CN219056334U - Child cart - Google Patents

Abstract

The utility model discloses a child stroller, which comprises a stroller frame with an unfolding state and a folding state, a front wheel assembly arranged at the front part of the bottom of the stroller frame and a rear wheel assembly arranged at the rear part of the bottom of the stroller frame, wherein the stroller frame comprises a front bracket, a rear upper bracket, a rear lower bracket, a push rod, an upper connecting rod and a supporting rod, the front wheel assembly is arranged at the lower part of the front bracket, the rear wheel assembly is arranged at the lower part of the rear lower bracket, the upper part of the rear upper bracket is pivotally connected with the upper part of the front bracket, the upper part of the rear lower bracket is pivotally connected with the lower part of the rear upper bracket, the lower part of the push rod is pivotally connected with the upper part of the front bracket, one end part of the upper connecting rod is pivotally connected with the lower part of the push rod, the other end of the upper connecting rod is pivotally connected with the rear upper bracket, and the rear lower part of the supporting rod is pivotally connected with the rear lower bracket. The folding operation of this children's shallow is simple, and structure is small after folding, portable and deposit.

Description

Child cart

Technical Field

The utility model relates to the technical field of children products, in particular to a child trolley.

Background

The child cart is generally used when a child is carried by a adult and can be folded for convenient carrying and storage. The stroller comprises a stroller frame with an unfolding state and a folding state, and when the rods forming the stroller frame are different, the connection modes are also different, so that the folding principle and the folding effect of the stroller are also different. In the prior art, part of the children's barrows have the problems of complex structure, inconvenient folding and larger volume after folding.

Disclosure of Invention

The utility model aims at overcoming the defects in the prior art, and provides the child trolley which is simple in folding operation, small in structure size after folding and convenient to carry and store.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a stroller comprising a stroller frame having an expanded state and a collapsed state, a front wheel assembly disposed at a bottom front portion of the stroller frame, and a rear wheel assembly disposed at a bottom rear portion of the stroller frame, the stroller frame comprising:

the front wheel assembly is arranged at the lower part of the front bracket;

the upper part of the rear upper bracket is pivotally connected with the upper part of the front bracket;

the rear wheel assembly is arranged at the lower part of the rear lower bracket, and the upper part of the rear lower bracket is pivotally connected with the lower part of the rear upper bracket;

the lower part of the push rod is pivotally connected with the upper part of the front bracket;

an upper connecting rod, wherein one end part of the upper connecting rod is pivotally connected with the lower part of the push rod, and the other end of the upper connecting rod is pivotally connected with the rear upper bracket;

and the front part of the stay bar is pivotally connected with the lower part of the front bracket, and the rear part of the stay bar is pivotally connected with the rear lower bracket.

Preferably, when the stroller is in the unfolded state, on the front support, the connection between the push rod and the front support, the connection between the rear upper support and the front support, and the connection between the stay rod and the front support are sequentially arranged from top to bottom, on the push rod, the connection between the upper connecting rod and the push rod is located below the connection between the push rod and the front support, on the rear upper support, the connection between the front support and the rear upper support, the connection between the upper connecting rod and the rear upper support, and the connection between the rear upper support and the rear lower support are sequentially arranged from top to bottom, and on the rear lower support, the connection between the rear upper support and the rear lower support is located above the connection between the stay rod and the rear lower support.

Preferably, when the stroller is in the deployed state, the rear upper support and the rear lower support extend in the same direction and each extend obliquely downward from front to rear.

Preferably, when the child stroller is in the deployed state, the front support and the push rod extend in the same direction and each extend obliquely upward from front to back.

Preferably, the rear wheel assembly comprises a rear wheel seat and a rear wheel pivotally connected to the rear wheel seat, the rear wheel seat and the rear lower bracket being pivotally connected by a first axle which extends obliquely downward from front to rear when the stroller is in the deployed state.

Further, the stroller further includes a drive mechanism for driving the rear wheel assembly to rotate about the first axis relative to the rear subframe when the stroller frame is folded and unfolded, the drive mechanism being disposed between the strut and the rear wheel mount.

Further, the driving mechanism comprises a lower connecting rod, one end part of the lower connecting rod is connected with the rear part of the stay rod in a multi-directional rotation mode, and the other end part of the lower connecting rod is connected with the rear wheel seat in a multi-directional rotation mode.

In a specific embodiment, the driving mechanism further includes a connecting seat, the connecting seat is pivotally connected with the rear portion of the supporting rod through a second shaft, one end of the lower connecting rod is pivotally connected with the connecting seat through a third shaft, the second shaft and the third shaft are vertically arranged or obliquely arranged, and the other end of the lower connecting rod is connected with the rear wheel seat through a spherical joint in a universal rotation manner.

In still another specific embodiment, one end of the lower link is connected to the rear portion of the stay bar through a ball joint in a universal rotation manner, and the other end of the lower link is connected to the rear wheel seat through a ball joint in a universal rotation manner.

Preferably, the front wheel assembly includes a front fork and a front wheel pivotally connected to the front fork, the front fork being pivotally connected to a lower portion of the front bracket by a fourth shaft, the fourth shaft extending obliquely downward from right to left or the fourth shaft extending obliquely downward from left to right when the stroller is in the deployed state.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages: when the baby stroller is folded, as long as the push rod is turned forwards and downwards to be close to the front support, the upper rear support can be pulled to rotate upwards relative to the front support through the upper connecting rod to be close to the front support, so that the lower rear support can rotate forwards relative to the upper rear support to be close to the upper rear support, the support rod is driven to rotate upwards to be close to the front support until all rods forming the stroller frame are closely close to each other, and the folding operation of the baby stroller is realized. The folding operation of this children's shallow is simple, and compact structure, small after folding of children's shallow, portable and deposit.

Drawings

Fig. 1 is a schematic perspective view of a stroller in an unfolded state according to the present embodiment;

FIG. 2 is a schematic side view of the stroller in an unfolded state;

FIG. 3 is a schematic rear view of the stroller in the unfolded state (with the connection seat below the stay);

FIG. 4 is an enlarged schematic view of a portion of FIG. 3 at A;

FIG. 5 is a schematic rear view of the child stroller in the unfolded state (left/right side of the connecting seat on the stay);

FIG. 6 is an enlarged schematic view of a portion of FIG. 5 at A;

FIG. 7 is a schematic perspective view of the stroller of the present embodiment during folding (with the push rod rotated forward to approximately vertical);

FIG. 8 is a schematic side view of the stroller of the present embodiment during folding (with the push rod rotated forward to approximately vertical);

FIG. 9 is a schematic rear view of the stroller of the present embodiment during folding (with the push rod rotated forward to approximately vertical);

FIG. 10 is a schematic perspective view of the stroller in the folding process (with the push rod continuing to rotate forward);

FIG. 11 is a schematic side view of the stroller in the folding process (with the push rod continuing to rotate forward);

FIG. 12 is a schematic rear view of the stroller in the folding process (with the push rod continuing to rotate forward);

fig. 13 is a schematic perspective view of the stroller in the folding process (the stroller frame is folded);

FIG. 14 is a schematic side view of the stroller of the present embodiment during folding (the stroller frame is folded);

FIG. 15 is a schematic rear view of the stroller in the folding process (the stroller frame is folded);

fig. 16 is a schematic perspective view of the stroller in a folded state according to the present embodiment;

FIG. 17 is a schematic side view of the stroller in a collapsed condition;

fig. 18 is a schematic rear view of the stroller in a folded state according to the present embodiment.

Wherein: 11. a front bracket; 12. a rear upper bracket; 13. a rear lower bracket; 14. a push rod; 15. an upper connecting rod; 16. a brace rod; 17. a pushing handle; 21. a first shaft; 22. a second shaft; 23. a third shaft; 24. a fourth shaft; 3. a front wheel assembly; 31. a front fork; 32. a front wheel; 33. a front axle; 4. a rear wheel assembly; 41. a rear wheel seat; 42. a rear wheel; 43. a rear axle; 51. a lower connecting rod; 52. and a connecting seat.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

In the following description, the directions of "front", "rear", "left", "right", "up", "down", and the like are referred to as "front" in the left direction in fig. 2, the right direction in fig. 2 is "rear", the upper direction in fig. 2 is "up", the lower direction in fig. 2 is "down", the left direction in fig. 3 is "left", and the right direction in fig. 3 is "right". The above directional definitions are merely provided to facilitate the description of the utility model and to simplify the description and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation and are not to be construed as limiting the utility model.

As shown in fig. 1 to 18, the child stroller of the present utility model includes a stroller frame having an unfolded state and a folded state, a front wheel assembly 3 provided at a bottom front portion of the stroller frame, and a rear wheel assembly 4 provided at a bottom rear portion of the stroller frame.

The trolley frame comprises a front bracket 11, a rear upper bracket 12, a rear lower bracket 13, a push rod 14, an upper connecting rod 15 and a stay bar 16. The front wheel assembly 3 is disposed at a lower portion of the front bracket 11, and the rear wheel assembly 4 is disposed at a lower portion of the rear lower bracket 13.

The upper portion of the front bracket 11 is pivotally connected to the lower portion of the push rod 14. The upper part of the rear upper bracket 12 is pivotally connected to the front bracket 11, and the lower part of the rear upper bracket 12 is pivotally connected to the upper part of the rear lower bracket 13. The upper portion of the upper link 15 is pivotally connected to the lower portion of the push rod 14, and the lower portion of the upper link 15 is pivotally connected to the rear upper bracket 12. The front portion of the stay 16 is pivotally connected to the lower portion of the front bracket 11, and the rear portion of the stay 16 is pivotally connected to the lower portion of the rear lower bracket 13.

Thus, a four-bar linkage is formed between the front bracket 11, the rear upper bracket 12, the upper link 15 and the push rod 14, and a four-bar linkage is also formed between the front bracket 11, the rear upper bracket 12, the rear lower bracket 13 and the stay 16. When the trolley frame is folded from the unfolded state or unfolded from the folded state, one rod piece in the two four-bar mechanisms is enabled to act, and other rod pieces can be driven to synchronously act through the two four-bar mechanisms, so that folding and unfolding operations of the trolley frame can be realized, and the folding and unfolding operations of the trolley frame are quite convenient.

When the stroller is in the unfolded state, the front bracket 11 and the push rod 14 extend in the same direction and each extend obliquely upward from front to rear. The rear upper bracket 12 and the rear lower bracket 13 extend in the same direction and each extend obliquely downward from front to rear. This gives the child stroller a neat and attractive appearance. And on the front bracket 11, the connection between the push rod 14 and the front bracket 11, the connection between the rear upper bracket 12 and the front bracket 11, and the connection between the stay rod 16 and the front bracket 11 are sequentially arranged from top to bottom. On the push rod 14, the connection of the upper link 15 and the push rod 14 is located below the connection of the push rod 14 and the front bracket 11. On the rear upper bracket 12, the connection between the front bracket 11 and the rear upper bracket 12, the connection between the upper connecting rod 15 and the rear upper bracket 12, and the connection between the rear upper bracket 12 and the rear lower bracket 13 are arranged in sequence from top to bottom. On the rear lower bracket 13, the junction of the rear upper bracket 12 and the rear lower bracket 13 is located above the junction of the stay 16 and the rear lower bracket 13.

The trolley frame may further comprise a push handle 17, the lower part of the push handle 17 being in rotational connection with the upper part of the push rod 14. Thus, when the stroller is folded, the push handle 17 can also rotate to be close to the push rod 14, so that the structural volume of the folded stroller is smaller.

The rear wheel assembly 4 includes a rear wheel seat 41 and a rear wheel 42. The rear wheel 42 is pivotally connected to the rear wheel seat 41 via a rear wheel axle 43, the rear wheel seat 41 being pivotally connected to the lower portion of the rear lower bracket 13 via a first axle 21, the first axle 21 being arranged obliquely with respect to the rear lower bracket 13. The first shaft 21 extends obliquely downwards from front to rear when the stroller is in the unfolded state. The rear wheel assembly 4 is rotatably supported on the side of the cart frame about the first axis 21, with the rear wheel axle 43 extending in the left-right direction, as shown in fig. 1-3 and 5. The rear wheel assembly 4 is also pivoted about the first axis 21 to be folded under the frame of the cart, and the rear wheel axle 43 extends in the up-down direction as shown in fig. 13 to 18.

The stroller further comprises a drive mechanism by which the rear wheel assembly 4 is urged to rotate about the first axis 21 relative to the rear subframe 13 to collapse under the stroller frame during folding of the stroller frame. During the unfolding process of the cart frame, the rear wheel assembly 4 can be driven by the driving mechanism to reversely rotate around the first shaft 21 relative to the rear lower bracket 13 so as to be supported on the side part of the cart frame. The drive mechanism is disposed between the stay 16 and the rear wheel mount 41.

Specifically, the driving mechanism includes a lower link 51, one end of the lower link 51 is connected to the rear portion of the stay 16 in a multi-directional rotation manner, and the other end of the lower link 51 is connected to the rear wheel seat 41 in a multi-directional rotation manner.

In a specific embodiment, the driving mechanism further includes a connecting seat 52, the connecting seat 52 is pivotally connected to the rear portion of the stay 16 through a second shaft 22, one end portion of the lower link 51 is pivotally connected to the connecting seat 52 through a third shaft 23, the second shaft 22 and the third shaft 23 are vertically or obliquely arranged, and the other end portion of the lower link 51 is connected to the rear wheel seat 41 through a spherical joint for universal rotation. In this way, when the cart frame is folded or unfolded and the stay bar 16 acts, the connecting seat 52 can be driven to rotate around the second shaft 22 relative to the stay bar 16, the lower connecting rod 51 can rotate around the third shaft 23 relative to the connecting seat 52, and the lower connecting rod 51 can also rotate freely relative to the rear wheel seat 41, so that the lower connecting rod 51 can pull the rear wheel seat 41 to drive the rear wheel 42 to rotate relative to the rear lower bracket 13.

The connection seat 52 may be provided above or below the stay 16, with the second shaft 22 extending in an up-down direction, and the third shaft 23 extending obliquely rearward from the outside to the inside of the stroller when the stroller is in the unfolded state, as shown in fig. 3 and 4.

The connection seat 52 may be provided on the left or right side of the stay 16, in which case the second shaft 22 extends in the left-right direction and the third shaft 23 extends in the front-rear direction when the stroller is in the unfolded state, as shown in fig. 5 and 6.

In this embodiment, the rear wheel assemblies 4 are symmetrically disposed on the left and right sides of the cart frame, and the corresponding driving mechanisms are disposed on the left and right sides, respectively, that is, the lower links 51 are disposed on the left and right sides. The lengths of the lower links 51 on the left and right sides are different, and when the connection positions and angles of the lower links 51 and the rear wheel seat 41 are unchanged, the connection positions of the lower links 51 on the two sides and the stay 16 are different in distance from the central plane A of the stroller. That is, when the second shafts 22 extend in the up-down direction, the distances from the center plane a of the second shafts 22 on the left and right sides are different. When the second shaft 22 extends in the left-right direction, the third shafts 23 on the left and right sides are different in distance from the center plane a. Like this, when the shallow frame is folding to drive back wheel subassembly 4 through actuating mechanism around first axle 21 rotation, can make the position of back wheel subassembly 4 of left and right sides stagger each other to make back wheel subassembly 4 of left and right sides form the structure of range upon range of from top to bottom, make back wheel subassembly 4 of left and right sides can draw close with the shallow frame better, make children's shallow folding back structure volume littleer.

Of course, one end of the lower link 51 may be connected to the rear portion of the stay 16 by a ball joint, and the other end of the lower link 51 may be connected to the rear wheel seat 41 by a ball joint. In this way, the lower link 51 can be made to rotate freely relative to the stay 16 and the rear wheel seat 41 when the stay 16 is actuated, and the rear wheel assembly 4 can be driven to rotate synchronously relative to the rear lower bracket 13 when the stroller frame is folded or unfolded.

The front wheel assembly 3 includes a front fork 31 and a front wheel 32. The front wheel 32 is pivotally connected to the front fork 31 by a front axle 33, and the front fork 31 is pivotally connected to the lower portion of the front bracket 11 by the fourth axle 24. When the stroller is in the unfolded state, the front axle 33 extends in the left-right direction, the fourth axle 24 extends obliquely downward from right to left, or the fourth axle 24 extends obliquely downward from left to right. Specifically, when the distance from the center plane a of the second shaft 22 or the third shaft 23 on the left side is greater than the distance from the center plane a of the second shaft 22 or the third shaft 23 on the right side, the fourth shaft 24 extends obliquely downward from the left side to the right side. When the distance of the second shaft 22 or the third shaft 23 on the left side from the center plane a is smaller than the distance of the second shaft 22 or the third shaft 23 on the right side from the center plane a, the fourth shaft 24 extends obliquely downward from the right to the left. Thus, after the stroller frame is folded, the front wheel assembly 3 can rotate backwards around the fourth shaft 24 to extend the front wheel shaft 33 in the up-down direction and close to the rear wheel assembly 4, so that the structure of the folded stroller is more compact and the size of the folded stroller is smaller.

When the stroller is folded from the unfolded state, the push handle 17 is rotated downwards to be close to the push rod 14. The push rod 14 and the push handle 17 are integrally rotated forwards and downwards to be close to the front bracket 11, the upper rear bracket 12 is pulled to be close to the front bracket 11 by the upper connecting rod 15 to be rotated upwards relative to the front bracket 11, the lower rear bracket 13 is rotated forwards relative to the upper rear bracket 12 to drive the supporting rod 16 to be rotated upwards to be close to the front bracket 11, when the supporting rod 16 is rotated upwards, the lower connecting rods 51 on the two sides respectively pull the rear wheel assemblies 4 on the corresponding side to be rotated around the first shaft 21 relative to the lower rear bracket 13, the folding process is as shown in fig. 7-12 until the push rod 14, the upper rear bracket 12, the lower rear bracket 13 and the supporting rod 16 are all close to the front bracket 11, the trolley frame is folded, and as shown in fig. 13-15, at the moment, the rear wheel assemblies 4 on the left side and the right side are all folded below the trolley frame, the rear wheel assemblies 4 on the left side and the right side are closely folded up in an up-down lamination mode, and the rear wheel shafts 43 of the rear wheel assemblies 4 on the left side and the right side are all extended in the up-down direction. The front wheel assembly 3 is rotated back about the fourth axis 24 to come close to the rear wheel assembly 4 until the front wheel axle 33 of the front wheel assembly 3 extends in the up-down direction, and finally folded as shown in fig. 16 to 18. The folded baby stroller has compact structure, small volume and convenient carrying and storage.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (10)

1. The utility model provides a children's shallow, includes that have the shallow frame of expansion state and folding state, set up the front wheel subassembly of the bottom front portion of shallow frame and set up the rear wheel subassembly of the bottom rear portion of shallow frame, its characterized in that: the cart frame includes:

the front wheel assembly is arranged at the lower part of the front bracket;

the upper part of the rear upper bracket is pivotally connected with the upper part of the front bracket;

the rear wheel assembly is arranged at the lower part of the rear lower bracket, and the upper part of the rear lower bracket is pivotally connected with the lower part of the rear upper bracket;

the lower part of the push rod is pivotally connected with the upper part of the front bracket;

an upper connecting rod, wherein one end part of the upper connecting rod is pivotally connected with the lower part of the push rod, and the other end of the upper connecting rod is pivotally connected with the rear upper bracket;

and the front part of the stay bar is pivotally connected with the lower part of the front bracket, and the rear part of the stay bar is pivotally connected with the rear lower bracket.

2. The stroller of claim 1, wherein: when the child stroller is in a unfolded state, the connection parts of the push rod and the front support, the connection parts of the rear upper support and the front support, the connection parts of the support rod and the front support are sequentially arranged from top to bottom, the connection parts of the upper connecting rod and the push rod are positioned below the connection parts of the push rod and the front support, the connection parts of the front support and the rear upper support, the connection parts of the upper connecting rod and the rear upper support, the connection parts of the rear upper support and the rear lower support are sequentially arranged from top to bottom, and the connection parts of the rear upper support and the rear lower support are positioned above the connection parts of the support rod and the rear lower support.

3. The stroller of claim 1, wherein: when the child stroller is in the unfolded state, the rear upper bracket and the rear lower bracket extend in the same direction and both extend obliquely downwards from front to back.

4. The stroller of claim 1, wherein: when the child stroller is in the unfolded state, the front support and the push rod extend in the same direction and all extend obliquely upwards from front to back.

5. The stroller of claim 1, wherein: the rear wheel assembly comprises a rear wheel seat and a rear wheel pivotally connected to the rear wheel seat, the rear wheel seat is pivotally connected to the rear lower bracket through a first shaft, and the first shaft extends obliquely downwards from front to back when the stroller is in a unfolded state.

6. The stroller of claim 5, wherein: the stroller further includes a drive mechanism for driving the rear wheel assembly to rotate about the first axis relative to the rear subframe when the stroller frame is folded and unfolded, the drive mechanism being disposed between the strut and the rear wheel mount.

7. The stroller of claim 6, wherein: the driving mechanism comprises a lower connecting rod, one end part of the lower connecting rod is connected with the rear part of the stay bar in a multidirectional rotation mode, and the other end part of the lower connecting rod is connected with the rear wheel seat in a multidirectional rotation mode.

8. The stroller of claim 7, wherein: the driving mechanism further comprises a connecting seat, the connecting seat is in pivot connection with the rear part of the supporting rod through a second shaft, one end part of the lower connecting rod is in pivot connection with the connecting seat through a third shaft, the second shaft and the third shaft are vertically arranged or obliquely arranged, and the other end part of the lower connecting rod is in universal rotation connection with the rear wheel seat through a spherical joint.

9. The stroller of claim 7, wherein: one end part of the lower connecting rod is connected with the rear part of the stay bar through a spherical joint in a universal rotation mode, and the other end part of the lower connecting rod is connected with the rear wheel seat through the spherical joint in a universal rotation mode.

10. The stroller of claim 1, wherein: the front wheel assembly comprises a front wheel fork and a front wheel which is pivotally connected to the front wheel fork, the front wheel fork is pivotally connected with the lower part of the front bracket through a fourth shaft, and when the stroller is in a unfolded state, the fourth shaft extends obliquely downwards from right to left, or the fourth shaft extends obliquely downwards from left to right.

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