A child's pushchair

Abstract

This invention discloses a stroller that can be moved from an unfolded position to a folded position after the locking device is unlocked. It includes an unfoldable or foldable bottom support frame, which includes front legs and a rear leg rotatably connected to the front legs about a first axis A. A front wheel is connected to the front leg, and a rear wheel is connected to the rear leg. A support rod assembly rotatable about a second axis B is also connected to the bottom support frame, and a seat assembly rotatable about a third axis C is also connected to the bottom support frame. The seat assembly can be moved from an unfolded position to a folded position. A drive structure is provided between the seat assembly, front legs, rear legs, and support rod assembly, which allows the seat assembly to rotate relative to the bottom support frame and move towards the rear legs when the support rod assembly rotates towards the rear legs, and also allows the front and rear legs to rotate and move towards each other. The purpose of this invention is to overcome the shortcomings of the prior art and provide a stroller that is easy 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 for children, which can be moved from an unfolded position to a folded position after the locking device is unlocked, includes a bottom support frame 1 that can be unfolded or folded. The bottom support frame 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 connected to the front leg 11, and a rear wheel 121 is connected to the rear leg 12. A support rod assembly 13 that can rotate relative to the bottom support frame 1 about a second axis B is also connected to the bottom support frame 1. A seat assembly 2 that can rotate relative to the bottom support frame 1 about a third axis C is also connected to the bottom support frame 1. The seat assembly 2 can be moved from an unfolded position to a folded position. A drive structure 3 is provided between the seat assembly 2, the front leg 11, the rear leg 12, and the support rod assembly 13, which allows the seat assembly 2 to rotate relative to the bottom support frame 1 and move towards the rear leg 12 when the support rod assembly 13 rotates and moves towards the rear leg 12, and also allows the front leg 11 and the rear leg 12 to rotate and move towards each other.

[0006] The drive structure 3 includes a linkage assembly 31 disposed between the seat assembly 2, the front leg 11 and the rear leg 12, which enables the front leg 11 and the rear leg 12 to rotate and move closer together when the seat assembly 2 rotates relative to the bottom support frame 1. The drive structure 3 also includes a transmission assembly 32 disposed between the seat assembly 2, the front leg 11, the rear leg 12 and the support rod assembly 13, which enables the seat assembly 2 to rotate relative to the bottom support frame 1 when the support rod assembly 13 rotates.

[0007] The linkage assembly 31 includes a first linkage 311, one end of which is rotatably connected to the front leg 11 about a fourth axis D. The rear leg 12 is provided with a second linkage 312, one end of which is rotatably connected to the rear leg 11 about a fifth axis E. The first linkage 311 and the second linkage 312 rotate about a sixth axis F. A third linkage 313, which rotates about a seventh axis G, is connected to either the first linkage 311 or the second linkage 312. The other end of the third linkage 313 is rotatably connected to the seat assembly 2 about an eighth axis H.

[0008] A reversing component 4 is provided between the strut assembly 13 and the bottom support frame 1, which enables the strut assembly 13 to rotate back and forth relative to the bottom support frame 1.

[0009] The reversing assembly 4 includes a first locking position 41 and a second locking position 42 disposed on the rear leg 12 and corresponding to the front and rear positions of the support rod assembly 13. The support rod assembly 13 is provided with a first locking member 43 that can slide relative to it and engage or disengage from the first locking position 41 or the second locking position 42. The support rod assembly 13 is connected with a first unlocking member 44 that can slide relative to it. A first cable 45 is provided between the first unlocking member 44 and the first locking member 43. An elastic element 46 that can push the first locking member 43 to reset is provided between the first locking member 43 and the support rod assembly 13.

[0010] The seat assembly 2 includes a seat rod 21 rotatably connected to the rear leg 12 about a third axis C, a backrest rod 22 rotatably connected to the seat rod 21, and an armrest rod 23 rotatably connected between the backrest rod 22 and the seat rod 21. The third linkage rod 313 is rotatably connected to the seat rod 21 about an eighth axis H.

[0011] The transmission assembly 32 includes a rotating seat 321 rotatably connected to the rear leg 12. The rotating seat 321 is connected to the support rod assembly 13 and rotates with the support rod assembly 13 when the support rod assembly 13 rotates. The rotating seat 321 is provided with a plurality of toothed portions 322 along its circumference. The rear leg 12 is provided with a first gear 323 located on the inner side of the toothed portions 322, which can mesh with the toothed portions 322 for transmission. The seat rod is fixedly connected with a second gear 324 that meshes with the first gear 323, so that the rotation of the first gear 323 can drive the seat assembly 2 to rotate.

[0012] The support rod assembly 13 includes a support rod 131 rotatably connected to the rear leg 12, and a handle 132 that can rotate relative to the support rod 131 is connected to the support rod 131. A locking assembly 5 is provided between the first locking member 43 and the rotating seat 321, which can lock the two and be unlocked when the handle 132 rotates and folds relative to the support rod 131.

[0013] The locking assembly 5 includes a first slot 51 on the rear leg 12. A second locking member 52 is connected to the rotating seat 321 and can slide relative to it to engage or disengage from the first slot 51. The locking assembly 5 also includes a third locking member 54 connected to the first locking member 43 via a pin 53. The rear leg 12 is provided with a third locking position 55 and a fourth locking position 56 corresponding to the positions of the first locking position 41 and the second locking position 42. When the third locking member 54 is located in the third locking position 55 and the handle 132 rotates and folds relative to the support rod 131, the third locking member 54 can be pulled away from the third locking position 54 by the handle 132 to push the second locking member 52 and cause the second locking member 52 to disengage from the first slot 51. An elastic member 57 is provided between the third locking member 54 and the support rod 131 to push the third locking member 54 back to its original position.

[0014] An adjustment component 6 is provided between the backrest rod 22 and the seat rod 21 to adjust the tilt position between them. A first locking component 7 is provided between the seat rod 21, the backrest rod 22, and the armrest rod 23 to lock the seat rod 21 and the armrest rod 23 and to unlock them when the backrest rod 22 rotates towards the seat rod 21. A second locking component 8 is provided between the rear leg 12 and the seat rod 21 and the backrest rod 22 to lock them together. The second locking component 8 includes components located on the rear leg 12. The seat rod 21 is provided with a locking position 81, and a fifth locking member 82 is provided on the seat rod 21, which can slide relative to it and be engaged or disengaged from the locking position 81. A spring 83 is provided between the fifth locking member 82 and the backrest rod 22, which can push the fifth locking member 82 to reset. The fifth locking member 82 is provided with a first pushing slope 821. The backrest rod 22 is provided with a protruding protrusion 84. The protrusion 84 is provided with a second pushing slope 841 that can contact and abut against the first pushing slope 821.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. When this invention needs to be folded, first unlock the locking device, then move the seat assembly from the unfolded position to the folded position, and then rotate the support rod assembly. At this time, the support rod assembly rotates relative to the rear leg around the second axis B. During the rotation, the drive structure is driven by the support rod assembly. At this time, the seat assembly rotates counterclockwise relative to the bottom support frame around the third axis C and moves towards the rear leg. Simultaneously, the front leg rotates relative to the rear leg around the first axis A. When the seat assembly moves towards the rear leg, the front leg moves towards the rear leg, and the support rod assembly moves towards the rear leg, the entire stroller is folded. The folding operation is very simple. This invention only requires folding the seat assembly, unlocking the locking device, and then pushing the support rod assembly to rotate towards the front leg.

[0017] 2. When the support rod assembly rotates relative to the rear leg, the support rod assembly drives the transmission assembly to move. When the transmission assembly moves, it causes the seat assembly to rotate relative to the rear leg. At this time, the seat assembly drives the front leg to rotate and move closer to the rear leg through the linkage assembly. [Attached Image Description]

[0018] Figure 1 This is a perspective view of the stroller of the present invention;

[0019] Figure 2 This is a side view of the stroller of the present invention;

[0020] Figure 3 This is a perspective view of the bottom support frame of the stroller of the present invention;

[0021] Figure 4 This is a side view of the bottom support frame of the stroller of the present invention;

[0022] Figure 5 This is a side view of the stroller of the present invention after it has been turned around;

[0023] Figure 6 This is an exploded view of the reversing component of the stroller of the present invention;

[0024] Figure 7 yes Figure 3 Enlarged view of region I in the middle;

[0025] Figure 8 This is one of the exploded views of the transmission component in the stroller of the present invention;

[0026] Figure 9 This is the second exploded view of the transmission component in the stroller of the present invention;

[0027] Figure 10 This is a perspective view of the locking assembly in the stroller of the present invention;

[0028] Figure 11 This is one of the exploded views of the locking assembly in the stroller of the present invention;

[0029] Figure 12 This is the second exploded view of the locking assembly in the stroller of the present invention;

[0030] Figure 13 This is the third exploded view of the locking assembly in the stroller of the present invention;

[0031] Figure 14 This is a diagram showing the third locking component of the stroller of the present invention disengaged from the third locking position;

[0032] Figure 15 This is a diagram showing the state of the third locking component disengaging from the third locking position and the second locking component disengaging from the first slot in the stroller of the present invention;

[0033] Figure 16 This is one of the exploded views of the seat assembly in the stroller of the present invention;

[0034] Figure 17 This is a perspective view of the backrest bar in the stroller of the present invention;

[0035] Figure 18 This is the second exploded view of the seat assembly in the stroller of the present invention;

[0036] Figure 19 This is one of the exploded views of the third locking component in the stroller of the present invention;

[0037] Figure 20 This is the second exploded view of the third locking component in the stroller of the present invention;

[0038] Figure 21 This is a diagram showing the state of the stroller seat assembly of the present invention when folded.

[0039] Figure 22 This is a diagram showing the state of the stroller when it is folded.

Detailed Implementation Methods

[0040] The present invention will now be further described with reference to the accompanying drawings:

[0041] like Figures 1 to 22As shown, the present invention provides a child stroller that can be moved from an unfolded position to a folded position after the locking device is unlocked. It includes a bottom support frame 1 that can be unfolded or folded. The bottom support frame 1 includes a front leg 11 and a rear leg 12 rotatably connected to the front leg 11 about a first axis A. A support rod assembly 13 that can rotate relative to the bottom support frame 1 about a second axis B is also connected to the bottom support frame 1. A seat assembly 2 that can rotate relative to the bottom support frame 1 about a third axis C is also connected to the bottom support frame 1. The seat assembly 2 can be moved from an unfolded position to a folded position. A drive structure 3 is provided between the seat assembly 2, the front leg 11, the rear leg 12 and the support rod assembly 13, which allows the seat assembly 2 to rotate relative to the bottom support frame 1 and move towards the rear leg 12 when the support rod assembly 13 rotates and moves towards the rear leg 12, and also allows the front leg 11 and the rear leg 12 to rotate and move towards each other. When the present invention needs to be folded, first unlock the locking device, then move the seat assembly 2 from the unfolded position to the folded position, and then rotate the support rod assembly 13. At this time, the support rod assembly 13 rotates relative to the rear leg 12 around the second axis B. During the rotation, the drive structure 3 is driven by the support rod assembly 13. At this time, the seat assembly 2 rotates counterclockwise relative to the bottom support frame 1 around the third axis C and moves closer to the rear leg 12. At the same time, the front leg 11 rotates relative to the rear leg 12 around the first axis A. When the seat assembly 2 moves closer to the rear leg 12, the front leg 11 moves closer to the rear leg 12, and the support rod assembly 13 moves closer to the rear leg 12, the entire stroller is folded. The folding operation is very simple. The present invention only requires folding the seat assembly 2, unlocking the locking device, and then pushing the support rod assembly 13 to rotate closer to the front leg 11.

[0042] The drive structure 3 includes a linkage assembly 31 disposed between the seat assembly 2, the front leg 11, and the rear leg 12, which enables the front leg 11 and the rear leg 12 to rotate and move closer together when the seat assembly 2 rotates relative to the bottom support frame 1. The drive structure 3 also includes a transmission assembly 32 disposed between the seat assembly 2, the front leg 11, the rear leg 12, and the support rod assembly 13, which enables the seat assembly 2 to rotate relative to the bottom support frame 1 when the support rod assembly 13 rotates. When the support rod assembly 13 rotates relative to the rear leg 12, the support rod assembly 13 drives the transmission assembly 32 to move. When the transmission assembly 32 moves, the seat assembly 2 rotates relative to the rear leg 12. At this time, the seat assembly 2 drives the front leg 11 to rotate and move closer to the rear leg 12 through the linkage assembly 31.

[0043] The linkage assembly 31 includes a first linkage 311, one end of which is rotatably connected to the front leg 11 about a fourth axis D. The rear leg 12 is provided with a second linkage 312, one end of which is rotatably connected to the rear leg 11 about a fifth axis E. The first linkage 311 and the second linkage 312 rotate about a sixth axis F. A third linkage 313, which rotates about a seventh axis G, is connected to either the first linkage 311 or the second linkage 312. The other end of the third linkage 313 is rotatably connected to the seat assembly 2 about an eighth axis H. When the seat assembly 2 rotates counterclockwise relative to the rear leg 12 around the third axis C, the seat assembly 2 pulls one end of the third linkage rod 313 to move. As the third linkage rod 313 moves with the seat assembly 2, it also rotates relative to the seat assembly 2 around the eighth axis H. The other end of the third linkage rod 313 rotates relative to the first linkage rod 311 and the second linkage rod 312 and pulls the first linkage rod 311 and the second linkage rod 312 to move. The connection between the first linkage rod 311 and the second linkage rod 312 rotates around the sixth axis F. The other end of the first linkage rod 311 rotates relative to the front leg 11 around the fourth axis D. The second linkage rod 312 rotates relative to the rear leg 12 around the fifth axis E. At this time, the first linkage rod 311 and the second linkage rod 312 move closer to each other. Under the pull of the first linkage rod 311 and the second linkage rod 312, the front leg 11 and the rear leg 12 move closer to each other.

[0044] A reversing assembly 4 is provided between the support rod assembly 13 and the bottom support frame 1, which allows the support rod assembly 13 to rotate back and forth relative to the bottom support frame 1. The support rod assembly 13 can be reversed back and forth by the reversing assembly 4, making it convenient for adults to take care of children sitting in the seat assembly 2.

[0045] The reversing assembly 4 includes a first locking position 41 and a second locking position 42 disposed on the rear leg 12 and corresponding to the front and rear positions of the support rod assembly 13. The support rod assembly 13 is provided with a first locking member 43 that can slide relative to it and engage or disengage from the first locking position 41 or the second locking position 42. The support rod assembly 13 is connected with a first unlocking member 44 that can slide relative to it. A first cable 45 is provided between the first unlocking member 44 and the first locking member 43. An elastic element 46 that can push the first locking member 43 to reset is provided between the first locking member 43 and the support rod assembly 13.

[0046] When the strut assembly 13 needs to be rotated and reversed, the first unlocking member 44 is pulled, and the first unlocking member 44 slides relative to the strut assembly 13. When the first unlocking member 44 slides, it drives the first cable 45 to move. When the first cable 45 moves, it drives the first locking member 43 to slide. The first locking member 43 then disengages from the first locking position 41 or the second locking position 42. At this time, the strut assembly 13 can be rotated relative to the rear leg 12 and reversed. When the strut assembly 13 is adjusted to the correct position, the first unlocking member 44 is released, and the elastic element 46 pushes the first unlocking member 44 to re-engage in the second locking position 42 or the first locking position 41. At this time, the strut assembly 13 and the rear leg 12 are locked again.

[0047] The seat assembly 2 includes a seat rod 21 rotatably connected to the rear leg 12 about a third axis C. A backrest rod 22, which can rotate relative to the seat rod 21, is connected to the seat rod 21. An armrest rod 23, which can rotate relative to the backrest rod 22 and the seat rod 21, is also provided. A third linkage rod 313 is rotatably connected to the seat rod 21 about an eighth axis H. The backrest rod 22 can be rotated and unfolded or folded relative to the seat rod 21.

[0048] The transmission assembly 32 includes a rotating seat 321 rotatably connected to the rear leg 12. The rotating seat 321 is connected to the support rod assembly 13 and rotates with the support rod assembly 13 when the support rod assembly 13 rotates. The rotating seat 321 is provided with a plurality of toothed portions 322 along its circumference. The rear leg 12 is provided with a first gear 323 located on the inner side of the toothed portions 322, which can mesh with the toothed portions 322 for transmission. The seat rod is fixedly connected with a second gear 324 that meshes with the first gear 323, so that the rotation of the first gear 323 can drive the seat assembly 2 to rotate. When the support rod assembly 13 rotates relative to the rear leg 12, the rotating seat 321 rotates clockwise following the support rod assembly 13. When the rotating seat 321 rotates, the gear teeth 322 on it drives the first gear 323 to rotate. The first gear 323 rotates clockwise relative to the rear leg 12. When the first gear 323 rotates, it drives the second wheel 324 to rotate. The second wheel 324 then rotates counterclockwise. At this time, the seat rod 21 is driven by the second wheel 324 to rotate counterclockwise relative to the rear leg 12 and move closer to the rear leg 12.

[0049] The rotating seat 321 includes a first rotating seat 3211 disposed on the rear leg 12 and close to the seat assembly 2. The rotating seat 321 also includes a second rotating seat 3212 connected to the first rotating seat 3211 and close to the support rod assembly 13. The first rotating seat 3211 is provided with a plurality of connecting posts 32111 connected to the second rotating seat 3212. The rear leg 12 is provided with a first clearance groove 122 through which the connecting posts 32111 pass and move. The rear leg 12 is also provided with a protruding post 123. The first gear 323 is connected to the protruding post 123, and the first rotating seat 3211 is provided with a second clearance groove 122 through which the protruding post 123 passes and moves.

[0050] The support rod assembly 13 includes a support rod 131 rotatably connected to the rear leg 12. A handle 132, which can rotate relative to the support rod 131, is connected to the support rod 131. A locking assembly 5 is provided between the first locking member 43, the rotating seat 321, and the rear leg 12, which can lock the rotating seat 321 and the rear leg 12 and can be unlocked when the handle 132 rotates and folds relative to the support rod 131. The locking assembly 5 is used to lock the support rod 131, the rotating seat 321, and the rear leg 12.

[0051] The locking assembly 5 includes a first slot 51 on the rear leg 12. A second locking member 52 is connected to the rotating seat 321 and can slide relative to it to engage or disengage from the first slot 51. The locking assembly 5 also includes a third locking member 54 connected to the first locking member 43 via a pin 53. The rear leg 12 is provided with a third locking position 55 and a fourth locking position 56 corresponding to the positions of the first locking position 41 and the second locking position 42. When the third locking member 54 is located in the third locking position 55 and the handle 132 rotates and folds relative to the support rod 131, the third locking member 54 can be pulled away from the third locking position 54 by the handle 132 to push the second locking member 52 and cause the second locking member 52 to disengage from the first slot 51. An elastic member 57 is provided between the third locking member 54 and the support rod 131 to push the third locking member 54 back to its original position. When the strut assembly 13 needs to rotate and change direction, the third locking member 54 slides with the first locking member 43 through the pin 53. When the first locking member 43 disengages from the first locking position 41 or the second locking position 42, the third locking member 54 disengages from the third locking position 55 or the fourth locking position 56. However, at this time, the third locking member 54 is located inside the rear leg 12 and the second locking member 52 is still locked in the first slot 51, so the strut assembly 13 cannot rotate and fold relative to the rear leg 12. When the handle 132 rotates and folds relative to the support rod 131, the handle 132 drives the third locking member 54 to move. When the third locking member 54 moves, it disengages from the third locking position 55 and moves upward. At this time, the first locking member 43 also disengages from the first locking position 41. The third locking member 54 gradually abuts against the second locking member 52. The second locking member 52 gradually disengages from the first locking groove 51 until the bottom ends of the second locking member 52 and the third locking member 54 are both located in the rotating seat 321. Only then can the support rod assembly 13 rotate backward relative to the rear leg 12 and move closer to the rear leg 12.

[0052] The seat assembly 2 includes a seat rod 21 rotatably connected to the rear leg 12 about a third axis C. A backrest rod 22, which can rotate relative to the seat rod 21, is connected to the seat rod 21. An armrest rod 23, which can rotate relative to the backrest rod 22 and the seat rod 21, is also provided. A third linkage rod 313 is rotatably connected to the seat rod 21 about an eighth axis H. The third linkage rod 313 can only be moved when the seat rod 21 rotates relative to the rear leg 12, thereby causing the front leg 11 and the rear leg 12 to rotate and move closer together.

[0053] An adjustment component 6 is provided between the backrest rod 22 and the seat rod 21 to adjust the tilt position between them. A first locking component 7 is provided between the seat rod 21, the backrest rod 22 and the armrest rod 23 to lock the seat rod 21 and the armrest rod 23 and to be unlocked when the backrest rod 22 rotates toward the seat rod 21.

[0054] The adjustment assembly 6 includes multiple adjustment positions 61 rotatably mounted on the seat rod 21. The seat rod 21 is provided with a fourth locking member 62 that can slide relative to it and disengage from the adjustment positions 61. The backrest rod 22 is provided with a second unlocking member 63 that can move relative to it. A second cable 64 that can pull the fourth locking member 62 to slide is provided between the second unlocking member 63 and the fourth locking member 62. A first elastic reset member 65 that can push the fourth locking member 62 back to its original position is provided between the fourth locking member 62 and the backrest rod 22. When the position of the backrest rod 22 relative to the seat rod 21 needs to be adjusted, the second unlocking component 63 is operated. Operation of the second unlocking component 63 causes the second pull cable 64 to move. As the second pull cable 64 moves, it causes the second locking component 62 to slide and disengage from the adjustment position 61. At this point, rotating the backrest rod 22 allows for adjustment of the position. When the backrest rod 22 is properly adjusted relative to the seat rod 21, the second unlocking component 63 is released. The first elastic reset component 65 then pushes the second locking component 62 to re-lock with the adjustment position 61, thus locking the seat rod 21 and backrest rod 22. When the seat assembly 2 needs to be folded, the adjustment component 6 is first unlocked, and then the backrest rod 22 is pushed towards the seat rod 21.

[0055] The first locking assembly 7 includes a left connecting shell 71 on the backrest rod 22 and a right connecting shell 72 on the seat rod 21. A sealed space is formed between the left connecting shell 71 and the right connecting shell 72. The armrest rod 23 has a first locking groove 73, and the right connecting shell 72 has a second locking groove 74. The sealed space contains a first spline 75 that can move laterally within it and simultaneously engage with the first locking groove 73 on the armrest rod 23 and the second locking groove 74 on the right connecting shell 72. A return spring 76 is provided between the first spline 75 and the right connecting shell 72 to push the first spline 75 back to its original position. The left connecting shell 71 has a driving part 77 that can push the first spline 75 away from the first locking groove 73 on the armrest rod 23 when rotated. The driving part 77 is a protrusion on the backrest rod 22. The first spline 75 has a groove that can accommodate the protrusion and an inclined surface that can abut against the protrusion. When the backrest rod 22 rotates relative to the seat rod 21, the protrusion on the backrest rod 22 pushes against the inclined surface on the first spline 75. At this time, the first spline 75 slides laterally relative to the left connecting shell 71 and the right connecting shell 72. When the first spline 75 slides, it disengages from the first locking groove 73 on the armrest rod 23. At this time, the armrest rod 23 is unlocked, and the armrest rod 23 can rotate relative to the seat rod 21 and move closer to the seat rod 21.

[0056] A second locking component 8 is provided between the rear leg 12 and the seat rod 21 and backrest rod 22, which can lock the two together. After the second locking component 8 is unlocked, the seat rod 21 can rotate relative to the rear leg 12 and move closer to the rear leg 12.

[0057] The second locking assembly 8 includes a locking position 81 on the rear leg 12. The seat rod 21 is provided with a fifth locking member 82 that can slide relative to it and engage or disengage from the locking position 81. A spring 83 is provided between the fifth locking member 82 and the backrest rod 22 to push the fifth locking member 82 back to its original position. The fifth locking member 82 is provided with a first pushing slope 821. The backrest rod 22 is provided with a protruding protrusion 84. The protrusion 84 is provided with a second pushing slope 841 that can contact and abut against the first pushing slope 821. When the backrest rod 22 rotates a certain distance relative to the seat rod 21, the protrusion 84 on the backrest rod 22 gradually disengages from the second locking member 52. The second pushing slope 841 on the protrusion 84 and the first pushing slope 521 of the second locking member 52 fit together, and the second pushing slope 841 pushes the first pushing slope 521, causing the fifth locking member 82 to gradually disengage from the locking position 81.

[0058] A third locking component 133 is provided between the support rod 131 and the handle 132 to lock the two together.

[0059] The third locking assembly 133 includes a left connecting shell 1331 on the support rod 131 and a right connecting shell 1332 on the handle 132. A sealed space is formed between the left connecting shell 1331 and the right connecting shell 1332. Spline grooves 1333 are provided on the left connecting shell 1331 and the right connecting shell 1332. A second spline 1334 is provided in the sealed space, which can move laterally and engage with the spline grooves 1333 on the left connecting shell 1331 and the right connecting shell 1332. An elastic reset member 1335 is provided between the first spline 55 and the left connecting shell 1331 to reset the second spline 1334. A member is provided between the second spline 1334 and the right connecting shell 1332 to disengage the second spline 1334. The right connector housing 1332 has a rotating component 1336, and the handle 132 has an operable operating component 1337. A third cable 1338 is provided between the operating component 1337 and the rotating component 1336 to drive the rotating component 1336 to rotate. The right connector housing 1332 has a pushing part 1339 that can push the second spline 1334 to disengage from the spline groove 1333 on the right connector housing 1332 when rotating. The locking assembly 5 also includes a rotating unlocking component 58 rotatably connected to the left connector housing 1331. A fourth cable 59 is provided between the third locking component 54 and the rotating unlocking component 59. The right connector housing 1332 has a pushing part 13321 that can push the unlocking component 58 to rotate when the handle 132 is rotated and folded.

[0060] When the stroller needs to be folded, press the operating part 1337. The operating part 1337 will drive the third cable 1338 to move. When the third cable 1338 moves, it will drive the rotating part 1336 to rotate. When the rotating part 1336 rotates, it will be pushed by the pushing part 1339 and move laterally. At this time, the second spline 1334 will be pushed by the rotating part 1336 and will disengage from the spline groove 1333 on the right connector shell 1332 and enter the left connector shell 1331. When the handle bar 132 rotates, the pushing part 13321 will push the unlocking part 58 to rotate. At this time, the unlocking part 58 will drive the fourth cable 59 to unlock the locking assembly 5.

Claims

1. A stroller that can be moved from an unfolded position to a folded position after the locking device is unlocked, characterized in that: The system includes a bottom support frame (1) that can be unfolded or folded. The bottom support frame (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 connected to the front leg (11), and a rear wheel (121) is connected to the rear leg (12). A strut assembly (13) rotatable relative to the bottom support frame (1) about a second axis (B) is also connected to the bottom support frame (1). A seat assembly (2) rotatable relative to the bottom support frame (1) about a third axis (C) is also connected to the bottom support frame (1). The seat assembly (2) described above can be moved from the unfolded position to the folded position. A drive structure (3) is provided between the seat assembly (2), front leg (11), rear leg (12), and support rod assembly (13) to allow the seat assembly (2) to rotate relative to the bottom support frame (1) and move towards the rear leg (12) when the support rod assembly (13) rotates towards the rear leg (12), and also allows the front leg (11) and rear leg (12) to rotate towards each other. A drive structure (3) is provided between the support rod assembly (13) and the bottom support frame (1) to allow the support rod assembly (13) to rotate relative to the bottom support frame (1) to move towards the rear leg (12). The reversing assembly (4) for rear rotation reversing; the reversing assembly (4) includes a first locking position (41) and a second locking position (42) disposed on the rear leg (12) and corresponding to the front and rear positions of the support rod assembly (13), the support rod assembly (13) is provided with a first locking member (43) that can slide relative to it and engage or disengage from the first locking position (41) or the second locking position (42); the seat assembly (2) includes a seat rod (21) rotatably connected to the rear leg (12) about a third axis (C), the seat rod (21) is connected with a... The backrest rod (22) is rotatable relative to the seat rod (21), and an armrest rod (23) is also provided between the backrest rod (22) and the seat rod (21) that is rotatable relative to it; the support rod assembly (13) includes a support rod (131) rotatably connected to the rear leg (12), and a handle rod (132) rotatable relative to it is connected to the support rod (131); a locking assembly (5) is provided between the first locking member (43) and the rotating seat (321) that can lock the two and be unlocked when the handle rod (132) rotates and folds relative to the support rod (131);The locking assembly (5) includes a first slot (51) on the rear leg (12), and a second locking member (52) connected to the rotating seat (321) that can slide relative to it and engage or disengage from the first slot (51). The locking assembly (5) also includes a third locking member (54) connected to the first locking member (43) via a pin (53). The rear leg (12) is provided with a third locking position (55) and a fourth locking position corresponding to the positions of the first locking position (41) and the second locking position (42). Positioning (56), and when the third locking member (54) is located in the third locking position (55) and the handle (132) rotates and folds relative to the support rod (131), the third locking member (54) can be pulled away from the third locking position (55) by the handle (132) and push the second locking member (52) and cause the second locking member (52) to disengage from the first slot (51). An elastic component (57) capable of pushing the third locking member (54) back to its original position is provided between the third locking member (54) and the support rod (131).

2. The stroller according to claim 1, characterized in that: The drive structure (3) includes a linkage assembly (31) disposed between the seat assembly (2), the front leg (11) and the rear leg (12) and capable of rotating and bringing the front leg (11) and the rear leg (12) closer together when the seat assembly (2) rotates relative to the bottom support frame (1). The drive structure (3) also includes a transmission assembly (32) disposed between the seat assembly (2), the front leg (11), the rear leg (12) and the support rod assembly (13) and capable of driving the seat assembly (2) to rotate relative to the bottom support frame (1) when the support rod assembly (13) rotates.

3. The stroller according to claim 2, characterized in that: The linkage assembly (31) includes a first linkage (311) with one end rotatably connected to the front leg (11) about a fourth axis (D), and a second linkage (312) with one end rotatably connected about a fifth axis (E) on the rear leg (12). The first linkage (311) and the second linkage (312) rotate about a sixth axis (F). A third linkage (313) rotatably connected about a seventh axis (G) is connected to the first linkage (311) or the second linkage (312). The other end of the third linkage (313) is rotatably connected to the seat assembly (2) about an eighth axis (H).

4. The stroller according to claim 1, characterized in that: The strut assembly (13) is connected to a first unlocking member (44) that can slide relative to it. A first cable (45) is provided between the first unlocking member (44) and the first locking member (43). An elastic element (46) that can push the first locking member (43) to reset is provided between the first locking member (43) and the strut assembly (13).

5. The stroller according to claim 3, characterized in that: The third linkage rod (313) is rotatably connected to the seat rod (21) around the eighth axis (H).

6. The stroller according to claim 3, characterized in that: The transmission assembly (32) includes a rotating seat (321) rotatably connected to the rear leg (12). The rotating seat (321) is connected to the support rod assembly (13) and rotates with the support rod assembly (13) when the support rod assembly (13) rotates. The rotating seat (321) is provided with a plurality of gear teeth (322) along the circumference. The rear leg (12) is provided with a first gear (323) that can mesh with the gear teeth (322) for transmission. The seat rod is fixedly connected with a second gear (324) that meshes with the first gear (323) so that the first gear (323) can drive the seat assembly (2) to rotate when it rotates.

7. The stroller according to claim 1, characterized in that: An adjustment component (6) is provided between the backrest rod (22) and the seat rod (21) to adjust the tilt position between them. A first locking component (7) is provided between the seat rod (21), the backrest rod (22), and the armrest rod (23) to lock the seat rod (21) and the armrest rod (23) and to unlock it when the backrest rod (22) rotates towards the seat rod (21). A second locking component (8) is provided between the rear leg (12) and the seat rod (21) and the backrest rod (22) to lock them. The second locking component (8) includes components located on the rear leg (12). 2) The seat rod (21) is provided with a locking position (81), and a fifth locking member (82) is provided on the seat rod (21) so as to slide relative to it and engage or disengage from the locking position (81). A spring (83) is provided between the fifth locking member (82) and the backrest rod (22) so as to push the fifth locking member (82) to reset. The fifth locking member (82) is provided with a first pushing slope (821). The backrest rod (22) is provided with a protruding protrusion (84). The protrusion (84) is provided with a second pushing slope (841) so as to contact and abut against the first pushing slope (821).

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