing piece (34) on and lie in preceding connecting portion (31) position and still be connected with and can be relative its pivoted rotating handle (63), rotating handle (63) and stop pin (62) between be equipped with the two and be connected and can stimulate cable (64) that stop pin (62) and locking groove (61) break away from when rotating handle (63), bracing piece (34) in still be equipped with second reset spring (65) that can promote stop pin (62) to reset, and a reset torsion spring (66) for resetting the rotating handle (63) is also arranged between the rotating handle (63) and the supporting rod (34).

7. Child's vehicle according to claim 4, characterized in that: the seat part (35) comprises a seat base (351) and a seat plate (352) detachably connected with the seat base (351), the seat base (351) is rotatably connected with the supporting rod (34), and the locking part (36) is arranged between the seat base (351) and the supporting rod (34).

8. Child's vehicle according to claim 4, characterized in that: the seat part (35) is connected with a backrest (37) which can rotate relative to the seat part, and the backrest (37) is connected with a surrounding frame (38) which can rotate relative to the backrest.

9. Child's vehicle according to claim 4, characterized in that: a clamping groove (71) is arranged on the seat part (35), a clamping plate (72) which can move up and down relative to the backrest (37) and can be clamped with or separated from the clamping groove (71) is connected on the backrest (37), a third return spring which can push the clamping plate (72) to return is also arranged in the backrest (37), the surrounding frame (38) is provided with a clamping hole (81), the backrest (37) is internally provided with a clamping pin (82) which can transversely move in the backrest and can be clamped with or separated from the clamping hole (81), the bayonet lock (82) is connected with a moving block (83), the moving block (83) is provided with a chute (84), the backrest (37) is provided with an exposed button (85), the button (85) is provided with a pushing pin (86) which is arranged in the inclined groove (84) in a penetrating way and can push the moving block (83) to move transversely when the button (85) moves downwards, a fourth return spring (87) capable of pushing the moving block (83) to return is further arranged in the backrest (37).

10. Child's vehicle according to claim 4, characterized in that: the support rod (34) is V-shaped and is provided with two rear connecting parts (32) and two corresponding rear wheels (33), and a transverse rod (39) is arranged on the support rod (34).