CN216002743U - Children's barrow - Google Patents

Abstract

The utility model discloses a children's cart, which comprises a frame, wherein the frame comprises a handle, a front foot, a rear foot, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a sliding seat, wherein the sliding seat can be connected with the front foot in a relatively up-and-down moving manner; the lower side of the driver is pivoted with the upper side of the front foot, and the front side of the rear foot is pivoted with the driver or/and the front foot; one side of the first connecting piece is pivoted with the driver, one side of the second connecting piece is pivoted with the first connecting piece, the other side of the second connecting piece is pivoted with the front leg, and the driver, the front leg, the first connecting piece and the second connecting piece form a four-bar linkage structure; the upper side of the third connecting piece is pivoted with the first connecting piece or/and the second connecting piece, and the lower side of the third connecting piece is pivoted with the sliding seat; the front side of the fourth connecting piece is pivoted on the sliding seat, and the rear side of the fourth connecting piece is pivoted on the rear foot. So set up for folding easy and simple to handle, folding back is small moreover, conveniently carries, deposits.

Description

Children's barrow

Technical Field

The utility model relates to the field of infant products, in particular to a baby stroller.

Background

Children's shallow generally includes the frame, reduces to take up an area of the space when perhaps not needing to use for conveniently carrying, the frame generally sets up to converting between expansion state and fold condition to when needs use, make the frame be in the expansion state, go out to carry or need not use and put in when certain department when needs, fold the frame, folding back whole volume ratio of frame is little when expanding, thereby conveniently carries and deposits relatively.

At present, the requirements on the frame of the baby stroller on the market are more, namely the folding operation is simple, and the folded size is small, but the folding operation of the frame of many baby strollers on the market is still more complicated when the frame is folded, and the folded size is still larger, so that the baby stroller is inconvenient to carry and store.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and provides the baby stroller which is simple and convenient to fold, small in size after being folded and convenient to carry and store.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a children's barrow comprises a frame capable of being converted between an unfolding state and a folding state, wherein the frame comprises a driver, front legs, rear legs, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a sliding seat which can be connected to the front legs in a relatively up-down moving mode; the lower side of the driver is pivoted with the upper side of the front foot, and the front side of the rear foot is pivoted with the driver or/and the front foot; one side of the first connecting piece is pivoted with the driver, one side of the second connecting piece is pivoted with the first connecting piece, the other side of the second connecting piece is pivoted with the front leg, and the driver, the front leg, the first connecting piece and the second connecting piece form a four-bar linkage structure; the upper side of the third connecting piece is pivoted with the first connecting piece or/and the second connecting piece, and the lower side of the third connecting piece is pivoted with the sliding seat; the front side of the fourth connecting piece is pivoted on the sliding seat, and the rear side of the fourth connecting piece is pivoted on the rear foot.

The other side of the second connecting piece is rotatably pivoted to the front foot around a third rotating shaft, the lower side of the third connecting piece is rotatably pivoted to the sliding seat around a fourth rotating shaft, and the fourth rotating shaft is positioned on the lower side of the third rotating shaft.

The rear foot is pivoted to the front foot or/and the front foot in a rotating manner around a fifth rotating shaft, the fourth connecting piece is pivoted to the rear foot in a rotating manner around a sixth rotating shaft, and the sixth rotating shaft is positioned on the lower side or/and the rear side of the fifth rotating shaft.

The stroller further comprises a seat supporting piece extending forwards and backwards, and the seat supporting piece is fixedly connected with the first connecting piece.

The pivoting position of the first connecting piece and the driver is positioned above the fixed connecting position of the first connecting piece and the seat supporting piece, namely the seat supporting piece is positioned on the lower side of the first rotating shaft; preferably, the seat support is rotated to a position substantially parallel to the front foot when the frame is in the folded condition.

The upper end of the front foot is fixedly connected with a pivoting piece, and the upper side of the pivoting piece extends into the lower side of the driver and is pivoted with the driver; preferably, the upper side of a fixed seat is fixedly connected into the lower side of the driver, a gap communicated with the interior of the driver is formed in the lower side of the fixed seat, and the upper side of the pivoting piece extends into the gap and is pivoted into the fixed seat and the driver; the gap is set, and at least part of the pivot joint extending into the gap can rotate relatively to the outside of the gap during the folding process of the frame; preferably, the rider rotates to a position substantially parallel to the front leg when the frame is in the folded condition.

The fixed seat comprises a first fixed part and a second fixed part which are relatively and fixedly connected, and the gap is formed between the first fixed seat and the second fixed seat; preferably, the first fixing part and the second fixing part are fixedly connected with a first reinforcing part and a second reinforcing part respectively at opposite sides thereof.

The child stroller is further provided with a locking mechanism for locking the frame in an unfolded state, the locking mechanism comprises a matching part arranged on the upper side of the pivoting part, a locking part which can be connected into the handle in a relatively up-and-down moving mode, and an elastic resetting part arranged between the locking part and the handle, and the lower end of the locking part is provided with a locking part; when the frame is in an unfolded state, the locking piece moves downwards under the action of the elastic resetting piece, and the locking part of the locking piece is matched with the matching part on the pivoting piece, so that a driver and the front foot cannot rotate relatively; preferably, the matching part is an abutting part arranged on the upper side of the pivot part, and when the frame is in an unfolded state, the locking part abuts against the rear side of the abutting part; or, the matching part is a groove which is arranged on the upper side of the pivoting part and is opened upwards, and when the frame is in an unfolding state, the locking part is inserted into the groove.

First connecting piece one side around a first pivot rotatory ground pivot in the car hand, second connecting piece one side around a second pivot rotatory ground pivot in first connecting piece, the second pivot is located first pivot downside, the second pivot still is located first pivot front side.

The frame comprises left and right side supports which are connected, and each side support comprises the rider, a front foot, a rear foot, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a sliding seat which can be connected with the front foot in a relatively up-and-down moving mode.

The utility model has the beneficial effects that:

the child stroller adopting the structure has the advantages of simple folding operation, small volume after folding and convenient carrying and storage.

Drawings

FIG. 1 is a schematic plan view of the stroller of the present invention in a deployed configuration;

FIG. 2 is a perspective view of the stroller of the present invention in a deployed position;

FIG. 3 is an enlarged schematic view of the portion B of FIG. 2;

FIG. 4 is an enlarged view of the portion B in FIG. 2;

FIG. 5 is an enlarged view one of the exploded views according to FIG. 4;

FIG. 6 is an enlarged view II of the exploded view according to FIG. 4;

FIG. 7 is an enlarged view III of the exploded view according to FIG. 4;

FIG. 8 is an enlarged cross-sectional view taken along line A-A of FIG. 1;

FIG. 9 is an enlarged cross-sectional view taken along the line C-C in FIG. 2;

FIG. 10 is a schematic plan view of the stroller of the present invention during folding;

FIG. 11 is a schematic perspective view of the stroller of the present invention during folding;

FIG. 12 is an enlarged view of the portion D in FIG. 11;

FIG. 13 is a schematic plan view of the stroller of the present invention shown folded;

FIG. 14 is a schematic perspective view of the folded stroller of the present invention;

fig. 15 is an enlarged schematic view according to section E of fig. 14.

Detailed Description

As shown in fig. 1 to 15, the stroller of the present invention comprises a frame convertible between an unfolded state and a folded state, the frame comprising a rider 1, a front leg 2, a rear leg 3, a first connecting member 4, a second connecting member 5, a third connecting member 6, a fourth connecting member 7, a sliding base 8 connected to the front leg in a manner of moving up and down relatively; the lower side of the rider 1 is pivoted with the upper side of the front foot 2, and the front side of the rear foot 3 is pivoted with the rider 1 or/and the front foot 2; one side of the first connecting piece 4 is pivoted with the driver 1, one side of the second connecting piece 5 is pivoted with the first connecting piece 4, the other side of the second connecting piece is pivoted with the front foot 2, and the driver 1, the front foot 2, the first connecting piece 4 and the second connecting piece 5 form a four-connecting-rod structure; the upper side of the third connecting piece 6 is pivoted with the first connecting piece 4 or/and the second connecting piece 5, and the lower side of the third connecting piece is pivoted with the sliding seat 8; the front side of the fourth connecting piece 7 is pivoted on the sliding seat 8, and the rear side is pivoted on the rear foot 3.

One side of the first connecting piece 4 is pivotally connected to the rider 1 around a first rotating shaft 41 in a rotating manner, one side of the second connecting piece 5 is pivotally connected to the first connecting piece 4 around a second rotating shaft 51 in a rotating manner, and the second rotating shaft 51 is located on the lower side of the first rotating shaft 41.

Preferably, the third link 6 side and the second link 5 side and the first link 4 are pivoted together by the second rotating shaft 51, so that the assembly is easier. In other embodiments, one side of the third connecting member 6 may be pivotally connected to only the first connecting member 4 or only the second connecting member 5.

The other side of the second connecting piece 5 is pivoted to the front leg 2 around a third rotating shaft 52 in a rotating manner, the lower side of the third connecting piece 6 is pivoted to the sliding seat 8 around a fourth rotating shaft 61 in a rotating manner, preferably, the fourth rotating shaft 61 is positioned at the lower side of the third rotating shaft 52, so that when the first connecting piece 4 rotates downwards and the second connecting piece 5 rotates downwards, the third connecting piece can be integrally pushed to move downwards, and then the sliding seat 8 is driven to move downwards relative to the front leg 2.

Preferably, the slide 8 is arranged to be movable up and down on the portion of the front leg 2 located on the lower side of the first pivot 41. The arrangement is such that the sliding base 8 does not interfere with the second connecting piece 5 during the process of moving up and down relative to the front foot 2, thereby avoiding influencing the folding and unfolding of the frame. Or the sliding sleeve 8 can move up and down in the whole process relative to the front foot, only one side is provided with an avoiding groove, and the avoiding groove can avoid the second connecting piece 5 when moving up and down.

In this embodiment, the rear leg 3 is pivotally connected to the front leg 2 or/and the front leg 2 around a fifth rotating shaft 31, the fourth connecting member 7 is pivotally connected to the rear leg 3 around a sixth rotating shaft 71, and the sixth rotating shaft 71 is located at the lower side or/and the rear side of the fifth rotating shaft 31. Thus, when the sliding base 8 moves downward relative to the front leg 2, the fourth connecting member 7 can pull the rear leg 3 to rotate forward, and the rear leg 3 rotates forward around the first rotating shaft 41.

In this embodiment, the second rotating shaft 51 is also located at the front side of the first rotating shaft 41. Therefore, when the stroller of the present invention is folded, the handle 1 can be rotated forward and downward, the first connecting member 4 can be driven to rotate downward, because the handle 1, the front leg 2, the first connecting member 4 and the second connecting member form a four-bar linkage structure, so that one side of the second connecting member 5 pivoted to the first connecting member 4 can also be driven to rotate downward (i.e. the second connecting member 5 rotates forward and downward around the third rotating shaft 52), so that the third connecting member 6 not only rotates with its upper side relative to the first connecting member 4 and the second connecting member 5, but also moves downward with the third connecting member 6, so that the sliding seat 8 is pushed to move downward relative to the front leg 2, so that the front side of the fourth connecting member 7 is driven by the sliding seat 8 to rotate forward and downward, so that the rear leg 3 is pulled forward by the rear side of the fourth connecting member 7 to rotate forward and approach the front leg 2 (see fig. 10, b), 11. 12) shown in the figure; until the components of the frame can not relatively rotate and move any more, at this time, the driver 1, the front leg 2 and the rear leg 3 are relatively close to each other, the first connecting piece 4, the second connecting piece 5, the third connecting piece 6 and the fourth connecting piece 7 are also relatively close to the driver 1, the front leg 2 and the rear leg 3 in a rotating way, namely, the components of the frame are relatively close to each other, and the frame of the baby stroller is completely folded (as shown in fig. 13, 14 and 15). That is to say, when carrying out folding operation, only need to rotate towards the front below the driver 1, each subassembly of frame all can the linkage rotary motion to folding operation is very simple, and each subassembly of folding back frame is close to relatively moreover, thereby folding back whole small, portable, deposit.

Preferably, the front foot 2, the rear foot 3, the slide 8, the fourth coupling 7 are arranged such that, when the frame is in the folded condition, the rear foot 3 is substantially parallel to the front foot 2 and the fourth coupling 7 is also substantially parallel to the front foot 2. So set up for the frame after folding is flat partially, thereby the whole volume of folding frame is littleer.

The stroller further comprises a seat supporting member 9 extending forwards and backwards, and the seat supporting member 9 is fixedly connected with the first connecting member 4, so that in the process of folding the stroller, as the first connecting member 4 is pulled to rotate downwards and backwards, the seat supporting member 9 also rotates downwards and backwards together with the first connecting member, and is folded by being relatively close to other components of the stroller frame. With this arrangement, the seat support member 9 can be folded along with the folding of the frame without a separate folding operation, thereby making the overall folding operation of the stroller of the present invention simpler.

Preferably, the pivot position of the first connecting member 4 and the rider 1 is located above the fixed connecting position of the first connecting member 4 and the seat support 9, that is, the seat support 9 is located at the lower side of the first rotating shaft 41. Because the first connecting member 4 rotates around the first rotating shaft 41 during the frame folding process, the seat supporting member 9 can be pulled to rotate by a larger angle along with the downward rotation of the front side of the first connecting member 4 during the frame folding process, so that the included angle between the seat supporting member 9 and the rear leg 3 is smaller. In this embodiment, the seat support also rotates to a state substantially parallel to the front leg 2 when the frame is in the state. Thus, the folding overall volume of the baby stroller is smaller.

In the present embodiment, the upper side of the front leg 2 extends into the lower side of the rider 1, and the rider 1 and the front leg 2 are arranged such that the rider 1 rotates to a state substantially parallel to the front leg 2 when the frame is in the folded state. So set up, also make the frame after folding further to be flat to the whole small of frame of folding.

In this embodiment, a pivot 21 is fixedly connected to the upper end of the front leg 2, and the upper side of the pivot 21 extends into the lower side of the rider 1 and is pivoted with the rider 1, so as to achieve the purpose of pivoting the upper side of the front leg 2 with the lower side of the rider 1.

The child stroller is further provided with a locking mechanism for locking the frame in the unfolded state. The locking mechanism comprises a matching part 211 arranged on the upper side of the pivoting part 21, a locking part 10 which can be relatively connected in the driver 1 in a vertically moving mode, and an elastic resetting part 11 arranged between the locking part 10 and the driver 1, wherein the locking part 101 is arranged at the lower end of the locking part 10; when the frame is in the unfolded state, under the action of the elastic reset piece 11, the locking piece 10 moves downwards, the locking part 101 of the locking piece is matched with the matching part 211 on the pivot piece 21, so that the rider 1 and the front foot 2 can not rotate relatively, and the frame is locked in the unfolded state.

When the stroller of the present invention is folded, the locking device is first unlocked, that is, the locking member 10 moves upward to be disengaged from the engaging portion 211, and at this time, the rider 1 and the front leg 2 can rotate relatively, so that the stroller frame can be folded.

In this embodiment, the engaging portion 211 is an abutting portion disposed on the upper side of the pivot member 21, and when the frame is in the unfolded state, the locking portion 101 abuts against the rear side of the abutting portion, so that the rider 1 cannot rotate forward relative to the front leg 2, and the frame cannot be folded. Moving the locking member 10 upward can disengage the locking portion 101 from abutting with the abutting portion, so that the rider 1 and the front leg 2 can rotate relatively.

In another embodiment, the engaging portion 211 may be a recess that is provided on the upper side of the pivot member 21 and opens upward, and when the frame is in the unfolded state, the locking portion 101 is inserted into the recess, so that the rider 1 cannot rotate forward relative to the front leg 2 and cannot fold the frame. The locking part 101 can be disengaged from the groove by moving the locking piece 10 upwards, and the rider 1 and the front leg 2 can rotate relatively.

The locking device and the unlocking method can also be any other known and feasible structures, and are not described in detail herein since they are not the utility model points of the present invention.

In this embodiment, the upper side of a fixing seat 12 is fixedly connected to the lower side of the rider 1, a gap 121 communicated with the interior of the rider 1 is formed in the lower side of the fixing seat 12, and the upper side of the pivot member 21 extends into the fixing seat 12 and the rider 1 from the gap 121 and is pivoted in the fixing seat and the rider 1; and the gap 121 is configured such that, during the folding process of the frame, the part of the pivot member 21 extending into the gap 121 can rotate relatively to the outside of the gap 121. Namely, in the folding process of the frame, the fixing seat 12 and the pivot part 21 can rotate relatively, so that the folding of the frame is not affected, and the fixing seat 12 is not required to be arranged too large, thereby reducing the whole volume of the folded frame.

The fixing base 12 includes a first fixing member 122 and a second fixing member 123 that are relatively fixedly connected, and the gap 121 is formed between the first fixing base 12 and the second fixing base 12. Preferably, the first reinforcement 124 and the second reinforcement 125 are fixedly connected to opposite sides of the first fixing member 122 and the second fixing member 123, respectively, so as to improve the connection strength with the pivot member 21, that is, the connection strength between the rider 1 and the front leg 2, that is, the strength of the frame in the unfolded state, and further improve the safety of the frame in use. After the first fixing member 122 and the second fixing member 123 are fixedly connected to the first reinforcing member 124 and the second reinforcing member 125 at opposite sides, respectively, the function of the gap 121 is not affected.

In this embodiment, the frame further comprises a push handle 13 connected to the handle 1 with a lower side thereof being movable up and down, so that when the stroller of the present invention is in a use state, a higher overall height can be maintained, thereby facilitating the stroller for parents; when the child stroller is folded, the push handle 13 can be moved downwards relative to the handle 1, so that the overall height of the folded handle 1 plus the push handle 13 is reduced, and the height of the folded child stroller is reduced.

In other embodiments, a push handle 13 with a lower side pivoted to the upper side of the handle 1 may be provided, so that when the stroller of the present invention is folded, the push handle 13 is rotated forward or backward to be close to the handle 1, thereby reducing the overall height of the folded handle 1+ the push handle 13.

In another embodiment, the handle 13 may not be provided, but the rider 1 may be directly provided with a longer length.

The lower side of the front foot 2 is provided with a front wheel 14, and the lower side of the rear foot 3 is provided with a rear wheel 15.

In this embodiment, the frame includes left and right side frames 100 connected to each other, and each of the side frames 100 includes the rider 1, the front leg 2, the rear leg 3, the first connecting member 4, the second connecting member 5, the third connecting member 6, the fourth connecting member 7, and a sliding base 8 connected to the front leg 2 to be capable of moving up and down relatively.

Preferably, the rear legs 3 of the two side brackets are respectively pivoted to the outer sides of the rider 1 or/and the front leg 2 of the corresponding side bracket, and the distance between the front legs 2 of the left and right side brackets is smaller than that between the rear legs 3 of the left and right side brackets. Therefore, after the bicycle frame is folded, the two front legs 2 are positioned between the two rear legs 3 and are approximately parallel to the two rear legs 3, so that the folded bicycle frame is flat and small in overall size.

In the above description of the orientation, the front wheel 14 is located at the front, the rear wheel 15 is located at the rear, the rider 1 is located at the upper, the front wheel 14 and the rear wheel 15 are located at the lower, the two side brackets 100 are located at the left and right, the opposite sides of the two side brackets 100 are located at the inner and outer sides, and vice versa. It will be appreciated that if the viewing direction is changed, the orientation will change accordingly.

Claims (25)

1. A stroller comprising a frame convertible between an unfolded position and a folded position, characterized in that: the frame comprises a driver, a front foot, a rear foot, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a sliding seat which can be connected with the front foot in a relatively up-and-down moving manner; the lower side of the driver is pivoted with the upper side of the front foot, and the front side of the rear foot is pivoted with the driver or/and the front foot; one side of the first connecting piece is pivoted with the driver, one side of the second connecting piece is pivoted with the first connecting piece, the other side of the second connecting piece is pivoted with the front leg, and the driver, the front leg, the first connecting piece and the second connecting piece form a four-bar linkage structure; the upper side of the third connecting piece is pivoted with the first connecting piece or/and the second connecting piece, and the lower side of the third connecting piece is pivoted with the sliding seat; the front side of the fourth connecting piece is pivoted on the sliding seat, and the rear side of the fourth connecting piece is pivoted on the rear foot.

2. The stroller of claim 1, wherein: the other side of the second connecting piece is rotatably pivoted to the front foot around a third rotating shaft, the lower side of the third connecting piece is rotatably pivoted to the sliding seat around a fourth rotating shaft, and the fourth rotating shaft is positioned on the lower side of the third rotating shaft.

3. The stroller of claim 2, wherein: the rear foot is pivoted to the front foot or/and the front foot in a rotating manner around a fifth rotating shaft, the fourth connecting piece is pivoted to the rear foot in a rotating manner around a sixth rotating shaft, and the sixth rotating shaft is positioned on the lower side or/and the rear side of the fifth rotating shaft.

4. The stroller of claim 3, wherein: the front leg, rear leg, slide, fourth link are arranged such that the rear leg is substantially parallel to the front leg when the frame is in the folded condition.

5. The stroller of claim 1, 2, 3, or 4, wherein: the stroller further comprises a seat supporting piece extending forwards and backwards, and the seat supporting piece is fixedly connected with the first connecting piece.

6. The stroller of claim 5, wherein: the pivoting position of the first connecting piece and the driver is positioned above the fixed connecting position of the first connecting piece and the seat supporting piece.

7. The stroller of claim 6, wherein: when the frame is in the folded condition, the seat support rotates to a position substantially parallel to the front leg.

8. Child stroller according to any of claims 1 to 4, 6 and 7, characterized in that: the upper end of the front foot is fixedly connected with a pivoting piece, and the upper side of the pivoting piece extends into the lower side of the driver and is pivoted with the driver.

9. The stroller of claim 8, wherein: the upper side of the fixed seat is fixedly connected into the lower side of the driver, a gap communicated with the interior of the driver is formed in the lower side of the fixed seat, and the upper side of the pivoting piece extends into the gap and is pivoted in the fixed seat and the driver; and the gap is set in such a way that at least part of the pivot joint extending into the gap can rotate relatively to the outside of the gap during the folding process of the bicycle frame.

10. The stroller of claim 9, wherein: when the frame is in the folded state, the rider rotates to a state approximately parallel to the front leg.

11. The stroller of claim 9, wherein: the fixing seat comprises a first fixing part and a second fixing part which are fixedly connected relatively, and the gap is formed between the first fixing seat and the second fixing seat.

12. The stroller of claim 11, wherein: the opposite sides of the first fixing piece and the second fixing piece are fixedly connected with a first reinforcing piece and a second reinforcing piece respectively.

13. The stroller of claim 8, wherein: the locking mechanism comprises a matching part arranged on the upper side of the pivoting part, a locking part which can be connected in the driver in a relatively up-and-down moving mode, and an elastic resetting part arranged between the locking part and the driver, wherein the locking part is arranged at the lower end of the locking part; when the frame is in the expansion state, under the effect of elasticity piece that resets, the locking piece moves down, and its locking part cooperates with cooperation portion on the pivot joint piece to the driver can not rotate with the preceding foot relatively.

14. The stroller of claim 13, wherein: the matching part is an abutting part arranged on the upper side of the pivot piece, and when the frame is in an unfolded state, the locking part abuts against the rear side of the abutting part; or, the matching part is arranged in a groove which is opened upwards and arranged on the upper side of the pivoting part, and the locking part is inserted into the groove when the frame is in an unfolding state.

15. Child stroller according to any of claims 9 to 11, characterized in that: the locking mechanism comprises a matching part arranged on the upper side of the pivoting part, a locking part which can be connected in the driver in a relatively up-and-down moving mode, and an elastic resetting part arranged between the locking part and the driver, wherein the locking part is arranged at the lower end of the locking part; when the frame is in the expansion state, under the effect of elasticity piece that resets, the locking piece moves down, and its locking part cooperates with cooperation portion on the pivot joint piece to the driver can not rotate with the preceding foot relatively.

16. The stroller of claim 15, wherein: the matching part is an abutting part arranged on the upper side of the pivot piece, and when the frame is in an unfolded state, the locking part abuts against the rear side of the abutting part; or, the matching part is arranged in a groove which is opened upwards and arranged on the upper side of the pivoting part, and the locking part is inserted into the groove when the frame is in an unfolding state.

17. Child stroller according to any one of claims 1 to 4, 6 to 7, 9 to 14, 16, characterized in that: first connecting piece one side around a first pivot rotatory ground pivot in the car hand, second connecting piece one side around a second pivot rotatory ground pivot in first connecting piece, the second pivot is located first pivot downside, the second pivot still is located first pivot front side.

18. The stroller of claim 5, wherein: first connecting piece one side around a first pivot rotatory ground pivot in the car hand, second connecting piece one side around a second pivot rotatory ground pivot in first connecting piece, the second pivot is located first pivot downside, the second pivot still is located first pivot front side.

19. The stroller of claim 8, wherein: first connecting piece one side around a first pivot rotatory ground pivot in the car hand, second connecting piece one side around a second pivot rotatory ground pivot in first connecting piece, the second pivot is located first pivot downside, the second pivot still is located first pivot front side.

20. The stroller of claim 15, wherein: first connecting piece one side around a first pivot rotatory ground pivot in the car hand, second connecting piece one side around a second pivot rotatory ground pivot in first connecting piece, the second pivot is located first pivot downside, the second pivot still is located first pivot front side.

21. The stroller of any of claims 1-4, 6-7, 9-14, 16, 18-20, wherein: the frame comprises left and right side supports which are connected, and each side support comprises the rider, a front foot, a rear foot, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a sliding seat which can be connected with the front foot in a relatively up-and-down moving mode.

22. The stroller of claim 5, wherein: the frame comprises left and right side supports which are connected, and each side support comprises the rider, a front foot, a rear foot, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a sliding seat which can be connected with the front foot in a relatively up-and-down moving mode.

23. The stroller of claim 8, wherein: the frame comprises left and right side supports which are connected, and each side support comprises the rider, a front foot, a rear foot, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a sliding seat which can be connected with the front foot in a relatively up-and-down moving mode.

24. The stroller of claim 15, wherein: the frame comprises left and right side supports which are connected, and each side support comprises the rider, a front foot, a rear foot, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a sliding seat which can be connected with the front foot in a relatively up-and-down moving mode.

25. The stroller of claim 17, wherein: the frame comprises left and right side supports which are connected, and each side support comprises the rider, a front foot, a rear foot, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a sliding seat which can be connected with the front foot in a relatively up-and-down moving mode.

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