CN109733455B - Strollers - Google Patents

Abstract

The present invention discloses a child stroller, wherein the frame comprises a front bracket, a rear bracket, a push rod assembly and a pull rod, the front wheel is connected to the bottom of the front bracket, the rear wheel is connected to the bottom of the rear bracket, the front bracket and the rear bracket can be connected relatively slidingly along the front-back direction, the lower part of the push rod assembly is rotatably connected to one end part of the rear bracket, the pull rod is rotatably connected between the push rod assembly and the front bracket, and the rotational connection position between the pull rod and the front bracket is located behind the rotational connection position between the push rod assembly and the rear bracket. When the frame is in a folded state, the front bracket and the rear bracket slide relatively and are retracted along the front-back direction, the distance between the front wheel and the rear wheel along the front-back direction is reduced, and the dimension of the frame in the front-back direction is shortened.

Description

Strollers

Technical Field

The invention relates to a baby stroller.

Background technique

Most of the strollers on the market currently have a relatively large folding size, which is not conducive to storage and transportation. Even if there are a few strollers with a small folding size, the folding operation is relatively cumbersome and usually requires multiple steps to achieve complete folding. Therefore, we need a stroller with a small folding size and easy folding.

Summary of the invention

The purpose of the present invention is to provide a novel baby stroller.

To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a child stroller, comprising a frame with an unfolded state and a folded state, a front wheel arranged at a front bottom portion of the frame, a rear wheel arranged at a rear bottom portion of the frame, and a locking mechanism for locking the frame in the unfolded state, the frame comprising a front bracket, a rear bracket, a push rod assembly and a pull rod, the front wheel being connected to the bottom portion of the front bracket, the rear wheel being connected to the bottom portion of the rear bracket, the front bracket and the rear bracket being able to be relatively slidably connected in a front-to-rear direction, the lower portion of the push rod assembly being rotatably connected to one end portion of the rear bracket, the pull rod being rotatably connected between the push rod assembly and the front bracket, and the rotational connection position between the pull rod and the front bracket is located behind the rotational connection position between the push rod assembly and the rear bracket, and when the frame is in the folded state, the front bracket and the rear bracket slide relatively and are retracted in the front-to-rear direction, and the distance between the front wheel and the rear wheel in the front-to-rear direction is reduced.

Preferably, the front bracket and the rear bracket both extend in the front-rear direction, and the front bracket is connected to the rear bracket in a relatively sliding manner along the length extension direction of the rear bracket.

Furthermore, the rear bracket includes a rear bracket rod body and a sliding guide fixedly arranged at the front part of the rear bracket rod body, and the front bracket and the sliding guide are relatively slidably matched and connected.

Furthermore, the lower portion of the push rod assembly is rotatably connected to the sliding guide, and the lower portion of the pull rod is rotatably connected to the rear portion of the front bracket via a rotating shaft, and the rotating shaft is located behind the sliding guide.

Furthermore, the sliding guide member has a guide hole penetrating along the front-to-back direction, and the front bracket is relatively slidably arranged in the guide hole along the front-to-back direction.

Preferably, the push rod assembly includes a lower push rod and an upper push rod, the lower portion of the lower push rod is rotatably connected to the rear bracket, and the upper portion of the lower push rod is rotatably connected to the upper push rod; the frame also includes a connecting rod, one end of the connecting rod is rotatably connected to the pull rod, and the other end of the connecting rod is rotatably connected to the lower end of the upper push rod.

Furthermore, the frame also includes a seat rod extending in the front-rear direction, the rear portion of the seat rod is rotatably connected to the connecting rod, and the front portion of the seat rod is connected to the lower push rod in a manner that it can both rotate relatively and slide relatively along its own length.

Furthermore, a sliding member is rotatably connected to the lower push rod, and the sliding member is relatively slidably arranged on the seat rod along the length extension direction of the seat rod.

Furthermore, when the frame is in a folded state, the front bracket and the rear bracket are folded in the front-to-back direction, and the upper push rod, the lower push rod and the connecting rod are stacked and folded above the front bracket and the rear bracket in the up-down direction.

Preferably, the front bracket includes two front support rods respectively arranged on the left and right sides, the rear bracket includes two rear support rods respectively arranged on the left and right sides, the front support rods and the rear support rods are connected to each other in a relatively sliding manner along the front and rear directions on the left and right sides of the frame, the front wheels are connected to the front parts of the front support rods, and the rear wheels are connected to the rear parts of the rear support rods, and a group of the push rod assembly and the pull rod are respectively provided on the left and right sides of the frame.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the child stroller of the present invention has a small number of frame rods and a simple structure. The folding and opening operations can be achieved by simply flipping the push rod assembly, which is very convenient to operate. When folding, the front bracket and the rear bracket slide and fold in the front-to-back direction to shorten the front-to-back dimension of the frame. The overall structure of the folded frame is flat, which brings convenience to the user's daily storage and carrying.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of the child stroller of Embodiment 1 in an unfolded state;

FIG2 is a side view of the child stroller of Embodiment 1 in the unfolded state;

FIG3 is a perspective view of the child stroller of Embodiment 1 in a semi-folded state;

FIG4 is a side view of the child stroller of Embodiment 1 in a semi-folded state;

FIG5 is a perspective view of the child stroller of Example 1 in a folded state;

FIG6 is a side view of the child stroller of Example 1 in a folded state;

FIG. 7 is a perspective view of the child stroller of Embodiment 2 in an unfolded state;

FIG8 is a side view of the child stroller of Embodiment 2 in the unfolded state;

FIG9 is a perspective view of the child stroller of Embodiment 2 in a semi-folded state;

FIG10 is a side view of the child stroller of Embodiment 2 in a semi-folded state;

FIG11 is a perspective view of the child stroller of Example 2 in a folded state;

FIG12 is a side view of the child stroller of Example 2 in a folded state;

Among them: 1. front bracket; 1a. front support rod; 1b. front cross bar; 2. rear bracket; 21. rear bracket rod body; 22. sliding guide; 23. rear cross bar; 3. push rod assembly; 31. lower push rod; 32. upper push rod; 4. pull rod; 5. connecting rod; 6. seat rod; 7. sliding member; 11. rotating shaft; 12. second shaft; 13. third shaft; 14. fourth shaft; 15. fifth shaft; 16. sixth shaft; 17. seventh shaft; 10. front wheel; 20. rear wheel.

Detailed ways

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

Example 1

1 to 6 , the stroller includes a frame having an unfolded state and a folded state, a front wheel 10 disposed at the front bottom of the frame, a rear wheel 20 disposed at the rear bottom of the frame, and a locking mechanism for locking the frame in the unfolded state.

The frame includes a front bracket 1, a rear bracket 2, a push rod assembly 3 and a pull rod 4, the front wheel 10 is connected to the bottom of the front bracket 1, the rear wheel 20 is connected to the bottom of the rear bracket 2, the front bracket 1 and the rear bracket 2 are connected so as to be relatively slidable along the front and rear directions, the lower part of the push rod assembly 3 is rotatably connected to one end of the rear bracket 2, the pull rod 4 is rotatably connected between the push rod assembly 3 and the front bracket 1, and the rotational connection position between the pull rod 4 and the front bracket 1 is located behind the rotational connection position between the push rod assembly 3 and the rear bracket 2.

When the frame is in the unfolded state, the front bracket 1 and the rear bracket 2 are relatively unfolded in the front-to-back direction, and the push rod assembly 3 and the pull rod 4 are both unfolded relative to the front bracket 1 and the rear bracket 2; when the frame is folded, the push rod assembly 3 is flipped and retracted downward toward the rear bracket 2, so that the pull rod 4 drives the front bracket 1 to gradually slide and retract backward with the rear bracket 2 until the front bracket 1 and the rear bracket 2 are completely retracted in the front-to-back direction, the push rod assembly 3 and the pull rod 4 are both retracted downward with the front bracket 1 and the rear bracket 2, and the frame is completely folded. At this time, the distance between the front wheel 10 and the rear wheel 20 in the front-to-back direction is reduced.

As shown in the drawings, the front bracket 1 and the rear bracket 2 both extend in the front-to-back direction, and the front bracket 1 is connected to the rear bracket 2 in a relatively sliding manner along the length extension direction of the rear bracket 2. In this embodiment, the front bracket 1 includes two front support rods 1a arranged on the left and right sides and extending in the front-to-back direction, and a front cross bar 1b fixed between the front parts of the two front support rods 1a, and a group of front wheels 10 are connected to the front part of each front support rod 1a. The rear bracket 2 includes two rear support rods arranged on the left and right sides and a rear cross bar 23 fixed between the rear parts of the rear support rods on both sides. On the left and right sides of the frame, the front support rods 1a and the rear support rods are connected in a relatively sliding manner along the front-to-back direction.

Here, the rear support rod on each side includes a rear support rod body 21 and a sliding guide member 22 fixedly arranged at the front of the rear support rod body 21. The sliding guide member 22 has a guide hole penetrating along the front-to-back direction. The front support rod 1a is relatively slidably inserted into the above-mentioned guide hole along the front-to-back direction to achieve a sliding fit connection with the sliding guide member 22.

A set of push rod assembly 3 and pull rod 4 are provided on each side of the frame. The lower part of the push rod assembly 3 is rotatably connected to the sliding guide 22. Specifically, as shown in FIG. 2 , the push rod assembly 3 includes a lower push rod 31 and an upper push rod 32. The lower part of the lower push rod 31 is pivotally connected to the sliding guide 22 via the second shaft 12, and the upper part of the lower push rod 31 is rotatably connected to the upper push rod 32 via the fifth shaft 15. The upper push rods 32 on both sides are integrally arranged to form a U-shaped rod with the opening facing downward. The upper part of the pull rod 4 is pivotally connected to the lower push rod 31 via the third shaft 13, and the lower part thereof is rotatably connected to the rear part of the front support rod 1a via the rotating shaft 11, and the rotating shaft 11 is located behind the sliding guide 22. A triangular structure with a variable bottom side length is formed between the lower push rod 31, the front support rod 1a, and the pull rod 4. The front support rod 1a slides relative to the sliding guide 22, so that the front support 1 and the rear support 2 can be unfolded and folded in the front-to-back direction, and the push rod assembly 3 and the pull rod 4 can be opened and folded relative to the front support 1 and the rear support 2.

As shown in the accompanying drawings, a connecting rod 5 is further provided on the left and right sides of the frame, one end of the connecting rod 5 is rotatably connected to the pull rod 4 through the fourth shaft 14, and the other end of the connecting rod 5 is rotatably connected to the lower end of the upper push rod 32 through the sixth shaft 16, wherein the sixth shaft 16 is located below the fifth shaft 15 on the upper push rod 32.

As shown in the drawings, a seat rod 6 extending in the front-rear direction is also provided on the left and right sides of the frame, the rear portion of the seat rod 6 is rotatably connected to the connecting rod 5 via the seventh shaft 17, and the front portion of the seat rod 6 is connected to the lower push rod 31 in a relatively rotatable manner and in a relatively slidable manner along its own length direction. Specifically, a sliding member 7 is rotatably connected to the lower push rod 31, and the sliding member 7 is a sliding sleeve, which is slidably sleeved on the seat rod 6 along the length extension direction of the seat rod 6. The sliding sleeve 7 is located above the third shaft 13 on the lower push rod 31.

1 and 2 , when the stroller of the present embodiment is in the unfolded state, the front support 1 and the rear support 2 are unfolded in the front-to-rear direction to form a stable supporting chassis, the push rod assembly 3 and the pull rod 4 extend in the up-down direction, and the seat rod 6 is arranged between the lower push rod 31 and the connecting rod 5 to provide a stable sitting support.

When the stroller needs to be folded, as shown in Figures 3 and 4, the upper push rod 32 is pushed to flip it relative to the lower push rod 31, and the lower push rod 31 is gradually flipped downward toward the rear support 2. Driven by the connecting rod 5 and the pulling rod 4, the upper push rod 32, the lower push rod 31, the connecting rod 5, the seat rod 6, and the pulling rod 4 are gradually retracted with the rear support 2 in the up and down direction, and the front support 1 slides backward and gradually retracts with the rear support 2 in the front and back direction, and the distance between the front wheel 10 and the rear wheel 20 in the front and back direction is reduced, and the overall folding of the frame is gradually achieved.

The folded frame is shown in Figures 5 and 6. The upper push rod 32, the lower push rod 31, the connecting rod 5 and the pull rod 4 are stacked and gathered above the front bracket 1 and the rear bracket 2. All the rods are tightly gathered together to present a very flat structure. The size in the front and rear direction is greatly shortened, and the overall size of the frame is reduced after folding.

On the contrary, when the stroller is to be opened for use, the upper push rod 32 only needs to be pulled upwards, so that the lower push rod 31, the connecting rod 5 and the pull rod 4 can be linked to unfold, and the front support 1 can slide forward relative to the rear support 2 and unfold along the front-to-back direction, so that the frame can be opened for use, and the operation is also very convenient.

Example 2

Referring to the stroller shown in FIGS. 7 to 12 , the main difference between the stroller and the embodiment 1 is that the frame of the embodiment lacks the connecting rod 5 and the seat rod 6. When folding, the push rod assembly 3 needs to be folded first, that is, the upper push rod 32 is turned over and folded relative to the lower push rod 31, and then the entire push rod assembly 3 is driven to rotate backward to gradually turn over and move closer to the rear bracket 2, so that the pull rod 4 can drive the front bracket 1 to slide backward and gradually fold with the rear bracket 2 in the front-to-back direction, and the distance between the front wheel 10 and the rear wheel 20 in the front-to-back direction is reduced, and the overall folding of the frame is gradually achieved.

In summary, the child stroller of the present invention has a small number of rods, a simple structure, and is convenient to fold and unfold. After folding, the front and rear dimensions of the frame are shortened and the overall structure is flat, which brings convenience to users' daily storage 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 (8)

1. A stroller for children, comprising a frame with an unfolded state and a folded state, a front wheel arranged at a front bottom portion of the frame, a rear wheel arranged at a rear bottom portion of the frame, and a locking mechanism for locking the frame in the unfolded state, characterized in that the frame comprises a front bracket, a rear bracket, a push rod assembly and a pull rod, the front wheel being connected to a bottom portion of the front bracket, the rear wheel being connected to a bottom portion of the rear bracket, the front bracket and the rear bracket being connected so as to be slidable relative to each other in a front-to-rear direction, the lower portion of the push rod assembly being rotatably connected to one end portion of the rear bracket, the pull rod being rotatably connected between the push rod assembly and the front bracket, and the rotational connection position between the pull rod and the front bracket being located at the rotational connection position between the push rod assembly and the rear bracket When the bicycle frame is in a folded state, the front bracket and the rear bracket slide relative to each other and are retracted in the front-to-back direction, and the distance between the front wheel and the rear wheel in the front-to-back direction is reduced, wherein the push rod assembly includes a lower push rod and an upper push rod, the lower part of the lower push rod is rotatably connected to the rear bracket, and the upper part of the lower push rod is rotatably connected to the upper push rod, the frame also includes a connecting rod and a seat rod extending in the front-to-back direction, one end of the connecting rod is rotatably connected to the pull rod, and the other end of the connecting rod is rotatably connected to the lower end of the upper push rod, the rear part of the seat rod is rotatably connected to the connecting rod, and the front part of the seat rod can be connected to the lower push rod both relatively rotatably and relatively slidably along its own length direction. 2. The stroller according to claim 1, wherein the front bracket and the rear bracket both extend in the front-to-back direction, and the front bracket is connected to the rear bracket in a relatively sliding manner along the length extension direction of the rear bracket. 3. The stroller according to claim 2, wherein the rear support comprises a rear support rod body and a sliding guide member fixedly arranged at the front portion of the rear support rod body, and the front support and the sliding guide member are connected in a relatively sliding manner. 4. The stroller according to claim 3 is characterized in that the lower part of the push rod assembly is rotatably connected to the sliding guide, and the lower part of the pull rod is rotatably connected to the rear part of the front bracket through a rotating shaft, and the rotating shaft is located behind the sliding guide. 5. The stroller according to claim 3, characterized in that: the sliding guide member has a guide hole penetrating along the front-to-back direction, and the front bracket is relatively slidably arranged in the guide hole along the front-to-back direction. 6. The stroller according to claim 1, characterized in that a sliding member is rotatably connected to the lower push rod, and the sliding member is relatively slidably arranged on the seat rod along the length extension direction of the seat rod. 7. The stroller according to claim 1, characterized in that: when the frame is in a folded state, the front bracket and the rear bracket are folded in the front-to-back direction, and the upper push rod, the lower push rod and the connecting rod are stacked and folded above the front bracket and the rear bracket in the up-down direction. 8. A stroller according to any one of claims 1 to 7, characterized in that: the front bracket includes two front support rods respectively arranged on the left and right sides, the rear bracket includes two rear support rods respectively arranged on the left and right sides, the front support rods and the rear support rods are connected to each other in a relatively sliding manner along the front and rear directions on the left and right sides of the frame, the front wheels are connected to the front parts of the front support rods, the rear wheels are connected to the rear parts of the rear support rods, and a group of the push rod assembly and the pull rod are respectively provided on the left and right sides of the frame.