CN111483504A - stroller - Google Patents

Abstract

The invention discloses a children's stroller. The stroller frame includes a bottom frame, a front bracket, a connecting frame and a push rod assembly, wherein the bottom frame includes a front frame and a rear frame that can relatively slide and retract along the front and rear directions, and the rear wheel assembly is arranged at the rear of the rear frame; the connecting frame is rotatably connected with the front of the front frame, and the front wheel assembly is arranged at the bottom of the connecting frame; the lower part of the front bracket is rotatably connected with the connecting frame; the The push rod assembly is rotatably connected with the upper part of the front bracket; the cart frame also includes a link assembly connected between the front bracket, the push rod assembly and the bottom frame, when the cart When the frame is in a folded state, the push rod assembly and the front bracket are folded above the bottom frame, the front wheel assembly is turned backward and is folded with the bottom frame, and the bottom frame is shortened in the front-rear direction , which greatly reduces the size of the folded cart frame.

Description

stroller

technical field

The present invention relates to a children's stroller.

Background technique

A child stroller in the prior art includes a stroller frame with an unfolded state and a folded state, a front wheel assembly and a rear wheel assembly disposed at the bottom of the stroller frame, and a seat and a rear wheel assembly disposed on the stroller frame. A locking mechanism for locking the cart frame in the unfolded state, some of which include a bottom frame, and the front wheel assembly and the rear wheel assembly are respectively arranged at the bottom of the front and rear ends of the bottom frame. All other rods on the frame are tucked above the bottom frame. At present, the structure of the stroller frame is various, and the folding principle and the folded size are also different. How to obtain a children's stroller with the smallest folded size and convenient folding operation is the continuous pursuit of those in the art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a children's stroller with a novel structure.

In order to achieve the above object, the technical solution adopted in the present invention is: a child stroller, comprising a stroller frame having an unfolded state and a folded state, a front wheel assembly, a rear wheel assembly, and a stroller frame for attaching the stroller frame. Locking a locking mechanism in a deployed state, the cart frame includes:

a bottom frame, which extends in the front-rear direction, the bottom frame includes a front frame and a rear frame that can relatively slide and retract along the front-rear direction, and the rear wheel assembly is arranged at the rear of the rear frame;

a connecting frame, the connecting frame is rotatably connected with the front part of the front frame, and the front wheel assembly is arranged at the bottom of the connecting frame;

a front bracket, the lower part of the front bracket is rotatably connected with the connecting frame;

a push rod assembly, the push rod assembly is rotatably connected with the upper part of the front bracket;

a connecting rod assembly, the connecting rod assembly is connected between the front bracket, the push rod assembly and the bottom frame,

When the cart frame is in a folded state, the push rod assembly and the front bracket are folded above the bottom bracket, and the connecting bracket rotates relative to the front bracket and the front bracket, so that the front bracket and the front bracket are rotated. The wheel assembly is turned backward and is folded with the chassis, and the chassis is shortened in the front-rear direction.

Preferably, the connecting rod assembly includes a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is rotatably connected with the second connecting rod through a first shaft, and the first connecting rod One end of the rod is rotatably connected to the lower part of the push rod assembly, the second link is rotatably connected between the front bracket and the front frame, and the third link is rotatably connected to the front frame between the other end of the first link and the rear frame.

Further, a four-link mechanism is formed between the front bracket, the push rod assembly, the first link and the second link; the front bracket, the connecting frame, the front frame Another four-link mechanism is formed between the second link and the second link.

Further, the rear end of the second connecting rod is rotatably connected to the front frame around the first axis, and the lower part of the front bracket is rotatably connected to the connecting frame through the second axis, and the front The front part of the frame is rotatably connected to the connecting frame through a third shaft, and in the unfolded state of the cart frame, the second shaft is located above the third shaft in the height direction.

Further, the cart frame further includes a seat frame extending in the front-rear direction, the front part of the seat frame is rotatably connected to the front bracket, and a sliding member is rotatably provided on the first link, The sliding member is slidably arranged on the seat frame along the front-rear direction.

Further, the front frame has two front bottom rods arranged on the left and right sides respectively, and the rear frame has two rear bottom rods arranged on the left and right sides respectively. The rear bottom rods are relatively slidably connected, the front bracket has two front support rods that are respectively arranged on the left and right sides, and the push rod assembly has two push rods that are respectively arranged on the left and right sides. Correspondingly, the connecting rod assembly There are two groups on the left and right sides.

Further, the first link includes a vertical rod section extending in the up-down direction, and a cross rod section bent backward from the lower end of the vertical rod section, and the front part of the third link is connected to the The rear end of the cross bar segment is rotatably connected, and the rear end of the third link is rotatably connected to the rear bottom bar. When the cart frame is in the unfolded state, the cross bar segment is connected to the The third link extends along the same length direction and is gathered inside the rear bottom bar.

As a preferred embodiment, the connecting frame includes a horizontal frame extending in the left-right direction, the left end and the right end of the horizontal frame respectively form lugs extending upward and outward obliquely, and the lower part of the front strut rotatably attached to the lugs on the same side.

As a preferred embodiment, the rear bottom rod is slidably sleeved on the front bottom rod, and when the cart frame is in a folded state, the rear end of the front bottom rod protrudes above the front bottom rod. Behind the rear end of the rear bottom bar.

As a preferred embodiment, the left end and the right end of the connecting frame respectively have wheel seat joints, the front wheel assemblies are mounted on the wheel seat joints, and the two groups of the front wheel assemblies are located in the left and right directions on the Left and right sides of the chassis.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: the stroller of the present invention has the following advantages: by arranging a link assembly between the push rod assembly, the front bracket and the bottom frame, the stroller frame is folded. When the push rod assembly and the front bracket are rotated and folded relative to the chassis, the connecting rod assembly drives the connecting bracket to rotate, so that the front wheel assembly is turned backward and folded with the chassis, and the chassis is shortened in the front-rear direction. The rear wheel assembly is folded forward toward the front wheel assembly, thereby greatly reducing the folded size of the cart frame.

Description of drawings

Accompanying drawing 1 is the perspective view in the unfolded state of the cart frame in the present invention;

Accompanying drawing 2 is the side view in the unfolded state of the cart frame in the present invention;

3 is a perspective view of the push rod assembly of the cart frame in the present invention after being folded;

4 is a side view of the push rod assembly of the cart frame in the present invention after being folded;

Accompanying drawing 5 is the perspective view during the folding process of the cart frame in the present invention;

Accompanying drawing 6 is the side view during the folding process of the cart frame in the present invention;

7 is a perspective view of the cart frame in a folded state according to the present invention;

8 is a side view of the cart frame in the folded state of the present invention;

in:

1. Bottom frame; 11. Front bottom bar; 12. Rear bottom bar; 13. Rear cross bar;

2, connecting frame; 21, horizontal frame; 22, lug; 23, wheel seat joint;

3. Front bracket; 31. Front strut;

4, push rod assembly; 41, push rod; 42, push handle rod; 43, push handle bar;

5. The first connecting rod; 5a, the vertical rod section; 5b, the horizontal rod section;

6. The second connecting rod; 7. The third connecting rod;

8. Seat frame; 81. Seat post; 82. Seat post crossbar;

9. Sliding member (slip sleeve); 10. Front wheel assembly; 20. Rear wheel assembly; 30. Unlock operating member;

101, the first axis; 102, the second axis; 103, the third axis; 104, the fourth axis; 105, the fifth axis; 106, the sixth axis; 107, the seventh axis; 108, the eighth axis.

Detailed ways

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

Referring to Figures 1 to 8, a children's stroller includes a stroller frame having an unfolded state and a folded state, a front wheel assembly 10, a rear wheel assembly 20, and a device for locking the stroller frame in the unfolded state. Locking mechanism in state.

The cart frame includes a bottom frame 1, a connecting frame 2, a front bracket 3, and a push rod assembly 4, wherein: the bottom frame 1 extends in the front-rear direction, and the bottom frame 1 includes a front frame and a rear frame that can relatively slide and extend in the front-rear direction. , the rear wheel assembly 20 is arranged at the rear of the rear frame; the connecting frame 2 is rotatably connected to the front of the front frame, and the front wheel assembly 10 is arranged at the bottom of the connecting frame 2; The lower part thereof is rotatably connected to the connecting frame 2 ; the push rod assembly 4 extends from the front to the rear gradually and inclined upward, and the lower part thereof is rotatably connected with the upper part of the front bracket 3 . The cart frame also includes a connecting rod assembly, which is connected between the front bracket 3 , the push rod assembly 4 and the bottom frame 1 . When the vehicle frame is folded, the connecting rod assembly drives the connecting frame 2 to rotate, so that the front wheel assembly 10 is turned backward and folded with the bottom frame 1, and at the same time, the length of the bottom frame 1 is shortened in the front-rear direction, so that the rear wheel assembly 20 faces forward. The front wheel assembly 10 is folded to substantially reduce the folded size of the cart frame.

Specifically, referring to the drawings, in the bottom frame 1, the front frame includes two front bottom rods 11 that are arranged on the left and right sides and both extend in the front-rear direction, and the rear frame includes two front bottom bars 11 that are arranged on the left and right sides and both extend in the front-rear direction. Two extended rear bottom rods 12, a rear cross rod 13 is fixedly connected between the two rear bottom rods 12, on the left and right sides, the front bottom rod 11 and the rear bottom rod 12 are relatively slidably connected, here specifically the rear bottom The rod 12 is slidably sleeved on the front bottom rod 11 . The front ends of the front bottom rods 11 on both sides are rotatably connected to the connecting frame 2 through the third shaft 103 .

The front bracket 3 has two front support rods 31 respectively disposed on the left and right sides. The lower ends of the two front support rods 31 are respectively connected to the connecting frame 2 through a second shaft 102 rotatably. The second shaft 102 is located in the height direction. Above the third axis 103 . In the present embodiment, the connecting frame 2 includes a horizontal frame 21 extending in the left-right direction. The left end and the right end of the horizontal frame 21 respectively form lugs 22 extending upward and obliquely outward. The lower part of the front support rod 31 is rotatably connected on the lug 22 on the same side as it. The part of the cross frame 21 between the two lugs 22 is also formed as a footrest for children to place their feet. The two groups of front wheel assemblies 10 are respectively arranged at the outermost ends of the left and right sides of the horizontal frame 21 . Here, the left and right ends of the connecting frame 2 respectively have wheel seat joints 23 , and the front wheel assemblies 10 are installed on the wheel seat joints 23 and the two groups of front wheel assemblies 10 are located on the left and right sides of the chassis 1 in the left-right direction.

The push rod assembly 4 includes two sets of push rods 41 respectively arranged on the left and right sides, a push handle rod 42 slidably and telescopically connected with the push rod 41 , and a push handle bar 43 fixedly connected between the upper ends of the push rod rods 42 on both sides. , the lower parts of the push rods 41 on the left and right sides are rotatably connected with the upper end of the front support rod 31 on the same side through the fifth shaft 105 .

The connecting rod assembly has two groups located on the left and right sides, and each set of connecting rod assemblies includes a first connecting rod 5 , a second connecting rod 6 and a third connecting rod 7 . On the left and right sides of the cart frame, the first connecting rod 5 is rotatably connected with the second connecting rod 6 through the first shaft 101 , and one end of the first connecting rod 5 is connected with the lower end of the push rod 41 through the sixth shaft 106 Rotationally connected, the sixth shaft 106 is located below the fifth shaft 105 on the push rod 41; the other end of the first link 5 is rotatably connected to one end of the third link 7 through the seventh shaft 107, the first The other end of the three link 7 is rotatably connected to the rear bottom rod 12 through the eighth shaft 108 . One end of the second link 6 is rotatably connected to the front support rod 31 through the fourth shaft 104, and the other end is rotatably connected to the front bottom rod 11. In this embodiment, the second link 6 is rotated around the first The shaft 101 is rotatably connected to the front bottom rod 11 , that is, the second link 6 , the first link 5 and the front bottom rod 11 are rotatably connected together around the first shaft 101 .

In this way, on the left and right sides of the cart frame, the front support rod 31, the push rod 41, the first link 5 and the second link 6 are connected to the fifth shaft 105, the sixth shaft 106, the fourth shaft 104, the first link 5 and the second link 6. A four-bar linkage mechanism is formed between the shafts 101; Another four-bar linkage is formed between them; the front bottom rod 11 , the rear bottom rod 12 , the third link 7 and the first link 5 are formed between the first shaft 101 , the seventh shaft 107 and the eighth shaft 108 a crank mechanism.

In this embodiment, the first link 5 of the link assembly is set as follows: the first link 5 includes a vertical rod section 5a extending in the up-down direction, and a horizontal rod section 5a bent backward from the lower end of the vertical rod section 5a. In the rod segment 5b, the front part of the third link 7 is rotatably connected to the rear end of the cross rod segment 5b, and the rear end of the third link 7 is rotatably connected to the rear bottom rod 12. In this way, when the cart frame is in the unfolded state, as shown in FIGS. 1 to 2 , the cross bar section 5b and the third link 7 can extend along the same length direction and be folded inside the rear bottom bar 12, so that the cart can be The structure of the frame in the unfolded state is very simple.

The cart frame further includes a seat frame 8 extending in the front-rear direction, and the seat frame 8 is disposed between the front struts 31 and the link assemblies on both sides in the left-right direction. Specifically, the seat frame 8 has two seat bars 81 respectively arranged on the left and right sides and extending in the front-rear direction, and a plurality of seat bar cross bars 82 fixedly arranged between the two seat bars 81. On the left and right sides, the front part of the seat post 81 is rotatably connected to the front support rod 31, and the first link 5 is rotatably provided with a sliding member 9, where the sliding member 9 is a sliding sleeve, and the sliding sleeve is along the seat post. The length extending direction of the seat post 81 is slidably sleeved on the seat post 81 .

In this way, when the cart frame is in the unfolded state, as shown in FIGS. 1 and 2 , on the left and right sides of the cart frame, the front bottom rod 11 and the rear bottom rod 12 are relatively elongated, and the push rod assembly 4 pushes The lever 42 is unfolded relative to the push rod 41, the front support rod 31 and the push rod 41 extend along the same length direction, the front support rod 31, the push rod 41, the first link 5 and the front bottom rod 11 form a triangular structure, and the first The third link 7 and the cross bar section 5b of the first link 5 extend along the same length direction and are substantially parallel to the extending direction of the front bottom rod 11 and the rear bottom rod 12, and the third link 7 is viewed from the outside of the cart frame The cross bar section 5b is shielded by the front bottom bar 11 and the rear bottom bar 12 . The frame structure of the cart in the unfolded state is very simple, and has good stability and bearing capacity. The locking mechanism of the cart frame can be provided at the rotational connection between the front support rod 31 and the push rod 41 , and an unlocking operating member 30 is also provided on the push handle bar 43 .

When the cart frame needs to be folded up, first unlock the locking mechanism, then shrink the push rod 42 of the push rod assembly 4 relative to the push rod 41 to shorten the length of the push rod assembly 4, as shown in Figures 3 and 4 Then, flip the push rod assembly 4 in the direction of the arrow A in FIG. 4 , as shown in FIG. 5 and FIG. 6 , the upper part of the front bracket 3 moves backwards and downwards, driving the connecting frame 2 around the third axis 103 relative to the bottom The frame 1 rotates, so that the front wheel assembly 10 is turned over and folded backward in the direction of arrow B in FIG. 4 and is folded with the bottom frame 1; The end moves forward, drives the third link 7 to move forward, and drives the rear bottom rod 12 to slide forward relative to the front bottom rod 11, as shown in the direction of arrow C in Figure 4, so that the length of the bottom frame 1 is shortened, and the rear wheel The assembly 20 moves forward to reduce the distance from the front wheel assembly 10 .

The folded cart frame is shown in Figures 7 and 8. The push rod assembly 4 and the front bracket 3 are folded above the bottom frame 1, and the seat frame 8 is also folded between the first link 5 and the front bracket 3. The rear end of the front bottom bar 11 protrudes to the rear of the rear end of the rear bottom bar 12 , the front wheel assembly 10 and the rear wheel assembly 20 are relatively closed in the front-rear direction and both are closed on the left and right sides of the chassis Compared with the unfolded state of the stroller frame, the distance is greatly reduced, and the front wheel assembly 10 and the bottom frame 1 are partially overlapped in height, so that the overall height of the stroller frame is significantly reduced after being folded. The folded cart frame has a compact structure and a very small volume.

When the cart frame needs to be opened, it is only necessary to pull up the upper part of the push rod assembly 4 to complete the unfolding operation, which is very convenient.

The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the art to understand the content of the present invention and implement them accordingly, and cannot 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 within the protection scope of the present invention.

Claims (10)

1. The utility model provides a children's shallow, is including having shallow frame, front wheel subassembly, the rear wheel subassembly of expansion state and fold condition, and be used for with the locking mechanical system of shallow frame locking under the expansion state, its characterized in that, the shallow frame includes:

the chassis extends along the front-back direction, the chassis comprises a front frame and a rear frame which can relatively slide and stretch along the front-back direction, and the rear wheel assembly is arranged at the rear part of the rear frame;

the connecting frame is rotatably connected with the front part of the front frame, and the front wheel assembly is arranged at the bottom of the connecting frame;

the lower part of the front bracket is rotationally connected with the connecting frame;

the push rod assembly is rotatably connected with the upper part of the front bracket;

a connecting rod assembly connected among the front bracket, the push rod assembly and the bottom frame,

when the cart frame is in a folded state, the push rod assembly and the front support are folded above the bottom frame, the connecting frame is opposite to the front support and the front support rotates, so that the front wheel assembly turns backwards and is mutually folded with the bottom frame, and the bottom frame is shortened along the front-back direction.

2. The stroller of claim 1, wherein: the connecting rod assembly comprises a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is connected with the second connecting rod in a rotating mode through a first shaft, one end portion of the first connecting rod is connected with the lower portion of the push rod assembly in a rotating mode, the second connecting rod is connected between the front support and the front support in a rotating mode, and the third connecting rod is connected between the other end portion of the first connecting rod and the rear support in a rotating mode.

3. The stroller of claim 2, wherein: a four-bar linkage is formed among the front bracket, the push rod assembly, the first connecting rod and the second connecting rod; another four-bar linkage mechanism is formed among the front bracket, the connecting frame, the front bracket and the second connecting bar.

4. The stroller of claim 2, wherein: the rear end of the second connecting rod winds the first shaft and is rotationally connected with the front frame, the lower portion of the front support is rotationally connected with the connecting frame through the second shaft, the front portion of the front frame is rotationally connected with the connecting frame through the third shaft, and the second shaft is located above the third shaft in the height direction in the unfolded state of the cart frame.

5. The stroller of claim 2, wherein: the stroller frame further comprises a seat frame extending in the front-back direction, the front portion of the seat frame is rotatably connected to the front support, a sliding piece is rotatably arranged on the first connecting rod, and the sliding piece is slidably arranged on the seat frame in the front-back direction.

6. Child stroller according to any of claims 2 to 5, characterized in that: the utility model discloses a push rod assembly, including the left and right sides, preceding frame, back frame, push rod assembly, preceding frame, back frame, preceding sill bar, back sill bar, preceding frame has two preceding sill bars of branch locating the left and right sides, the back frame has two back sill bars of branch locating the left and right sides, on each side about, preceding sill bar with back sill bar relatively slidingly connects, preceding frame has two preceding branch poles of branch locating the left and right sides, push rod assembly has two push rods of branch locating the left and right sides, correspondingly, link assembly has two sets of branch locating the left and right.

7. The stroller of claim 6, wherein: the utility model discloses a shallow car frame, including first connecting rod, last bottom bar, the last bottom bar is connected with the last bottom bar of last bottom bar.

8. The stroller of claim 6, wherein: the connecting frame comprises a transverse frame extending along the left-right direction, the left end part and the right end part of the transverse frame are respectively provided with a lug extending upwards and outwards in an inclined mode, and the lower part of the front supporting rod is rotatably connected to the lug on the same side.

9. The stroller of claim 6, wherein: the back sill bar is established with sliding ground on the preceding sill bar, works as when the shallow frame is in fold condition, the rear end of preceding sill bar stretches out the rear of back sill bar rear end.

10. The stroller of claim 6, wherein: the left end and the right end of the connecting frame are respectively provided with a wheel seat joint, the front wheel assemblies are arranged on the wheel seat joints, and the two groups of front wheel assemblies are positioned on the left side and the right side of the underframe in the left-right direction.

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