CN108177679B - Child cart - Google Patents

Abstract

The invention discloses a baby stroller, wherein side brackets on each side of a stroller frame comprise a front bracket, a rear bracket and a push rod which are connected with each other in a rotating way, each side bracket further comprises a front connecting rod which extends along the front-back direction and is pivoted on the front bracket, an upper connecting rod which extends along the up-down direction and is pivoted on the push rod at the upper part, a rear connecting rod which is pivoted on the rear bracket and is pivoted on the front part and is pivoted on the rear part of the front connecting rod, and a seat rod assembly, wherein the seat rod assembly comprises a front seat rod which is pivoted on the upper part of the rear bracket and a rear seat rod which is arranged in a sliding way relative to the front seat rod, the rear part of the rear connecting rod, the rear part of the rear seat rod and the lower end part of the upper connecting rod are pivoted on one of the front connecting rod and the rear connecting rod or the rear connecting rod are pivoted on the same rotation center line. The trolley frame is simple in structure, simple and convenient to fold, and the folded trolley frame is flat and neat as a whole, small enough in size and convenient to transport and carry.

Description

stroller

Technical field

The invention relates to a children's stroller.

Background technique

Children's strollers play an important role in allowing users to carry infants and young children in their daily lives, and have now become one of the indispensable children's products in the growth process of children. In the existing technology, children's strollers have various structures, and the connection relationships between the rods are also different. The stroller's load-bearing stability, the way of installing the seat, the folding method and the folding principle of the frame are also different. The folded shapes and volumes are also different. How to make the child stroller have good load-bearing capacity, the structure of the rods is simpler, the folding operation is more convenient, and the volume after folding is smaller has always been a goal that people in this technical field continue to pursue.

Contents of the invention

The object of the present invention is to provide a children's stroller with a simple structure, convenient folding operation, and a small folded flat volume.

In order to achieve the above object, the technical solution adopted by the present invention is: a children's stroller, including a stroller frame with an unfolded state and a folded state, a front wheel assembly located at the bottom front of the stroller frame, and a The rear wheel assembly at the bottom of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state. The stroller frame includes two side wheels located on the left and right sides. The bracket and the cross brace assembly connected between the side brackets on both sides. The side brackets on each side include a front bracket, a rear bracket and a push rod respectively extending in the up and down direction. The upper part of the front bracket and the rear bracket Two of the three components, the upper part and the lower part of the push rod, are pivotally connected and the third component is pivotally connected to one of the aforementioned two components, or the three components are pivoted around the same center line of rotation rotated together,

The side brackets on each side also include a front link extending in the front-rear direction and a front portion pivotally connected to the front bracket, an upper link extending in an up-down direction and an upper portion pivotally connected to the push rod, a rear link pivotally connected to the rear bracket and with a front portion pivotally connected to a rear portion of the front link, and a seat post assembly, wherein the seat post assembly includes a rear link pivotally connected to the rear portion of the front link. The front seat post on the upper part of the rear bracket and the rear seat post slidably arranged relative to the front seat post, the rear part of the rear link, the rear part of the rear seat post and the lower end of the upper link The two are pivotally connected and the third party is pivotally connected to one of the aforementioned two, or the rear portion of the rear link, the rear portion of the rear seat post and the lower end of the upper link These three are connected rotationally around the same rotation center line.

Preferably, on the side brackets on each side, a four-link mechanism is formed between the front bracket, the rear bracket, the front link and the rear link, and a four-link mechanism is formed between the seat post assembly, the rear link and the rear bracket. Crank slider mechanism, when the stroller frame is folded, the rear seat rod slides backward relative to the front seat rod, and the push rod flips backward and is gathered at the rear side of the rear bracket.

Preferably, the front seat post on the seat post assembly is a sliding sleeve rod, and the front portion of the rear seat rod is slidably inserted into the sliding sleeve rod along the length extension direction of the sliding sleeve rod.

Preferably, the upper part of the front bracket is pivotally connected to the upper part of the rear bracket through a first axis, the lower part of the push rod is pivotally connected to the upper part of the rear bracket through a second axis, and the third The axis line of one shaft and the axis line of the second shaft extend parallel to or collinearly with each other; the lower part of the upper link is pivotally connected to the rear seat post through a third axis, and the rear part of the rear link The rear seat rod is pivotally connected to the rear seat rod through a fourth shaft, and the axis line of the third shaft and the axis line of the fourth shaft extend parallel to or co-linearly with each other.

Further, the rear bracket includes a rear support rod extending upwardly from the back to the front and a connecting rod fixed on the upper part of the rear support rod and extending upwardly from the front to the back. The upper part of the front bracket passes through the third One axis is pivotally connected to the lower part of the connecting rod, and the lower part of the push rod is pivotally connected to the upper part of the connecting rod through the second axis.

Furthermore, the front seat post in the seat post assembly is pivotally connected to the connecting rod through a fifth axis, and the fifth axis is located on the connecting rod between the first axis and the third axis. between the two axles, and the fifth axle is located at the position where the connecting rod and the rear support rod are connected.

Further, the rear link is pivotally connected to the rear bracket through a sixth axis, and the front part of the rear link and the rear part of the front link are pivotally connected through a seventh axis; The front part of the front link is pivotally connected to the front bracket through an eighth axis, and the eighth axis is located below the first axis on the front bracket; the upper part of the upper link is connected through a ninth axis. A shaft is pivotally connected to the push rod, and the ninth shaft is located above the second shaft on the push rod.

Preferably, the lower part of the front bracket on each side is provided with a set of the front wheel assemblies, the lower part of the rear bracket on each side is provided with a set of the rear wheel assemblies, and the front wheel assemblies on both sides are The left and right spacing between the rear wheel assemblies on both sides is greater than the left and right spacing between the rear wheel assemblies on both sides. When the front bracket and the rear bracket are retracted in the front and rear directions, the two sets of rear wheel assemblies are retracted in the left and right directions between the two groups. between the front wheel assemblies.

Preferably, the cross brace assembly is disposed between the side brackets on both sides so as to be foldable along the left and right directions, and the cross brace assembly includes a front brace assembly and/or a front brace assembly that can each be unfolded and retracted along the left and right directions. Rear stay assembly, wherein the front stay assembly is provided between the front brackets on both sides and the front portions of the front seat posts on both sides; between the bracket and the front of the rear link on either side.

Further, the rear support rod assembly is a rear cross support assembly, and the rear cross support assembly includes two rear support rods pivotally connected in the middle, and one end of each rear support rod is rotationally connected to a The lower part of the rear bracket on one side and the other end thereof are rotatably connected to the front part of the rear link on the other side, and the position where the rear support rod and the rear link are rotatably connected is on the rear link. The rod is located in front of the pivotal connection position between the front link and the rear link; the front strut assembly is a front cross brace assembly, and the front cross brace assembly includes two central rods that are pivotally connected to each other. Front struts, one end of each front strut is rotatably connected to the lower part of the front bracket on one side and the other end is rotatably connected to the front part of the front seat post on the other side, and the The position where the front support rod is pivotally connected to the front seat rod is located on the front seat rod in front of the position where the front seat rod is pivotally connected to the rear bracket.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the children's stroller of the present invention adopts a new structure and a folding principle of the stroller frame structure, so that the stroller frame can be in the unfolded state. It has a very simple structure and has good stability. The folding operation of the stroller frame is also very simple and convenient. The folded stroller frame is flat and neat, and is small enough for easy transportation and portability.

Description of the drawings

Figure 1 is a perspective view of the children's stroller of the present invention in an unfolded state;

Figure 2 is a second perspective view of the children's stroller in the unfolded state of the present invention;

Figure 3 is a side view of the children's stroller in the unfolded state of the present invention;

Figure 4 is a perspective view of the children's stroller of the present invention in a half-folded state;

Figure 5 is a second perspective view of the children's stroller of the present invention in a half-folded state;

Figure 6 is a side view of the children's stroller of the present invention in a half-folded state;

Figure 7 is a perspective view of the folded stroller of the present invention;

Figure 8 is a second perspective view of the folded stroller of the present invention;

Figure 9 is a side view of the children's stroller of the present invention in a folded state;

Among them: 100. Side bracket; 20. Front wheel assembly; 30. Rear wheel assembly; 1. Front bracket; 2. Rear bracket; 21. Rear strut; 22. Connecting rod; 3. Push rod; 4. Front connecting rod ; 5. Rear link; 6. Upper link; 7. Seat post assembly; 71. Front seat post; 72. Rear seat post; 8. Front stay assembly; 81. Front stay; 82. First connecting piece; 83. Second connecting piece; 9. Back support rod assembly; 91. Back support rod; 92. Third connecting piece; 93. Fourth connecting piece; 11. First axis; 12. Second axis; 13. Third axis; 14, the fourth axis; 15, the fifth axis; 16, the sixth axis; 17, the seventh axis; 18, the eighth axis; 19, the ninth axis.

Detailed ways

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

The following descriptions of directions are defined based on the front, rear, left, and right directions observed by the operator when the stroller is being pushed and used.

Referring to the children's stroller shown in Figures 1 to 9, it includes a stroller frame with an unfolded state and a folded state, a front wheel assembly 20 located at the front of the stroller frame, and a front wheel assembly 20 located at the rear of the stroller frame. The rear wheel assembly 30 at the bottom, and the locking mechanism for locking the stroller frame in the unfolded state. The stroller frame includes two side brackets 100 arranged on the left and right sides and connected between the side brackets 100 on both sides. cross brace components between.

Referring to Figures 1 to 3, the side bracket 100 on each side includes a front bracket 1, a rear bracket 2 and a push rod 3 respectively extending in the up and down direction. The upper part of the front bracket 1, the upper part of the rear bracket 2 and the push rod 3 Two of the three lower components are pivotally connected and the third component is pivotally connected to one of the two components, or the above three components are pivotally connected around the same center line of rotation.

The side bracket 100 on each side also includes a front link 4, a rear link 5, an upper link 6 and a seat post assembly 7. The front link 4 extends in the front and rear direction, and its front part is pivotally connected to the front bracket 1 ; The upper link 6 extends in the up and down direction and its upper part is pivotally connected to the push rod 3; the rear link 5 is pivotally connected to the rear bracket 2, and the rear link 5 has a front portion located on the front side of the rear bracket 2 and Located at the rear of the rear side of the rear bracket 2, the front part of the rear link 5 is pivotally connected to the rear part of the front link 4; the seat post assembly 7 includes a front seat post 71 pivotally connected to the upper part of the rear bracket 2 and an opposite front seat Two of the three rear seat posts 72, the lower part of the upper link 6, the rear part of the rear link 5 and the rear seat post 72 are pivotally connected and the third one is pivotally connected. Either one of the above two, or the lower part of the upper link 6, the rear part of the rear link 5 and the rear part of the rear seat post 72 are connected to rotate around the same rotation center line.

As shown in Figures 1 to 3, in this embodiment, the upper part of the front bracket 1 is pivotally connected to the upper part of the rear bracket 2 through the first axis 11, and the lower part of the push rod 3 is connected to the upper part of the rear bracket 2 through the second axis 12. The upper part is pivotally connected. The axis lines of the first shaft 11 and the second shaft 12 are parallel to each other and are respectively arranged on the front and rear sides of the rear bracket 2 . Here, specifically, the rear bracket 2 is in a T-shape, which includes a rear support rod 21 extending upwardly from the rear to the front and a connecting rod 22 fixed on the upper part of the rear support rod 21 and extending upwardly from the front to the rear. The upper part of the bracket 1 is pivotally connected to the lower end of the connecting rod 22 through the first shaft 11 , and the lower end of the push rod 3 is pivotally connected to the upper end of the connecting rod 22 through the second axis 12 . Of course, in some embodiments, the axis center lines of the first axis 11 and the second axis 12 can also be set to extend co-linearly.

As shown in Figures 1 to 3, in this embodiment, the lower part of the upper link 6 is pivotally connected to the rear portion of the rear seat post 72 through the third shaft 13, and the rear portion of the rear link 5 is connected to the rear seat post 72. The rear portions are pivotally connected through a fourth shaft 14, and the axis line of the third shaft 13 and the axis line of the fourth shaft 14 are arranged to extend co-linearly. Of course, in some embodiments, the axis centers of the third axis 13 and the fourth axis 14 can also be set to be parallel to each other.

Referring to Figures 1 to 3, in this embodiment, on the side bracket 100 on each side and the seat post assembly 7, the front seat post 71 adopts a sliding sleeve rod, and the front part of the rear seat post 72 is along the front seat post 71. The length extension direction is slidably inserted into the front seat post 71 so that the rear seat post 72 can telescope in the front and rear direction relative to the front seat post 71; the front seat post 71 is pivotally connected to the connecting rod 22 of the rear bracket 2 through the fifth shaft 15, which The fifth shaft 15 is located between the first shaft 11 and the second shaft 12 on the connecting rod 22 . Here, the fifth shaft 15 is located at the position where the connecting rod 22 and the rear support rod 21 meet.

In this embodiment, on the side bracket 100 on each side, the rear link 5 is pivotally connected to the rear bracket 2 through the sixth axis 16, and the front part of the rear link 5 and the rear part of the front link 4 pass through the seventh axis 16. The shaft 17 is pivotally connected; the front part of the front link 4 is pivotally connected to the front bracket 1 through an eighth shaft 18, which is located below the first shaft 11 on the front bracket 1; the upper link 6 The upper part is pivotally connected to the push rod 3 through a ninth axis 19, which is located above the second axis 12 on the push rod 3.

In this way, as shown in Figure 3, on the side bracket 100 on each side, a four-bar linkage is formed between the front bracket 1, the rear bracket 2, the front link 4 and the rear link 5. The seat post assembly 7, the rear link 5 and the rear bracket 2 form a crank slider mechanism. When the stroller frame is locked in the unfolded state, the front bracket 1, connecting rod 22, and push rod 3 extend roughly in the same length direction, and the front link 4, rear link 5, and upper link 6 are in contact with the front bracket 1, connecting rod 22 and the push rod 3 form a large stable triangular structure; between the seat post assembly 7, the push rod 3 and the upper link 6, and between the seat post assembly 7 and the rear link 5 and the rear bracket 2, a With a small triangular structure, the deployed side bracket 100 presents a very stable structure and has good load-bearing stability. When the stroller frame is folded, when the push rod 3 is flipped backward, the lower part of the upper link 6 is moved downward to drive the rear seat rod 72 to slide backward relative to the front seat rod 71, and at the same time, the seat rod assembly 7 is rotated relative to the rear bracket 2, thereby The above-mentioned rods in the slider-crank mechanism and the four-bar linkage are driven to move relative to each other, so that the rods in the side bracket 100 are gradually brought together, thereby realizing the folding of the side bracket 100 .

As shown in the accompanying drawings, the cross brace assembly connected between the side brackets 100 on both sides can be folded in the left-right direction and disposed between the side brackets 100 on both sides. The cross brace assembly includes a front brace component 8 and/or a rear brace component 9 that can be unfolded and folded in the left and right directions. The front brace component 8 is provided on the front brackets 1 on both sides and the front seat posts on both sides. 71, the rear support rod assembly 9 is provided between the rear brackets 2 on both sides and the front parts of the rear links 5 on both sides.

Specifically, as shown in FIGS. 1 and 2 , the front support rod assembly 8 is a front cross support assembly. The front cross support assembly includes two front support rods 81 pivotally connected in the middle. One end of the front support rod 81 The first connecting piece 82 is rotatably connected to the lower part of the front bracket 1 on one side, and its other end is rotatably connected to the front of the front seat post 71 on the other side through the second connecting piece 83. Here, the first connecting piece 82 Disposed at the eighth axis 18 , the second connecting member 83 is located in front of the fifth axis 15 in the lengthwise extension direction of the front seat post 71 .

The rear cross brace assembly 9 used here is a rear cross brace assembly. The rear cross brace assembly includes two rear brace bars 91 pivotally connected in the middle. One end of each rear brace bar 91 rotates through a third connecting piece 92 is connected to the front part of the rear link 5 on one side, and its other end is rotationally connected to the lower part of the rear bracket 2 on the other side through a fourth connecting piece 93. Here, the third connecting piece 92 is on the rear link 5. The fourth connecting member 93 is located in front of the seventh axis 17 in the length extension direction, and the fourth connecting member 93 is located below the sixth axis 16 on the rear bracket 2 .

Referring to the accompanying drawings, on the side supports 100 on each side, a set of front wheel assemblies 20 are provided at the lower part of the front support 1, and a set of rear wheel assemblies 30 are provided at the lower part of the rear support 2. When the stroller frame is unfolded, In this state, the left-right distance between the two sets of front wheel assemblies 20 is greater than the left-right distance between the rear wheel assemblies 30 on both sides. This arrangement can make the front wheel assembly 20 turn more flexibly during the pushing process of the cart frame, making the pushing operation more convenient and labor-saving. When the stroller frame is folded, the front bracket 1 and the rear bracket 2 are close together in the front-to-back direction, and the two sets of rear wheel assemblies 30 are gathered between the two sets of front wheel assemblies 20 in the left-right direction.

In this way, when the stroller frame is unfolded, as shown in Figures 1 to 3, the side brackets 100 on both sides are unfolded respectively, and the front strut assembly 8 and the rear strut assembly 9 are respectively unfolded in the left and right directions and supported on both sides in the transverse direction. between the side brackets 100 on both sides to provide support for the stroller frame in the left and right directions.

When it is necessary to fold the stroller frame, as shown in Figures 4 to 6, when pressing down the push rod 3, it flips backward relative to the rear bracket 2, causing the upper link 6 to move downward and drive the rear seat rod 72 relative to the front seat rod. 71 slides out backward, and the front seat post 71 flips backward around the fifth axis 15, causing the rear link 5 to flip backward around the sixth axis 16 relative to the rear bracket 2, and the rear part of the front link 4 moves upward accordingly and drives the front The bracket 1 and the rear bracket 2 are gradually folded together in the front and rear direction, so that the front bracket 1 and the push rod 3 are folded in the front and rear sides of the rear bracket 2 respectively. During the process of relative rotation and folding of the rods on the side brackets 100 on both sides, the two front struts 81 of the front strut assembly 8 rotate and fold relative to each other, and the two rear struts 91 of the rear strut assembly 9 rotate relative to each other. Fold, so that the side brackets 100 on both sides are gradually folded in the left and right directions.

Finally, each rod member of each side bracket 100 is rotated and folded respectively, and the side brackets 100 on both sides are folded in the left and right directions, and the two rear wheel assemblies 30 are folded between the two front wheel assemblies 20, forming a configuration as shown in Figures 7 to 9 The structure shown in the figure shows that the folded cart frame is very flat and compact, and can also stand on the ground, reducing the occupied space and making it easy to transport and carry.

The above embodiments are only for illustrating the technical concepts and characteristics of the present invention. Their purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly. They cannot limit the scope of protection of the present invention. All equivalent changes or modifications made based on the spirit and essence of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a children's shallow, includes has the shallow frame of expansion state and folding state, locates the front wheel subassembly at shallow frame bottom front portion, locates the rear wheel subassembly at shallow frame bottom rear portion, and be used for with the shallow frame lock in the locking mechanical system of expansion state, shallow frame including divide locate left and right sides two side support and connect the both sides the stull subassembly between the side support, each side the side support all includes front bracket, rear bracket and the push rod that extend along the upper and lower direction respectively, two parts pivot connection in these three parts of upper portion of front bracket, rear bracket's upper portion and push rod's lower part and the pivot connection of third part are in one of these two parts, perhaps three parts rotationally link together around same rotation center line, its characterized in that:

the side brackets of each side further comprise a front connecting rod extending along the front-back direction and with the front part pivoted on the front bracket, an upper connecting rod extending along the up-down direction and with the upper part pivoted on the push rod, a rear connecting rod pivoted on the rear bracket and with the front part pivoted with the rear part of the front connecting rod, and a seat rod assembly, wherein the seat rod assembly comprises a front seat rod pivoted on the upper part of the rear bracket and a rear seat rod slidingly arranged relative to the front seat rod, and two of the rear part of the rear connecting rod, the rear part of the rear seat rod and the lower end part of the upper connecting rod are pivoted and the third part is pivoted on one of the two, or the rear part of the rear connecting rod, the rear part of the rear seat rod and the lower end part of the upper connecting rod are rotationally connected around the same rotation center line.

2. The stroller of claim 1, wherein: on the side support of every side, constitute four link mechanism between fore-stock, rear bracket, preceding connecting rod and the rear link, constitute slider-crank mechanism between seat pole subassembly, rear link and the rear bracket, when the shallow frame is folding, the rear seat pole is relative the fore-stock pole slides backward, just the push rod is overturned backward and draws in the rear side of rear bracket.

3. The stroller of claim 1, wherein: the front seat rod on the seat rod assembly is a sliding sleeve rod, and the front part of the rear seat rod is inserted into the sliding sleeve rod in a sliding manner along the length extending direction of the sliding sleeve rod.

4. The stroller of claim 1, wherein: the upper part of the front support is pivotally connected with the upper part of the rear support through a first shaft, the lower part of the push rod is pivotally connected with the upper part of the rear support through a second shaft, and the axial lead of the first shaft and the axial lead of the second shaft are mutually parallel or collinearly extended; the lower part of the upper connecting rod is connected to the rear seat rod through a third shaft, the rear part of the rear connecting rod is connected with the rear seat rod through a fourth shaft, and the axial lead of the third shaft and the axial lead of the fourth shaft are parallel or collinear to extend.

5. The stroller of claim 4, wherein: the rear support comprises a rear support rod extending from back to front in an upward-inclining manner and a connecting rod fixedly arranged on the upper portion of the rear support rod and extending from front to back in an upward-inclining manner, the upper portion of the front support is connected to the lower portion of the connecting rod through a first shaft pivot, and the lower portion of the push rod is connected to the upper portion of the connecting rod through a second shaft pivot.

6. The stroller of claim 5, wherein: the front seat rod in the seat rod assembly is pivotally connected to the connecting rod through a fifth shaft, the fifth shaft is located between the first shaft and the second shaft on the connecting rod, and the fifth shaft is located at a position where the connecting rod is connected with the rear supporting rod.

7. The stroller of claim 4, wherein: the rear connecting rod is pivotally connected to the rear bracket through a sixth shaft, and the front part of the rear connecting rod is pivotally connected with the rear part of the front connecting rod through a seventh shaft; the front part of the front connecting rod is pivotally connected to the front bracket through an eighth shaft, and the eighth shaft is positioned below the first shaft on the front bracket; the upper part of the upper connecting rod is pivotally connected to the push rod through a ninth shaft, and the ninth shaft is positioned above the second shaft on the push rod.

8. The stroller of claim 1, wherein: the lower part of each side of the front support is provided with a group of front wheel components, the lower part of each side of the rear support is provided with a group of rear wheel components, the left-right spacing between the front wheel components is larger than the left-right spacing between the rear wheel components, and when the front support and the rear support are folded along the front-rear direction, the two groups of rear wheel components are folded along the left-right direction between the two groups of front wheel components.

9. A stroller according to any one of claims 1 to 8, wherein: the transverse support assembly can be arranged between the side brackets on the two sides in a folding manner along the left-right direction, and comprises front support rod assemblies and/or rear support rod assemblies which can be respectively unfolded and folded along the left-right direction, wherein the front support rod assemblies are arranged between the front brackets on the two sides and the front parts of the front seat rods on the two sides, and the rear support rod assemblies are arranged between the rear brackets on the two sides and the front parts of the rear connecting rods on the two sides.

10. The stroller of claim 9, wherein: the rear cross brace assembly comprises two rear brace rods with the middle part connected in a pivot way, one end part of each rear brace rod is rotationally connected to the lower part of one side of the rear bracket, the other end part of each rear brace rod is rotationally connected to the front part of the other side of the rear connecting rod, and the position where the rear brace rod is rotationally connected with the rear connecting rod is positioned in front of the position where the front connecting rod is connected with the rear connecting rod in a pivot way on the rear connecting rod; the front cross brace assembly comprises two front brace rods with the middle part connected in a pivot mode, one end portion of each front brace rod is rotationally connected to the lower portion of the front support on one side, the other end portion of each front brace rod is rotationally connected to the front portion of the front seat rod on the other side, and the position, where the front brace rod is rotationally connected with the front seat rod, of the front seat rod is located in front of the position, where the front seat rod is connected with the rear support in a pivot mode, of the front seat rod.