CN104354746A - Foldable children stroller - Google Patents

Abstract

The invention relates to a foldable children's stroller, which comprises a stroller frame, a front wheel assembly and a rear wheel assembly, and a locking mechanism. The side frame includes a front wheel bracket, a push rod whose lower end is rotatably connected to the upper end of the front wheel bracket, and a rear wheel bracket whose upper end is rotatably connected to the upper end of the front wheel bracket. The front wheel assembly includes a front wheel, a front wheel Wheel joints, the front wheel joints include two ends of the front wheel support connectors that are rotatably connected to the lower ends of the front wheel supports on both sides. It includes a bottom brace whose front end is rotatably connected to the front wheel joint. The cross brace includes a rear cross brace that is arranged between the rear wheel brackets on both sides and can be folded laterally. The rear end of the bottom brace rotates with the rear cross brace. connect. The cart of the invention has the advantages of simple structure, small folding volume and convenient folding operation.

Description

A collapsible stroller for children

technical field

The invention relates to a foldable stroller for children.

Background technique

The foldable stroller is mainly realized by setting a stroller frame with an open state and a folded state. In order to realize the function of folding, the main components that make up the stroller frame, such as the front wheel bracket, the rear wheel bracket, the cushion bar, the push handle bar, etc., are arranged to rotate and connect with each other, and the specific structural designs are varied. Designing a baby stroller that is easy to fold, small in size and low in cost is the goal pursued by the designers of the stroller, and it is also the key to making the stroller products competitive in the market.

At present, there are mainly two types of foldable strollers: three-wheeled and four-wheeled. Among them, the three-wheeled stroller cannot be folded horizontally, and the folding volume is relatively large.

Contents of the invention

The technical problem to be solved by the present invention is to provide a foldable children's stroller with small folding volume and convenient folding operation. the

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A foldable children's pushchair, comprising a pushcart frame with an unfolded state and a folded state, a front wheel assembly and a rear wheel assembly, a locking mechanism for locking the pushcart frame in the unfolded state, the pushcart frame includes Side brackets, cross braces arranged between the side brackets on both sides, the side brackets include front wheel brackets, push rods whose lower ends are rotatably connected to the upper ends of the front wheel brackets, and the upper ends and the upper ends of the front wheel brackets or The lower end of the push rod is rotatably connected to the rear wheel bracket. The front wheel assembly includes the front wheel and the front wheel joint. The trolley frame also includes a bottom strut whose front end is rotatably connected to the front wheel joint. It is rotatably connected with the rear cross brace, the lower end of the front wheel bracket has a first slope, the two ends of the front wheel bracket connecting piece respectively have a second slope matched with the first slope, and the lower end of the front wheel bracket is connected with the front wheel bracket The two ends of the component are rotatably connected through the first pivot passing through the first inclined plane and the second inclined plane respectively, and when folded, the first inclined plane and the second inclined plane rotate relative to each other so that the front wheel brackets on both sides are relatively close together laterally.

Further, the first inclined plane, the second inclined plane and the first pivot are not perpendicular to each other, and the space between the two first inclined planes or the two second inclined planes located on the two side brackets is in a state of opening from bottom to top and outward.

Preferably, the upper end of the front wheel bracket or the lower end of the push rod is fixedly provided with a joint, the joint has a third slope, the upper end of the rear wheel bracket has a fourth slope matched with the third slope, and the upper end of the rear wheel bracket is connected to the third slope. The joint is rotatably connected by the second pivot passing through the third inclined plane and the fourth inclined plane. When folding, the third inclined plane and the fourth inclined plane rotate relative to each other so that the rear wheel bracket draws inward and transversely relative to the front wheel bracket at the same time. . Further, the third inclined plane and the fourth inclined plane are not perpendicular to the second pivot, and the two third inclined planes located on the two side brackets are in a state of approaching from bottom to top and inward.

According to a specific and preferred aspect of the present invention, the joint is fixed on the front wheel bracket, the joint also has a fifth inclined plane, the lower end of the push rod has a sixth inclined plane matched with the fifth inclined plane, and the lower end of the push rod is in contact with the fifth inclined plane. The joint is rotatably connected through a third pivot passing through the fifth inclined plane and the sixth inclined plane. When folding, the fifth inclined plane and the sixth inclined plane rotate relative to each other so that the push rod can be drawn inwardly when the front wheel bracket is drawn closer.

According to a specific aspect, a handle is provided on the rear end of the bottom brace for easy operation.

Further, the cross brace frame also includes a push rod cross brace arranged between the push rods on both sides, and the push rod cross brace includes a first cross brace and a second cross brace whose ends are rotatably connected. The other ends of the first cross brace and the second cross brace are respectively rotatably connected with the upper ends of the push rods on both sides.

Further, the locking mechanism includes a locking unit arranged between the first cross brace and the second cross brace for relatively locking the two.

Further, a push handle is provided on the upper end of the push rod.

According to a specific aspect of the present invention, the rear cross brace includes a vertical connecting rod located at the rear middle of the cart and extending in the vertical direction; and the lower connection seat, the first cross bar and the second cross bar whose inner ends are rotatably connected with the opposite two sides of the upper connection seat respectively, and the third cross bar and the third cross bar whose inner ends are respectively rotatably connected with the opposite two sides of the lower connection seat. The fourth horizontal bar, the first diagonal bar and the second horizontal bar whose upper ends are rotatably connected to the opposite two sides of the middle connecting seat, the first horizontal bar, the second horizontal bar, the third horizontal bar and the fourth horizontal bar are all horizontal set, and their outer ends are all rotatably connected with the rear wheel bracket on the same side, and the lower ends of the first slant bar and the second slant bar are respectively rotatably connected with the third cross bar and the fourth cross bar.

Preferably, the first horizontal bar, the second horizontal bar, the third horizontal bar, the fourth horizontal bar, the first oblique bar and the second oblique bar are all arc-shaped.

Specifically, the rear end of the bottom brace is rotatably connected to the upper connecting seat. A handle is arranged on the rear end of the bottom brace or on the upper connecting seat.

Specifically, the bottom brace is rotatably connected to the front wheel joint through a horizontal pivot extending in the horizontal direction.

Specifically, the bottom brace is also rotatably connected to the rear brace through a horizontal pivot extending in the horizontal direction.

Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

The pushcart of the present invention can be folded not only vertically and up and down, but also horizontally, with small folding volume and convenient folding operation. Meanwhile, the present invention has simple structure and convenient installation.

Description of drawings

Fig. 1 is a three-dimensional schematic view (in an unfolded state) of a foldable stroller for children according to the present invention;

Fig. 2 is a schematic side view of Fig. 1;

Fig. 3 is a schematic diagram of the axis side of the foldable stroller for children according to the present invention;

Fig. 4 is the connection schematic diagram of front wheel bracket connector and front wheel bracket;

Fig. 5 is the connection diagram of front wheel support, push rod and rear wheel support;

Fig. 6 is a three-dimensional schematic diagram of the foldable stroller for children according to the present invention during the folding process;

Figure 7 is a schematic side view of Figure 6;

Fig. 8 is a schematic diagram of the foldable stroller of Fig. 6 after being further folded;

Fig. 9 is a schematic side view of Fig. 8;

Fig. 10 is a three-dimensional schematic diagram (in a folded state) of a foldable stroller for children according to the present invention;

Figure 11 is a schematic side view of Figure 10;

Among them: 1. Front wheel assembly; 10. Front wheel; 11. Front wheel joint; 110. Front wheel support connector; 2. Rear wheel assembly; 3. Side support; 30. Front wheel support; 31. Push rod; 32 , rear wheel bracket; 33, push handle; 4, bottom support rod; 4a, horizontal pivot; 5, rear cross brace; 50, longitudinal link; 51, upper connecting seat; 52, middle connecting seat; Seat; 54, the first cross bar; 55, the second cross bar; 56, the third cross bar; 57, the fourth cross bar; 58, the first slanting bar; 59, the second slanting bar; 6, the handle; 7, Push rod cross brace; 70, first cross brace; 71, second cross brace; 8, locking unit; 9, step; a, first pivot; b, second pivot; c, third pivot axis.

Detailed ways

Referring to Figures 1 to 11, this example provides a foldable children's stroller, which includes a stroller frame in an unfolded state and a folded state, a set of front wheel assemblies 1 and two sets of rear wheel assemblies 2, used to push the stroller A locking mechanism that locks the shelf in the unfolded state.

The stroller frame includes side supports 3 on both sides, and a cross brace arranged between the side supports 3 on both sides. The side support 3 further comprises a front wheel support 30, a push rod 31 whose lower end is rotatably connected with the upper end of the front wheel support 30, a rear wheel support 32 whose upper end is rotatably connected with the upper end of the front wheel support 30, and is arranged on the push rod. The push handle 33 on the rod 31 upper end. The front wheel brackets 31 located on both sides are arranged non-parallel, and they are roughly arranged in an arc shape with a large distance between the upper end and a small distance between the two lower ends, and the push rods 33 located on both sides are also arranged non-parallel. It is roughly arranged in an arc shape with a large distance between the two lower ends and a small distance between the two upper ends. The front wheel assembly 1 includes a front wheel 10 and a front wheel joint 11, and the front wheel joint 11 includes a front wheel bracket connecting member 110 whose two ends are rotatably connected to the lower ends of the front wheel brackets 30 on both sides. Further, the lower end of the front wheel bracket 30 has a first slope A, and the two ends of the front wheel bracket connector 110 respectively have a second slope B matching the first slope A, and the lower end of the front wheel bracket 30 is connected to the front wheel. The two ends of the bracket connector 110 are rotatably connected through the first pivot a passing through the first inclined plane A and the second inclined plane B respectively, the first inclined plane A and the second inclined plane B are not perpendicular to the first pivot a, Between the two first slopes A or between the two second slopes B is in a state of opening from bottom to top and outward. The upper end of front wheel support 30 is fixedly provided with joint 300, and this joint 300 has the 3rd slope C, and the upper end of rear wheel support 32 has the 4th slope D that cooperates with the 3rd slope C, and the upper end of rear wheel support 32 and joint 300 is rotatably connected through the second pivot b passing through the third inclined plane C and the fourth inclined plane D, the third inclined plane C and the fourth inclined plane D are not perpendicular to the second pivot axis b, and the two third inclined planes C form The state of shrinking from bottom to top. The setting of the two sets of slopes can make the front wheel brackets 30 and the rear wheel brackets 32 on both sides fold inward and laterally relative to each other when folding, thereby reducing the lateral dimension. In addition, the joint 300 can also have a fifth slope, the lower end of the push rod 31 has a sixth slope matched with the fifth slope, and the lower end of the push rod 31 and the joint 300 pass through the third pivot through the fifth slope and the sixth slope. Shaft c is rotationally connected.

The stroller frame also includes a bottom brace 4 whose front end is rotatably connected to the front wheel joint 11 through a horizontal pivot 4a extending in the horizontal direction. The cross brace includes a rear cross brace 5 which is arranged between the rear wheel brackets 32 on both sides and which can be folded laterally. The rear end of the bottom brace 4 is rotatably connected to the rear cross brace 5 .

Further, the rear cross brace 5 includes a vertical connecting rod 50 located at the rear middle of the cart and extending vertically, and an upper connecting seat 51, a middle connecting seat 52 and a lower connecting seat 51 arranged on the longitudinal connecting rod 50 from top to bottom. Seat 53, the first crossbar 54 and the second crossbar 55 whose inner ends are rotatably connected with the opposite two sides of the upper connecting seat 51 respectively, and the third crossbar 55 whose inner ends are rotatably connected with the opposite two sides of the lower connecting seat 53 respectively. Rod 56 and the fourth cross bar 57, the first oblique rod 58 and the second oblique rod 59 that the upper end part is connected with the relative two sides of connecting base 52 respectively in rotation, the first cross bar 54, the second cross bar 55, the third The cross bar 56 and the fourth cross bar 57 are all horizontally arranged, and their outer ends are all rotatably connected with the rear wheel bracket 32 on the same side, and the lower ends of the first inclined bar 58 and the second inclined bar 59 are respectively connected with the third The cross bar 56 is rotatably connected with the fourth cross bar 57 . The rotational connections are all pivoted. The first horizontal bar 54 , the second horizontal bar 55 , the third horizontal bar 56 , the fourth horizontal bar 57 , the first oblique bar 58 and the second oblique bar 59 are all arc-shaped. The rear end of the bottom brace 4 is connected to the upper connection seat 51 through a pivot extending in the horizontal direction, and a handle 6 is provided at the rear end of the bottom brace 4 . In addition, a foot 9 is provided on the lower connecting seat 53 .

Further, the cross brace also includes a push rod cross brace 7 arranged between the push rods 31 on both sides, and the push rod cross brace 7 includes a first cross brace 70 and a second cross brace rotatably connected at one end. 71 , the other ends of the first cross brace 70 and the second cross brace 71 are respectively rotatably connected to the upper ends of the push rods 31 on both sides. The locking mechanism includes a locking unit 8 disposed between the first cross brace 70 and the second cross brace 71 for relatively locking the two.

The folding process of the stroller in this example is as follows:

Step 1: Unlock the locking unit 8 at the cross brace 7 of the push rod, and then turn the push rod 31 forward as a whole, as shown in Figures 6 and 7, until the push rod 31 is completely close to the front wheel bracket 31;

Step 2: Referring to Figure 7, lift the handle 6 upwards, rotate the bottom support bar 4 around the horizontal pivot 4a, and at the same time pull the front wheel joint 11 to rotate in the direction of the rear wheel bracket 32, so that the first inclined plane A is opposite to the second inclined plane B Rotate so that the front wheel brackets 30 on both sides are relatively retracted inwardly and horizontally while rotating and moving closer to the rear wheel brackets 32. When the handle 6 is pulled upwards, the rear cross brace 5 is laterally retracted, driving the rear wheel brackets 32 on both sides to At the same time, due to the fit between the rear wheel bracket 32 and the joint 300, when the rear wheel bracket 32 draws closer to the front wheel bracket 30, the rear wheel bracket 32 itself is also relatively folded inward relative to the front wheel bracket 30, and finally As shown in Figures 10 and 11, it can be seen from Figure 10 that after folding, the front wheel brackets and the rear wheel brackets on both sides are relatively inward, and the rear wheel brackets 32 and push rods 31 are located on the front wheel brackets 30. Compared with the volume before folding, the volume of the stroller is greatly reduced after folding, which is convenient for packaging, transportation and carrying.

In the present embodiment, the joint is fixed on the front wheel support, and the push rod and the rear wheel support are rotatably connected on the joint. As a variation of this embodiment, the joint is fixed on the lower end of the push rod. At this time, the front wheel support and the rear wheel support are rotatably connected to the joint through a pivot. The folding process of this structure is the same as that of the above-mentioned embodiment.

The present invention has been described in detail above, and its purpose is to allow those familiar with this field to understand the content of the present invention and implement it, and can not limit the protection scope of the present invention with this. Effect changes or modifications shall be covered within the protection scope of the present invention .

Claims (10)

1. A collapsible children's stroller, comprising a pushcart frame with an unfolded state and a folded state, a front wheel assembly and a rear wheel assembly, a locking mechanism for locking the pushcart frame in the unfolded state, the pushcart The frame includes side brackets on both sides, and a cross bracket arranged between the side brackets on both sides. The rod, the rear wheel bracket whose upper end is rotatably connected to the upper end of the front wheel bracket or the lower end of the push rod, the front wheel assembly includes a front wheel and a front wheel joint, and it is characterized in that: the front wheel The wheel joint includes two ends of the front wheel support connectors that are rotatably connected to the lower ends of the front wheel supports on both sides, and the trolley frame also includes a bottom brace whose front end is rotatably connected to the front wheel joints, The cross brace includes a horizontally foldable rear cross brace arranged between the rear wheel brackets on both sides, the rear end of the bottom brace is rotatably connected to the rear cross brace, and the The lower end of the front wheel bracket has a first slope, and the two ends of the front wheel bracket connecting piece respectively have a second slope matched with the first slope, and the lower end of the front wheel bracket is connected to the front The two ends of the wheel bracket connecting piece are respectively rotatably connected through the first pivot passing through the first inclined plane and the second inclined plane. When folding, the first inclined plane and the second inclined plane rotate relatively so that the front wheels on both sides The brackets are relatively close together laterally. 2. The foldable baby stroller according to claim 1, characterized in that: the first slope, the second slope and the first pivot are not perpendicular to each other, and are located between the two first slopes on the brackets on both sides. Occasionally, the space between the two second slopes is open from bottom to top. 3. The foldable children's stroller according to claim 1, characterized in that: the upper end of the front wheel bracket or the lower end of the push rod is fixedly provided with a joint, the joint has a third slope, the The upper end of the rear wheel bracket has a fourth inclined plane matched with the third inclined plane, the upper end of the rear wheel bracket and the joint rotate through the second pivot passing through the third inclined plane and the fourth inclined plane When being connected and folded, the third inclined plane and the fourth inclined plane are rotated relative to each other so that the rear wheel bracket is relatively folded inward and laterally while moving closer to the front wheel bracket. 4. The foldable baby stroller according to claim 3, characterized in that: the joint is fixed on the front wheel bracket, the joint also has a fifth slope, and the lower end of the push rod has a The sixth inclined surface matched with the fifth inclined surface, the lower end of the push rod is connected with the joint through the third pivot passing through the fifth inclined surface and the sixth inclined surface. When folding, the fifth inclined surface and the sixth inclined surface The relative rotation of the six inclined planes makes the push rod draw inward when drawing closer to the front wheel support. 5. The foldable stroller for children according to claim 3, characterized in that: the third inclined plane and the fourth inclined plane are not perpendicular to the second pivot, and are located between the two third inclined planes on the brackets on both sides. The space is in a state of approaching from bottom to top. 6. The foldable children's stroller according to claim 1, wherein a handle is provided on the rear end of the bottom stay. 7. The foldable children's stroller according to claim 1, wherein the cross brace further includes a push rod cross brace arranged between the push rods on both sides, and the push rod cross brace includes an end The first cross brace and the second cross brace are rotatably connected, and the other ends of the first cross brace and the second cross brace are respectively rotatably connected with the upper ends of the push rods on both sides . 8. The foldable children's stroller according to any one of claims 1-7, wherein the rear cross brace includes a vertical connecting rod located at the rear middle of the stroller and extending along the vertical direction, The upper connection seat, the middle connection seat and the lower connection seat are sequentially arranged on the longitudinal connecting rod from top to bottom, and the inner ends are respectively connected with the first horizontal bar and the second A cross bar, a third cross bar and a fourth cross bar whose inner ends are rotatably connected to the opposite two sides of the lower connecting seat, and a first diagonal bar whose upper end is respectively rotatably connected to the opposite two sides of the middle connecting seat and the second diagonal bar, the first cross bar, the second cross bar, the third cross bar and the fourth cross bar are all arranged horizontally, and their outer ends are all connected to the same side of the rear wheel bracket Rotationally connected, the lower ends of the first slanting bar and the second slanting bar are respectively rotatably connected with the third cross bar and the fourth cross bar. 9. The foldable baby stroller according to claim 8, characterized in that: the rear end of the bottom brace is rotatably connected to the upper connecting seat, and the rear end of the bottom brace or A handle is arranged on the upper connecting seat. 10. The foldable stroller for children according to claim 1, characterized in that: said bottom brace is rotatably connected to said front wheel joint through a horizontal pivot extending along the horizontal direction.