CN116714657A

CN116714657A - Child cart

Info

Publication number: CN116714657A
Application number: CN202310757814.9A
Authority: CN
Inventors: 吴立; 林文壮; 李富刚; 郑胜利
Original assignee: Zhongshan Baosheng Infant And Children Supplies Co ltd
Current assignee: Zhongshan Baosheng Infant And Children Supplies Co ltd
Priority date: 2023-06-25
Filing date: 2023-06-25
Publication date: 2023-09-08

Abstract

The invention discloses a baby carriage, which is provided with a foldable bottom support frame, wherein the bottom support frame comprises a front leg with a front wheel and a rear leg with a rear wheel, the front leg is rotatably connected with the rear leg, the upper part of the bottom support frame is rotatably connected with a connecting seat, and the connecting seat is rotatably connected with a push rod component; the connecting seat is also connected with a foldable seat component which can rotate along with the connecting seat relative to the bottom supporting frame to switch the forward mode and the backward mode, the seat component comprises a seat part, a handrail part and a backrest part, a fourth locking component is arranged between the backrest part and the seat part, a backrest unlocking piece for unlocking the fourth locking component is arranged on the backrest part, a fifth locking component is arranged between the handrail part and the seat part, and a sixth locking component is arranged between the seat part and the connecting seat. The invention aims to overcome the defects of the prior art and provides the child cart which is convenient to unlock and simple in folding operation.

Description

Child cart

[ field of technology ]

The invention relates to the field of children's vehicles, in particular to a child stroller.

[ background Art ]

The baby carriage has become an indispensable product in the growth process of infants. Many of the current commercial child strollers include a folding child stroller frame and a seat assembly attached to the child stroller frame.

In the folding process of the child stroller at the present stage, the backrest part of the seat assembly is usually operated to unlock, the backrest part rotates towards the direction of the seat part to link the unlocking of the seat part, then the whole seat frame rotates towards the front leg direction to be closed, and then the seat frame rotates towards the rear leg direction to be closed to link the child stroller frame to release the lock, so that the child stroller frame is folded; however, the center of gravity of the stroller is basically located between the front leg and the rear leg, when the stroller is folded, if the seat assembly is folded toward the front leg and the push rod is folded toward the rear leg, most of the weight of the stroller is concentrated on the front leg or is close to the front leg, the front leg and the seat assembly cannot be automatically folded relative to the rear leg, and the whole folding of the stroller can be completed only by manual operation of a large number of people, so that the folding operation is not very convenient.

The present invention has been made in view of the above problems.

[ invention ]

The invention aims to overcome the defects of the prior art and provides the child cart which is convenient to unlock and simple in folding operation.

The invention is realized by the following technical scheme:

a stroller having a foldable bottom support frame 1, wherein the bottom support frame 1 comprises a front leg 11 with a front wheel 111 and a rear leg 12 with a rear wheel 121, the front leg 11 is rotatably connected with the rear leg 12, a connecting seat 2 is rotatably connected with the upper part of the bottom support frame 1, and a push rod assembly 3 is rotatably connected with the connecting seat 2;

a first locking component 51 capable of locking the front leg 11 and the rear leg 12 relatively is arranged between the upper ends of the two, a second locking component 52 capable of locking the two relatively is arranged between the push rod component 3 and the connecting seat 2, and a first unlocking component 53 for correspondingly unlocking the first locking component 51 and the second locking component 52 in a linkage manner is arranged on the connecting seat 2;

the connecting seat 2 is further connected with a foldable seat assembly 4 capable of rotating relative to the bottom support frame 1 along with the connecting seat 2 to switch a forward mode and a backward mode, the seat assembly 4 comprises a seat part 41, an armrest part 42 and a backrest part 43, a fourth locking assembly 56 for locking the backrest part 43 relative to the seat part 41 is arranged between the backrest part 43 and the seat part 41, a backrest unlocking piece 564 for unlocking the fourth locking assembly 56 is arranged on the backrest part 43, a fifth locking assembly 57 for locking the armrest part 42 relative to the seat part 41 is arranged between the armrest part 42 and the seat part 41, and a sixth locking assembly 58 for locking the seat part 41 relative to the connecting seat 2 is arranged between the seat part 41 and the connecting seat 2;

when the seat assembly 4 is in the backward mode, the fourth locking assembly 56 is released to close the backrest 43 to the seat 41 and fold to a preset angle, the fifth locking assembly 57 is linked to release the lock to rotate the armrest 42 to close the seat 41 and fold, and the armrest 42 is rotated to close the seat 41 to a preset angle and linked to release the lock to release the sixth locking assembly 58 to rotate the seat 41 to fold relative to the connecting seat 2 towards the rear leg 12; when the seat portion 41 is rotated and folded towards the rear leg 12 relative to the connecting seat 2, the seat portion 41 is linked with the first unlocking component 53 to unlock the first locking component 51 and the second locking component 52 correspondingly, and accordingly the push rod component 3 is rotated relative to the connecting seat 2 to be close to and folded towards the rear leg 12, and when the push rod component 3 is rotated to a preset angle, the push rod component 3 is linked with the front leg 11 again to be close to and folded towards the rear leg 12.

A linkage assembly 6 which is rotated and folded to a preset angle towards the rear leg 12 relative to the connecting seat 2 at the push rod assembly 3 and is arranged between the push rod assembly 3 and the front leg 11 so that the push rod assembly 3 and the front leg 11 synchronously draw close and fold towards the rear leg 12.

The push rod assembly 3 is provided with a second unlocking assembly 54 capable of unlocking the second locking assembly 52, a third locking assembly 55 capable of locking the bottom support frame 1 and the connecting seat 2 relatively and preventing the connecting seat 2 and the seat assembly 4 from rotating and reversing relatively to the bottom support frame 1 is arranged between the bottom support frame 1 and the connecting seat 2, and when the second locking assembly 52 is unlocked, the push rod assembly 3 can rotate upwards to a preset angle relatively to unlock the third locking assembly 55.

The rear leg 12 comprises a mounting seat 122 and a rear leg rod 123 connected to the mounting seat 122, the rear wheel 121 is connected to the rear leg rod 123, the front leg 11 is rotatably connected to the mounting seat 122, the connecting seat 2 is rotatably connected to the mounting seat 122, the linkage assembly 6 comprises a sliding piece 61 slidably connected to the mounting seat 122, a driven tooth 611 is arranged at the rear end of the sliding piece 61, a linkage piece 62 capable of rotating relative to the front leg 12 is pivoted between the front end of the sliding piece 61 and the front leg 12, a rotating piece 63 is connected to the push rod assembly 3 in a same manner as the connecting seat 2, and a driving tooth 64 capable of being meshed with the driven tooth 611 when the rotating piece 63 rotates to a preset angle is arranged on the rotating piece 63, so that the push rod assembly 3 and the front leg 11 can be synchronously folded towards the rear leg 12.

The push rod assembly 3 comprises a rotating seat 31 rotatably connected to the connecting seat 2, two rotating rods 32 connected to the rotating seat 31 in a co-rotating manner are connected to the rotating seat 31, a supporting rod 33 is further connected to the rotating seat 31, a push rod 34 is connected to the supporting rod 33, the second locking assembly 52 comprises a left connecting shell 521 and a right connecting shell 522 which are respectively arranged on the connecting seat 2, a containing space and a spline groove 523 are formed between the left connecting shell 521 and the rotating seat 31 and between the right connecting shell 522 and the rotating seat 31, a spline 524 for being clamped with the spline groove 523 is movably arranged in the containing space, a spline reset piece 525 is further arranged between the spline 524 and the rotating seat 31, the first unlocking assembly 53 comprises a sliding block 531 which is connected to the connecting seat 2 in a sliding manner, a convex lug 5311 is arranged on the side surface of the sliding block 531, a groove 5241 matched with the lug 5311 is correspondingly arranged on the side surface of the sliding block 531, a first inclined surface 5312 is arranged on the sliding block 5311, and a spline groove 533 is movably arranged between the sliding block 53 and the corresponding sliding block 53, and the sliding block 53 can be separated from the sliding block 53 by the corresponding spline groove 53, and the sliding block 53 can be connected to the sliding block 53 by the corresponding spline groove 531, and the sliding block 53 on the sliding block 53.

The rear leg 12 includes a mounting seat 122 and a rear leg rod 123 connected to the mounting seat 122, the upper portion of the front leg 11 is rotatably connected to the mounting seat 122, the connecting seat 2 is rotatably connected to the mounting seat 122, the first locking assembly 51 includes a locking pin 511 disposed on the upper portion of the front leg 11 and a hook 512 rotatably disposed on the mounting seat 122 and used for being in locking engagement with the locking pin 511, a hook elastic member 513 capable of pushing the hook 512 to reset is disposed between the hook 512 and the mounting seat 122 so that the hook 512 is kept locked on the locking pin 511, and the first unlocking assembly 53 further includes a pushing block 534 slidably connected in the mounting seat 122 and capable of pushing the hook 512 to rotate and separate from the locking pin 511 when the sliding block 531 slides downward.

The rear leg 12 comprises a mounting seat 122 and a rear leg rod 123 connected to the mounting seat 122, the upper part of the front leg 11 is rotatably connected to the mounting seat 122, the connecting seat 2 is rotatably connected to the mounting seat 122, the push rod assembly 3 comprises a rotating rod 32 which can relatively rotatably penetrate through a rotating shaft sleeve 555 in the transverse direction, the third locking assembly 55 comprises a sleeve 554, the rotating shaft sleeve 555 and a locking piece 553, the sleeve 554 is relatively fixedly arranged on the mounting seat 122, the rotating shaft sleeve 555 is rotatably connected with the sleeve 554, the connecting seat 2 is rotatably connected to the mounting seat 122 through the rotating shaft sleeve 555, a first locking groove 551 is axially formed on the front side surface of the sleeve 554, the locking piece 553 is arranged in the rotating shaft sleeve 555 and is in synchronous connection with the rotating rod 32, an avoidance through groove 556 is axially formed on the front side and the rear side of the rotating shaft sleeve 555, and the rear side surface of the sleeve 554 forms a limiting blocking wall 557 so that the locking piece 553 can only tilt in the backward 12 direction; when the push rod assembly 3 is turned upwards to a preset angle, the locking piece 553 is separated from the first locking groove 551 along with the rotation of the rotating rod 32, the connecting seat 2 and the mounting seat 122 are unlocked, and the seat assembly 4 can be rotated and reversed along with the connecting seat 2.

The rear side of the sleeve 554 is provided with a second locking groove 552 along the axial direction, the depth of the second locking groove 552 is smaller than that of the first locking groove 551, and a limiting blocking wall is formed at the bottom of the second locking groove 552 to limit the lower portion of the locking piece 553 from extending out of the rear side of the sleeve 554, so that the locking piece 553 can only rotate and tilt towards the rear leg 12.

The second unlocking assembly 54 includes a first unlocking member 541 disposed on the hand push rod 34, and the second unlocking assembly 54 further includes a pull rod 542 connected to the spline 524 for driving the spline 524 to be separated from the spline grooves 523 on the left connecting shell 521 and the right connecting shell 522, where a pulling member 543 is connected to an end of the pull rod 542, and a push rod unlocking linkage member 544 is disposed between the pulling member 543 and the first unlocking member 541.

The fourth locking assembly 56 includes an adjusting clamping position 561 disposed on the seat portion 41, a latch 562 movably inserted into the adjusting clamping position 561 is disposed on the back portion 43, an elastic pushing latch 562 is disposed on the back portion 43 to be clamped into a back adjusting locking elastic member 563 of the corresponding adjusting clamping position 561, and a back unlocking linkage 565 capable of driving the latch 562 to slide is disposed between the back unlocking member 564 and the latch 562.

The fifth locking assembly 57 includes a handrail locking hole 571 provided on the armrest portion 42, the seat portion 41 is provided with a handrail locking member 572 movably inserted into the handrail locking hole 571, one end of the handrail locking member 572 is provided with a propping portion 573 capable of extending into the backrest portion 43, the backrest portion 43 is further provided with a handrail linkage unlocking portion 574, when the backrest portion 43 rotates to a preset angle relative to the seat portion 41, the handrail linkage unlocking portion 574 pushes the propping portion 573 to disengage the handrail locking member 572 from the handrail locking hole 571 for releasing locking, and a handrail locking elastic member 575 is provided between the handrail locking member 572 and the seat portion 41 to enable the handrail locking member 572 to be clamped into the handrail locking hole 571.

The sixth locking assembly 58 includes a seat locking hole 581 provided in the connecting seat 2, a seat locking pin 582 movably inserted into the seat locking hole 581 is provided at the bottom of the seat portion 41, a seat unlocking link 583 for linking the seat locking pin 582 to move out of the seat locking hole 581 when the armrest locking member 572 is moved out of the armrest locking hole 571 is provided between the seat locking pin 582 and the armrest locking member 572, and a seat locking elastic member 584 for elastically pressing the seat locking pin 582 to be extended is provided between the seat locking pin 582 and the seat portion 41.

The rear leg 12 comprises a mounting seat 122 and a rear leg rod 123 connected to the mounting seat 122, the front leg 11 is rotatably connected to the mounting seat 122, the connecting seat 2 is rotatably connected to the mounting seat 122, and a torsion spring 7 which automatically closes and folds the front leg 11 to the rear leg 12 after the front leg 11 is unlocked is arranged between the front leg 11 and the mounting seat 122.

Compared with the prior art, the invention has the following advantages:

1. when the child stroller needs to be folded, the seat assembly is adjusted to a backward mode, then the fourth locking assembly is unlocked through the backrest unlocking piece, the backrest is pushed to rotate towards the seat portion to be close, in the process that the backrest rotates towards the seat portion to be close, the backrest unlocks the fifth locking assembly, the armrest part rotates towards the seat portion under the dead weight, the armrest part unlocks the sixth locking assembly in the process that the backrest rotates towards the seat portion to be close, at the moment, the seat portion can rotate relative to the connecting seat to rotate towards the rear legs, and when the seat assembly rotates towards the rear legs, the seat part pushes the unlocking assembly to enable the second locking assembly and the first locking assembly to unlock the push rod assembly to rotate relative to the connecting seat and towards the rear legs, at the moment, the front legs also rotate towards the rear legs.

2. The driving assembly enables the push rod assembly to drive the front legs to rotate towards the rear legs to be close when the push rod assembly rotates for a certain angle, at the moment, the whole baby stroller does not need to be held when the whole baby stroller is folded, the rear legs and the push rod assembly can enable the baby stroller to stand, and a person only needs to operate to push the backrest to rotate towards the seat to be close, so that the folding of the whole baby stroller can be completed.

[ description of the drawings ]

FIG. 1 is a perspective view of a child stroller of the present invention;

FIG. 2 is a side view of the child stroller of the present invention;

FIG. 3 is a view of the push rod of the stroller of the present invention in an upright position;

FIG. 4 is a state diagram of the stroller seat assembly, mount and push rod assembly of the present invention in reverse;

FIG. 5 is a perspective view of the stroller seat assembly, mount and push rod assembly of the present invention with the push rod assembly reversed;

FIG. 6 is a state diagram of the stroller seat assembly, mount and push rod assembly of the present invention with the reversing completed;

FIG. 7 is a perspective view of the drive assembly of the child stroller of the present invention;

FIG. 8 is a cross-sectional view of the third locking assembly of the stroller of the present invention in an original state;

FIG. 9 is a cross-sectional view of the third locking assembly of the stroller with the push rod assembly in an upright position;

FIG. 10 is a cross-sectional view of the third locking assembly of the stroller with the push rod assembly in an upright position and with the stroller seat assembly, mount and push rod assembly reversed;

FIG. 11 is a cross-sectional view of the third locking assembly of the child stroller with the push rod assembly in an upright position and the stroller seat assembly, mount and push rod assembly completing the commutation;

FIG. 12 is one of the exploded views of the second locking assembly and the second unlocking assembly of the child stroller of the present invention;

FIG. 13 is a second exploded view of the second locking assembly and second unlocking assembly of the child stroller of the present invention;

FIG. 14 is an exploded view of the second locking assembly, the second unlocking assembly, and the first locking assembly of the child stroller of the present invention;

FIG. 15 is a perspective view of a spline and slider in the stroller of the present invention;

FIG. 16 is one of the exploded views of the spline and slide block of the child stroller of the present invention;

FIG. 17 is a second exploded view of the spline and slide block of the stroller of the present invention;

FIG. 18 is a perspective view of the drive assembly of the child stroller of the present invention;

FIG. 19 is a state diagram of the drive assembly of the child stroller with the front legs folded;

FIG. 20 is one of the exploded views of the fourth, fifth and sixth locking assemblies of the stroller of the present invention;

FIG. 21 is a second exploded view of the fourth, fifth and sixth locking assemblies of the stroller of the present invention;

FIG. 22 is a third exploded view of the fourth, fifth and sixth locking assemblies of the stroller of the present invention;

fig. 23 is an exploded view of a seventh locking arrangement in the stroller of the present invention.

[ detailed description ] of the invention

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

as shown in fig. 1 to 23, the present invention provides a stroller having a foldable bottom support frame 1, wherein the bottom support frame 1 comprises a front leg 11 having a front wheel 111 and a rear leg 12 having a rear wheel 121, the front leg 11 is rotatably connected with the rear leg 12 about a first axis a, a connection base 2 is rotatably connected to an upper portion of the bottom support frame 1, and a push rod assembly 3 is rotatably connected to the connection base 2 about a second axis B;

the connecting seat 2 is further connected with a foldable seat assembly 4 capable of rotating relative to the bottom support frame 1 along with the connecting seat 2 to switch a forward mode and a backward mode, the seat assembly 4 comprises a seat part 41, a handle part 42 and a backrest part 43 which are rotatably connected to the connecting seat 2 around a third axis C, a fourth locking assembly 56 for locking the backrest part 43 relative to the seat part 41 is arranged between the backrest part 43 and the seat part 41, a backrest unlocking part 564 for unlocking the fourth locking assembly 56 is arranged on the backrest part 43, a fifth locking assembly 57 for locking the handle part 42 relative to the seat part 41 is arranged between the handle part 42 and the seat part 41, and a sixth locking assembly 58 for locking the seat part 41 relative to the connecting seat 2 is arranged between the seat part 41 and the connecting seat 2;

when the seat assembly 4 is in the backward mode, the fourth locking assembly 56 is released to close the backrest 43 to the seat 41 and fold to a preset angle, the fifth locking assembly 57 is linked to release the lock to rotate the armrest 42 to close the seat 41 and fold, and the armrest 42 is rotated to close the seat 41 to a preset angle and linked to release the lock to release the sixth locking assembly 58 to rotate the seat 41 to fold relative to the connecting seat 2 towards the rear leg 12; when the seat portion 41 is rotated and folded towards the rear leg 12 relative to the connecting seat 2, the seat portion 41 is linked with the first unlocking component 53 to unlock the first locking component 51 and the second locking component 52 correspondingly, and accordingly the push rod component 3 is rotated relative to the connecting seat 2 to be close to and folded towards the rear leg 12, and when the push rod component 3 is rotated to a preset angle, the push rod component 3 is linked with the front leg 11 again to be close to and folded towards the rear leg 12. The seat assembly 4 can be folded in rotation relative to the connecting seat 2 only when the seat assembly 4 is directed rearward.

When the child stroller needs to be folded, the seat assembly 4 is adjusted to the backward mode, then the fourth locking assembly 56 is unlocked through the backrest unlocking piece 564, the backrest 43 is pushed to rotate towards the seat portion 41, the fifth locking assembly 57 is unlocked through the backrest 43 in the process of rotating towards the seat portion 41, the armrest 42 rotates towards the seat portion 41 under the dead weight, the sixth locking assembly 58 is unlocked through the armrest 42 in the process of rotating towards the seat portion 41, the seat portion 41 can rotate towards the rear leg 12 relative to the connecting seat 2, and when the seat assembly 4 rotates towards the rear leg 12, the unlocking assembly 53 is pushed by the seat portion 41, so that the second locking assembly 52 and the first locking assembly 51 unlock the push rod assembly 3 to rotate towards the rear leg 12 relative to the connecting seat 2, and the front leg 11 also rotates towards the rear leg 12. In the folding process of the invention, when the seat assembly 4 is close to the rear leg 12, the push rod assembly 3 is also close to the rear leg 12, at the moment, the weight of the whole baby stroller is close to the rear leg 12, the rear leg 12 can be used as a fulcrum, when the push rod assembly 3 and the rear leg 12 are simultaneously contacted with the ground, the whole baby stroller can stand by itself with the rear leg 12 through the push rod assembly 3 when being folded, at the moment, the front leg 11 can rotate relative to the rear leg 12 and automatically close to the rear leg 12, and the baby stroller can be automatically folded, so that the whole folding operation is very simple.

A linkage assembly 6 which is rotated and folded to a preset angle towards the rear leg 12 relative to the connecting seat 2 at the push rod assembly 3 and is arranged between the push rod assembly 3 and the front leg 11 so that the push rod assembly 3 and the front leg 11 synchronously draw close and fold towards the rear leg 12. The linkage assembly 6 enables the push rod assembly 3 to drive the front leg 11 and the rear leg 12 to rotate together when the push rod assembly 3 rotates by a certain angle. At this time, the whole child cart does not need to be held when being folded, the child cart can stand by the rear legs 12 and the push rod assembly 3, and a adult can complete the folding of the whole child cart only by operating and pushing the backrest 43 to rotate towards the seat 41.

The push rod assembly 3 is provided with a second unlocking assembly 54 capable of unlocking the second locking assembly 52, a third locking assembly 55 capable of locking the bottom support frame 1 and the connecting seat 2 relatively and preventing the connecting seat 2 and the seat assembly 4 from rotating and reversing relatively to the bottom support frame 1 is arranged between the bottom support frame 1 and the connecting seat 2, and when the second locking assembly 52 is unlocked, the push rod assembly 3 can rotate upwards to a preset angle relatively to unlock the third locking assembly 55. The invention can change the direction of the seat assembly 4 back and forth, and when the second unlocking assembly 54 unlocks the second locking assembly 52, the push rod assembly 3 can rotate relative to the connecting seat 2, at the moment, the push rod assembly 3 can move from the unfolding position to the vertical position, and when the push rod assembly 3 moves from the unfolding position to the vertical position, the third locking assembly 55 is unlocked, at the moment, the connecting seat 2 and the seat assembly 4 can rotate relative to the bottom supporting frame 1.

The rear leg 12 includes a mounting base 122 and a rear leg rod 123 connected to the mounting base 122, the rear wheel 121 is connected to the rear leg rod 123, the front leg 11 is rotatably connected to the mounting base 122 about a first axis a, and the connection base 2 is rotatably connected to the mounting base 122. The mounting base 122 is provided to facilitate connection of the connection base 2 and the front leg 11.

The linkage assembly 6 comprises a sliding piece 61 which is slidably connected in a mounting seat 122 and one end of which is rotatably connected to the upper end of the front leg 11, a plurality of driven teeth 611 are arranged at the rear end of the sliding piece 61, a linkage piece 62 which can rotate relative to the front end of the sliding piece 61 and the front leg 12 is connected between the front end and the front leg 12, a plurality of rotating pieces 63 which can rotate relative to the push rod assembly 3 are connected in the connecting seat 2, and a plurality of driving teeth 64 which can be meshed and driven with the driven teeth 611 when the rotating pieces 63 rotate to a preset position are arranged on the rotating pieces 63. When the push rod assembly 3 is unlocked and then rotated to a preset position relative to the mounting seat 122 by the gravity of the push rod assembly 3, the driving teeth 64 on the rotating plates 63 are meshed with the driven teeth 611 on the sliding member 61, at this time, the sliding member 61 and the linkage plate 62 are pushed to move forward, and the linkage plate 62 rotates relative to the front end of the sliding member 61 and the upper end of the front leg 11, so that the front leg 11 and the push rod assembly 3 are driven to simultaneously rotate towards the rear leg 12.

The push rod assembly 3 comprises a rotating seat 31 which is rotatably connected to the connecting seat 2, a rotating rod 32 which transversely penetrates through the connecting seat 2 is connected to the rotating seat 31, a supporting rod 33 is further connected to the rotating seat 31, a push rod 34 which can slide and stretch relatively to the supporting rod 33 is connected to the supporting rod 33, the second locking assembly 52 comprises a left connecting shell 521 arranged on the connecting seat 2 and a right connecting shell 522 arranged on the rotating seat 31, a sealing space is enclosed between the left connecting shell 521 and the right connecting shell 522, a spline 524 which can transversely move in the sealing space and can be simultaneously clamped with a spline groove 523 on the left connecting shell 521 and the right connecting shell 522 is arranged in the sealing space, a spline resetting piece 525 is further arranged between the spline 524 and the right connecting shell 522, the first unlocking assembly 53 comprises a sliding block 531 which is slidably connected to the connecting seat 2, a protruding lug 5311 is arranged on the sliding block 531, a groove 5241 which can be contained is arranged on the spline 524, a first inclined surface 5312 is arranged on the protruding lug 5311, and a pushing piece 5312 can be separated from the sliding block 531 on the sliding seat 53, and can be elastically matched with the sliding block 53 on the sliding block 53, and the sliding block 53 can be rotated relatively to the sliding seat 53. When the seat 41 rotates relative to the connecting seat 2, the pushing surface 532 on the seat 41 pushes against the sliding block 531, the first inclined surface 5312 on the convex block 5311 of the sliding block 531 pushes against the second inclined surface 5242 on the upper spline groove 523, so that the spline 524 is pushed from the left connecting shell 521 into the right connecting shell 522, at this time, the second locking assembly 52 is unlocked, and the push rod assembly 3 can rotate relative to the connecting seat 2 and the rear leg 12 can rotate close.

The first locking component 51 includes a locking pin 511 disposed on the upper portion of the front leg 11 and a hook 512 rotatably disposed on the mounting base 122 and used for locking and matching with the locking pin 511, a hook elastic member 513 capable of pushing the hook 512 to reset is disposed between the hook 512 and the mounting base 122 so that the hook 512 is kept locked on the locking pin 511, and the first unlocking component 53 further includes a pushing block 534 slidably connected in the mounting base 122 and capable of pushing the hook 512 to rotate and separate from the locking pin 511 when the sliding block 531 slides downward. When the sliding block 531 is pushed by the pushing surface 532 to slide downward relative to the connecting seat 2, the sliding block 531 pushes the pushing block 534 to move downward, the pushing block 534 pushes the rear end of the hook 512 in the downward moving process, the front end of the hook 512 rotates relative to the mounting seat 122, at this time, the hook 512 is separated from the locking pin 511 on the front leg 11, and the top end of the front leg 11 is pushed by the sliding piece 61 to rotate the front leg 11 around the first axis a relative to the mounting seat 122 and draw close to the rear leg rod 123.

The third locking assembly 55 comprises a sleeve 554, a rotating shaft sleeve 555 and a locking piece 553, the sleeve 554 is relatively and fixedly arranged on the mounting seat 122, the rotating shaft sleeve 555 is rotatably connected with the sleeve 554, the connecting seat 2 is rotatably connected on the mounting seat 122 through the rotating shaft sleeve 555, a first locking groove 551 is axially formed in the front side surface of the sleeve 554, the locking piece 553 is arranged in the rotating shaft sleeve 555 and is connected with the rotating rod 32 in a same way, a avoidance through groove 556 is axially formed in the front side and the rear side of the rotating shaft sleeve 555, and a limiting blocking wall 557 is formed on the rear side surface of the sleeve 554 so that the locking piece 553 can only rotate and incline towards the rear leg 12; when the push rod assembly 3 is turned upwards to a preset angle, the locking piece 553 is separated from the first locking groove 551 along with the rotation of the rotating rod 32, the connecting seat 2 and the mounting seat 122 are unlocked, and the seat assembly 4 can be rotated and reversed along with the connecting seat 2.

The rear side of the sleeve 554 is provided with a second locking groove 552 along the axial direction, the depth of the second locking groove 552 is smaller than that of the first locking groove 551, and a limiting blocking wall 557 is formed at the bottom of the second locking groove 552 to limit the lower portion of the locking piece 553 from extending out of the rear side of the sleeve 554, so that the locking piece 553 can only rotate and tilt towards the rear leg 12.

The locking piece 553 comprises a locking piece 5531 capable of being clamped into the first locking groove 551, the locking piece 5531 is connected with a clamping protrusion 5532 capable of being clamped into the second locking groove 552, and the depth of the second locking groove 552 is smaller than that of the first locking groove 551, so that when the push rod assembly 3 rotates from the unfolding position to the vertical position, the bottom of the locking piece 553 and the limiting blocking wall 557 on the same side of the mounting seat 122 and the second locking groove 552 are propped against each other. When the push rod assembly 4 is in the unfolded state, the locking piece 5531 and the locking protrusion 5532 are respectively locked in the first locking groove 551 and the second locking groove 552, and the connecting seat 2 cannot rotate and reverse relative to the mounting seat 122. When the push rod assembly 4 rotates upwards from the rotating state to the vertical state, the locking piece 5531 and the clamping protrusion 5532 are separated from the first clamping groove 551 and the second clamping groove 552 respectively, and the limit blocking wall 557 is arranged, so that the push rod assembly 4 stays at the vertical position or is close to the vertical position, and the push rod assembly 4 can only rotate back and forth in one direction and is prevented from continuing to rotate forwards after reaching the vertical position.

The second unlocking assembly 54 includes a first unlocking member 541 disposed on the hand push rod 34, the second unlocking assembly 54 further includes a plurality of pull rods 542 connected to the spline 524 and capable of pulling the spline 524 to be separated from the spline groove 523 on the left connecting shell 521 when pulled, a pulling member 543 capable of driving the spline 524 to slide when sliding is connected between the ends of the plurality of pull rods 542, and a push rod unlocking linkage 544 is disposed between the pulling member 543 and the first unlocking member 541. When only the rotation reversing of the seat assembly 4 and the mounting seat 2 is needed, the first unlocking member 541 is operated, the push rod unlocking linkage member 544 is pulled after the first unlocking member 541 is operated, the push rod unlocking linkage member 544 drives the pulling member 543 to slide laterally, and when the pulling member 543 slides laterally, the pulling rod 542 is driven to further drive the spline 524 to slide, and the spline 524 is separated from the spline groove 523 on the left connecting shell 521, so that the push rod assembly 3 can move from the unfolded position to the vertical position.

The fourth locking assembly 56 includes an adjusting clamping position 561 disposed on the seat portion 41, a latch 562 movably inserted into the adjusting clamping position 561 is disposed on the back portion 43, an elastic pushing latch 562 is disposed on the back portion 43 to be clamped into a back adjusting locking elastic member 563 of the corresponding adjusting clamping position 561, and a back unlocking linkage 565 capable of driving the latch 562 to slide is disposed between the back unlocking member 564 and the latch 562. When the position of the backrest 43 relative to the seat 41 needs to be adjusted, the backrest unlocking member 564 is operated to drive the backrest unlocking linkage member 565 to move, the backrest unlocking linkage member 565 is moved to drive the latch member 562 to slide and separate from the adjustment position 561, the backrest 43 is rotated at this time to adjust the gear, when the backrest 43 is adjusted in place relative to the seat 41, the backrest unlocking member 564 is released, the backrest adjustment locking elastic member 563 pushes the latch member 562 to be latched with the adjustment position 561 again, and at this time, the seat 41 and the backrest 43 are locked. When it is desired to fold the seat assembly 4, the fourth locking assembly 56 is unlocked and the back portion 43 is pushed to rotate toward the seat portion 41.

The fifth locking assembly 57 includes a handrail locking hole 571 provided on the armrest portion 42, the seat portion 41 is provided with a handrail locking member 572 movably inserted into the handrail locking hole 571, one end of the handrail locking member 572 is provided with a propping portion 573 capable of extending into the backrest portion 43, the backrest portion 43 is further provided with a handrail linkage unlocking portion 574, when the backrest portion 43 rotates to a preset angle relative to the seat portion 41, the handrail linkage unlocking portion 574 pushes the propping portion 573 to disengage the handrail locking member 572 from the handrail locking hole 571 for releasing locking, and a handrail locking elastic member 575 is provided between the handrail locking member 572 and the seat portion 41 to enable the handrail locking member 572 to be clamped into the handrail locking hole 571. The armrest linkage unlocking portion 574 is a pushing surface provided on the backrest portion 43, when the backrest portion 43 rotates, the pushing surface on the backrest portion 43 pushes the armrest linkage unlocking portion 574, and the armrest linkage unlocking portion 574 drives the armrest locking member 572 to slide relative to the seat portion 41 so that the armrest locking member 572 is separated from the armrest locking hole 571, at this time, the armrest portion 42 is unlocked, and the armrest portion 42 rotates relative to the seat portion 41 under the action of the self-gravity of the armrest portion 42.

The sixth locking assembly 58 includes a seat locking hole 581 provided in the connecting seat 2, a seat locking pin 582 movably inserted into the seat locking hole 581 is provided at the bottom of the seat portion 41, a seat unlocking link 583 for linking the seat locking pin 582 to move out of the seat locking hole 581 when the armrest locking member 572 is moved out of the armrest locking hole 571 is provided between the seat locking pin 582 and the armrest locking member 572, and a seat locking elastic member 584 for elastically pressing the seat locking pin 582 to be extended is provided between the seat locking pin 582 and the seat portion 41. When the backrest 43 pushes the armrest locking member 572 to slide, the armrest locking member 572 pulls the seat unlocking linkage 583 to move, and the seat unlocking linkage 583 moves to drive the seat lock pin 582 to slide upward relative to the connecting seat 2 and disengage from the seat locking hole 581, so that the seat 41 can rotate relative to the connecting seat 2 and the rear leg 12 can rotate closer together.

A torsion spring 7 is arranged between the front leg 11 and the mounting seat 122, and the front leg 11 is automatically folded towards the rear leg 12 by assistance after the front leg 11 is unlocked. When the front leg 11 is in the unfolded state, the torsion spring 7 is in the compressed state, and when the front leg 11 is folded, the torsion spring 7 moves from the compressed state to the normal state, and at the moment, the torsion spring 7 applies thrust to the front leg 11, so that the front leg 11 automatically rotates towards the rear leg 12.

The mounting seat 122 and the rotating seat 31 are directly provided with a seventh locking structure 59, the seventh locking structure 59 comprises a vertical locking position 591 which is arranged on the rotating seat 31 and corresponds to the vertical position, the mounting seat 122 is provided with a clamping block 592 which can slide relatively to the mounting seat to be clamped in or separated from the vertical locking position 591, the clamping block 592 is provided with an arc surface 5921 which can be propped against the wall surface of the vertical locking position 591 to enable the clamping block 592 to slide, and a spring 593 which can enable the clamping block 592 to reset is arranged between the clamping block 592 and the mounting seat 122. The vertical lock position 591 is a groove. When the push rod assembly 3 rotates to a vertical state relative to the connecting seat 2, the clamping block 592 is aligned with the vertical locking position 591, the spring 593 pushes the clamping block 592 to reset, and at the moment, the clamping block 592 is clamped into the vertical locking position 591.

The positioning pin 21 is arranged on the mounting seat 2, the accommodating groove 411 which can accommodate the positioning pin 21 when the positioning pin 21 is unfolded is arranged on the seat part 41, the abutting surface 412 which can mutually abut against the positioning pin 21 is arranged on the accommodating groove 411, the support between the seat part 41 and the mounting seat 2 is more stable, and the safety is better.

Claims

1. A stroller with a foldable bottom support frame (1), characterized in that the bottom support frame (1) comprises a front leg (11) with a front wheel (111) and a rear leg (12) with a rear wheel (121), the front leg (11) is rotatably connected with the rear leg (12), a connecting seat (2) is rotatably connected with the upper part of the bottom support frame (1), and a push rod component (3) is rotatably connected with the connecting seat (2);

a first locking component (51) capable of locking the front leg (11) and the rear leg (12) relatively is arranged between the upper ends of the front leg and the rear leg, a second locking component (52) capable of locking the push rod component (3) and the connecting seat (2) relatively is arranged between the push rod component and the connecting seat, and a first unlocking component (53) for interlocking the first locking component (51) and the second locking component (52) and correspondingly unlocking is arranged on the connecting seat (2);

the connecting seat (2) is further connected with a foldable seat assembly (4) capable of rotating relative to the bottom support frame (1) along with the connecting seat (2) to switch a forward mode and a backward mode, the seat assembly (4) comprises a seat part (41), a handrail part (42) and a backrest part (43), a fourth locking assembly (56) for locking the backrest part (43) relative to the seat part (41) is arranged between the backrest part (43) and the seat part (41), a backrest unlocking piece (564) for unlocking the fourth locking assembly (56) is arranged on the backrest part (43), a fifth locking assembly (57) for locking the handrail part (42) relative to the seat part (41) is arranged between the handrail part (42) and the seat part (41), and a sixth locking assembly (58) for locking the handrail part (42) relative to the seat part (41) is arranged between the seat part (41) and the connecting seat (2);

when the seat assembly (4) is in a backward mode, the fourth locking assembly (56) is firstly released to enable the backrest (43) to be close to the seat (41) and folded to a preset angle, the fifth locking assembly (57) is linked to release the lock to enable the armrest (42) to be close to the seat (41) in a rotating mode, the armrest (42) is close to the seat (41) in a rotating mode to a preset angle, and then the sixth locking assembly (58) is linked to release the lock to enable the seat (41) to be folded in a rotating mode relative to the connecting seat (2) in the rear leg (12) direction; when the seat part (41) rotates and folds towards the rear leg (12) relative to the connecting seat (2), the seat part (41) is linked with the first unlocking component (53) to correspondingly unlock the first locking component (51) and the second locking component (52), the push rod component (3) rotates relative to the connecting seat (2) to fold towards the rear leg (12), and when the push rod component (3) rotates to a preset angle, the push rod component (3) is linked with the front leg (11) again to fold towards the rear leg (12).

2. The stroller of claim 1, wherein a linkage assembly (6) is provided between the push rod assembly (3) and the front leg (11) for rotating the push rod assembly (3) relative to the connecting seat (2) toward the rear leg (12) to fold to a predetermined angle so as to enable the push rod assembly (3) and the front leg (11) to synchronously fold toward the rear leg (12).

3. The stroller of claim 1, wherein the push rod assembly (3) is provided with a second unlocking assembly (54) capable of unlocking the second locking assembly (52), a third locking assembly (55) capable of locking the bottom support frame (1) and the connecting seat (2) relatively and preventing the connecting seat (2) and the seat assembly (4) from rotating and reversing relatively to the bottom support frame (1) is arranged between the bottom support frame (1) and the connecting seat (2), and when the second locking assembly (52) is unlocked, the push rod assembly (3) can rotate upwards to a preset angle relatively to the connecting seat (2) to unlock the third locking assembly (55).

4. The stroller of claim 1, wherein the rear leg (12) comprises a mounting seat (122) and a rear leg rod (123) connected to the mounting seat (122), the rear wheel (121) is connected to the rear leg rod (123), the front leg (11) is rotatably connected to the mounting seat (122), the connecting seat (2) is rotatably connected to the mounting seat (122), the linkage assembly (6) comprises a sliding piece (61) slidably connected to the mounting seat (122), the rear end of the sliding piece (61) is provided with a driven tooth (611), a linkage piece (62) capable of rotating relative to the front end of the sliding piece (61) and the front leg (12) is pivoted between the front end of the sliding piece and the front leg (12), a rotating piece (63) is connected to the connecting seat (2) in a same manner, and a driving tooth (64) capable of being meshed with the driven tooth (611) when the rotating piece is rotated to a preset angle is arranged on the rotating piece (63) so that the pushing piece (3) and the front leg (11) can be synchronously folded towards the rear leg (12).

5. The stroller of claim 1, wherein the push rod assembly (3) comprises a rotating seat (31) rotatably connected to the connecting seat (2), a rotating rod (32) connected between the two rotating seats (31) in a co-moving manner, a supporting rod (33) is further connected to the rotating seat (31), a push rod (34) is connected to the supporting rod (33), the second locking assembly (52) comprises a left connecting shell (521) and a right connecting shell (522) respectively arranged on the connecting seat (2), a containing space is formed between the left connecting shell (521) and the rotating seat (31) and between the right connecting shell (522) and the rotating seat (31) and is provided with a spline groove (523), a spline (524) for being clamped with the spline groove (523) is movably arranged in the containing space, a reset member (34) is further arranged between the spline (524) and the rotating seat (31), the first unlocking assembly (53) comprises a sliding block (531) respectively arranged in the connecting seat (2), a sliding block (531) is arranged on the sliding block (531), a corresponding protrusion (5311) is arranged on the sliding block (5311), and a corresponding protrusion (5311) is arranged on the sliding block (5311), be equipped with on recess (5241) can cooperate with first oblique slip plane (5312) so that lug (5311) top spline (524) correspondingly break away from second oblique slip plane (5242) of spline groove (523) on left coupling shell (521) and right coupling shell (522), be equipped with on seat portion (41) and can push sliding block (531) gliding pushing surface (532) when its relative connecting seat (2) rotates, be equipped with between sliding block (531) and connecting seat (2) and be used for pushing sliding block (531) the top piece elastic component (533) that resets.

6. The stroller of claim 1, wherein the rear leg (12) comprises a mounting base (122) and a rear leg rod (123) connected to the mounting base (122), the upper portion of the front leg (11) is rotatably connected to the mounting base (122), the connecting base (2) is rotatably connected to the mounting base (122), the first locking assembly (51) comprises a lock pin (511) arranged on the upper portion of the front leg (11) and a hook (512) rotatably arranged on the mounting base (122) and used for being in locking fit with the lock pin (511), a hook elastic piece (513) capable of pushing the hook (512) to reset is arranged between the hook (512) and the mounting base (122) so that the hook (512) is kept locked on the lock pin (511), and the first unlocking assembly (53) further comprises a pushing block (534) which is slidably connected in the mounting base (122) and is used for pushing the hook (512) to rotate to be separated from the lock pin (511) when the sliding block (531) slides downwards.

7. A stroller according to claim 3, characterized in that the rear leg (12) comprises a mounting base (122) and a rear leg rod (123) connected to the mounting base (122), the upper part of the front leg (11) is rotatably connected to the mounting base (122), the connecting base (2) is rotatably connected to the mounting base (122), the push rod assembly (3) comprises a rotating rod (32) which can relatively rotate and transversely penetrate through a rotating shaft sleeve (555), the third locking assembly (55) comprises a sleeve (554), the rotating shaft sleeve (555) and a locking piece (553), the sleeve (554) is relatively fixedly arranged on the mounting base (122), the rotating shaft sleeve (555) is rotatably connected with the sleeve (554), the connecting base (2) is rotatably connected to the mounting base (122) through the rotating shaft sleeve (555), a first locking groove (551) is axially formed in the front side surface of the sleeve (554), the locking piece (553) is arranged in the rotating shaft sleeve (555) and transversely penetrates through the rotating shaft sleeve (555), and the locking piece (553) is axially formed in a position opposite to the rotating shaft sleeve (555), and the front side surface (554) is provided with a stop groove (553) which can only axially incline to the rear side (554) of the sleeve (12; when the push rod assembly (3) is turned upwards to a preset angle, the locking piece (553) is separated from the first clamping and locking groove (551) along with the rotation of the rotating rod (32), the connecting seat (2) and the mounting seat (122) are unlocked, and the seat assembly (4) can be rotated and reversed along with the connecting seat (2).

8. The stroller of claim 7, wherein the rear side of the sleeve (554) is provided with a second locking groove (552) along the axial direction, the second locking groove (552) has a depth smaller than that of the first locking groove (551), and the limiting blocking wall (557) is formed at the bottom of the second locking groove (552) to limit the lower portion of the locking piece (553) from extending out of the rear side of the sleeve (554), so that the locking piece (553) can only rotate and tilt in the direction of the rear leg (12).

9. The stroller of claim 5, wherein the second unlocking assembly (54) comprises a first unlocking member (541) disposed on the hand push rod (34), the second unlocking assembly (54) further comprises a pull rod (542) connected to the spline (524) for driving the spline (524) to be separated from the spline grooves (523) on the left connecting shell (521) and the right connecting shell (522) respectively, a pulling member (543) is connected to an end portion of the pull rod (542), and a push rod unlocking linkage member (544) is disposed between the pulling member (543) and the first unlocking member (541).

10. The stroller of claim 1, wherein the fourth locking assembly (56) comprises an adjusting clamp (561) disposed on the seat portion (41), a latch (562) movably inserted into the adjusting clamp (561) is disposed on the backrest portion (43), an elastic pushing latch (562) is disposed on the backrest portion (43) to be clamped into a backrest adjusting locking elastic member (563) of the corresponding adjusting clamp (561), and a backrest unlocking linkage (565) capable of driving the latch (562) to slide is disposed between the backrest unlocking member (564) and the latch (562).

11. The stroller of claim 1, wherein the fifth locking assembly (57) comprises a armrest locking hole (571) provided in the armrest portion (42), the seat portion (41) is provided with an armrest locking member (572) movably inserted into the armrest locking hole (571), one end of the armrest locking member (572) is provided with a supporting portion (573) capable of extending into the backrest portion (43), the backrest portion (43) is further provided with an armrest linkage unlocking portion (574), and when the backrest portion (43) rotates to a preset angle relative to the seat portion (41), the armrest linkage unlocking portion (574) pushes the supporting portion (573) to enable the armrest locking member (572) to be separated from the armrest locking hole (571) for unlocking, and an armrest locking elastic member (575) for enabling the armrest locking member (572) to remain clamped into the armrest locking hole (571) is provided between the armrest locking member (572) and the seat portion (41).

12. The stroller of claim 11, wherein the sixth locking assembly (58) comprises a seat locking hole (581) provided in the connecting seat (2), a seat lock pin (582) movably inserted into the seat locking hole (581) is provided at the bottom of the seat portion (41), a seat unlocking linkage (583) for linking the seat lock pin (582) to move out of the seat locking hole (581) when the armrest lock (572) is moved out of the armrest locking hole (571) is provided between the seat lock pin (582) and the armrest lock (572), and a seat locking elastic member (584) for elastically pressing the seat lock pin (582) to be extended is provided between the seat lock pin (582) and the seat portion (41).

13. The stroller of claim 1, wherein the rear leg (12) comprises a mounting seat (122) and a rear leg rod (123) connected to the mounting seat (122), the front leg (11) is rotatably connected to the mounting seat (122), the connecting seat (2) is rotatably connected to the mounting seat (122), and a torsion spring (7) for automatically folding the front leg (11) toward the rear leg (12) by assisting the front leg (11) after unlocking the front leg (11) is arranged between the front leg (11) and the mounting seat (122).