Stroller framework

Abstract

A bottom supporting frame comprises a front foot rod and a rear foot rod, the upper end of the front foot rod is provided with a front connecting base, the upper end of the rear foot rod is provided with a rear connecting base rotationally connected with the front connecting base around a first axis, and the upper end of the bottom supporting frame is further rotationally connected with a push rod assembly around a second axis. A transmission assembly is arranged between the push rod assembly and the bottom supporting frame and can pull the front foot rod to rotate and approach the rear foot rod when the push rod assembly rotates and approaches relative to the rear foot rod, and the rear side of the seat frame is rotatably connected with the bottom supporting frame around a third axis. A traction rod capable of pulling the seat frame to rotate and approach the front foot rod when the front foot rod rotates and approaches the rear foot rod is arranged between the seat frame and the transmission assembly, the upper end of the traction rod is pivoted to the front side of the seat frame around a fourth axis, and the lower end of the traction rod is pivoted to the transmission assembly around a fifth axis and located between the front foot rod and the rear foot rod. The folding chair is simple in structure, convenient to fold and operate and small in size after being folded.

Description

TECHNICAL FIELD

[0001] The utility model relates to a child's pushchair framework. BACKGROUND

[0002] The child's pushchair is the common product in the growth process of baby. The current child's pushchair can generally unfold or fold, and in the unfolded state, it is used for children to travel, and in the folded state, it is convenient to carry or store.

[0003] The child's pushchair framework structure on the market at present is various, and the folding movement principles are not same, and many child's pushchair frameworks still have the problem that the volume is large after folding, and it is inconvenient to carry or store.

[0004] Therefore, the utility model just puts forward based on above technical problem. TECHNICAL CONTENT

[0005] The utility model aims at overcoming the insufficient of prior art, and provides a child's pushchair framework, which has simple structure, convenient folding operation and small volume after folding.

[0006] The utility model is realized through the following technical schemes:

[0007] A child's pushchair framework can be moved from an unfolded position to a folded position after unlocking a locking device, comprising a bottom support frame with wheels, the bottom support frame comprises a front leg rod and a rear leg rod, the upper end of the front leg rod is provided with a front connecting seat, the upper end of the rear leg rod is provided with a rear connecting seat which is rotatably connected with the front connecting seat around a first axis, the upper end of the bottom support frame is further rotatably connected with a push rod assembly around a second axis, a transmission assembly is arranged between the push rod assembly and the bottom support frame, which can pull the front leg rod to rotate and close to the rear leg rod when the push rod assembly rotates and closes to the rear leg rod, the child's pushchair framework further comprises a seat frame, the rear side of the seat frame is rotatably connected with the bottom support frame around a third axis, a pulling rod is arranged between the seat frame and the transmission assembly, which can pull the seat frame to rotate and close to the front leg rod when the front leg rod rotates and closes to the rear leg rod, the upper end of the pulling rod is pivoted to the front side of the seat frame around a fourth axis, and the lower end of the pulling rod is pivoted to the transmission assembly around a fifth axis and located between the front leg rod and the rear leg rod.

[0008] The push rod assembly comprises a push handle rod and a handle rod connected to the upper end of the push handle rod, the lower end of the push handle rod is provided with a push rod connecting seat, and the push rod connecting seat is rotatably connected with the bottom support frame around the second axis.

[0009] The transmission assembly comprises a front transmission rod, a front end of the front transmission rod is rotatably connected with the front leg rod around a sixth axis, a rear end of the front transmission rod is provided with a rear transmission rod between the front leg rod and the rear leg rod, one end of the rear transmission rod is rotatably connected with the front transmission rod around a seventh axis, the other end is rotatably connected with the rear leg rod around an eighth axis, the push handle rod is rotatably connected with an upper transmission rod around a ninth axis I, a lower end of the upper transmission rod is rotatably connected with the front transmission rod or the rear transmission rod around a tenth axis, and a lower end of the traction rod is rotatably connected with the front transmission rod or the rear transmission rod around the fifth axis.

[0010] The front transmission rod, the rear transmission rod, the upper transmission rod and the traction rod are coaxially rotatably connected.

[0011] The push rod connecting seat is rotatably connected with the rear connecting seat around the second axis, the seat frame is rotatably connected with the rear connecting seat around the third axis, and the rear connecting seat is further rotatably connected with a front handrail around the third axis.

[0012] The locking device comprises a first locking assembly arranged between the push rod connecting seat and the rear connecting seat, a second locking assembly arranged between the push rod connecting seat and the seat connecting seat at the rear end of the seat frame, and a third locking assembly arranged between the seat connecting seat and a handrail seat at the lower end of the front handrail, and when the first locking assembly is unlocked, the second locking assembly and the third locking assembly are unlocked in linkage.

[0013] The first locking assembly comprises a first clamping groove arranged on the rear connecting seat in the circumferential direction, a second clamping groove arranged on the push rod connecting seat in the circumferential direction, a clamping spline arranged in the space surrounded by the push rod connecting seat and the rear connecting seat and capable of being clamped with the first clamping groove and the second clamping groove at the same time, a movable block arranged between the push rod connecting seat and the clamping spline and capable of rotating and moving transversely to push the clamping spline to be separated from the second clamping groove when rotating, a first helical surface arranged on the movable block in the circumferential direction, a first inclined protrusion arranged on the push rod connecting seat and abutting against the first helical surface and capable of pushing the movable block to move transversely when the movable block rotates, and a first reset spring arranged between the clamping spline and the rear connecting seat and capable of pushing the clamping spline to move transversely and reset.

[0014] The second locking assembly comprises a first clamping hole arranged on the seat connecting seat, a second clamping hole arranged on the push rod connecting seat, a clamping piece arranged between the push rod connecting seat and the movable block and capable of being pressed by the movable block to move transversely, the clamping piece comprises a clamping seat abutting against the movable block, the clamping seat is provided with a clamping column capable of being arranged in the second clamping hole and the first clamping hole, and the push rod connecting seat is provided with a second reset spring arranged between the clamping seat and the movable block and capable of pushing the clamping seat to make the clamping column separated from the first clamping hole when the movable block pushes the clamping spline to move.

[0015] The third locking assembly comprises a first locking groove arranged on the armrest base in the circumferential direction, a locking block arranged on the seat connecting base in the circumferential direction, a handrail locking tooth arranged in the space surrounded by the seat connecting base and the push rod connecting base and capable of moving transversely and simultaneously engaging with the locking block and the first locking groove, a second helical surface arranged on the handrail locking tooth in the circumferential direction, a second inclined protrusion arranged on the push rod connecting base and abutting against the second helical surface and capable of pushing the second helical surface when the push rod assembly rotates towards the rear rod to make the handrail locking tooth disengage from the first locking groove, and a third reset spring arranged between the seat connecting base and the handrail locking tooth and capable of pushing the handrail locking tooth to move and reset.

[0016] The push handle rod is provided with a lower connecting base at the upper end, the handle rod is provided with an upper connecting base rotatably connected with the lower connecting base at the lower end, a fourth locking assembly is arranged between the upper connecting base and the lower connecting base, the fourth locking assembly comprises a first locking groove arranged on the upper connecting base in the circumferential direction, a second locking groove arranged on the lower connecting base in the circumferential direction, a locking tooth arranged in the space surrounded by the upper connecting base and the lower connecting base and capable of moving transversely and simultaneously engaging with the first locking groove and the second locking groove, a driving block arranged between the upper connecting base and the locking tooth and capable of rotating and pushing the locking tooth to disengage from the first locking groove when rotating, a third helical surface arranged on the driving block in the circumferential direction, a third inclined protrusion arranged on the upper connecting base and abutting against the third helical surface and capable of pushing the driving block to move transversely when the driving block rotates, a fourth reset spring arranged between the lower connecting base and the locking tooth and capable of pushing the locking tooth to move and reset, a sliding block exposed and capable of sliding is arranged at the upper end of the handle rod, a first pull rope capable of pulling the driving block to rotate is arranged between the sliding block and the driving block, a fifth reset spring capable of pushing the sliding block to reset is arranged between the sliding block and the handle rod, two lock structures are further arranged on the handle rod, the two lock structures comprise a knob capable of sliding along the handle rod, a pushing rod capable of pushing the sliding block and preventing the sliding block from sliding into the handle rod is arranged on the knob, a clearance groove capable of aligning with the pushing rod after the knob slides is arranged on the sliding block, when the clearance groove aligns with the pushing rod, the sliding block can be operated to slide into the handle rod, a sixth reset spring capable of pushing the knob to slide and reset is arranged between the knob and the handle rod, a rotating ring capable of rotating is arranged between the locking tooth and the lower connecting base, a cross rod transversely extending into the upper connecting base is arranged on the rotating ring, a protrusion capable of pushing the cross rod to make the rotating ring rotate after the upper connecting base rotates a set angle relative to the lower connecting base is arranged on the upper connecting base, a second pull rope passing through the push handle rod and capable of pulling the movable block to rotate when the rotating ring rotates is arranged between the cross rod and the movable block.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. When the stroller frame of this utility model is folded, the push rod assembly rotates and moves closer to the rear leg. During this process, the transmission assembly drives the front leg to rotate and move closer to the rear leg, and the traction component also causes the seat frame to rotate and move closer to the front leg. Finally, the push rod assembly, the front leg, and the seat frame all move closer to the rear leg. The entire folding operation only requires the push rod assembly to rotate backward to achieve linkage folding. The folding operation is simple, and the folded size is very small, making it easy to carry or store.

[0019] 2. When the stroller frame of this utility model is folded, the wheels and handlebars rest against the ground, which can keep the stroller upright in the folded state, making it convenient to store. Moreover, when the stroller frame is folded, the front handlebar can be stored or unfolded separately. When unfolded, it is convenient for users to carry the folded stroller by the front handlebar.

[0020] 3. The folding operation of this utility model children's stroller can be performed with one hand, which is very convenient and quick. After being folded, it is very lightweight and easy to move. [Attached Image Description]

[0021] Figure 1 This is a perspective view of the unfolded state of this utility model;

[0022] Figure 2 This is a side view of the utility model in its unfolded state;

[0023] Figure 3 This is one of the side views during the folding process of this utility model;

[0024] Figure 4 This is the second side view of the present invention during the folding process;

[0025] Figure 5 This is one of the side views of the folded state of this utility model;

[0026] Figure 6 This is the second side view of the folded state of this utility model;

[0027] Figure 7 This is one of the exploded views of the components of this utility model;

[0028] Figure 8 This is the second exploded view of a component of this utility model;

[0029] Figure 9 This is the third exploded view of the components of this utility model;

[0030] Figure 10 This is the fourth exploded view of the components of this utility model;

[0031] Figure 11 This is the fifth exploded view of the components of this utility model;

[0032] Figure 12 is a perspective view of the component of the utility model;

[0033] Figure 13 is the sixth exploded view of the component of the utility model;

[0034] Figure 14 is the seventh exploded view of the component of the utility model.

CONCRETE IMPLEMENTATION

[0035] The utility model will be further described below in combination with the drawings:

[0036] As Figures 1 to 6 shown, a kind of child stroller framework can be moved from unfolded position to folding position after locking device is unlocked, including bottom support frame 1 with wheel 15, the bottom support frame 1 includes front leg 11 and rear leg 12, the upper end of the front leg 11 is equipped with front connecting seat 13, the upper end of the rear leg 12 is equipped with rear connecting seat 14, which is rotatably connected with front connecting seat 13 around first axis A, the upper end of the bottom support frame 1 is also rotatably connected with push rod assembly 2 around second axis B, transmission assembly 3 between push rod assembly 2 and bottom support frame 1 can be pulled back to the rear leg 12 when push rod assembly 2 is rotated to draw the front leg 11 to the rear leg 12, and in the process of being rotated to draw the rear leg 12, transmission assembly 3 drives the front leg 11 to the rear leg 12, so that push rod assembly 2 and the front leg 11 are all drawn to the rear leg 12.

[0037] As Figures 1 to 6 shown, the child stroller framework further includes seat frame 4, and the seat frame 4 is used to support seat for children to sit on. The rear side of the seat frame 4 is rotatably connected with the bottom support frame 1 around third axis C, and the seat frame 4 and transmission assembly 3 are provided with traction rod 5, which can be pulled to the front leg 11 when the front leg 11 is rotated to draw the rear leg 12, and the upper end of the traction rod 5 is pivoted on the front side of the seat frame 4 around fourth axis D, and the lower end of the traction rod 5 is pivoted on transmission assembly 3 between the front leg 11 and the rear leg 12 around fifth axis E. In the process of being rotated to draw the rear leg 12, transmission assembly 3 will pull traction rod 5 to move, so as to drive the seat frame 4 to the front leg 11 by traction rod 5, realize the linkage folding of seat frame 4, so that the child stroller framework is folded conveniently and quickly.

[0038] As Figure 1 and Figure 2As shown, the push rod assembly 2 comprises a push handle rod 21 and a handle rod 22 connected to the upper end of the push handle rod 21. In this embodiment, the handle rod 22 is rotatably connected to the push handle rod 21. The upper end of the push handle rod 21 is provided with a lower connecting seat 24, and the lower end of the handle rod 22 is provided with an upper connecting seat 25 rotatably connected to the lower connecting seat 24. The lower end of the push handle rod 21 is provided with a push rod connecting seat 23, which is rotatably connected to the bottom support frame 1 around the second axis B.

[0039] As shown in Figures 1 to 6 The transmission assembly 3 comprises a front transmission rod 31 rotatably connected to the front leg rod 11 around the sixth axis F at the front end, and a rear transmission rod 32 provided between the rear end of the front transmission rod 31 and the rear leg rod 12. One end of the rear transmission rod 32 is rotatably connected to the front transmission rod 31 around the seventh axis G, and the other end is rotatably connected to the rear leg rod 12 around the eighth axis H. The upper end of the push handle rod 21 is rotatably connected to an upper transmission rod 33 around the ninth axis I, and the lower end of the upper transmission rod 33 is rotatably connected to the front transmission rod 31 or the rear transmission rod 32 around the tenth axis J. The lower end of the traction rod 5 is rotatably connected to the front transmission rod 31 or the rear transmission rod 32 around the fifth axis E. In this embodiment, the front transmission rod 31, the rear transmission rod 32, the upper transmission rod 33 and the traction rod 5 are coaxially rotatably connected, ensuring smooth and flexible expansion or folding of the child stroller frame, and the entire child stroller frame structure is compact, small in size and easy to carry after folding. When the push rod assembly 2 is folded relative to the rear leg rod 12, the push handle rod 21 pushes the upper end of the upper transmission rod 33 downward, and the upper transmission rod 33 pushes the joint position of the front transmission rod 31 and the rear transmission rod 32 downward, so that the originally expanded front transmission rod 31 and the rear transmission rod 32 are folded together, thereby pulling the front leg rod 11 to rotate and close to the rear leg rod 12. In this process, the joint position of the front transmission rod 31 and the rear transmission rod 32 also pulls the traction rod 5 downward, and the traction rod 5 pulls the front side of the seat frame 4, so that the seat frame 4 also rotates relative to the rear leg rod 12 and moves towards the front leg rod 11. The entire transmission assembly 3 has a simple structure, making the child stroller frame folding flexible.

[0040] As shown in Figures 1 to 6 and Figure 14As shown, the push rod connecting seat 23 is rotatably connected with the rear connecting seat 14 around the second axis B, the seat frame 4 is rotatably connected with the rear connecting seat 14 around the third axis C, and the front handrail 6 is rotatably connected with the rear connecting seat 14 around the third axis C. The front handrail 6 is used for the child to hold to ensure safety. As shown, the front handrail 6 comprises a handrail rod 62 and a handrail seat 61, the handrail seat 61 is rotatably connected with the rear connecting seat 14, the handrail rod 62 is detachably connected with the handrail seat 61, the handrail seat 61 is provided with a clamping hole 631, the handrail rod 62 is provided with a clamping block 632 which can slide relative to the handrail rod 62 and is clamped with the clamping hole 631, and the handrail rod 62 is further provided with an eighth reset spring 633 which can push the clamping block 632 to move and reset. When the clamping block 632 is pressed to exit the clamping hole 631, the handrail rod 62 can be detached, which is convenient for the user to take or put the child out of or into the child stroller. When the child is taken out or put in, the handrail rod 62 is connected to the handrail seat 61 again.

[0041] As shown in Figure 1 , Figure 2 and Figure 13 , the seat frame 4 is further rotatably connected with a leg support frame 42 at the front side, and the leg support frame 42 can support the legs of the child to make the child ride comfortably. The leg support frame 42 and the seat frame 4 are provided with a positioning structure which can position the leg support frame 42, the positioning structure comprises a first positioning slot 431 provided on the seat frame 4 in the circumferential direction, the leg support frame 42 is provided with a second positioning slot (not shown in the figure) in the circumferential direction, and the space surrounded by the leg support frame 42 and the seat frame 4 is provided with a clamping gear 433 which can be clamped with the second positioning slot and the first positioning slot 431 at the same time, the leg support frame 42 is provided with a button 434 which is exposed and can push the clamping gear 433 to disengage from the second positioning slot, and the seat frame 4 and the clamping gear 433 are further provided with a seventh reset spring 435 which can push the clamping gear 433 to move and reset. When the button 434 is pressed, the button 434 pushes the clamping gear 433 to exit the second positioning slot on the leg support frame 42, at this time, the leg support frame 42 can be rotated to adjust its position, when adjusted to the appropriate position, the button 434 is released, the seventh reset spring 435 pushes the clamping gear 433 to reset, and the clamping gear 433 is clamped with the first positioning slot 431 and the second positioning slot again, so that the position of the leg support frame 42 is kept. In this embodiment, one side of the teeth of the clamping gear 433 is provided with an inclined wall 432, so that the leg support frame 42 can be pulled in one direction without pressing the button 434, and the adjustment operation is more convenient.

[0042] As shown in Figure 1 , Figure 2 , Figure 9 and Figure 10As shown, the lower connecting seat 24 is provided with a still rotatably connected canopy pole support seat 91, the canopy pole support seat 91 is connected with a canopy support pole 92, the canopy pole support seat 91 is provided with a first wave tooth 93 along the circumferential direction, the canopy pole support seat 91 and the lower connecting seat 24 are provided with a transversely movable moving block 94, the moving block 94 is provided with a second wave tooth 95 along the circumferential direction, the second wave tooth 95 can engage with the first wave tooth 93, the moving block 94 and the lower connecting seat 24 are provided with an elastic element 96, the elastic element 96 can push the moving block 94 to make the second wave tooth 95 keep engaging with the first wave tooth 93. The canopy support pole 92 is used to support a canopy for sunshade or windproof, when the canopy is not needed for sunshade or windproof, the canopy support pole 92 can be rotated, the first wave tooth 93 and the second wave tooth 94 are disengaged and engaged with each other in the process of rotating the canopy support pole 92, the moving block 94 is squeezed to move back and forth, until it is rotated to the appropriate position, the elastic element 96 makes the second wave tooth 95 keep engaging with the first wave tooth 93.

[0043] As shown in Figure 7 and Figure 8 The locking device includes a first locking assembly 71 arranged between the push rod connecting seat 23 and the rear connecting seat 14, a second locking assembly 72 arranged between the push rod connecting seat 23 and the seat connecting seat 41 of the rear end of the seat frame 4, and a third locking assembly 73 arranged between the seat connecting seat 41 and the handrail seat 61 of the lower end of the front handrail 6. When the first locking assembly 71 is unlocked, the second locking assembly 72 and the third locking assembly 73 are unlocked at the same time. The arrangement of the first locking assembly 71 between the rear connecting seat 14 and the push rod connecting seat 23 and the second locking assembly 72 between the seat frame 4 and the push rod connecting seat 23 can make the child stroller frame more stable and reliable in the unfolded state, reduce the shaking caused by the gap between parts, and ensure the use of the child stroller more stable and reliable.

[0044] As shown in Figure 7 and Figure 8As shown, the first locking assembly 71 comprises a first locking slot 711 provided on the rear connecting seat 14 in the circumferential direction, a second locking slot 712 provided on the push rod connecting seat 23 in the circumferential direction, a locking spline 713 provided in the space surrounded by the push rod connecting seat 23 and the rear connecting seat 14 and capable of moving transversely and being engaged with the first locking slot 711 and the second locking slot 712 simultaneously, a movable block 714 provided between the push rod connecting seat 23 and the locking spline 713 and capable of rotating and moving transversely to push the locking spline 713 and disengage the second locking slot 712 when rotating, a first helical surface 715 provided on the movable block 714 in the circumferential direction, a first inclined protrusion 716 provided on the push rod connecting seat 23 and capable of abutting against the first helical surface 715 and pushing the movable block 714 to move transversely when the movable block 714 rotates, and a first reset spring 717 provided between the locking spline 713 and the rear connecting seat 14 and capable of pushing the locking spline 713 to move transversely and reset; the second locking assembly 72 comprises a first locking hole 721 provided on the seat connecting seat 41, a second locking hole 722 provided on the push rod connecting seat 23, a locking piece 723 provided between the push rod connecting seat 23 and the movable block 714 and capable of moving transversely when being pressed by the movable block 714, the locking piece 723 comprising a locking seat 7231 abutting against the movable block 714, the locking seat 7231 being provided with a locking column 7232 capable of being arranged in the second locking hole 722 and the first locking hole 721, and a second reset spring 724 provided between the push rod connecting seat 23 and the locking seat 7231 and capable of pushing the locking seat 7231 to disengage the locking column 7232 from the first locking hole 721 when the movable block 714 pushes the locking spline 713 to move; the third locking assembly 73 comprises a first locking slot 731 provided on the armrest seat 61 in the circumferential direction, a locking block 732 provided on the seat connecting seat 41 in the circumferential direction, an armrest locking tooth 733 provided in the space surrounded by the seat connecting seat 41 and the push rod connecting seat 23 and capable of moving transversely and being engaged with the locking block 732 and the first locking slot 731 simultaneously, a second helical surface 734 provided on the armrest locking tooth 733 in the circumferential direction, a second inclined protrusion 735 provided on the push rod connecting seat 23 and capable of abutting against the second helical surface 734 and pushing the second helical surface 734 to disengage the armrest locking tooth 733 from the first locking slot 731 when the push rod assembly 2 rotates and approaches the rear leg 12, and a third reset spring 736 provided between the seat connecting seat 41 and the armrest locking tooth 733 and capable of pushing the armrest locking tooth 733 to move and reset.The fourth locking assembly 74 is arranged between the upper connecting seat 25 and the lower connecting seat 24, and comprises a first locking groove 741 arranged on the upper connecting seat 25 in the circumferential direction, a second locking groove 742 arranged on the lower connecting seat 24 in the circumferential direction, a locking tooth 743 arranged in the space formed by the upper connecting seat 25 and the lower connecting seat 24 and capable of being moved transversely and simultaneously engaged with the first locking groove 741 and the second locking groove 742, a driving block 744 arranged between the upper connecting seat 25 and the locking tooth 743 and capable of rotating and pushing the locking tooth 743 away from the first locking groove 741 when rotating, a third helical surface 745 arranged on the driving block 744 in the circumferential direction, a third inclined protrusion 746 arranged on the upper connecting seat 25 and capable of abutting against the third helical surface 745 and pushing the driving block 744 to move transversely when the driving block 744 rotates, and a fourth reset spring 747 arranged between the lower connecting seat 24 and the locking tooth 743 and capable of pushing the locking tooth 743 to move and reset. The upper end of the handle rod 22 is provided with a sliding block 81 exposed and capable of sliding, a first pull rope 82 is arranged between the sliding block 81 and the driving block 744 and capable of pulling the driving block 744 to rotate, a fifth reset spring 83 is arranged between the sliding block 81 and the handle rod 22 and capable of pushing the sliding block 81 to reset, and a two-way lock structure is further arranged on the handle rod 22, which comprises a push button 841 capable of sliding along the handle rod 22, a pushing rod 842 arranged on the push button 841 and capable of pushing the sliding block 81 to prevent the sliding block 81 from sliding into the handle rod 22, a clearance groove 843 arranged on the sliding block 81 and capable of aligning with the pushing rod 842 after the push button 841 slides, and the sliding block 81 can be operated to slide into the handle rod 22 when the clearance groove 843 aligns with the pushing rod 842, and a sixth reset spring 844 is arranged between the push button 841 and the handle rod 22 and capable of pushing the push button 841 to slide and reset. The locking tooth 743 and the lower connecting seat 24 are provided with a rotating ring 751 capable of rotating, the rotating ring 751 is provided with a horizontal rod 752 extending into the upper connecting seat 25, the upper connecting seat 25 is provided with a protrusion 753 capable of pushing the horizontal rod 752 to rotate the rotating ring 751 after the upper connecting seat 25 rotates a set angle relative to the lower connecting seat 24, and the horizontal rod 752 and the movable block 714 are provided with a second pull rope 754 arranged in the push handle rod 21 and capable of pulling the movable block 714 to rotate when the rotating ring 751 rotates.

[0045] As Figures 1 to 12 , the folding working principle is:

[0046] First push the toggle button 841 transversely to move to make the push rod 842 align with the displacement slot 843 on the sliding block 81, at this time you can pinch the sliding block 81 to move, the sliding block 81 in the process of moving to pull the driving block 744 to rotate through the first pull rope 82, the driving block 744 in the process of rotating, the third inclined protrusion 746 on the upper connecting seat 25 pushes the third helical surface 745 on the driving block 744, so that the driving block 744 moves transversely, the driving block 744 pushes the locking tooth 743 to move transversely to disengage from the first locking slot 741 on the upper connecting seat 25, at this time the fourth locking assembly 74 is unlocked, the handle bar 22 can be folded relative to the push bar 21. When the handle bar 22 is rotated to a certain angle, the protrusion 753 on the upper connecting seat 25 touches the cross bar 752, and in the process of continuing to rotate the handle bar 22, the protrusion 753 pushes the cross bar 752 to make the rotating ring 751 rotate, the second pull rope 754 on the cross bar 752 pulls the movable block 714 between the push rod connecting seat 23 and the rear connecting seat 14 to rotate, the first inclined protrusion 716 on the push rod connecting seat 23 pushes the first helical surface 715 on the movable block 714, so that the movable block 714 moves transversely, the movable block 714 pushes the locking spline 713 to disengage from the second locking slot 712 on the push rod connecting seat 23, at this time the first return spring 717 is compressed, the first locking assembly 71 is unlocked, and in the process, because the movable block 714 moves transversely and no longer applies a pushing force to the locking seat 7231, the second return spring 724 pushes the locking seat 7231 to move transversely to make the locking column 7232 disengage from the first locking hole 721 on the seat connecting seat 41, at this time the second locking assembly 72 is unlocked, at this time the push rod assembly 2 can be folded backward. In the process of rotating the push rod connecting seat 23, the second inclined protrusion 735 on the push rod connecting seat 23 pushes the second helical surface 734 on the handrail locking tooth 733, so that the handrail locking tooth 733 moves transversely to disengage from the first locking slot 731 on the handrail seat 61, at this time the front handrail 6 can also be folded relative to the rear connecting seat 14. Therefore, by pinching the sliding block 81 and rotating the handle bar 22 forward, the push rod assembly 2, the front leg rod 1, the seat frame 4 and the front handrail 6 can be folded close to the rear leg rod 12, the entire folding operation only needs to be performed by one hand, and the folding operation is very convenient and fast. When the child stroller frame is in the folded state, the handle bar 22 supports the wheels 15 on the ground, so that the folded child stroller frame stands, is convenient to store, and the front handrail 6 can be freely rotated, and the user can move the folded child stroller by holding the front handrail 6, which is also very convenient to move.

[0047] The above describes the embodiment in combination with the drawings, but the utility model is not limited to the above embodiment, within the knowledge range of ordinary skilled in the art, various changes can be made without departing from the purpose.

Claims

1. A child's pushchair frame which is movable from an unfolded position to a folded position after unlocking of a locking device, characterised in that: The child stroller frame comprises a bottom support frame (1) with wheels (15), the bottom support frame (1) comprises a front leg (11) and a rear leg (12), the upper end of the front leg (11) is provided with a front connecting seat (13), the upper end of the rear leg (12) is provided with a rear connecting seat (14) which is rotatably connected with the front connecting seat (13) around a first axis (A), the upper end of the bottom support frame (1) is further rotatably connected with a push rod assembly (2) around a second axis (B), the push rod assembly (2) and the bottom support frame (1) are provided with a transmission assembly (3) which can pull the front leg (11) to rotate and close to the rear leg (12) when the push rod assembly (2) rotates and closes to the rear leg (12), the child stroller frame further comprises a seat frame (4), the rear side of the seat frame (4) is rotatably connected with the bottom support frame (1) around a third axis (C), the seat frame (4) and the transmission assembly (3) are provided with a pulling rod (5) which can pull the seat frame (4) to rotate and close to the front leg (11) when the front leg (11) rotates and closes to the rear leg (12), the upper end of the pulling rod (5) is pivotally connected to the front side of the seat frame (4) around a fourth axis (D), and the lower end of the pulling rod (5) is pivotally connected to the transmission assembly (3) around a fifth axis (E) and is located between the front leg (11) and the rear leg (12).

2. The child's carriage frame of claim 1, wherein: The push rod assembly (2) comprises a push handle rod (21) and a handle rod (22) connected to the upper end of the push handle rod (21), the lower end of the push handle rod (21) is provided with a push rod connecting seat (23), and the push rod connecting seat (23) is rotatably connected with the bottom support frame (1) around the second axis (B).

3. The child's carriage frame of claim 2, wherein: The transmission assembly (3) comprises a front transmission rod (31), the front end of the front transmission rod (31) is rotatably connected with the front leg (11) around a sixth axis (F), the rear end of the front transmission rod (31) and the rear leg (12) are provided with a rear transmission rod (32), one end of the rear transmission rod (32) is rotatably connected with the front transmission rod (31) around a seventh axis (G), the other end of the rear transmission rod (32) is rotatably connected with the rear leg (12) around an eighth axis (H), the push handle rod (21) is rotatably connected with an upper transmission rod (33) around a ninth axis (I), the lower end of the upper transmission rod (33) is rotatably connected with the front transmission rod (31) or the rear transmission rod (32) around a tenth axis (J), and the lower end of the pulling rod (5) is rotatably connected with the front transmission rod (31) or the rear transmission rod (32) around the fifth axis (E).

4. The child's carriage frame of claim 3, wherein: The front transmission rod (31), the rear transmission rod (32), the upper transmission rod (33) and the pulling rod (5) are coaxially rotatably connected.

5. A child's pushchair frame according to any one of claims 2 to 4, wherein: The push rod connecting seat (23) is rotatably connected with the rear connecting seat (14) around the second axis (B), the seat frame (4) is rotatably connected with the rear connecting seat (14) around the third axis (C), and the rear connecting seat (14) is further rotatably connected with a front handrail (6) around the third axis (C).

6. The stroller frame of claim 5, wherein: The locking device comprises a first locking assembly (71) arranged between the push rod connecting seat (23) and the rear connecting seat (14), a second locking assembly (72) arranged between the seat connecting seat (41) at the rear end of the seat frame (4) and the push rod connecting seat (23), and a third locking assembly (73) arranged between the seat connecting seat (41) and the handrail seat (61) at the lower end of the front handrail (6), and when the first locking assembly (71) is unlocked, the second locking assembly (72) and the third locking assembly (73) are unlocked in linkage.

7. The stroller frame of claim 6, wherein: The first locking assembly (71) comprises a first clamping groove (711) arranged in the circumferential direction on the rear connecting seat (14), a second clamping groove (712) arranged in the circumferential direction on the push rod connecting seat (23), a clamping spline (713) arranged in the space surrounded by the push rod connecting seat (23) and the rear connecting seat (14) and capable of being transversely moved and clamped with the first clamping groove (711) and the second clamping groove (712) at the same time, a movable block (714) arranged between the push rod connecting seat (23) and the clamping spline (713) and capable of rotating and transversely moving to push the clamping spline (713) and the second clamping groove (712) apart when rotating, a first helical surface (715) arranged in the circumferential direction on the movable block (714), a first inclined protrusion (716) arranged on the push rod connecting seat (23) and capable of abutting against the first helical surface (715) and pushing the movable block (714) to move transversely when the movable block (714) rotates, and a first reset spring (717) arranged between the clamping spline (713) and the rear connecting seat (14) and capable of pushing the clamping spline (713) to move transversely and reset.

8. The child's carriage frame of claim 7 wherein: The second locking assembly (72) comprises a first clamping hole (721) arranged on the seat connecting seat (41), a second clamping hole (722) arranged on the push rod connecting seat (23), a clamping piece (723) arranged between the push rod connecting seat (23) and the movable block (714) and capable of being pushed by the movable block (714) to move transversely, the clamping piece (723) comprises a clamping seat (7231) abutting against the movable block (714), the clamping seat (7231) is provided with a clamping column (7232) capable of being arranged in the second clamping hole (722) and the first clamping hole (721), and the push rod connecting seat (23) and the clamping seat (7231) are provided with a second reset spring (724) capable of pushing the clamping seat (7231) to make the clamping column (7232) and the first clamping hole (721) disengage when the movable block (714) pushes the clamping spline (713) to move.

9. The stroller frame of claim 8, wherein: The third locking assembly (73) comprises a first locking groove (731) arranged on the armrest base (61) in the circumferential direction, the seat connecting base (41) is provided with a locking block (732) in the circumferential direction, the space surrounded by the seat connecting base (41) and the push rod connecting base (23) is provided with an armrest locking tooth (733) capable of moving horizontally and capable of being engaged with the locking block (732) and the first locking groove (731) at the same time, the armrest locking tooth (733) is provided with a second helical surface (734) in the circumferential direction, the push rod connecting base (23) is provided with a second inclined protrusion (735) abutting against the second helical surface (734) and capable of pushing the second helical surface (734) when the push rod assembly (2) rotates to close to the rear leg (12) so that the armrest locking tooth (733) is disengaged from the first locking groove (731), and the seat connecting base (41) and the armrest locking tooth (733) are further provided with a third reset spring (736) capable of pushing the armrest locking tooth (733) to move and reset.

10. The stroller frame of claim 7, wherein: The push handle rod (21) is provided with a lower connecting seat (24) at the upper end, the handle rod (22) is provided with an upper connecting seat (25) rotatably connected with the lower connecting seat (24) at the lower end, the fourth locking assembly (74) is arranged between the upper connecting seat (25) and the lower connecting seat (24), the fourth locking assembly (74) comprises a first locking groove (741) arranged on the upper connecting seat (25) in the circumferential direction, the lower connecting seat (24) is provided with a second locking groove (742) in the circumferential direction, the space surrounded by the upper connecting seat (25) and the lower connecting seat (24) is provided with a locking tooth (743) capable of moving transversely and capable of being engaged with the first locking groove (741) and the second locking groove (742) at the same time, the upper connecting seat (25) and the locking tooth (743) are provided with a driving block (744) capable of rotating and capable of pushing the locking tooth (743) and the first locking groove (741) to disengage when rotating, the driving block (744) is provided with a third helical surface (745) in the circumferential direction, the upper connecting seat (25) is provided with a third inclined protrusion (746) abutting against the third helical surface (745) and capable of pushing the driving block (744) to move transversely when the driving block (744) rotates, the lower connecting seat (24) and the locking tooth (743) are provided with a fourth reset spring (747) capable of pushing the locking tooth (743) to move and reset, the handle rod (22) is provided with a sliding block (81) exposed and capable of sliding at the upper end, the sliding block (81) and the driving block (744) are provided with a first pull rope (82) capable of pulling the driving block (744) to rotate, the sliding block (81) and the handle rod (22) are provided with a fifth reset spring (83) capable of pushing the sliding block (81) to reset, the handle rod (22) is further provided with a two-way lock structure, the two-way lock structure comprises a knob (841) capable of sliding along the handle rod (22), the knob (841) is provided with a pushing rod (842) capable of pushing the sliding block (81) to prevent the sliding block (81) from sliding into the handle rod (22), the sliding block (81) is provided with a clearance groove (843) capable of aligning with the pushing rod (842) after the knob (841) slides, when the clearance groove (843) aligns with the pushing rod (842), the sliding block (81) can be operated to slide into the handle rod (22), the knob (841) and the handle rod (22) are provided with a sixth reset spring (844) capable of pushing the knob (841) to slide and reset, the locking tooth (743) and the lower connecting seat (24) are provided with a rotating ring (751) capable of rotating, the rotating ring (751) is provided with a horizontal rod (752) horizontally extending into the upper connecting seat (25), the upper connecting seat (25) is provided with a protrusion (753) capable of pushing the horizontal rod (752) to make the rotating ring (751) rotate after the upper connecting seat (25) rotates a set angle relative to the lower connecting seat (24),The horizontal rod (752) is provided with a second pull rope (754) which is arranged in the push handle rod (21) and can pull the movable block (714) to rotate when the rotating ring (751) rotates.

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