A child's pushchair

Abstract

The utility model discloses a kind of children's pushchairs, including bottom support frame, the seat portion that the bottom support frame upper side is equipped with can be for children to ride, the bottom support frame lower side is equipped with front wheel and rear wheel, the vertical rod of the bottom support frame upper and located seat portion front side is equipped with upward extension, the vertical rod upper end is equipped with the handle that its two sides transversely extends, the children's pushchair further includes the support assembly that can be detachably connected with bottom support frame and handle, the support assembly includes the rear support frame that can be detachably connected with the rear portion of bottom support frame, the rear support frame upper end is connected with the seat frame that can be ridden, the seat frame front side is detachably connected with handle, the seat frame rear side or rear support frame upper end is also connected with push rod assembly. The utility model can be pushed by adult, and also can convert state to be used for children to operate play alone.

Description

[Technical Field]

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

[0002] Strollers have become an essential tool for modern families traveling with infants and toddlers, providing great convenience for parents. The most common strollers consist of a frame, seat, and push bar. The child sits in the seat, while the adult pushes the stroller using the push bar. However, these strollers can only be pushed by an adult; children cannot operate and play with them independently, making them unsuitable for older children who wish to use the stroller as a toy. Therefore, more and more users are hoping for a stroller that can be both pushed by an adult and can be switched to allow children to ride and play independently. [Utility Model Content]

[0003] The purpose of this invention is to overcome the shortcomings of existing technology and provide a simple and versatile children's stroller. This stroller can be pushed by an adult or switched to a different mode for children to operate and play independently.

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

[0005] A stroller includes a bottom support frame, a seat for a child to sit on on the upper side of the bottom support frame, front wheels and rear wheels on the lower side of the bottom support frame, an upwardly extending vertical rod on the bottom support frame and in front of the seat, a handle extending laterally to both sides at the upper end of the vertical rod, and a support assembly detachably connected to the bottom support frame and the handles. The support assembly includes a rear support frame detachably connected to the rear of the bottom support frame, a seat frame for sitting on connected to the upper end of the rear support frame, a front side of the seat frame detachably connected to the handles, and a push rod assembly connected to the rear side of the seat frame or the upper end of the rear support frame.

[0006] The seat frame includes a seat support for sitting, with a snap-fit ​​shell at the front end of the seat support that snaps into the handle end. A leg support frame, which can rotate relative to the snap-fit ​​shell to support a child's legs, is connected to the outer side of the snap-fit ​​shell. The leg support frame has a connecting shell fixedly connected to the snap-fit ​​shell. A first locking pin, capable of engaging or disengaging from a first snap-fit ​​hole at the handle end, is provided within the space enclosed by the connecting shell and the snap-fit ​​shell. A first pin rod passes through the first locking pin. A rotating sleeve, capable of rotation, is provided inside the connecting shell. An opening with a first helical surface is provided on the side wall of the rotating sleeve. The first pin rod passes through the opening and abuts against the first helical surface, so that when the rotating sleeve rotates, the first helical surface pushes the first pin rod, causing the first locking pin to disengage from the first snap-fit ​​hole. A first return spring, capable of pushing the first locking pin back to its original position, is also provided inside the connecting shell. A drive component, capable of rotating the rotating sleeve, is provided on the leg support frame.

[0007] The connecting shell is also provided with a second locking pin that can slide relative to it and is exposed. The second locking pin is provided with a second pin rod that passes through the opening. The opening is provided with a second helical surface on the side opposite to the first helical surface, which can push the second pin rod when the rotating sleeve rotates, so that the second locking pin moves towards the first locking pin. One end of the first return spring abuts against the first pin rod, and the other end abuts against the second pin rod. The push rod assembly is provided with a second locking hole that can engage with the second locking pin after the seat frame is separated from the handle and the seat frame rotates and approaches relative to the push rod assembly.

[0008] The connecting shell and the snap-fit ​​shell are fixedly provided with guide rods, and the guide rods are provided with guide grooves for the first pin and the second pin to slide within.

[0009] The driving component includes a snap-fit ​​sleeve sleeved outside the rotating sleeve and capable of driving the rotating sleeve to rotate; the leg support frame is provided with an exposed sliding frame that can slide relative to it; a first pull rope is provided between the sliding frame and the snap-fit ​​sleeve, which can drive the snap-fit ​​sleeve to rotate when the sliding frame slides into the leg support frame; a second return spring is provided between the sliding frame and the leg support frame, which can push the sliding frame to reset; and a third return spring is provided between the snap-fit ​​sleeve and the connecting shell, which can push the snap-fit ​​sleeve to rotate and reset.

[0010] The snap-fit ​​housing has at least two snap-fit ​​positions along its circumference. The end of the sliding frame has a snap-fit ​​part that can engage or disengage with the snap-fit ​​positions. An exposed button is slidably connected to the leg support frame. The button includes an exposed pressing part and a connecting block connected to the pressing part. The connecting block has a blocking block. The sliding frame has a clearance groove that allows the connecting block to move relative to it. When the button is pressed, the clearance groove is opposite to the connecting block, allowing the sliding frame to slide to the position that drives the snap-fit ​​sleeve to rotate. When the button is not pressed, the clearance groove is misaligned with the connecting block, and the blocking block is opposite to the blocking surface on the sliding frame, allowing the sliding frame to slide only to the position where the snap-fit ​​part and the snap-fit ​​position are disengaged. A fourth return spring is provided between the button and the leg support frame to push the button back to its original position.

[0011] The leg support frame is provided with a straight groove and an inclined groove identical to the straight groove. The sliding frame is provided with a transverse groove. A movable column that can move within the straight groove and the inclined groove is inserted into the transverse groove. The first pull rope is connected between the movable column and the locking sleeve. When the sliding frame slides relative to the leg support frame, the groove wall of the transverse groove pushes the movable column to move within the straight groove and the inclined groove. When the movable column moves within the straight groove, the first pull rope is in a slack state. When the movable column moves within the inclined groove, the first pull rope is tensioned and pulls the locking sleeve to rotate.

[0012] The rear support frame includes a connecting seat. The connecting seat and the rear of the bottom support frame are provided with a first locking structure for locking the two together. The push rod assembly includes a push rod seat rotatably connected to the rear end of the seat frame. A lower support rod is fixedly connected to the push rod seat. A push rod is rotatably connected to the upper end of the lower support rod. A second locking structure for locking the two together is provided between the push rod seat and the connecting seat. A first connecting rod is rotatably connected to both of them. A second connecting rod is also rotatably connected to both of them so that the rear support frame can be folded. A third locking structure for locking the two together is provided between the upper end of the second connecting rod and the push rod seat and can be unlocked when the push rod rotates and folds relative to the lower support rod.

[0013] The bottom support frame includes a rear support and a front support that can rotate relative to the rear support. The connecting seat is detachably connected to the rear support. The vertical rod, the seat part and the rear wheel are all located on the rear support. The front wheel is located on the front support. A fourth locking structure for locking the front support and the rear support is provided.

[0014] The first locking structure includes an open slot on the front side of the connecting seat, a locking rod on the rear bracket that can engage with the open slot, a sliding block on the rear side of the connecting seat that can slide relative to it, a locking block at the lower end of the sliding block that can engage or disengage with the locking hole on the rear bracket, an exposed pressing block at the upper end of the sliding block that can push the sliding block to slide, and a fifth return spring inside the connecting seat that can push the sliding block to slide back to its original position.

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

[0016] 1. When the support assembly of this utility model is connected to the bottom support frame and the handle, an adult can push the stroller using the push rod assembly, with the child sitting in the higher seat frame. When the support assembly is removed from the bottom support frame and the handle, the child can operate the handle with both hands and sit in the lower seat, allowing the child to operate and play independently. Therefore, this utility model stroller can be transformed to allow children to play independently or be operated and pushed by adults, offering multiple functions and making it suitable for widespread application.

[0017] 2. The seat frame and push rod assembly of this utility model are rotatably connected. Therefore, when the rear support frame is connected to the bottom support frame and the seat frame is detached from the handle, the seat frame can be brought closer to the push rod assembly. At this time, the child sits on the lower seat part, and the adult can also push it through the push rod assembly. Therefore, when the stroller of this utility model is pushed by an adult, the child can sit on the seat frame at a higher position or on the seat part at a lower position, which is convenient for the user to choose according to their needs. [Attached Image Description]

[0018] Figure 1 This is a perspective view of the utility model;

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

[0020] Figure 3 This is a side view of the seat frame and handles of this utility model when they are detached;

[0021] Figure 4 This is one of the exploded views of this utility model;

[0022] Figure 5 This is the second exploded view of this utility model;

[0023] Figure 6 This is one of the exploded views of the components of this utility model;

[0024] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0025] Figure 8 This is one of the cross-sectional views of a component of this utility model;

[0026] Figure 9 This is the second exploded view of a component of this utility model;

[0027] Figure 10 yes Figure 9 Enlarged view at point B;

[0028] Figure 11 yes Figure 9 A magnified view at point C;

[0029] Figure 12 This is a perspective view of the button of this utility model;

[0030] Figure 13 This is the second sectional view of a component of this utility model;

[0031] Figure 14 This is one of the perspective views of the components of this utility model;

[0032] Figure 15 This is the third exploded view of the component of this utility model;

[0033] Figure 16 This is the fourth exploded view of the components of this utility model;

[0034] Figure 17 This is the fifth exploded view of the components of this utility model;

[0035] Figure 18 This is the second perspective view of a component of this utility model;

[0036] Figure 19 This is the sixth exploded view of the components of this utility model;

[0037] Figure 20 This is a side view of the present invention during the folding process;

[0038] Figure 21 This is a side view of the folded state of this utility model.

Detailed Implementation Methods

[0039] The present invention will be further described below with reference to the accompanying drawings:

[0040] like Figures 1 to 5As shown, a stroller includes a bottom support frame 1, with a seat 11 for a child to sit on on the upper side of the bottom support frame 1, front wheels 12 and rear wheels 13 on the lower side of the bottom support frame 1, and an upwardly extending vertical rod 14 on the bottom support frame 1 and located in front of the seat 11. The upper end of the vertical rod 14 is provided with handles 15 extending laterally to both sides. The stroller also includes a support assembly 2 that can be detachably connected to the bottom support frame 1 and the handles 15. The support assembly 2 includes a rear support frame 21 that can be detachably connected to the rear of the bottom support frame 1, with a seat frame 22 for sitting on connected to the upper end of the rear support frame 21. The front side of the seat frame 22 is detachably connected to the handles 15, and a push rod assembly 3 is also connected to the rear side of the seat frame 22 or the upper end of the rear support frame 21. When the support assembly 2 is connected to the bottom support frame 1 and the handle 15, an adult can push the stroller using the push rod assembly 3. In this position, the child sits in the higher seat frame 22. When the support assembly 2 is removed from the bottom support frame 1 and the handle 15, the child can operate the handle 15 with both hands and sit in the lower seat 11, allowing the child to operate and play independently. Therefore, this stroller can be transformed to allow the child to play independently or be pushed by an adult, offering versatility.

[0041] like Figures 5 to 11As shown, the seat frame 22 includes a seat support 221 for seating, and an armrest 8 can be detachably connected to the seat support 221. The front end of the seat support 221 has a locking shell 222 that can be engaged with the end of the handle 15. A leg support frame 223, which can rotate relative to the locking shell 222 to support the child's legs, is connected to the outside of the locking shell 222. The leg support frame 223 has a connecting shell 224 fixedly connected to the locking shell 222. Within the space enclosed by the connecting shell 224 and the locking shell 222, a first locking pin 42 is provided that can engage or disengage with a first locking hole 41 at the end of the handle 15. A first pin 43 is provided on the locking pin 42. A rotating sleeve 44 is provided inside the connecting shell 224. An opening 45 with a first helical surface 451 is provided on the side wall of the rotating sleeve 44. The first pin 43 is inserted into the opening 45 and abuts against the first helical surface 451, so that when the rotating sleeve 44 rotates, the first pin 43 can be pushed by the first helical surface 451 to disengage the first locking pin 42 from the first locking hole 41. A first return spring 46 is also provided inside the connecting shell 224 to push the first locking pin 42 back to its original position. A driving member 47 that can drive the rotating sleeve 44 to rotate is provided on the leg support frame 223. When the seat frame 22 is connected to the handle 15, the first locking pin 42 engages with the first locking hole 41 to lock the seat frame 22 and the handle 15. When it is necessary to detach the seat frame 22 from the handle 15, simply operate the drive component 47 to rotate the rotating sleeve 44. When the rotating sleeve 44 rotates, it pushes the first pin 43 through the first helical surface 45, thereby driving the first locking pin 42 to move through the first pin 43, causing the first locking pin 42 to disengage from the first locking hole 41. Once the two are disengaged, the seat frame 22 can be removed upwards. For aesthetic purposes, the handle 15 is provided with decorative holes 18 arranged in a ring with the first locking hole 41.

[0042] like Figure 3 , Figures 5 to 11As shown, the connecting shell 224 is also provided with a second locking pin 51 that can slide relative to it and is exposed. The second locking pin 51 is provided with a second pin 52 that passes through the opening 45. The opening 45 and the side opposite to the first spiral surface 451 are provided with a second spiral surface 452 that can push the second pin 52 when the rotating sleeve 44 rotates, so that the second locking pin 51 and the first locking pin 42 move towards each other. One end of the first return spring 46 abuts against the first pin 43 and the other end abuts against the second pin 52. The push rod assembly 3 is provided with a second locking hole 53 that can engage with the second locking pin 51 after the seat frame 22 is disengaged from the handle 15 and the seat frame 22 rotates and moves closer to the push rod assembly 3. When the first locking pin 42 disengages from the first locking hole 41, the second locking pin 51 moves towards the first locking pin 42, and the first return spring 46 is compressed. At this time, the seat frame 22 can be disengaged from the handle 15, and the seat frame 22 can be rotated upward to a position close to the push rod assembly 3. When the set position is reached, the drive member 47 is released, the first return spring 46 returns to its original position and pushes the second locking pin 51 outward. The second locking pin 51 then engages with the second locking hole 53 on the push rod assembly 3 to position the seat frame 22. At this time, even if the child is sitting on the lower seat part 11, the adult can still push the stroller through the push rod assembly 3. Therefore, when the stroller is pushed by an adult, the child can sit on either the higher seat frame 22 or the lower seat part 11, allowing the user to choose according to their needs.

[0043] like Figure 11 As shown, a guide rod 48 is fixedly provided inside the connecting shell 224 and the snap-fit ​​shell 222. The guide rod 48 is provided with a guide groove 49 for the first pin 43 and the second pin 52 to slide inside, thereby ensuring that the first snap-fit ​​pin 42 and the second snap-fit ​​pin 51 move smoothly.

[0044] like Figures 6 to 9As shown, the driving component 47 includes a snap-fit ​​sleeve 471 that is sleeved on the outside of the rotating sleeve 44 and can drive the rotating sleeve 44 to rotate. The leg support frame 223 is provided with an exposed sliding frame 472 that can slide relative to it. A first pull rope 473 is provided between the sliding frame 472 and the snap-fit ​​sleeve 471, which can drive the snap-fit ​​sleeve 471 to rotate when the sliding frame 472 slides into the leg support frame 223. A second return spring 474 is provided between the sliding frame 472 and the leg support frame 223, which can push the sliding frame 472 to reset. A third return spring 475 is provided between the snap-fit ​​sleeve 471 and the connecting shell 224, which can push the snap-fit ​​sleeve 471 to rotate and reset. When the sliding frame 472 is pushed, the first pull rope 473 pulls the locking sleeve 471 to rotate. Since the locking sleeve 471 can drive the rotating sleeve 44 to rotate, the sliding frame 472 can cause the first locking pin 42 to disengage from the first locking hole 41 when it slides. If the seat frame 22 is in the position close to the push rod assembly 3, the sliding frame 472 can also cause the second locking pin 51 to disengage from the second locking hole 53. The locking sleeve 471 and the rotating sleeve 44 can be connected by a locking mechanism to allow them to rotate together.

[0045] like Figures 6 to 14 As shown, the snap-fit ​​housing 222 has at least two snap-fit ​​positions 225 along its circumference. The end of the sliding frame 472 is provided with a snap-fit ​​part 61 that can engage or disengage with the snap-fit ​​position 225. When the snap-fit ​​part 61 on the sliding frame 472 disengages from the snap-fit ​​position 225, the leg support frame 223 can rotate relative to the snap-fit ​​housing 222 to adjust the tilt angle of the leg support frame 223. When the set angle is reached, the snap-fit ​​part 61 can be snapped back into place with the snap-fit ​​position 225.

[0046] like Figures 6 to 14As shown, an exposed button 62 is slidably connected to the leg support frame 223. The button 62 includes an exposed pressing part 621 and a connecting block 622 connected to the pressing part 621. The connecting block 622 is provided with a blocking block 623. The sliding frame 472 is provided with a clearance groove 476 that allows the connecting block 622 to move relative to it. When the button 62 is pressed, the clearance groove 476 is opposite to the connecting block 622, allowing the sliding frame 472 to slide to the position where the drive locking sleeve 471 rotates. When the button 62 is not pressed, the clearance groove 476 is misaligned with the connecting block 622, and the blocking block 623 is opposite to the blocking surface 477 on the sliding frame 472, allowing the sliding frame 472 to slide only to the position where the engaging part 61 and the locking position 225 are disengaged. A fourth return spring 63 is provided between the button 62 and the leg support frame 223 to push the button 62 to reset. In this embodiment, since the sliding of the sliding frame 472 can disengage both the engaging part 61 from the locking position 225 and the first locking pin 42 from the first locking hole 41, a button 62 must be provided to ensure that the unlocking movement of the seat frame 22 from the handle 15 and the adjustment angle movement of the leg support frame 223 remain relatively independent. Specifically, when the button 62 is not pressed, the sliding frame 472 can only slide to the position where the engaging part 61 disengages from the locking position 225. At this position, the blocking surface 477 on the sliding frame 472 will abut against the blocking block 623 to prevent the sliding frame 472 from sliding further. At this time, the first pull rope 473 is in a slack state and cannot pull the locking sleeve 471 to rotate. At this time, the first locking pin 42 and the first locking hole 41 are still engaged, but the leg support frame 223 can be adjusted to an adjustable tilt angle. If it is necessary for the first locking pin 42 to disengage from the first locking hole 41, press the button 62 upwards to make the connecting block 622 face the relief groove 476. When the sliding frame 472 slides to the position where the engaging part 61 disengages from the locking position 225, since the connecting block 622 faces the relief groove 476 and the connecting block 622 can enter the relief groove 476, the sliding frame 472 can continue to slide. During the sliding process, the first pull rope 473 is tensioned and pulls the locking sleeve 471 to rotate, thereby causing the first locking pin 42 to disengage from the first locking hole 41.

[0047] like Figure 10 and Figure 13As shown, the leg support frame 223 is provided with a straight groove 226 and an inclined groove 227 identical to the straight groove 226. The sliding frame 472 is provided with a horizontal groove 478. A movable column 228 that can move within the straight groove 226 and the inclined groove 227 is inserted into the horizontal groove 478. The movable column 228 is connected to the locking sleeve 471 by the first pull rope 473. When the sliding frame 472 slides relative to the leg support frame 223, the groove wall of the horizontal groove 478 pushes the movable column 228 to move within the straight groove 226 and the inclined groove 227. When the movable column 228 moves within the straight groove 226, the first pull rope 473 is in a slack state. When the movable column 228 moves within the inclined groove 227, the first pull rope 473 is tensioned and pulls the locking sleeve 471 to rotate. When the sliding frame 472 is pushed, the wall of the transverse groove 478 pushes the moving column 228, which slides within the straight groove 226. At this time, the first pull rope 473 is in a slack state. When the moving column 228 moves to the end of the straight groove 226, the engaging part 61 disengages from the locking position 225, allowing adjustment of the tilt angle of the leg support frame 223. If button 62 is pressed at this time to align the connecting block 622 with the clearance groove 476, the sliding frame 472 can continue to slide, and the moving column 228 will enter the inclined groove 227. At this time, the first pull rope 473 will pull the locking sleeve 471 to rotate, thereby disengaging the first locking pin 42 from the first locking hole 41. Therefore, when only the tilt angle of the leg support frame 223 needs to be adjusted, only the sliding frame 472 is slid, without pressing button 62; when it is necessary for the first locking pin 42 to disengage from the first locking hole 41, button 62 is pressed and the sliding frame 472 is slid.

[0048] like Figures 15 to 21As shown, the rear support frame 21 includes a connecting seat 211. The connecting seat 211 and the rear of the bottom support frame 1 are provided with a first locking structure 71 for locking the two together. The push rod assembly 3 includes a push rod seat 31 rotatably connected to the rear end of the seat frame 22. A lower support rod 32 is fixedly connected to the push rod seat 31. A push rod 33 is rotatably connected to the upper end of the lower support rod 32. A second locking structure 72 for locking the two is provided between the push rod seat 31 and the connecting seat 211. A first connecting rod 212 rotatably connects the two together. A second connecting rod 213 rotatably connects the push rod seat 31 and the connecting seat 211 so that the rear support frame 21 can be folded. A third locking structure 73 is provided between the upper end of the second connecting rod 213 and the push rod seat 31 for locking the two together and can be unlocked when the push rod 33 rotates and folds relative to the lower support rod 32. After the second locking structure 72 is unlocked, the push rod 33 can rotate and approach the lower support rod 32. During the rotation and approach, the third locking structure 73 is also unlocked. The first connecting rod 212 and the second connecting rod 213 rotate relative to the bottom support frame 1 and the push rod seat 31, causing the rear support frame 21 to fold and approach the bottom support frame 1, thereby realizing the folding of the stroller and making the stroller easy to store or carry. It should be noted that before folding the stroller, the seat frame 22 needs to be detached from the handle 15, and the seat frame 22 needs to be rotated and approached onto the push rod assembly 3 and locked through the second locking hole 53 and the second locking pin 51.

[0049] like Figure 3 , Figure 19 and Figure 21 As shown in the figure, the bottom support frame 1 includes a rear support 16 and a front support 17 that can rotate relative to the rear support 16. The connecting seat 211 is detachably connected to the rear support 16. The vertical rod 14, the seat part 11, and the rear wheel 13 are all located on the rear support 16, and the front wheel 12 is located on the front support 17. A fourth locking structure 74 for locking the front support 17 and the rear support 16 is provided. To further reduce the size of the stroller when folded, the front support 17 can also rotate and fold relative to the rear support 16.

[0050] like Figure 5 , Figure 15 and Figure 18As shown, the first locking structure 71 includes an open slot 711 on the front side of the connecting seat 211, a locking rod 712 on the rear bracket 16 that can engage with the open slot 711, a sliding block 713 on the rear side of the connecting seat 211 that can slide relative to it, a locking block 715 at the lower end of the sliding block 713 that can engage or disengage with the locking hole 714 on the rear bracket 16, an exposed pressing block 716 at the upper end of the sliding block 713 that can push the sliding block 713 to slide, and a fifth return spring 717 inside the connecting seat 211 that can push the sliding block 713 to slide back to its original position. When the opening slot 711 engages with the locking rod 712 and the locking block 715 engages with the locking hole 714, the rear support frame 21 is locked onto the bottom support frame 1. Pressing the pressing block 716 disengages the locking block 715 from the locking hole 714. Then, rotating and lifting the push rod assembly 3 allows the support assembly 2 to be removed. Of course, this operation is only possible if the seat frame 22 is already disengaged from the handle 15. After the support assembly 2 is removed, the child can sit on the seat 11 and play independently.

[0051] like Figure 15 and Figure 16As shown, the second locking structure 72 includes multiple second locking grooves 721 arranged circumferentially at the lower end of the push rod 33, and multiple second engaging grooves 722 arranged circumferentially at the upper end of the lower support rod 32. A second locking gear 723 is slidably arranged between the push rod 33 and the lower support rod 32, capable of engaging simultaneously with the second engaging grooves 722 and the second locking grooves 721. A rotatable rotating block 724 is provided between the second locking gear 723 and the lower end of the push rod 33. Multiple second inclined grooves 725 are arranged circumferentially on the rotating block 724. A second inclined protrusion that cooperates with the second inclined grooves 725 is arranged circumferentially at the lower end of the push rod 33. When the rotating block 724 rotates, the second oblique protrusion 726 pushes the rotating block 724 to move laterally, thereby disengaging the second locking gear 723 from the second locking groove 721. A sixth return spring 727, capable of pushing the second locking gear 723 back to its original position, is provided between the upper end of the lower support rod 32 and the second locking gear 723. An operating block 728, which can slide relative to the hand push rod 33, is provided between the operating block 728 and the rotating block 724, capable of pulling the rotating block 724 to rotate. A seventh return spring 720, capable of pushing the operating block 728 back to its original position, is also provided between the operating block 728 and the hand push rod 33. During unlocking, pushing the operating block 728 causes the second pull rope 729 to pull the rotating block 724 to rotate. As the rotating block 724 rotates, it laterally pushes the second locking gear 723 out of the second locking groove 721. At this time, the first locking structure 71 is unlocked, and the hand push rod 33 can rotate and fold relative to the lower support rod 32. To avoid accidental operation, a double-lock structure 79 can be set up. The operating block 728 can only be pushed to slide after the double-lock structure is unlocked. The double-lock structure can adopt a traditional structure, which will not be described in detail here.

[0052] like Figure 15 and Figure 17As shown, the third locking structure 73 includes multiple third locking grooves 731 arranged circumferentially on the upper end of the second connecting rod 213, and multiple third engaging grooves 732 arranged circumferentially on the push rod seat 31. A third locking gear 733 is slidably arranged between the push rod seat 31 and the second connecting rod 213, capable of engaging with the third locking grooves 731 and the third engaging grooves 732 simultaneously. A rotatable rotating block 734 is provided between the third locking gear 733 and the push rod seat 31. Multiple third inclined grooves 735 are arranged circumferentially on the rotating block 734. A third locking groove 735 is arranged circumferentially on the push rod seat 31 to cooperate with the third inclined grooves 735. The three oblique protrusions 736, when the rotating block 734 rotates, push the rotating block 734 to move laterally, thereby causing the third locking gear 733 to disengage from the third engagement groove 732. An eighth return spring 737 that can push the third locking gear 733 to reset is provided between the upper end of the second connecting rod 213 and the third locking gear 733. The upper end of the lower support rod 32 is provided with an unlocking block 738 that can be pushed and rotated by the hand push rod 33 when it rotates to a set angle. A third pull rope 739 that can pull the rotating block 734 to rotate when the unlocking block 738 rotates is provided between the unlocking block 738 and the rotating block 734. When the push rod 33 rotates and folds relative to the lower support rod 32, the push rod 33 rotates to a certain angle and begins to push the unlocking block 738 to rotate. The unlocking block 738 then pulls the rotating block 734 to rotate via the third pull rope 739. During the rotation, the rotating block 734 pushes the third locking gear 733 to disengage from the third locking groove 732. At this time, the third locking structure 73 is unlocked, and the lower support rod 32 can rotate relative to the first connecting rod 212 and the second connecting rod 213. The lower ends of the first connecting rod 212 and the second connecting rod 213 rotate relative to the bottom support frame 1, thereby realizing the folding of the rear support frame 21. The entire folding process is easy to operate; simply rotating the push rod 33 relative to the lower support rod 32 is enough to unlock the third locking structure 73.

[0053] like Figure 19As shown, the fourth locking structure 74 includes multiple fourth locking grooves 741 arranged circumferentially on the front bracket 17, and multiple fourth engaging grooves 742 arranged circumferentially on the rear bracket 16. A fourth locking gear 743 is provided between the front bracket 17 and the rear bracket 16, which can engage with the fourth locking grooves and the fourth engaging grooves 742 simultaneously. A rotating block 744 is provided between the fourth locking gear 743 and the rear bracket 16, which can rotate and push the fourth locking gear 743 to disengage from the fourth engaging grooves 742 when rotating. The rotating block 744 has a circumferentially arranged... The stroller is equipped with a fourth inclined groove 745, and a fourth inclined protrusion 746 that mates with the fourth inclined groove 745 on the rear support 16. A ninth return spring 747, capable of pushing the fourth locking gear 743 back to its original position, is provided between the fourth locking gear 743 and the front support 17. A sliding seat 748, which can slide relative to the vertical rod 14, is provided on the vertical rod 14. A fourth pull rope 749, capable of pulling the rotating block 744 to rotate, is provided between the sliding seat 748 and the vertical rod 14. A tenth return spring 740, capable of pushing the sliding seat 748 back to its original position, is provided between the sliding seat 748 and the vertical rod 14. When the sliding seat 748 is pushed, the fourth pull rope 749 pulls the rotating block 744 to rotate, thereby causing the fourth locking gear 743 to disengage from the fourth locking groove 742, unlocking the fourth locking structure 74, and allowing the front support 17 to rotate and fold relative to the rear support 16, making the stroller smaller when folded.

[0054] 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 children's stroller, characterized in that: The stroller includes a bottom support frame (1), on the upper side of which is a seat (11) for a child to sit on. The bottom support frame (1) has a front wheel (12) and a rear wheel (13) on the lower side. A vertical rod (14) extending upward is provided on the bottom support frame (1) and in front of the seat (11). A handle (15) extending laterally to both sides is provided at the upper end of the vertical rod (14). The stroller also includes a support assembly (2) that can be detachably connected to the bottom support frame (1) and the handle (15). The support assembly (2) includes a rear support frame (21) detachably connected to the rear of the bottom support frame (1). A seat frame (22) for sitting is connected to the upper end of the rear support frame (21). The front side of the seat frame (22) is detachably connected to the handle (15). A push rod assembly (3) is also connected to the rear side of the seat frame (22) or the upper end of the rear support frame (21).

2. The stroller according to claim 1, characterized in that: The seat frame (22) includes a seat support (221) for sitting. The front end of the seat support (221) is provided with a snap-fit ​​shell (222) that can snap onto the end of the handle (15). The snap-fit ​​shell (222) is connected to a leg support frame (223) that can rotate relative to it to support the child's legs. The leg support frame (223) has a connecting shell (224) that is fixedly connected to the snap-fit ​​shell (222). The space enclosed by the connecting shell (224) and the snap-fit ​​shell (222) is provided with a first snap pin (42) that can engage or disengage with the first snap-fit ​​hole (41) at the end of the handle (15). A first pin (43) is passed through the first snap pin (42). The connecting shell (224) is provided with a rotating sleeve (44) that can rotate. The side wall of the rotating sleeve (44) is provided with an opening (45) having a first helical surface (451). The first pin (43) passes through the opening (45) and abuts against the first helical surface (451), so that when the rotating sleeve (44) rotates, it can push the first pin (43) through the first helical surface (451) to disengage the first locking pin (42) from the first locking hole (41). The connecting shell (224) is also provided with a first return spring (46) that can push the first locking pin (42) to reset. The leg support frame (223) is provided with a driving member (47) that can drive the rotating sleeve (44) to rotate.

3. The stroller according to claim 2, characterized in that: The connecting shell (224) is also provided with a second locking pin (51) that can slide relative to it and is exposed. The second locking pin (51) is provided with a second pin (52) that passes through the opening (45). The opening (45) and the side opposite to the first spiral surface (451) are provided with a second spiral surface (452) that can push the second pin (52) when the rotating sleeve (44) rotates so that the second locking pin (51) and the first locking pin (42) move towards each other. One end of the first return spring (46) abuts against the first pin (43) and the other end abuts against the second pin (52). The push rod assembly (3) is provided with a second locking hole (53) that can engage with the second locking pin (51) after the seat frame (22) is separated from the handle (15) and the seat frame (22) rotates and approaches relative to the push rod assembly (3).

4. The stroller according to claim 3, characterized in that: The connecting shell (224) and the snap-fit ​​shell (222) are fixedly provided with a guide rod (48), and the guide rod (48) is provided with a guide groove (49) for the first pin (43) and the second pin (52) to slide inside.

5. The stroller according to claim 3, characterized in that: The driving component (47) includes a snap-fit ​​sleeve (471) sleeved on the outside of the rotating sleeve (44) and capable of driving the rotating sleeve (44) to rotate. The leg support frame (223) is provided with an exposed sliding frame (472) that can slide relative to it. A first pull rope (473) is provided between the sliding frame (472) and the snap-fit ​​sleeve (471) to drive the snap-fit ​​sleeve (471) to rotate when the sliding frame (472) slides into the leg support frame (223). A second return spring (474) is provided between the sliding frame (472) and the leg support frame (223) to push the sliding frame (472) to reset. A third return spring (475) is provided between the snap-fit ​​sleeve (471) and the connecting shell (224) to push the snap-fit ​​sleeve (471) to rotate and reset.

6. The stroller according to claim 5, characterized in that: The snap-fit ​​housing (222) has at least two snap-fit ​​positions (225) along its circumference. The end of the sliding frame (472) has a snap-fit ​​part (61) that can engage or disengage with the snap-fit ​​positions (225). An exposed button (62) is slidably connected to the leg support frame (223). The button (62) includes an exposed pressing part (621) and a connecting block (622) connected to the pressing part (621). The connecting block (622) has a blocking block (623). The sliding frame (472) has a relief groove (476) that allows the connecting block (622) to move relatively within it. 2) When pressed, the relief groove (476) and the connecting block (622) are opposite to each other, so that the sliding frame (472) can slide to the position where the drive snap sleeve (471) rotates. When the button (62) is not pressed, the relief groove (476) and the connecting block (622) are misaligned and the blocking block (623) and the blocking surface (477) on the sliding frame (472) are opposite to each other, so that the sliding frame (472) can only slide to the position where the engaging part (61) and the locking position (225) are disengaged. A fourth reset spring (63) is provided between the button (62) and the leg support frame (223) to push the button (62) to reset.

7. The stroller according to claim 6, characterized in that: The leg support frame (223) is provided with a straight groove (226) and an inclined groove (227) identical to the straight groove (226). The sliding frame (472) is provided with a horizontal groove (478). A movable column (228) that can move within the straight groove (226) and the inclined groove (227) is inserted into the horizontal groove (478). The first pull rope (473) is connected between the movable column (228) and the snap-fit ​​sleeve (471). The sliding frame (472) When the moving column (228) slides relative to the leg support frame (223), the groove wall of the horizontal groove (478) pushes the moving column (228) to move in the straight groove (226) and the inclined groove (227). When the moving column (228) moves in the straight groove (226), the first pull rope (473) is in a slack state. When the moving column (228) moves in the inclined groove (227), the first pull rope (473) is tensioned and pulls the snap-fit ​​sleeve (471) to rotate.

8. The stroller according to claim 3, characterized in that: The rear support frame (21) includes a connecting seat (211), and the connecting seat (211) and the bottom support frame (1) are provided with a first locking structure (71) for locking the two together. The push rod assembly (3) includes a push rod seat (31) rotatably connected to the rear end of the seat frame (22), and a lower support rod (32) is fixedly connected to the push rod seat (31). A hand push rod (33) is rotatably connected to the upper end of the lower support rod (32), and a second locking structure (71) is provided between the hand push rod (33) and the lower support rod (32) for locking the two together. The locking structure (72) includes a first connecting rod (212) rotatably connected between the push rod seat (31) and the connecting seat (211), and a second connecting rod (213) rotatably connected between the push rod seat (31) and the connecting seat (211) to allow the rear support frame (21) to fold. The upper end of the second connecting rod (213) is provided with a third locking structure (73) between the push rod seat (31) and the push rod seat (31) for locking the two and being unlocked when the push rod (33) rotates and folds relative to the lower support rod (32).

9. The stroller according to claim 8, characterized in that: The bottom support frame (1) includes a rear support (16) and a front support (17) that can rotate relative to the rear support (16). The connecting seat (211) is detachably connected to the rear support (16). The vertical rod (14), the seat (11) and the rear wheel (13) are all located on the rear support (16). The front wheel (12) is located on the front support (17). A fourth locking structure (74) for locking the front support (17) and the rear support (16) is provided.

10. The stroller according to claim 9, characterized in that: The first locking structure (71) includes an open slot (711) on the front side of the connecting seat (211), a locking rod (712) on the rear bracket (16) that can engage with the open slot (711), a sliding block (713) on the rear side of the connecting seat (211) that can slide relative to it, a locking block (715) at the lower end of the sliding block (713) that can engage or disengage with the locking hole (714) on the rear bracket (16), an exposed pressing block (716) at the upper end of the sliding block (713) that can push the sliding block (713) to slide, and a fifth return spring (717) in the connecting seat (211) that can push the sliding block (713) to slide back.

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