CN110126903B - Child cart - Google Patents

Abstract

The invention discloses a baby stroller, which comprises a stroller frame, wherein the stroller frame only comprises a front wheel bracket, a rear wheel bracket, a push rod bracket and a support rod bracket, the push rod bracket is connected with the front wheel bracket in a relatively sliding manner along the length extending direction of the front wheel bracket, the upper part of the rear wheel bracket is rotationally connected with the lower part of the push rod bracket, one end part of a support frame is rotationally connected with the upper part of the front wheel bracket, and the other end part of the support frame is rotationally connected with the rear wheel bracket. The cart frame also comprises a seat plate with the front part rotatably connected to the front wheel bracket and a seat plate rear stay rod rotatably connected between the rear part of the seat plate and the rear wheel bracket. The push rod frame is driven to slide downwards relative to the front wheel support, so that all rod pieces of the trolley frame can be folded relatively, the number of the rod pieces is small, the structure is simple, the folding operation is simple, all the rod pieces can be folded tightly together after folding, a very flat and compact structure is achieved, and convenience is brought to daily use and carrying of users.

Description

Strollers

Technical Field

The invention relates to a baby stroller.

Background technique

Strollers provide great convenience for users to carry children when traveling, and have become one of the essential children's products for children as they grow up. Strollers usually include a stroller frame with an unfolded state and a folded state, a wheel assembly provided at the bottom of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state. Currently, there are many types of stroller frames for children, and the number of rods on the stroller frames is different. The connection relationship and connection position between the rods are different, so the folding principles and folding methods are also different. How to make the volume of the stroller frame as small as possible after folding while ensuring stable carrying and pushing of the child has always been the goal pursued by those skilled in the art.

Summary of the invention

The purpose of the present invention is to provide a child stroller with a new structure and folding method.

To achieve the above object, the technical solution adopted by the present invention is: a child stroller, comprising a stroller frame having an unfolded state and a folded state, a front wheel assembly provided at the front bottom of the stroller frame, a rear wheel assembly provided at the rear bottom of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state, wherein the stroller frame comprises:

A front wheel bracket, which gradually extends upward from the front to the rear, and the front wheel assembly is arranged at the bottom of the front wheel bracket;

A rear wheel bracket, which gradually extends upward from the rear to the front, and the rear wheel assembly is arranged at the bottom of the rear wheel bracket;

A push rod frame, wherein the push rod frame is relatively slidably connected to the front wheel frame along the length extension direction of the front wheel frame, and the upper part of the rear wheel frame is rotatably connected to the lower part of the push rod frame;

A support frame, one end of which is rotatably connected to the upper portion of the front wheel support, and the other end of which is rotatably connected to the rear wheel support,

The cart frame also includes a seat plate whose front portion is rotatably connected to the front wheel bracket, and a seat plate rear support rod rotatably connected between the rear portion of the seat plate and the rear wheel bracket. When the cart frame is in a folded state, the push rod frame slides downward along the front wheel bracket to allow the front wheel bracket, rear wheel bracket, push rod frame, support frame, seat plate and seat plate rear support rod to be retracted with each other, wherein the rear end portion of the seat plate is located in front of the front end portion of the seat plate.

Preferably, the seat plate has a sitting surface and a bottom surface located on the back side of the sitting surface, and when the stroller frame is in a folded state and the front wheel assembly and the rear wheel assembly are supported on the ground, the bottom surface of the seat plate is arranged upward.

Preferably, the seat plate has a sitting surface, and the sitting surface is a curved surface which is low in the middle and high at left and right ends.

Preferably, the push rod frame includes a lower push rod frame and an upper push rod frame that can be folded relative to each other, and a push rod locking piece for locking the lower push rod frame and the upper push rod frame relative to each other, the lower part of the lower push rod frame is connected to the front wheel bracket and the rear wheel bracket, the locking mechanism includes a frame locking piece arranged between the lower push rod frame and the front wheel bracket, and the upper push rod frame is driven to unlock the frame locking piece when the upper push rod frame is folded relative to the lower push rod frame.

Furthermore, the lower portion of the upper push rod frame is rotatably connected to the upper portion of the lower push rod frame, and when the upper push rod frame flips relative to the lower push rod frame, the frame locking member is driven to unlock.

Furthermore, the frame locking member includes a locking hole arranged on the front wheel bracket, a locking tongue radially slidably arranged in the lower push rod, and an elastic member for driving the locking tongue to move toward the locking hole, and a traction rope is also arranged between the locking tongue and the upper push rod frame or the push rod locking member.

Preferably, a sliding guide is fixedly provided on the upper portion of the front wheel bracket, and the push rod bracket is connected to the sliding guide in a relatively sliding manner.

Furthermore, the sliding guide is a sliding sleeve, and the lower end of the push rod frame passes through the bottom of the sliding sleeve and is rotatably connected to the upper part of the rear wheel bracket.

Preferably, the push rod frame includes a lower push rod frame and an upper push rod frame which are rotatably connected to each other, and the lower push rod frame is connected to the front wheel bracket and the rear wheel bracket. When the cart frame is in a folded state, the lower push rod frame and the upper push rod frame are respectively folded at both sides of the front wheel bracket.

Furthermore, a hook assembly is provided between the upper push rod frame and the front wheel bracket, which cooperate with each other to relatively fix the two.

Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the stroller of the present invention has a stroller frame that only includes a front wheel bracket, a rear wheel bracket, a push rod bracket, a support rod bracket, a seat plate and a rear support rod of the seat plate. The push rod bracket is driven to slide downward relative to the front wheel bracket to make the various rods of the stroller frame relatively folded. The number of rods is small, the structure is simple, and the folding operation is simple. After folding, the various rods can be tightly folded together to present a very flat and compact structure, which brings convenience to the user's daily use and carrying.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of the child stroller of the present invention in an unfolded state;

FIG2 is a schematic diagram of the exploded structure of the baby stroller of the present invention;

FIG3 is a side view of the child stroller of the present invention in an unfolded state;

Figure 4 is a schematic diagram of the internal structure of part A in Figure 3;

Figure 5 is a schematic diagram of the frame locking member at position B in Figure 4 when it is converted into an unlocked state;

FIG6 is a side view schematic diagram of the folding steps of the child stroller of the present invention;

FIG7 is a three-dimensional schematic diagram corresponding to FIG6.

Among them: 1. front wheel bracket; 11. front support rod; 12. front cross bar; 13. sliding guide (sleeve); 14. front support rod of seat plate; 15. hanging column; 16. locking hole; 10. front wheel assembly; 2. rear wheel bracket; 21. rear support rod; 22. rear cross bar; 23. basket support seat; 20. rear wheel assembly; 3. push rod rack; 31. lower push rod rack; 32. upper push rod rack; 33. push rod locking piece; 34. hanging buckle; 35. push handle; 4. support frame; 5. seat plate; 6. rear support rod of seat plate; 7. frame locking piece; 71. locking tongue; 72. spring; 8. traction rope; 9. basket rod.

Detailed ways

The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

The above and following definitions of up, down, left, and right directions are all based on the directions observed by a person sitting on the stroller when the stroller frame is in the unfolded state.

1 to 7 , a child stroller includes a stroller frame having an unfolded state and a folded state, a front wheel assembly 10 disposed at the front bottom portion of the stroller frame, a rear wheel assembly 20 disposed at the rear bottom portion of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state.

The cart frame comprises a front wheel bracket 1, a rear wheel bracket 2, a push rod bracket 3 and a support bracket 4, wherein the front wheel bracket 1 gradually extends upwardly from front to rear and the front wheel assembly 10 is arranged at the bottom of the front wheel bracket 1; the rear wheel bracket 2 gradually extends upwardly from rear to front and the rear wheel assembly 20 is arranged at the bottom of the rear wheel bracket 2; the push rod bracket 3 can be relatively slidably connected to the front wheel bracket 1 along the length extension direction of the front wheel bracket 1, and the upper part of the rear wheel bracket 2 is rotatably connected to the lower part of the push rod bracket 3; one end of the support bracket 4 is rotatably connected to the upper part of the front wheel bracket 1, and the other end thereof is rotatably connected to the rear wheel bracket 2. When the cart frame is folded, the push rod bracket 3 slides downwardly along the front wheel bracket 1 to drive the front wheel bracket 1, the rear wheel bracket 2, the push rod bracket 3 and the support rod bracket 4 to fold together, and the front wheel assembly 10 and the rear wheel assembly 20 are supported on the ground together.

The pushcart frame further includes a seat plate 5 rotatably connected to the front wheel bracket 1, and a seat plate rear support rod 6 rotatably connected between the seat plate 5 and the rear wheel bracket 2. Specifically, the front portion of the seat plate 5 is rotatably connected to the upper portion of the front wheel bracket 1, and the seat plate rear support rod 6 is rotatably arranged between the rear portion of the seat plate 5 and the rear wheel bracket 2. The seat plate 5 has a sitting surface and a bottom surface located on the back side of the sitting surface. Here, the sitting surface is a curved surface with a low middle and high left and right ends, which is beautiful in shape and comfortable to sit on.

During the folding process of the cart frame, the push rod frame 3 slides downward relative to the front wheel frame 1 and drives the upper part of the rear wheel frame 2 to move toward the lower part of the front wheel frame 1, so that the seat plate 5 flips relative to the front wheel frame 1 so that the rear part of the seat plate 5 moves downward and forward and gradually closes with the rear wheel frame 2; when the cart frame is in the folded state, the front wheel assembly 10 and the rear wheel assembly 20 are supported on the ground, the seat plate 5 and the seat plate rear support rod 6 are closed relative to the front wheel frame 1, the rear wheel frame 2, the push rod frame 3 and the support rod frame 4, the rear end portion of the seat plate 5 is located in front of the front end portion of the seat plate 5, and the bottom surface of the seat plate 5 is arranged upward.

In this embodiment, the push rod frame 3 includes a lower push rod frame 31 and an upper push rod frame 32 that can be relatively folded, and a push rod locking member 33 for relatively locking the lower push rod frame 31 and the upper push rod frame 32. The lower portion of the lower push rod frame 31 is relatively slidably connected to the front wheel bracket 1, and the upper portion of the rear wheel bracket 2 is rotatably connected to the lower portion of the lower push rod frame 31. The locking mechanism includes a frame locking member 7 provided between the lower push rod frame 31 and the front wheel bracket 1 for locking the two. When the frame locking member 7 is locked, the cart frame is locked in the unfolded state, and when the upper push rod frame 31 is folded relative to the lower push rod frame 32, the frame locking member 7 is driven to be unlocked. Here, the lower portion of the upper push rod frame 32 is rotatably connected to the upper portion of the lower push rod frame 31, and the frame locking member 7 is driven to be unlocked when the upper push rod frame 32 is flipped relative to the lower push rod frame 31.

Referring to the accompanying drawings, in this embodiment, the front wheel bracket 1 includes two front support rods 11 respectively arranged on the left and right sides and extending obliquely upward from the front to the rear, a front cross bar 12 fixedly arranged between the lower parts of the front support rods 11 on both sides, and a front wheel assembly 10 is arranged at the lower part of each front support rod 11; the rear wheel bracket 2 includes two rear support rods 21 respectively arranged on the left and right sides and extending obliquely upward from the rear to the front, a rear cross bar 22 fixedly arranged between the lower parts of the rear support rods 21 on both sides, and a rear wheel assembly 20 is arranged at the lower part of each rear support rod 21; the lower push rod frame 31 includes two lower push rods respectively arranged on the left and right sides, and the upper push rod frame 32 includes two upper push rods respectively arranged on the left and right sides, and the upper parts of the two upper push rods are fixedly connected by a push handle 35; the support frame 4 has two groups respectively arranged on the left and right sides.

On the left and right sides of the cart frame, the front support rod 11 is connected to the lower push rod in a sliding manner. Specifically, a sliding guide 13 for providing sliding guidance for the lower push rod is fixedly provided on the upper part of the front support rod 11. Here, the sliding guide 13 is a sliding sleeve. The lower push rod is slidably inserted into the sliding sleeve 13 along the extension direction of its own length; the lower end of the lower push rod passes through the lower part of the sliding sleeve 13 and is rotatably connected to the upper part of the rear support rod 21. The support frame 4 is arranged between the rear support rod 21 and the sliding sleeve 13 on the same side.

A seat front support rod 14 is also arranged between the sliding sleeves 13 on both sides. The front support of the seat plate 5 is connected to the seat front support rod 14 and is rotatably connected relative to the front wheel bracket 1 through the seat front support rod 14; the seat rear support rod 6 is a U-shaped rod with an opening facing downward, and the lower parts of both sides are rotatably connected to the rear support rod 21 on the corresponding side, and the rear part of the seat plate 5 can be rotatably connected around the upper cross bar of the seat rear support rod 6.

2 and 3 , the cart frame further comprises a basket rod 9, which is a U-shaped rod with its opening facing forward, and its front two sides are rotatably connected to the rear support rods 21 on both sides, and basket support seats 23 are provided on the rear support rods 21 on both sides to provide support for the basket rod 9.

As shown in Figures 4 and 5, the frame locking member 7 is arranged between the lower push rod and the sliding sleeve 13. Specifically, the frame locking member 7 includes a locking hole 16 arranged on the sliding sleeve 13, a locking tongue 71 radially slidingly arranged in the lower push rod, and an elastic member 72 for driving the locking tongue 71 to move toward the locking hole 16. A traction rope 8 is also arranged between the locking tongue 72 and the upper push rod or the push rod locking member 33, wherein the elastic member 72 here is a spring. When the frame is in the unfolded state, under the action of the spring 72, the locking tongue 71 is correspondingly inserted into the locking hole 16, and the frame locking member 7 is locked so that the frame is locked in the unfolded state; and when the cart frame is folded, during the process of the upper push rod frame 32 flipping and folding relative to the lower push rod frame 31, the traction rope 8 is tensioned and pulls the locking tongue 71 to move away from the locking hole 16 until it is disengaged from the locking hole 16, so that the frame locking member 7 is unlocked, and at this time, the lower push rod frame 31 can slide downward relative to the front wheel bracket 1 to fold the cart frame.

Referring to Figures 1 and 2, when the cart frame of this embodiment is in the unfolded state, the upper push rod frame 32 and the lower push rod frame 31 of the push rod frame 3 are relatively unfolded and locked by the push rod locking member 33, the front wheel bracket 1 and the push rod frame 3 are relatively unfolded, and the seat plate 5 is supported by the seat plate front support rod 14 and the seat plate rear support rod 6 to provide stable support. The seat plate 5 is located on the upper part of the front wheel bracket 1 and is at a relatively high support height position.

Referring to Figures 6 and 7, when the stroller frame needs to be folded, referring to Figures 6-1 and 7-1, after unlocking the push rod locking member 33, the upper push rod frame 32 is flipped forward to rotate and fold relative to the lower push rod frame 32, which causes the push rod locking members 7 on both sides to be unlocked in conjunction; subsequently, referring to Figures 6-2 and 7-2, the push rod frame 3 is driven to slide downward relative to the front wheel bracket 1, which causes the rear wheel bracket 2 to rotate relative to the push rod frame 3, and the upper part of the rear wheel bracket 2 moves forward and downward, thereby causing the front wheel bracket 1, the rear wheel bracket 2, the push rod bracket 3 and the support bracket 4 are gradually folded; in this process, the seat plate 5 is driven to flip, and the rear part of the seat plate 5 faces downward and moves forward, so that the seat plate 5 gradually flips to the bottom surface facing upward; finally, referring to Figures 6-3 and 7-3, the cart frame is folded, the upper push rod bracket 32 is folded to the front side of the front wheel bracket 1, the lower push rod bracket 31 is folded to the rear side of the front wheel bracket 1, the support bracket 4 and the rear wheel bracket 2 are both folded under the lower push rod bracket 31, and the front wheel assembly 10 and the rear wheel assembly 20 are supported on the ground. The upper part of the rear wheel bracket 2 is folded with the lower part of the front wheel bracket 1 as the lower push rod bracket 31 moves, and the distance between the front wheel assembly 10 and the rear wheel assembly 20 in the front-to-back direction is also reduced. The cart frame presents a flat structure, which is compact in structure, small in overall size, and small in volume.

A hook assembly is also provided between the upper push rod frame 32 and the front wheel bracket 1, which cooperate with each other to make the two relatively fixed. Here, the hook assembly includes a hook 34 provided on the upper push rod and a hanging column 15 provided on the outside of the front support rod 11. In the folded state shown in Figures 6-3 and 7-3, the hook 34 is correspondingly hooked on the hanging column 15, so that the upper push rod frame 31 and the front wheel bracket 1 can be relatively fixed, so that the various rods on the folded cart frame are relatively fixed, so as to facilitate storage and carrying after folding.

In summary, the child stroller of the present invention has a small number of rods, a simple structure, and a simple folding operation. After folding, the rods can be tightly gathered together to present a very flat and compact structure, which brings convenience to the user's daily use and carrying.

The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A child stroller comprising a stroller frame having an expanded state and a collapsed state, a front wheel assembly disposed at a front portion of the stroller frame bottom, a rear wheel assembly disposed at a rear portion of the stroller frame bottom, and a locking mechanism for locking the stroller frame in the expanded state, the stroller frame comprising:

the front wheel bracket gradually extends upwards from front to back, and the front wheel assembly is arranged at the bottom of the front wheel bracket;

The rear wheel bracket gradually extends upwards from back to front, and the rear wheel assembly is arranged at the bottom of the rear wheel bracket;

The push rod frame is connected with the front wheel bracket in a relatively sliding manner along the length extending direction of the front wheel bracket, and the upper part of the rear wheel bracket is rotationally connected with the lower part of the push rod frame;

One end of the supporting frame is rotationally connected with the upper part of the front wheel bracket, the other end of the supporting frame is rotationally connected with the rear wheel bracket,

The cart frame also comprises a seat plate, the front part of which is rotationally connected to the front wheel support, and a seat plate rear stay rod, the seat plate is rotationally connected between the rear part of the seat plate and the rear wheel support, the seat plate is provided with a sitting vertical surface and a bottom surface positioned on the back side of the sitting vertical surface, when the cart frame is in a folded state, the push rod frame slides downwards along the front wheel support so that the front wheel support, the rear wheel support, the push rod frame, the support frame, the seat plate and the seat plate rear stay rod are mutually folded, wherein the rear end part of the seat plate is positioned in front of the front end part of the seat plate, and when the front wheel assembly and the rear wheel assembly are supported on the ground, the bottom surface of the seat plate is upwards arranged.

2. The stroller of claim 1, wherein: the seat board is provided with a sitting face which is a curved surface with a lower middle and a higher left end and a higher right end.

3. The stroller of claim 1, wherein: the push rod frame comprises a lower push rod frame and an upper push rod frame which can be folded relatively, and a push rod locking piece used for locking the lower push rod frame and the upper push rod frame relatively, wherein the lower part of the lower push rod frame is connected with the front wheel support and the rear wheel support, the locking mechanism comprises a frame locking piece arranged between the lower push rod frame and the front wheel support, and the upper push rod frame is arranged relatively to the lower push rod frame to drive the frame locking piece to be unlocked when being folded.

4. A stroller according to claim 3, wherein: the lower part of the upper push rod frame is rotatably connected with the upper part of the lower push rod frame, and the upper push rod frame is driven to unlock the frame locking piece when the upper push rod frame overturns relative to the lower push rod frame.

5. The stroller of claim 4, wherein: the frame locking piece comprises a lock hole arranged on the front wheel support, a lock tongue arranged in the lower push rod in a sliding way along the radial direction, and an elastic piece for driving the lock tongue to move towards the lock hole, wherein a traction rope is further arranged between the lock tongue and the upper push rod support or between the lock tongue and the push rod locking piece.

6. The stroller of claim 1, wherein: the upper part of the front wheel bracket is fixedly provided with a sliding guide piece, and the push rod frame is connected with the sliding guide piece in a relative sliding fit manner.

7. The stroller of claim 6, wherein: the sliding guide piece is a sliding sleeve, and the lower end part of the push rod frame penetrates out to the lower part of the sliding sleeve and is rotationally connected with the upper part of the rear wheel bracket.

8. The stroller of claim 1, wherein: the push rod frame comprises a lower push rod frame and an upper push rod frame which are connected in a rotating manner, wherein the lower push rod frame is connected with the front wheel support and the rear wheel support, and when the trolley frame is in a folding state, the lower push rod frame and the upper push rod frame are respectively folded at two sides of the front wheel support.

9. The stroller of claim 8, wherein: and a hanging buckle assembly which is mutually matched and enables the upper push rod frame and the front wheel bracket to be relatively fixed is also arranged between the upper push rod frame and the front wheel bracket.