CN209852399U - Folding mechanism and baby carriage with same - Google Patents

Abstract

The utility model discloses a folding mechanism and a baby carriage provided with the same, the baby carriage comprises a carriage frame, the carriage frame comprises an upper carriage hand, a lower carriage hand, a rear foot and a connecting rod, the lower end of the upper carriage hand can be connected in the lower carriage hand in a relatively up-down sliding manner, the lower end of the lower carriage hand is pivoted with the rear foot, and one end of the connecting rod can be connected with the rear foot in a relatively moving manner; it includes the follower, is used for the restriction to receive the mechanism connecting rod and back foot relative motion's locking device, the follower can set up in the back foot with reciprocating relatively, locking device set up in between back foot and the connecting rod one end, it will receive the receipts the utility model discloses during the perambulator, the relative down handlebar down remove the handlebar up can drive the follower and down remove along the back foot, the follower that down removes can the release lock locking device to it is very convenient to receive the operation of receipts, and light not hard, and because the handlebar up also retracts down in the handlebar, thereby it is small to receive the frame volume after the receipts are closed.

Description

Folding mechanism and baby carriage with same

Technical Field

The utility model relates to an infant product field especially relates to a receive and close mechanism and be equipped with this perambulator that closes mechanism.

Background

The stroller generally includes a frame and a folding mechanism, the folding mechanism is disposed on the frame, and the frame can be switched between an unfolded state and a folded state by operating the folding mechanism. Some stroller folding mechanisms are very laborious to operate and have a large folding volume.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a receive and close mechanism and be equipped with this perambulator that receives and close mechanism, it receives to close the operation easily effortlessly, receives to close moreover that the back volume is little.

In order to achieve the above object, the utility model adopts the following technical scheme:

a folding mechanism is used for a baby carriage, the baby carriage comprises a frame with an unfolding state and a folding state, the frame comprises an upper hand, a lower hand, a rear foot and a connecting rod, the lower end of the upper hand can be connected into the lower hand in a relatively up-down sliding manner, the lower end of the lower hand is pivoted with the rear foot, and one end of the connecting rod can be connected with the rear foot in a relatively moving manner; the folding mechanism comprises a driven piece and a locking device used for limiting the relative motion of the connecting rod and the rear foot, the driven piece is arranged in the rear foot in a relatively up-and-down moving mode, the locking device is arranged between the rear foot and one end of the connecting rod, and the driven piece moves down along the rear foot under the driving of an upper driver moving down relative to a lower driver so as to release the locking device.

The folding mechanism further comprises a second spring which is arranged between the driven piece and the rear foot and used for driving the driven piece to move upwards.

The folding mechanism further comprises a driving piece fixedly connected to the lower end of the upper handle, the lower end of the driving piece is provided with an inclined plane, and correspondingly, the upper end of the driven piece is also provided with a matched inclined plane; preferably, the lower end of the driven part is provided with an inclined surface towards one side of the locking part.

The driven piece comprises an upper driven piece and a lower driven piece arranged on the lower side of the upper driven piece, and the upper driven piece and the lower driven piece can be arranged in the rear leg in a relatively up-down moving mode.

The locking device comprises a locking piece and a first spring, the locking piece is arranged on the lower side of the driven piece, the locking piece is arranged between the rear leg and the connecting rod in a relatively movable manner, correspondingly, the first spring is arranged between the locking piece and the connecting rod, and under the action of the first spring, one end of the locking piece extends into the rear leg, and the other end of the locking piece extends into the connecting rod; or, locking device includes a locking piece and a spring, the locking piece extends from top to bottom and sets up in the back foot, and in the middle of the locking piece with back foot pivot joint, be provided with between lower extreme and the back foot inner wall the spring, upper end one side extension are provided with block portion, correspond, be provided with the perforation on the back foot lateral wall, connecting rod one end is provided with the card hole under the effect of spring, block portion passes the perforation back card of back foot lateral wall and goes into the card of connecting rod downthehole.

The frame further comprises a linkage piece connected to the rear foot in a relatively movable manner, one end of the connecting rod is pivoted to the linkage piece, and the locking device is arranged between the rear foot and the linkage piece; preferably, the linkage member is a T-shaped sliding sleeve, the T-shaped sliding sleeve includes a sleeve portion and a connecting portion extending from the sleeve portion to one side, the sleeve portion is sleeved on the rear leg in a manner of moving up and down relatively, and the connecting portion is pivoted with one end of the connecting rod; the first spring is arranged between the locking piece and the connecting part, and under the action of the first spring, one end of the locking piece extends into the rear leg, and the other end of the locking piece extends into the connecting part of the T-shaped sliding sleeve; or, the sleeve part of the T-shaped sliding sleeve is provided with a clamping hole, and under the action of the spring, the clamping part of the locking piece passes through the through hole on the side wall of the rear leg and then is clamped into the clamping hole of the sleeve part.

The connecting pipe is fixedly arranged in the rear foot, the lower end of the driven piece is connected in the connecting pipe in a relatively up-down moving mode, the sleeve part of the T-shaped sliding sleeve is sleeved on the connecting pipe, an avoidance hole extending up and down is formed in the side wall of the rear foot, facing one side of the connecting rod, the connecting part of the T-shaped sliding sleeve penetrates through the avoidance hole and then is connected with one end of the connecting rod, one end of the locking piece extends into the connecting pipe, and the other end of the locking piece extends into the connecting part of the T-shaped sliding; or, the locking piece is pivoted in the connecting pipe, the spring is arranged between the lower end of the locking piece and the inner wall of the connecting pipe, the through hole is formed in the side wall of the connecting pipe, and the clamping part of the locking piece penetrates through the through hole in the side wall of the connecting pipe and then is clamped into the clamping hole in the sleeve part under the action of the spring.

A baby carriage comprises a carriage frame and the folding mechanism, wherein the carriage frame comprises an upper carriage hand, a lower carriage hand, a rear foot and a connecting rod, and a locking device of the folding mechanism is arranged between the rear foot and the connecting rod.

The frame further comprises a front foot, the connecting rod comprises a first connecting rod and a second connecting rod, the upper end of the first connecting rod is pivoted to the lower handle, the front end of the second connecting rod is pivoted to the front foot, the lower end of the first connecting rod and the rear end of the second connecting rod are pivoted to the rear foot together in a manner of moving up and down relatively, the lower handle, the rear foot and the connecting rod are connected, and a locking device of the folding mechanism is arranged between the rear foot and the lower end of the first connecting rod or/and the rear end of the second connecting rod.

The frame includes the left and right sides support, and each collateral branch frame all includes go up the car hand, lower car hand, back foot, connecting rod and preceding foot, each all be provided with on the collateral branch frame locking device's follower and locking device, the frame still includes a horizontal pipe, both ends are connected with the connecting portion of the T shape sliding sleeve on the back foot of the left and right sides support respectively about the horizontal pipe, the lower extreme of first connecting rod and the rear end pin joint of second connecting rod in on the connecting portion or the horizontal pipe of T shape sliding sleeve.

Compared with the prior art, the utility model, following beneficial effect has:

when the frame is folded, the upper driver is moved downwards to a certain distance, so that the driven piece can be driven to move downwards along the rear leg, and the lock locking mechanism can be released when the driven piece moves downwards, so that the frame can be folded, and the folding operation is easy and effortless; and the upper driver moves downwards along the lower driver, so that the overall height of the folded frame is reduced, and the folded volume is small.

Drawings

Fig. 1 is a schematic plan view of the stroller of the present invention in an unfolded state;

fig. 2 is a schematic perspective view of the stroller of the present invention in an unfolded state;

fig. 3 is a schematic perspective view of a folding mechanism for a stroller of the present invention;

FIG. 4 is an enlarged cross-sectional view taken along section A of FIG. 3;

FIG. 5 is an enlarged view of the portion B of FIG. 4;

FIG. 6 is an enlarged perspective view of the assembly according to section A of FIG. 3 with the frame locked in the extended condition;

FIG. 7 is an enlarged plan view of the assembly according to section A of FIG. 3 with the frame locked in the extended condition;

FIG. 8 is an enlarged perspective view of the folding mechanism with the frame unlocked;

FIG. 9 is an enlarged plan view of the folding mechanism with the frame unlocked;

fig. 10 is a schematic perspective view of the stroller of the present invention during the folding process;

fig. 11 is a schematic plan view of the stroller of the present invention in a folding process;

fig. 12 is a perspective view of the stroller of the present invention in a folded state;

fig. 13 is a schematic plan view of the stroller of the present invention in a folded state;

fig. 14 is an enlarged cross-sectional view of another embodiment of the locking device of the folding mechanism of the stroller of the present invention.

Detailed Description

As shown in fig. 1 to 4, the folding mechanism of the present invention is used for a stroller, the stroller comprises a frame, the frame comprises an upper handle 1, a lower handle 2, a rear leg 3 and a connecting rod 4, the lower end of the upper handle 1 is slidably connected to the lower handle 2 up and down, the lower end of the lower handle 2 is pivotally connected to the rear leg 3, and one end of the connecting rod 4 is movably connected to the rear leg 2; the folding mechanism comprises a driven part 5 and a locking device 6 for limiting the relative movement of the connecting rod 4 and the rear foot 3, the driven part 5 is arranged in the rear foot 3 in a relatively up-and-down moving mode, the locking device 6 is arranged between the rear foot 3 and one end of the connecting rod 4, and the driven part 5 moves downwards along the rear foot 3 under the driving of an upper vehicle hand 1 moving downwards relative to a lower vehicle hand 2 to release the locking device 6.

Referring to fig. 5 to 9, in the present embodiment, the locking device 6 includes a locking member 61 and a first spring 62, the locking member 61 is disposed at a lower side of the driven member 5, the locking member 61 is disposed between the rear leg 3 and the connecting rod 4 in a relatively movable manner, the first spring 62 is disposed between the locking member 61 and the connecting rod 4, under the action of the first spring 62, one end of the locking member 61 extends into the rear leg 3, and the other end extends into the connecting rod 4, at this time, the locking device 6 is in a locked state, and the connecting rod 4 cannot move up and down relative to the rear leg 3.

Preferably, the retracting mechanism further comprises a second spring (not shown) disposed between the driven member 5 and the rear leg 3 for driving the driven member 5 to move upward, so that the driven member 5 can automatically return when the driven member 5 is no longer pressed by the lower end of the rider 1. In this embodiment, the follower 5 is provided with a long slot 51, a pivot (not shown) passes through the long slot 51 and is connected to the rear leg 3, the second spring is disposed in the long slot 51, and an upper end of the second spring abuts against an upper end surface of the long slot, and a lower end of the second spring abuts against the pivot, so that the second spring constantly keeps a tendency of driving the follower 5 to move upward, and the purpose of relatively moving up and down and connecting the follower 5 and the rear leg 3 is achieved through the pivot.

Preferably, the folding mechanism further includes a driving member 7 fixedly connected to the lower end of the upper handle 1, the lower end of the driving member 7 is provided with an inclined surface 71, and correspondingly, the upper end of the driven member 5 is also provided with an inclined surface 50 matched with the inclined surface 71, so that when the upper handle 1 moves down to a certain position, the driven member 5 can be more smoothly pushed to move down along the rear leg 3 by the cooperation of the inclined surface at the lower end of the driving member 7 and the inclined surface 50 at the upper end of the driven member 5.

Preferably, the side of the lower end of the follower 5 facing the locking member 61 is also provided with a slope 54, so as to better drive the locking member 61 to move and release the locking mechanism.

In this embodiment, the follower 5 preferably includes an upper follower 55 and a lower follower 56 disposed below the upper follower 55, and both the upper follower 55 and the lower follower 56 are disposed in the rear leg 3 to move up and down relatively. By such a segmented arrangement, neither upper follower 55 nor lower follower 56 need be too long, thereby increasing the overall strength of follower 5 and making it less likely to break. The inclined surface 50 is arranged at the upper end of the upper driven member 55, and the inclined surface 54 is arranged at the lower end of the lower driven member 56. Preferably, the second spring is disposed between the lower follower 56 and the rear leg 3. Correspondingly, the upper follower 55 is provided with a long groove 52, and the upper follower 55 is connected with the rear leg after penetrating through the long groove 52 through a pivot, so that the upper follower 55 is connected with the rear leg 3 in a relatively up-and-down moving manner.

The frame further comprises a linkage piece 8 connected to the rear leg 3 in a relatively movable manner, one end of the connecting rod 4 is pivoted to the linkage piece 8, and the locking device 6 is arranged between the rear leg 3 and the linkage piece 8. So that the linkage 8 cannot move relative to the rear foot 3, i.e. the connecting rod 4 cannot move relative to the rear foot 3, when the locking device 6 is in the locked state.

In this embodiment, preferably, the linkage member 8 is configured as a T-shaped sliding sleeve, the T-shaped sliding sleeve includes a sleeve portion 81 and a connecting portion 82 extending from the sleeve portion 81 to one side, the sleeve portion 81 is sleeved on the rear leg 3 to move up and down relatively, the connecting portion 82 is connected to one end of the connecting rod 4, the locking member 61 is disposed between the T-shaped sliding sleeve 8 and the rear leg 3 to move relatively, the first spring 62 is disposed between the locking member 61 and the connecting portion 82, under the action of the first spring 62, one end of the locking member 61 extends into the rear leg 3, the other end extends into the connecting portion 82 of the T-shaped sliding sleeve, and the locking mechanism 6 is in a locked state, so that the T-shaped sliding sleeve 8 cannot move up and down relative to the rear leg 3, and the connecting rod 4 connected to the connecting portion 82 of the T-shaped sliding sleeve cannot move up and down relative.

In this embodiment, the rear leg 3 is internally and fixedly provided with a connecting pipe 31, the lower end of the driven member 5 is connected to the connecting pipe 31 in a manner of moving up and down relatively (specifically, the lower end of the lower driven member 56 is connected to the connecting pipe 31 in a manner of moving up and down relatively), the sleeve portion 81 of the T-shaped sliding sleeve 8 is sleeved on the connecting pipe 31, the rear leg 3 is provided with an avoidance hole (not shown) extending up and down on the side wall facing one side of the connecting rod 4, the connecting portion 82 of the T-shaped sliding sleeve 8 passes through the avoidance hole and then is connected with one end of the connecting rod 4, one end of the locking member 61 extends into the connecting pipe 31, and the other end extends into the connecting. The connecting pipe 31 is arranged in the rear leg 3, so that the overall strength of the rear leg 3 can be increased. The avoidance hole is formed so that the rear leg 3 does not interfere with the up-and-down movement of the connecting rod 4.

The folding mechanism further comprises a driver locking device arranged between the upper driver 1 and the lower driver 2 and used for limiting the upper driver and the lower driver to slide up and down relatively and a driver unlocking device 11 arranged on the frame and used for unlocking the driver locking device, so that when the upper driver 1 needs to be moved down, the driver unlocking device 11 needs to be operated firstly to unlock the driver locking mechanism, and the upper driver 1 can be moved down after the driver locking mechanism is unlocked. Preferably, the rider unlocking device is arranged on the upper rider 1. The locking device of the driver and the locking device of the driver can be any known and feasible mechanism, and the specific structure is not the main point of the utility model, as long as the function can be realized, which is not repeated herein.

Referring to fig. 10-13, in this embodiment, the link 4 includes a first link 41 and a second link 42, the frame further includes a front leg 10, the upper end of the first link 41 is pivoted to the lower handle 2, the front end of the second link 42 is pivoted to the front leg 10, the lower end of the first link 41 and the rear end of the second link 42 are pivoted to the rear leg 3 together to move up and down relatively, and the locking device 6 is disposed between the rear leg 3 and the lower end of the first link 41 or/and the rear end of the second link 42. That is, the locking device 6 may be provided between the rear leg 3 and the lower end of the first link 41, between the rear leg 3 and the rear end of the second link 42, or between the rear leg 3 and the lower end of the first link 41 and the rear end of the second link 42. Since the lower end of the first link 41 and the rear end of the second link 42 are pivotally connected to the rear leg 3 so as to be movable up and down relative to each other, the locking device 6 can be provided at one end of the rear leg 3 and one end of the link 4, and the positions of the first link 41 and the second link 42 relative to the rear leg 3 can be adjusted as needed, that is, the first link 41 may be located between the rear leg 3 and the second link 42, or the second link 42 may be located between the rear leg 3 and the first link 41.

The frame includes left and right sides support 100 (as shown in fig. 2), and each side support 100 all includes go up the car owner 1, lower car owner 2, rear foot 3, connecting rod 4 and front foot 5, each all be provided with on the side support 100 follower 5 and locking device 6, the frame still includes a horizontal pipe 9, both ends are connected with the connecting portion 82 of the T shape sliding sleeve on the rear foot 3 of left and right sides support 100 respectively about horizontal pipe 9, and the connected mode can be in horizontal pipe 9 inserts connecting portion 82, also can be in connecting portion 82 inserts horizontal pipe 9, the lower extreme of first connecting rod 41 and the rear end of second connecting rod 42 pin joint in on the connecting portion 82 or the horizontal pipe 9 of T shape sliding sleeve. The transverse pipe 9 is arranged, so that the frame is more stable in the unfolding state, and the consistency of the left and right brackets in the folding operation can be ensured.

In this embodiment, one side of the connecting portion 82 away from the rear leg 3 is inserted into the transverse tube 9, the lower end of the first connecting rod 41 is sleeved on the connecting portion 82 of the T-shaped sliding sleeve, the rear end of the second connecting rod 42 is sleeved on the transverse tube 9, a blocking portion 91 is fixedly sleeved on the transverse tube 9, and the blocking portion 91 and the first connecting rod 41 are respectively located at the left end and the right end of the blocking portion 91. The blocking part is fixedly connected to the transverse tube 9 through a connecting piece such as a screw or a rivet, the connecting piece penetrates through the transverse tube 9 up and down, one end of the first spring 62 abuts against the connecting part 82, and the other end of the first spring abuts against one side of the locking piece 61 far away from the rear leg 3. In other embodiments, the lower end of the first link 41 and the rear end of the second link 42 can be pivotally connected to the connecting portion 82 of the T-shaped sliding sleeve or the transverse tube 9 by other means.

The frame further comprises a driver cross rod 12, the driver unlocking device 11 is arranged on the driver cross rod 12, and the locking mechanism of the brackets 11 on the two sides can be unlocked simultaneously by operating the driver unlocking device 11.

The utility model discloses receive the theory of operation that closes the mechanism does:

when one end of the locking piece 61 extends into the rear leg 3 and the other end extends into the connecting part 82 of the T-shaped sliding sleeve, the locking device 6 is in a locking state, the lower end of the first connecting rod 41 and the rear end of the second connecting rod 42 cannot move downwards relative to the rear leg 3, and therefore the frame is locked in a unfolding state;

when the baby carriage is to be folded, the locking device of the handle is operated to enable the locking mechanism of the handle to release the lock, then the upper handle 1 is moved downwards, after the handle moves to a certain distance, the lower end of the driving piece 7 at the lower end of the upper handle 1 is contacted with the upper end of the driven piece 5, the upper handle 1 is continuously moved downwards, under the interaction of the inclined plane at the lower end of the driving piece 7 and the inclined plane at the upper end of the driven piece 5, the driven piece 5 is pushed by the driving piece 7 to move downwards along the extending direction of the rear leg 3, so that the lower end of the driven piece 5 pushes the locking piece 61 to move towards the connecting part 82 of the T-shaped sliding sleeve, after the locking piece 61 is completely separated from the connecting pipe 31, the locking device 6 is unlocked, the T-shaped sliding sleeve can move. Specifically, the upper handle 1 is rotated backward and downward to drive the lower handle 2 to rotate backward and downward together, so that the first link 41 moves downward to force the T-shaped sliding sleeve to move downward along the connecting pipe 31, the rear end of the second link 42 is driven to move downward together, the front end of the second link 42 pulls the front leg 10 to rotate backward together (as shown in fig. 10 and 11), until the lower handle 2, the front leg 10, the rear leg 3, the first link 41 and the second link 42 relatively rotate to approach each other, and the upper handle 1 is locked into the lower handle 2, the frame is folded (as shown in fig. 12 and 13), so that the folded frame is small in volume and convenient to store and transport.

The lower end of the lower handle-bar 2 is pivoted to the rear leg 3 through a first pivot 20, the upper end of the first link 41 is pivoted to the lower handle-bar 2 through a second pivot 410, and the first pivot 20 is located below the second pivot 410, so that when the upper handle-bar 1 and the lower handle-bar 2 are rotated backwards, the first link 41 can push the transverse tube 9 downwards more easily, and the folding of the whole frame is more labor-saving.

As shown in fig. 14, in another embodiment, the locking device 6 'may include a locking member 61' and a spring 62 ', the locking member 61' is disposed in the rear leg 3 in an up-and-down extending manner, the middle of the locking member 61 'is pivotally connected to the rear leg 3, the spring 62' is disposed between the lower end of the locking member 61 'and the inner wall of the rear leg 3, and a locking portion 611' is disposed on one side of the upper end of the spring, correspondingly, a through hole (not shown) is disposed on the sidewall of the rear leg 3, and a locking hole 810 'is disposed at one end of the link 4, so that the locking member 611' passes through the through hole of the sidewall of the rear leg 3 and then is locked into the locking hole 810 'of the link 4 under the action of the spring 62', so that the link 4 cannot move up and down relative to the rear leg 3, and the locking device 6 is in a locked state. When the follower 5 is driven to move downwards, the lower end of the follower contacts with the lower side of the locking member 61 ', so that the lower side of the locking member 61' rotates towards one side of the spring 62 ', according to the seesaw principle, the clamping part 611' at the upper end of the locking member 61 'moves towards the direction far away from the connecting rod 4 to be separated from the clamping hole 810' of the connecting rod 4, the locking device 6 releases the lock, and at the moment, the rear end of the connecting rod 4 can move up and down relative to the rear leg 3.

When the connecting rod 4 includes the first connecting rod 41 and the second connecting rod 42, the connecting rod 4 is provided with a blocking hole 810 ', that is, the blocking hole 810 ' may be disposed at the lower end of the first connecting rod 41, or at the rear end of the second connecting rod 42, or both the lower end of the first connecting rod 41 and the rear end of the second connecting rod 42 are provided with the blocking hole 810 '.

When the lower end of the first link 41 and the rear end of the second link 42 are connected to the connecting portion 82 of the T-shaped sliding sleeve, the through hole is formed in the side wall of the rear foot 3, the sleeve portion 81 of the T-shaped sliding sleeve 8 is provided with the locking hole 810 ', and under the action of the spring 62 ', the engaging portion 611 ' of the locking member 61 ' passes through the through hole in the side wall of the rear foot 3 and then is locked into the locking hole 810 ' of the sleeve portion 81.

When the connecting tube 31 is disposed in the rear leg 3, the locking member 61 ' is pivotally connected to the connecting tube 31, the spring 62 ' is disposed between the lower end of the locking member 61 ' and the inner wall of the connecting tube 31, the sidewall of the connecting tube 31 is provided with the through hole, and under the action of the spring 62 ', the engaging portion 611 ' of the locking member 61 ' passes through the through hole in the sidewall of the connecting tube 31 and then is engaged with the engaging hole 810 ' of the sleeve portion 81, so that the connecting rod 4 cannot move up and down relative to the connecting tube 31, the locking device 6 is in a locked state, and the frame is locked in an unfolded state.

Preferably, a side of the lower end of the follower 5 facing the locking member 61 'is provided with a slope 57, so that the follower 5 and the locking member 61' can be smoothly engaged.

Claims (10)

1. A folding mechanism for a baby carriage, the baby carriage comprising a frame having an unfolded state and a folded state, characterized in that: the frame comprises an upper handle, a lower handle, a rear foot and a connecting rod, wherein the lower end of the upper handle is connected into the lower handle in a relatively up-down sliding manner, the lower end of the lower handle is pivoted to the rear foot, and one end of the connecting rod is connected with the rear foot in a relatively moving manner; the folding mechanism comprises a driven piece and a locking device used for limiting the relative motion of the connecting rod and the rear foot, the driven piece is arranged in the rear foot in a relatively up-and-down moving mode, the locking device is arranged between the rear foot and one end of the connecting rod, and the driven piece moves down along the rear foot under the driving of an upper driver moving down relative to a lower driver so as to release the locking device.

2. The folding mechanism of claim 1, wherein: the second spring is arranged between the driven piece and the rear foot and used for driving the driven piece to move upwards.

3. The folding mechanism of claim 2, wherein: the automobile driver is characterized by further comprising a driving piece fixedly connected to the lower end of the upper handle, the lower end of the driving piece is arranged to be an inclined plane, correspondingly, and the upper end of the driven piece is also arranged to be a matched inclined plane.

4. The folding mechanism of claim 3, wherein: the driven piece comprises an upper driven piece and a lower driven piece arranged on the lower side of the upper driven piece, and the upper driven piece and the lower driven piece can be arranged in the rear leg in a relatively up-down moving mode.

5. The folding mechanism according to claim 1, 2, 3 or 4, wherein: the locking device comprises a locking piece and a first spring, the locking piece is arranged on the lower side of the driven piece, the locking piece is arranged between the rear leg and the connecting rod in a relatively movable manner, correspondingly, the first spring is arranged between the locking piece and the connecting rod, and under the action of the first spring, one end of the locking piece extends into the rear leg, and the other end of the locking piece extends into the connecting rod; or, locking device includes a locking piece and a spring, the locking piece extends from top to bottom and sets up in the back foot, and in the middle of the locking piece with back foot pivot joint, be provided with between lower extreme and the back foot inner wall the spring, upper end one side extension are provided with block portion, correspond, be provided with the perforation on the back foot lateral wall, connecting rod one end is provided with the card hole under the effect of spring, block portion passes the perforation back card of back foot lateral wall and goes into the card of connecting rod downthehole.

6. The folding mechanism of claim 5, wherein: the frame further comprises a linkage piece connected to the rear foot in a relatively movable manner, one end of the connecting rod is pivoted to the linkage piece, and the locking device is arranged between the rear foot and the linkage piece; preferably, the linkage member is a T-shaped sliding sleeve, the T-shaped sliding sleeve includes a sleeve portion and a connecting portion extending from the sleeve portion to one side, the sleeve portion is sleeved on the rear leg in a manner of moving up and down relatively, and the connecting portion is pivoted with one end of the connecting rod; the first spring is arranged between the locking piece and the connecting part, and under the action of the first spring, one end of the locking piece extends into the rear leg, and the other end of the locking piece extends into the connecting part of the T-shaped sliding sleeve; or, the sleeve part of the T-shaped sliding sleeve is provided with a clamping hole, and under the action of the spring, the clamping part of the locking piece passes through the through hole on the side wall of the rear leg and then is clamped into the clamping hole of the sleeve part.

7. The folding mechanism of claim 6, wherein: the connecting pipe is fixedly arranged in the rear foot, the lower end of the driven piece is connected in the connecting pipe in a relatively up-down moving mode, the sleeve part of the T-shaped sliding sleeve is sleeved on the connecting pipe, an avoidance hole extending up and down is formed in the side wall of the rear foot, facing one side of the connecting rod, the connecting part of the T-shaped sliding sleeve penetrates through the avoidance hole and then is connected with one end of the connecting rod, one end of the locking piece extends into the connecting pipe, and the other end of the locking piece extends into the connecting part of the T-shaped sliding; or, the locking piece is pivoted in the connecting pipe, the spring is arranged between the lower end of the locking piece and the inner wall of the connecting pipe, the through hole is formed in the side wall of the connecting pipe, and the clamping part of the locking piece penetrates through the through hole in the side wall of the connecting pipe and then is clamped into the clamping hole in the sleeve part under the action of the spring.

8. A stroller, characterized in that: the folding mechanism comprises a frame and a folding mechanism according to any one of claims 1 to 7, wherein the frame comprises an upper driver, a lower driver, a rear leg and a connecting rod, and a locking device of the folding mechanism is arranged between the rear leg and the connecting rod.

9. The stroller of claim 8, wherein: the frame further comprises a front foot, the connecting rod comprises a first connecting rod and a second connecting rod, the upper end of the first connecting rod is pivoted to the lower handle, the front end of the second connecting rod is pivoted to the front foot, the lower end of the first connecting rod and the rear end of the second connecting rod are pivoted to the rear foot together in a manner of moving up and down relatively, the lower handle, the rear foot and the connecting rod are connected, and a locking device of the folding mechanism is arranged between the rear foot and the lower end of the first connecting rod or/and the rear end of the second connecting rod.

10. The stroller of claim 9, wherein: the frame includes the left and right sides support, and each collateral branch frame all includes go up the car hand, lower car hand, back foot, connecting rod and preceding foot, each all be provided with on the collateral branch frame locking device's follower and locking device, the frame still includes a horizontal pipe, both ends are connected with the connecting portion of the T shape sliding sleeve on the back foot of the left and right sides support respectively about the horizontal pipe, the lower extreme of first connecting rod and the rear end pin joint of second connecting rod in on the connecting portion or the horizontal pipe of T shape sliding sleeve.