CN221794729U - Child cart - Google Patents

Abstract

The utility model discloses a child stroller, wherein the bottom frame comprises a front leg, a rear leg capable of rotating relative to the front leg around a first axis A is connected to the front leg, a support rod capable of rotating relative to the rear leg around a second axis B is connected to the bottom frame, a seat assembly capable of following the rotation and folding or rotating and unfolding is arranged between the support rod and the bottom frame, the seat assembly comprises a linkage rod rotatably connected to the support rod around a third axis C, a connecting seat capable of rotating relative to the rear leg around a fourth axis D is connected to the bottom frame, a seat member capable of relative movement between the linkage rod and the connecting seat is also arranged between the linkage rod and the connecting seat, the seat member is rotationally connected to the linkage rod around a fifth axis E, and the seat member is also slidably connected to the connecting seat, and a transmission assembly capable of driving the front leg to rotate and approach the rear leg around the first axis A when the seat assembly is rotated and folded is arranged between the seat assembly and the bottom frame. The utility model aims to overcome the deficiencies of the prior art and provide a child stroller that is easy to fold.

Description

A child stroller

[Technical field]

The utility model relates to a baby stroller.

[Background technology]

At present, baby strollers have become an indispensable item for children in their growth process. Baby strollers on the market can generally be folded or unfolded, but the existing baby strollers have a complex transmission structure, many connecting rods, and are still large in size after folding. Therefore, people are very eager for a baby stroller that is easy to fold and unfold. The present invention provides a new baby stroller structure.

[Utility Model Content]

The utility model aims to overcome the shortcomings of the prior art and provide a child stroller which is easy to fold.

The utility model is realized by the following technical solutions:

A child stroller, which can be moved from an unfolded position to a folded position after a locking device is unlocked, comprises a bottom frame, the bottom frame comprises a front leg 11, the front leg 11 is connected to a rear leg 12 which can rotate relative to the front leg 11 around a first axis A, the bottom frame is connected to a support rod 13 which can rotate relative to the rear leg 11 around a second axis B, a seat assembly 2 which can be rotated and folded or unfolded when the support rod 13 is rotated and folded or unfolded relative to the bottom frame is provided between the support rod 13 and the bottom frame, the seat assembly 2 comprises a linkage rod 21 which is rotatably connected to the support rod 13 around a third axis C ... A connecting seat 22 which can rotate relative to the connecting seat 22 around the fourth axis D is connected to the bottom frame, and a seat member 23 which can move relative to the connecting seat 22 is provided between the connecting rod 21 and the connecting seat 22. The seat member 23 is rotationally connected to the connecting rod 21 around the fifth axis E, and the seat member 23 is also slidably connected to the connecting seat 22. A transmission assembly 3 is provided between the seat assembly 2 and the bottom frame, which can drive the front legs 11 to rotate and move closer to the rear legs 12 around the first axis A when the seat assembly 2 is rotated and folded. The front legs 11 are connected to front wheels 111, and the rear legs 12 are connected to rear wheels 121.

The connecting seat 22 includes a rotating part 221 that is rotatably connected to the rear leg 12 around a fourth axis D, the rotating part 221 is provided with a protruding connecting part 222, the connecting part 222 is provided with a sliding groove 2221, the seat part 23 includes a seat frame 231 that is rotatably connected to the connecting rod 21 around a fifth axis E, and the seat frame 231 is also provided with a guide rod 232 that passes through the sliding groove 2221 and can slide in the sliding groove 2221.

The transmission assembly 3 includes a first transmission rod 31 rotatably connected to the rear leg 12 around a sixth axis F, one end of the first transmission rod 31 is rotatably connected to the seat member 23 or the connecting rod 21 around a seventh axis G, and a second transmission rod 32 is rotatably connected to the front leg 11 around an eighth axis H, and the other end of the second transmission rod 32 is rotatably connected to the first transmission rod 31 around a ninth axis I.

The locking device includes a first locking component 41 arranged between the front leg 11 and the rear leg 12, and a second locking component 42 is arranged between the support rod 13 and the front leg 11, which can lock the two. When the second locking component 42 is unlocked and the support rod 13 is rotated and folded relative to the front leg 11, the first locking component 41 can be unlocked.

The second locking assembly 42 comprises a first rotating shell 421 disposed on the front leg 11, a second rotating shell 422 is disposed on the support rod 13, a first activity space 423 is formed between the second rotating shell 422 and the first rotating shell 421, a first spline groove 424 is disposed on both the second rotating shell 422 and the first rotating shell 421, a first spline 425 capable of relative movement is disposed in the first activity space 423, and a first locking assembly 41 is provided with a first spline 425 capable of pushing the first spline 425 and A movable part 415 is provided so that the first spline 425 is engaged with the first spline groove 424 on the second rotating shell 422 and the first rotating shell 421 at the same time. A first pushing part 426 is provided between the first spline 425 and the second rotating shell 422, which can push the first spline 425 to slide laterally and disengage from the second rotating shell 422. A push rod 14 is connected to the support rod 13 and can rotate relative to it. A first cable 427 is provided between the push rod 14 and the first pushing part 426, which can drive the first pushing part 426 to move.

The second rotating shell 422 is provided with a plurality of first pushing protrusions 4221, the first pushing protrusion 4221 is provided with a first pushing surface 4222, the first pushing member 426 is provided with a first accommodating groove 4261 capable of accommodating the first pushing protrusion 4221, and the first pushing member 426 is provided with a second pushing surface 4262 capable of cooperating with the first pushing surface 4222 to push the first pushing member 426 to slide laterally and located at the first accommodating groove 4261.

The first locking assembly 41 includes a first connecting shell 411 disposed on the rear leg 12, a second connecting shell 412 is disposed on the front leg 11, a second activity space 413 is formed between the second connecting shell 412 and the first connecting shell 411, a second spline groove 414 is provided on both the second connecting shell 412 and the first connecting shell 411, the movable member 415 is a second spline disposed in the second activity space 413 and capable of moving relative thereto, and a second spline is provided between the second spline and the first connecting shell 411. An elastic member 416 is provided which enables the second spline to be simultaneously engaged with the second spline groove 414 on the second connecting shell 412 and the first connecting shell 411; the second connecting shell 412 is provided with a plurality of through holes 4121 which can connect the second active space 413 with the first active space 423; the first spline 425 is provided with a plurality of pushing portions 4251 which can pass through the through holes 4121 into the second active space 413 and can push the second spline out of the second connecting shell 412 when the first spline 425 slides laterally.

The rear leg 12 includes a rear leg rod 122 that is rotatably connected to the front leg 11 around a first axis A, a first cross brace rod 123 for lateral support is connected to the rear leg rod 122, an end of the rear leg rod 122 is connected to a second cross brace frame 124 for lateral support, the rear wheel 121 is connected to the second support frame 124, a brake assembly 125 is provided between the rear wheel 121 and the second support frame 124, and the first transmission rod 31 is rotatably connected to the first cross brace rod 123 around a sixth axis F.

The second support frame 124 includes a bottom support seat 1241 connected to the rear wheel 121, the bottom support seat 1241 is connected to a cross bar 1242 that can extend laterally relative to the bottom support seat 1241, the cross bar 1242 is also connected to a rotating seat 1243 that is movably connected to the bottom support seat 1241, the rotating seat 1243 is fixedly connected to the cross bar 1242 and rotates with the cross bar 1242 when the cross bar 1242 rotates, the cross bar 1242 is rotatably connected to the bottom support seat 1241, the brake assembly 125 includes a plurality of locking positions 1251 provided on the rear wheel 121, the bottom support seat 1241 is provided with a sliding member 1252 that can slide relative to the bottom support seat 1241, and the sliding member 1252 is provided with a A locking pin 1253 slides relative to it and is stuck into the locking position 1251. A first elastic element 1254 that can push the locking pin 1253 to return to its original position is provided between the locking pin 1253 and the sliding member 1252. A second elastic element 1255 that can push the sliding member 1252 to return to its original position is provided between the sliding member 1252 and the bottom support seat 1241. A locking groove 12431 that can push the sliding member 1252 to allow the locking pin 1253 to be stuck into the locking position 1251 and an unlocking groove 12432 that can make way for the sliding member 1252 to allow the locking pin 1253 to be disengaged from the locking position 1251 are provided along the circumference of the rotating seat 1243. The brake assembly 125 also includes a pedal 1256 fixedly connected to the cross bar 1242.

A positioning assembly 126 capable of keeping the brake assembly 125 in a locked state or an unlocked state is also provided between the bottom support seat 1241 and the rotating seat 1243. The positioning assembly 126 includes a positioning block 1261 slidably connected to the bottom support seat 1241. The rotating seat 1243 is provided with a braking position 1262 capable of positioning the brake assembly 125 in a braking state and an unlocking position 1263 capable of positioning the brake assembly 125 in an unlocked state. An elastic component 1264 capable of pushing the positioning block 1261 to reset is provided between the positioning block 1261 and the bottom support seat 1241.

Compared with the prior art, the utility model has the following advantages:

1. When the child stroller of the utility model needs to be folded, the locking device is first unlocked, and then the support rod is pushed to rotate relative to the bottom support frame around the second axis B and move closer to the rear legs. During the rotation and folding process of the support rod, the support rod drives the connecting rod to move, and the connecting rod follows the movement of the support rod and rotates relative to the support rod around the third axis C. At this time, the other end of the connecting rod rotates relative to the seat member around the fifth axis E and drives the seat member to move. When the seat member moves, the connecting seat drives the connecting seat to move, and the connecting seat rotates relative to the bottom frame around the fourth axis D. Under the cooperation of the connecting seat and the connecting rod, the seat member gradually moves closer to the rear legs and folds. When the support rod rotates and folds, the transmission assembly is synchronously driven by the support rod to make the front legs rotate closer to the rear legs around the first axis A. When the support rod is close to the rear legs, the seat member is close to the rear legs, and the front legs are close to the rear legs, the entire child stroller is folded. The folded volume is small, which is more convenient for storage and carrying.

2. The rotating part is easy to connect, and when the seat frame is pulled by the connecting rod, the guide rod on the seat frame slides along the sliding groove, and the connecting part moves along with the seat member. At this time, the rotating part rotates relative to the rear legs, and the seat frame gradually and automatically folds toward the rear legs.

【Brief Description of the Drawings】

FIG1 is a perspective view of a child stroller of the present utility model;

FIG2 is a side view of the child stroller of the present invention;

FIG3 is a second side view of the child stroller of the present utility model;

FIG4 is a perspective view of a seat assembly of a child stroller of the present invention;

FIG5 is an exploded view of the seat assembly of the child stroller of the present invention;

FIG6 is an exploded view of the first locking assembly and the second locking assembly of the child stroller of the present invention;

FIG. 7 is a second exploded view of the first locking assembly and the second locking assembly of the child stroller of the present invention;

FIG8 is an exploded view of the support rod and the push rod in the child stroller of the present invention;

FIG9 is a perspective view of a support rod in a child stroller of the present invention;

FIG10 is a perspective view of the rear legs of the child stroller of the present invention;

FIG11 is an exploded view of the second support frame of the child stroller of the present invention;

FIG12 is a second exploded view of the second support frame of the child stroller of the present invention;

13 is a perspective view of a sliding member and a locking pin in the child stroller of the present invention;

14 is an exploded view of the sliding member and the locking pin in the child stroller of the present invention;

15 is a perspective view of a positioning block in the utility model stroller;

16 is a perspective view of the rotating seat in the utility model stroller;

FIG17 is a side view of the utility model when the child stroller is folded;

FIG. 18 is a second side view of the utility model when the child stroller is folded.

[Specific implementation method]

The utility model is further described below in conjunction with the accompanying drawings:

As shown in Figures 1 to 18, the utility model provides a child stroller, which can be moved from an unfolded position to a folded position after unlocking a locking device, including a bottom frame, the bottom frame including a front leg 11, the front leg 11 is connected to a rear leg 12 that can rotate relative to the front leg around a first axis A, the bottom frame is connected to a support rod 13 that can rotate relative to the rear leg around a second axis B, a seat assembly 2 is provided between the support rod 13 and the bottom frame, and can be rotated and folded or rotated and unfolded when the support rod 13 is rotated and folded relative to the bottom frame, and the seat assembly 2 includes a seat assembly connected to the support rod 13 around a third axis C. A connecting rod 21, a connecting seat 22 which can rotate relative to it around a fourth axis D is connected to the bottom frame, a seat member 23 which can move relative to the connecting rod 21 and the connecting seat 22 is also provided between the connecting rod 21 and the connecting seat 22, the seat member 23 is rotationally connected to the connecting rod 21 around a fifth axis E, and the seat member 23 is also slidably connected to the connecting seat 22, a transmission assembly 3 is provided between the seat assembly 2 and the bottom frame, which can drive the front legs 11 to rotate around the first axis A toward the rear legs 12 when the seat assembly 2 is rotated and folded, the front legs 11 are connected to front wheels 111, and the rear legs 12 are connected to rear wheels 121.

When the stroller of the utility model needs to be folded, the locking device is first unlocked, and then the support rod 13 is pushed to rotate relative to the bottom support frame around the second axis B and move closer to the rear leg 12. During the rotation and folding process of the support rod 13, the support rod 13 drives the connecting rod 21 to move, and the connecting rod 21 follows the movement of the support rod 13 and rotates relative to the support rod 13 around the third axis C. At this time, the other end of the connecting rod 21 rotates relative to the seat member 23 around the fifth axis E and drives the seat member 23 to move. When the seat member 23 moves, it drives the connecting seat 22 to move, and the connecting seat 22 moves. The seat 22 rotates around the fourth axis D relative to the bottom frame, and the seat member 23 gradually folds toward the rear leg 12 under the cooperation of the connecting seat 22 and the connecting rod 21. When the support rod 13 rotates and folds, the transmission assembly 3 is synchronously driven by the support rod 13 to make the front leg 11 rotate and approach the rear leg 12 around the first axis A. When the support rod 13 and the rear leg 12 are close, the seat member 23 and the rear leg 12 are close, and the front leg 11 and the rear leg 12 are close, the entire child stroller is folded. The folded volume is small and it is more convenient to store and carry.

As shown in Figs. 3 to 5, the connecting seat 22 comprises a rotating part 221 connected to the rear leg 12 by rotation about the fourth axis D, a protruding connecting part 222 is provided on the rotating part 221, a sliding groove 2221 is provided on the connecting part 222, and the seat member 23 comprises a seat frame 231 connected to the linkage rod 21 by rotation about the fifth axis E, and a guide rod 232 penetrating the sliding groove 2221 and capable of sliding in the sliding groove 2221 is provided on the seat frame 231. The rotating part 221 is convenient for connection, and when the seat frame 231 is pulled by the linkage rod 21, the guide rod 232 on the seat frame 231 slides along the sliding groove 2221, and the connecting part 222 moves with the seat member 23, at which time the rotating part 221 rotates relative to the rear leg 12, and the seat frame 231 gradually and automatically folds toward the rear leg 12.

As shown in Figure 3, the transmission assembly 3 includes a first transmission rod 31 rotatably connected to the rear leg 12 around a sixth axis F, one end of the first transmission rod 31 is rotatably connected to the seat member 23 or the connecting rod 21 around a seventh axis G, and a second transmission rod 32 is rotatably connected to the front leg 11 around an eighth axis H, and the other end of the second transmission rod 32 is rotatably connected to the first transmission rod 31 around a ninth axis I.

When the seat member 23 is driven by the support rod 13, the seat member 23 drives the end of the first transmission rod 31 to move, and the end of the first transmission rod 31 rotates relative to the seat member 23 around the seventh axis G, and the first transmission rod 31 rotates relative to the rear leg 12 around the sixth axis F. At this time, the connection between the first transmission rod 31 and the second transmission rod 32 moves upward, and the first transmission rod 31 rotates relative to the second transmission rod 32 around the ninth axis I, and the other end of the second transmission rod 32 rotates relative to the front leg 11 around the eighth axis H. At this time, the front leg 11 is driven by the second transmission rod 32 to fold toward the rear leg 12.

As shown in FIGS. 6 and 7 , the locking device includes a first locking assembly 41 disposed between the front leg 11 and the rear leg 12, and a second locking assembly 42 capable of locking the support rod 13 and the front leg 11 is disposed between the support rod 13 and the front leg 11, and when the second locking assembly 42 is unlocked and the support rod 13 is rotated and folded relative to the front leg 11, the first locking assembly 41 can be driven to unlock. The second locking assembly 42 can be unlocked in conjunction with the first locking assembly 41.

As shown in FIGS. 6 and 7, the second locking assembly 42 includes a first rotating shell 421 disposed on the front leg 11, a second rotating shell 422 is disposed on the support rod 13, a first activity space 423 is formed between the second rotating shell 422 and the first rotating shell 421, a first spline groove 424 is disposed on both the second rotating shell 422 and the first rotating shell 421, a first spline 425 capable of relative movement is disposed in the first activity space 423, and a first spline 425 capable of pushing the first spline is disposed in the first locking assembly 41. The movable part 425 makes the first spline 425 and the second rotating shell 422 and the first spline groove 424 on the first rotating shell 421 engage with each other at the same time, and a first pushing member 426 is provided between the first spline 425 and the second rotating shell 422, which can push the first spline 425 to slide laterally and disengage from the second rotating shell 422, and the support rod 13 is connected to a push rod 14 which can rotate relative to the support rod, and a first cable 427 which can drive the first pushing member 426 to move is provided between the push rod 14 and the first pushing member 426. When the push rod 14 is rotated and folded relative to the support rod 13, the push rod 14 can drive the first cable 427 to move, and the first cable 427 drives the first pushing member 426 to rotate relative to the second rotating shell 422, and the first pushing member 426 also slides laterally relative to the second rotating shell 422 when rotating relative to the second rotating shell 422. At this time, the first pushing member 426 pushes the first spline 425 to slide laterally, and the first spline 425 gradually disengages from the first spline groove 424 on the second rotating shell 422 and completely enters into the first rotating shell 421. At this time, the support rod 13 can be rotated and folded toward the rear leg 12 relative to the front leg 11.

As shown in Figures 6 to 7, the second rotating shell 422 is provided with a plurality of first pushing protrusions 4221, the first pushing protrusions 4221 are provided with a first pushing surface 4222, the first pushing member 426 is provided with a first accommodating groove 4261 capable of accommodating the first pushing protrusions 4221, and the first pushing member 426 is provided with a second pushing surface 4262 capable of cooperating with the first pushing surface 4222 to push the first pushing member 426 to slide laterally and located at the first accommodating groove 4261.

When the first pushing member 426 is driven by the first cable 427 to rotate relative to the second rotating shell 422, during the process of the first pushing member 426 rotating relative to the second rotating shell 422, the second pushing surface 4262 on the first pushing member 426 is gradually pushed by the first pushing surface 4222, and the entire first pushing member 426 gradually slides laterally relative to the second rotating shell 422.

As shown in FIGS. 6 and 7 , the first locking assembly 41 includes a first connecting shell 411 disposed on the rear leg 12, a second connecting shell 412 is disposed on the front leg 11, a second activity space 413 is formed between the second connecting shell 412 and the first connecting shell 411, a second spline groove 414 is provided on both the second connecting shell 412 and the first connecting shell 411, the movable member 415 is a second spline disposed in the second activity space 413 and capable of moving relative thereto, and the second spline and the first connecting shell 411 are connected to each other. An elastic member 416 is provided in between, which can enable the second spline to engage with the second spline groove 414 on the second connecting shell 412 and the first connecting shell 411 at the same time. The second connecting shell 412 is provided with a plurality of through holes 4121 that can connect the second active space 413 with the first active space 423. The first spline 425 is provided with a plurality of pushing parts 4251 that can pass through the through holes 4121 to the second active space 413 and can push the second spline out of the second connecting shell 412 when the first spline 425 slides horizontally.

And when the first spline 425 slides laterally to unlock the second locking assembly 42, the multiple pushing parts 4251 on the first spline 425 gradually enter into the second activity space 413 through the multiple through holes 4121, that is, the multiple pushing parts 4251 gradually contact the second spline and push the second spline to slide laterally. At this time, the entire second spline gradually detaches from the second connecting shell 412 and completely enters into the first connecting shell 411. At this time, the entire first locking assembly 41 is unlocked, and the front leg 11 can be rotated and folded relative to the rear leg 12.

As shown in Figs. 10 to 12, the rear leg 12 includes a rear leg rod 122 rotatably connected to the front leg 11 around the first axis A, a first cross brace rod 123 for lateral support is connected to the rear leg rod 122, a second support frame 124 for lateral support is connected to the end of the rear leg rod 122, the rear wheel 121 is connected to the second support frame 124, a brake assembly 125 is provided between the rear wheel 121 and the second support frame 124, and the first transmission rod 31 is rotatably connected to the first cross brace rod 123 around the sixth axis F. The arrangement of the first cross brace rod 123 and the second support frame 124 provides a better lateral support force for the stroller.

As shown in Figures 10 to 12, the second support frame 124 includes a bottom support seat 1241 connected to the rear wheel 121, the bottom support seat 1241 is connected to a cross bar 1242 that can extend laterally relative to it, and the cross bar 1242 is also connected to a rotating seat 1243 that is movably connected to the bottom support seat 1241, the rotating seat 1243 is fixedly connected to the cross bar 1242 and rotates with the cross bar 1242 when the cross bar 1242 rotates, the cross bar 1242 is rotatably connected to the bottom support seat 1241, and the brake assembly 125 includes a plurality of locking positions 1251 provided on the rear wheel 121, and the bottom support seat 1241 is provided with a sliding member 1252 that can slide relative to it, and the sliding member 1252 A locking pin 1253 is provided inside the rotating seat 1243 which can slide relative to the locking pin 1253 and be snapped into the locking position 1251. A first elastic element 1254 which can push the locking pin 1253 to return to its original position is provided between the locking pin 1253 and the sliding member 1252. A second elastic element 1255 which can push the sliding member 1252 to return to its original position is provided between the sliding member 1252 and the bottom supporting seat 1241. A locking groove 12431 which can push the sliding member 1252 to allow the locking pin 1253 to be snapped into the locking position 1251 and an unlocking groove 12432 which can make way for the sliding member 1252 to allow the locking pin 1253 to be released from the locking position 1251 are provided along the circumference of the rotating seat 1243. The brake assembly 125 also includes a pedal 1256 fixedly connected to the cross bar 1242.

When the stroller needs to brake, the pedal 1256 is stepped on, and the pedal 1256 drives the cross bar 1242 to rotate. When the cross bar 1242 rotates, the rotating seat 1243 is driven to rotate. When the rotating seat 1243 rotates, the sliding member 1252 gradually moves from the unlocking groove 12432 to the locking groove 12431. In the process of the sliding member 1252 moving from the unlocking groove 12432 to the locking groove 12431, the second elastic element 1255 is compressed, and the first elastic element 1254 is pushed by the inner wall of the sliding member 1252 to push the locking pin 1253, so that the locking pin 1253 is always kept in the state of being extended to the longest. At this time, the locking pin 1253 It is gradually inserted into the locking position 1251, thereby completing the braking of the child stroller. When braking is not needed, the pedal 1256 is pulled up, and the pedal 1256 drives the cross bar 1242 to rotate. When the cross bar 1242 rotates, it drives the rotating seat 1243 to rotate. When the rotating seat 1243 rotates, the sliding member 1252 gradually moves from the locking groove 12431 to the unlocking groove 12432. At this time, the second elastic element 1255 gradually changes from the compressed state to the original state, and pushes the sliding member 1252 to slide. When the sliding member 1252 slides, it drives the locking pin 1253 to move, and the locking pin 1253 gradually disengages from the locking position 1251.

As shown in FIGS. 10 to 12 , the end of the sliding member 1252 is arranged in an arc shape, the locking groove 12431 and the unlocking groove 12432 are both arc grooves, and an inclined sliding surface 12433 capable of abutting against the sliding member 1252 is arranged between the locking groove 12431 and the unlocking groove 12432. The arc shape of the end of the sliding member 1252 facilitates locking with the locking groove 12431 and the unlocking groove 12432, and the arrangement of the inclined sliding surface 12433 also facilitates pushing the sliding member 1252.

As shown in FIGS. 10 to 12, a positioning assembly 126 capable of keeping the brake assembly 125 in a locked state or an unlocked state is further provided between the bottom support seat 1241 and the rotating seat 1243, and the positioning assembly 126 comprises a positioning block 1261 slidably connected to the bottom support seat 1241, and the rotating seat 1243 is provided with a braking position 1262 capable of positioning the brake assembly 125 in a braking state and an unlocking position 1263 capable of positioning the brake assembly 125 in an unlocked state, and an elastic component 1264 capable of pushing the positioning block 1261 to reset is provided between the positioning block 1261 and the bottom support seat 1241. The end surface of the positioning block 1261 is an arc surface.

The positioning assembly 126 can keep the child stroller in a locked state or an unfolded state, and the adult does not need to step on the pedal 1256 all the time. When the rotating seat 1243 rotates, the positioning block 1261 gradually moves from the unlocking position 1263 in the rotating seat 1243 to the braking position 1262, at which time the elastic component 1264 is compressed, and the positioning block 1261 is always locked in the braking position 1262 state, and the entire child stroller is always in a locked state; when the rotating seat 1243 rotates in the opposite direction, the positioning block 1261 gradually moves from the braking position 1262 in the rotating seat 1243 to the unlocking position 1263, at which time the elastic component 1264 moves from the compressed state to the original state, and the positioning block 1261 is pushed by the elastic component 1264 to reset, and the entire child stroller is unlocked from the braking state, and the child stroller can continue to be pushed.

As shown in Fig. 2, the support rod 13 is connected with a push rod 14 which can rotate and unfold relative to the support rod 13 around the tenth axis J. A locking assembly 5 which can lock the support rod 13 and the push rod 14 is provided between the support rod 13 and the push rod 14. The locking assembly 5 is an existing spline lock or the like.

As shown in Fig. 1, the seat assembly 2 also includes a backrest 24 rotatably connected to the seat member 23. The backrest 24 is used for leaning against when the child sits, and the child can be more comfortable when sitting.

As shown in Figure 3, the front leg 11 includes a front leg rod 112, which is provided with a third cross bar 113 connected laterally. The lower end of the front leg rod 112 is also connected to a front wheel connecting seat 114. The front wheel 111 is connected to the front wheel connecting seat 114, and one end of the second transmission rod 32 is connected to the third cross bar 113 by rotating around the ninth axis I.

Claims (10)

1. A child stroller movable from an unfolded position to a folded position upon unlocking a locking device, characterized in that: the bicycle comprises a bottom frame, the bottom frame include front legs (11), front legs (11) on be connected with relative its back leg (12) around first axis (A), the bottom frame on be connected with relative its back leg (13) around second axis (B) pivoted, back leg (13) and bottom frame between be equipped with seat subassembly (2) that can follow rotation folding or rotation expansion when folding or rotation expansion is carried out to back leg (13) relative to bottom frame, seat subassembly (2) include around third axis (C) rotation link lever (21) of being connected on back leg (13), the bottom frame on be connected with relative its connecting seat (22) of being rotatable around fourth axis (D), link lever (21) and connecting seat (22) between still be equipped with seat (23) that can relative two activity, seat (23) and seat (21) between be equipped with seat subassembly (2) that can follow rotation folding or rotation expansion when folding or rotation expansion, seat subassembly (23) still be connected on third axis (C) rotation link lever (21) on the connecting seat (2) around fourth axis (D), seat subassembly (11) can be driven to front leg (11) around front leg (11), the rear legs (12) are connected with rear wheels (121).

2. The stroller of claim 1, wherein: the connecting seat (22) comprises a rotating part (221) which is rotationally connected to the rear leg (12) around a fourth axis (D), a protruding connecting part (222) is arranged on the rotating part (221), a sliding groove (2221) is arranged on the connecting part (222), the seat unit (23) comprises a seat frame (231) which is rotationally connected to the linkage rod (21) around a fifth axis (E), and a guide rod (232) which penetrates through the sliding groove (2221) and can slide in the sliding groove (2221) is further arranged on the seat frame (231).

3. The stroller of claim 1, wherein: the transmission assembly (3) comprises a first transmission rod (31) rotationally connected to the rear leg (12) around a sixth axis (F), one end of the first transmission rod (31) is rotationally connected to the seat (23) or the linkage rod (21) around a seventh axis (G), the front leg (11) is rotationally connected with a second transmission rod (32) around an eighth axis (H), and the other end of the second transmission rod (32) is rotationally connected with the first transmission rod (31) around a ninth axis (I).

4. The stroller of claim 1, wherein: the locking device comprises a first locking component (41) arranged between the front leg (11) and the rear leg (12), a second locking component (42) capable of locking the front leg (11) and the stay bar (13) is arranged between the stay bar and the front leg (11), and the first locking component (41) can be driven to unlock when the second locking component (42) is unlocked and the stay bar (13) is folded relative to the front leg (11) in a rotating manner.

5. The stroller of claim 4, wherein: the second locking assembly (42) including locating the first shell (421) that rotates on foreleg (11), vaulting pole (13) on be equipped with second shell (422) that rotates, second shell (422) and first shell (421) that rotate on enclose into between and have first movable space (423), second shell (422) and first shell (421) that rotate on all be equipped with first spline groove (424), first movable space (423) in be equipped with first spline (425) that can move relatively, first locking assembly (41) in be equipped with and to push away first spline (425) and make first spline (425) and second rotate first spline groove (424) on shell (422) and the first shell (421) that rotates simultaneously block moving part (415), first spline (425) and second rotate and be equipped with between shell (422) and can first spline (425) lateral sliding and break away from first spline (426) that rotates shell (422) on first movable space (423), the top pushing piece (426) that can push away from first push and push wire (14) that can drive between the first push rod (426) and the first push wire (14).

6. The stroller of claim 5, wherein: the second rotating shell (422) is provided with a plurality of first pushing protrusions (4221), the first pushing protrusions (4221) are provided with first pushing surfaces (4222), the first pushing members (426) are provided with first containing grooves (4261) capable of containing the first pushing protrusions (4221), and the first pushing members (426) are provided with second pushing surfaces (4262) which are located at the first containing grooves (4261) and can be matched with the first pushing surfaces (4222) to push the first pushing members (426) to slide transversely.

7. The stroller of claim 5, wherein: the first locking assembly (41) comprises a first connecting shell (411) arranged on a rear leg (12), a second connecting shell (412) is arranged on a front leg (11), a second movable space (413) is formed between the second connecting shell (412) and the first connecting shell (411) in a surrounding mode, second spline grooves (414) are formed in the second connecting shell (412) and the first connecting shell (411), the movable part (415) is a second spline which is arranged in the second movable space (413) and can move relative to the second spline, an elastic part (416) which can enable the second spline to be simultaneously clamped with the second spline grooves (414) on the second connecting shell (412) and the first connecting shell (411) is arranged between the second spline grooves (412), a plurality of through holes (4121) which can be communicated with the second movable space (413) and the first movable space (423) are formed in the second connecting shell (412), and the first spline (4121) can be separated from the second spline grooves (425) through the second spline grooves (425) in a sliding mode.

8. A stroller according to claim 3, wherein: the rear leg (12) include around first axis (A) rotate rear leg pole (122) of being connected on preceding leg (11), rear leg pole (122) on be connected with first horizontal pole (123) of horizontal support, end connection of rear leg pole (122) have second support frame (124) of horizontal connection, rear wheel (121) connect on second support frame (124), rear wheel (121) and second support frame (124) between be equipped with brake subassembly (125), first transfer line (31) rotate around sixth axis (F) and be connected on first horizontal pole (123).

9. The stroller of claim 8, wherein: the second support frame (124) comprises a bottom support seat (1241) connected with a rear wheel (121), the bottom support seat (1241) is connected with a cross rod (1242) which can transversely extend relative to the bottom support seat, the cross rod (1242) is also connected with a rotating seat (1243) which is movably connected with the bottom support seat (1241), the rotating seat (1243) is fixedly connected with the cross rod (1242) and rotates along with the cross rod (1242) when the cross rod (1242) rotates, the cross rod (1242) is rotationally connected with the bottom support seat (1241), the brake assembly (125) comprises a plurality of locking positions (1251) arranged on the rear wheel (121), the bottom support seat (1241) is provided with a sliding piece (1252) which can slide relative to the cross rod, the sliding piece (1252) is internally provided with a locking pin (1253) which can slide relative to the sliding piece and is clamped into the locking positions (1251), the sliding piece (1253) is provided with a second pushing element (1254) which can reset between the sliding piece (1252) and a second pushing element (1252), the rotary seat (1243) is circumferentially provided with a locking groove (12431) capable of pushing the sliding part (1252) to enable the locking pin (1253) to be clamped into the locking position (1251) and an unlocking groove (12432) capable of enabling the locking pin (1253) to be separated from the locking position (1251) for the sliding part (1252), and the brake assembly (125) further comprises a pedal (1256) fixedly connected to the cross rod (1242).

10. The stroller of claim 9, wherein: the bottom support seat (1241) and rotate and still be equipped with between seat (1243) and can make brake subassembly (125) keep locating component (126) at locking state or unblock state, locating component (126) including locating piece (1261) on bottom support seat (1241) sliding connection, rotation seat (1243) on be equipped with brake position (1262) that can fix a position brake subassembly (125) in braking state and can fix a position brake subassembly (125) in unblock position (1263) of unblock state, locating piece (1261) and bottom support seat (1241) between be equipped with elastomeric element (1264) that can push for locating piece (1261) to reset.