WO2024179576A1 - Baby carriage - Google Patents

Abstract

Disclosed is a baby carriage. A frame of the baby carriage comprises a bottom frame (1), a lower support (3), an upper support (4), and a front support (2). A lower portion of the lower support is rotatably connected to a rear portion of the bottom frame, the upper support is rotatably connected to the lower support, a lower portion of the front support is rotatably connected to a front portion of the bottom frame, and an upper portion of the front support is rotatably connected to the upper support. In the process of converting the frame from an unfolded state to a folded state, the front support is overturned in the direction close to the bottom frame, and the lower support and the upper support are turned over relative to each other and folded between the front support and the bottom frame. The frame has a large riding space in the unfolded state, enabling the riding comfort of children to be improved. When the frame is folded, the front support is overturned backwards to be folded above the bottom frame, and the lower support and the upper support are turned over relative to each other and stackedly folded between the front support and the bottom frame, which significantly reduces the size of the baby carriage and provides convenience for daily storage, carrying, etc., by a user.

Description

Baby stroller

This application claims priority to Chinese patent application No. CN 202310186502.7 filed on March 1, 2023, the contents of which are incorporated by reference into this application.

Technical Field

The present invention relates to the field of children's products, in particular to a baby carriage.

Background Art

Strollers bring great convenience to children's travel and have become one of the indispensable children's products for families with children. Existing strollers have various structures, but most of them are relatively complex and have limited riding space, which affects the riding experience. Some strollers with larger riding space are still large in size after folding, which affects daily carrying and storage.

Summary of the invention

The object of the present invention is to provide a baby carriage with a new structure to solve one or more problems of the prior art.

To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a baby carriage, comprising a frame with an unfolded state and a folded state, a front wheel assembly and a rear wheel assembly arranged at the bottom of the frame, the frame comprising a bottom frame, a lower bracket, an upper bracket and a front bracket, the lower portion of the lower bracket is rotatably connected to the rear portion of the bottom frame, the upper bracket is rotatably connected to the lower bracket, the lower portion of the front bracket is rotatably connected to the front portion of the bottom frame, and the upper portion of the front bracket is rotatably connected to the upper bracket, and during the process of the frame being converted from the unfolded state to the folded state, the front bracket flips in a direction to approach the bottom frame, and the lower bracket and the upper bracket are relatively folded and folded between the front bracket and the bottom frame.

Preferably, the bottom frame includes a pair of bottom support rods respectively arranged on the left and right sides and arranged oppositely; the lower bracket includes a pair of lower support rods respectively arranged on the left and right sides and arranged oppositely; the upper bracket includes a pair of upper support rods respectively arranged on the left and right sides and arranged oppositely; the front bracket includes a pair of front support rods respectively arranged on the left and right sides and arranged oppositely;

A pair of frame structures are arranged along the left and right directions of the baby carriage, each of the frame structures includes the lower support rod, the bottom support rod, the front support rod and the upper support rod, wherein the lower support rod is rotatably connected to the bottom support rod, and the lower part of the front support rod is rotatably connected to the bottom support rod; the upper support rod is rotatably connected to the upper part of the front support rod, and the lower part of the upper support rod is rotatably connected to the lower support rod; the frame also has a supporting structure supported between the pair of frame structures, and the supporting structure can be folded to make the pair of frame structures move closer to each other.

In some embodiments, the frame also has a flip linkage mechanism arranged between a pair of the frame-type structures, the flip linkage mechanism is rotatably connected to the lower support rod in one of the frame-type structures, and the flip linkage mechanism is simultaneously rotatably connected to a component other than the lower support rod in the other frame-type structure; in the process of the lower support rod flipping toward the base frame, the lower support rod drives the flip linkage mechanism to move, and pulls the two frame-type structures toward each other through the flip linkage mechanism.

In some embodiments, the flip linkage mechanism includes a first support assembly arranged between the lower support rods on both sides and the bottom support rods on both sides, the first support assembly includes two first support rods that cross each other and are rotatably connected to each other at the intersection, one end of the first support rod is rotatably connected to the bottom support rod in the frame structure, the other end of the first support rod is rotatably connected to the lower support rod in the frame structure on the other side, and in the vertical direction, the connection position between the first support rod and the lower support rod is located on the lower side of the connection position between the lower support rod and the bottom support rod.

In some embodiments, the flip linkage mechanism also includes a second support assembly arranged between the lower support rods on both sides and the bottom support rods on both sides, the second support assembly includes two second support rods that cross each other and are rotatably connected at the intersection, one end of the second support rod is rotatably connected to the upper support rod in the frame structure, and the other end of the second support rod is rotatably connected to the lower support rod in the other frame structure.

In some embodiments, the lower support rod includes a main rod section and a connecting rod section fixedly arranged on the main rod section, wherein, when the frame is in the unfolded state, the lower part of the connecting rod section extends downward from the main rod section, the lower part of the main rod section is rotatably connected to the bottom support rod, and the first support rod is rotatably connected to the lower part of the connecting rod section.

In some embodiments, when the frame is in the unfolded state, the upper portion of the connecting rod segment extends rearwardly out of the main rod segment in the front-to-back direction, and the lower portion of the second support rod is rotationally connected to the upper portion of the connecting rod segment; the lower portion of the connecting rod segment extends forwardly out of the main rod segment in the front-to-back direction.

In some embodiments, the lower portion of the connecting rod segment is rotatably connected to the first strut via a first adapter, and the upper portion of the connecting rod segment is rotatably connected to the second strut via a second adapter;

The first adapter is rotated on the inner side of the connecting rod section via a first rotating shaft, and the first rotating shaft is extended in the left-right direction; the first support rod is rotated on the first adapter via a second rotating shaft, and the extension direction of the second rotating shaft is perpendicular to the extension direction of the first rotating shaft;

The second adapter is rotated on the inner side of the connecting rod section via a third rotating shaft, the third rotating shaft is extended in the left-right direction, the second support rod is rotated on the second adapter via a fourth rotating shaft, and the extension direction of the fourth rotating shaft is perpendicular to the extension direction of the third rotating shaft.

In some embodiments, the support structure includes a front cross brace disposed between a pair of bottom support rods, the front cross brace includes two cross bars that can be flipped relative to each other, the two cross bars are rotatably mounted on the pair of bottom support rods, and the two cross bars are rotatably connected to each other;

And/or, the support structure includes a rear cross brace arranged between a pair of bottom support rods, the rear cross brace has a telescopic rod structure, and the rear cross brace includes an outer rod and an inner rod that are relatively slidably telescopically connected.

In some embodiments, when the frame is in the unfolded state, the two cross bars extend in the same direction; when the frame is in the folded state, the two cross bars extend in the front-to-back direction and are gathered between the bottom support bars on both sides. The frame also includes a linkage assembly, which includes two linkage rods, which extend in the front-to-back direction. The two first support rods are rotatably connected at the intersection through a first axis, the front part of the linkage rod is rotatably connected to the cross bar, and the rear part of the linkage rod is rotatably connected to one of the first support rods and is located behind the first axis.

In some embodiments, the upper support rod has an upper support rod body, and the lower part of the upper support rod body is rotatably connected to the lower support rod; during the process of the frame converting from the unfolded state to the folded state, the lower support rod rotates and folds toward the direction of approaching the bottom support rod, and drives the upper support rod body to fold between the lower support rod and the front support rod.

In some embodiments, the frame further includes a handlebar frame, which includes two handlebar rods disposed on the left and right sides, one end of the two handlebar rods being rotatably connected to each other, and the other end of the two handlebar rods being rotatably connected to the upper part of the upper support rod on the side.

Among them, the upper support rod also includes an extension rod body extending forward from the upper part of the upper support rod body, the front part of the extension rod body is rotatably connected to the upper part of the front support rod, and the push handle rod is rotatably connected to the upper part of the upper support rod body or the rear part of the extension rod body. When the frame is in a folded state, the push handle frame is folded in the left and right direction and retracted with the extension rod body.

Preferably, when the frame is in the unfolded state, the base frame extends horizontally in the front-to-back direction, the lower bracket, the upper bracket and the front bracket each extend in the up-down direction, the front wheel assembly is arranged at the bottom front part of the base frame, and the rear wheel assembly is arranged at the bottom rear part of the base frame.

Due to the application of the above technical solution, the present invention provides a new structure of a baby carriage, whose frame has a larger seating space when unfolded, which can improve the comfort of children riding in the carriage, and whose frame can be folded to reduce the size, providing convenience for users' daily storage and carrying.

 

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the three-dimensional structure of a baby carriage in an unfolded state according to a specific embodiment of the present invention;

Figure 2 is a side view of the baby carriage of Figure 1;

Figure 3 is a front view of the baby carriage of Figure 1;

Figure 4 is a schematic diagram of the rotation center lines of the baby carriage of Figure 1;

FIG5 is a schematic diagram of the exploded structure of the frame of the baby carriage of FIG1 ;

Figure 6 is a schematic diagram of the connection between the upper support rod and the lower support rod in the baby carriage of Figure 1;

Figure 7 is a schematic diagram of the exploded structure of the upper support rod and the lower support rod of Figure 6;

Figure 8 is a schematic diagram of the connection structure of the second support rod assembly in the baby carriage of Figure 1;

FIG9 is a schematic diagram of the connection structure of the first support rod assembly in the baby carriage of FIG1 , wherein the first support rod assembly is unfolded in the left-right direction;

Figure 10 is a schematic diagram of the first support rod assembly in Figure 9 after being folded in the left-right direction;

Figure 11 is a schematic diagram of the three-dimensional structure of the baby carriage of Figure 1 during the folding process;

Figure 12 is a schematic diagram of the structure of the baby carriage of Figure 11 from above;

Figure 13 is a schematic side view of the baby carriage of Figure 11;

Figure 14 is a schematic diagram of the three-dimensional structure of the baby carriage in Figure 1 in a folded state;

Figure 15 is a schematic diagram of the structure of the baby carriage of Figure 14 from above;

Figure 16 is a schematic side view of the baby carriage of Figure 14;

Among them: 1, bottom frame; 11, bottom support rod; 12, front cross brace; 121, cross rod; 122, third axis; 13, rear cross brace; 13a, outer rod; 13b, inner rod;

2. front bracket; 21. front support rod;

3. Lower bracket; 31. Lower support rod; 31a. Main rod section; 31b. Connecting rod section;

4. upper bracket; 41. upper support rod; 41a. upper support rod body; 41b. extension rod body;

5. Push handle frame; 51. Push handle rod;

6. First support assembly; 61. First support rod; 62. First adapter; 621. First rotating shaft; 622. Second rotating shaft; 623. First adapter connecting plate; 624. First adapter supporting plate;

63, third adapter; 631, eighth rotating shaft; 632, third adapter connecting plate; 633, third adapter supporting plate; 60, first shaft;

7. Second supporting assembly; 71. Second support rod; 72. Second adapter; 721. Third rotating shaft; 722. Fourth rotating shaft; 723. Second adapter connecting plate; 724. Second adapter supporting plate;

73, fourth adapter; 731, sixth rotating shaft; 732, fourth adapter connecting plate; 733, fourth adapter supporting plate; 70, second shaft;

8. Front wheel assembly; 9. Rear wheel assembly; 10. Linkage rod; 101. Fourth axis; 102. Fifth axis.

DETAILED DESCRIPTION

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

The following descriptions of directions such as front, back, left, right, up, down, etc. are all defined with reference to the directions observed by the pusher when the frame of the stroller is in the unfolded state, and are only intended to illustrate the relative positional relationship of the various components of the stroller.

Referring to a baby carriage shown in FIGS. 1 to 16 , the baby carriage comprises a frame having an unfolded state and a folded state, a front wheel assembly 8 and a rear wheel assembly 9 arranged at the bottom of the frame, the frame comprising a bottom frame 1, a front bracket 2, a lower bracket 3, an upper bracket 4 and a handlebar frame 5. When the frame is in the unfolded state, the bottom frame 1 extends in the front-to-back direction, preferably horizontally in the front-to-back direction; the front bracket 2, the lower bracket 3, the upper bracket 4 and the handlebar frame 5 extend in the up-down direction respectively, the front wheel assembly 8 is arranged at the front of the bottom frame 1, and the rear wheel assembly 9 is arranged at the front of the bottom frame 1. It is arranged at the rear of the chassis 1, wherein the lower part of the front bracket 2 is rotatably connected to the front part of the chassis 1 around the first rotation center line X1, the lower part of the lower bracket 3 is rotatably connected to the rear part of the chassis 1 around the second rotation center line X2, the upper part of the lower bracket 3 is rotatably connected to the lower part of the upper bracket 4 around the third rotation center line X3, the upper part of the front bracket 2 is rotatably connected to the upper part of the upper bracket 4 around the fourth rotation center line X4; the lower part of the push handle frame 5 is rotatably connected to the upper part of the upper bracket 4 around the fifth rotation center line X5. The first rotation center line X1, the second rotation center line X2, the third rotation center line X3, the fourth rotation center line X4 and the fifth rotation center line X5 are parallel to each other and extend in the left-right direction.

When the frame is folded, the handle frame 5 is turned over and folded relative to the upper frame 4, the front frame 2 is turned over and folded backward relative to the bottom frame 1, and the lower frame 3 and the upper frame 4 are turned over and folded in the up and down direction and stacked between the front frame 2 and the bottom frame 1, so that the entire frame is folded.

Specifically, as shown in the drawings, the bottom frame 1 includes a pair of bottom support rods 11 arranged on the left and right sides and extending in the front-to-back direction, and each group of bottom support rods 11 is provided with a front wheel assembly 8 at the front and a rear wheel assembly 9 at the rear; the front frame 2 includes a pair of front support rods 21 arranged on the left and right sides and extending in the up-down direction; the lower frame 3 includes a pair of lower support rods 31 arranged on the left and right sides and extending in the up-down direction; the upper frame 4 includes a pair of upper support rods 41 arranged on the left and right sides and extending in the up-down direction, and the push handle frame 5 includes a pair of push handle rods 51 arranged on the left and right sides. A frame structure is formed on the left and right directions of the baby carriage, and each frame structure includes the above-mentioned lower support rods 31, bottom support rods 11, front support rods 21 and upper support rods 41.

Specifically, on the left and right sides of the baby carriage, the lower part of the lower support rod 31 is connected to the rear part of the bottom support rod 11, the lower part of the front support rod 21 is rotatably connected to the front part of the bottom support rod 11, the upper part of the upper support rod 41 is rotatably connected to the upper part of the front support rod 21, the lower part of the upper support rod 41 is rotatably connected to the upper part of the lower support rod 31, and the lower part of the push handle rod 51 is rotatably connected to the upper part of the upper support rod 41.

On the left and right sides of the baby carriage, the lower support rod 31 has at least one main rod section 31a extending in the up-down direction, and the upper support rod 41 includes an upper support rod body 41a extending in the up-down direction and an extension rod body 41b extending forward from the upper end of the upper support rod body 41a, so that the upper support rod 41 is in a "7" shape as a whole. The lower end of the main rod section 31a of the lower support rod 31 is rotatably connected to the bottom support rod 11, the upper end of the main rod section 31a is rotatably connected to the lower part of the upper support rod body 41a, the front part of the extension rod body 41b is rotatably connected to the upper part of the front support rod 21, and the lower part of the push handle rod 51 is rotatably connected to the rear part of the extension rod body 41b or rotatably connected to the upper part of the upper support rod body 41a, and the lower part of the push handle rod 51 is connected to the position where the rear part of the extension rod body 41b and the upper part of the upper support rod body 41a are connected. When the frame is in the unfolded state, on the left and right sides of the frame, the front support rod 21, the bottom support rod 11, the main rod section 31a, and the upper support rod 41 are circumferentially arranged to form a closed frame structure for forming a barrier on both sides of the child's body, and the push handle frame 5 is located above the above-mentioned frame structure.

The frame can be folded in the left-right direction, wherein the push handle frame 5 can be folded in the left-right direction, specifically, each push handle rod 51 is in a 7-shape, and the push handle frame 5 is in a U-shape with the opening facing downward. The upper ends of the two push handle rods 51 are adjacent and rotatably connected, and the upper ends of the two push handle rods 51 are rotatably connected around the sixth rotation center line X6. When the frame is in the unfolded state, the sixth rotation center line X6 extends in the up-down direction, and the projection of the sixth rotation center line X6 on the horizontal plane passing through the first rotation center line X1 is perpendicular to the first rotation center line X1.

The frame also includes a supporting structure supported between the pair of frame structures, and the supporting structure can be folded to allow the pair of frame structures to move toward each other.

The frame also has a flip linkage mechanism arranged between a pair of frame structures, which is rotatably connected to the lower support rod 31 in one of the frame structures, and is also rotatably connected to components other than the lower support rod 31 in the other frame structure. When the lower support rod 31 flips and retracts toward the base frame 1, the lower support rod 31 drives the flip linkage mechanism to move, and pulls the two frame structures toward each other through the flip linkage mechanism.

Specifically in this embodiment, the flip linkage mechanism includes a first support assembly 6 disposed between the lower support rods 31 on both sides and the bottom support rods 11 on both sides, and a second support assembly 7 disposed between the upper support rods 41 on both sides and the lower support rods 31 on both sides. During the folding process of the frame, the lower bracket 3 can be rotated and folded relative to the bottom frame 1 so that the first support assembly 6 and the second support assembly 7 can be folded in the left and right directions at the same time.

In this embodiment, the first support assembly 6 and the second support assembly 7 are both cross support assemblies. Specifically, referring to FIG5, FIG9, and FIG10, the first support assembly 6 includes two first support rods 61 that cross each other and are connected to rotate around a first axis 60 at the intersection. The first support rods 61 extend in the front-to-back direction. The two first support rods 61 are connected in the following manner: the front part of the first support rod 61 is connected to the front part of the bottom support rod 11 on one side through the third adapter 63, and the rear part of the first support rod 61 is connected to the lower part of the lower support rod 31 on the other side through the first adapter 62; see FIG3, FIG5 As shown in FIG8 , the second support assembly 7 includes two second support rods 71 that cross each other and are connected to rotate around a second axis 70 at the intersection. The second support rods 71 extend in the up-down direction. The two second support rods 71 are connected in the following manner: the upper portion of the second support rod 71 is connected to the upper portion of the upper support rod 41 on one side, specifically to the upper portion of the upper support rod body 41a, through a fourth adapter 73, and the lower portion of the second support rod 71 is connected to the upper portion of the lower support rod 31 on the other side through a second adapter 72. Here, the lower support rod 31 also includes a connecting rod segment 31b fixedly arranged on the inner side of the main rod segment 31a, the upper portion of the connecting rod segment 31b is higher than the main rod segment 31a and the lower portion thereof is lower than the main rod segment 31a. The lower part of the second support rod 71 is connected to the upper part of the connecting rod section 31b through the second adapter 72, and the rear part of the first support rod 61 is connected to the lower part of the connecting rod section 31b through the first adapter 62. When the frame is in the unfolded state, the first adapter 62 is located below the main rod section 31a, and the second adapter 72 is located above the main rod section 31a.

The first adapter 62 is rotated on the inner side of the connecting rod section 31b via a first rotating shaft 621, and the first rotating shaft 621 is extended in the left-right direction; the first support rod 61 is rotated on the first adapter 62 via a second rotating shaft 622, and the extension direction of the second rotating shaft 62 is perpendicular to the extension direction of the first rotating shaft 621.

The first adapter 62 is an overall U-shaped structure, and includes a first adapter connecting plate 621 fixed on the connecting rod segment 31b and a first adapter support plate 624 arranged on the side of the first adapter connecting plate 623 away from the connecting rod segment 31b, two first adapter support plates 624 are provided and are arranged opposite to the first adapter connecting plate 623, and the first support rod 61 is rotatably installed between the two first adapter support plates 624.

The first rotating shaft 621 is extended along a direction perpendicular to the first adapter connecting plate 623 , and the second rotating shaft 622 is extended along a direction perpendicular to the adapter supporting plate 624 .

The second adapter 72 is rotated on the inner side of the connecting rod section 31b via the third rotating shaft 721, and the third rotating shaft 721 is extended in the left-right direction. The second support rod 71 is rotated on the second adapter 72 via the fourth rotating shaft 722, and the extension direction of the fourth rotating shaft 722 is perpendicular to the extension direction of the third rotating shaft 721.

The second adapter 72 is an overall U-shaped structure, and includes a second adapter connecting plate 723 fixed on the connecting rod segment 31b and a second adapter support plate 724 arranged on the side of the second adapter connecting plate 723 away from the connecting rod segment 31b, two second adapter support plates 724 are provided and are arranged opposite to the second adapter connecting plate 723, and the second support rod 71 is rotatably installed between the two second adapter support plates 724.

The third rotating shaft 721 is extended along a direction perpendicular to the second adapter connecting plate 723 , and the fourth rotating shaft 722 is extended along a direction perpendicular to the second adapter supporting plate 724 .

The fourth adapter 73 is rotated on the inner side of the upper support rod 41 through a fifth rotating shaft (not shown in the figure), and the fifth rotating shaft is extended in the left-right direction. The second support rod 71 is rotated on the fourth adapter 73 through a sixth rotating shaft 731, and the extension direction of the sixth rotating shaft 731 is perpendicular to the extension direction of the fifth rotating shaft.

The fourth adapter 73 has an overall U-shaped structure and includes a fourth adapter connecting plate 723 fixed to the upper support rod 41 and a fourth adapter support plate 724 arranged on the side of the fourth adapter connecting plate 723 away from the upper support rod 41, and two fourth adapter support plates 724 are provided and are arranged relative to the fourth adapter connecting plate 723, and the second support rod 71 is rotatably installed between the two fourth adapter support plates 724.

The fifth rotating shaft is extended along a direction perpendicular to the fourth adapter connecting plate 723 , and the sixth rotating shaft 731 is extended along a direction perpendicular to the fourth adapter supporting plate 724 .

The third adapter 63 is rotated on the inner side of the bottom support rod 11 through a seventh rotation axis (not shown in the figure), and the seventh rotation axis is extended in the left-right direction; the first support rod 61 is rotated on the third adapter 63 through an eighth rotation axis 631, and the extension direction of the eighth rotation axis 631 is perpendicular to the extension direction of the seventh rotation axis.

The third adapter 63 has an overall U-shaped structure and includes a third adapter connecting plate 632 fixed on the bottom support rod 11 and a third adapter supporting plate 633 arranged on the side of the third adapter connecting plate 622 away from the bottom support rod 11, and two third adapter supporting plates 633 are provided and are arranged opposite to the third adapter connecting plate 632, and the first support rod 61 is rotatably installed between the two third adapter supporting plates 633.

The seventh rotating shaft is extended along a direction perpendicular to the third adapter connecting plate 632 , and the eighth rotating shaft 631 is extended along a direction perpendicular to the third adapter supporting plate 633 .

As shown in the drawings, the support structure includes a front cross brace 12 and a rear cross brace 13 arranged on the chassis 1, wherein the front cross brace 12 is arranged between the front parts of the bottom support rods 11 on both sides, and the rear cross brace 13 is arranged between the rear parts of the bottom support rods 11 on both sides. When the frame is in the unfolded state, the front cross brace 12 and the rear cross brace 13 both extend in the left-right direction, and both can be folded in the left-right direction. Here, the rear cross brace 13 is arranged as a telescopic rod structure, which specifically includes an outer rod 13a and an inner rod 13b that are slidably and telescopically connected to each other; the front cross brace 12 includes two cross bars 121 that can be relatively flipped and folded in the left-right direction, one end of the two cross bars 121 is rotatably connected through a third shaft 122, and the other end of each cross bar 121 is rotatably connected to the bottom support rod 11 on the side. When the frame is in the unfolded state, the two cross bars 121 extend in the same direction; when the frame is in the folded state, the two cross bars 121 extend in the front-rear direction and are folded between the bottom support bars 11 on both sides.

The frame is also provided with a linkage assembly for linking the two cross bars 121 to flip and fold backwards during the folding of the first support assembly 6 in the left-right direction. In this embodiment, the linkage assembly specifically includes two linkage rods 10, one linkage rod 10 is connected between a cross bar 121 and a first support rod 61, and the other linkage rod 10 is connected between another cross bar 121 and another first support rod 61, wherein the linkage rod 10 extends in the front-to-back direction, the front portion of the linkage rod 10 is rotatably connected to the cross bar 121 around a fourth axis 101, the rear portion of the linkage rod 10 is rotatably connected to the first support rod 61 around a fifth axis 102, the fifth axis 102 is located on the first support rod 61 between the first axis 60 and the first adapter 62, and the two fourth axes 101 are arranged on different sides of the third axis 122. When the two first support rods 61 rotate relative to each other and gather in the left-right direction, the fifth shaft 102 moves backward, so that the linkage rod 10 is pulled backward, thereby pulling the two cross rods 121 to flip relative to each other and extend in the front-back direction.

Referring to FIGS. 1 to 3 , the baby carriage of this embodiment is in an unfolded state, with the front support 2, the lower support 3, the upper support 4 and the bottom frame 1 unfolded relatively, the push handle frame 5 unfolded above the upper support 4, and the front wheel assembly 8 and the rear wheel assembly 9 supported at the bottom of the bottom frame 1. The first support assembly 6 and the second support assembly 7 are each unfolded in the left-right direction, and the front cross brace 12 and the rear cross brace 13 are also unfolded in the left-right direction and supported between the bottom support rods 11 on both sides. The baby carriage in the unfolded state has a simple structure and a large seating space, and an adult can stand behind the frame and hold the top of the push handle frame 5 to push the carriage.

11 to 13, when the baby carriage needs to be folded, the handle frame 5 is first flipped forward to be folded above the upper bracket 4 and close to the extension rod body 41b, and then the upper bracket 4 is driven to flip backward, the upper bracket 4 and the lower bracket 3 are relatively folded in the up and down direction, and the front bracket 2 is flipped backward, so that the upper bracket 4, the lower bracket 3 and the front bracket 2 are gradually folded downward relative to the bottom frame 1. In the above process, the lower part of the connecting rod section 31b in the lower bracket 3 moves backward and the upper part moves forward. The two first struts 61 of the first strut assembly 6 rotate relative to each other and gradually gather together in the left-right direction. At the same time, the two second struts 71 of the second strut assembly 7 rotate relative to each other and gradually gather together in the left-right direction. During the folding process of the first strut assembly 6, the two linkage rods 10 are linked to each other so that the front cross brace 12 is folded in the left-right direction. Under the force of the two side rods folding in the left-right direction, the rear cross brace 13 also slides and shortens in the left-right direction, and the two push handle rods 51 of the push handle frame 5 also rotate relative to each other in the left-right direction and gather together.

The folded baby carriage is shown in Figures 14 to 16. On the left and right sides of the frame, the bottom support rod 11, the lower support rod 31, the upper support rod 41, the front support rod 21 and the push handle rod 51 are retracted together, and the first support assembly 6 and the second support assembly 7 in the flip linkage mechanism are respectively folded along the left and right directions. The height and width of the baby carriage are greatly reduced, which brings convenience to the user's daily carrying and storage.

The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (13)

A baby carriage, comprising a frame with an unfolded state and a folded state, and a front wheel assembly and a rear wheel assembly arranged at the bottom of the frame, characterized in that: the frame comprises a bottom frame, a lower bracket, an upper bracket and a front bracket, the lower portion of the lower bracket is rotatably connected to the rear portion of the bottom frame, the upper bracket is rotatably connected to the lower bracket, the lower portion of the front bracket is rotatably connected to the front portion of the bottom frame, and the upper portion of the front bracket is rotatably connected to the upper bracket, and during the process of the frame being converted from an unfolded state to a folded state, the front bracket flips in a direction to approach the bottom frame, and the lower bracket and the upper bracket are relatively folded and gathered between the front bracket and the bottom frame. The baby carriage according to claim 1 is characterized in that: the bottom frame includes a pair of bottom support rods respectively arranged on the left and right sides and arranged oppositely; the lower bracket includes a pair of lower support rods respectively arranged on the left and right sides and arranged oppositely; the upper bracket includes a pair of upper support rods respectively arranged on the left and right sides and arranged oppositely; the front bracket includes a pair of front support rods respectively arranged on the left and right sides and arranged oppositely; A pair of frame structures are arranged along the left and right directions of the baby carriage, each of the frame structures includes the lower support rod, the bottom support rod, the front support rod and the upper support rod, wherein the lower support rod is rotatably connected to the bottom support rod, and the lower part of the front support rod is rotatably connected to the bottom support rod; the upper support rod is rotatably connected to the upper part of the front support rod, and the lower part of the upper support rod is rotatably connected to the lower support rod; the frame also has a supporting structure supported between the pair of frame structures, and the supporting structure can be folded to make the pair of frame structures move closer to each other. The baby carriage according to claim 2 is characterized in that: the frame further comprises a flip linkage mechanism disposed between a pair of the frame-type structures, the flip linkage mechanism is rotationally connected to the lower support rod in one of the frame-type structures, and the flip linkage mechanism is rotationally connected to a component other than the lower support rod in the other frame-type structure at the same time; In the process of the lower support rod flipping toward the base frame, the lower support rod drives the flip linkage mechanism to move, and pulls the two frame structures toward each other through the flip linkage mechanism. The baby carriage according to claim 3 is characterized in that: the flip linkage mechanism includes a first support assembly arranged between the lower support rods on both sides and the bottom support rods on both sides, the first support assembly includes two first support rods that cross each other and are rotatably connected to each other at the intersection, one end of the first support rod is rotatably connected to the bottom support rod in the frame structure, the other end of the first support rod is rotatably connected to the lower support rod in the frame structure on the other side, and in the vertical direction, the connection position between the first support rod and the lower support rod is located on the lower side of the connection position between the lower support rod and the bottom support rod. The baby carriage according to claim 4 is characterized in that: the flip linkage mechanism also includes a second support assembly arranged between the lower support rods on both sides and the bottom support rods on both sides, the second support assembly includes two second support rods that cross each other and are rotatably connected at the intersection, one end of the second support rod is rotatably connected to the upper support rod in the frame structure, and the other end of the second support rod is rotatably connected to the lower support rod in the other frame structure. The baby carriage according to claim 5 is characterized in that: the lower support rod includes a main rod section and a connecting rod section fixedly arranged on the main rod section, wherein when the frame is in the unfolded state, the lower part of the connecting rod section extends downward from the main rod section, the lower part of the main rod section is rotatably connected to the bottom support rod, and the first support rod is rotatably connected to the lower part of the connecting rod section. The baby carriage according to claim 6 is characterized in that: when the frame is in the unfolded state, the upper portion of the connecting rod segment extends rearwardly out of the main rod segment in the front-to-back direction, and the lower portion of the second support rod is rotationally connected to the upper portion of the connecting rod segment; the lower portion of the connecting rod segment extends forwardly out of the main rod segment in the front-to-back direction. The baby carriage according to claim 7 is characterized in that: the lower portion of the connecting rod section is rotatably connected to the first support rod via a first adapter, and the upper portion of the connecting rod section is rotatably connected to the second support rod via a second adapter; The first adapter is rotated on the inner side of the connecting rod section via a first rotating shaft, and the first rotating shaft is extended in the left-right direction; the first support rod is rotated on the first adapter via a second rotating shaft, and the extension direction of the second rotating shaft is perpendicular to the extension direction of the first rotating shaft; The second adapter is rotated on the inner side of the connecting rod section via a third rotating shaft, the third rotating shaft is extended in the left-right direction, the second support rod is rotated on the second adapter via a fourth rotating shaft, and the extension direction of the fourth rotating shaft is perpendicular to the extension direction of the third rotating shaft. The baby carriage according to claim 4 is characterized in that: the support structure includes a front cross brace arranged between a pair of bottom support rods, the front cross brace includes two cross bars that can be flipped relative to each other, the two cross bars are rotatably mounted on the pair of bottom support rods respectively, and the two cross bars are rotatably connected to each other; And/or, the support structure includes a rear cross brace arranged between a pair of bottom support rods, the rear cross brace has a telescopic rod structure, and the rear cross brace includes an outer rod and an inner rod that are relatively slidably telescopically connected. The baby carriage according to claim 9 is characterized in that: when the frame is in the unfolded state, the two cross bars extend in the same direction; when the frame is in the folded state, the two cross bars extend in the front-to-back direction and are gathered between the bottom support bars on both sides, the frame also includes a linkage assembly, the linkage assembly includes two linkage rods, the linkage rods extend in the front-to-back direction, the two first support bars are rotatably connected to each other through a first axis at the intersection, the front part of the linkage rod is rotatably connected to the cross bar, and the rear part of the linkage rod is rotatably connected to one of the first support bars and is located behind the first axis. The baby carriage according to claim 2 is characterized in that: the upper support rod has an upper support rod body, and the lower part of the upper support rod body is rotatably connected to the lower support rod; during the process of the frame being converted from an unfolded state to a folded state, the lower support rod is rotated and folded toward the direction of approaching the bottom support rod, and drives the upper support rod body to be folded between the lower support rod and the front support rod. The baby carriage according to claim 11 is characterized in that: the frame also includes a push handle frame, and the push handle frame includes two push handle rods respectively arranged on the left and right sides, one end of the two push handle rods are rotatably connected to each other, and the other end of the two push handle rods are rotatably connected to the upper part of the upper support rod on the side. Among them, the upper support rod also includes an extension rod body extending forward from the upper part of the upper support rod body, the front part of the extension rod body is rotatably connected to the upper part of the front support rod, and the push handle rod is rotatably connected to the upper part of the upper support rod body or the rear part of the extension rod body. When the frame is in a folded state, the push handle frame is folded in the left and right directions and retracted with the extension rod body. The baby carriage according to claim 1 is characterized in that: when the frame is in the unfolded state, the base frame extends horizontally in the front-to-back direction, the lower bracket, the upper bracket, and the front bracket each extend in the up-down direction, the front wheel assembly is arranged at the bottom front portion of the base frame, and the rear wheel assembly is arranged at the bottom rear portion of the base frame.