CN220535733U - Child cart - Google Patents

Abstract

The utility model discloses a child stroller, which comprises a foldable bottom support frame of a specific front wheel and a rear wheel, wherein a base is arranged at the upper end of the bottom support frame, a rotating seat capable of rotating in a horizontal plane relative to the base is arranged on the base, a push rod assembly capable of rotating in a vertical plane relative to the rotating seat and driving the rotating seat to rotate in the horizontal plane is connected to the rotating seat, a seat assembly capable of rotating in the vertical plane relative to the rotating seat is also arranged on the rotating seat, the position where the seat assembly stays comprises a forward-oriented forward direction and a reverse position where the seat stays after the rotating seat rotates in the horizontal plane, a first locking mechanism is arranged between the push rod assembly and the rotating seat, a second locking mechanism is arranged between the seat assembly and the rotating seat, a third locking mechanism is arranged between the rotating seat and the base, and a transmission part capable of unlocking the third locking mechanism when the push rod assembly rotates forwards to a vertical position is arranged between the push rod assembly and the rotating seat. The utility model has simple structure and convenient reversing.

Description

Child cart

[ field of technology ]

The utility model relates to a child stroller.

[ background Art ]

The child stroller is a common product in the growth process of children, the current child stroller generally comprises a foldable bottom support frame, a push rod assembly and a seat assembly, the seat assembly is generally detachably mounted on the bottom support frame so that the seat assembly can be reversed back and forth, when the seat assembly faces forward, the children face forward with adults pushing the child stroller, and when the seat assembly is dismounted from the bottom support frame and is mounted on the bottom support frame after 180 degrees are selected, the children in the seat assembly can face to face with adults pushing the child stroller so as to facilitate interaction between adults and children. However, the child stroller with such a structure has the following disadvantages: when the seat assembly is reversed forwards and backwards, the seat assembly is required to be disassembled and then installed, and the front and back reversing is inconvenient.

The present utility model has been made in view of the above drawbacks.

[ utility model ]

The utility model aims to overcome the defects of the prior art and provides the child cart with simple structure and convenient reversing.

The utility model is realized by the following technical scheme:

the utility model provides a children's shallow, including having the collapsible bottom sprag frame of front wheel and rear wheel, the bottom sprag frame upper end is equipped with the base, be equipped with on the base and can rotate the roating seat in the horizontal plane relative it, be connected with on the roating seat and can drive the push rod subassembly of roating seat in the horizontal plane relative it in vertical plane internal rotation, still be equipped with on the roating seat and can rotate the seat subassembly in vertical plane relative it, the position that the seat subassembly stayed includes forward direction and follows the reverse position that the roating seat was stayed behind the rotation degree in the horizontal plane, be equipped with first locking mechanical system between push rod subassembly and the roating seat, be equipped with second locking mechanical system between seat subassembly and the roating seat, be equipped with third locking mechanical system between roating seat and the base, and be equipped with the drive assembly who makes third locking mechanical system unblock when push rod subassembly rotates forward to vertical position between the roating seat.

The push rod assembly comprises a support rod and a push rod connected to the upper end of the support rod, a left connecting seat and a right connecting seat are arranged at the lower end of the support rod, a left side seat connected with the left connecting seat and a right side seat connected with the right connecting seat are arranged on the rotating seat, a connecting groove is formed between the left side seat and the right side seat, the seat assembly comprises a seat plate and a protruding seat arranged on the lower side of the seat plate, the protruding seat is arranged in the connecting groove and connected with the left side seat and the right side seat, and the left connecting seat, the left side seat, the protruding seat, the right side seat and the right connecting seat are coaxially and rotatably connected.

And a control assembly which can prevent the push rod assembly in the vertical state from rotating forwards and ensure the push rod assembly in the vertical state to rotate backwards when the seat assembly is in the forward direction or the reverse direction is also arranged between the push rod assembly and the rotating seat.

The control assembly comprises a left front groove and a left rear groove which are concavely arranged on the outer peripheral surface of the left connecting seat, the control assembly further comprises a right front groove and a right rear groove which are arranged on the outer peripheral surface of the right connecting seat, the rotating seat is internally provided with a left front block assembly, a left rear block assembly, a right front block assembly and a right rear block assembly which can slide up and down in the rotating seat, the base is provided with a left side groove which can be matched with the left front block assembly and the right rear block assembly and a right side groove which can be matched with the left rear block assembly and the right front block assembly along the circumferential direction, the left front groove, the left rear groove, the right front groove and the right rear groove are respectively provided with a straight groove wall and a chute wall opposite to the corresponding straight groove wall, and when the child stroller is in a pushing state, the outer peripheral surfaces of the left connecting seat and the right connecting seat push against the left front block assembly, the left rear block assembly, the right front block assembly and the upper ends of the right rear block assembly so that the left front block assembly, the left rear block assembly and the right front block assembly are separated from the corresponding left front groove, the left rear groove, the right front groove and the right front groove which fall into the lower front groove of the left front groove and the right front groove and lower end of the left front groove; when the first locking mechanism is unlocked and the push rod assembly rotates forwards to a vertical state, the left front block assembly is kept separate from the left front groove, the left rear block assembly is kept clamped with the left rear groove, the right front block assembly is kept separate from the right front groove, the right rear block assembly is kept clamped with the right rear groove, and the straight groove walls of the left rear groove and the right rear groove respectively block the left rear block assembly and the right rear block assembly to prevent the push rod assembly from continuing to rotate forwards; in the process that the push rod assembly is in a vertical state and drives the rotating seat to rotate in a horizontal plane, the lower end of the left front block assembly is separated from the left side groove, the upper end of the left front block assembly enters the left front groove, the lower end of the right front block assembly is separated from the right side groove, the upper end of the right front block assembly enters the right front groove, the left rear groove is kept clamped with the left rear block assembly, the right rear groove is kept clamped with the right rear block assembly, and the straight groove walls of the left front groove and the right front groove respectively block the left front block assembly and the right front block assembly to prevent the push rod assembly from rotating; when the push rod assembly is completed with the rotation degree of the rotating seat, the left front block assembly is positioned in the left front groove, the lower end of the left rear block assembly enters the right side groove, the upper end of the left rear block assembly is separated from the left rear groove, the right front block assembly is positioned in the right front groove, the lower end of the right rear block assembly enters the left side groove, the upper end of the right rear block assembly is separated from the right rear groove, and the straight groove walls of the left front groove and the right front groove respectively block the left front block assembly and the right front block assembly to prevent the push rod assembly from rotating forwards.

The left front block assembly comprises a first sliding block which can slide up and down in the rotating seat and can be clamped with or separated from the left front groove, a second sliding block which can slide up and down in the rotating seat is arranged in the rotating seat, a first spring which can push the second sliding block to move downwards with the first sliding block when the second sliding block is aligned with the left side groove is arranged between the second sliding block and the rotating seat, and a second spring which can push the first sliding block to slide upwards and be clamped with the left front groove when the lower end of the second sliding block is separated from the left side groove is arranged between the rotating seat and the first sliding block; the left rear block assembly comprises a third sliding block which can slide up and down in the rotating seat and can be clamped with or separated from the left rear groove, a fourth sliding block which can slide up and down in the rotating seat is arranged in the rotating seat, a third spring which can push the fourth sliding block to move downwards with the third sliding block when the fourth sliding block is aligned with the right side groove is arranged between the fourth sliding block and the rotating seat, and a fourth spring which can push the third sliding block to slide upwards and be clamped with the left rear groove when the lower end of the fourth sliding block is separated from the right side groove is arranged between the rotating seat and the third sliding block; the right front block component comprises a fifth sliding block which can slide up and down in the rotating seat and can be clamped with or separated from the right front groove, a sixth sliding block which can slide up and down in the rotating seat is arranged in the rotating seat, a fifth spring which can push the sixth sliding block to move downwards with the fifth sliding block when the sixth sliding block is aligned with the right side groove is arranged between the sixth sliding block and the rotating seat, and a sixth spring which can push the fifth sliding block to slide upwards and be clamped with the right front groove when the lower end of the sixth sliding block is separated from the right side groove is arranged between the rotating seat and the fifth sliding block; the right rear block component comprises a seventh sliding block which can slide up and down in the rotating seat and can be clamped with or separated from the right rear groove, an eighth sliding block which can slide up and down in the rotating seat is arranged in the rotating seat, a seventh spring which can push the eighth sliding block to move downwards with the seventh sliding block when the eighth sliding block is aligned with the left groove is arranged between the eighth sliding block and the rotating seat, and an eighth spring which can push the seventh sliding block to slide upwards and be clamped with the right rear groove when the lower end of the eighth sliding block is separated from the left groove is arranged between the rotating seat and the seventh sliding block.

The third locking mechanism comprises a locking hole arranged on the base, a locking block capable of sliding up and down in the locking hole to separate from or lock with the locking hole is arranged in the rotating seat, the transmission part comprises a driving block capable of sliding up and down in the rotating seat, the transmission part further comprises a fixing block fixed in the rotating seat, a transverse bar-shaped hole is arranged on the fixing block, a first inclined hole is arranged on the locking block, a driving shaft is arranged in the driving block in a penetrating manner in the first inclined hole, the second inclined hole and the bar-shaped hole, when the driving block slides downwards relative to the rotating seat to enable the wall of the second inclined hole to push the driving shaft, the driving shaft pushes the wall of the first inclined hole to enable the locking block to move upwards to separate from the locking hole, a ninth spring capable of pushing the driving block to reset upwards is further arranged between the locking block and the driving block, a driving inclined surface is arranged at the upper end of the driving block, and a protruding part protruding outwards and capable of pushing the driving inclined surface to enable the driving block to slide downwards when the pushing rod component rotates to a vertical state is arranged at the lower end of the pushing rod component.

The first locking mechanism comprises a right connecting seat arranged at the lower end of the push rod assembly, a right side seat body matched with the right connecting seat is arranged on the rotating seat, a plurality of clamping grooves are formed in the right connecting seat and the right side seat body along the circumferential direction, a spline capable of transversely moving in the space enclosed by the right connecting seat and the right side seat body and simultaneously clamping with the clamping grooves on the right connecting seat and the right side seat body is arranged in the space enclosed by the right connecting seat and the right side seat body, a pushing seat capable of transversely moving to push the spline to separate from the clamping grooves on the right side seat body is further arranged at the lower end of the push rod assembly, a pull rope capable of pulling the pushing seat to transversely move is arranged in the push rod assembly, a sliding sleeve capable of sliding relatively and connected with the pull rope is arranged outside the push rod assembly, and a thirteenth spring capable of pushing the spline to reset is further arranged between the right connecting seat and the spline.

The bottom support frame comprises a front frame, a base is arranged at the upper end of the front frame, a rear frame is rotatably connected to the base, a fourth locking mechanism is arranged between the front frame and the rear frame and comprises a locking groove arranged on the rear frame, a sliding pin capable of transversely moving and being clamped or separated from the locking groove is arranged in the base, a sliding block capable of sliding relative to the base is further arranged in the base, an inclined surface which is abutted against the sliding pin is arranged on the sliding block, a lifting handle capable of rotating relative to the sliding block is arranged on the rear frame, a pushing part capable of pushing the sliding block to slide when the lifting handle rotates relative to the rear frame is arranged on the lifting handle, a pushing inclined surface which can be abutted against the sliding pin and can push the sliding pin to separate from the locking groove when the lifting handle lifts the child trolley is further arranged in the locking groove, and a fourteenth spring for pushing the sliding block to reset is further arranged between the base and the sliding block.

The seat board is connected with a backrest, a clamping structure is arranged between the backrest and the seat board, the clamping structure comprises a first clamping groove which is arranged on the seat board along the circumferential direction, a second clamping groove is arranged on the backrest along the circumferential direction, a clamping piece which can transversely move in the space formed by the seat board and the backrest and can be simultaneously clamped with the first clamping groove and the second clamping groove is arranged in the space formed by the seat board and the backrest, a fifteenth spring which can push the clamping piece to reset is also arranged between the backrest and the clamping piece, a rotating block which can push the clamping piece to be separated from the first clamping groove during rotation is arranged between the clamping piece and the seat board, an operation switch is arranged on the backrest, and a stay wire which can pull the rotating block to rotate is arranged between the operation switch and the rotating block.

The front side and the rear side of the base are respectively provided with a notch, the front side and the rear side of the rotating seat are respectively provided with a clamping block which can be clamped with the corresponding notches when the rotating seat rotates to a set position, and a sixteenth spring which can push the clamping block to reset is arranged between the clamping block and the rotating seat.

Compared with the prior art, the utility model has the following advantages:

1. the rotating seat of the children handcart can rotate in the horizontal plane relative to the base, and the seat assembly and the push rod assembly are arranged on the rotating seat, so that when the push rod assembly rotates to a vertical state, the push rod assembly can drive the rotating seat to rotate in the horizontal plane, the purpose of reversing the front and back direction of the seat assembly is achieved, the seat assembly is not required to be disassembled and then installed, and the front and back direction of the seat assembly is convenient and rapid. And when the push rod assembly rotates forwards to a vertical state, the push rod assembly can unlock a third locking mechanism between the rotating seat and the base through the transmission part, so that linkage unlocking is realized, and front and back reversing operation of the seat assembly is convenient.

2. The control assembly of the child stroller can prevent the push rod assembly in the vertical state from rotating forwards no matter in the forward direction or the reverse direction, so that a user is prevented from tilting forwards due to careless operation when the push rod assembly rotates forwards in the rear direction of the child stroller, safety can be ensured, and meanwhile, the push rod assembly cannot continue to rotate forwards in the vertical state, so that the push rod assembly is positioned, and smooth front-back reversing of the seat assembly in the horizontal plane direction is ensured by the push rod assembly. And, the control assembly can ensure that the push rod assembly is not blocked from rotating backwards when the seat assembly is in the forward direction or the reverse direction, so that the push rod assembly can not rotate forwards but can rotate backwards to a position capable of pushing the baby stroller after the seat assembly is reversed.

3. In the process of rotating the seat assembly of the child stroller in the horizontal plane direction, the control assembly can enable the push rod assembly and the rotating seat to be relatively fixed, namely, the push rod assembly cannot rotate in any direction relative to the rotating seat, so that the push rod assembly and the rotating seat can be used as a whole to drive the seat assembly to rotate and change direction in the horizontal plane direction, the condition that the push rod assembly swings due to uneven stress in the process of changing the direction of the seat assembly is avoided, and smooth front-back changing of the seat assembly is further ensured.

[ description of the drawings ]

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a side view of the present utility model with the seat assembly in the forward position;

FIG. 3 is a side view of the push rod assembly of the present utility model in an upright position;

FIG. 4 is a front-to-back side view of the seat assembly of the present utility model;

FIG. 5 is a side view of the present seat assembly with the push rod assembly reversed and the push rod assembly returned to its original position;

FIG. 6 is a perspective view of the folded state of the present utility model;

FIG. 7 is one of the perspective views of the components of the present utility model;

FIG. 8 is one of the exploded views of the components of the present utility model;

FIG. 9 is a second exploded view of the components of the present utility model;

FIG. 10 is a second perspective view of the component of the present utility model;

FIG. 11 is a third perspective view of the components of the present utility model;

FIG. 12 is a third exploded view of the components of the present utility model;

FIG. 13 is a fourth perspective view of the components of the present utility model;

FIG. 14 is one of the partial cross-sectional views of the present utility model;

FIG. 15 is a second partial cross-sectional view of the present utility model;

FIG. 16 is a third partial cross-sectional view of the present utility model;

FIG. 17 is a fourth exploded view of the components of the present utility model;

FIG. 18 is a fifth exploded view of the components of the present utility model;

FIG. 19 is a fourth partial cross-sectional view of the present utility model;

FIG. 20 is a fifth partial cross-sectional view of the present utility model;

FIG. 21 is a fifth perspective view of the components of the present utility model;

FIG. 22 is a perspective view of the seat assembly of the present utility model;

FIG. 23 is a sixth exploded view of the components of the present utility model;

FIG. 24 is a seventh exploded view of the components of the present utility model;

FIG. 25 is a sixth perspective view of the components of the present utility model;

FIG. 26 is an exploded view eighth of the components of the present utility model;

fig. 27 is a nine of the exploded views of the components of the present utility model.

[ detailed description ] of the utility model

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

as shown in fig. 1 to 16, a stroller comprises a foldable bottom support frame 1 with a front wheel 1a and a rear wheel 1b, a base 11 is arranged at the upper end of the bottom support frame 1, a rotary seat 2 capable of rotating in a horizontal plane relative to the base 11 is arranged on the base 11, a push rod assembly 3 capable of rotating in a vertical plane relative to the rotary seat 2 and driving the rotary seat 2 to rotate in the horizontal plane is connected to the rotary seat 2, a seat assembly 4 capable of rotating in the vertical plane relative to the rotary seat 2 is further arranged on the rotary seat 2, the position where the seat assembly 4 stays comprises a forward direction and a reverse position where the seat assembly 2 stays after rotating 180 degrees in the horizontal plane, a first locking mechanism 5 is arranged between the push rod assembly 3 and the rotary seat 2, a second locking mechanism 6 is arranged between the seat assembly 4 and the rotary seat 2, a third locking mechanism 7 is arranged between the rotary seat 2 and the base 11, and a transmission part 8 capable of unlocking the third locking mechanism 7 when the push rod assembly 3 rotates forwards to the vertical position is arranged between the rotary seat 2. The swivel seat 2 can rotate in the horizontal plane relative to the base 11, and the seat component 4 and the push rod component 3 are arranged on the swivel seat 2, so that when the push rod component 4 rotates to a vertical state, the third locking mechanism 7 is unlocked, and the push rod component 3 can drive the swivel seat 2 to rotate in the horizontal plane, so that the purpose of reversing the direction of the seat component 4 is achieved, the seat component is not required to be detached and then installed, and the direction of the seat component 4 is convenient and rapid. Moreover, when the push rod assembly 3 rotates forwards to a vertical state, the push rod assembly 3 can unlock the third locking mechanism 7 between the rotating seat 2 and the base 11 through the transmission part 8, so that linkage unlocking is realized, and the front and back reversing operation of the seat assembly 2 is convenient. In addition, the bottom support frame 1 can be folded, and the push rod assembly 3 rotates backwards in the vertical plane relative to the rotary seat 2 to be close to the bottom support frame 1, and the seat assembly 4 rotates in the vertical plane relative to the rotary seat 2 to be close to the bottom support frame 1, so that the folding of the baby stroller can be realized, and the baby stroller is convenient to carry and store.

As shown in fig. 7 to 11, the push rod assembly 3 includes a support rod 31 and a push rod 32 connected to the upper end of the support rod 31, a left connecting seat 33 and a right connecting seat 34 are provided at the lower end of the support rod 31, a left side seat 21 connected to the left connecting seat 33 and a right side seat 22 connected to the right connecting seat 34 are provided on the rotating seat 2, a connecting groove 23 is provided between the left side seat 21 and the right side seat 22, the seat assembly 4 includes a seat plate 41 and a protruding seat 42 provided at the lower side of the seat plate 41, the protruding seat 42 is located in the connecting groove 23 and connected to the left side seat 21 and the right side seat 22, and the left connecting seat 33, the left side seat 21, the protruding seat 42, the right side seat 22 and the right connecting seat 34 are coaxially and rotatably connected.

As shown in fig. 12, 13, 15 and 16, a control assembly 9 capable of preventing the push rod assembly 3 in the vertical state from rotating forwards and ensuring the push rod assembly 3 in the vertical state from rotating backwards when the seat assembly 4 is in the forward direction or the reverse direction is further arranged between the push rod assembly 3 and the rotary seat 2. The control assembly 9 can prevent the push rod assembly 3 in the vertical state from rotating forwards no matter when the seat assembly 4 is in the forward direction or the reverse direction, so that the safety can be ensured by avoiding the push rod assembly 3 from being suddenly and unexpectedly rotated when a user rotates the push rod assembly 3 forwards in the rear direction of the baby carriage, and meanwhile, the push rod assembly 3 cannot continue to rotate forwards in the vertical state, so that the push rod assembly 3 is positioned, and the user is ensured to smoothly commutate forwards and backwards in the horizontal plane direction by operating the seat assembly 4 through the push rod assembly 3. Also, the control assembly 9 ensures that the push rod assembly 3 is not obstructed from rotating rearward, either in the forward or reverse position, of the seat assembly 4, so that the push rod assembly 3 cannot rotate forward but can rotate rearward to a position to push the stroller after reversing of the seat assembly 4 is completed.

As shown in fig. 11 to 18, the control unit 9 includes a left front groove 91 and a left rear groove 92 concavely provided on the outer peripheral surface of the left connecting seat 33, the control unit 9 further includes a right front groove 93 and a right rear groove 94 provided on the outer peripheral surface of the right connecting seat 34, a left front block unit 95, a left rear block unit 96, a right front block unit 97 and a right rear block unit 98 capable of sliding up and down therein are provided in the rotating seat 2, a left side groove 12 capable of being engaged with the left front block unit 95 and the right rear block unit 98 and a right side groove 13 capable of being engaged with the left rear block unit 96 and the right front block unit 97 are provided on the base 11 in the circumferential direction, the left front groove 91, the left rear groove 92, the right front groove 93 and the right rear groove 94 are provided with straight groove walls 9a and chute walls 9b opposite to the corresponding straight groove walls 9a, when the stroller is in a pushing state, the outer peripheral surfaces of the left connecting seat 33 and the right connecting seat 34 push against the upper ends of the left front block assembly 95, the left rear block assembly 96, the right front block assembly 97 and the right rear block assembly 98 so that the left front block assembly 95, the left rear block assembly 96, the right front block assembly 97 and the right rear block assembly 98 are separated from the corresponding left front groove 91, the left rear groove 92, the right front groove 93 and the right rear groove 94, the lower ends of the left front block assembly 95 fall into the left side groove 12, and the lower ends of the right front block assembly 97 fall into the right side groove 13; when the first locking mechanism 5 is unlocked and the push rod assembly 3 rotates forward to a vertical state, the left front block assembly 95 keeps disengaged from the left front groove 91 and the left rear block assembly 96 keeps engaged with the left rear groove 92, the right front block assembly 97 keeps disengaged from the right front groove 93 and the right rear block assembly 98 keeps engaged with the right rear groove 94, and the straight groove wall 9a of the left rear groove 92 and the straight groove wall 9a of the right rear groove 94 respectively block the left rear block assembly 96 and the right rear block assembly 98 to prevent the push rod assembly 3 from continuing to rotate forward; in the process that the push rod assembly 3 is in a vertical state and drives the rotary seat 2 to rotate in the horizontal plane, the lower end of the left front block assembly 95 is separated from the left side groove 12, the upper end of the left front block assembly is separated from the right side groove 13, the upper end of the right front block assembly 97 is separated from the right side groove 13, the upper end of the right front block assembly is introduced into the right front groove 93, the left rear groove 92 is kept in clamping with the left rear block assembly 96, the right rear groove 94 is kept in clamping with the right rear block assembly 98, and the straight groove wall 9a of the left front groove 91 and the straight groove wall 9a of the right front groove 93 respectively block the left front block assembly 95 and the right front block assembly 97 to prevent the push rod assembly 3 from rotating; when the push rod assembly 3 is rotated 180 degrees with the rotating base 2, the left front block assembly 95 is located in the left front groove 91, the lower end of the left rear block assembly 96 enters the right side groove 13, the upper end of the left rear block assembly 96 is separated from the left rear groove 92, the right front block assembly 97 is located in the right front groove 93, the lower end of the right rear block assembly 98 enters the left side groove 12, the upper end of the right rear block assembly 98 is separated from the right rear groove 94, and the straight groove wall 9a of the left front groove 91 and the straight groove wall 9a of the right front groove 93 respectively block the left front block assembly 95 and the right front block assembly 97 to prevent the push rod assembly 3 from rotating forwards. When the push rod assembly 3 is in the initial position where the stroller can be pushed, the left front block assembly 95 is disengaged from the left front slot 91, the left rear block assembly 96 is disengaged from the left rear slot 92, the right front block assembly 97 is disengaged from the right front slot 93, and the right rear block assembly 98 is disengaged from the right rear slot 94. When it is necessary to reverse the seat assembly 4 back and forth, the first locking mechanism 5 is first unlocked, then the push rod assembly 3 is rotated forward to the vertical position, when the push rod assembly 3 reaches the vertical position, the push rod assembly 3 unlocks the third locking mechanism 7 through the transmission member 8, and at this time the right rear block assembly 98 enters the right rear slot 94, the left rear block assembly 96 enters the left rear slot 92, the push rod assembly 3 cannot continue to rotate forward because the straight slot walls 9a of the left rear slot 92 and the right rear slot 94 block the left rear block assembly 96 and the right rear block assembly 98, and because the left rear slot 92 and the right rear slot 94 have the inclined slot walls 9b, even if the right rear block assembly 98 enters the right rear slot 94, the left rear block assembly 96 enters the left rear slot 92, as long as a force is applied to the push rod assembly 3, the push rod assembly 3 can be rotated backward by the left rear block assembly 96 and the right rear block assembly 98 being pressed against the corresponding inclined slot walls 9 b. When the vertical push rod assembly 3 rotates in the horizontal plane direction with the seat assembly 4 and the rotating seat 2, the left front block assembly 95 is separated from the left side groove 12 and enters the left front groove 91, the right front block assembly 97 is separated from the right side groove 12 and enters the right front groove 93, meanwhile, the right rear block assembly 98 is still located in the right rear groove 94, and the left rear block assembly 96 is still located in the left rear groove 92, so that the left front block assembly 95, the right front block assembly 97, the right rear block assembly 98 and the left rear block assembly 96 are abutted against the corresponding straight groove walls 9a, so that the push rod assembly 3 cannot rotate in the vertical plane relative to the rotating seat 2, and the seat assembly 4 is stable and reliable in the reversing process. When the seat assembly 4 is rotated and reversed, the right rear block assembly 98 enters the left side groove 12 and is separated from the right rear groove 94, the left rear block assembly 96 enters the right side groove 13 and is separated from the left rear groove 92, at this time, the left front block assembly 95 is kept engaged with the left front groove 91, the right front block assembly 97 is kept engaged with the right front groove 93, and since the rotating seat 2 rotates 180 degrees in the horizontal plane direction, the left front block assembly 95 and the right front block assembly 97 abut against the corresponding straight groove wall 9a so that the push rod assembly 3 cannot rotate forward of the stroller, but the push rod assembly 3 can rotate backward of the stroller to a position capable of pushing the stroller by pressing the inclined groove wall 9b against the left front block assembly 95 and the right front block assembly 97.

As shown in fig. 11 to 13 and 15 to 18, the left front block assembly 95 includes a first slider 951 capable of sliding up and down in the rotating base 2 and engaging with or disengaging from the left front groove 91, a second slider 952 capable of sliding up and down in the rotating base 2 is provided in the rotating base 2, a first spring 95a capable of pushing the second slider 952 to move downward with the first slider 951 when the second slider 952 is aligned with the left side groove 12 is provided between the second slider 952 and the rotating base, and a second spring 95b capable of pushing the first slider 951 to slide upward and engage with the left front groove 91 when the lower end of the second slider 952 is disengaged from the left side groove 12 is provided between the rotating base 2 and the first slider 951; the left rear block assembly 96 comprises a third slider 963 capable of sliding up and down in the rotary seat 2 and being engaged with or disengaged from the left rear groove 92, a fourth slider 964 capable of sliding up and down in the rotary seat 2 is arranged in the rotary seat 2, a third spring 96a capable of pushing the fourth slider 964 to move downwards with the third slider 963 when the fourth slider 964 is aligned with the right side groove 13 is arranged between the fourth slider 964 and the rotary seat 2, and a fourth spring 96b capable of pushing the third slider 963 to slide upwards and be engaged with the left rear groove 92 when the lower end of the fourth slider 964 is disengaged from the right side groove 13 is arranged between the rotary seat 2 and the third slider 963; the right front block assembly 97 includes a fifth slider 975 capable of sliding up and down in the rotary seat 2 and engaging with or disengaging from the right front groove 93, a sixth slider 976 capable of sliding up and down in the rotary seat 2 is provided in the rotary seat 2, a fifth spring 97a capable of pushing the sixth slider 976 to move downward with the fifth slider 975 when the sixth slider 976 is aligned with the right side groove 13 is provided between the sixth slider 976 and the rotary seat 2, and a sixth spring 97b capable of pushing the fifth slider 975 to slide upward and engage with the right front groove 93 when the lower end of the sixth slider 976 is disengaged from the right side groove 13 is provided between the rotary seat 2 and the fifth slider 975; the right rear block assembly 98 includes a seventh slider 987 which slides up and down in the rotary seat 2 and is engageable with or disengageable from the right rear slot 94, an eighth slider 988 which slides up and down in the rotary seat 2 is provided in the rotary seat 2, a seventh spring 98a which urges the eighth slider 988 to move downward with the seventh slider 987 when the eighth slider 988 is aligned with the left side slot 12 is provided between the eighth slider 988 and the rotary seat 2, and an eighth spring 98b which urges the seventh slider 987 to slide upward to engage with the right rear slot 94 when the lower end of the eighth slider 988 is disengaged from the left side slot 12 is provided between the rotary seat 2 and the seventh slider 987.

As shown in fig. 11 to 13 and 15 to 18, when the push rod assembly 3 is in the initial position where the stroller can be pushed, the second spring 95b, the fourth spring 96b, the sixth spring 97b, and the eighth spring 98b are all in a compressed state because the left front groove 91 is displaced from the left front block assembly 95, the left rear groove 92 is displaced from the left rear block assembly 96, the right front groove 93 is displaced from the right front block assembly 97, and the right rear groove 94 is displaced from the right rear block assembly 98. When the push rod assembly 3 rotates forwards to a vertical state, the left front groove 91 is opposite to the left front block assembly 95, the left rear groove 92 is opposite to the left rear block assembly 96, the right front groove 93 is opposite to the right front block assembly 97, and the right rear groove 94 is opposite to the right rear block assembly 98, because the lower end of the left front block assembly 95 is located in the left side groove 12, the second slider 952 pushes down the first slider 951 downwards under the action of the first spring 95a, so that the first slider 951 keeps separating from the left front groove 91, the second spring 95b is still in a compressed state, that is, the left front block assembly 95 keeps separating from the left front groove 91, the right front block assembly 97 keeps separating from the right front groove 93, but at this time, because there is no concave groove-shaped structure on the base 11 and the lower ends of the left rear block assembly 96 and the right rear block assembly 98, a space allowing the third slider 963 to move upwards exists between the fourth slider 964 and the third slider 963, a space allowing the eighth slider 988 to push the seventh slider 987 to move upwards, and the left rear block assembly 92 can push the right rear block assembly 92 to be aligned with the left rear block assembly 98, and the right rear block assembly 98 can be aligned with the left rear end 98, and the right rear block assembly 98 can be pushed upwards, and the left rear block assembly 98b can be aligned with the left rear end 98 and right rear block assembly 98 can be aligned with the left rear end 98 when the left and right rear block assembly 98 is pushed upwards.

As shown in fig. 11 to 13 and 15 to 18, when the vertical push rod assembly 2 rotates along the horizontal plane with the rotating seat 2, the lower end of the left front block assembly 95 is separated from the left side groove 12 on the base 11, and the lower end of the right front block assembly 97 is separated from the right side groove 13 on the base 11, so that the second slider 952 moves upward to compress the first spring 95a, and at this time, the second spring 95b pushes the first slider 951 to move upward to engage with the left front groove 91, so as to engage the upper end of the left front block assembly 95 with the left front groove 91, and the upper end of the right front block assembly 97 engages with the right front groove 93. Therefore, during the forward and backward reversing rotation of the seat assembly 4, the left front block assembly 95 is engaged with the left front groove 91, the left rear block assembly 96 is engaged with the left rear groove 92, the right front block assembly 97 is engaged with the right front groove 93, and the right rear block assembly 98 is engaged with the right rear groove 94, so that the push rod assembly 3 cannot rotate in the vertical plane relative to the rotating seat 2.

When the seat assembly 4 is reversed, the lower end of the right rear block assembly 98 is opposite to the left side groove 12, the lower end of the left rear block assembly 96 is opposite to the right side groove 13, and therefore, the eighth slider 988 moves down into the left side groove 12, the seventh slider 987 is pushed by the eighth slider 988 to disengage from the right rear groove 94, i.e. the upper end of the right rear block assembly 98 is disengaged from the right rear groove 94, and similarly, the left rear block assembly 96 is disengaged from the left rear groove 92, and at this time the left front block assembly 95 remains engaged with the left front groove 91, and the right front block assembly 97 remains engaged with the right front groove 93, so that the push rod assembly 3 cannot rotate forward of the stroller, but can rotate backward to a position where the stroller can be pushed.

As shown in fig. 11 to 14, the third locking mechanism 7 includes a locking hole 71 provided on the base 11, a locking block 72 capable of sliding up and down in the locking hole 71 and disengaging from or locking the locking hole 71 is provided in the rotating base 2, the transmission member 8 includes a driving block 81 capable of sliding up and down in the rotating base 2, the transmission member 8 further includes a fixing block 82 fixed in the rotating base 2, a transverse bar-shaped hole 83 is provided on the fixing block 82, a first inclined hole 84 is provided on the locking block 72, a second inclined hole 85 is provided on the driving block 81, a driving shaft 86 is provided in the first inclined hole 84, the second inclined hole 85 and the bar-shaped hole 83, and when the driving block 81 slides down relative to the rotating base 2 to push the driving shaft 86, the driving shaft 86 pushes the first inclined hole 84 to move up and disengage from the locking hole 71, a ninth spring 87 capable of pushing the driving block 81 to reset up is provided between the locking block 72 and the driving block 81, a driving inclined surface 88 is provided on the upper end of the driving block 81, and a push rod assembly 3 is provided on the lower end thereof with a push rod assembly 3 capable of pushing the push rod 88 to rotate to a vertical inclined surface to a push rod 88 when the push rod assembly is pushed down. When the seat assembly 4 is required to be reversed, the first locking mechanism 5 is unlocked firstly, then the push rod assembly 3 is rotated forwards, the protruding part 89 on the push rod assembly 3 pushes against the driving inclined surface 88, the driving block 81 moves downwards, the hole wall of the second inclined hole 85 on the driving block 81 pushes the driving shaft 86, the driving shaft 86 slides in the strip-shaped hole 83 and pushes the hole wall of the first inclined hole 84, so that the locking block 72 moves upwards to be separated from the locking hole 71, and unlocking of the third locking mechanism 7 is realized.

As shown in fig. 10 and 14, fig. 26 and 27, the second locking mechanism 6 comprises a locking hole 61 formed at the upper end of the rotary seat 2, the protruding seat 42 is rotatably connected with the rotary seat 2, a locking block 62 which can slide up and down relative to the seat 41 and is engaged with or disengaged from the locking hole 61 is further arranged on the seat 41, a backrest 43 which can be unfolded or folded relative to the seat 41 is further connected to the seat 41, a linkage assembly which can disengage the locking block 62 from the locking hole 61 when the backrest 43 is folded relative to the seat 41 is arranged between the backrest 43 and the locking block 62, the linkage assembly comprises a swinging rod 63 which is rotatably connected to the seat 41, a bump 64 which can push the swinging rod 63 to swing when the backrest 43 is folded relative to the seat 41 is arranged on the backrest 43, a sliding seat 65 which can slide relative to the seat 41 is arranged at the lower end of the swinging rod 63, a sliding seat 67 which is connected with the sliding seat 65 through a stay rope 66 is arranged in the middle of the sliding seat 41, a slope 68 which can push the locking block 62 and the locking hole 61 when the backrest 43 slides relative to the seat 41 is arranged on the seat 67, a restoring spring block 62 which can push the sliding seat 67 and the seat 41 to disengage, and a restoring spring 60 which can restore the seat 62 is arranged between the sliding seat 67 and the sliding seat 41. When the backrest 43 is rotated and folded, the swing rod 63 is pushed by the lug 64 which rotates along with the backrest 43, the sliding seat 65 is pushed to slide in the swing process by the swing rod 63, the sliding seat 67 is pulled to slide by the stay rope 66 in the sliding process by the sliding seat 65, the locking block 62 is pushed by the slope 68 on the sliding seat 67 in the sliding process, the locking block 62 is separated from the locking hole 61, so that unlocking between the seat assembly 4 and the rotating seat 2 is realized, and at the moment, the seat assembly 4 can rotate relative to the rotating seat 2 in a vertical plane to be close and folded on the bottom supporting frame 1.

As shown in fig. 23, 25 and 27, a U-shaped front armrest 44 rotatably connected to the backrest 43 and the seat board 41 is further provided between the backrest 41 and the seat board 41, a locking groove 451 is provided in the seat board 41, a locking lever 452 capable of sliding in the front armrest 44 and locking or releasing from the locking groove 451 is provided in the front armrest 44, a pushing portion 453 capable of pushing the locking lever 452 to release from the locking groove 451 when the backrest 43 is folded and rotated relative to the seat board 41 is provided on the backrest 43, and a twelfth spring 454 capable of pushing the locking lever 452 to slide and reset is provided in the front armrest 44. When the backrest 43 is rotated and folded relative to the seat plate 41, the pushing part 453 moves along with the backrest 43, the pushing part 453 pushes the clamping rod 452 out of the clamping groove 451 on the seat plate 41, and at this time, the front armrest 44 is unlocked from the seat plate 41, and the front armrest 44 can be rotated and moved close to the seat plate 41.

As shown in fig. 8, the first locking mechanism 5 includes a right connecting seat 34 disposed at the lower end of the push rod assembly 3, a right side seat 22 engaged with the right connecting seat 34 is disposed on the rotating seat 2, a plurality of engaging grooves 51 are disposed on the right connecting seat 34 and the right side seat 22 along the circumferential direction, a spline 52 capable of moving laterally in the space enclosed by the right connecting seat 34 and the right side seat 22 and simultaneously engaging with the engaging grooves 51 on the right connecting seat 34 and the right side seat 22 is disposed in the space enclosed by the right connecting seat 34 and the right side seat 22, a pushing seat 53 capable of moving laterally and pushing the spline 52 to disengage from the engaging grooves 51 on the right side seat 22 is disposed at the lower end of the push rod assembly 3, a pull rope 54 capable of pulling the pushing seat 53 to move laterally is disposed in the push rod assembly 3, a sliding sleeve 55 capable of sliding relative to the push rod assembly and connected with the pull rope 54 is disposed at the outer side of the push rod assembly 3, and a thirteenth spring 56 capable of pushing the spline 52 to reset is disposed between the right connecting seat 34 and the spline 52. When the first locking mechanism 5 is unlocked, the sliding sleeve 55 is pulled, the sliding sleeve 55 pulls the pushing seat 53 to move transversely through the pull rope 54, the pushing seat 53 pushes the spline 52 to be separated from the clamping groove 51 on the right seat 22, and at the moment, the push rod assembly 3 can rotate in the vertical plane relative to the rotating seat 2. In this embodiment, a locking member having the same structure as the first locking mechanism 5 is provided between the left connection seat 33 and the left-side seat body 21 to ensure firm locking.

As shown in fig. 18 to 21, the bottom bracket 1 includes a front frame 14, a base 11 is provided at an upper end of the front frame 14, a rear frame 15 is rotatably connected to the base 11, a fourth locking mechanism is provided between the front frame 14 and the rear frame 15, the fourth locking mechanism includes a locking groove 161 provided on the rear frame 15, a sliding pin 162 capable of moving laterally and engaging with or disengaging from the locking groove 161 is provided in the base 11, a sliding block 163 capable of sliding relative to the base 11 is provided in the base 11, an inclined surface 164 abutting against the sliding pin 162 is provided on the sliding block 163, a handle 17 capable of rotating relative to the rear frame 15 is provided on the rear frame 15, a pushing portion 165 capable of pushing the sliding block 163 to slide when the handle 17 rotates relative to the rear frame 15 is provided on the handle 17, a pushing inclined surface 166 capable of abutting against the sliding pin 162 and pushing the sliding pin 162 to disengage from the locking groove 161 when the handle 17 lifts the child, and a fourteenth spring 167 for restoring the sliding block 163 is provided between the base 11 and the sliding block 163. When the stroller is folded, the first locking mechanism 5 is unlocked firstly, the push rod assembly 3 rotates backwards to lean against the rear frame 15, then the backrest 43 and the front handrail 44 rotate to be close to the seat board 41, in the process, the second locking mechanism 6 between the seat board 41 and the rotating seat 2 is unlocked, the seat assembly 4 rotates forwards to be close to the front frame 14, then the handle 17 is rotated and the whole stroller is lifted, the handle 17 slides against the sliding block 163 in the rotating process of the rear frame 15, the inclined surface 164 on the sliding block 163 slides to no longer push the sliding pin 162, and when the stroller is lifted, the front frame 14 and the rear frame 15 rotate relatively under the action of gravity to be close together, and in the process, the pushing inclined surface 166 on the rear frame 15 pushes the sliding pin 162 to retreat to be separated from the locking groove 161.

As shown in fig. 23 and 24, a backrest is connected to the seat plate, an engagement structure is provided between the backrest and the seat plate, the engagement structure includes a first engagement groove 461 provided on the seat plate 41 along a circumferential direction, a second engagement groove 462 provided on the backrest 43 along a circumferential direction, an engagement member 463 capable of moving laterally in the space surrounded by the seat plate 41 and the backrest 43 and simultaneously engaging with the first engagement groove 461 and the second engagement groove 462 is provided in the space surrounded by the seat plate 41 and the backrest 43, a fifteenth spring 464 capable of pushing the engagement member 463 to return is further provided between the backrest 43 and the engagement member 463, a rotating block 465 capable of pushing the engagement member 463 to disengage from the first engagement groove 461 when rotating is provided between the engagement member 463 and the seat plate 41, and a pull wire 466 capable of pulling the rotating block 465 is provided between the operating switch and the rotating block 465. When the operation switch is operated, the stay 466 pulls the rotating block 465 to rotate, and the rotating block 465 pushes the engaging member 463 to disengage from the first engaging groove 461 on the seat board 41 when rotating, and at this time, the backrest 43 can be rotated and folded relative to the seat board 41. The rotation of the rotating block 465 and the engaging member 463 can be converted into the lateral movement of the engaging member 463 by the abutting structure of the inclined surface and the inclined surface in the prior art.

As shown in fig. 12 and 18, the front side and the rear side of the base 11 are respectively provided with a notch 18, the front side and the rear side of the rotating seat 2 are provided with a clamping block 19 which can be clamped with the corresponding notch 18 when the rotating seat rotates to a set position, and a sixteenth spring 10 which can push the clamping block 19 to reset is arranged between the clamping block 19 and the rotating seat 2. The catch 19 engages with the corresponding recess 18 when the seat assembly 4 is in the forward or reverse position for better positioning and the sixteenth spring 10 pushes the catch 19 into the recess 18 when the seat assembly 4 is reversed into position to provide a sound to alert the user that the seat assembly 4 has been rotated into position.

Claims (10)

1. A child stroller, characterized in that: including collapsible bottom sprag frame (1) with front wheel (1 a) and rear wheel (1 b), bottom sprag frame (1) upper end be equipped with base (11), base (11) on be equipped with relative its swivel mount (2) that rotates in the horizontal plane, swivel mount (2) on be connected with relative its rotatory push rod subassembly (3) in the horizontal plane that can drive swivel mount (2) in vertical plane, swivel mount (2) on still be equipped with relative its rotatory seat subassembly (4) in vertical plane, seat subassembly (4) the position that stops include forward oriented and follow swivel mount (2) the reverse position that is stopped after rotatory 180 degrees in the horizontal plane, push rod subassembly (3) and swivel mount (2) between be equipped with first locking mechanical system (5), seat subassembly (4) and swivel mount (2) between be equipped with second locking mechanical system (6), swivel mount (2) and base (11) between be equipped with third locking mechanical system (7) to the position that can make between push rod subassembly (3) and vertical swivel mount (3) rotate forward to the transmission part (8).

2. The stroller of claim 1, wherein: push rod subassembly (3) include bracing piece (31) and connect push rod (32) in bracing piece (31) upper end, bracing piece (31) lower extreme be equipped with left connecting seat (33) and right connecting seat (34), roating seat (2) on be equipped with left side pedestal (21) and right side pedestal (22) of being connected with left connecting seat (33), left side pedestal (21) and right side pedestal (22) between be equipped with spread groove (23), seat subassembly (4) include bedplate (41) and establish projecting seat (42) in bedplate (41) downside, projecting seat (42) be in spread groove (23) and be connected with left side pedestal (21) and right side pedestal (22), left side pedestal (33), left side pedestal (21), projecting seat (42), right side pedestal (22) and right connecting seat (34) coaxial rotatable coupling.

3. The stroller of claim 2, wherein: and a control assembly (9) which can prevent the push rod assembly (3) in the vertical state from rotating forwards and ensure the push rod assembly (3) in the vertical state to rotate backwards when the seat assembly (4) is in the forward direction or the reverse direction is also arranged between the push rod assembly (3) and the rotary seat (2).

4. A stroller according to claim 3, wherein: the control assembly (9) comprises a left front groove (91) and a left rear groove (92) which are concavely arranged on the outer peripheral surface of the left connecting seat (33), the control assembly (9) further comprises a right front groove (93) and a right rear groove (94) which are arranged on the outer peripheral surface of the right connecting seat (34), the rotating seat (2) is internally provided with a left front block assembly (95), a left rear block assembly (96), a right front block assembly (97) and a right rear block assembly (98) which can slide up and down in the rotating seat, the base (11) is provided with a left side groove (12) which can be matched with the left front block assembly (95) and the right rear block assembly (98) along the circumferential direction, and a right side groove (13) which can be matched with the left rear block assembly (96) and the right front block assembly (97), the left front groove (91), the left rear groove (92), the right front groove (93) and the right rear groove (94) are provided with straight groove walls (9 a) and a wall (9 b) which is opposite to the corresponding straight groove walls (9 a), and the left side groove (96) are positioned at the front end of the connecting seat (95), the left rear block assembly (96) and the front block assembly (95) when the left front block assembly (95) and the right block assembly (96) are pushed against the front end of the connecting seat (33) and the right front block assembly (95) The right front block assembly (97) and the right rear block assembly (98) are separated from the corresponding left front groove (91), left rear groove (92), right front groove (93) and right rear groove (94), the lower end of the left front block assembly (95) falls into the left side groove (12), and the lower end of the right front block assembly (97) falls into the right side groove (13); when the first locking mechanism (5) is unlocked and the push rod assembly (3) rotates forwards to a vertical state, the left front block assembly (95) is kept separate from the left front groove (91) and the left rear block assembly (96) is kept clamped with the left rear groove (92), the right front block assembly (97) is kept separate from the right front groove (93) and the right rear block assembly (98) is kept clamped with the right rear groove (94), and the straight groove walls (9 a) of the left rear groove (92) and the straight groove walls (9 a) of the right rear groove (94) respectively block the left rear block assembly (96) and the right rear block assembly (98) to prevent the push rod assembly (3) from continuing to rotate forwards; in the process that the push rod assembly (3) is in a vertical state and drives the rotating seat (2) to rotate in a horizontal plane, the lower end of the left front block assembly (95) is separated from the left side groove (12), the upper end of the left front block assembly enters the left front groove (91), the lower end of the right front block assembly (97) is separated from the right side groove (13), the upper end of the right front block assembly enters the right front groove (93), the left rear groove (92) is kept clamped with the left rear block assembly (96) and the right rear groove (94) is kept clamped with the right rear block assembly (98), and the straight groove walls (9 a) of the left front groove (91) and the right front groove (93) respectively block the left front block assembly (95) and the right front block assembly (97) to prevent the push rod assembly (3) from rotating; when the push rod assembly (3) is rotated 180 degrees with the rotating seat (2), the left front block assembly (95) is located in the left front groove (91), the lower end of the left rear block assembly (96) enters the right side groove (13) and the upper end of the left rear block assembly (96) is separated from the left rear groove (92), the right front block assembly (97) is located in the right front groove (93) and the lower end of the right rear block assembly (98) enters the left side groove (12) and the upper end of the right rear block assembly (98) is separated from the right rear groove (94), and the straight groove wall (9 a) of the left front groove (91) and the straight groove wall (9 a) of the right front groove (93) respectively block the left front block assembly (95) and the right front block assembly (97) to prevent the push rod assembly (3) from rotating forwards.

5. The stroller of claim 4, wherein: the left front block assembly (95) comprises a first sliding block (951) which can slide up and down in a rotating seat (2) and can be clamped with or separated from a left front groove (91), a second sliding block (952) which can slide up and down in the rotating seat is arranged in the rotating seat (2), a first spring (95 a) which can push the second sliding block (952) to move downwards with the first sliding block (951) when the second sliding block (952) is aligned with the left side groove (12) is arranged between the second sliding block (952) and the rotating seat (), and a second spring (95 b) which can push the first sliding block (951) to slide upwards and be clamped with the left front groove (91) when the lower end of the second sliding block (952) is separated from the left side groove (12) is arranged between the rotating seat (2) and the first sliding block (951); the left rear block assembly (96) comprises a third sliding block (963) which can slide up and down in the rotating seat (2) and can be clamped with or separated from the left rear groove (92), a fourth sliding block (964) which can slide up and down in the rotating seat (2) is arranged in the rotating seat, a third spring (96 a) which can push the fourth sliding block (964) to move downwards with the third sliding block (963) when the fourth sliding block (964) is aligned with the right groove (13) is arranged between the fourth sliding block (964) and the rotating seat (2), and a fourth spring (96 b) which can push the third sliding block (963) to slide upwards and be clamped with the left rear groove (92) when the lower end of the fourth sliding block (964) is separated from the right groove (13) is arranged between the rotating seat (2) and the third sliding block (963); the right front block assembly (97) comprises a fifth sliding block (975) which can slide up and down in the rotating seat (2) and can be clamped with or separated from the right front groove (93), a sixth sliding block (976) which can slide up and down in the rotating seat (2) is arranged in the rotating seat, a fifth spring (97 a) which can push the sixth sliding block (976) to move downwards with the fifth sliding block (975) when the sixth sliding block (976) is aligned with the right side groove (13) is arranged between the sixth sliding block (976) and the rotating seat (2), and a sixth spring (97 b) which can push the fifth sliding block (975) to slide upwards and be clamped with the right front groove (93) when the lower end of the sixth sliding block (976) is separated from the right side groove (13) is arranged between the rotating seat (2) and the fifth sliding block; the right rear block assembly (98) comprises a seventh sliding block (987) which can slide up and down in the rotary seat (2) and can be clamped with or separated from the right rear groove (94), an eighth sliding block (988) which can slide up and down in the rotary seat is arranged in the rotary seat (2), a seventh spring (98 a) which can push the eighth sliding block (988) to move downwards along with the seventh sliding block (987) when the eighth sliding block (988) is aligned with the left groove (12) is arranged between the eighth sliding block (988) and the rotary seat (2), and an eighth spring (98 b) which can push the seventh sliding block (987) to slide upwards and be clamped with the right rear groove (94) when the lower end of the eighth sliding block (988) is separated from the left groove (12) is arranged between the rotary seat (2) and the seventh sliding block (987).

6. The stroller of claim 1, wherein: the third locking mechanism (7) comprises a locking hole (71) arranged on the base (11), a locking block (72) which can slide up and down in the locking hole (71) and is separated from or locked with the locking hole (71) is arranged in the rotating seat (2), the transmission part (8) comprises a driving block (81) which can slide up and down in the rotating seat (2), the transmission part (8) also comprises a fixed block (82) fixed in the rotating seat (2), the fixed block (82) is provided with a transverse strip-shaped hole (83), the locking block (72) is provided with a first inclined hole (84), the driving block (81) is provided with a second inclined hole (85), the first inclined hole (84), the second inclined hole (85) and the driving block (83) are internally provided with a driving shaft (86) in a penetrating mode, when the driving block (81) slides down relative to the rotating seat (2) to enable the wall of the second inclined hole (85) to be driven by the driving shaft (86), the driving shaft (86) is further provided with a pushing block (84) to be separated from the locking hole wall (81) and the locking block (81) can be pushed upwards by the driving block (81) to be locked with the locking hole (72), the upper end of the driving block (81) is provided with a driving inclined surface (88), the lower end of the push rod assembly (3) is provided with a protruding part (89) protruding outwards and capable of pushing the driving inclined surface (88) to enable the driving block (81) to slide downwards when the push rod assembly (3) rotates to a vertical state.

7. The stroller of claim 1, wherein: the first locking mechanism (5) including establishing right connecting seat (34) at push rod assembly (3) lower extreme, rotary seat (2) on be equipped with right connecting seat (34) complex right side pedestal (22), right connecting seat (34) and right side pedestal (22) on all be equipped with a plurality of block grooves (51) along the circumferencial direction, right connecting seat (34) and right side pedestal (22) enclose and be equipped with in the space that can be in its internal lateral shifting and can simultaneously with right connecting seat (34) and right side pedestal (22) on block groove (51) block spline (52), push rod assembly (3) lower extreme still be equipped with can lateral shifting and promote spline (52) and right side pedestal (22) on block groove (51) break away from promotion seat (53), push rod assembly (3) in be equipped with can pulling promotion seat (53) lateral shifting's stay cord (54), push rod assembly (3) outside be equipped with can relative its slip and be equipped with between the slip cap (52) and spline (56) of slip cap (52).

8. The stroller of claim 1, wherein: the bottom support frame (1) comprises a front frame (14), a base (11) is arranged at the upper end of the front frame (14), a rear frame (15) is rotatably connected to the base (11), a fourth locking mechanism is arranged between the front frame (14) and the rear frame (15), the fourth locking mechanism comprises a locking groove (161) arranged on the rear frame (15), a sliding pin (162) capable of transversely moving and being clamped with or separated from the locking groove (161) is arranged in the base (11), a sliding block (163) capable of sliding relative to the sliding pin is further arranged in the base (11), an inclined surface (164) abutted against the sliding pin (162) is arranged on the sliding block (163), a lifting handle (17) capable of rotating relative to the sliding pin (162) is arranged on the rear frame (15), a pushing part (165) capable of sliding the sliding block (163) when the lifting handle (17) rotates relative to the rear frame (15), a pushing part (165) capable of pushing the sliding pin (166) is further arranged in the locking groove (161) capable of pushing the sliding pin (166) and pushing the sliding against the inclined surface (162) when the child pushes the sliding pin (166) to be separated from the pushing groove (162), a fourteenth spring (167) for pushing the sliding block (163) to reset is arranged between the base (11) and the sliding block (163).

9. The stroller of claim 2, wherein: the seat board (41) on be connected with back (43), back (43) and seat board (41) between be equipped with the block structure, the block structure include along the circumferencial direction establish first block recess (461) on seat board (41), back (43) on be equipped with second block recess (462) along the circumferencial direction, seat board (41) and back (43) enclose and be equipped with in the space that becomes can be in it lateral shifting and can simultaneously with first block recess (461) and second block recess (462) block's block piece (463), back (43) and block piece (463) between still be equipped with fifteenth spring (464) that can promote block piece (463) and reset, block piece (463) and seat board (41) between be equipped with and can promote the rotating block (466) that block piece (463) and first block recess (461) break away from when rotating, back (43) on be equipped with operation switch, operation switch (465) and rotating block (465) can be pulled between.

10. The stroller of claim 1, wherein: the front side and the rear side of the base (11) are respectively provided with a notch (18), the front side and the rear side of the rotating seat (2) are provided with clamping blocks (19) which can be clamped with the corresponding notches (18) when the rotating seat rotates to a set position, and sixteenth springs (10) which can push the clamping blocks (19) to reset are further arranged between the clamping blocks (19) and the rotating seat (2).