Baby stroller

Abstract

The child stroller comprises a stroller frame assembly, the stroller frame assembly comprises front legs and rear legs rotationally connected to the front legs around a first axis, the front legs are provided with front wheels, the rear legs are provided with rear wheels, the rear legs are connected with push rods capable of rotating around a second axis relative to the rear legs, and linkage rods are arranged between the push rods and the front legs; one end of the linkage rod and the front leg rotate around a third axis, the other end of the linkage rod and the push rod are rotationally connected around a fourth axis, a locking assembly capable of keeping the linkage rod at an unfolding position is arranged on the rear leg, a mounting seat is further detachably connected to the frame assembly, and a foldable seat assembly is connected to the mounting seat. The seat assembly is rotationally connected to the mounting base, and when the seat assembly is folded and rotationally gets close to the frame assembly, the locking assembly can be unlocked. In order to overcome the defects in the prior art, the invention provides the baby stroller which is convenient to fold.

Description

[Technical Field]

[0001] This invention relates to a children's stroller. [Background Technology]

[0002] Currently, strollers have become an indispensable item for children during their growth. Most strollers on the market can be folded or unfolded, but existing strollers have complex transmission structures with many linkages, and their size remains relatively large even when folded. Therefore, there is a strong desire for a stroller that is easy to fold and unfold. This invention provides a new stroller structure. [Summary of the Invention]

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a foldable and convenient children's stroller.

[0004] This invention is achieved through the following technical solution:

[0005] A stroller includes a frame assembly 1, which includes a front leg 11 and a rear leg 12 rotatably connected to the front leg 11 about a first axis A. A front wheel 111 is mounted on the front leg 11, and a rear wheel 121 is mounted on the rear leg 12. A push rod 13, rotatable relative to the rear leg 12 about a second axis B, is connected to the rear leg 12. A linkage rod 14 is provided between the push rod 13 and the front leg 11. One end of the linkage rod 14 rotatably connects to the front leg 11 about a third axis C, and the other end of the linkage rod 14 rotatably connects to the push rod 13 about a fourth axis D. A locking component 2 is provided on the rear leg 12 to keep the linkage rod 14 in an unfolded position. A mounting base 3 is detachably connected to the frame assembly 1. A foldable seat assembly 4 is connected to the mounting base 3. The seat assembly 4 is rotatably connected to the mounting base 3, and the locking component 2 is unlocked when the seat assembly 4 is folded and rotates towards the frame assembly 1.

[0006] The seat assembly 4 can be detachably connected to the mounting base 3 from both the forward and rearward positions, and the locking assembly 2 can be unlocked when the seat assembly 4 is folded and rotated toward the frame assembly 1 in either the forward or reverse direction.

[0007] The seat assembly 4 includes a seat rod 41 rotatably connected to the mounting base 3 about a fifth axis E. A backrest rod 42, which can rotate relative to the seat rod 41 and the mounting base 3, is provided between the seat rod 41 and the mounting base 3. An armrest rod 43, which can rotate relative to the backrest rod 42, is also connected to the side of the seat rod 41 away from the backrest rod 42. A first locking assembly 44, which can lock the armrest rod 43 and the seat rod 41, is provided between the backrest rod 42 and the seat rod 41. An adjustment assembly 45, which can adjust the position of the backrest rod 42 relative to the seat rod 41, is provided between the seat rod 41 and the mounting base 3. A second locking assembly 46, which can lock the seat rod 41 and the mounting base 3, is provided between the seat rod 41 and the mounting base 3. When the backrest rod 42 rotates and folds toward the seat rod 41, the backrest rod 42 can unlock the first locking assembly 44 and the second locking assembly 46.

[0008] The adjustment assembly 45 includes multiple adjustment positions 451 disposed on the seat rod 41. The backrest rod 42 is provided with a sliding seat 452 that can slide relative to it. The sliding seat 452 is provided with a pin 4521 that can be engaged into the adjustment position 451. A first elastic element 453 that can push the sliding seat 452 back to its reset position is provided between the sliding seat 452 and the backrest rod 42. The backrest rod 42 is provided with an unlocking element 454 that can rotate relative to it. A cable 455 is provided between the unlocking element 454 and the sliding seat 452. The seat rod 41 is also provided with a locking groove 456 that can lock the backrest rod 42 in a folded position.

[0009] The second locking assembly 46 includes a left housing 461 disposed on the seat rod 41 and a right housing 462 disposed on the mounting base 3. A movable space 463 is formed between the left housing 461 and the right housing 462. Both the left housing 461 and the right housing 462 are provided with slots 464. A locking member 465 that can move laterally relative to the movable space 463 is provided. A second elastic member 466 is provided between the locking member 465 and the left housing 461, which can simultaneously engage the locking member 465 with the slots 464 on the left housing 461 and the right housing 462. The locking member 465 is provided with a protruding protrusion 4651. The backrest rod 42 is provided with a pushing step 467 that can push the protrusion 4651 during the process of rotating and folding the backrest rod 42 toward the seat rod 41, thereby causing the locking member 465 to disengage from the slot 464 on the right housing 462.

[0010] The first locking assembly 44 includes a first locking position 441 disposed on the armrest 43. The seat rod 41 is provided with a locking member 442 that can slide up and down relative to it and engage or disengage from the first locking position 441. A third elastic member 443 is provided between the locking member 442 and the seat rod 41 to keep the locking member 442 locked in the first locking position 441. The armrest 43 is also provided with a relief groove 431 that allows the locking member 442 to slide within it. The relief groove 431 communicates with the first locking position 441. The backrest rod 42 is provided with a pushing part 444 that can push the locking member 442 out of the first locking position 441 and into the relief groove 431 during its rotation and folding process.

[0011] The rear leg 12 is also provided with multiple locking positions 122. The mounting base 3 is provided with a locking plate 31 that can slide relative to it. The locking plate 31 is provided with a locking part 311 that can engage or disengage from the locking position 122. A fourth elastic member 32 that can push the locking plate 31 back to its original position is provided between the locking plate 31 and the mounting base 3. The locking plate 31 is provided with a locking block 33 that can slide downward relative to it. A fifth elastic member 34 is provided between the locking block 33 and the locking plate 31. The rear leg 12 is also provided with a groove 123 that can align with the locking block 33 when the locking plate 31 is pushed to unlock, allowing the locking block 33 to engage.

[0012] The locking assembly 2 includes a first locking position 21 disposed on the push rod 13 and a second locking position 22 disposed on the front leg 11. The rear leg 12 is provided with a slider 23 that can slide relative to it. The slider 23 is provided with a snap-fit ​​part 231 that can simultaneously engage with the first locking position 21 and the second locking position 22. The slider 23 is also provided with a push protrusion 232 that can extend out of the rear leg 12 and be pushed by the seat assembly 4. The rear leg 12 is provided with a guide groove 124 that can guide the push protrusion 232 to slide. The rear leg 12 is also provided with a connecting block 125. A sixth elastic element 24 is provided between the connecting block 125 and the slider 23.

[0013] The push rod 13 is provided with a sliding sleeve 131 that can slide up and down relative to it. The push rod 13 is provided with a pusher 132 that can rotate relative to it and push the slider 23 downward. A seventh elastic member 133 is provided between the pusher 132 and the push rod 13 to push the pusher 132 back to its original position. A puller 134 is provided between the pusher 132 and the sliding sleeve 131.

[0014] The seat post 41 is provided with a push block 411 that can push the push protrusion 232 to move and thus unlock the locking component 2. A return spring 412 is provided between the push block 411 and the seat post 41.

[0015] A first torsion spring 15 is provided between the front leg 11 and the rear leg 12, a second torsion spring 16 is provided between the push rod 13 and the rear leg 12, a rotating plate 51 that can rotate relative to the rear leg 12 is connected to the rear leg 12, a locking groove 511 is provided on the rotating plate 51, a locking member 52 that can be locked into the locking groove 511 when the push rod 13 is rotated and folded into place, and a third torsion spring 53 is provided between the rotating plate 51 and the rear leg 12.

[0016] Compared with the prior art, the present invention has the following advantages: When the present invention needs to be folded, the seat assembly is first changed from the unfolded state to the folded state. When the seat assembly is folded, it rotates relative to the mounting seat and moves toward the frame assembly. During the process of the seat assembly moving toward the frame assembly, the locking component is unlocked, and the frame assembly can then be folded. The push rod is pushed toward the rear legs, and the push rod rotates relative to the rear legs around the second axis. At this time, one end of the linkage rod follows the push rod and rotates relative to the push rod around the fourth axis. When the linkage rod moves with the push rod, it drives the other end to move. At this time, the other end of the linkage rod... The end of the stroller moves the front leg and rotates it around the third axis relative to the front leg, thereby causing the front leg to fold towards the rear leg around the first axis. When the push rod is close to the rear leg and the front leg is close to the rear leg, the frame assembly is folded. At this time, the seat assembly gradually moves closer to the frame assembly, thus completing the folding of the entire stroller. Folding is more convenient. During the folding process of the seat assembly, simply rotate the seat assembly towards the frame assembly to unlock the locking component. Then push the push rod towards the rear leg. Through the linkage of the linkage rod, the front leg moves towards the rear leg, thus completing the folding of the entire stroller. Unlocking and folding are more convenient. [Attached Image Description]

[0017] Figure 1 This is a perspective view of the stroller of the present invention;

[0018] Figure 2 This is a perspective view of the frame assembly of the stroller of the present invention;

[0019] Figure 3 yes Figure 2 A 3D view of region F in the middle;

[0020] Figure 4 This is an exploded view of the rear legs of the stroller of the present invention;

[0021] Figure 5 This is a perspective view of the rear legs, front legs, and push rod of the stroller of the present invention;

[0022] Figure 6 This is one of the perspective views of the locking component of the stroller of the present invention;

[0023] Figure 7 This is a second perspective view of the locking component of the stroller of the present invention;

[0024] Figure 8 This is a perspective view of the slider of the stroller of the present invention;

[0025] Figure 9 This is a perspective view of the mounting base and seat assembly of the stroller of the present invention;

[0026] Figure 10 This is one of the exploded views of the mounting base and seat assembly of the stroller of the present invention;

[0027] Figure 11 This is the second exploded view of the mounting base and seat assembly of the stroller of the present invention;

[0028] Figure 12 This is the third exploded view of the mounting base and seat assembly of the stroller of the present invention;

[0029] Figure 13 This is a perspective view of the seat assembly of the stroller of the present invention;

[0030] Figure 14 This is one of the perspective views of the backrest bar of the stroller of the present invention;

[0031] Figure 15 This is the second perspective view of the backrest bar of the stroller of the present invention;

[0032] Figure 16 This is one of the perspective views of the seat post and armrest post of the stroller of the present invention;

[0033] Figure 17 This is a second perspective view of the seat post and armrest post of the stroller of the present invention;

[0034] Figure 18 This is an exploded view of the seat post and mounting base of the stroller of the present invention;

[0035] Figure 19 This is an exploded view of the push block and return spring of the stroller of the present invention;

[0036] Figure 20 This is a diagram showing the seat assembly of the stroller of the present invention installed in a rear-facing position;

[0037] Figure 21 This is a diagram showing the seat assembly of the stroller of the present invention folded in the forward position;

[0038] Figure 22This is a diagram showing the seat assembly of the stroller of the present invention folded in the forward position after being fully folded.

[0039] Figure 23 This is a diagram showing the seat assembly of the stroller of the present invention folded in a rear-facing position;

[0040] Figure 24 This is a diagram showing the seat assembly of the stroller of the present invention folded in the rear-facing position.

Detailed Implementation Methods

[0041] The present invention will now be further described with reference to the accompanying drawings:

[0042] like Figures 1 to 24 As shown, the present invention provides a child stroller, including a frame assembly 1. The frame assembly 1 includes a front leg 11 and a rear leg 12 rotatably connected to the front leg 11 about a first axis A. A front wheel 111 is provided on the front leg 11, and a rear wheel 121 is provided on the rear leg 12. A push rod 13 that can rotate relative to the rear leg 12 about a second axis B is connected to the rear leg 12. A linkage rod 14 is provided between the push rod 13 and the front leg 11. One end of the linkage rod 14 rotates with the front leg 11 about a third axis C, and the other end of the linkage rod 14 is rotatably connected to the push rod 13 about a fourth axis D. A locking component 2 that can keep the linkage rod 14 in an unfolded position is provided on the rear leg 12. A mounting base 3 is also connected to the frame assembly 1. A foldable seat assembly 4 is connected to the mounting base 3. The seat assembly 4 is rotatably connected to the mounting base 3, and when the seat assembly 4 is folded and rotates towards the frame assembly 1, the locking component 2 can be unlocked.

[0043] When the present invention needs to be folded, the seat assembly 4 is first changed from the unfolded state to the folded state. When the seat assembly 4 is folded, it rotates relative to the mounting base 3 and moves toward the frame assembly 1. During the process of the seat assembly 4 moving toward the frame assembly 1, the locking component 2 is unlocked, and the frame assembly 1 can then be folded. This pushes the push rod 13 toward the rear leg 12. The push rod 13 rotates relative to the rear leg 12 around the second axis B. At this time, one end of the linkage rod 14 follows the push rod 13 and rotates relative to the push rod 13 around the fourth axis D. When the linkage rod 14 moves with the push rod 13, it drives the other end to move. At this time, the other end of the linkage rod 14 drives the front leg 11 to move. The front leg 11 rotates around the third axis C, thereby causing the front leg 11 to fold towards the rear leg 12 around the first axis A. When the push rod 13 and the rear leg 12 are close together and the front leg 11 and the rear leg 12 are close together, the frame assembly 1 is folded. At this time, the seat assembly 4 gradually moves closer to the frame assembly 1, thus completing the folding of the entire stroller. Folding is more convenient. During the folding process of the seat assembly 4, the seat assembly 4 is rotated towards the frame assembly 1 to unlock the locking assembly 2. Then, the push rod 13 is pushed towards the rear leg 12. Through the linkage folding of the linkage rod 14, the front leg 11 moves towards the rear leg 12, thus completing the folding of the entire stroller. Unlocking and folding are more convenient.

[0044] like Figure 1 and Figure 20 As shown, the seat assembly 4 can be detachably connected to the mounting base 3 from both the forward-facing and rear-facing positions. The locking component 2 can be unlocked when the seat assembly 4 is folded and rotated forward or backward toward the frame assembly 1. When the seat assembly 4 is mounted on the mounting base 3 in the forward-facing position, it faces the front of the frame assembly 1. When the seat assembly 4 is mounted on the mounting base 3 in the rear-facing position, it faces the push rod 13. The seat assembly 4 can be folded from both the forward-facing and rear-facing positions. Simultaneously, the locking component 2 can be unlocked during the folding process, making the folding and unlocking of the entire stroller more convenient.

[0045] like Figure 9As shown, the seat assembly 4 includes a seat rod 41 rotatably connected to the mounting base 3 about the fifth axis E. A backrest rod 42, rotatable relative to the seat rod 41 and the mounting base 3, is provided between them. An armrest rod 43, rotatable relative to the backrest rod 42, is also connected to the side of the seat rod 41 away from it. A first locking assembly 44, capable of locking the armrest rod 43 and the seat rod 41, is provided between the backrest rod 42 and the seat rod 41. An adjusting assembly 45, capable of adjusting the position of the backrest rod 42 relative to the seat rod 41, is provided between the seat rod 41 and the mounting base 3, capable of locking the two together. When the backrest rod 42 is rotated and folded toward the seat rod 41, the backrest rod 42 can unlock the first locking assembly 44 and the second locking assembly 46. The rotation axes of the armrest rod 43 and the backrest rod 42 are coaxial with the fifth axis E. The adjustment component 45 can easily adjust the tilt position of the backrest rod 42 relative to the seat rod 41. When the entire seat assembly 4 needs to be folded, first unlock the adjustment component 45, then rotate the backrest rod 42 so that the backrest rod 42 rotates towards the seat rod 41. During this process, the backrest rod 42 gradually unlocks the first locking component 44 and the second locking component 46. After the first locking component 44 and the second locking component 46 are unlocked, the armrest rod 43 rotates relative to the seat rod 41 and moves towards the seat rod 41. After the second locking component 46 is unlocked, the seat rod 41 rotates around the fifth axis E relative to the mounting base 3. At this time, the entire seat assembly 4 gradually completes the folding. During the rotation of the seat rod 41 relative to the mounting base 3, the seat assembly 4 gradually moves towards the frame assembly 1 and unlocks the locking component 2.

[0046] like Figures 12 to 14As shown, the adjustment assembly 45 includes multiple adjustment positions 451 disposed on the seat rod 41. The backrest rod 42 is provided with a sliding seat 452 that can slide relative to it. The sliding seat 452 is provided with a pin 4521 that can engage with the adjustment position 451. A first elastic element 453 is provided between the sliding seat 452 and the backrest rod 42 to push the sliding seat 452 back to its original position. The backrest rod 42 is provided with an unlocking element 454 that can rotate relative to it. A pull cable 455 is provided between the unlocking element 454 and the sliding seat 452. The seat rod 41 is also provided with a locking groove 456 that can lock the backrest rod 42 in a folded position. The adjustment assembly 45 has two modes: a first mode for adjusting the tilt position of the backrest rod 42 relative to the seat rod 41, and a second mode for locking the backrest rod 42 in a folded state. When it is necessary to adjust the tilt position of the backrest rod 42 relative to the seat rod 41, pull the unlocking piece 454. After the unlocking piece 454 is pulled, it drives the cable 455 to move, which in turn causes the cable 455 to drive the sliding seat 452 to move upward. When the sliding seat 452 moves upward, the pin 4521 gradually disengages from the adjustment position 451, and the first elastic element 453 is in a compressed state. At this time, the backrest rod 42 can rotate relative to the seat rod 41 to adjust the tilt position of the backrest rod 42 relative to the seat rod 41. When the adjustment is completed, release the unlocking piece 454, and the first elastic element 453 pushes the sliding seat 452 back to its original position. At this time, the pin 4521 will re-engage into the corresponding adjustment position 451, thus completing the adjustment. When it is necessary to lock the seat in the folded position, pull the unlocking piece 454. After the unlocking piece 454 is pulled, it drives the cable 455 to move, which in turn causes the cable 455 to drive the sliding seat 452 to move upward. When the sliding seat 452 moves upward, the pin 4521 gradually disengages from the adjustment position 451, and the first elastic element 453 is in a compressed state. At this time, the backrest rod 42 rotates toward the seat rod 41. During this process, the unlocking piece 454 can be released. When the backrest rod 42 rotates to the correct position, the pin 4521 aligns with the locking groove 456. At this time, the first elastic element 453 resets and pushes the sliding seat 452 to slide, thereby causing the pin 4521 to insert into the locking groove 456, thus locking the entire seat assembly 4 in the folded state.

[0047] like Figures 10 to 11As shown, the second locking assembly 46 includes a left housing 461 disposed on the seat rod 41 and a right housing 462 disposed on the mounting base 3. A movable space 463 is formed between the left housing 461 and the right housing 462. Both the left housing 461 and the right housing 462 are provided with slots 464. A locking member 465 that can move laterally relative to the movable space 463 is provided. A second elastic member 466 is provided between the locking member 465 and the left housing 461, which can simultaneously engage the locking member 465 with the slots 464 on the left housing 461 and the right housing 462. A protruding protrusion 4651 is provided on the locking member 465. A pushing step 467 is provided on the backrest rod 42, which can push the protrusion 4651 during the process of rotating and folding the backrest rod 42 toward the seat rod 41, thereby causing the locking member 465 to disengage from the slot 464 on the right housing 462. When the backrest bar 42 rotates toward the seat bar 41 and folds, the push step 467 on the backrest bar 42 moves accordingly. The push step 467 gradually contacts the protrusion 4651 and pushes the protrusion 4651 to move. Under the push of the push step 467, the locking piece 465 gradually moves toward the left housing 461 until the locking piece 465 disengages from the slot 464 on the right housing 462. At this time, the second locking assembly 46 is unlocked, and the seat bar 41 can rotate relative to the mounting base 3. Under its own weight, the seat assembly 4 gradually moves toward the frame assembly 1 and folds.

[0048] like Figures 15 to 17 As shown, the first locking assembly 44 includes a first locking position 441 disposed on the armrest 43. The seat rod 41 is provided with a locking member 442 that can slide up and down relative to it and engage or disengage from the first locking position 441. A third elastic member 443 is provided between the locking member 442 and the seat rod 41 to keep the locking member 442 locked in the first locking position 441. The armrest 43 is also provided with a relief groove 431 that allows the locking member 442 to slide within it. The relief groove 431 communicates with the first locking position 441. The backrest rod 42 is provided with a pushing part 444 that can push the locking member 442 out of the first locking position 441 and into the relief groove 431 during its rotation and folding process.

[0049] When the backrest rod 42 rotates and folds towards the seat rod 41, after rotating a certain distance, the pushing part 444 on it gradually contacts the locking member 442. The pushing part 444 pushes the locking member 442 to slide downward relative to the seat rod 41. As the locking member 442 slides downward, it gradually disengages from the first locking position 441 of the armrest rod 43 and gradually enters the clearance groove 431. At this time, the first locking assembly 44 is unlocked, and the armrest rod 43 can gradually rotate and move towards the seat rod 41. Since the pushing part 444 and the pushing step 467 are integrated on the backrest rod 42, the first locking assembly 44 and the second locking assembly 46 can be unlocked when the backrest rod 42 rotates and folds. Of course, in one embodiment, the first locking assembly 44 and the second locking assembly 46 unlock simultaneously; in another embodiment, the first locking assembly 44 and the second locking assembly 46 can unlock sequentially. The seat rod 41 is provided with an arc-shaped groove 47, and the backrest rod 42 is provided with a protruding guide block 48. The guide block 48 extends into the arc-shaped groove 17 and slides along the arc-shaped groove 47.

[0050] like Figures 4 to 8 As shown, the locking assembly 2 includes a first locking position 21 disposed on the push rod 13 and a second locking position 22 disposed on the front leg 11. The rear leg 12 is provided with a slider 23 that can slide relative to it. The slider 23 is provided with a locking part 231 that can simultaneously engage with the first locking position 21 and the second locking position 22. The slider 23 is also provided with a pushing protrusion 232 that can extend out of the rear leg 12 and be pushed by the seat assembly 4. The rear leg 12 is provided with a guide groove 124 that can guide the locking part 231 to slide. The rear leg 12 is also provided with a connecting block 125. A sixth elastic member 24 is disposed between the connecting block 125 and the slider 23. When the seat post 41 rotates relative to the mounting base 3 and folds towards the frame assembly 1, the seat post 41 gradually comes into contact with the push protrusion 232. After being pushed by the seat post 41, the push protrusion 232 causes the slider 23 to slide. The locking part 231 on the slider 23 slides down along the guide groove 124. Under the action of the push protrusion 232, the slider 23 slides down relative to the rear leg 12. At this time, the locking part 231 on the slider 23 gradually disengages from the first locking position 21 on the push rod 13 and the second locking position 22 on the front leg 11. At this time, the locking assembly 2 is unlocked. Pushing the push rod 13 to rotate and fold towards the rear leg 12 allows the entire frame assembly 1 to fold.

[0051] like Figures 6 to 7As shown, the push rod 13 is provided with a sliding sleeve 131 that can slide up and down relative to it. The push rod 13 is provided with a pusher 132 that can rotate relative to it and push the slider 23 downward. A seventh elastic element 133 is provided between the pusher 132 and the push rod 13 to push the pusher 132 back to its original position. A pulling element 134 is provided between the pusher 132 and the sliding sleeve 131. If the frame assembly 1 is not equipped with the mounting base 3 and the seat assembly 4, the sliding sleeve 131 is pushed to slide upward along the push rod 13. When the sliding sleeve 131 slides, it causes the pusher 132 to rotate relative to the push rod 13. At this time, the pusher 132 gradually contacts the slider 23 and pushes the slider 23 downward to unlock it, thereby directly folding the frame assembly 1. Therefore, the present invention provides two selectable unlocking methods. When the seat assembly 4 is connected to the frame assembly 1, the frame assembly 1 can be unlocked by folding the seat assembly 4. When the seat assembly 4 and the mounting base 3 are removed from the frame assembly 1, the frame assembly 1 can be unlocked by sliding the sleeve 131 (this unlocking method is suitable for the scenario where a detachable bassinet is connected to the frame assembly 1).

[0052] like Figure 18 As shown, the rear leg 12 is also provided with multiple locking positions 122. The mounting base 3 is provided with a locking plate 31 that can slide relative to it. The locking plate 31 is provided with a locking part 311 that can engage or disengage from the locking position 122. A fourth elastic member 32 that can push the locking plate 31 back to its original position is provided between the locking plate 31 and the mounting base 3. The locking plate 31 is provided with a locking block 33 that can slide downward relative to it. A fifth elastic member 34 is provided between the locking block 33 and the locking plate 31. The rear leg 12 is also provided with a groove 123 that can align with the locking block 33 when the locking plate 31 is pushed to unlock, allowing the locking block 33 to engage.

[0053] When it is necessary to remove the mounting base 3 and seat assembly 4, press one end of the locking plate 31. The locking plate 31 moves relative to the mounting base 3. At this time, the locking part 311 on the locking plate 31 gradually disengages from the corresponding locking position 122, the lock between the mounting base 3 and the rear leg 12 is released, and the mounting base 3 and seat assembly 4 can be removed from the frame assembly 1 for easy placement. Of course, in one embodiment, a locking block 33 is also provided. When the locking plate 31 moves to a certain position relative to the mounting base 3, the locking block 33 gradually aligns with the groove 123. During this process, the locking block 33 is pushed into the groove 123 by the fifth elastic member 34 until the locking plate 31 is unlocked. Because the groove 123 and the locking block 33 cooperate, the locking plate 31 cannot be reset, and the locking part 311 will not be locked into the locking position 122, so that the mounting base 3 and the rear leg 12 always remain in the unlocked state, which has a memory function.

[0054] like Figure 19As shown, the seat post 41 is provided with a push block 411 that can push the push protrusion 232 to move, thereby unlocking the locking assembly 2. A return spring 412 is provided between the push block 411 and the seat post 41. The push block 411 is provided with multiple inclined surfaces. When the seat post 41 is rotated to fold or rotated to unfold, the corresponding inclined surfaces on the push block 411 push the push protrusion 232 downward.

[0055] like Figure 6 As shown, a first torsion spring 15 is provided between the front leg 11 and the rear leg 12, and a second torsion spring 16 is provided between the push rod 13 and the rear leg 12. The function of the first torsion spring 15 and the second torsion spring 16 is to provide adaptive force, assisting the push rod 13 to rotate and move closer to the rear leg 12, while also causing the front leg 11 to rotate and move closer to the rear leg 12, making folding smoother.

[0056] like Figure 22 and Figure 24 As shown, a rotating plate 51 is connected to the rear leg 12 and can rotate relative to it. The rotating plate 51 is provided with a locking groove 511, and the push rod 13 is provided with a locking member 52 that can engage with the locking groove 511 when it is rotated and folded into place. A third torsion spring 53 is provided between the rotating plate 51 and the rear leg 12. When the frame assembly 1 is unfolded from the unfolded state, the rotating plate 51 is first moved so that the locking groove 511 on the rotating plate 51 gradually separates from the locking member 52. At this time, the push rod 13 can rotate and unfold relative to the rear leg 12. The third torsion spring 53 keeps the rotating plate 51 in the locked position. This design can prevent adults from accidentally unfolding the frame assembly 1, making it safer to use.

[0057] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A stroller, characterized by: The utility model provides a kind of vehicle frame assembly, including front leg (11) and rear leg (12) being rotatably connected on front leg (11) around first axis (A), front wheel (111) is provided on the front leg (11), rear wheel (121) is provided on the rear leg (12), push rod (13) can be rotatably connected to the rear leg (12) around second axis (B), linkage rod (14) is provided between the push rod (13) and front leg (11), one end of the linkage rod (14) is rotatable with front leg (11) around third axis (C), the other end of the linkage rod (14) is rotatably connected with push rod (13) around fourth axis (D), locking assembly (2) is provided on the rear leg (12) to enable linkage rod (14) to keep in unfolded position, mounting seat (3) is also detachably connected on the vehicle frame assembly (1), seat assembly (4) can be folded and is connected on the mounting seat (3), the seat assembly (4) is rotatably connected on mounting seat (3), and when the seat assembly (4) is folded and is rotated and close to vehicle frame assembly (1) towards, locking assembly (2) can be unlocked.

2. The stroller of claim 1, wherein: The seat assembly (4) can be detachably connected on the mounting seat (3) from positive position and back position, and when the seat assembly (4) is folded and is rotated or is rotated and close to vehicle frame assembly (1) towards, locking assembly (2) can be unlocked.

3. The stroller of claim 2, wherein: The seat assembly (4) includes seat rod (41) being rotatably connected on mounting seat (3) around fifth axis (E), backrest rod (42) can be rotatably arranged between the seat rod (41) and mounting seat (3), handrail rod (43) can be rotatably connected on the side of the seat rod (41) away from backrest rod (42), first locking assembly (44) is arranged between the handrail rod (43) and seat rod (41) to lock them, adjusting assembly (45) is arranged between the backrest rod (42) and seat rod (41) to adjust the position of backrest rod (42) relative to seat rod (41), second locking assembly (46) is arranged between the seat rod (41) and mounting seat (3) to lock them, and when the backrest rod (42) is folded and is rotated towards seat rod (41), backrest rod (42) can unlock first locking assembly (44) and second locking assembly (46).

4. The stroller of claim 3, wherein: The adjusting assembly (45) comprises a plurality of adjusting positions (451) arranged on the seat rod (41), the backrest rod (42) is arranged with a sliding seat (452) capable of sliding relative to the backrest rod (42), the sliding seat (452) is arranged with a latch (4521) capable of being clamped into the adjusting position (451), the sliding seat (452) and the backrest rod (42) are arranged with a first elastic member (453) capable of pushing the sliding seat (452) to reset, the backrest rod (42) is arranged with an unlocking member (454) capable of rotating relative to the backrest rod (42), the unlocking member (454) and the sliding seat (452) are arranged with a pull cable (455), and the seat rod (41) is further arranged with a locking groove (456) capable of locking the backrest rod (42) in a folded position.

5. The stroller of claim 3, wherein: The second locking assembly (46) comprises a left shell (461) arranged on the seat rod (41) and a right shell (462) arranged on the mounting base (3), the left shell (461) and the right shell (462) form a moving space (463) therebetween, the left shell (461) and the right shell (462) are arranged with clamping grooves (464), the moving space (463) is arranged with a clamping member (465) capable of moving transversely relative to the moving space (463), the clamping member (465) and the left shell (461) are arranged with a second elastic member (466) capable of enabling the clamping member (465) to be clamped with the clamping grooves (464) on the left shell (461) and the right shell (462) at the same time, the clamping member (465) is arranged with a protruding protrusion (4651), and the backrest rod (42) is arranged with a pushing step (467) capable of pushing the protrusion (4651) and enabling the clamping member (465) to be separated from the clamping groove (464) on the right shell (462) in the process of the backrest rod (42) being folded by rotating towards the seat rod (41).

6. The stroller of claim 3, wherein: The first locking assembly (44) comprises a first locking position (441) arranged on the armrest rod (43), the seat rod (41) is arranged with a locking member (442) capable of sliding up and down relative to the seat rod (41) to be clamped into or separated from the first locking position (441), the locking member (442) and the seat rod (41) are arranged with a third elastic member (443) capable of enabling the locking member (442) to be clamped in the first locking position (441), the armrest rod (43) is further arranged with a gap groove (431) capable of allowing the locking member (442) to slide therein, the gap groove (431) is communicated with the first locking position (441), and the backrest rod (42) is arranged with a pushing part (444) capable of pushing the locking member (442) to be separated from the first locking position (441) and enter into the gap groove (431) in the process of the backrest rod (42) being folded.

7. The stroller of claim 1, wherein: The rear leg (12) is further provided with a plurality of locking positions (122), the mounting seat (3) is provided with a locking plate (31) capable of sliding relative to the mounting seat (3), the locking plate (31) is provided with a locking part (311) capable of being locked into or separated from the locking position (122), the locking plate (31) and the mounting seat (3) are provided with a fourth elastic member (32) capable of pushing the locking plate (31) to reset, the locking plate (31) is provided with a locking block (33) capable of sliding downward relative to the locking plate (31), the locking block (33) and the locking plate (31) are provided with a fifth elastic member (34), and the rear leg (12) is further provided with a groove (123) capable of aligning with the locking block (33) when the locking plate (31) is pushed to be unlocked.

8. A child's vehicle according to claim 2 or 3, characterised in that: The locking assembly (2) comprises a first locking position (21) arranged on the push rod (13) and a second locking position (22) arranged on the front leg (11), the rear leg (12) is provided with a sliding block (23) capable of sliding relative to the rear leg (12), the sliding block (23) is provided with a clamping part (231) capable of being clamped into the first locking position (21) and the second locking position (22) at the same time, the sliding block (23) is further provided with a pushing protrusion (232) capable of extending out of the rear leg (12) and capable of being pushed by the seat assembly (4), the rear leg (12) is provided with a guide groove (124) capable of guiding the sliding of the clamping part (231), and the rear leg (12) is further provided with a connecting block (125), and the connecting block (125) and the sliding block (23) are provided with a sixth elastic member (24).

9. The stroller of claim 8, wherein: The push rod (13) is provided with a sliding sleeve (131) capable of sliding upward and downward relative to the push rod (13), the push rod (13) is provided with a pushing member (132) capable of rotating relative to the push rod (13) to push the sliding block (23) to slide downward, the pushing member (132) and the push rod (13) are provided with a seventh elastic member (133) capable of pushing the pushing member (132) to reset, and the pushing member (132) and the sliding sleeve (131) are provided with a pulling member (134).

10. The stroller of claim 8, wherein: The seat rod (41) is provided with a pushing block (411) capable of pushing the pushing protrusion (232) to move and then unlocking the locking assembly (2), the pushing block (411) and the seat rod (41) are provided with a reset spring (412), the first torsional spring (15) is arranged between the front leg (11) and the rear leg (12), the second torsional spring (16) is arranged between the push rod (13) and the rear leg (12), the rear leg (12) is connected with a rotating plate (51) capable of rotating relative to the rear leg (12), the rotating plate (51) is provided with a locking groove (511), the push rod (13) is provided with a locking member (52) capable of being locked into the locking groove (511) when the push rod (13) is rotated and folded in place, and the rotating plate (51) and the rear leg (12) are provided with a third torsional spring (53).

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