CN116714657A - a stroller for children - Google Patents

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

a stroller for children

【Technical field】

The present invention relates to the field of children's strollers, and in particular to a children's stroller.

【Background technique】

Children's strollers have become an indispensable product in the growth process of infants and young children. Many strollers currently on the market include a foldable stroller frame and a seat assembly connected to the stroller frame.

During the folding process of current strollers, the backrest of the seat assembly is usually operated to unlock, and the backrest is rotated toward the seat to unlock the seat, and then the entire seat frame is rotated toward the front legs, and then the seat frame is retracted. Rotate toward the rear legs to link the stroller frame release lock and fold the stroller frame; however, the center of gravity of the stroller is basically between the front legs and the rear legs. When folding the stroller, if the seat assembly If the front legs are folded and the push rod is moved closer to the rear legs, most of the weight of the stroller will be concentrated on or near the front legs. At this time, the front legs and seat components cannot automatically rotate and fold relative to the rear legs and require manual operation by an adult. Only in this way can the overall folding of the stroller be completed, and the folding operation is not very convenient.

For this reason, the present invention is researched and proposed to address the above problems.

[Content of the invention]

The object of the present invention is to overcome the deficiencies of the prior art and provide a children's stroller that is easy to unlock and fold.

The present invention is achieved through the following technical solutions:

A children's stroller has a retractable bottom support frame 1. The bottom support frame 1 includes 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 legs 12 are connected, the upper part of the bottom support frame 1 is rotatably connected to a connecting seat 2, and the connecting seat 2 is rotatably connected to a push rod assembly 3;

There is a first locking component 51 between the upper ends of the front leg 11 and the rear leg 12 that can lock them relative to each other. There is a second locking component 51 that can lock them relative to each other between the push rod component 3 and the connecting seat 2. Locking component 52, the connecting base 2 is provided with a first unlocking component 53 for linking the first locking component 51 and the second locking component 52 to release the lock accordingly;

The connecting base 2 is also connected to a foldable seat assembly 4 that can follow the connecting base 2 to rotate relative to the bottom support frame 1 to switch the forward mode and the rearward mode. The seat assembly 4 includes a seat portion 41 and an armrest. The backrest part 42 and the backrest part 43 are provided with a fourth locking component 56 for locking the backrest part 43 relative to the seat part 41 between the backrest part 43 and the seat part 41. The backrest part 43 is provided with a fourth locking component 56 for locking the backrest part 43 relative to the seat part 41. 56 for unlocking the backrest. A fifth locking component 57 for locking the armrest 42 relative to the seat 41 is provided between the armrest 42 and the seat 41 . There is a sixth locking component 58 for locking the seat portion 41 relative to the connecting base 2;

When the seat assembly 4 is in the rear-facing mode, the fourth locking assembly 56 is first released so that the backrest 43 moves closer to the seat 41 and is folded to a preset angle. The fifth locking assembly 57 is released in conjunction with the armrest. The armrest portion 42 rotates and folds toward the seat portion 41 , the armrest portion 42 rotates toward the seat portion 41 and folds to a preset angle, and then the sixth locking component 58 is linked to release the lock, so that the seat portion 41 rotates toward the rear leg 12 relative to the connecting seat 2 and when the seat part 41 is rotated and folded relative to the connecting base 2 toward the rear leg 12, the seat part 41 links the first unlocking component 53 to unlock the first locking component 51 and the second locking component 52 accordingly, and push the The rod assembly 3 rotates relative to the connecting base 2 and is folded toward the rear leg 12. When the push rod assembly 3 rotates to the preset angle, it links the front leg 11 so that the push rod assembly 3 and the front leg 11 move toward the rear leg 12. Fold close together.

Between the push rod assembly 3 and the front leg 11, the push rod assembly 3 rotates and folds toward the rear leg 12 to a preset angle relative to the connecting seat 2, so that the push rod assembly 3 and the front leg 11 move to the rear leg 12 synchronously. Close the folded linkage component 6.

The push rod assembly 3 is provided with a second unlocking assembly 54 that can unlock the second locking assembly 52. There is a second unlocking assembly 54 between the bottom support frame 1 and the connecting base 2 that can relatively lock the two to prevent the connecting base 2 and the connecting base 2. The seat assembly 4 rotates the reversed third locking assembly 55 relative to the bottom support frame 1, and when the second locking assembly 52 is unlocked, the push rod assembly 3 can rotate upward to a preset angle relative to the connecting base 2 to unlock the third locking assembly 55. Unlocked.

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. The connecting base 2 is rotatably connected to the mounting base 122. The linkage component 6 includes a sliding member 61 slidably connected in the mounting base 122. The sliding member 61 is provided with a driven tooth portion 611 at the rear end. The sliding member 61 A linkage piece 62 is pivotally connected between the front end and the front leg 12 and can rotate relative to the two. A rotating piece 63 is connected to the push rod assembly 3 and is located in the connecting seat 2 in a synchronous manner. The rotating piece 63 is provided with a When it rotates to a preset angle, the driving tooth portion 64 can engage with the driven tooth portion 611 so that the push rod assembly 3 and the front leg 11 can synchronously move toward and fold the rear leg 12 .

The push rod assembly 3 includes a rotating base 31 that is rotatably connected to the connecting base 2. A rotating rod 32 is synchronously connected between the two rotating bases 31. A support rod 33 is also connected to the rotating base 31. , the support rod 33 is connected with a hand push rod 34, the second locking component 52 includes a left connecting shell 521 and a right connecting shell 522 respectively provided on the connecting base 2, the left connecting shell 521 and the rotating base 31 And an accommodation space is formed between the right connecting shell 522 and the rotating base 31 and is provided with a spline groove 523. The accommodation space is movably provided with a spline 524 for engaging with the spline groove 523. There is also a spline return member 525 between the key 524 and the rotating base 31. The first unlocking component 53 includes a sliding block 531 slidably connected in the connecting base 2. The sliding block 531 is provided with a protruding protrusion on the side. Block 5311, the side of the spline 524 is correspondingly provided with a groove 5241 that matches the convex block 5311, the convex block 5311 is provided with a first inclined sliding surface 5312, the groove 5241 is provided with a The first oblique sliding surface 5312 cooperates to cause the protrusion 5311 to push the spline 524 away from the second oblique sliding surface 5242 of the spline groove 523 on the left connecting shell 521 and the right connecting shell 522. The seat part 41 is provided with a When it rotates relative to the connecting base 2, it can push the pushing surface 532 on which the sliding block 531 slides. There is a pushing block elastic member 533 between the sliding block 531 and the connecting base 2 for pushing the sliding block 531 to reset.

The rear leg 12 includes 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 first locking component 51 includes a lock pin 511 provided on the upper part of the front leg 11 and a hook 512 rotatably provided on the mounting base 122 for locking cooperation with the lock pin 511. The hook 512 and There is a hook elastic member 513 between the mounting bases 122 that can push the hook 512 back so that the hook 512 remains locked on the lock pin 511. The first unlocking component 53 also includes a sliding connection inside the mounting base 122. And when the sliding block 531 slides downward, the pushing hook 512 rotates and disengages from the pushing block 534 of the lock pin 511 .

The rear leg 12 includes 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 includes a rotating rod 32 that can relatively rotate laterally through the rotating sleeve 555. The third locking assembly 55 includes a sleeve 554, a rotating sleeve 555 and a locking member 553. The sleeve 554 is relatively fixedly installed on the mounting base 122. The rotating sleeve 555 is rotatably connected to the sleeve 554. The connecting base 2 is rotatably connected to the mounting base 122 through the rotating sleeve 555. The front side of the sleeve 554 is provided with a first locking groove 551 along the axial direction. The locking member 553 is provided in the rotating sleeve 555 and is connected with the rotating rod 32 simultaneously. The front and rear sides of the rotating sleeve 555 are An escape slot 556 is provided in the axial direction, and a limiting wall 557 is formed on the rear side of the sleeve 554 so that the locking member 553 can only rotate and tilt toward the rear leg 12; when the push rod assembly 3 is turned upward to the preset angle At this time, the locking member 553 rotates with the rotating rod 32 and disengages from the first locking groove 551, the connecting base 2 and the mounting base 122 are unlocked, and the seat assembly 4 can rotate with the connecting base 2 and change directions.

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 the depth of the first locking groove 551 . The limiting wall is formed in the second locking groove 552 bottom to restrict the lower part of the locking member 553 from protruding from the rear side of the sleeve 554, so that the locking member 553 can only rotate and tilt in the direction of the rear leg 12.

The second unlocking component 54 includes a first unlocking piece 541 provided on the hand push rod 34. The second unlocking component 54 also includes a spline 524 connected to the spline 524 to drive the spline 524 to correspond to the left connecting shell 521 and the left connecting shell 521. The spline groove 523 on the right connecting shell 522 separates the pull rod 542. The end of the pull rod 542 is connected to a pulling member 543. A push rod unlocking linkage 544 is provided between the pulling member 543 and the first unlocking member 541. .

The fourth locking component 56 includes an adjustment latching position 561 provided on the seat part 41. The backrest 43 is provided with a locking piece 562 that can be movably inserted into the adjustment latching position 561. The backrest 43 is provided with an elastic top. Push the locking part 562 to engage the backrest adjustment locking elastic part 563 of the corresponding adjustment position 561. A backrest unlocking linkage part 565 that can drive the locking part 562 to slide is provided between the backrest unlocking part 564 and the locking part 562.

The fifth locking component 57 includes an armrest locking hole 571 provided on the armrest portion 42. The seat portion 41 is provided with an armrest locking piece 572 that can be movably inserted into the armrest locking hole 571. One end of the armrest locking piece 572 is provided with The backrest portion 43 is capable of extending into the backrest portion 43. The backrest portion 43 is also provided with an armrest linkage unlocking portion 574. When the backrest portion 43 rotates to a preset angle relative to the seat portion 41, the armrest linkage unlocking portion 574 presses against the backrest portion 43. The armrest locking part 572 is pushed against the armrest locking part 573 to disengage from the armrest locking hole 571 for unlocking. There is an armrest locking part between the armrest locking part 572 and the seat part 41 to keep the armrest locking part 572 locked into the armrest locking hole 571 Elastic part 575.

The sixth locking component 58 includes a seat locking hole 581 provided on the connecting base 2. The bottom of the seat portion 41 is provided with a seat locking pin 582 that can be movably inserted into the seat locking hole 581. The seat locking pin 582 is connected to the seat locking hole 581. There is a seat unlocking linkage 583 between the armrest locking parts 572 to link the seat locking pin 582 to move away from the seat locking hole 581 when the armrest locking part 572 moves away from the armrest locking hole 571. The seat locking pin 582 and the seat part 41 There is a seat lock elastic member 584 for elastically pressing the seat lock pin 582 to keep it extended.

The rear leg 12 includes a mounting base 122 and a rear leg rod 123 connected to the mounting base 122. The front leg 11 is rotatably connected to the mounting base 122, and the connecting base 2 is rotatably connected to the mounting base 122. A torsion spring 7 is provided between the front leg 11 and the mounting base 122 to assist the front leg 11 to automatically close and fold toward the rear leg 12 after the front leg 11 is unlocked.

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

1. When it is necessary to fold the stroller, adjust the seat assembly to the rear-facing mode, then unlock the fourth locking assembly through the backrest unlocking piece, push the backrest to rotate toward the seat, and then rotate the backrest toward the seat. During the process, the backrest unlocks the fifth locking component. At this time, the armrest rotates toward the seat under its own weight. The armrest unlocks the sixth locking component during the rotation toward the seat. At this time, the seat can The relative connection base rotates and the rear leg rotates closer to the rear leg. When the seat assembly rotates closer to the rear leg, the seat portion pushes the unlocking assembly to unlock the second locking assembly and the first locking assembly. At this time, the push rod assembly rotates relative to the connecting base. And move closer to the rear legs. At this time, the front legs also rotate closer to the rear legs. When folding, the present invention only needs to adjust the seat assembly to the rearward mode and then push the backrest to rotate and fold. The entire folding and unlocking process is very smooth. , the operation is very convenient.

2. The drive component allows the push rod component to drive the front legs to rotate and move closer to the rear legs when the push rod component rotates to a certain angle. At this time, there is no need to hold the stroller, the rear legs and the push rod component when the entire stroller is folded. The stroller can be made to stand, and adults only need to push the backrest to rotate toward the seat to complete the folding of the stroller.

[Picture description]

Figure 1 is a perspective view of a children's stroller according to the present invention;

Figure 2 is a side view of the children's stroller of the present invention;

Figure 3 is a state diagram when the push rod of the children's stroller of the present invention is in a vertical position;

Figure 4 is a state diagram of the child stroller seat assembly, mounting base and push rod assembly during reversal according to the present invention;

Figure 5 is a perspective view of the seat assembly, mounting base and push rod assembly of the child stroller of the present invention when they are reversed;

Figure 6 is a state diagram of the child stroller seat assembly, mounting base and push rod assembly of the present invention when the direction is completed;

Figure 7 is a perspective view of the driving assembly in the children's stroller of the present invention;

Figure 8 is a cross-sectional view of the third locking component in the stroller of the present invention in its original state;

Figure 9 is a cross-sectional view of the third locking component in the stroller of the present invention when the push rod component is in a vertical position;

Figure 10 is a cross-sectional view of the third locking component in the children's stroller of the present invention when the push rod assembly is in a vertical position and the stroller seat assembly, mounting base and push rod assembly are reversed;

Figure 11 is a cross-sectional view of the third locking assembly when the push rod assembly in the children's stroller of the present invention is in a vertical position and the stroller seat assembly, mounting base and push rod assembly have completed the reversal;

Figure 12 is one of the exploded views of the second locking component and the second unlocking component in the stroller of the present invention;

Figure 13 is the second exploded view of the second locking component and the second unlocking component in the stroller of the present invention;

Figure 14 is an exploded view of the second locking component, the second unlocking component and the first locking component in the stroller of the present invention;

Figure 15 is a perspective view of the splines and sliding blocks in the children's stroller of the present invention;

Figure 16 is one of the exploded views of the splines and sliding blocks in the children's stroller of the present invention;

Figure 17 is the second exploded view of the splines and sliding blocks in the children's stroller of the present invention;

Figure 18 is a perspective view of the driving assembly in the children's stroller of the present invention;

Figure 19 is a state diagram of the driving assembly when the front legs are folded in the children's stroller of the present invention;

Figure 20 is one of the exploded views of the fourth locking assembly, the fifth locking assembly and the sixth locking assembly in the children's stroller of the present invention;

Figure 21 is the second exploded view of the fourth locking assembly, the fifth locking assembly and the sixth locking assembly in the children's stroller of the present invention;

Figure 22 is the third exploded view of the fourth locking assembly, the fifth locking assembly and the sixth locking assembly in the children's stroller of the present invention;

Figure 23 is an exploded view of the seventh locking structure in the children's stroller of the present invention.

【Detailed ways】

The present invention will be further described below in conjunction with the accompanying drawings:

As shown in Figures 1 to 23, the present invention provides a children's stroller with a retractable bottom support frame 1, characterized in that the bottom support frame 1 includes a front leg 11 with a front wheel 111 and a rear wheel 121 The rear legs 12, the front legs 11 are rotatably connected to the rear legs 12 around the first axis A, the upper part of the bottom support frame 1 is rotatably connected to a connecting seat 2, the connecting seat 2 is connected around a second axis B is rotatably connected with a push rod assembly 3;

There is a first locking component 51 between the upper ends of the front leg 11 and the rear leg 12 that can lock them relative to each other. There is a second locking component 51 that can lock them relative to each other between the push rod component 3 and the connecting seat 2. Locking component 52, the connecting base 2 is provided with a first unlocking component 53 for linking the first locking component 51 and the second locking component 52 to release the lock accordingly;

The connecting base 2 is also connected to a foldable seat assembly 4 that can follow the connecting base 2 to rotate relative to the bottom support frame 1 to switch the forward mode and the rearward mode. The seat assembly 4 includes a foldable seat assembly 4 about a third axis C. The seat part 41, the armrest part 42 and the backrest part 43 are rotatably connected to the connection base 2. A fourth locking component is provided between the backrest part 43 and the seat part 41 for locking the backrest part 43 relative to the seat part 41. 56. The backrest portion 43 is provided with a backrest unlocking member 564 for releasing the fourth locking assembly 56, and a third locking member 564 for locking the armrest portion 42 relative to the seat portion 41 is provided between the armrest portion 42 and the seat portion 41. Five locking components 57. A sixth locking component 58 is provided between the seat part 41 and the connecting base 2 for locking the seat part 41 relative to the connecting base 2;

When the seat assembly 4 is in the rear-facing mode, the fourth locking assembly 56 is first released so that the backrest 43 moves closer to the seat 41 and is folded to a preset angle. The fifth locking assembly 57 is released in conjunction with the armrest. The armrest portion 42 rotates and folds toward the seat portion 41 , the armrest portion 42 rotates toward the seat portion 41 and folds to a preset angle, and then the sixth locking component 58 is linked to release the lock, so that the seat portion 41 rotates toward the rear leg 12 relative to the connecting seat 2 and when the seat part 41 is rotated and folded relative to the connecting base 2 toward the rear leg 12, the seat part 41 links the first unlocking component 53 to unlock the first locking component 51 and the second locking component 52 accordingly, and push the The rod assembly 3 rotates relative to the connecting base 2 and is folded toward the rear leg 12. When the push rod assembly 3 rotates to the preset angle, it links the front leg 11 so that the push rod assembly 3 and the front leg 11 move toward the rear leg 12. Fold close together. The seat assembly 4 can be rotated and folded relative to the connecting base 2 only when the seat assembly 4 faces rearward.

When it is necessary to fold the stroller, adjust the seat assembly 4 to the rear-facing mode, then unlock the fourth locking assembly 56 through the backrest unlocking piece 564, push the backrest 43 to rotate closer to the seat 41, and move the backrest 43 toward the seat. When the armrest portion 41 rotates closer to the seat portion 41, the backrest portion 43 unlocks the fifth locking component 57. At this time, the armrest portion 42 rotates closer to the seat portion 41 under its own weight. The six locking components 58 are unlocked. At this time, the seat portion 41 can rotate relative to the connecting base 2 and rotate closer to the rear legs 12 . When the seat component 4 rotates closer to the rear legs 12 , the seat portion 41 pushes the unlocking component 53 so that When the second locking component 52 and the first locking component 51 are unlocked, the push rod component 3 rotates relative to the connecting seat 2 and moves closer to the rear leg 12. At this time, the front leg 11 also rotates closer to the rear leg 12. The present invention only needs to It is necessary to adjust the seat assembly 4 to the rear-facing mode and then push the backrest 43 to rotate and fold. The entire folding and unlocking process is very smooth and the operation is very convenient. During the folding process of the present invention, when the seat assembly 4 moves closer to the rear legs 12, the push rod assembly 3 also moves closer to the rear legs 12. At this time, the weight of the entire stroller is close to the rear legs 12, and the rear legs 12 are It can be used as a fulcrum. When the push rod assembly 3 and the rear legs 12 are in contact with the ground at the same time, the entire stroller can stand on its own through the push rod assembly 3 and the rear legs 12 when folded. At this time, the front legs 11 can face each other. The rear legs 12 rotate and automatically move closer to the rear legs 12, and the children's stroller of the present invention can automatically close the stroller, and the entire folding operation is very simple.

Between the push rod assembly 3 and the front leg 11, the push rod assembly 3 rotates and folds toward the rear leg 12 to a preset angle relative to the connecting seat 2, so that the push rod assembly 3 and the front leg 11 move to the rear leg 12 synchronously. Close the folded linkage component 6. The linkage assembly 6 enables the push rod assembly 3 to drive the front legs 11 to rotate closer to the rear legs 12 when the push rod assembly 3 rotates at a certain angle. At this time, there is no need to hold the stroller when the entire stroller is folded. The rear legs 12 and the push rod assembly 3 can make the stroller stand. The adult only needs to operate and push the backrest portion 43 to rotate toward the seat portion 41 to complete the whole process. The folding of the car.

The push rod assembly 3 is provided with a second unlocking assembly 54 that can unlock the second locking assembly 52. There is a second unlocking assembly 54 between the bottom support frame 1 and the connecting base 2 that can relatively lock the two to prevent the connecting base 2 and the connecting base 2. The seat assembly 4 rotates the reversed third locking assembly 55 relative to the bottom support frame 1, and when the second locking assembly 52 is unlocked, the push rod assembly 3 can rotate upward to a preset angle relative to the connecting base 2 to unlock the third locking assembly 55. Unlocked. The present invention can perform front and rear reversal of the seat assembly 4, and when the second unlocking assembly 54 unlocks the second locking assembly 52, the push rod assembly 3 can rotate relative to the connecting base 2, and at this time the push rod assembly 3 can move from the deployed position. to the vertical position. When the push rod assembly 3 moves from the deployed position to the vertical position, the third locking assembly 55 is unlocked. At this time, the connecting base 2 and the seat assembly 4 can rotate relative to the bottom support 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 around the first axis A. 122, the connecting base 2 is rotatably connected to the mounting base 122. The installation base 122 is arranged to facilitate the connection between the connecting base 2 and the front leg 11 .

The linkage component 6 includes a sliding member 61 that is slidably connected in the mounting base 122 and has one end rotatably connected to the upper end of the front leg 11. The rear end of the sliding member 61 is provided with a plurality of driven tooth portions 611. The front end of the sliding member 61 There is a linkage piece 62 connected to the front leg 12 that can rotate relative to the two. The push rod assembly 3 is connected to a plurality of rotating pieces 63 that can rotate relative to the push rod assembly 3 and is located in the connecting seat 2. The rotating piece 63 has There are a plurality of driving tooth portions 64 that can engage and transmit with the driven tooth portion 611 when they rotate to a preset position. When the push rod assembly 3 is unlocked and rotates to the preset position relative to the mounting base 122 by its own gravity, the driving teeth 64 on the rotating pieces 63 and the driven teeth 611 on the sliding member 61 interact with each other. At this time, the sliding member 61 and the linkage piece 62 are pushed forward and move forward. The linkage piece 62 rotates relative to the front end of the sliding member 61 and the upper end of the front leg 11, thereby driving the front leg 11 and the push rod assembly 3 to the rear leg at the same time. 12Turn closer.

The push rod assembly 3 includes a rotating base 31 that is rotatably connected to the connecting base 2. The rotating base 31 is connected to a rotating rod 32 that passes through the connecting base 2 laterally. The rotating base 31 is also connected to a support rod 33. , the support rod 33 is connected with a hand push rod 34 that can slide and telescope relative to it. The second locking component 52 includes a left connection shell 521 provided on the connection base 2 and a right connection shell provided on the rotating base 31 522. A sealed space is enclosed between the left connecting shell 521 and the right connecting shell 522. The sealed space is provided with a spline groove that can move laterally within the left connecting shell 521 and the right connecting shell 522. 523 engages the spline 524 at the same time. There is also a spline reset part 525 between the spline 524 and the right connection shell 522. The first unlocking component 53 includes a sliding block 531 slidably connected in the connection base 2. The sliding block 531 is provided with a protruding protrusion 5311, the spline 524 is provided with a groove 5241 that can accommodate it, the protrusion 5311 is provided with a first inclined sliding surface 5312, the groove 5241 There is a second inclined sliding surface 5242 that can cooperate with the first inclined sliding surface 5312 to push the spline 524 away from the spline groove 523 on the left connecting shell 521. The seat portion 41 is provided with an opposite connecting seat 2 The pushing surface 532 can push the sliding block 531 when rotating. There is a pushing block elastic member 533 between the sliding block 531 and the connecting base 2 that can push the sliding block 531 back. When the seat part 41 rotates relative to the connecting base 2, the pushing surface 532 on the seat part 41 pushes against the sliding block 531, and the first inclined sliding surface 5312 on the protrusion 5311 of the sliding block 531 pushes against the upper spline groove 523. The second inclined sliding surface 5242 pushes the spline 524 from the left connecting shell 521 into the right connecting shell 522. At this time, the second locking component 52 is unlocked, and the push rod assembly 3 can rotate relative to the connecting seat 2. The hind legs 12 rotated closer together.

The first locking component 51 includes a locking pin 511 provided on the upper part of the front leg 11 and a hook 512 rotatably provided on the mounting base 122 for locking cooperation with the locking pin 511. The hook 512 is in contact with the mounting base 122. There is a hook elastic member 513 between 122 that can push the hook 512 back so that the hook 512 remains locked on the lock pin 511. The first unlocking component 53 also includes a sliding connection in the mounting base 122 and when When the sliding block 531 slides downward, the pushing hook 512 rotates and disengages from the pushing block 534 of the lock pin 511 . When the sliding block 531 is pushed by the pushing surface 532 and slides downward relative to the connecting base 2, the sliding block 531 pushes the pushing block 534 to move downward. When the pushing block 534 moves downward, it pushes the hook. 512, the front end of the hook 512 rotates relative to the mounting base 122. At this time, the hook 512 is separated from the lock pin 511 on the front leg 11, and the top of the front leg 11 is pushed by the sliding member 61. The front legs 11 rotate around the first axis A relative to the mounting base 122 and move closer to the rear leg rod 123 .

The third locking assembly 55 includes a sleeve 554, a rotating sleeve 555 and a locking member 553. The sleeve 554 is relatively fixedly installed on the mounting base 122, and the rotating sleeve 555 is rotatably connected to the sleeve. The connecting seat 2 is rotatably connected to the mounting seat 122 through a rotating sleeve 555. The front side of the sleeve 554 is provided with a first locking groove 551 along the axial direction. The locking member 553 It is provided in the rotating sleeve 555 and is connected with the rotating rod 32 in synchronism. The front and rear sides of the rotating sleeve 555 are provided with escape slots 556 along the axial direction. The rear side of the sleeve 554 forms a limiting blocking wall 557. The locking member 553 can only rotate and tilt in the direction of the rear leg 12; when the push rod assembly 3 is flipped upward to the preset angle, the locking member 553 rotates with the rotating rod 32 and disengages from the first locking groove 551, and the connecting base 2 and The mounting base 122 is unlocked, and the seat assembly 4 can rotate and change direction along with the connecting base 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 the depth of the first locking groove 551. A limiting wall 557 is formed in the second locking groove. 552 bottom to restrict the lower part of the locking member 553 from protruding from the rear side of the sleeve 554, so that the locking member 553 can only rotate and tilt in the direction of the rear leg 12.

The locking member 553 includes a locking piece 5531 that can be inserted into the first locking groove 551, and the locking piece 5531 is connected with an engaging protrusion 5532 that can be inserted into the second locking groove 552. , the depth of the second locking groove 552 is smaller than the depth of the first locking groove 551, so that when the push rod assembly 3 rotates from the deployed position to the vertical position, the bottom of the locking member 553 is in contact with the mounting base 122. The limiting walls 557 on the same side of the second locking groove 552 abut against each other. When the push rod assembly 4 is in the unfolded state, the locking piece 5531 and the engaging protrusion 5532 are respectively engaged in the first locking groove 551 and the second locking groove 552. At this time, the connecting base 2 cannot be relative to the mounting base 122. Turn to reverse. When the push rod assembly 4 rotates upward from the rotating state to the vertical state, the locking piece 5531 and the engaging protrusion 5532 are separated from the first locking groove 551 and the second locking groove 552 respectively. Due to the setting of the limiting blocking wall 557 , so that the push rod assembly 4 stays in the vertical position or close to the vertical position, and allows the push rod assembly 4 to only rotate back and forth in one direction, and prevents the push rod assembly 4 from continuing to rotate forward after reaching the vertical position.

The second unlocking component 54 includes a first unlocking piece 541 provided on the push rod 34. The second unlocking component 54 also includes a first unlocking component 541 connected to the spline 524 and capable of pulling the spline 524 to connect with the left side when pulled. There are a plurality of pull rods 542 separated by spline grooves 523 on the shell 521. The ends of the plurality of pull rods 542 are connected with pulling parts 543 that can drive the splines 524 to slide when sliding. The pulling parts 543 and the first unlocking part There is a push rod unlocking linkage 544 between the push rods 541 . When only the rotation direction of the seat assembly 4 and the mounting base 2 is required, the first unlocking part 541 is operated. After the first unlocking part 541 is operated, the push rod unlocking linkage 544 is pulled, and the push rod unlocking linkage 544 drives the pull. Part 543 slides laterally. When the pulling part 543 slides laterally, it drives the pull rod 542 and then drives the spline 524 to slide and separate the spline 524 from the spline groove 523 on the left connecting shell 521. At this time, the push rod assembly 3 can move from the deployed position to the vertical position. straight position.

The fourth locking component 56 includes an adjustment latching position 561 provided on the seat part 41. The backrest 43 is provided with a locking piece 562 that can be movably inserted into the adjustment latching position 561. The backrest 43 is provided with an elastic top. Push the locking part 562 to engage the backrest adjustment locking elastic part 563 of the corresponding adjustment position 561. A backrest unlocking linkage part 565 that can drive the locking part 562 to slide is provided between the backrest unlocking part 564 and the locking part 562. When the position of the backrest part 43 relative to the seat part 41 needs to be adjusted, the backrest unlocking part 564 is operated. After the backrest unlocking part 564 is operated, the backrest unlocking linkage part 565 is driven to move. When the backrest unlocking linkage part 565 moves, the locking part 562 is driven to slide. After being disengaged from the adjusting position 561, the gear can be adjusted by turning the backrest part 43. When the backrest part 43 is adjusted in place relative to the seat part 41, release the backrest unlocking part 564, and the backrest adjustment locking elastic part 563 pushes up. The locking part 562 and the adjustment locking position 561 are locked again, and now the seat part 41 and the backrest part 43 are locked here. When it is necessary to fold the seat assembly 4, first unlock the fourth locking assembly 56, and then push the backrest portion 43 to rotate closer to the seat portion 41.

The fifth locking component 57 includes an armrest locking hole 571 provided on the armrest portion 42. The seat portion 41 is provided with an armrest locking piece 572 that can be movably inserted into the armrest locking hole 571. One end of the armrest locking piece 572 is provided with The backrest portion 43 is capable of extending into the backrest portion 43. The backrest portion 43 is also provided with an armrest linkage unlocking portion 574. When the backrest portion 43 rotates to a preset angle relative to the seat portion 41, the armrest linkage unlocking portion 574 presses against the backrest portion 43. The armrest locking part 572 is pushed against the armrest locking part 573 to disengage from the armrest locking hole 571 for unlocking. There is an armrest locking part between the armrest locking part 572 and the seat part 41 to keep the armrest locking part 572 locked into the armrest locking hole 571 Elastic part 575. The armrest linkage unlocking part 574 is a pushing surface provided on the backrest part 43. When the backrest part 43 rotates, the pushing surface on the backrest part 43 pushes the armrest linkage unlocking part 574, and the armrest linkage unlocking part 574 drives the armrest linkage unlocking part 574. The armrest locking part 572 slides relative to the seat part 41 so that the armrest locking part 572 is separated from the armrest locking hole 571. At this time, the armrest part 42 is unlocked. Under the action of its own gravity, the armrest part 42 rotates relative to the seat part 41. Closer.

The sixth locking component 58 includes a seat locking hole 581 provided on the connecting base 2. The bottom of the seat portion 41 is provided with a seat locking pin 582 that can be movably inserted into the seat locking hole 581. The seat locking pin 582 is connected to the seat locking hole 581. There is a seat unlocking linkage 583 between the armrest locking parts 572 to link the seat locking pin 582 to move away from the seat locking hole 581 when the armrest locking part 572 moves away from the armrest locking hole 571. The seat locking pin 582 and the seat part 41 There is a seat lock elastic member 584 for elastically pressing the seat lock pin 582 to keep it extended. When the backrest 43 pushes against the armrest locking part 572 and slides, the armrest locking part 572 pulls the seat unlocking linkage 583 to move. When the seat unlocking linkage 583 moves, it drives the seat lock pin 582 to slide upward relative to the connection base 2 and disengage from the seat locking hole. 581, at this time, the seat portion 41 can rotate relative to the connecting base 2 and rotate closer to the rear leg 12.

A torsion spring 7 is provided between the front leg 11 and the mounting base 122 to assist the front leg 11 to automatically close and fold toward the rear leg 12 after the front leg 11 is unlocked. When the front leg 11 is in the unfolded state, the torsion spring 7 is in a compressed state. When the front leg 11 is folded, the torsion spring 7 moves from the compressed state to the normal state. At this time, the torsion spring 7 exerts thrust on the front leg 11, causing the front leg to 11 automatically rotates towards the rear leg 12.

The mounting base 122 and the rotating base 31 are directly provided with a seventh locking structure 59. The seventh locking structure 59 includes a vertical locking position 591 provided on the rotating base 31 and corresponding to the vertical position. The mounting base 122 is provided with a snap-in block 592 that can slide relative to it and snap into or out of the vertical locking position 591. The snap-in block 592 is provided with a snap-in block 592 that can abut against the wall of the vertical locking position 591 to allow the snap-in block 592 to slide. The arc surface 5921 is provided with a spring 593 between the clamping block 592 and the mounting base 122 to enable the clamping block 592 to return to its original position. The vertical locking position 591 is a groove. When the push rod assembly 3 rotates relative to the connecting base 2 to the vertical state, the clamping block 592 is aligned with the vertical locking position 591, and the spring 593 pushes the clamping block 592 to reset. At this time, the clamping block 592 snaps into the vertical position. Locked within 591.

The mounting base 2 is provided with a positioning pin 21, and the seat portion 41 is provided with a receiving groove 411 that can accommodate the positioning pin 21 when it is unfolded. The receiving groove 411 is provided with a receiving groove 411 that can abut against the positioning pin 21. With the top surface 412, the support between the seat part 41 and the mounting base 2 is more stable and the safety is better.

Claims (13)

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).