CN108482473B - Baby stroller - Google Patents

Abstract

The invention discloses a baby carrier, wherein a frame comprises a chassis, the chassis comprises a front bottom rod extending along the front-back direction, a rear bottom rod, a sliding piece and a swing rod, the front bottom rod is connected with the rear part of the front bottom rod in a pivot manner, the sliding piece is arranged on the front bottom rod in a sliding manner along the length extending direction of the front bottom rod, the front part of the swing rod is connected with the sliding piece in a pivot manner, the rear part of the swing rod is connected with the rear bottom rod in a pivot manner, the rear wheel assembly is arranged at the rear part of the rear bottom rod, when the frame is converted from an unfolding state to a folding state, the sliding piece moves forwards along the front bottom rod, the swing rod pulls the rear bottom rod and the rear wheel assembly to turn forwards and fold under the front bottom rod, so that the size of the frame in the front-back direction after folding is reduced, and a new way and thinking are provided for miniaturization and compactness of the folding of the frame.

Description

Baby stroller

Technical Field

The invention relates to a baby carriage.

Background Art

In the prior art, there are various structures of baby strollers, which usually include a stroller frame with an unfolded state and a folded state, a wheel assembly arranged at the bottom of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state. At present, there are many types of baby stroller frames, and the number of rods of the frames is different. The connection relationship and connection position between the rods are different, so the folding principle and folding method are also different. How to simplify the structure of the stroller frame and simplify the folding method of the stroller frame under the premise of ensuring stable carrying and pushing of children has always been the goal pursued by those skilled in the art.

Summary of the invention

The object of the present invention is to provide a baby carriage with a simple structure, a compact frame structure after folding and greatly reduced front and rear dimensions.

To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a baby carriage, comprising a frame with an unfolded state and a folded state, a front wheel assembly arranged at the front bottom of the frame, a rear wheel assembly arranged at the rear bottom of the frame, and a locking mechanism for locking the frame in the unfolded state, the frame comprising a chassis, the chassis comprising a front bottom bar extending in the front-to-back direction, a rear bottom bar pivotally connected at the front to the rear of the front bottom bar, a sliding member slidably arranged on the front bottom bar along the length extension direction of the front bottom bar, and a swing rod pivotally connected to the sliding member at the front and pivotally connected to the rear bottom bar at the rear, the rear wheel assembly being arranged at the rear of the rear bottom bar, and when the frame is converted from the unfolded state to the folded state, the sliding member moves forward along the front bottom bar, and the swing rod pulls the rear bottom bar and the rear wheel assembly to flip forward and fold under the front bottom bar.

Preferably, when the vehicle frame is in the unfolded state, the front bottom bar extends horizontally along the front-rear direction, and the rear bottom bar extends upwardly from the rear to the front.

Further preferably, the base frame has two groups arranged on the left and right sides, each group of the rocker arms includes a front rod section parallel to the front bottom rod, and a rear rod section extending backward from the rear end of the front rod section and parallel to the rear bottom rod; when the frame is in the unfolded state, the two groups of the rocker arms are located between the two groups of the front bottom rods and the rear bottom rods along the left and right direction.

Preferably, a guide groove extending in the front-to-back direction is provided on the front bottom rod, and the sliding member includes a slider slidably arranged in the guide groove and rollers arranged at both ends of the slider, and the rollers can be supported on the groove wall of the guide groove in a rolling manner in the front-to-back direction.

Preferably, the front wheel assembly includes a front wheel frame and a front wheel arranged at the bottom of the front wheel frame, the upper part of the front wheel frame can be connected to the bottom front part of the frame in a flipping manner along the front and rear directions, and when the frame is in a folded state, the front wheel frame flips backwards and is located under the front bottom bar.

Further preferably, the upper pivot of the front wheel frame is connected to the front part of the front bottom bar.

As a specific implementation manner, the frame at least further includes a driving rod for driving the sliding member to move forward along the front bottom rod when the frame changes from the unfolded state to the folded state.

Preferably, the driving rod is connected to the sliding member or the driving rod is connected to the rocker arm, and when the frame is converted from an unfolded state to a folded state, the driving rod is rotated and retracted relative to the front bottom bar and drives the sliding member to move forward along the front bottom bar.

Further preferably, the front portion of the rocker arm is pivotally connected to the sliding member via a first axis, the end portion of the driving rod is pivotally connected to the front portion of the rocker arm via a second axis, and the axis lines of the first axis and the second axis are arranged parallel to each other.

Preferably, the frame also includes a front support rod and a push rod, the lower part of the front support rod is pivotally connected to the front part of the front bottom rod, the lower part of the push rod is pivotally connected to the upper part of the front support rod through a third axis, the drive rod extends in the up and down directions, the upper part of the drive rod is pivotally connected to the lower part of the push rod through a fourth axis, the lower part of the drive rod is pivotally connected to the sliding member or pivotally connected to the rocker arm, wherein the axis lines of the third axis and the fourth axis extend parallel to or colinearly with each other.

Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the present invention proposes a baby carriage, on which a front bottom bar, a rear bottom bar, a sliding member and a rocker arm are arranged on the chassis, so that during the folding process of the frame, the sliding member can be driven to move forward along the front bottom bar, so that the rocker arm can pull the rear bottom bar and the rear wheel assembly to flip and fold toward the bottom of the front bottom bar, thereby reducing the size of the frame in the front and rear directions after folding, providing a new way and idea for the miniaturization and compactness of the frame folding, and its structural principle is simple and reliable, easy to operate, and suitable for various types of baby carriage products.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is an axonometric view of the present invention in an unfolded state;

Figure 2 is a side view of the present invention in an unfolded state;

Figure 3 is an enlarged view of Figure 2 at point A;

Figure 4 is an axonometric view of the present invention in a semi-folded state;

Figure 5 is a side view of the present invention in a semi-folded state;

Figure 6 is an axonometric view of the present invention in a folded state;

Figure 7 is a side view of the present invention in a folded state;

Among them: 1. front wheel assembly; 11. front wheel frame; 12. front wheel; 2. rear wheel assembly; 3. chassis; 31. front bottom bar; 32. rear bottom bar; 33. sliding member; 34. slider; 35. roller; 36. guide slide; 37. rocker bar; 371. front bar section; 372. rear bar section; 4. driving rod; 5. front support rod; 6. push rod; 7. push handle; 8. cross brace rod system; 81. driving rod cross brace rod; 82. front bottom bar cross brace rod; 83. rear bottom bar cross brace rod; 10. first axis; 20. second axis; 30. third axis; 40. fourth axis.

DETAILED DESCRIPTION

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

1 to 7 , the baby carriage includes a frame having an unfolded state and a folded state, a front wheel assembly 1 disposed at the front bottom of the frame, a rear wheel assembly 2 disposed at the rear bottom of the frame, and a locking mechanism for locking the frame in the unfolded state.

As shown in the drawings, the frame includes two groups of bottom frames 3 arranged on the left and right sides, each group of bottom frames 3 includes a front bottom bar 31 extending in the front-to-back direction, a rear bottom bar 32 pivotally connected to the rear of the front bottom bar 31 at the front, a sliding member 33 slidably arranged on the front bottom bar 31 along the length extension direction of the front bottom bar 31, and a swing rod 37 pivotally connected to the sliding member 33 at the front and pivotally connected to the rear bottom bar 32 at the rear, and the rear wheel assembly 2 is arranged at the rear of the rear bottom bar 32. In this way, when the sliding member 33 moves forward along the front bottom bar 31, the swing rod 37 can pull the rear bottom bar 32 and the rear wheel assembly 2 to flip forward and fold under the front bottom bar 31, so that the bottom frame 3 is folded and the size of the bottom frame 3 in the front-to-back direction is reduced.

Specifically, the swing bar 37 includes a front bar section 371 parallel to the front bottom bar 31, and a rear bar section 372 extending backward from the rear end of the front bar section 371 and parallel to the rear bottom bar 32. When the frame is in the unfolded state, the front bottom bar 31 extends in the front-to-back direction, and the rear bottom bar 32 extends upward from the rear to the front. The two sets of swing bars 37 are located between the two sets of front bottom bars 31 and the rear bottom bars 32 in the left-right direction. When viewed from the side of the frame, the swing bars 37 are blocked by the front bottom bars 31 and the rear bottom bars 32 on the corresponding sides, making the appearance of the chassis 3 look simpler.

As shown in Figures 1 to 3, a guide groove 36 extending along the front-to-back direction is provided on the front bottom rod 31, and the sliding member 33 includes a slider 34 slidably arranged in the guide groove 36 and two rollers 35 respectively arranged at the front and rear ends of the slider 34, and the rollers 35 can be supported on the groove wall of the guide groove 36 in a rolling manner along the front-to-back direction.

As shown in Figs. 1, 2, 6 and 7, the front wheel assembly 1 includes a front wheel frame 11 whose upper part is pivotally connected to the front part of the front bottom bar 31 and a front wheel 12 arranged at the bottom of the front wheel frame 11. The upper part of the front wheel frame 11 can be connected to the bottom front part of the frame in a flipping manner along the front-to-back direction. When the frame is folded, the front wheel frame 11 flips backward and is located below the front bottom bar 31, and is close to the rear wheel assembly 2, further reducing the height dimension of the frame after folding. In this embodiment, the upper part of the front wheel frame 11 is pivotally connected to the front part of the front bottom bar 31.

As shown in the drawings, the frame is also provided with a driving rod 4 for driving the sliding member 33 to move forward along the front bottom bar 31 when the frame is switched from the unfolded state to the folded state, so that during the folding process of the frame, the movement of the driving rod 4 automatically drives the sliding member 33 to move forward along the front bottom bar 31, realizing the automatic flipping and folding of the rear bottom bar 32 and the rear wheel assembly 2 during the folding process of the frame, and during the unfolding process of the frame, the movement of the driving rod 4 drives the sliding member 33 to move backward along the front bottom bar 31, synchronously realizing the automatic flipping and opening of the rear bottom bar 32 and the rear wheel assembly 2. In a specific configuration, the driving rod 4 is connected to the sliding member 33 or to the swing rod 37, and when the frame is switched from the unfolded state to the folded state, the driving rod 4 rotates and closes relative to the front bottom bar 31, and drives the sliding member 33 to move forward along the front bottom bar 31 at the same time.

Here, the front portion of the swing rod 37 is pivotally connected to the sliding member 33 via the first shaft 10, and the end of the driving rod 4 is pivotally connected to the front portion of the swing rod 37 via the second shaft 20, and the axis lines of the first shaft 10 and the second shaft 20 are arranged parallel to each other. In some other embodiments, the first shaft 10 and the second shaft 20 can also be arranged coaxially.

As shown in Fig. 1 and Fig. 2, in this embodiment, the frame further includes two groups of front support rods 5 and push rods 6 respectively arranged on the left and right sides. On the left and right sides of the frame, the lower part of the front support rod 5 is pivotally connected to the front part of the front bottom rod 31, and the upper part of the front support rod 5 is pivotally connected to the lower part of the push rod 6 through the third shaft 30. The driving rod 4 is a support rod extending in the up-down direction, and the upper part of the driving rod 4 is pivotally connected to the lower part of the push rod 6 through the fourth shaft 40, and the lower part of the driving rod 4 is pivotally connected to the front part of the swing rod 37 through the second shaft 20. The axis lines of the first shaft 10, the second shaft 20, the third shaft 30 and the fourth shaft 40 are arranged parallel to each other.

The frame further comprises a push handle 7 and a cross brace 8. The push handle 7 is a U-shaped rod, and the lower parts of the two ends are respectively pivotally connected to the upper parts of the push rods 6 on both sides so as to be able to be turned and folded relative to the push rods 6. The cross brace 8 comprises a driving rod cross brace 81 connecting the driving rods 4 on both sides, a front bottom rod cross brace 82 connected to the front ends of the front bottom rods 31 on both sides, and a rear bottom rod cross brace 83 connected between the rear bottom rods 32 on both sides.

Referring to Figures 1 and 2, when the frame of this embodiment is in the unfolded state, it is locked in the unfolded state by a locking mechanism, and the front wheel assembly 1 and the rear wheel assembly 2 are jointly supported on the ground. The frame has a simple structure and good stability in the unfolded state, and can provide children with stable load-bearing support.

When the frame needs to be folded, as shown in Figures 4 and 5, the push handle 7 is first flipped and folded relative to the push rod 6, and then the push rod 6 is continued to be pressed down to flip it relative to the front support rod 5, which causes the driving rod 4 to rotate relative to the front bottom rod 31 and simultaneously drives the sliding member 33 to move forward along the front bottom rod 31, and then the swing rod 37 pulls the rear bottom rod 32 and the rear wheel assembly 2 to flip forward and gradually fold them under the front bottom rod 31.

After the push rod 6, the front support rod 5, the driving rod 4 and the front bottom rod 31 are folded together in the up-down direction, the rear bottom rod 32 and the rear wheel assembly 2 are also tightly folded under the front bottom rod 31. Finally, the front wheel frame 11 is flipped backward relative to the front bottom rod 1, so that the front wheel assembly 1 is flipped and folded under the front bottom rod 31, so that the front wheel assembly 1 and the rear wheel assembly 2 are both folded under the front bottom rod 31 and close to each other in the front-to-back direction. The folded frame is shown in Figures 6 and 7. The size of the folded frame in the front-to-back direction is greatly reduced, and it presents a very flat and compact structure, which is very convenient for users to store and carry in daily use.

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 comprising a frame having an expanded state and a collapsed state, a front wheel assembly disposed at a front portion of a bottom of the frame, a rear wheel assembly disposed at a rear portion of the bottom of the frame, and a locking mechanism for locking the frame in the expanded state, wherein: the frame comprises a chassis, the chassis comprises a front bottom rod extending along the front-back direction, a rear bottom rod, a sliding piece and a swing rod, the front bottom rod is pivoted with the rear part of the front bottom rod, the sliding piece is slidably arranged on the front bottom rod along the length extending direction of the front bottom rod, the front part of the swing rod is pivoted with the sliding piece, the rear part of the swing rod is pivoted on the rear bottom rod, the rear wheel assembly is arranged at the rear part of the rear bottom rod, when the frame is converted from an unfolding state to a folding state, the sliding piece moves forwards along the front bottom rod, the swing rod pulls the rear bottom rod and the rear wheel assembly to turn forwards and fold under the front bottom rod, the frame further comprises a front supporting rod, a push rod and a driving rod, the lower part of the front supporting rod is pivoted on the front part of the front bottom rod, the lower part of the push rod is pivoted with the upper part of the front supporting rod, one end of the driving rod is pivoted on the sliding piece or pivoted on the swing rod,

When the frame is converted from an unfolding state to a folding state, the driving rod rotates relative to the front bottom rod to fold and drive the sliding piece to move forwards along the front bottom rod; the front strut rotates with the drive rod in a direction considering the front bottom rod, and the drive rod is folded between the front strut and the chassis.

2. A stroller according to claim 1, wherein: when the frame is in a unfolding state, the front bottom rod horizontally extends along the front-back direction, and the rear bottom rod is arranged in a manner of inclining upwards from back to front.

3. A stroller according to claim 2, wherein: the chassis is provided with two groups which are respectively arranged at the left side and the right side, each group of swing rods comprises a front rod section which is parallel to the front bottom rod, and a rear rod section which extends backwards from the rear end of the front rod section and is parallel to the rear bottom rod, and when the frame is in a unfolding state, the two groups of swing rods are positioned between the two groups of front bottom rods and the rear bottom rods along the left-right direction.

4. A stroller according to claim 1, wherein: the front bottom rod is provided with a guide chute extending along the front-rear direction, the sliding piece comprises a sliding block arranged in the guide chute in a sliding fit manner and rollers arranged at two ends of the sliding block, and the rollers can be supported on the wall of the guide chute in a rolling manner along the front-rear direction.

5. A stroller according to claim 1, wherein: the front wheel assembly comprises a front wheel frame and a front wheel arranged at the bottom of the front wheel frame, wherein the upper part of the front wheel frame can be connected to the front part of the bottom of the frame in a turnover way along the front-back direction, and when the frame is in a folding state, the front wheel frame is turned backwards and is positioned below the front bottom rod.

6. A stroller according to claim 5, wherein: the upper part of the front wheel carrier is pivotally connected to the front part of the front bottom rod.

7. A stroller according to any one of claims 1 to 6, wherein:

the front part of the swing rod is pivotally connected with the sliding piece through a first shaft, the end part of the driving rod is pivotally connected with the front part of the swing rod through a second shaft, and the axial leads of the first shaft and the second shaft are mutually parallel.

8. The stroller of claim 7, wherein: the lower part of the push rod is pivotally connected with the upper part of the front support rod through a third shaft, the driving rod extends along the up-down direction, the upper part of the driving rod is pivotally connected with the lower part of the push rod through a fourth shaft, the lower part of the driving rod is pivotally connected with the sliding part or the swing rod, and the axial leads of the third shaft and the fourth shaft extend in parallel or in a collinear manner.