Stroller framework

Abstract

The utility model discloses a stroller framework which comprises a foldable bottom supporting frame, the bottom supporting frame comprises rear legs with rear wheels, the upper ends of the rear legs are fixedly provided with connecting bases, the connecting bases are rotatably connected with front legs around a first axis, the lower ends of the front legs are provided with front wheels, and the connecting bases are rotatably connected with push rod assemblies around a second axis. A transmission mechanism capable of driving the front leg to rotate and fold towards the rear leg when the push rod assembly rotates and folds relative to the rear leg is arranged between the push rod assembly and the bottom supporting frame, the transmission mechanism comprises a first transmission rod and a second transmission rod, and the front end of the first transmission rod is rotatably connected with the front leg around a third axis; the rear end of the first transmission rod is rotatably connected with the front end of the second transmission rod around a fourth axis, the rear end of the second transmission rod is rotatably connected with the rear leg around a fifth axis, and a third transmission rod hinged to the push rod assembly and the second transmission rod is arranged between the push rod assembly and the second transmission 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 problems of inconvenient folding operation, large volume after folding, and inconvenient carrying or storing.

[0004] Therefore, the utility model just is based on above technical problem and proposes. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the prior art's insufficient, 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 a locking device is unlocked, comprising a foldable bottom support frame, the bottom support frame comprises a rear leg with a rear wheel, a connecting seat is fixedly arranged on the upper end of the rear leg, a front leg is rotatably connected to the connecting seat around a first axis, a front wheel is arranged on the lower end of the front leg, a push rod assembly is rotatably connected to the connecting seat around a second axis, a transmission mechanism is arranged between the push rod assembly and the bottom support frame, which can drive the front leg to rotate and fold towards the rear leg when the push rod assembly rotates and folds relative to the rear leg, the transmission mechanism comprises a first transmission rod and a second transmission rod, the front end of the first transmission rod is rotatably connected to the front leg around a third axis, the rear end of the first transmission rod is rotatably connected to the front end of the second transmission rod around a fourth axis, the rear end of the second transmission rod is rotatably connected to the rear leg around a fifth axis, and a third transmission rod is hingedly connected to the push rod assembly and the second transmission rod.

[0008] The upper end of the third transmission rod is rotatably connected to the push rod assembly around a sixth axis, and the lower end of the third transmission rod is rotatably connected to the second transmission rod around a seventh axis, so that when the push rod assembly rotates and folds relative to the rear leg, the third transmission rod pushes the second transmission rod and the first transmission rod to move downwards at the joint position.

[0009] The child stroller frame further comprises a seat frame, the seat frame comprises a seat rod, the rear side of the seat rod is rotatably connected with the third transmission rod around the eighth axis, and the front side of the seat rod is provided with a linkage piece hinged with the connecting seat.

[0010] The linkage piece, the connecting seat and the front leg are coaxially hinged around the first axis.

[0011] The upper end of the third transmission rod is rotatably connected with a front handrail, and the inner side of the push rod assembly is provided with a positioning protrusion capable of abutting against and positioning the front handrail when the child stroller frame is in the unfolded position.

[0012] The push rod assembly comprises a lower push rod, the lower end of the lower push rod is fixedly provided with a hinged seat, the hinged seat is rotatably connected with the connecting seat around the second axis, and the upper end of the lower push rod is rotatably connected with a U-shaped hand push rod.

[0013] The locking device comprises a horizontal shaft fixedly arranged on the connecting seat, the hinged seat is rotatably connected with a locking block capable of abutting against or being separated from the horizontal shaft at a position deviated from the second axis, the locking device is kept locked when the locking block abuts against the horizontal shaft, the locking device is unlocked when the locking block is separated from the horizontal shaft, the lower push rod is internally provided with a first pull rope capable of pulling the locking block to rotate and be separated from the horizontal shaft, and the hinged seat is further internally provided with a first reset spring capable of pushing the locking block to rotate and reset.

[0014] The hand push rod and the lower push rod are further provided with a locking assembly, the locking assembly comprises a first locking groove arranged on the upper end of the lower push rod in the circumferential direction, the lower end of the hand push rod is provided with a second locking groove in the circumferential direction, a locking gear capable of being simultaneously locked with the first locking groove and the second locking groove is arranged in the space surrounded by the lower end of the hand push rod and the upper end of the lower push rod, a rotating block capable of pushing the locking gear to be separated from the first locking groove when rotating is arranged between the locking gear and the upper end of the lower push rod, the rotating block is connected with a second pull rope, the upper end of the hand push rod is provided with an operation block connected with the second pull rope, and the second reset spring capable of pushing the locking gear to move and reset is arranged between the lower end of the hand push rod and the locking gear.

[0015] The lower end of the hand push rod is further provided with a protruding shaft penetrating through the locking gear and the rotating block, the protruding shaft is fixedly connected with a rotating block capable of rotating with the protruding shaft, and the eccentric position of the rotating block is connected with the first pull rope, so that the locking block can be pulled to rotate when the hand push rod is folded.

[0016] The lower end of the hand push rod is further provided with a supporting rod extending downward and capable of cooperating with the front wheel to keep the folded child stroller frame standing when the child stroller frame is in the folded position.

[0017] Compared with the prior art, the utility model have following advantages: the utility model discloses children's pushchair framework when folding, push rod subassembly relatively rear leg rotates and draws close, in this process, push rod subassembly presses down third transmission rod, and third transmission rod lower extreme then pushes down second transmission rod, make second transmission rod and rear leg relatively rotate, and at the same time, second transmission rod and first transmission rod relatively rotate and two meet positions move down, and first transmission rod drives front leg to rotate and draw close to rear leg, thereby realizes children's pushchair framework folding, whole folding operation is very convenient and fast, just need to push rod subassembly to rotate down, and whole children's pushchair framework structure is simple, and the volume is very small after folding, convenient to carry and store. In addition, in the process that push rod subassembly rotates and draws close to rear leg, third transmission rod drags seat rod, thereby make seat rod also can draw close to rear leg, realize seat frame interlocking folding. BRIEF DESCRIPTION OF DRAWINGS

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

[0019] Figure 2 is the utility model in unfolded position's side view;

[0020] Figure 3 is the utility model in folding process's side view;

[0021] Figure 4 is the utility model in folding position's side view;

[0022] Figure 5 is the utility model's partial sectional view;

[0023] Figure 6 is one of the utility model's component exploded view;

[0024] Figure 7 is the second of the utility model's component exploded view;

[0025] Figure 8 is the third of the utility model's component exploded view;

[0026] Figure 9 is the utility model's component perspective view.

CONCRETE IMPLEMENTATION

[0027] The utility model will be further described below in connection with the drawings:

[0028] As Figures 1 to 4As shown, a stroller frame can be moved from an unfolded position to a folded position after the locking device is unlocked. It includes a foldable bottom support frame 1, which includes rear legs 11 with rear wheels 111. A connecting seat 12 is fixedly mounted on the upper end of the rear legs 11. A front leg 13 is rotatably connected to the connecting seat 12 about a first axis A. A front wheel 131 is located at the lower end of the front leg 13. A push rod assembly 2 is rotatably connected to the connecting seat 12 about a second axis B. A transmission mechanism 3 is provided between the push rod assembly 2 and the bottom support frame 1, which drives the front leg 13 to rotate and fold towards the rear leg 11 when the push rod assembly 2 rotates and folds relative to the rear leg 11. The transmission mechanism 3 allows the push rod assembly 2 to rotate and fold towards the rear leg 11 when it rotates and folds relative to the rear leg 11, thus achieving ease of operation. In this embodiment, the transmission mechanism 3 includes a first transmission rod 31 and a second transmission rod 32. The front end of the first transmission rod 31 is rotatably connected to the front leg 13 around a third axis C. The rear end of the first transmission rod 31 is rotatably connected to the front end of the second transmission rod 32 around a fourth axis D. The rear end of the second transmission rod 32 is rotatably connected to the rear leg 11 around a fifth axis E. A third transmission rod 33 is provided between the push rod assembly 2 and the second transmission rod 32 and is hinged to both. When folding, the push rod assembly 2 rotates downwards around the second axis B relative to the rear leg 11 and moves closer together. During this process, the push rod assembly 2 rotates relative to the third transmission rod 33 and presses the third transmission rod 33 downwards. The lower end of the third transmission rod 33 pushes the second transmission rod 32 downwards, causing the second transmission rod 32 to rotate relative to the rear leg 11. At the same time, the second transmission rod 32 rotates relative to the first transmission rod 31 and the position where the two meet moves downwards. The front end of the first transmission rod 31 rotates relative to the front leg 13 and drives the front leg 13 to rotate and move closer to the rear leg 11, thereby realizing the folding of the stroller frame. The entire folding operation is very convenient and quick, requiring only the push rod assembly 2 to rotate downwards. Moreover, the entire stroller frame structure is simple, and the folded size is also small, making it easy to carry and store.

[0029] like Figures 1 to 4 As shown, the push rod assembly 2 includes a lower push rod 21, with a hinge seat 22 fixedly mounted at its lower end. The hinge seat 22 and the connecting seat 12 are rotatably connected around the second axis B. A U-shaped push rod 23 is rotatably connected to the upper end of the lower push rod 21. The lower end of the push rod 23 is further provided with a downward-extending support rod 233 that engages with the front wheel 131 when the stroller frame is in the folded position, keeping the folded stroller frame upright. When the stroller frame is in the folded position, the support rod 233 provides support on the ground, forming a fulcrum and preventing the folded stroller frame from tipping over, making it convenient for users to carry or store.

[0030] like Figures 1 to 4As shown, the upper end of the third transmission rod 33 is rotatably connected with the push rod assembly 2 around the sixth axis F, and the lower end of the third transmission rod 33 is rotatably connected with the second transmission rod 32 around the seventh axis G, so that when the push rod assembly 2 is folded relative to the rear leg 11, the third transmission rod 33 pushes the second transmission rod 32 and the first transmission rod 31 to move downward, and then the front leg 13 is folded relative to the rear leg 13, and the folding is flexible.

[0031] As shown, Figures 1 to 4 In order to make the children ride comfortably, the child stroller frame further comprises a seat frame 4, the seat frame 4 comprises a seat rod 41, the rear side of the seat rod 41 is rotatably connected with the third transmission rod 33 around the eighth axis H, and the front side of the seat rod 41 is provided with a linkage piece 42 hinged with the connecting seat 12, and the linkage piece 42, the connecting seat 12 and the front leg 13 are coaxially hinged around the first axis A. During the folding of the push rod assembly 2 relative to the rear leg 11, the third transmission rod 33 pulls the seat rod 41, so that the rear side of the seat rod 41 rotates relative to the third transmission rod 33, and the front side of the seat rod 41 rotates relative to the linkage piece 42, so that the seat rod 41 can also be folded on the rear leg 11, and the linkage folding of the seat frame 4 is realized. Of course, the seat frame can not be provided, and a flexible seat pocket is hung on the push rod assembly 2 for the children to ride.

[0032] As shown, Figure 1 and Figure 9 The upper end of the third transmission rod 33 is rotatably connected with a front handrail 5, so that the children can hold the front handrail 5 when riding, and safety is ensured. The inner side of the push rod assembly 2 is provided with a positioning lug 6 which can abut against and position the front handrail 5 when the child stroller frame is in the unfolded position. When the child stroller frame is unfolded, the positioning lug 6 abuts against the front handrail 5 to position and lock the front handrail 5, and when the child stroller frame is folded, the positioning lug 6 is separated from the front handrail 5.

[0033] As shown, Figures 5 to 8As shown, the locking device comprises a horizontal shaft 71 fixed on the connecting seat 12, and a locking block 72 rotatably connected on the hinged seat 22 and deviated from the second axis B, and capable of abutting against or being separated from the horizontal shaft 71, when the locking block 72 abuts against the horizontal shaft 71, the locking device is locked, when the locking block 72 is separated from the horizontal shaft 71, the locking device is unlocked, the push rod 21 is internally provided with a first pull rope 73 capable of pulling the locking block 72 to rotate and be separated from the horizontal shaft 71, and the hinged seat 22 is internally further provided with a first reset spring 74 capable of pushing the locking block 72 to rotate and reset. Since the locking block 72 is rotatably connected at a position deviated from the second axis B, when the locking block 72 abuts against the horizontal shaft 71 on the connecting seat 12, the push rod assembly 2 cannot rotate relative to the connecting seat 12, so that the child stroller framework is locked at the unfolded position, when folding is needed, the locking block 72 is pulled to rotate by the first pull rope 73, after the locking block 72 is separated from the horizontal shaft 71, the push rod assembly 2 can rotate relative to the connecting seat 12 to fold the child stroller framework.

[0034] As Figure 7 and Figure 8As shown, the hand pushing rod 23 and the lower pushing rod 21 are further provided with a locking assembly 8, the locking assembly 8 comprises a first locking slot 81 provided on the upper end of the lower pushing rod 21 in the circumferential direction, the lower end of the hand pushing rod 23 is provided with a second locking slot 82 in the circumferential direction, the space surrounded by the lower end of the hand pushing rod 23 and the upper end of the lower pushing rod 21 is provided with a locking gear 83 capable of being locked with the first locking slot 81 and the second locking slot 82 at the same time, the locking gear 83 and the upper end of the lower pushing rod 21 are provided with a rotating block 84 capable of pushing the locking gear 83 to be separated from the first locking slot 81 when rotating, in the embodiment, the rotating block 84 is provided with a plurality of inclined grooves 841 in the circumferential direction, the locking gear 83 is provided with an inclined protrusion 831 matched with the inclined grooves 841, thus, the locking gear 83 can be pushed to move horizontally when the rotating block 84 rotates. The rotating block 84 is connected with a second pulling rope 85, the upper end of the hand pushing rod 23 is provided with an operating block 86 connected with the second pulling rope 85, the lower end of the hand pushing rod 23 and the locking gear 83 are provided with a second reset spring 87 capable of pushing the locking gear 83 to move and reset, the lower end of the hand pushing rod 23 is further provided with a protruding shaft 231 penetrating through the locking gear 83 and the rotating block 84, the protruding shaft 231 is fixedly connected with a rotating block 232 capable of rotating with it, the eccentric position of the rotating block 232 is connected with the first pulling rope 73 to make the hand pushing rod 23 rotate to fold to pull the locking block 72 to rotate. When the user presses the operating block 86, the operating block 86 pulls the rotating block 84 to rotate through the second pulling rope 85, the rotating block 84 rotates to push the locking gear 83 to be separated from the first locking slot 81 horizontally, at this time, the hand pushing rod 23 can be rotated to fold relative to the lower pushing rod 21. The hand pushing rod 23 drives the rotating block 232 to rotate in the rotating process, the rotating block 232 drives the first pulling rope 73 in the eccentric position to move in the rotating process, so that the first pulling rope 73 pulls the locking block 72 to be separated from the horizontal shaft 71, to realize the unlocking of the locking device. Therefore, when the child stroller framework is folded, the locking assembly 8 and the locking device can be unlocked in linkage only by pressing the operating block 86 and rotating the hand pushing rod 23, and then the child stroller framework is folded, so that the folding operation is simple and fast.

[0035] The above embodiment is described in detail in combination with the drawings, but the utility model is not limited to the above embodiment, and various changes can be made within the knowledge range possessed by ordinary skilled in the technical field 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 utility model provides a kind of child stroller, including collapsible bottom support frame (1), the bottom support frame (1) includes rear leg (11) with rear wheel (111), the rear leg (11) upper end is fixed with connecting seat (12), the connecting seat (12) is rotatably connected with front leg (13) around first axis (A), the front leg (13) lower end is equipped with front wheel (131), the connecting seat (12) is rotatably connected with push rod assembly (2) around second axis (B), the push rod assembly (2) and bottom support frame (1) between being equipped with when push rod assembly (2) is folded relative to rear leg (11) and can drive front leg (13) to be folded to rear leg (11) transmission mechanism (3), the transmission mechanism (3) includes first transmission rod (31) and second transmission rod (32), the first transmission rod (31) front end is rotatably connected with front leg (13) around third axis (C), the first transmission rod (31) rear end is rotatably connected with second transmission rod (32) front end around fourth axis (D), the second transmission rod (32) rear end is rotatably connected with rear leg (11) around fifth axis (E), the push rod assembly (2) and second transmission rod (32) between being equipped with with the third transmission rod (33) articulated to both.

2. The child's carriage frame of claim 1, wherein: The third transmission rod (33) upper end is rotatably connected with push rod assembly (2) around sixth axis (F), the third transmission rod (33) lower end is rotatably connected with second transmission rod (32) around seventh axis (G), so that when push rod assembly (2) is folded relative to rear leg (11) third transmission rod (33) pushes second transmission rod (32) and the first transmission rod (31) with the position of interface moves downward.

3. The child's carriage frame of claim 1 wherein: Also package seat frame (4), the seat frame (4) includes seat rod (41), the seat rod (41) rear side is rotatably connected with third transmission rod (33) around eighth axis (H), the seat rod (41) front side and connecting seat (12) between being equipped with with the articulated link (42) articulated to both.

4. The child's carriage frame of claim 3, wherein: The articulated link (42), connecting seat (12) and front leg (13) are coaxially articulated around first axis (A).

5. The stroller frame of claim 1, wherein: The third transmission rod (33) upper end is rotatably connected with front handrail (5), the push rod assembly (2) inner side is equipped with when child stroller framework is in unfolded position and can abut against front handrail (5) and the positioning of front handrail (5) positioning boss (6).

6. A child's pushchair frame according to any one of claims 1 to 5, wherein: The push rod assembly (2) includes lower push rod (21), the lower push rod (21) lower end is fixed with articulated seat (22), the articulated seat (22) is rotatably connected with connecting seat (12) around second axis (B), the lower push rod (21) upper end is rotatably connected with U-shaped hand push rod (23).

7. The stroller frame of claim 6, wherein: The locking device comprises a horizontal shaft (71) fixed on the connecting seat (12), a locking block (72) rotatably connected on the hinged seat (22) and deviated from the second axis (B) and capable of abutting against or separating from the horizontal shaft (71), the locking device is locked when the locking block (72) abuts against the horizontal shaft (71), and the locking device is unlocked when the locking block (72) separates from the horizontal shaft (71), the push-down rod (21) is provided with a first pull rope (73) capable of pulling the locking block (72) to rotate and separate from the horizontal shaft (71), and the hinged seat (22) is further provided with a first reset spring (74) capable of pushing the locking block (72) to rotate and reset.

8. The child's carriage frame of claim 7 wherein: The hand push rod (23) and the push-down rod (21) are further provided with a locking assembly (8), the locking assembly (8) comprises a first locking groove (81) provided on the upper end of the push-down rod (21) in the circumferential direction, the lower end of the hand push rod (23) is provided with a second locking groove (82) in the circumferential direction, a locking gear (83) capable of simultaneously locking the first locking groove (81) and the second locking groove (82) is arranged in the space surrounded by the lower end of the hand push rod (23) and the upper end of the push-down rod (21), the locking gear (83) and the upper end of the push-down rod (21) are provided with a rotating block (84) capable of pushing the locking gear (83) to separate from the first locking groove (81) when rotating, the rotating block (84) is connected with a second pull rope (85), the upper end of the hand push rod (23) is provided with an operation block (86) connected with the second pull rope (85), and the lower end of the hand push rod (23) and the locking gear (83) are provided with a second reset spring (87) capable of pushing the locking gear (83) to move and reset.

9. The stroller frame of claim 8, wherein: The lower end of the hand push rod (23) is further provided with a protruding shaft (231) penetrating through the locking gear (83) and the rotating block (84), the protruding shaft (231) is fixedly connected with a rotating block (232) capable of rotating with the protruding shaft (231), and the eccentric position of the rotating block (232) is connected with the first pull rope (73) so that the locking block (72) can be pulled to rotate when the hand push rod (23) is rotated and folded.

10. The stroller frame of claim 6, wherein: The lower end of the hand push rod (23) is further provided with a supporting rod (233) extending downward and capable of cooperating with the front wheel (131) when the child stroller framework is in the folded position to keep the folded child stroller framework standing.

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