CN213008535U

CN213008535U - Baby stroller

Info

Publication number: CN213008535U
Application number: CN202021252967.6U
Authority: CN
Inventors: 赵龙; 萧振泉; 梁玲; 李宗帅
Original assignee: Fujian Bestway Baby Products Co ltd
Current assignee: Fujian Bestway Baby Products Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-04-20
Anticipated expiration: 2030-07-01

Abstract

The utility model relates to a baby stroller, which comprises a stroller body, wherein the front end of the stroller body is provided with a foldable handlebar, the handlebar comprises a support frame and a rotating wheel which is rotatably hinged on the upper part of the support frame, the rotating wheel is provided with a groove for inserting a lower end rod body of the handlebar, the lower end rod body of the handlebar is connected with a limiting pin, and the limiting pin is limited in a limiting groove on the upper part of the support frame; shallow body middle part is including the main car pipe support that extends around one, and before main car pipe support both ends are connected respectively, back stay, it has first pivot, second pivot to rotate respectively in preceding stay and the back stay, first pivot is connected with the preceding driving fork that is used for driving the plantago wheel to turn to, the second pivot is connected with the push rod that is used for promoting the removal of car body, be equipped with the connecting strip of connection respectively in first pivot and the second pivot in the main car pipe support to rotate the back by the synchronous rotation of connecting strip drive first pivot in the second pivot, this baby stroller simple structure is convenient for improve baby's travelling comfort.

Description

Baby stroller

Technical Field

The utility model relates to a baby stroller.

Background

The baby stroller is used as a vehicle for stepping and riding by a baby, and meanwhile, in order to enable adults to push the vehicle to move, a push handle is arranged at the rear part of the vehicle, but the push handle can only push the vehicle to move forwards and cannot realize steering of the vehicle;

in the conventional stroller, in order to constantly grasp the movement of the baby, the seat of the stroller is generally designed to be rotatable, so that the front and rear directions of the seat can be adjusted according to the needs of the baby. However, when the seat on the stroller is adjusted to face backwards, the backrest interferes with the handle of the stroller, so that the backrest cannot be adjusted to the maximum lying angle or the adjustment angle of the backrest is limited, which affects the lying comfort of the baby.

SUMMERY OF THE UTILITY MODEL

In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a baby stroller, which is not only reasonable in structure, but also safe and comfortable.

In order to solve the technical problem, the technical scheme of the utility model is that: a baby stroller comprises a stroller body, wherein a foldable handlebar is mounted at the front end of the stroller body, the handlebar comprises a support frame and a rotating wheel rotatably hinged to the upper part of the support frame, a groove inserted into a lower-end rod body of the handlebar is formed in the rotating wheel, a limiting pin is connected to the lower-end rod body of the handlebar, and the limiting pin is limited in a limiting groove in the upper part of the support frame; shallow body middle part is including the main frame pipe support that extends around one, and before main frame pipe support both ends are connected respectively, back stay, it has first pivot, second pivot to rotate respectively in preceding stay and the back stay, first pivot is connected with the preceding drive fork that is used for driving the front wheel and turns to, the second pivot is connected with the push rod that is used for promoting the automobile body to remove, be equipped with the connecting strip of connection respectively in first pivot and the second pivot in the main frame pipe support to rotate the back at the second pivot and drive the synchronous rotation of first pivot by the connecting strip.

Furthermore, the support frame comprises a U-shaped support sheet and an inserting rod connected to the lower part of the support sheet, hinge holes for hinging the rotating pins are formed in two side wall sheets of the U-shaped support sheet, and the limiting grooves are located at the upper end part and the side part of the two side wall sheets; a through hole for inserting the rotating pin is formed in the rod body at the lower end of the handlebar; the through hole extends to the lower end face of the handlebar lower end rod body.

Furthermore, a pull rod sleeve is fixedly sleeved on the periphery of the rod body at the lower end of the handlebar, and an outer flange is arranged at the upper part of the pull rod sleeve above the rotating wheel so as to be beneficial to being held by hands; the rotating wheel is cylindrical, the axis of the cylindrical rotating wheel is the axis of the rotating pin and the hinge hole, the groove is a cylindrical groove and is perpendicular to the axis of the rotating wheel, and avoidance grooves for avoiding the limiting pin are arranged on two sides of the opening of the groove.

Furthermore, the pull rod sleeve is arranged at the position of the limiting pin, and a through hole for penetrating the limiting pin is formed in the pull rod sleeve.

Furthermore, the periphery of the support frame is covered with two symmetrically arranged outer cover shells, and an avoiding notch groove for avoiding the swing of the rod body at the lower end of the handlebar is formed in an integrated structure formed by the two outer cover shells; the lower parts of the two outer housings are provided with pore channels for penetrating bolts, and the inserted rod is provided with a through hole for penetrating the bolts; the lower end of the inserted bar is inserted into the front support pipe and fixedly connected with the first rotating shaft; the lower end rod body of the handlebar is a metal pipe, the support frame is a metal piece, and the rotating wheel and the outer housing are plastic housing pieces.

Furthermore, the connecting strip is a synchronous belt wound between the first rotating shaft and the second rotating shaft.

Furthermore, the connecting strip is a steel wire wound between the first rotating shaft and the second rotating shaft, and the steel wire rubs with the outer surfaces of the first rotating shaft and the second rotating shaft to realize synchronous action; the first rotating shaft and the second rotating shaft are respectively fixedly connected with a rotating sheet, through holes for fixing the end parts of the steel wire are respectively arranged on two side parts of the rotating sheet, and the two through holes of the rotating sheet on the first rotating shaft and the two through holes of the rotating sheet on the second rotating shaft are respectively correspondingly connected with the steel wire; the front supporting pipe is fixed at the front end of the main frame pipe support, the upper part and the lower part of the front supporting pipe are provided with glands for hinging and positioning the first rotating shaft, the rear supporting pipe is fixed at the rear end of the main frame pipe support, and the upper part and the lower part of the rear supporting pipe are provided with glands for hinging and positioning the second rotating shaft.

Furthermore, the upper part of the second rotating shaft extends out of the rear supporting pipe, and the lower end of the push rod is sleeved on the second rotating shaft extending out of the rear supporting pipe; a spring pin is arranged in a second rotating shaft tube extending out of the rear supporting tube and comprises a V-shaped spring piece and a pin head arranged on the side part of the opening end of the spring pin, a pin hole for the pin head to penetrate out is formed in the second rotating shaft tube, and a limiting pin hole is formed in the lower end part of the push rod and corresponds to the pin hole; the lower end part of the push rod is fixedly sleeved with a quick-release device, the quick-release device comprises a tube body fixedly sleeved at the lower part of the push rod and a rotating handle hinged on the tube body, a groove is formed in the position where the rotating handle is installed at the lower end part of the push rod and on the tube body, a movable pressing block is arranged in the groove, the rotating handle is pressed on the outer surface of the pressing block, the inner surface of the pressing block penetrates through the groove and is pressed on the outer surface of the second rotating shaft tube body, and the inner surface of the pressing block is an inclined surface; the push rod is provided with a bending part to increase the space of the seat.

Furthermore, a rotatable seat is installed in the middle of the cart body, the lower end of the seat is fixedly connected with a rotating device through a U-shaped frame, the rotating device comprises an upper rotating platform and a lower positioning support, the upper rotating platform is vertically connected with the lower positioning support in a penetrating manner through a rotating shaft, the upper rotating platform is fixedly integrated with the U-shaped frame, the lower positioning support is fixedly arranged at the upper end of the main cart pipe frame, a positioning column vertically extends downwards from the lower positioning support near the rear end of the main cart pipe frame, a stepped hole is formed in the upper portion and the lower portion of the positioning column in a penetrating manner, a limiting column penetrates through the stepped hole, the upper end of the limiting column penetrates through the upper rotating platform, the lower end of the limiting column extends out of the positioning column and is fixedly connected with a horizontal front-back extending pressure rod, the limiting column is in a stepped shaft shape with a large upper portion and a small portion, a; the upper rotating platform is provided with a limiting hole for the limiting column to penetrate through for limiting, and the limiting hole is symmetrically formed at the front end and the back end of the upper rotating platform along the rotating shaft; and the upper rotating platform and the lower positioning bracket at the center of the rotating device are protruded upwards and recessed downwards to form a space for mounting a bearing.

Furthermore, a sunshade bracket is arranged on the seat, a retractable sunshade is arranged on the sunshade bracket, and a lying cushion with an adjustable angle is arranged on the seat through a pull rope and an adjusting buckle; the lower end of the middle part of the main frame is fixedly provided with a turnover foot rest, and the turnover principle and structure of the foot rest are the same as the turnover structure of the handlebar; the rear end of the rear supporting tube is fixedly provided with a rear driving fork frame, the rear end of the rear driving frame is bilaterally symmetrically provided with two rear wheels, and the shaft hole of each front wheel is internally provided with a pedal plate for driving the front wheel to rotate.

Compared with the prior art, the utility model discloses following beneficial effect has: the synchronous linkage mechanism of the steering push handle and the handlebar is arranged in the main body of the baby carriage and is not arranged on the left side and the right side of the main frame pipe frame any more, so that the placement of the feet of the baby is influenced, and the safety and the comfort of the baby are improved; the safe folding handlebar has reasonable design structure and convenient operation, and the hand clamping condition can not occur; the design of rotatable seat has guaranteed that can directly perceivedly see baby's state when the shallow increases security and interactive, its simple structure, the simple operation.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a perspective view of the embodiment of the present invention with the sunshade removed;

FIG. 3 is a perspective view of an embodiment of the present invention;

FIGS. 4 and 5 are exploded views of FIG. 3;

FIGS. 6 and 7 are partial views of FIG. 5;

FIG. 8 is a cross-sectional view of FIG. 3;

fig. 9 is a perspective view of the embodiment of the present invention with the sunshade and the rotating device removed;

FIG. 10 is a schematic view of the connection between the main frame and the front and rear support tubes in the embodiment of the present invention;

FIG. 11 is an exploded view of FIG. 10;

FIG. 12 is a cross-sectional view of FIG. 10;

FIGS. 13 and 14 are sectional views of the front and rear support tubes;

FIG. 15 is a cross-sectional view of the connection portion of the second shaft and the push rod;

fig. 16 is a cross-sectional view of a rotating device according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1 to 16, a baby stroller comprises a stroller body a, a foldable handlebar B is mounted at the front end of the stroller body, the handlebar comprises a support frame 1 and a rotating wheel 2 rotatably hinged to the upper part of the support frame, the rotating wheel is provided with a groove 4 inserted into a lower rod body 3 of the handlebar, the lower rod body of the handlebar is connected with a limit pin 5, and the limit pin is limited in a limit groove 101 at the upper part of the support frame; the middle part of the cart body comprises a main cart pipe frame 11 extending forwards and backwards, two ends of the main cart pipe frame are respectively connected with a front supporting pipe and a rear supporting pipe, a first rotating shaft 14 and a second rotating shaft 15 are respectively hinged in the front supporting pipe 12 and the rear supporting pipe body 13 in a rotating way, the first shaft is connected to a front driving fork 16 for driving the front wheel 53 to turn (a rod body at the upper portion of the driving fork is inserted into the first shaft body and fixedly connected thereto), the second rotating shaft is connected with a push rod 17 for pushing the vehicle body to move, a connecting strip 18 which is respectively connected with the first rotating shaft and the second rotating shaft is arranged in the main vehicle pipe frame so that the first rotating shaft is driven by the connecting strip to synchronously rotate after the second rotating shaft rotates, when an adult holds the push rod to swing, the connecting strip drives the first rotating shaft and the front driving fork frame fixedly connected with the first rotating shaft to synchronously rotate, and the steering of the vehicle body is controlled.

In the embodiment of the present invention, the supporting frame comprises a U-shaped supporting sheet 102 and an inserting rod 103 connected to the lower part of the supporting sheet, hinge holes 105 for hinge-connecting the rotation pins 6 are formed on two side wall sheets 104 of the U-shaped supporting sheet, the limiting grooves are located at the upper end and the side parts of the two side wall sheets, the upper parts of the side wall sheets are semicircular arcs, and the distance between the limiting grooves of the upper end and the side parts and the center of the hinge holes is equal; a through hole 301 for inserting a rotating pin is arranged on the lower end rod body 3 of the handlebar; the through hole extends to the lower terminal surface of the handlebar lower end rod body, a channel is formed when the through hole extends to the lower terminal surface of the handlebar lower end rod body, and the handlebar lower end rod body can slide up and down relative to the rotating pin.

In the embodiment of the present invention, in order to facilitate the grasping operation of the operator, the pull rod sleeve 7 is fixedly sleeved on the periphery of the lower end rod body of the handlebar, the outer flange 701 is arranged above the rotating wheel on the upper portion of the pull rod sleeve, so as to facilitate the grasping operation by the hand, when in use, the fingers of the operator are buckled between the lower end surface of the outer flange 701 and the rotating wheel 2 and lifted upwards, so that the handlebar and the lower end rod body can be lifted upwards, the limit pin 5 is separated from the limit groove 101, the inner hole of the pull rod sleeve can be directly in interference fit with the lower end rod body 3, and the fixed connection between the two is realized; the rotating wheel is cylindrical, the axis of the cylindrical rotating wheel is the axis of the rotating pin and the hinge hole, the groove is a cylindrical groove and is perpendicular to the axis of the rotating wheel, and avoidance grooves for avoiding the limiting pin are arranged on two sides of the opening of the groove.

In the embodiment of the present invention, the pull rod sleeve is disposed on the position of the limit pin, and the pull rod sleeve has a through hole 702 for passing through the limit pin.

In the embodiment of the present invention, the periphery of the supporting frame is covered with two symmetrically arranged outer covers 8, the two outer covers are locked and fixed by the bolt head 601 and the nut 602 at the two ends of the rotating pin 6, and an avoiding notch 603 for avoiding the swing of the rod body at the lower end of the handlebar is arranged on the integrated structure formed by the two outer covers; the lower parts of the two outer housings are provided with a hole channel 801 for passing a bolt, and the inserted rod is provided with a through hole 106 for passing the bolt 10; for reasonable design, the rotating wheel is cylindrical, the axis of the cylindrical rotating wheel is the axis of the rotating pin and the hinge hole, the groove 4 is a cylindrical groove and is perpendicular to the axis of the rotating wheel, and avoidance grooves 401 for avoiding the limit pin are arranged on two sides of the opening of the groove; the lower end of the inserted bar is inserted into the front support pipe and fixedly connected with the first rotating shaft; the lower end rod body of the handlebar is a metal pipe, the support frame is a metal piece, and the rotating wheel and the outer housing are plastic housing pieces.

In the present application, the structure of the connecting strip 8 connecting the first rotating shaft 4 and the second rotating shaft 5 may be various, such as a synchronous belt, a steel wire or a chain, when the connecting strip 8 is a synchronous belt or a chain, the first rotating shaft 4 and the second rotating shaft 5 have a belt pulley or a chain wheel engaged with the synchronous belt or the chain and acting synchronously; when the connecting strip 8 is a steel wire, the steel wire and the outer surfaces of the first rotating shaft and the second rotating shaft have larger friction force, so that synchronous action is realized; the first rotating shaft and the second rotating shaft are respectively fixedly connected with a rotating sheet 19, two side parts of the rotating sheet are respectively provided with a through hole 20 for fixing the end part of a steel wire, two through holes of the rotating sheet on the first rotating shaft and two through holes of the rotating sheet on the second rotating shaft are respectively correspondingly connected with the steel wire, the rotating sheet is in a ring shape, the through holes can be directly arranged on the ring shape, or two lugs 21 are arranged on the ring shape, and the through holes are arranged on the lugs 21; preceding supporting tube is fixed at main car pipe support front end, and its upper portion and lower part are equipped with the gland 22 that is used for the first pivot of articulated location, back supporting tube is fixed at main car pipe support rear end, and its upper portion and lower part are equipped with the gland that is used for articulated location second pivot, and the gland plays the effect of supporting and rotatory articulated first pivot or second pivot, and the gland can be the plastics injection molding, and upper and lower two glands can be fixed through bolt locking.

In the embodiment of the utility model, in order to facilitate the connection between the second rotating shaft and the push rod, the upper part of the second rotating shaft extends out of the rear supporting tube, and the lower end of the push rod is sleeved on the second rotating shaft extending out of the rear supporting tube; in order to realize the positioning of the push rod and the second rotating shaft, a spring pin 23 is arranged in the pipe body of the second rotating shaft extending out of the rear supporting pipe, the spring pin comprises a V-shaped spring piece 24 and a pin head 25 arranged at the side part of the opening end of the spring pin, a pin hole 26 for the pin head to penetrate out is arranged on the pipe body of the second rotating shaft, a limit pin hole 27 is correspondingly arranged at the lower end part of the push rod and the pin hole, when the push rod (push handle) is sleeved in the second rotating shaft, the pin head can be clamped into the limit pin hole, so that the push rod can be well positioned at the upper part of; the lower end part of the push rod is fixedly sleeved with a quick release 28 which comprises a tube body fixedly sleeved at the lower part of the push rod and a rotating handle 30 hinged on the tube body 29, the lower end part of the push rod and the position of the rotating handle arranged on the tube body are provided with a slot 31, a movable pressing block 32 is arranged in the slot, the rotating handle is pressed against the outer surface of the pressing block, the inner surface of the pressing block passes through the slot and is pressed against the outer surface of the tube body of the second rotating shaft, the inner surface of the pressing block is an inclined surface 33 so as to be favorable for the push rod to be sleeved in the second rotating shaft, the tube body of the quick release and the lower part of the push rod are fixedly connected, when the inner surface of the pressing block is an inclined surface, the pressing block can be pushed towards the outer side through the inclined surface (without being manually pushed outwards like a straight rectangular block, so that, meanwhile, the inner surface of the pressing block is pressed on the outer surface of the second rotating shaft pipe body; in order to increase the seat space, the push rod has a bent portion 34 which is bent away from the handle to further increase the space for unfolding the reclining mat.

In the embodiment of the present invention, a rotatable seat 35 is installed in the middle of the cart body, the lower end of the seat is fixedly connected with a rotating device 37 through a U-shaped frame 36, the rotating device comprises an upper rotating platform 38 and a lower positioning bracket 39, the upper rotating platform and the lower positioning bracket are vertically connected through a rotating shaft 40, the upper rotating platform and the U-shaped frame are fixedly integrated, the lower positioning bracket is fixedly arranged at the upper end of the main cart tube frame, a positioning post 41 vertically extends downwards near the rear end of the lower positioning bracket, a stepped hole 42 vertically penetrates through the positioning post, a limiting post 43 is arranged in the stepped hole, the stepped hole is used for preventing the limiting post from sliding downwards and falling off from the positioning post, the upper end of the limiting post penetrates out of the upper rotating platform, the lower end extends out of the positioning post and is fixedly connected with a horizontal front-back extending pressing rod 44, the limiting post is in a stepped shaft shape, the upper end of the spring is abutted to the step position of the limiting column, and the lower end of the spring is abutted to the step position of the stepped hole; the upper rotating platform is provided with a limiting hole 46 for the limiting column to penetrate through for limiting, and the limiting hole is symmetrically formed at the front end and the back end of the upper rotating platform near the front end along the rotating shaft; the upper rotating platform at the center of the rotating device is convex, and the lower positioning bracket is concave to form a space for mounting the bearing 47; when needs upset seat, only need press the depression bar down, the depression bar drives spacing post and moves down and deviate from spacing hole entering fixed column in, and the spring compression, alright rotatory rotating platform and seat in the while, the spacing hole of 180 back anterior segments and the spacing hole transposition position of back end, and then loosen the depression bar this moment, the spring resets, lifts on the gag lever post and gets into spacing downthehole, spacing again, the completion is rotated.

In the embodiment of the utility model, the seat is provided with a sunshade bracket 48, the sunshade bracket is provided with a retractable sunshade 49, the sunshade can be folded and the push rod is removed, so that the trolley trunk can be more easily arranged, the transportation is convenient and the space is saved, and the seat is provided with a lying pad 50 with the angle adjustable through the pull rope and the adjusting buckle; the lower end of the middle part of the main frame is fixedly provided with a turnover foot rest 51, and the turnover principle and structure of the foot rest are the same as the turnover structure of the handlebar; the rear end of the rear supporting tube is fixedly provided with a rear driving fork frame 52, the rear end of the rear driving frame is bilaterally symmetrically provided with two rear wheels 54, and a pedal 55 for driving the front wheels to rotate is arranged in a shaft hole of the front wheels.

In an embodiment of the present invention, a method for mounting a handlebar includes: the rotating wheel is sleeved between the two side wall sheets of the U-shaped supporting sheet, the rod body at the lower end of the handlebar is inserted into the groove, the axis of the rotating wheel is overlapped with the axis of the hinge holes of the two side wall sheets and the axis of the through hole, the rotating pin penetrates through the center hole, the hinge holes and the through hole of the rotating wheel, and the end of the rotating pin is locked with a nut; the inserting rod is inserted into the front supporting pipe and fixedly connected with the first rotating shaft, the two outer cover shells are arranged outside the supporting frame and pass through the pore passage and the through hole through the bolt and are locked by the nut, and the using method of the handlebar comprises the following steps: the handlebar and the rod body at the lower end of the handlebar are lifted upwards to be cut off, the limiting pin is separated from the limit of the limiting groove, and the rod body in the groove drives the rotating wheel to swing, so that the handlebar rotates, the operation is convenient and fast, and the condition of clamping hands is avoided because the structure does not have structures such as buckles or buckle grooves; since most of parts are locked and connected through nuts, the actual cart can be disassembled into the parts so as to realize small-volume transportation, and a customer can independently assemble the cart in a DIY manner when receiving the cart, so that interactivity is improved; and along with the growth of child's age, can get rid of sunshade support and sunshade, cooperate the running-board like this and can become the tricycle of riding, the function is diversified.

The embodiment of the utility model provides an in, turn to push away the theory of operation of the synchronous link gear of handle and handlebar, owing to be equipped with the connecting strip of connection respectively in first pivot and second pivot in main frame pipe, thereby rotate the first pivot of back by the connecting strip drive after the second pivot of being connected with the push rod is synchronous, realize turning to of the rotation control handlebar of push rod (push away the handle), the connecting strip isotructure setting of this structure is intraductal at main frame, thereby can not account for the outer space of automobile body, do not influence trampling of children and take exercise, make the automobile body structure simplify greatly simultaneously, the production preparation has been made things convenient for.

The present invention is not limited to the above preferred embodiments, and any one can derive various other stroller configurations. All the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims

1. A stroller, characterized in that: the foldable handlebar is mounted at the front end of the trolley body, the handlebar comprises a support frame and a rotating wheel rotatably hinged to the upper portion of the support frame, a groove inserted into a lower end rod body of the handlebar is formed in the rotating wheel, a limiting pin is connected to the lower end rod body of the handlebar, and the limiting pin is limited in a limiting groove in the upper portion of the support frame; shallow body middle part is including the main frame pipe support that extends around one, and before main frame pipe support both ends are connected respectively, back stay, it has first pivot, second pivot to rotate respectively in preceding stay and the back stay, first pivot is connected with the preceding drive fork that is used for driving the front wheel and turns to, the second pivot is connected with the push rod that is used for promoting the automobile body to remove, be equipped with the connecting strip of connection respectively in first pivot and the second pivot in the main frame pipe support to rotate the back at the second pivot and drive the synchronous rotation of first pivot by the connecting strip.

2. A stroller in accordance with claim 1, in which: the support frame comprises a U-shaped support sheet and an inserting rod connected to the lower part of the support sheet, hinge holes for hinging the rotating pins are formed in two side wall sheets of the U-shaped support sheet, and the limiting grooves are located at the upper end part and the side part of the two side wall sheets; a through hole for inserting the rotating pin is formed in the rod body at the lower end of the handlebar; the through hole extends to the lower end face of the handlebar lower end rod body.

3. A stroller according to claim 1 or 2, wherein: a pull rod sleeve is fixedly sleeved on the periphery of the rod body at the lower end of the handlebar, and an outer flange is arranged at the upper part of the pull rod sleeve above the rotating wheel so as to be beneficial to being held by hands; the rotating wheel is cylindrical, the axis of the cylindrical rotating wheel is the axis of the rotating pin and the hinge hole, the groove is a cylindrical groove and is perpendicular to the axis of the rotating wheel, and avoidance grooves for avoiding the limiting pin are arranged on two sides of the opening of the groove.

4. A stroller in accordance with claim 3, in which: the pull rod sleeve is arranged at the position of the limiting pin, and a through hole for penetrating the limiting pin is formed in the pull rod sleeve.

5. A stroller in accordance with claim 2, in which: the periphery of the support frame is covered with two symmetrically arranged outer housings, and an avoiding notch groove for avoiding the swing of a rod body at the lower end of the handlebar is formed in an integrated structure formed by the two outer housings; the lower parts of the two outer housings are provided with pore channels for penetrating bolts, and the inserted rod is provided with a through hole for penetrating the bolts; the lower end of the inserted bar is inserted into the front support pipe and fixedly connected with the first rotating shaft; the lower end rod body of the handlebar is a metal pipe, the support frame is a metal piece, and the rotating wheel and the outer housing are plastic housing pieces.

6. A stroller in accordance with claim 1, in which: the connecting strip is a synchronous belt wound between the first rotating shaft and the second rotating shaft.

7. A stroller in accordance with claim 1, in which: the connecting strip is a steel wire wound between the first rotating shaft and the second rotating shaft, and the steel wire rubs with the outer surfaces of the first rotating shaft and the second rotating shaft to realize synchronous action; the first rotating shaft and the second rotating shaft are respectively fixedly connected with a rotating sheet, through holes for fixing the end parts of the steel wire are respectively arranged on two side parts of the rotating sheet, and the two through holes of the rotating sheet on the first rotating shaft and the two through holes of the rotating sheet on the second rotating shaft are respectively correspondingly connected with the steel wire; the front supporting pipe is fixed at the front end of the main frame pipe support, the upper part and the lower part of the front supporting pipe are provided with glands for hinging and positioning the first rotating shaft, the rear supporting pipe is fixed at the rear end of the main frame pipe support, and the upper part and the lower part of the rear supporting pipe are provided with glands for hinging and positioning the second rotating shaft.

8. A stroller in accordance with claim 1, in which: the upper part of the second rotating shaft extends out of the rear supporting pipe, and the lower end of the push rod is sleeved on the second rotating shaft extending out of the rear supporting pipe; a spring pin is arranged in a second rotating shaft tube extending out of the rear supporting tube and comprises a V-shaped spring piece and a pin head arranged on the side part of the opening end of the spring pin, a pin hole for the pin head to penetrate out is formed in the second rotating shaft tube, and a limiting pin hole is formed in the lower end part of the push rod and corresponds to the pin hole; the lower end part of the push rod is fixedly sleeved with a quick-release device, the quick-release device comprises a tube body fixedly sleeved at the lower part of the push rod and a rotating handle hinged on the tube body, a groove is formed in the position where the rotating handle is installed at the lower end part of the push rod and on the tube body, a movable pressing block is arranged in the groove, the rotating handle is pressed on the outer surface of the pressing block, the inner surface of the pressing block penetrates through the groove and is pressed on the outer surface of the second rotating shaft tube body, and the inner surface of the pressing block is an inclined surface; the push rod is provided with a bending part to increase the space of the seat.

9. A stroller in accordance with claim 1, in which: the cart comprises a cart body, wherein a rotatable seat is arranged in the middle of the cart body, the lower end of the seat is fixedly connected with a rotating device through a U-shaped frame, the rotating device comprises an upper rotating platform and a lower positioning support, the upper rotating platform is vertically connected with the lower positioning support in a penetrating manner through a rotating shaft, the upper rotating platform is fixedly integrated with the U-shaped frame, the lower positioning support is fixedly arranged at the upper end of the main cart tube frame, a positioning column vertically extends downwards at the position close to the rear end of the lower positioning support, a stepped hole is formed in the upper part and the lower part of the positioning column in a penetrating manner, a limiting column penetrates through the upper rotating platform at the upper end of the limiting column, the lower end of the limiting column extends out of the positioning column and is fixedly connected with a horizontal front-back extending pressure rod, the limiting column is in a stepped shaft shape with a large upper end and a small; the upper rotating platform is provided with a limiting hole for the limiting column to penetrate through for limiting, and the limiting hole is symmetrically formed at the front end and the back end of the upper rotating platform along the rotating shaft; and the upper rotating platform and the lower positioning bracket at the center of the rotating device are protruded upwards and recessed downwards to form a space for mounting a bearing.

10. A stroller in accordance with claim 9, in which: the seat is provided with a sunshade bracket, the sunshade bracket is provided with a retractable sunshade, and the seat is provided with a lying cushion with an adjustable angle through a pull rope and an adjusting buckle; the lower end of the middle part of the main frame is fixedly provided with a turnover foot rest, and the turnover principle and structure of the foot rest are the same as the turnover structure of the handlebar; the rear end of the rear supporting tube is fixedly provided with a rear driving fork frame, the rear end of the rear driving frame is bilaterally symmetrically provided with two rear wheels, and a pedal plate for driving the front wheels to rotate is arranged in a shaft hole of the front wheels.