Stroller frame

Abstract

The utility model discloses a stroller frame which comprises rear legs, the upper ends of the rear legs are rotatably connected with front legs around a first axis, the lower ends of the front legs and the rear legs are provided with wheels, the upper ends of the rear legs are rotatably connected with supporting rods around a second axis, the upper ends of the supporting rods are connected with hand push rods, and the hand push rods are connected with the wheels. The upper end of the supporting rod E is rotatably hinged to the hand push rod around a third axis and is close to the position of the lower end of the hand push rod, a transmission rod hinged to the hand push rod and the rear leg is arranged between the lower end of the hand push rod and the rear leg, a protruding part protruding forwards is arranged at the lower end of the transmission rod, and a linkage rod hinged to the protruding part and the front leg is arranged between the protruding part and the front leg. The stroller frame further comprises a seat frame, the rear end of the seat frame is rotatably connected with the rear legs around a fourth axis, and a sliding portion capable of sliding up and down along the front legs is arranged on the front portion of the seat frame. The folding chair is simple in structure, smooth in folding and small in size after being folded.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of children's pushchair frame. BACKGROUND

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

[0003] Children's pushchair frame is the important component of children's pushchair, its structure determines whether children's pushchair unfolds or folds smoothly, also determines the size of space occupied by children's pushchair after folding. The structure of children's pushchair frame on the market is various, not identical. Therefore, the utility model provides a new children's pushchair frame different from prior art. UTILIT Y MODEL CONTENTS

[0004] The utility model aims at overcoming the insufficient of prior art, provide a kind of children's pushchair frame, it is simple in structure, folds smoothly, and the volume of small children's pushchair frame after folding.

[0005] The utility model is realized through the following technical schemes:

[0006] A kind of children's pushchair frame, after the unlocking of locking device, it can be moved from unfolded position to folded position, including rear leg, the rear leg upper end is rotatably connected with front leg around first axis, the lower end of front leg and rear leg is equipped with wheel, the rear leg upper end is rotatably connected with strut around second axis, the upper end of strut is connected with hand push rod, and, the upper end of strut is rotatably linked on hand push rod and is close to the position of hand push rod lower end around third axis, transmission rod is equipped between the lower end of hand push rod and rear leg, and the transmission rod lower end is equipped with the protruding part that protrudes to forward side, the protruding part and front leg are equipped with linkage rod, which is hinged, the children's pushchair frame further includes seat frame, the rear end of seat frame is rotatably connected with rear leg around fourth axis, and the front part of seat frame is equipped with sliding part, which can slide up and down along front leg.

[0007] The front leg includes front support rod and strip-shaped seat fixed on front support rod, the strip-shaped seat is equipped with sliding groove for sliding part to slide inside, the upper end of strip-shaped seat is equipped with sliding block, which can be pushed by sliding part to slide when sliding part slides upwards, and the first reset spring is arranged between sliding block and strip-shaped seat, which can push sliding block to slide downwards when children's pushchair frame is folded.

[0008] The sliding part is protruded column on seat frame, and the lower end of sliding block abuts on the upper side of protruded column.

[0009] The rotatable connecting position of the transmission rod and the rear leg is provided with a torsion spring, one end of the torsion spring is connected to the transmission rod, the other end of the torsion spring is connected to the rear leg, and when the child stroller frame is in the unfolded position, the torsion spring is in a deformed state.

[0010] The seat frame is further connected with a pull-out frame capable of sliding relative to the inside and outside of the seat frame.

[0011] The child stroller frame further comprises a handrail assembly, the handrail assembly comprises a U-shaped handrail rod, the rear end of the handrail rod is hingedly connected to the middle part of the transmission rod, and a connecting piece is arranged between the handrail rod and the support rod and close to the rear end of the handrail rod.

[0012] The first connecting shell and the second connecting shell surround a space, a locking gear capable of moving transversely in the space and capable of being engaged with the first locking slot and the second locking slot at the same time is arranged in the space, a movable block capable of rotating and capable of pushing the locking gear to be separated from the first locking slot when rotating is arranged between the locking gear and the first connecting shell, and a second reset spring capable of pushing the locking gear to be transversely reset is further arranged between the locking gear and the second connecting shell.

[0013] The upper end of the hand pushing rod is provided with an operation switch, a pull rope capable of pulling the movable block to rotate is arranged between the operation switch and the eccentric position of the movable block, a plurality of inclined slots are arranged on the movable block in the circumferential direction, and an inclined protrusion capable of cooperating with the inclined slots and capable of pushing the movable block to move transversely when the movable block rotates is arranged on the first connecting shell.

[0014] The central part of the movable block is provided with a limiting slot, and a limiting block is arranged on the first connecting shell and inserted into the limiting slot and capable of abutting against the slot wall of the limiting slot to limit the rotating angle of the movable block.

[0015] Compared with the prior art, the child stroller frame has the following advantages:

[0016] 1、The child stroller frame of the utility model makes the hand pushing rod rotate forward and press down the hand pushing rod when folding, the lower end of the hand pushing rod, the upper end of the support rod and the upper end of the transmission rod are close to the lower end of the rear leg, the lower end of the transmission rod rotates relative to the rear leg, the protruding part on the transmission rod is raised upward to pull the front leg to rotate relative to the rear leg and close to the rear leg through the linkage rod, in this process, the front leg exerts force on the sliding part on the seat frame to make the sliding part slide downward along the front leg, the rear end of the seat frame rotates relative to the rear leg, so that the seat frame also folds and closes relative to the front leg and the rear leg, and finally the overall folding of the child stroller frame is realized.

[0017] 2、The utility model discloses child stroller frame when folding, the spring in strip -shaped seat can push the slide block and slide down, and the slide block pushes the sliding part, makes the child stroller frame folding and slide to the sliding part a certain push auxiliary action, makes seat frame relative front leg more smooth sliding, avoids the child stroller frame folding and appears the jamming phenomenon.

[0018] 3、The utility model discloses child stroller frame still includes handrail subassembly, when transmission rod rotates relative rear leg and hand push pole and folds, transmission rod then pulls handrail pole rear end, and handrail pole then rotates with connecting piece, and connecting piece just rotates relative support pole, and handrail subassembly can also linkage fold, make the whole child stroller frame folding operation simple and smooth.

DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the perspective view of the utility model;

[0020] Figure 2 It is the side view of the utility model;

[0021] Figure 3 It is the section view of the utility model in unfolded state;

[0022] Figure 4 It is the perspective view in folding process of the utility model;

[0023] Figure 5 It is the perspective view in folding position of the utility model;

[0024] Figure 6 It is one of exploded view of the utility model's parts;

[0025] Figure 7 It is the second exploded view of the utility model's parts;

[0026] Figure 8 It is the third exploded view of the utility model's parts;

[0027] Figure 9 It is the fourth exploded view of the utility model's parts.

DETAILED DESCRIPTION

[0028] The utility model will be further described below in conjunction with the drawings:

[0029] As Figure 1 And Figure 5 Shown, a kind of child stroller frame, after locking device is unlocked, it can be moved from unfolded position to folding position, after installing seat pad (not shown in drawing) and other articles on child stroller frame, then it is for children to sit in unfolded position, in folding position, then it is convenient to carry or store.

[0030] As Figures 1 to 6As shown, the child stroller frame of the embodiment comprises a rear leg 11, an upper end of which is rotatably connected with a front leg 12 around a first axis A, and the front leg 12 and the rear leg 11 can be unfolded or folded. A lower end of each of the front leg 12 and the rear leg 11 is provided with a wheel 13. An upper end of the rear leg 11 is rotatably connected with a support rod 2 around a second axis B. An upper end of the support rod 2 is connected with a hand pushing rod 3, and the upper end of the support rod 2 is rotatably connected with the hand pushing rod 3 around a third axis C and close to a lower end of the hand pushing rod 3. A transmission rod 4 is provided between the lower end of the hand pushing rod 3 and the rear leg 11 and is hingedly connected with both. A protruding part 5 is provided at a lower end of the transmission rod 4 and protrudes to the front side. A linkage rod 6 is provided between the protruding part 5 and the front leg 12 and is hingedly connected with both. When the hand pushing rod 3 is rotated forward relative to the support rod 2 and is pressed downward, the lower end of the hand pushing rod 3, the upper end of the support rod 2 and the upper end of the transmission rod 4 all approach the lower end of the rear leg 11. The lower end of the support rod 2 and the lower end of the transmission rod 4 are rotated relative to the rear leg 11. When the transmission rod 4 is rotated relative to the rear leg 11, the protruding part 5 on the transmission rod 4 is raised upward, thereby pulling the front leg 12 to rotate and approach the rear leg 11 through the linkage rod 6. Thus, the hand pushing rod 3, the support rod 2, the transmission rod 4 and the front leg 12 are folded to the rear leg 11.

[0031] As shown, Figures 1 to 6 The child stroller frame further comprises a seat frame 7 for supporting a seat. A rear end of the seat frame 7 is rotatably connected with the rear leg 11 around a fourth axis D. A front part of the seat frame 7 is provided with a sliding part 71 which can slide up and down along the front leg 12. During the process of rotating and approaching the rear leg 11, the front leg 12 exerts a force on the sliding part 71 on the seat frame 7, so that the sliding part 71 slides downward along the front leg 12, and the rear end of the seat frame 7 is rotated relative to the rear leg 11, so that the seat frame 7 is also folded and approached relative to the front leg 12 and the rear leg 11. During the folding process of the whole child stroller frame, only the hand pushing rod 3 needs to be rotated forward and pressed downward, so that the folding operation is simple and smooth, and the folding is flexible. After being folded, the child stroller frame has a small volume and is convenient to carry or store.

[0032] As shown, Figure 6 and Figure 7As shown, the front leg 12 comprises a front support rod 121 and a strip-shaped seat 122 fixed on the front support rod 121, the strip-shaped seat 122 is provided with a sliding groove 123 for the sliding part 71 to slide in, the upper end of the strip-shaped seat 122 is provided with a sliding block 124 which can be pushed by the sliding part 71 to slide when the sliding part 71 slides upward, the sliding block 124 and the strip-shaped seat 122 are provided with a first reset spring 125 which can push the sliding block 124 to slide downward when the stroller frame is folded. When the stroller frame is in the unfolded position, the sliding part 71 is located at the upper end of the sliding groove 123, at this time the sliding part 71 pushes the sliding block 124 upward and the first reset spring 125 is in a compressed state, when the stroller frame needs to be folded and the front leg 12 starts to rotate and close to the rear leg 11, the first reset spring 25 elastically resets to push the sliding block 124 downward, the sliding block 124 then pushes the sliding part 71 downward, which can make the sliding part 71 more easily start to slide downward, plays a pushing assisting role, avoids the jamming of the sliding part 71 and the front leg 12, and makes the stroller frame folding more flexible and smooth.

[0033] As shown in Figure 7 , the sliding part 71 is provided with a protruding column protruding on the seat frame 7, and the lower end of the sliding block 124 abuts against the upper side of the protruding column.

[0034] As shown in Figure 6 and Figure 7 , the transmission rod 4 is provided with a torsional spring 41 at the rotatable connection position with the rear leg 11, one end of the torsional spring 41 is connected to the transmission rod 4 and the other end is connected to the rear leg 11, and when the stroller frame is in the unfolded position, the torsional spring 41 is in a deformed state, thus, when the stroller frame needs to be folded after being unlocked, the elastic recovery of the torsional spring 41 can also exert a certain auxiliary force, assisting the stroller frame to fold, so that the entire folding action is smooth and flexible.

[0035] As shown in Figures 1 to 3 , the seat frame 7 is further connected below with a pull-out frame 72 which can slide in and out relative to the seat frame 7. The setting of the pull-out frame 72 can extend the front-to-back length of the seat frame 7, when the pull-out frame 72 is pulled out, it can provide a place for children to put their legs, even allowing babies to lie flat in the stroller to sleep.

[0036] As shown in Figure 3 , Figure 6 and Figure 7As shown, the child stroller frame further comprises a handrail assembly 8, which comprises a U-shaped handrail rod 81 for the child to hold and ensure safety when riding. The rear end of the handrail rod 81 is hingedly connected to the middle of the transmission rod 4, and a connecting piece 82 is arranged on the handrail rod 81 and close to the rear end thereof and is hingedly connected to the strut 2. When the transmission rod 4 is rotated relative to the rear legs 11 and the handlebar 3 to fold, the rear end of the handrail rod 81 is pulled by the transmission rod 4, the handrail rod 81 is rotated relative to the connecting piece 82, the connecting piece 82 is rotated relative to the strut 2, and the handrail assembly 8 can also be folded in linkage, so that the folding operation of the entire child stroller frame is simple and smooth.

[0037] As shown in Figure 8 and Figure 9 , the handlebar 3 is provided with a first connecting shell 31, and the strut 2 is provided with a second connecting shell 22. The locking device comprises a first locking groove 91 arranged in the circumferential direction on the first connecting shell 31, and a second locking groove 92 arranged in the circumferential direction on the second connecting shell 22. A locking gear 93 capable of moving transversely in the space formed by the first connecting shell 31 and the second connecting shell 22 and capable of being engaged with the first locking groove 91 and the second locking groove 92 at the same time is arranged in the space. The locking gear 93 and the first connecting shell 31 are provided with a movable block 94 capable of rotating and pushing the locking gear 93 away from the first locking groove 91 when rotating. The locking gear 93 and the second connecting shell 22 are further provided with a second return spring 95 capable of pushing the locking gear 93 to return transversely. When the child stroller frame needs to be folded, the movable block 94 is rotated, and the movable block 94 pushes the locking gear 93 away from the first locking groove 91 during rotation. At this time, the handlebar 3 can be rotated relative to the strut 2, and folding can be performed.

[0038] As shown in Figure 1 , Figure 8 and Figure 9 , the upper end of the handlebar 3 is provided with an operation switch 96, the eccentric position of the operation switch 96 and the movable block 94 is provided with a pull rope 97 capable of rotating the movable block 94, the movable block 94 is provided with a plurality of inclined grooves 98 in the circumferential direction, and the first connecting shell 31 is provided with an inclined protrusion 99 capable of pushing the movable block 94 to move transversely when the movable block 94 is rotated. The user pinches the operation switch 96, the operation switch 96 rotates the movable block 94 through the pull rope 97, the inclined protrusion 99 on the first connecting shell 31 slides relative to the inclined groove 98 to push the movable block 94 to move transversely, and the movable block 94 pushes the locking gear 93 away from the first locking groove 91, thereby realizing the unlocking operation of the locking device. The entire unlocking operation is very simple and convenient, and the user can operate with one hand.

[0039] As shown in Figure 8 and Figure 9As shown, the movable block 94 is centrally provided with a limiting slot 901, and the first connecting shell 31 is provided with a limiting block 902 which is inserted into the limiting slot 901 and can abut against the slot wall of the limiting slot 901 to limit the rotating angle of the movable block 94. The cooperation of the limiting block 902 and the limiting slot 901 can limit the angle range of the pulling rope 97 for pulling the movable block 94 to rotate, so that the unlocking operation is stable and reliable.

[0040] 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 those skilled in the art 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 child stroller frame comprises a rear leg (11), the upper end of which is rotatably connected with a front leg (12) about a first axis (A), the lower ends of the front leg (12) and the rear leg (11) are each provided with a wheel (13), the upper end of the rear leg (11) is rotatably connected with a supporting rod (2) about a second axis (B), the upper end of the supporting rod (2) is connected with a hand pushing rod (3), and the upper end of the supporting rod (2) is rotatably connected with the hand pushing rod (3) about a third axis (C) and close to the lower end of the hand pushing rod (3), a transmission rod (4) is arranged between the lower end of the hand pushing rod (3) and the rear leg (11) and is hinged to both, the lower end of the transmission rod (4) is provided with a protruding part (5) protruding to the front side, a linkage rod (6) is arranged between the protruding part (5) and the front leg (12) and is hinged to both, the child stroller frame further comprises a seat frame (7), the rear end of the seat frame (7) is rotatably connected with the rear leg (11) about a fourth axis (D), and the front part of the seat frame (7) is provided with a sliding part (71) capable of sliding up and down along the front leg (12).

2. The child's pushchair frame of claim 1, wherein: The front leg (12) comprises a front supporting rod (121) and a strip-shaped seat (122) fixed on the front supporting rod (121), the strip-shaped seat (122) is provided with a sliding groove (123) for the sliding part (71) to slide in, and the upper end of the strip-shaped seat (122) is provided with a sliding block (124) capable of being pushed by the sliding part (71) to slide when the sliding part (71) slides upward, and the sliding block (124) and the strip-shaped seat (122) are provided with a first reset spring (125) capable of pushing the sliding block (124) to slide downward when the child stroller frame is folded.

3. The stroller frame of claim 2, wherein: The sliding part (71) is in protruding connection with a protruding column arranged on the seat frame (7), and the lower end of the sliding block (124) abuts against the upper side of the protruding column.

4. The child's buggy frame of claim 1, wherein: The rotatable connection position of the transmission rod (4) and the rear leg (11) is provided with a torsional spring (41), one end of the torsional spring (41) is connected with the transmission rod (4), the other end is connected with the rear leg (11), and the torsional spring (41) is in a deformed state when the child stroller frame is in an unfolded position.

5. The child stroller frame of claim 1, wherein: The seat frame (7) is further connected with a pull-out frame (72) capable of sliding in and out relative to the seat frame (7).

6. The child stroller frame of claim 1, wherein: The child stroller frame further comprises a handrail assembly (8), the handrail assembly (8) comprises a U-shaped handrail rod (81), the rear end of the handrail rod (81) is hinged to the middle part of the transmission rod (4), and a connecting piece (82) is arranged between the handrail rod (81) and the supporting rod (2) and is hinged to both.

7. A child's pushchair frame according to any one of claims 1 to 6, wherein: The hand push rod (3) is provided with a first connecting shell (31), the support rod (2) is provided with a second connecting shell (22), the locking device comprises a first locking groove (91) provided on the first connecting shell (31) in the circumferential direction, the second connecting shell (22) is provided with a second locking groove (92) in the circumferential direction, the space surrounded by the first connecting shell (31) and the second connecting shell (22) is provided with a locking gear (93) which can move transversely in the space and can be engaged with the first locking groove (91) and the second locking groove (92) at the same time, the locking gear (93) and the first connecting shell (31) are provided with a movable block (94) which can rotate and push the locking gear (93) away from the first locking groove (91) when rotating, the locking gear (93) and the second connecting shell (22) are further provided with a second reset spring (95) which can push the locking gear (93) to reset transversely.

8. The stroller frame of claim 7, wherein: The upper end of the hand push rod (3) is provided with an operation switch (96), the operation switch (96) and the eccentric position of the movable block (94) are provided with a pull rope (97) which can pull the movable block (94) to rotate, the movable block (94) is provided with a plurality of inclined grooves (98) in the circumferential direction, the first connecting shell (31) is provided with an inclined protrusion (99) which cooperates with the inclined groove (98) and can push the movable block (94) to move transversely when the movable block (94) rotates.

9. The stroller frame of claim 7, wherein: The movable block (94) is provided with a limiting groove (901) in the center, the first connecting shell (31) is provided with a limiting block (902) which is inserted into the limiting groove (901) and can abut against the groove wall of the limiting groove (901) to limit the rotation angle of the movable block (94).

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