CN108773408B - Child cart - Google Patents

Abstract

The invention discloses a child cart, wherein a rear bracket is telescopic, so that the folded child cart is small in size. The baby carriage comprises a carriage frame with an unfolding state and a folding state, a front wheel assembly and a rear wheel assembly which are arranged at the bottom of the carriage frame, wherein the carriage frame comprises two or more side brackets and a transverse bracket connected between the side brackets; each side bracket comprises a push handle and a rear bracket, the rear bracket comprises an upper rod and a lower rod, the upper rod and the lower rod can be connected in a relatively sliding manner, and the rear wheel assembly is arranged at the lower end part of the lower rod; each side bracket also comprises a connecting rod assembly used for driving the lower rod to slide relative to the upper rod when the pushing handle acts; when the frame is converted from the unfolded state to the folded state, the lower rod slides along the extending direction of the upper rod, and the length of the rear bracket is shortened.

Description

A child stroller

Technical Field

The invention relates to the field of children's products, and in particular to a children's stroller.

Background Art

At present, all strollers can be folded to reduce the size for easy storage. However, after being folded, many strollers have a rear frame that is too long, so that it does not fit the length of the front frame and occupies a large space overall. In order to reduce the length of the rear frame after the stroller is folded, the rear frame of some strollers includes two parts that can rotate relative to each other. Although they can be flipped and folded, they need to be folded again after the frame is folded to further fold and shrink the rear frame. The folding is not convenient, so it is difficult to meet the increasingly high standards of consumer experience and actual needs.

Summary of the invention

The invention provides a child stroller, which solves the problem that a rear support is too long after the child stroller is folded; the rear support is retractable, so that the volume of the folded child stroller is smaller.

In order to achieve the above object, the present invention adopts the following technical scheme:

A baby stroller, comprising a frame with an unfolded state and a folded state, a front wheel assembly and a rear wheel assembly arranged at the bottom of the frame, the frame comprising two or more side brackets and a transverse bracket connected between the side brackets; each of the side brackets comprises a push handle assembly and a rear bracket,

The rear bracket comprises an upper rod and a lower rod, the upper rod and the lower rod are connected to each other in a relatively slidable manner, and the rear wheel assembly is arranged at the lower end of the lower rod;

Each of the side brackets also includes a connecting rod assembly for driving the lower rod to slide relative to the upper rod when the push handle assembly is actuated;

When the vehicle frame is converted from the unfolded state to the folded state, the lower rod slides along the extending direction of the upper rod, and the length of the rear bracket is shortened.

Preferably, the connecting rod assembly comprises:

A driving connecting rod, which is driven to rotate by the push handle assembly during the folding process of the frame;

an upper rod connecting rod, the rear end of which is rotatably connected to the upper rod; and

A lower rod connecting rod, the rear end of which is rotatably connected to the lower rod;

Wherein, the front end portion of the lower rod link is rotatably and slidably connected to the upper rod link, and the lower end portion of the driving link is rotatably connected to the lower rod link, and when the frame is in an unfolded state, the front end portion of the lower rod link is connected to the first position of the upper rod link; when the frame is in a folded state, the front end portion of the lower rod link is connected to the second position of the upper rod link, and the second position is located in front of the first position.

More preferably, the connecting rod assembly further comprises a sliding member slidably connected to the upper rod connecting rod, and the lower end portion of the driving connecting rod, the front end portion of the lower rod connecting rod and the sliding member are rotatably connected.

Furthermore, the sliding member is a sliding sleeve slidably mounted on the upper rod connecting rod.

According to a specific embodiment of the present invention, the push handle assembly includes a push handle and an upper push handle connecting rod whose upper end is rotatably connected to the lower part of the push handle, the upper end of the driving connecting rod is rotatably connected to the lower end of the push handle, and the side bracket also includes a front bracket with the front wheel assembly provided at the lower end and a seat rod rotatably connected to the front bracket; the upper end of the front bracket, the lower end of the push handle upper connecting rod and the upper end of the upper rod are rotatably connected in pairs or coaxially connected; the driving connecting rod is rotatably connected to the upper rod; the front part of the upper rod connecting rod is rotatably connected to the seat rod; when the frame is in a folded state, the lower end of the front bracket, the lower end of the lower rod and the lower end of the push handle are close to each other, and the upper end of the front bracket, the upper end of the upper rod and the upper end of the push handle are close to each other.

According to another specific embodiment of the present invention, the push handle assembly includes a push handle and an upper push handle connecting rod whose upper end is rotatably connected to the lower part of the push handle, and the side bracket also includes a front bracket with the front wheel assembly arranged at the lower end, a seat rod rotatably connected to the front bracket and an armrest rod rotatably connected to the push handle upper connecting rod; the upper end of the front bracket, the lower end of the push handle upper connecting rod and the upper end of the upper rod are rotatably connected in pairs or coaxially connected; the driving connecting rod is rotatably connected to the upper rod and the upper end of the driving connecting rod is rotatably connected to the armrest rod; the front part of the upper rod connecting rod is rotatably connected to the seat rod; when the frame is in a folded state, the lower end of the front bracket, the lower end of the lower rod and the lower end of the push handle are close to each other, and the upper end of the front bracket, the upper end of the upper rod and the upper end of the push handle are close to each other.

According to a preferred embodiment of the present invention, the side bracket further comprises a push handle lower connecting rod whose upper end is rotatably connected to the lower end of the push handle, and the lower end of the push handle lower connecting rod is rotatably connected to the lower rod.

More preferably, when the frame is in the unfolded state, the center line of the push handle lower connecting rod and the center line of the driving connecting rod coincide with each other.

Preferably, the cross support comprises a front cross brace assembly and a rear cross brace assembly;

The front cross brace assembly comprises two first connecting rods which are rotatably connected to each other through a pivot to form a cross-shaped structure, the upper end of each first connecting rod is rotatably connected to the rear end of the seat rod of the two side brackets and/or the front end of the upper rod connecting rod, and the lower end of each first connecting rod is rotatably connected to the lower end of the front bracket of the two side brackets;

The rear cross support assembly includes two second connecting rods which are rotatably connected by a pivot to cross each other to form a cross-shaped structure. The upper end of each second connecting rod is rotatably connected to at least one of the sliding parts of the two side brackets, the lower end of the push handle connecting rod and the front end of the upper rod connecting rod, and the lower end of each second connecting rod is rotatably connected to the lower end of the upper rod of the two side brackets.

Preferably, the upper rod and the lower rod have the same extension direction, and the lower rod can be slidably connected to the upper rod along the extension direction of the upper rod.

More preferably, the lower rod can be inserted into the upper rod slidably along the extension direction of the upper rod.

Furthermore, the upper end portion of the lower rod is formed with an end plug inserted into the upper rod, the connecting rod assembly is connected to the end plug via a third pivot, and a sliding groove for sliding the third pivot is opened on the wall of the upper rod along its extension direction, and the third pivot can be slidably inserted into the sliding groove.

In combination with the above, the present invention adopts the above technical solution, which has the following advantages compared with the prior art:

The child stroller provided by the present invention has a rear support comprising an upper rod and a lower rod that can slide relatively to each other so as to be retractable, and the lower rod and the handlebar assembly are linked together through a connecting rod assembly. When the frame is folded, as the handlebar assembly moves, the lower rod slides upward relative to the upper rod under the action of the connecting rod assembly and moves closer, so that the overall length of the rear support after folding is reduced and no secondary folding is required, thereby reducing the volume of the folded child stroller and making it easy to fold.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

FIG1 is a perspective schematic diagram of the child stroller of Example 1 when unfolded;

FIG2 is a side view of the child stroller shown in FIG1 when unfolded;

Fig. 3 is a cross-sectional view of J in Fig. 2;

FIG4 is a side view of the child stroller shown in FIG1 during folding;

FIG5 is a cross-sectional view of a point K in FIG4 ;

FIG6 is a side view of the child stroller shown in FIG1 after being folded;

FIG7 is a cross-sectional view of a portion L in FIG6 ;

FIG8 is a bottom view of the child stroller shown in FIG1 in a folded state;

FIG9 is a side view of the child stroller of Embodiment 2 of the present invention when unfolded;

FIG10 is a partial enlarged view of the M portion in FIG9;

FIG11 is a side view of the child stroller shown in FIG9;

FIG12 is an inner side view of the side bracket of the stroller shown in FIG9;

FIG13 is a side view of the child stroller shown in FIG9 after being folded;

FIG14 is a side view of the child stroller of Embodiment 3 of the present invention when unfolded;

FIG15 is a partial enlarged view of the position N in FIG14;

FIG16 is a side view of the child stroller shown in FIG14;

FIG17 is an inner side view of the side bracket of the stroller shown in FIG14;

FIG. 18 is a side view of the child stroller shown in FIG. 14 after being folded.

Among them, 100, frame; 101, side bracket; 102, cross bracket; 200, front wheel assembly; 300, rear wheel assembly;

1. Push handle; 2. Rear bracket; 21. Upper rod; 211. Slide slot; 22. Lower rod; 221. End plug; 3. Driving connecting rod; 4. Upper rod connecting rod; 41. Sliding sleeve; 5. Lower rod connecting rod; 6. Front bracket; 7. Push handle upper connecting rod; 8. Seat rod; 91. First connecting rod; 92. Second connecting rod; 93. U-shaped piece;

31. Push handle; 32. Rear bracket; 321. Upper rod; 322. Lower rod; 33. Driving connecting rod; 34. Upper rod connecting rod; 341. Sliding sleeve; 35. Lower rod connecting rod; 36. Front bracket; 37. Push handle upper connecting rod; 38. Seat rod; 39. Handrail rod;

30. Push the lower connecting rod.

DETAILED DESCRIPTION

The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The directional terms mentioned in the present invention are defined based on the conventional viewing angle of the child stroller in the unfolded state in the art and for the convenience of description.

Example 1

FIG1-8 shows a child stroller of the present invention, comprising a frame 100 having an unfolded state and a folded state, a front wheel assembly 200 and a rear wheel assembly 300 arranged at the bottom of the frame 100, and the frame 100 comprises two or more side brackets 101 and a cross bracket 102 connected between the side brackets 101. In this embodiment, the number of the side brackets 101 is two and they are respectively located on the left and right sides of the child stroller. Each side bracket 101 comprises a push handle assembly and a rear bracket 2, and the rear bracket 2 comprises an upper rod 21 and a lower rod 22, and the upper rod 21 and the lower rod 22 are connected to each other in a relatively slidable manner, so that the rear bracket 2 can be extended and retracted. Each side bracket 101 also comprises a connecting rod assembly, which is used to drive the lower rod 22 to slide relative to the upper rod 21 when the push handle assembly is in motion, so that when the frame 100 is folded, the lower rod 22 and the push handle assembly are linked, and as the push handle assembly is pressed down, the lower rod 22 slides in the direction indicated by the arrow B in FIG2 under the action of the connecting rod assembly to get close to the upper rod 21. In this embodiment, the push handle assembly specifically includes a push handle 1 and a push handle upper connecting rod 7, and the upper end of the push handle upper connecting rod 7 is rotatably connected to the lower part of the push handle 1. When the frame 100 is in the unfolded state, the lower rod 22 is unfolded relative to the upper rod 21; and when the frame 100 is in the folded state, the upper end of the lower rod 22 and the upper end of the upper rod 21 are close to each other, and the lower end of the lower rod 22 and the lower end of the upper rod 21 are close to each other, and the rear bracket 2 is folded to reduce the volume of the frame 100 after folding. In other words, when the frame 100 is converted from the unfolded state to the folded state, the lower rod 22 slides along the extension direction of the upper rod 21, so that the overall length of the rear bracket 2 is shortened.

The above-mentioned side bracket can adopt a variety of structures, including but not limited to the structures shown in Figures 1-8. As shown in Figures 1-3, the connecting rod assembly of this embodiment specifically includes a driving connecting rod 3, an upper connecting rod 4 and a lower connecting rod 5. The driving connecting rod 3 is driven to flip by the push handle assembly during the folding process of the frame. The push handle 1 and the lower rod 22 of the push handle assembly are connected through the driving connecting rod 3 and the lower connecting rod 5 of the connecting rod assembly to achieve the linkage of the two. The driving connecting rod 3 generally extends in the up-down direction, and its upper end is rotatably connected to the lower end of the push handle 1 through the first pivot a1; the upper connecting rod 4 generally extends in the front-to-back direction, and its rear end is rotatably connected to the upper rod 21 through the second pivot a2; the lower connecting rod 5 generally extends in the front-to-back direction, and its rear end is rotatably connected to the lower rod 22 through the third pivot a3. The front end of the lower connecting rod 5 is rotatably and slidably connected to the upper connecting rod 4, and the lower end of the driving connecting rod 3 is rotatably connected to the upper connecting rod 4. Specifically, the connecting rod assembly also includes a sliding member slidably connected to the upper rod connecting rod 4, and the sliding member is specifically a sliding sleeve 41 slidably sleeved on the upper rod connecting rod 4. The lower end of the driving connecting rod 3 and the front end of the lower rod connecting rod 5 are both rotatably connected to the sliding sleeve 41 through the fourth pivot a4. As the push handle 1 is pressed down, the lower end of the driving connecting rod 3 flips upward, driving the sliding sleeve 41 and the lower rod connecting rod 5 to slide relative to the upper rod connecting rod 4 along the direction indicated by the arrow A in FIG. 2, and the lower rod 22 slides along the direction indicated by the arrow B in FIG. 2 under the action of the lower rod connecting rod 5 to get close to the upper rod 21, so as to achieve linkage contraction. When the frame 100 is in the unfolded state, the front end of the lower rod connecting rod 5 is connected to the first position of the upper rod connecting rod 4 (the position of the sliding sleeve 41); when the frame 100 is in the folded state, the front end of the lower rod connecting rod 5 is connected to the second position of the upper rod connecting rod 4, and the second position is located in front of the first position. That is to say, when folding, the sliding sleeve 41 moves close to the front end of the upper rod connecting rod 4.

The rear wheel assembly 300 is specifically arranged at the lower end of the lower rod 22 of the rear bracket 2. Each side bracket 101 also includes a front bracket 6 push handle upper connecting rod 7 and a seat rod 8. The front wheel assembly 200 is arranged at the lower end of the front bracket 6. The upper end of the push handle upper connecting rod 7 is rotatably connected to the push handle 1 through the fifth pivot a5, and the seat rod 8 is rotatably connected to the front bracket 6 through the sixth pivot a6. The driving connecting rod 3 is rotatably connected to the upper rod 21 through the seventh pivot a7, so that a four-bar linkage is formed between the push handle 1, the driving connecting rod 3, the upper rod 21 and the push handle upper connecting rod 7. The front part of the upper rod connecting rod 4 is rotatably connected to the rear end of the seat rod 8 through the eighth pivot a8. The upper end of the front bracket 6, the lower end of the push handle upper connecting rod 7 and the upper end of the upper rod 21 are connected to each other in a relative rotational manner or in a coaxial rotational manner; that is, the upper end of the front bracket 6, the lower end of the push handle upper connecting rod 7 and the upper end of the upper rod 21 are connected to each other in rotational manner through the same pivot, or the first and second components of the three components are connected to each other in rotational manner through a pivot and the third component is connected to the first component or the second component in rotational manner through another pivot. Specifically in this embodiment, the upper end of the front bracket 6 is connected to the upper end of the upper rod 21 in rotational manner through the ninth pivot a9, and the lower end of the push handle upper connecting rod 7 is connected to the upper end of the upper rod 21 in rotational manner through the tenth pivot a10.

The axis lines of the first pivot a1, the second pivot a2, the third pivot a3, the fourth pivot a4, the fifth pivot a5, the sixth pivot a6, the seventh pivot a7, the eighth pivot a8, the ninth pivot a9 and the tenth pivot a10 in each side bracket 101 are parallel to each other, and preferably extend horizontally along the left-right direction of the child stroller. The axis lines of the corresponding pivots of the two side brackets 101 overlap with each other, such as the axis lines of the first pivots a1 of the two side brackets 101 overlap with each other, the axis lines of the two second pivots a2 of the two side brackets 101 overlap with each other, and so on.

The upper rod 21 and the lower rod 22 have the same extension direction, and the lower rod 22 can be slidably connected to the upper rod 21 along the extension direction of the upper rod 21. Specifically in this embodiment, the lower rod 22 can be slidably inserted into the upper rod 21 along the extension direction of the upper rod 21. The upper end of the lower rod 22 is formed with an end plug 221 inserted in the upper rod 21, and the rear end of the lower rod connecting rod 5 is rotatably connected to the end plug 221 through the third pivot a3. A sliding groove 211 for sliding the third pivot a3 is provided on the wall of the upper rod 21 along its extension direction, and the third pivot a3 can be slidably penetrated in the sliding groove 211, thereby allowing the lower rod 22 to slide relative to the upper rod 21.

The cross support 102 can be unfolded and folded along the left and right directions of the stroller. In the present embodiment, the cross support 102 is mainly composed of a front cross support assembly for making the front supports 6 on both sides fold inwards and a rear cross support assembly for making the rear supports 2 on both sides fold inwards. Referring to Figure 1, the front cross support assembly includes two first connecting rods 91 that are rotatably connected by pivots to cross and form a cross-shaped structure, the upper end of each first connecting rod 91 is rotatably connected to the front end of the upper rod connecting rod 4 of the two side supports 101, and the lower end of each first connecting rod 91 is rotatably connected to the lower end of the front support 6 of the two side supports 101. It should be noted that if the upper end of the first connecting rod 91 is rotatably connected to one side support 101, the lower end of the first connecting rod 91 is rotatably connected to the other side support 101.

The rear cross brace assembly includes two second connecting rods 92 that are rotatably connected to each other through a pivot to form a cross-shaped structure, the upper end of each second connecting rod 92 is rotatably connected to the sliding members of the two side brackets 101, and the lower end of each second connecting rod 92 is rotatably connected to the lower end of the upper rod 21 of the two side brackets 101. It should be noted that if the upper end of the second connecting rod 92 is rotatably connected to one side bracket 101, the lower end of the second connecting rod 92 is rotatably connected to the other side bracket 101.

The first link 91 and the second link 92 are rotatably connected to the side bracket 101 through a U-shaped member 93. The U-shaped member 93 is rotatably connected to the side bracket 101 through a pivot, and the end of the first link 91 or the second link 92 is rotatably connected to the U-shaped member 93 through another pivot, and the axis lines of the two pivots on the same U-shaped member 93 intersect and are preferably perpendicular to each other. Specifically in this embodiment, the upper end of the first link 91 is rotatably connected to the front end of the upper rod link 4 through a U-shaped member 93; the lower end of the first link 91 is rotatably connected to the lower end of the front bracket 6 through a U-shaped member 93; the upper end of the second link 92 is rotatably connected to the sliding sleeve 41 through a U-shaped member 93; the lower end of the second link 92 is rotatably connected to the lower end of the upper rod 21 through a U-shaped member 93.

As shown in Figures 1-3, when the child stroller is unfolded, the frame 100 is in an unfolded state, the front cross brace assembly and the rear cross brace assembly of the cross bracket 102 are unfolded respectively, the two side brackets 101 are spaced apart from each other, the push handle, the front bracket 6, and the rear bracket 2 are relatively unfolded, and the lower rod 22 of the rear bracket 2 is extended relative to the lower rod 22.

As shown in Figures 4 and 5, when the frame 100 is folded, the push handle 1 is pressed downward, so that the lower end of the push handle 1 flips backward and downward, the driving link 3 flips and drives the sliding sleeve 41 to slide forward along the upper rod link 4, and the lower rod link 5 moves forward accordingly, thereby driving the lower rod 22 to slide into the upper rod 21. At the same time, the push handle 1 moves closer to the upper rod 21 of the rear bracket 2 under the action of the driving link 3, and the front bracket 6 moves closer to the upper rod 21 of the rear bracket 2 under the action of the upper rod link 4 and the seat rod 8; and as the sliding sleeve 41 slides, the rear cross brace assembly folds, and the front cross brace assembly also folds as the upper rod link 4 moves, so that the side brackets 101 on both sides are folded toward the middle. Until it is folded to the state shown in Figures 6-8, the frame 100 is folded and reaches the folded state, at which time the cross bracket 102 is folded so that the side brackets 101 on both sides are close together; the upper end of the push handle 1 of each side bracket 101, the lower end of the driving link 3 and the upper end of the upper rod 21, the front end of the upper rod link 4, and the rear end of the seat rod 8 are close to each other, the lower end of the push handle 1, the upper end of the driving link 3 and the lower end of the upper rod 21, and the lower end of the front bracket 6 are close to each other, the lower rod 22 of the rear bracket 2 is retracted into the upper rod 21, and the front wheel assemblies 200 on both sides are retracted between the rear wheel assemblies 300 on both sides.

The child stroller provided by the present invention has a rear support 2 comprising an upper rod 21 and a lower rod 22 which can slide relative to each other so as to be retractable, and the lower rod 22 and the push handle assembly are linked via a connecting rod assembly. When the frame 100 is folded, as the push handle 1 of the push handle assembly moves, the lower rod 22 slides upward and moves closer to the upper rod 21 under the action of the connecting rod assembly, so that the overall length of the rear support 2 after folding is reduced and no secondary folding is required, thereby reducing the volume of the folded child stroller and making it easy to fold.

Example 2

9-13 show another stroller of the present invention, which is different from the stroller in Embodiment 1 only in that the side bracket 101, the front wheel assembly 200, the rear wheel assembly 300 and the cross bracket 102 are the same as those in Embodiment 1.

As shown in FIGS. 9-13 , each side bracket 101 includes a push handle assembly, a rear bracket 32, a connecting rod assembly, a front bracket 36, a seat rod 38 and a handrail rod 39, wherein the rear bracket 32, the front bracket 36 and the seat rod 38 are the same as those in Embodiment 1. The push handle assembly includes a push handle 31 and a push handle upper connecting rod 37, the upper end of which is rotatably connected to the lower end of the push handle 31, and a locking mechanism is provided between the push handle 31 and the push handle upper connecting rod 37. The rear bracket 32 includes an upper rod 321 and a lower rod 322, the lower rod 322 being slidably inserted into the upper rod 321 along the extension direction of the upper rod 321. The upper end of the front bracket 36 and the lower end of the push handle upper connecting rod 37 are rotatably connected to the upper end of the upper rod 321, respectively. The seat rod 38 is rotatably connected to the front bracket 36, and the handrail rod 39 is rotatably connected to the push handle upper connecting rod 37. The connecting rod assembly includes a driving connecting rod 33, an upper connecting rod 34 and a lower connecting rod 35. The connecting rod assembly is basically the same as that of the first embodiment, except that the upper end of the driving connecting rod 33 is rotatably connected to the rear end of the handrail rod 39, and the driving connecting rod 33 is driven to flip by the push handle upper connecting rod 37 of the push handle 31 assembly through the handrail rod 39. The connecting rod assembly also includes a sliding sleeve 341 slidably sleeved on the upper connecting rod 34, and the lower end of the driving connecting rod 33 and the front end of the lower connecting rod 35 are both rotatably connected to the sliding sleeve 341.

When the stroller is folded, the lock between the push handle 31 and the push handle upper connecting rod 37 is released, and the push handle 31 is pressed downward, so that the lower end of the push handle 31 flips backward and downward, and the push handle upper connecting rod 37 rotates accordingly, so that the armrest rod 39 drives the driving connecting rod 33 to flip so that the sliding sleeve 341 slides forward along the upper rod connecting rod 34, and the lower rod connecting rod 35 moves forward accordingly, thereby driving the lower rod 322 to slide into the upper rod 321, and at the same time, the front bracket 36 moves closer to the upper rod 321 of the rear bracket 32 under the action of the upper rod connecting rod 34 and the seat rod 38. Until it is folded to the state shown in Figure 13, the upper end of the push handle 31 of each side bracket 101, the rear end of the handrail rod 39, the lower end of the driving link 33 and the upper end of the upper rod 321, the front end of the upper rod link 34, and the rear end of the seat rod 38 are close to each other, the lower end of the push handle 31, the upper end of the driving link 33 and the lower end of the upper rod 321, and the lower end of the front bracket 36 are close to each other, and the lower rod 322 of the rear bracket 32 is retracted into the upper rod 321.

Example 3

Figures 14-18 show another child stroller of the present invention, which is basically the same as Example 2, with the only difference that: the side bracket 101 also includes a push handle lower connecting rod 30, the upper end of the push handle lower connecting rod 30 is rotatably connected to the lower end of the push handle 31, and the lower end of the push handle lower connecting rod 30 is rotatably connected to the upper rod 321; in addition, the upper end of the push handle upper connecting rod 37 is rotatably connected to the lower part of the push handle 31, and the connection between the two is located above the connection between the push handle 31 and the push handle lower connecting rod 30, thereby forming a four-bar mechanism between the push handle 31, the push handle lower connecting rod 30, the upper rod 321 and the push handle upper connecting rod 37, and no locking mechanism as in Example 2 is set between the push handle 31 and the push handle upper connecting rod 37.

In this embodiment, when the vehicle frame is in the unfolded state, the extension direction of the push handle lower connecting rod 30 is preferably consistent with the extension direction of the driving connecting rod 33 .

It should also be noted that: in other embodiments, the push handle lower connecting rod 30 and the driving connecting rod 33 are the same rod, that is, the rod is rotatably arranged on the upper rod 321, and its upper end and lower end are rotatably connected to the lower end of the push handle 31 and the sliding sleeve 341 respectively, and the rear end of the handrail rod 39 is rotatably connected to the rod.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are preferred implementation methods. 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. All equivalent changes or modifications made according to the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The baby stroller comprises a frame with an unfolding state and a folding state, a front wheel assembly and a rear wheel assembly which are arranged at the bottom of the frame, wherein the frame comprises more than two side brackets and a transverse bracket connected between the side brackets; each side support includes pushing away handle subassembly and rear bracket, its characterized in that respectively:

The rear bracket comprises an upper rod and a lower rod, the upper rod and the lower rod can be connected in a relatively sliding manner, the extending directions of the upper rod and the lower rod are consistent, the lower rod can be connected with the upper rod in a sliding manner along the extending direction of the upper rod, and the rear wheel assembly is arranged at the lower end part of the lower rod;

each side bracket further comprises a connecting rod assembly for driving the lower rod to slide relative to the upper rod when the push handle assembly acts;

when the frame is converted from an unfolding state to a folding state, the lower rod slides along the extending direction of the upper rod, and the length of the rear bracket is shortened;

The connecting rod assembly includes:

A drive link driven to rotate by the push handle assembly during folding of the frame;

An upper rod link, the rear end of which is rotatably connected to the upper rod; and

A lower rod link having a rear end rotatably connected to the lower rod;

wherein the front end of the lower rod connecting rod is rotatably and slidably connected with the upper rod connecting rod, the lower end of the driving connecting rod is rotatably connected with the lower rod connecting rod, and when the frame is in a unfolding state, the front end of the lower rod connecting rod is connected with the first position of the upper rod connecting rod; when the frame is in a folded state, the front end portion of the lower rod link is connected to a second position of the upper rod link, the second position being located in front of the first position.

2. The stroller of claim 1, wherein the linkage assembly further comprises a slider slidably coupled to the upper rod link, the lower end of the drive link, the front end of the lower rod link, and the slider being rotatably coupled.

3. The stroller of claim 2, wherein the slide is a sliding sleeve slidably disposed over the upper rod link.

4. The stroller of claim 2, wherein the push handle assembly comprises a push handle and a push handle upper link having an upper end rotatably connected to a lower portion of the push handle, the upper end of the drive link being rotatably connected to a lower end of the push handle, the side brackets further comprising a front bracket having a lower end provided with the front wheel assembly and a seat bar rotatably connected to the front bracket; the upper end part of the front bracket, the lower end part of the upper connecting rod of the push handle and the upper end part of the upper rod are connected in a two-to-two rotary manner; the driving connecting rod is rotatably connected to the upper rod; the front part of the upper rod connecting rod is rotatably connected with the seat rod; when the frame is in a folded state, the lower end part of the front support, the lower end part of the lower rod and the lower end part of the pushing handle are mutually closed, and the upper end part of the front support, the upper end part of the upper rod and the upper end part of the pushing handle are mutually closed.

5. The stroller of claim 2, wherein: the push handle assembly comprises a push handle, a push handle upper connecting rod, a front support, a seat rod and a grab rod, wherein the upper end part of the push handle is rotatably connected to the lower part of the push handle, the front support is provided with the front wheel assembly at the lower end part of the side support, the seat rod is rotatably connected to the front support, and the grab rod is rotatably connected to the push handle upper connecting rod; the upper end part of the front bracket, the lower end part of the upper connecting rod of the push handle and the upper end part of the upper rod are connected in a two-to-two rotary manner; the driving connecting rod is rotatably connected to the upper rod, and the upper end part of the driving connecting rod is rotatably connected to the grab rail; the front part of the upper rod connecting rod is rotatably connected with the seat rod; when the frame is in a folded state, the lower end part of the front support, the lower end part of the lower rod and the lower end part of the pushing handle are mutually closed, and the upper end part of the front support, the upper end part of the upper rod and the upper end part of the pushing handle are mutually closed.

6. The stroller of claim 5, wherein: the side bracket further comprises a push handle lower connecting rod with an upper end part rotatably connected with the lower end part of the push handle, and the lower end part of the push handle lower connecting rod is rotatably connected with the upper rod.

7. The stroller of claim 6, wherein: when the frame is in the unfolding state, the center line of the push handle lower connecting rod and the center line of the driving connecting rod are mutually overlapped.

8. The stroller of any one of claims 4 to 7, wherein the cross support comprises a front cross support assembly and a rear cross support assembly;

The front cross support assembly comprises two first connecting rods which are connected in a rotating way through a pivot shaft to form a cross structure, the upper end parts of the first connecting rods are respectively and rotatably connected with the rear end parts of the seat rods of the two side brackets and/or the front end parts of the upper rod connecting rods, and the lower end parts of the first connecting rods are respectively and rotatably connected with the lower end parts of the front brackets of the two side brackets;

The rear cross brace assembly comprises two second connecting rods which are connected in a rotating way through a pivot shaft to form a cross structure, the upper end parts of the second connecting rods are respectively and rotatably connected with the front end parts of the sliding parts or the upper rod connecting rods of the two side brackets, and the lower end parts of the second connecting rods are respectively and rotatably connected with the lower end parts of the upper rods of the two side brackets.

9. The stroller of claim 1, wherein the lower rod is slidably inserted into the upper rod in the direction of extension of the upper rod.

10. The stroller of claim 9, wherein an end plug inserted into the upper rod is formed at an upper end portion of the lower rod, the link assembly is connected to the end plug through a third pivot, a sliding groove for sliding the third pivot is formed in a wall of the upper rod along an extending direction of the wall of the upper rod, and the third pivot is slidably inserted into the sliding groove.