CN111619645A

CN111619645A - Children's barrow

Info

Publication number: CN111619645A
Application number: CN201910877880.3A
Authority: CN
Inventors: 彭水毅; 祝军旺
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-09-04
Anticipated expiration: 2039-09-17
Also published as: CN111619645B

Abstract

The invention discloses a children's barrow, which comprises a frame, wherein the frame comprises a first supporting piece, a second supporting piece, a first connecting piece, a second connecting piece, a third connecting piece, a sliding piece and a handle, wherein the front end of the second supporting piece is pivoted with the rear end of the first supporting piece, the rear end of the first connecting piece is pivoted with the front end of the first connecting piece, the rear end of the third connecting piece is pivoted with the second supporting piece, the sliding piece is connected with the first supporting piece in a relatively sliding way, the lower end of the handle is pivoted with the rear end of the first supporting piece, the lower end of the second connecting piece and the front end of the third connecting piece are both pivoted with the sliding piece, the children's barrow also comprises a first locking device and a second locking device, the first locking device is arranged between the sliding piece and the first supporting piece, the first locking device is arranged between the lower end of the handle and the rear end of the first supporting piece, the rotating handle can, therefore, the unlocking and folding operations are simple, and the folded frame has small volume and is convenient to carry and store.

Description

Children's barrow

Technical Field

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

Background

The stroller is widely used in a family with a child due to its practicality and convenience of folding. The stroller generally comprises a frame capable of being converted between an unfolded state and a folded state, and a locking mechanism capable of locking the frame in the unfolded state, wherein when the frame is in the unfolded state, the frame is available for use; when the bicycle frame is not needed to be used or is carried about, the bicycle frame locking mechanism is unlocked firstly, and then the bicycle frame is folded, so that the volume of the folded bicycle frame is smaller than that of the unfolded bicycle frame, and the bicycle frame is relatively convenient to store and carry.

The frame structure of different children's shallow is different, and its unblock, folding mode are also different, and the unblock of some children's shallow, folding operation are very troublesome, must carry out multiple operation in the position of difference respectively, and the volume of timber is still bigger after folding moreover.

Disclosure of Invention

The invention aims to overcome the defects and provide the child stroller, which is simple in unlocking operation, small in folded frame volume and convenient to store and carry.

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

a children's barrow comprises a frame capable of being converted between an unfolded state and a folded state, wherein the frame comprises a first supporting piece, a front end, a second supporting piece pivoted at the rear end of the first supporting piece, a first connecting piece pivoted with the first supporting piece or/and the second supporting piece, a second connecting piece pivoted with the front end of the first connecting piece, a third connecting piece pivoted with the rear end of the first supporting piece, a handle connected with the first supporting piece at the lower end of the first supporting piece or/and the front end of the second supporting piece in a relatively sliding manner, a sliding piece connected with the first supporting piece at the lower end of the first supporting piece, a handle pivoted with the first supporting piece at the rear end of the first supporting piece or/and the front end of the second supporting piece at the lower end of the second connecting piece and the front end of the third connecting piece at the same time, a first locking device used for limiting the sliding piece between the sliding piece and the first supporting piece and the handle at the rear end of the first supporting piece or/and the front And the second locking device rotates relatively, and the first locking device can be unlocked by rotating the driver after the second locking device is unlocked.

Child cart still includes a first connecting seat, first connecting seat includes first connecting portion, two separately certainly first connecting portion upper end both sides are toward the second connecting portion that outer interval extended, a first roating seat of handlebar hand lower extreme fixedly connected with, first roating seat downside pin joint in between two second connecting portions, second locking device set up in between first roating seat and two second connecting portions.

A first unlocking piece is arranged between the first rotating seat and the second locking device, a driver is rotated after the second locking device is unlocked, and the first rotating seat rotating along with the driver can push the first unlocking piece to move downwards to unlock the first locking device.

The lower end of the first rotating seat is provided with a first accommodating groove, the part of the top wall of the first accommodating groove, which extends along the rotating direction of the first rotating seat, is arranged in an arc shape or an inclined plane shape, the lower side of the first unlocking piece can be connected into the first supporting piece in a relatively up-and-down moving manner, the middle of the upper end of the first connecting part is provided with a first through hole, and when the frame is in an unfolded state, the upper end of the first unlocking piece upwards penetrates through the first through hole and then is clamped into the first accommodating groove; when the first rotating seat rotates, the extended part of the top wall of the first accommodating groove pushes the first release part to move downwards.

The first locking device comprises a first through hole formed in the side wall of the first support piece, a first locking hole formed in the side wall of the sliding piece and corresponding to the first through hole, a first locking piece connected in the first support piece in a relatively movable mode, and a first spring arranged between the first locking piece and the first support piece, wherein under the action of the first spring, one side of the first locking piece penetrates through the first through hole and then is clamped into the first locking hole.

The second locking device comprises a second locking piece and a third locking piece, wherein one side of the second locking piece is connected with the second locking piece and the third locking piece in the first rotating seat in a relatively movable manner, a second locking hole and a third locking hole are formed in the second connecting portion and the second connecting portion respectively, a second spring is arranged between the second locking piece and the first rotating seat, and a third spring is arranged between the third locking piece and the first rotating seat.

The lower side of a second unlocking piece can be connected in the driver or/and the first rotating seat in a relatively up-and-down moving mode, the second unlocking piece is matched with the second locking piece and the third locking piece, and the second unlocking piece is driven to move downwards to force the second locking piece and the third locking piece to move in opposite directions and to be disengaged from the second locking hole and the third locking hole respectively.

The second locking piece comprises a second body, a second matching part and a second clamping part, wherein the second matching part and the second clamping part extend from the second body to the opposite side; the third locking piece includes the third body and certainly third cooperation portion and third block portion that the third body extends toward the homonymy, second cooperation portion and third cooperation position are located the homonymy, the second locking piece with second cooperation portion and third cooperation portion cooperate the setting second spring and third spring's effect down, the reverse side of second block portion and third block portion is blocked respectively in second locking hole and the third locking hole.

The child stroller further comprises a push handle rod, the lower end of the push handle rod is pivoted with the upper end of the handle, a third locking device used for limiting the relative rotation of the push handle rod and the handle is arranged between the lower end of the push handle rod and the upper end of the handle, and after the third locking device is unlocked, the push handle rod is rotated to drive the second unlocking piece to move downwards to unlock the second locking device.

A third accommodating space is formed in the lower side of the second rotating seat, the third locking device comprises a fourth locking piece which is connected in the third accommodating space in a relatively movable manner, a fourth spring which is arranged between the fourth locking piece and the second rotating seat, a locking pin which is connected to one side of the fourth locking piece, and a matching groove which is arranged on the second rotating seat, one side of the locking pin is inserted into the matching groove, the matching groove comprises an arc-shaped groove and a fourth locking hole which extends from one end of the arc-shaped groove to one side, and one side of the locking pin is clamped into the fourth locking hole when the frame is in an unfolded state; during the rotation of the second rotary seat, one side of the locking pin moves in the arc-shaped groove.

And a third unlocking piece can be connected with the push handle rod or/and the second rotating seat in a relatively up-and-down moving mode, the lower end of the third unlocking piece is matched with the fourth locking piece, and the third locking device can be unlocked by moving the third unlocking piece downwards.

The invention has the beneficial effects that:

1. when the child stroller is folded, the first locking device can be unlocked by rotating the handle after the second locking device is unlocked, and the first supporting piece, the second supporting piece, the first connecting piece, the second connecting piece and the third connecting piece are linked to rotate and approach, so that the child stroller is simple in unlocking and folding operations;

2. the structure of the frame enables the first supporting piece to rotate backwards to be close to the second supporting piece and the rider to rotate downwards to be close to the second supporting piece after the frame is folded, the first connecting piece and the second connecting piece are basically located on the same plane and are also close to the first supporting piece, the distance between the two second supporting pieces is also reduced, namely, all components of the frame are folded together, and the folded frame is very small in volume and very convenient to carry and store.

3. The push handle rod is arranged, so that when the frame is in an unfolded state, the integral height of the handle and the push handle rod enables a trammer not to bend down, and the use is very convenient; when the child stroller is folded, the locking mechanisms can be linked to unlock only by driving the third unlocking piece to move downwards and rotating the push handle rod along the trend, and other components of the frame such as a handle can also be linked to rotate to be close to the frame to be folded, so that the convenience of unlocking and folding operations is not influenced by the arrangement of the push handle rod; and after the frame is folded, the push handle rod also rotates and moves to be close to the handlebar and the second support frame, so that the push handle rod has little influence on the whole volume of the folded frame.

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 state

FIG. 3 is a second schematic perspective view of the stroller of the present invention in a deployed state;

FIG. 4 is an enlarged view of the first connecting seat of the stroller of the present invention;

FIG. 5 is a schematic cross-sectional view of the stroller in a deployed state;

FIG. 6 is an enlarged view of section E of FIG. 5;

FIG. 7 is an enlarged perspective view of the portion A in FIG. 1;

fig. 8 is an exploded enlarged schematic view according to fig. 7;

FIG. 9 is an exploded view schematically illustrating part B of FIG. 1;

FIG. 10 is an enlarged cross-sectional view taken along line B1-B1 of FIG. 7;

FIG. 11 is an enlarged view of the first rotary seat of the stroller of the present invention;

FIG. 12 is an enlarged view of the stroller of the present invention after the first rotary seat is combined with the third locking member of the second locking member;

fig. 13 is an exploded perspective view according to part C of fig. 1;

fig. 14 is an enlarged schematic view of an exploded plan view according to part C of fig. 1;

FIG. 15 is an enlarged view of the second rotary seat of the stroller of the present invention;

FIG. 16 is an enlarged schematic view of section F of FIG. 5;

FIG. 17 is an exploded view schematically illustrating part D of FIG. 1;

FIG. 18 is a first schematic view of the stroller of the present invention during folding;

FIG. 19 is a schematic cross-sectional view according to FIG. 18;

FIG. 20 is an enlarged schematic view taken along section G of FIG. 19;

FIG. 21 is an enlarged view taken along section H in FIG. 19;

FIG. 22 is a schematic view of the stroller of the present invention during folding;

FIG. 23 is a schematic plan view of the stroller of the present invention shown folded;

FIG. 24 is a schematic perspective view of the folded stroller of the present invention;

FIG. 25 is a schematic view of the stroller of the present invention in a deployed configuration when combined with a seat;

fig. 26 is a schematic view of the stroller of the present invention in a folded configuration in combination with a seat.

Detailed Description

As shown in fig. 1, 2 and 3, the stroller of the present invention comprises a frame capable of being converted between an unfolded state and a folded state, wherein the frame comprises a first support member 1, a second support member 2 having a front end pivotally connected to a rear end of the first support member 1, a first connecting member 3 having a rear end pivotally connected to the first support member 1 or/and the second support member 2, a second connecting member 4 having an upper end pivotally connected to a front end of the first connecting member 3, a third connecting member 5 having a rear end pivotally connected to the second support member 2, a sliding member 6 relatively slidably connected to the first support member 1, a handle 7 having a lower end pivotally connected to a rear end of the first support member 1 or/and a front end of the second support member 2, a lower end of the second connecting member 4 and a front end of the third connecting member 5 are both pivotally connected to the sliding member 6, and a first locking device disposed between the sliding member 6 and the first support member 1 for limiting the relative sliding movement of the sliding member 6 and the first support member, And the second locking device is arranged between the lower end of the driver 7 and the rear end of the first support piece 1 or/and the front end of the second support piece 2 and used for limiting the relative rotation of the driver 7, and the first locking device can be unlocked by rotating the driver 7 after the second locking device is unlocked.

As shown in fig. 4, in this embodiment, preferably, the first connecting seat 8 includes a first connecting portion 81 and two second connecting portions 82 extending outward from two sides of an upper end of the first connecting portion 81 at intervals, a first rotating seat 71 is fixedly connected to a lower end of the handle 7, a lower side of the first rotating seat 71 is pivoted between the two second connecting portions 82, the second locking device is disposed between the first rotating seat 71 and the two second connecting portions 82, an upper end of the first supporting member 1 is fixedly connected to the first connecting portion 81, and upper ends of the two second supporting members 2 are pivoted to the two second connecting portions 82; or, the upper end of the first supporting member 1 is pivoted to the first connecting portion 81, and the upper ends of the two second supporting members 2 are respectively and fixedly connected to the two second connecting portions 82; or, the upper end of the first supporting member 1 is pivotally connected to the first connecting portion 81, and the upper ends of the two second supporting members 2 are pivotally connected to the two second connecting portions 82, respectively.

As shown in fig. 4 to 8, a first release 72 is disposed between the first rotating base 71 and the second locking device, the rider 7 is rotated after unlocking the second locking device, and the first rotating base 71 rotating with the rider 7 pushes the first release 72 to move downward to unlock the first locking device.

A first receiving groove 711 is formed in the lower end of the first rotating seat 71, a portion 712 of the top wall of the first receiving groove 711, which extends along the rotating direction of the first rotating seat 71, is arc-shaped or inclined, and when the frame is in the unfolded state, the upper end of the first locking and releasing piece 72 is clamped in the first receiving groove 711; when the first rotating base 71 rotates, the portion 712 extending from the top wall of the first receiving groove 711 pushes the first locking element 72 to move downward. Preferably, the first receiving groove 711 is configured such that when the first release member 72 moves downward until the upper end thereof is completely separated from the first receiving groove 711, the first locking device is unlocked, and when the first rotating base 71 continues to rotate, the upper end of the first release member 72 contacts with the outer wall of the first rotating base 71, so that the first locking device is always in an unlocked state.

The lower side of the first unlocking piece 72 is connected to the first support member 1 in a relatively up-and-down moving manner, a first through hole 83 (fig. 9) is formed in the middle of the upper end of the first connecting portion 81, and the upper end of the first unlocking piece 72 is inserted into the first accommodating groove 711 after passing through the first through hole 83. The first locking device comprises a first through hole 110 arranged on the side wall of the first support member 1, a first locking hole 61 arranged on the side wall of the sliding member 6 and corresponding to the first through hole 110, a first locking member 62 connected in the first support member 1 in a relatively movable manner, and a first spring 63 arranged between the first locking member 62 and the first support member 1, wherein under the action of the first spring 63, one side of the first locking member 62 passes through the first through hole 110 and then is clamped into the first locking hole 61, so that the sliding member 6 cannot slide relative to the first support member 1, and the first locking device is in a locked state.

The first locking member 62 is provided with a first driven inclined surface 621, and the lower end of the first unlocking member 72 is provided with a first driving inclined surface 721 matched with the first driven inclined surface 621, so that when the first unlocking member 72 is pushed to move downwards, the first locking member 62 is pushed to move towards the side where the first spring 63 is arranged to disengage from the first locking hole 61 through the matching of the first driven inclined surface 621 and the first driving inclined surface 721, at this time, the first locking device is unlocked, and the sliding member 6 can move relative to the first support member 1.

In this embodiment, the first locking member 62 is provided with a driving cavity opened upward, and one side surface of the driving cavity is provided with the first driven slope 621.

In this embodiment, a second connecting seat 64 is fixedly connected to the inside of the first supporting member 1, a first accommodating cavity 641 is disposed in the second connecting seat 64, one side of the first locking member 62 is movably connected to the first accommodating cavity 641, the first spring 63 is disposed between the other side of the first locking member 62 and a side wall of the corresponding side of the first accommodating cavity 641, the side wall of the first accommodating cavity 641 is provided with a first through hole 642 corresponding to the first through hole 110, and under the action of the first spring 63, one side of the first locking member 62 passes through the first through hole 642 and the first through hole 110 and then is clamped into the first locking hole 61.

Correspondingly, a communication hole 643 communicating with the first receiving cavity 641 is disposed at the upper side of the second connecting seat 64, and the lower end of the first release member 72 downwardly passes through the communication hole 643 to be matched with the first locking member 62.

In this embodiment, the first release member 72 includes a first linkage member 722 and a first driving member 723, which are connected to each other, the first active inclined surface 721 is disposed at a lower end of the first driving member 723, and an upper end of the first linkage member 722 is clamped into the first receiving groove 711 when the frame is in the unfolded state. In other embodiments, first release 72 may be integral.

As shown in fig. 9 to 12, the second locking device includes a second locking member 91 and a third locking member 92, which are connected to the first rotating base 71 such that one side of the second locking member is relatively movable, a second locking hole 820 and a third locking hole 821 which are respectively disposed on the two second connecting portions 82, a second spring 93 disposed between the second locking member 91 and the first rotating base 71, and a third spring 94 disposed between the third locking member 92 and the first rotating base 71, wherein the second locking member 91 is located above the third locking member 92, and opposite sides of the second locking member 91 and the third locking member 92 are respectively engaged with the second locking hole 820 and the third locking hole 821 by the action of the second spring 93 and the third spring 94.

A second release member 10 is connected to the rider 7 and/or the first rotating base 71 so as to be able to move up and down relatively, and the second release member 10 is disposed in cooperation with the second locking member 91 and the third locking member 92, so that driving the second release member 10 to move down can force the second locking member 91 and the third locking member 92 to move in opposite directions and disengage from the second locking hole 820 and the third locking hole 821, respectively. In this way, the second locking mechanism is unlocked, and the first rotating base 71 can rotate relative to the first connecting base 8.

The second lock member 91 includes a second body 911, a second engagement portion 912 and a second engagement portion 913 extending from the second body 911 to the opposite side; the third locking element 92 includes a third body 921, a third matching portion 922 and a third engaging portion 923 extending from the third body 921 to the same side, the second matching portion 912 and the third matching portion 922 are located at the same side, and the second locking element 91 is matched with the second matching portion 912 and the third matching portion 922; by the second spring 93 and the third spring 94, the opposite sides of the second engaging portion 913 and the third engaging portion 923 are engaged with the second locking hole 820 and the third locking hole 821, respectively.

The second unlocking piece 10 is provided with a second driving inclined surface 101 and a third driving inclined surface 102 which are vertically spaced, the inclined directions of the second driving inclined surface 101 and the third driving inclined surface 102 are opposite, the second matching portion 912 is provided with a second driven inclined surface 9121 matched with the second driving inclined surface 101, the third matching portion 922 is provided with a third driven inclined surface 9221 matched with the third driving inclined surface 102, and the inclined directions of the second driving inclined surface 101 and the third driving inclined surface 102 are also opposite. Therefore, when the second locking member 91 moves downward, the second engaging portion 913 moves to one side to disengage from the second locking hole 820 by the engagement between the second driving inclined surface 101 and the second driven inclined surface 9121, and the third engaging portion 923 moves to the opposite side to disengage from the third locking hole 821 by the engagement between the third driving inclined surface 102 and the third driven inclined surface 9221.

In this embodiment, the second matching portion 912 has a through hole 9122 penetrating up and down, and the third driving inclined surface 102 of the second release 10 downwardly passes through the through hole 9122 of the second matching portion 912 and then matches with the third driven inclined surface 9221.

The upper end surface of the second matching portion 912 is recessed downwards obliquely at two sides of the through hole 9122 to form two second driven inclined surfaces 9121, and correspondingly, the two sides of the second unlocking piece 10 are provided with the second driving inclined surfaces 101. So that the lower side of the second release 10 passes downward through the through hole 9122, and the second active inclined surfaces 101 at both sides thereof are respectively engaged with the two second active inclined surfaces 101.

The third mating portion 922 is provided with a groove with an upward opening, one side wall of the groove is provided as the third driven inclined surface 9221, and the lower end surface of the second unlocking member 10 is provided as the third driving inclined surface 102.

Preferably, an upper receiving space 711 and a lower receiving space 712 which are vertically communicated are disposed in the lower side of the first rotating base 71, one side of the second locking member 91 is disposed in the upper receiving space 711 in a relatively movable manner, and one side of the third locking member 92 is disposed in the lower receiving space 712 in a relatively movable manner. The upper receiving space 711 communicates with the lower receiving space 712 so that the lower side of the second release 10 can pass through.

The sidewalls of the upper receiving space 711 and the lower receiving space 712 on the same side are respectively provided with a second guiding receiving groove 713 and a third guiding receiving groove 714 into which the second matching portion 912 and the third matching portion 922 can be relatively movably inserted. The arrangement is such that the second locking member 91 and the third locking member 92 can move more smoothly without deviation.

Preferably, the second locking member 91 further includes a guiding post 914 extending from the body to one side, and the guiding post 914 and the second matching portion 912 extend in the same direction, and a guiding hole 715 is disposed on a side wall of the upper receiving space 711 corresponding to the side for the guiding post 914 to be inserted in a relatively movable manner. The second spring 93 is disposed between the second matching portion and the bottom wall of the second guiding accommodation groove 713 or between the guiding post 914 and the bottom wall of the guiding hole 715.

The side walls of the upper receiving space 711 and the lower receiving space 712 in opposite directions are respectively provided with a second through hole 716 and a third through hole 717, and opposite sides of the second engaging portion 913 and the third engaging portion 923 respectively penetrate through the second through hole 716 and the third through hole 717 and then are clamped into the second locking hole 820 and the third locking hole 821.

In this embodiment, the second locking hole 820 and the third locking hole 821 are respectively provided with three separated locking holes, and correspondingly, the second engaging portion 913 and the third engaging portion 923 are respectively provided with three locking rods. Correspondingly, the second perforation 716 and the third perforation 717 are respectively provided in three numbers.

In this embodiment, preferably, in order to make the two locking members and the two locking holes more fit better, the outer wall of at least one of the three clamping rods of the second locking member 91 is provided with a guide rib 915 in a protruding manner, the inner walls of the second through hole 716 and the second locking hole 820 corresponding to the clamping rod are provided with a guide groove 7161, and when the clamping rod passes through the corresponding second through hole 716 and is inserted into the corresponding clamping hole, the guide rib 915 is also inserted into the guide groove, thereby facilitating the fit of the second locking member 91 and the second locking hole 820. Similarly, the outer wall of at least one of the three locking rods of the third locking member 92 is protruded with a guide rib 925, and the inner walls of the corresponding third through hole 717 and the corresponding third locking hole 821 are provided with a guide groove 8210.

Preferably, the lower side of the first rotating base 71 is opened toward one side, and the side is connected with the base cover 11, and the upper receiving space 711 and the lower receiving space 712 which are communicated up and down are formed between the lower side of the first rotating base 71 and the base cover 11. The second through hole 716 is disposed on the seat cover 11. So configured, assembly of the second locking member 91 with the third locking member 92, the second spring, and the third spring is facilitated.

In this embodiment, the seat cover 11 includes a plate 111, a first connecting post 112 extending from the plate 111 to one side of the first rotating seat 71, and a partition plate 113, the first rotating seat 71 is provided with a corresponding second connecting post 718, the second connecting post 718 and the first connecting post 112 are locked and fixed by a countersunk head screw, so as to connect the seat cover 11 and the first rotating seat 71, and the partition plate 113 divides the space between the seat cover 11 and the first rotating seat 71 into the upper accommodating space 711 and the lower accommodating space 712 which are communicated with each other.

The second through hole 716 is disposed on the plate body 111. The third spring 94 is disposed between the plate 111 and the third locking member 92.

Referring to fig. 13 to 16, in this embodiment, the frame further preferably includes a push handle bar 12, and the lower end of the push handle bar 12 is pivotally connected to the upper end of the handle 7, so that the height of the handle 7 and the push handle bar 12 is the same as the height of the push handle bar 12 when the frame is in the unfolded state, so that a stroller needs not to bend over.

Preferably, a third locking device for limiting the relative rotation between the lower end of the push handle rod 12 and the upper end of the handlebar 7 is arranged between the lower end of the push handle rod 12 and the upper end of the handlebar 7, and after the third locking device is unlocked, the second unlocking piece 10 can be driven to move downwards to unlock the second locking device by rotating the push handle rod 12.

The lower end of the push handle rod 12 is fixedly connected to a second rotating seat 13, the upper end of the handlebar 7 is fixed to a third connecting seat 70, the second rotating seat 13 is pivoted with the third connecting seat 70, a third locking device is arranged between the second rotating seat and the third connecting seat, the push handle rod 12 is rotated after the third locking device is unlocked, and the second rotating seat 13 rotating along with the push handle rod 12 can push the second unlocking piece 10 to move downwards to unlock the second locking device.

The lower end of the second rotary seat 13 is provided with a second receiving groove 131, and a part 132 of the top wall of the second receiving groove 131, which extends along the rotation direction of the second rotary seat 13, is set to be arc-shaped or inclined-plane-shaped, when the frame is in an unfolded state, the upper end of the second release member 10 is clamped in the second receiving groove 131, and when the second rotary seat 13 rotates, the part 132 of the top wall extends to push the second release member 10 to move downwards to unlock the second locking device. Preferably, the second receiving groove 131 is configured such that when the second unlocking member 10 moves downward until the upper end thereof is completely separated from the second receiving groove 131, the second locking device is unlocked, and when the second rotating base 13 continues to rotate, the upper end of the second unlocking member 10 contacts the outer wall of the second rotating base 13, so that the second locking device is always in an unlocked state.

In this embodiment, the second release 10 includes a second transmission member 103, a second intermediate member 104, and a second driving member 105, which are connected in sequence, and the second active inclined surface and the third active inclined surface are disposed on the second driving member 105; when the frame is in the unfolded state, the upper end of the second transmission member 103 is clamped into the second accommodating groove 131.

A third receiving space 133 is formed in the lower side of the second rotary base 13, the third locking device includes a fourth locking member 14 relatively movably connected in the third receiving space 133, a fourth spring 15 disposed between the fourth locking member 14 and the second rotary base 13, a locking pin 16 connected to one side of the fourth locking member 14, and a matching groove 700 disposed on the third connecting base 70, one side of the locking pin 16 is inserted into the matching groove 700, the matching groove 700 includes an arc-shaped groove 701 and a fourth locking hole 702 extending from one end of the arc-shaped groove 701 to one side, when the frame is in the unfolded state, under the action of the fourth spring 15, the fourth locking member 14 moves toward the side connected with the locking pin 16, one side of the locking pin 16 is clamped in the fourth locking hole 702, and the second rotary base 13 cannot rotate relative to the third connecting base 70, the third locking device is in a locked state; when the fourth locking member 14 is moved away from the fourth locking hole 702, the locking pin 16 is disengaged from the fourth locking hole 702 and enters the arc-shaped groove 701, the third locking device is unlocked, the second rotating base 13 can rotate relative to the third connecting base 70, and during the rotation of the second rotating base 13 relative to the third connecting base 70, one side of the locking pin 16 moves in the arc-shaped groove 701, and the second unlocking member 10 is also pushed to move downward. In this embodiment, the fourth spring 15 is disposed between the other side of the fourth locking element 14 and the side wall of the corresponding side of the third accommodating space 133.

The matching groove 700 further includes a fifth locking hole 703 extending from the other end of the arc-shaped groove 701 to the other end, and when the frame is in the folded state, one side of the locking pin 16 is clamped into the fifth locking hole 703. Therefore, the child stroller disclosed by the invention can be locked in a folded state, so that the child stroller cannot be easily dispersed after being folded.

A protruding pillar 1331 extends from a side wall of the third receiving space 133, an extending direction of the protruding pillar 1331 is perpendicular to a moving direction of the fourth locking member 14, a long hole 141 is formed in the fourth locking member 14 along the moving direction, and the protruding pillar 1331 extends into the long hole 141, so that the fourth locking member 14 can be connected to the third receiving space 133 in a relatively movable manner. In other embodiments, a pivot may directly pass through the second rotating seat 13, the long hole 141 and the third connecting seat 70, so as to connect the second rotating seat 13, the long hole 141 and the third connecting seat 70.

In this embodiment, the third connecting seat 70 includes a fixed connection portion 704 connected to the upper end of the handle 7, two connection portions 705 extending upward from two sides of the upper end of the fixed connection portion 704, the second rotating seat 13 is pivoted between the two connection portions 705, a second through hole (not shown) is disposed in the middle of the upper end of the fixed connection portion 704, and the upper end of the second unlocking member 10 upwards passes through the second through hole and then is clamped into the second accommodating groove 131.

Correspondingly, the two connecting portions 705 are provided with the matching grooves 700, and two ends of the locking pin 16 are respectively clamped in the matching grooves 700 of the two connecting portions 705. In order not to interfere the movement of the locking pin 16, two side walls of the third accommodating space 133 are respectively provided with a through hole 1330 having the same extending direction as the moving direction of the fourth locking member 14, and two ends of the locking pin 16 respectively pass through the through holes 1330 on the two side walls of the third accommodating space 133 and then are inserted into the mating grooves 700 on the two connecting portions 705.

In other embodiments, the third connecting seat 70 may include only a fixed portion connected to the upper end of the rider 7 and a connecting portion extending upward from one side of the upper end of the fixed portion, and the second rotating seat 13 is pivotally connected to one side of the connecting portion. The other side of the upper end of the fixed connection part is provided with the second through hole.

The lower side of the second rotary seat 13 is open towards one side, and the side is connected with a shielding plate 135, the third accommodating space 133 is formed between the lower side of the second rotary seat 13 and the shielding plate 135, and the side walls of the shielding plate 135 and the lower side of the second rotary seat 13 far away from the shielding plate 135 are provided with the through hole 1330. So set up, can put the back with fourth spring earlier with fourth locking piece 14, be connected shutter 135 with second roating seat 13 to make things convenient for the equipment of fourth locking piece 14.

Cover plates 1431 are connected to opposite sides of the two connection portions 705 on the upper side of the third connection seat 70, and the cover plates 1431 can shield the fitting groove 700.

A third release 17 is connected to the handle bar 12 or/and the second rotating base 13 to move up and down, the lower end of the third release 17 is matched with the fourth locking member 14, and the third release 17 can be moved down to unlock the third locking device. Specifically, the third releasing member 17 is moved downwards to push the fourth locking member 14 to move away from the fourth locking hole 702, so that the locking pin 16 is moved to disengage from the fourth locking hole 702 and enter the arc-shaped groove 701, the third locking mechanism is unlocked, and the second rotating base 13 can rotate relative to the third connecting base 70.

Preferably, the lower end of the third release lock 17 is provided with a fourth driving inclined surface 170, and the fourth locking element 14 is provided with a corresponding fourth driven inclined surface 144, so that when the third release lock 17 is moved downwards, the fourth locking element 14 is pushed to move away from the fourth locking hole 702 by the interaction between the fourth driving inclined surface 170 and the fourth driven inclined surface 144.

The fourth locking member 14 includes a main body 145 and a driven portion 146 extending upward from an upper end of the main body 145, and the fourth driven slope 144 is disposed on the driven portion 146.

One end of the third release member 17 extends out of the handle bar 12, thereby facilitating the operation.

As shown in fig. 17, in this embodiment, a T-shaped handle 18 is fixedly connected to the upper end of the push handle rod 12, the upper end of the push handle rod 12 is connected to a vertical portion of the T-shaped handle 18, and when the folding mechanism is in the unfolded state, the upper end of the third release member 17 extends out of the upper end of a horizontal portion of the T-shaped handle 18, so as to press the third release member 17 downward.

The third release member 17 includes a button 171, a third transmission member 172, a third intermediate member 173 and a third driving member 174 connected from top to bottom, the fourth driving inclined surface 170 is disposed at the lower end of the third driving member 174, and when the stroller is in the unfolded state, the upper end of the button 171 extends out of the upper end of the transverse portion of the T-shaped handle 18. The third release member 17 is arranged in this way, so that the poor operation caused by easy damage due to the long whole third release member can be avoided.

A second accommodating cavity 181 and a third accommodating cavity 182 are respectively arranged at the transverse part and the vertical part of the T-shaped handle 18, a partition plate 183 is arranged between the second accommodating cavity 181 and the third accommodating cavity 182, a fourth through hole 184 is arranged on the partition plate 183 to enable the second accommodating cavity 181 to be communicated with the third accommodating cavity 182, a fifth through hole 1811 is arranged on the top wall of the second accommodating cavity 181 to allow the upper end of a button 171 to pass through, the lower side of the button 171 can be connected into the second accommodating cavity 181 in a relatively up-and-down moving manner, the lower side of a third transmission member 172 can be connected into the third accommodating cavity 182 in a relatively up-and-down moving manner, and the upper end of the third transmission member 172 upwards passes through the fourth through hole 184 and then extends into the second accommodating cavity 181 and is abutted against the lower end of the button 171. Thus, when the button 171 is pressed downward, the third transmission member 172, the third intermediate member 173, and the third driving member 174 all move downward to unlock the third locking mechanism.

Preferably, the button 171 is provided with a first flange 1711 protruding outward from the outer wall, and when the folding mechanism is in the unfolded state, the upper end of the first flange 1711 abuts against the top wall of the second accommodating cavity 181 around the fifth through hole 1811, so as to add one more limit to the upward movement of the button 171.

In other embodiments, the third release 17 may be integrally formed.

The T-shaped handle 18 includes a body 185 and a cover 186 connected to one side of the body 175, and the second receiving cavity 181 is formed between the body 185 and the cover 186. So configured, assembly of the button 171 is facilitated.

As shown in fig. 18 to 24, the folding operation of the stroller of the present invention is as follows:

when the button 171 is pressed downwards, the third transmission member 172, the third intermediate member 173 and the third driving member 174 all move downwards, and under the interaction between the fourth driving inclined surface 170 of the third driving member 174 and the fourth driven inclined surface 144 of the fourth locking member 14, the fourth locking member 14 moves towards the side away from the fourth locking hole, so that the locking pin 16 moves together to disengage from the fourth locking hole 702 and enter the arc-shaped groove 701, at this time, the third locking device is unlocked, and the second rotating seat 13 and the third connecting seat 70 can rotate relatively, that is, the push handle bar 12 can rotate relative to the handlebar 7;

rotating the handle bar 12 forward and downward, the second rotating base 13 and the locking pin 16 rotate together, and the rotating second rotating base 13 drives the second release member 10 to move downward, and the downward movement of the second release member 10 drives the second locking member 91 and the third locking member 92 to move away from the second locking hole 820 and the third locking hole 821; when the push handle bar 12 is rotated to a certain angle, the upper end of the second release member 10 is completely separated from the second receiving groove 131 (as shown in fig. 20), the second locking device is completely unlocked, and the rider 7 can rotate relative to the first supporting member 1;

at this time, the push handle rod 12 drives the upper end of the handle 7 to rotate backwards and downwards, so that the first rotating base 71 rotates together with the handle rod to push the first releasing piece 72 to move downwards, the first releasing piece 72 moving downwards drives the first locking piece 62 to move in a direction away from the first locking hole 61, when the handle 7 rotates to a certain angle, the upper end of the first releasing piece 72 is completely separated from the first accommodating groove 711 (as shown in fig. 21), the first locking device is also completely unlocked, and the sliding piece 6 can move upwards and downwards relative to the first supporting piece 1;

at this time, the second supporting member 2 can be used as a fulcrum, so that the supporting member 1 is lifted off the ground, the first supporting member 1 rotates backwards to lean against the direction of the second supporting member 2 under the action of gravity, and the first supporting member 1 can force the front end of the third connecting member 5 to push the sliding member 6 to move downwards along the first supporting member 1 when rotating, so as to drive the lower end of the second connecting member 4 to move downwards along the first supporting member 1 to rotate, and pull the front end of the first connecting member 3 to rotate downwards (as shown in fig. 22); until the first supporting part 1, the second supporting part 2, the first connecting part 3, the second connecting part 4, the third connecting part 5, the handlebar 7 and the push handle bar 12 relatively rotate to approach, the frame is in a folding state (as shown in fig. 23 and 24). The components of the folded frame are folded together, and the folded frame has small volume and is convenient to carry and store.

In the rotating process of the handle bar 12, the fourth spring 15 is compressed all the time, when the handle bar 12 rotates to a certain angle, the long hole 1330 on the second rotating seat 13 corresponds to the fifth locking hole 703, and under the action of the restoring force of the fourth spring 15, the fourth locking piece 14 moves to one side connected with the locking pin 16 again, so that the locking pin 16 moves together and is clamped in the fifth locking hole 703, and at the moment, the stroller of the present invention is just in the folded state, so that the stroller of the present invention is locked in the folded state and cannot be easily unfolded, thereby facilitating the taking. And during the process of moving the fourth locking element 14 again, the fourth driven inclined surface 144 pushes the fourth driving inclined surface 170, so that the third release 17 moves upward, and the upper end of the third release 17 protrudes out of the upper end of the handle 18 again.

When the folded stroller of the present invention is adjusted to the unfolded state again, the button 171 is pressed downward, that is, the third locking element 17 is pushed downward, so that the fourth locking element 14 moves to drive the locking pin 16 to disengage from the fifth locking hole 703 and enter the arc-shaped groove 701 again, and then the handle bar 12 is rotated reversely and the handle 7 is pulled to rotate reversely, so that the first rotary seat 71 and the second rotary seat 13 rotate reversely; when the second rotary base 13 rotates to a certain angle, the second receiving groove 131 faces the second unlocking member 10 again, so that the second locking member 91 and the third locking member 92 move to the locking position under the restoring force of the second spring 93 and the third spring 94, thereby pushing the second unlocking member 10 to move upwards; when the first rotating base 71 rotates to a certain angle, the first receiving groove 711 faces the first unlocking piece 72 again, so that the first locking piece 62 moves to the locking position under the restoring force of the first spring 63, thereby pushing the first unlocking piece 72 to move upwards; when the first, second, third, and fourth locking members 62, 91, 92, and 14 are again in the locked state, the frame is also fully unfolded, and the frame is locked in the unfolded state.

As described above, as long as the third unlocking piece is driven to move downwards and the push handle rod is rotated along with the movement, each locking mechanism can be interlocked for unlocking, and other components of the frame can be interlocked and rotated to be close to the frame for folding, so that the unlocking and folding operations of children are very simple; moreover, the structure of the frame of the children's cart of the invention enables the first supporting piece 1 to rotate backwards to be close to the second supporting piece 2 after the frame is folded, the handle 7 is relatively close to the push handle rod and is close to the second supporting piece 2 together with the push handle rod, the upper end of the handle 7 and the lower end of the push handle rod are close to the lower side of the second supporting piece 2, the lower end of the handle 2 and the upper end of the push handle rod are approximately close to the first connecting seat 8, the first connecting piece 3 and the second connecting piece 4 are basically positioned on the same plane and are also close to the first supporting piece 1, and the distance between the two second supporting pieces 2 is also reduced, namely, all components of the frame are folded together, so that the folded frame is very small in volume and is very convenient to carry and store.

When the stroller frame is in a folded state, the upper side of the push handle rod is located between the two second connecting portions, and the handle 18 is located above the two second connecting portions. Therefore, the folded frame tends to be flatter, and the volume of the folded frame is smaller.

In other embodiments, the push handle bar may not be provided, but an operating element (not shown) that can move up and down relatively is connected to the outer side of the handle 7, the operating element is connected to the second unlocking element, and a corresponding avoiding hole is provided on the wall of the handle tube, so that the second locking device can be unlocked by directly moving down the operating element, the first locking device can be unlocked by rotating the handle backward and downward, and the first supporting element, the second supporting element, the first connecting element, the second connecting element, and the third connecting element are linked to rotate to approach each other, so that the frame is in a folded state. Therefore, the unlocking and folding operations are very simple, and the volume of the folded frame is very small.

In this embodiment, preferably, the first connecting seat 8 is further pivotally connected with a carrying handle 80, so as to facilitate carrying the folded frame.

The rear end of the first connecting member 3 is pivotally connected to the first connecting seat 8, and in this embodiment, two first connecting members 3 are provided, so that the first connecting members 3 are connected more stably.

The first connecting base 8 further includes a third connecting portion 84 extending from the upper end of the first connecting portion 81 to the upper side, and the rear end of the first connecting member 3 is pivotally connected to the third connecting portion 84.

In this embodiment, the third connecting member 5 has two ends, the front end of the third connecting member is pivotally connected to the moving member 6, and the rear end of the third connecting member is pivotally connected to the two second supporting members 2. In other embodiments, only one third connecting member 5 may be provided, the two second supporting members 2 are respectively connected to the left and right ends of a cross bar, and the third connecting member 5 is pivotally connected to the middle of the cross bar.

Preferably, the frame comprises two second connecting pieces 4, the upper ends of the two second connecting pieces 4 are respectively pivoted to the left side and the right side of the upper end of the first connecting piece 3, and the lower ends of the two second connecting pieces are pivoted to the sliding piece 6. In this way, the first connecting member 3 can be supported more stably. In other embodiments, only one second connecting element 4 may be provided.

In this embodiment, a first wheel set 20 is connected to the front lower portion of the first supporting member 1, and a second wheel set 30 is connected to the rear lower portion of the second supporting member 2. Preferably, the first wheel set 20 is a universal wheel, so that when the frame is folded, the first wheel set 20 can steer to avoid interference with the second wheel set 30, so that the second wheel set 30 can be as close to the first support member 1 as possible, and the folding volume is further reduced.

As shown in fig. 25 and 26, in the present embodiment, a seat 19 is connected to the first connecting member 3, that is, the first connecting member 13 is configured to be connected to a seat, the seat 19 includes a seat portion 191 and a backrest 192, the seat portion 191 is connected to the first connecting member 3, and the lower end of the backrest 192 is pivoted to the rear end of the seat portion 191, so that the backrest 192 can rotate relatively forward and downward to approach the seat portion 191, and during the frame folding process, the seat portion 191 can move along with the first connecting member 3 and rotate the backrest 192 to approach the seat portion 191 before or after the frame folding process, so that the seat is also in the folded state. After folding, the seating portion 191 and the backrest 192 are substantially parallel to the first connecting portion 81. Therefore, when the frame is folded, the frame can be not taken down, and the seat can be driven together, so that the folding operation of the whole baby stroller is simpler and more convenient.

The seat 19 further includes an armrest 193, and a rear end of the armrest 193 is pivotally connected to a lower end of the backrest 192 or/and a rear end of the seating portion 191, so that the armrest 193 can also rotate forward and downward to be adjacent to other components of the seat 19.

In this embodiment, the seat 19 can be disposed forward or backward relative to the first connecting member 3, and correspondingly, the first pedal 194 is connected to the front lower side of the first supporting member 1, and the second pedal 195 is connected to the second supporting member 2, so that the pedals can be used for the child to step on regardless of whether the seat 19 is disposed forward or backward.

Preferably, one end of the second pedal plate 195 is sleeved on the second support 2, and a pivot passes through the rear end of the first connector 3, the second pedal plate 195 and the second support 2, so as to achieve the purpose of pivotally connecting the rear end of the first connector 3 with the second support 2 and connecting the second pedal plate 195 with the second support 2, and the assembly is more convenient due to the connection.

In other embodiments, the first connecting element 3 can also be provided directly as part of a seat. Such as a book, the first link 3 is directly arranged as a sitting portion of a seat.

Claims

1. A stroller comprising a frame convertible between an unfolded state and a folded state, characterized in that: the frame comprises a first supporting part, a second supporting part, a first connecting part, a second connecting part, a third connecting part, a sliding part, a handle part, a first locking device and a second locking device, wherein the front end of the second supporting part is pivoted with the rear end of the first supporting part, the rear end of the third connecting part is pivoted with the second supporting part, the sliding part is connected with the first supporting part in a relatively sliding way, the handle part is pivoted with the rear end of the first supporting part or/and the front end of the second supporting part, the lower end of the second connecting part and the front end of the third connecting part are both pivoted with the sliding part, the child stroller further comprises a first locking device and a second locking device, the first locking device is arranged between the sliding part and the first supporting part and used for limiting the sliding of the sliding part and the handle part, the second locking device is arranged between the lower end of the handle part and the rear end of the first supporting part or/or the front end of the second, after the second locking device is unlocked, the first locking device can be unlocked by rotating the driver.

2. The stroller of claim 1, wherein: the first connecting seat comprises a first connecting part and two second connecting parts which respectively extend outwards from two sides of the upper end of the first connecting part at intervals, the lower end of the driver is fixedly connected with a first rotating seat, the lower side of the first rotating seat is pivoted between the two second connecting parts, and the second locking device is arranged between the first rotating seat and the two second connecting parts; the upper end of the first supporting piece is fixedly connected to the first connecting part, and the upper ends of the two second supporting pieces are respectively pivoted to the two second connecting parts; or the upper end of the first supporting piece is pivoted to the first connecting part, and the upper ends of the two second supporting pieces are respectively and fixedly connected to the two second connecting parts; or the upper end of the first supporting piece is pivoted to the first connecting part, and the upper ends of the two second supporting pieces are respectively pivoted to the two second connecting parts.

3. The stroller of claim 2, wherein: a first unlocking piece is arranged between the first rotating seat and the second locking device, a driver is rotated after the second locking device is unlocked, and the first rotating seat rotating along with the driver can push the first unlocking piece to move downwards to unlock the first locking device.

4. The stroller of claim 3, wherein: the lower end of the first rotating seat is provided with a first accommodating groove, the part of the top wall of the first accommodating groove, which extends along the rotating direction of the first rotating seat, is arranged in an arc shape or an inclined plane shape, the lower side of the first unlocking piece can be connected into the first supporting piece in a relatively up-and-down moving manner, the middle of the upper end of the first connecting part is provided with a first through hole, and when the frame is in an unfolded state, the upper end of the first unlocking piece upwards penetrates through the first through hole and then is clamped into the first accommodating groove; when the first rotating seat rotates, the extended part of the top wall of the first accommodating groove pushes the first release part to move downwards.

5. The stroller of claim 4, wherein: the first locking device comprises a first perforation arranged on the side wall of the first support piece, a first locking hole arranged on the side wall of the sliding piece and corresponding to the position of the first perforation, a first locking piece connected in the first support piece in a relatively movable manner, and a first spring arranged between the first locking piece and the first support piece, wherein under the action of the first spring, one side of the first locking piece passes through the first perforation and then is clamped into the first locking hole; preferably, the first locking member is provided with a first driven inclined surface, and the lower end of the first unlocking member is provided with a first driving inclined surface matched with the first driven inclined surface.

6. Child stroller according to any of claims 2 to 5, characterized in that: the second locking device comprises a second locking piece and a third locking piece, wherein one side of the second locking piece is connected with the second locking piece and the third locking piece in the first rotating seat in a relatively movable manner, a second locking hole and a third locking hole are formed in the second connecting portion and the second connecting portion respectively, a second spring is arranged between the second locking piece and the first rotating seat, and a third spring is arranged between the third locking piece and the first rotating seat.

7. The stroller of claim 6, wherein: the lower side of a second unlocking piece can be connected in the driver or/and the first rotating seat in a relatively up-and-down moving mode, the second unlocking piece is matched with the second locking piece and the third locking piece, and the second unlocking piece is driven to move downwards to force the second locking piece and the third locking piece to move in opposite directions and to be disengaged from the second locking hole and the third locking hole respectively.

8. The stroller of claim 7, wherein: the second locking piece comprises a second body, a second matching part and a second clamping part, wherein the second matching part and the second clamping part extend from the second body to the opposite side; the third locking piece comprises a third body, a third matching part and a third clamping part, wherein the third matching part and the third clamping part extend from the third body to the same side; preferably, the second unlocking piece is provided with a second driving inclined plane and a third driving inclined plane which are vertically spaced, the inclination directions of the second driving inclined plane and the third driving inclined plane are opposite, the second matching part is provided with a second driven inclined plane matched with the second driving inclined plane, the third matching part is provided with a third driven inclined plane matched with the third driving inclined plane, and the inclination directions of the second driving inclined plane and the third driving inclined plane are also opposite; preferably, the second locking piece is located on the upper side of the third locking piece, the second matching portion is provided with a through hole which penetrates through the second locking piece from top to bottom, and a third driving inclined surface of the second unlocking piece penetrates through the through hole of the second matching portion downwards and then is matched with the third driven inclined surface.

9. Child stroller according to claim 6 or 7 or 8, characterized in that: the lower end of the push handle rod is pivoted with the upper end of the handlebar, a third locking device used for limiting the relative rotation of the lower end of the push handle rod and the upper end of the handlebar is arranged between the lower end of the push handle rod and the upper end of the handlebar, and after the third locking device is unlocked, the second unlocking piece can be driven to move downwards by rotating the push handle rod so as to unlock the second locking device; preferably, the lower end of the push handle rod is fixedly connected to a second rotating seat, the upper end of the handlebar is fixedly connected to a third connecting seat, the second rotating seat is pivoted with the third connecting seat, the third locking device is arranged between the second rotating seat and the third connecting seat, the push handle rod is rotated after the third locking device is unlocked, and the second rotating seat rotating along with the push handle rod can push the second unlocking piece to move downwards to unlock the second locking device.

10. The stroller of claim 9, wherein: the second roating seat lower extreme is provided with the second storage tank, just the part that the second storage tank roof extends along the direction of rotation of second roating seat sets up to arc or inclined plane form when the frame is in under the expansion state, second release spare upper end card is gone into in the second storage tank, when the second roating seat is rotatory, the part that this roof extends promotes the second release spare and down moves.

11. The stroller of claim 9 or 10, wherein: a third accommodating space is formed in the lower side of the second rotating seat, the third locking device comprises a fourth locking piece which is connected in the third accommodating space in a relatively movable manner, a fourth spring which is arranged between the fourth locking piece and the second rotating seat, a locking pin which is connected to one side of the fourth locking piece, and a matching groove which is arranged on the second rotating seat, one side of the locking pin is inserted into the matching groove, the matching groove comprises an arc-shaped groove and a fourth locking hole which extends from one end of the arc-shaped groove to one side, and one side of the locking pin is clamped into the fourth locking hole when the frame is in an unfolded state; during the rotation process of the second rotating seat, one side of the locking pin moves in the arc-shaped groove; preferably, the matching groove further comprises a fifth locking hole extending from the other end of the arc-shaped groove to the other side, and when the frame is in a folded state, the end part of the locking pin is clamped into the fifth locking hole.

12. The stroller of claim 11, wherein: a third unlocking piece can be connected with the push handle rod or/and the second rotating seat in a relatively up-and-down moving mode, the lower end of the third unlocking piece is matched with a fourth locking piece, and the third locking device can be unlocked by moving the third unlocking piece downwards; preferably, a fourth driving inclined plane is arranged at the lower end of the third unlocking piece, and a corresponding fourth driven inclined plane is arranged on the fourth locking piece; preferably, one end of the third release member extends out of the handle bar.