CN101670844B - a stroller - Google Patents

Abstract

The invention relates to an infant pushcart comprising a first front-wheel support, a first push rod, a first rear-wheel support, a first front seat rod, a first rear seat rod, a first sliding piece, a first connecting rod and a first limiting mechanism. The first push rod and the first front-wheel support are arranged in a sliding way; the first rear-wheel support is rotationally connected with the upper part of the first push rod; the first front seat rod is rotationally connected with the first front-wheel support; the first rear seat rod is rotationally connected with the lower part of the first rear-wheel support; the first sliding piece is arranged on the first rear-wheel support in a sliding way; the lower end of the first connecting rod is movably connected with the first rear seat rod; the first limiting mechanism is used for the limiting the rotating shafts of both the first front seat rod and the first rear seat rod moving downwards from the potion where the frame of the infant pushcart is unfolded; the upper end of the first connecting rod is rotationally connected with the first sliding piece; and the first front seat rod is rotationally connected with the first rear seat rod. After the infant pushcart is folded, the upper part of the first push rod is still arranged above, thus the infant pushcart is convenient for the user to take.

Description

a stroller

technical field

The invention relates to a baby stroller.

Background technique

In the prior art, as shown in the patent document of Chinese Publication No. CN1600616, a baby stroller includes a first push handle, a second push handle, and a first push handle whose upper end is rotatably connected to the lower part of the first push handle. A rear wheel bracket, a second rear wheel bracket whose upper end is rotatably connected to the lower part of the second push handle, a first front wheel bracket whose upper end is rotatably connected to the lower end of the first push rod, and an upper end a second front wheel bracket rotatably connected to the lower end of the second push rod, a foldable first bracket arranged between the first rear wheel bracket and the second rear wheel bracket, The two rods are crossed and connected to each other at the intersection, and the cross is located between the first rear wheel bracket, the second rear wheel bracket, the first push handle, and the second push handle, The first front wheel bracket and the first rear wheel bracket are respectively rotatably connected to the front and rear parts of the first connecting rod, and the second front wheel bracket and the second rear wheel bracket are respectively The front part and the rear part of the second connecting rod are rotatably connected, and the first front wheel support, the first push handle, the first rear wheel support and the first connecting rod form a four-link Bar mechanism, described second front wheel support, described second push handle, described second rear wheel support, described second connecting rod also constitute four-bar linkage. During the transformation process of the baby stroller from the unfolded position to the folded position, the first push handle and the second push handle must be turned forward to be folded.

Contents of the invention

The technical problem to be solved by the present invention is to provide a baby stroller.

In solving the above-mentioned technical problems, a kind of technical scheme that the present invention adopts is:.

A baby stroller, comprising a stroller frame with an unfolded position and a folded position, a front wheel assembly arranged at the bottom front of the stroller frame, and a front wheel assembly arranged at the bottom rear of the stroller frame rear wheel assembly, a locking device for locking the cart frame in the unfolded position, and the cart frame includes

first front wheel bracket;

The first push rod, the first push rod is arranged to slide with the first front wheel bracket along the length direction of the first front wheel bracket, and the first push rod and the first front wheel bracket form a telescopic rod, and the first push rod may be in the lumen of the first front wheel bracket, or the first front wheel bracket may be in the lumen of the first push rod;

The first rear wheel bracket, the upper end of the first rear wheel bracket is rotationally connected with the upper part of the first push rod;

a first front seat post, the front part of the first front seat post is rotatably connected to the first front wheel bracket;

The first rear seat post, the rear part of the first rear seat post is rotationally connected with the lower part of the first rear wheel bracket, the first front seat post is connected with the first rear seat post rotationally connected, the rotational connection between the first front seat post and the first rear seat post is behind the rotational connection between the first front seat post and the first front wheel bracket;

The first sliding part, the first sliding part can be slidably arranged on the first rear wheel support along the length direction of the first rear wheel support, the first sliding part can be a bushing, the The sleeve sleeve is slidably sleeved on the first rear wheel bracket, or a long slot may be opened on the first rear wheel bracket along its length direction, and the first sliding member is slidably inserted into the long in the tank;

The first connecting rod, the lower end of the first connecting rod is movably connected with the first rear seat post, the articulated connection may be a rotating connection or a rotating and sliding connection, the first The upper end of the connecting rod is rotationally connected with the first sliding member;

The first limiting mechanism is used to limit the downward movement of the rotation shafts of the first front seat post and the first rear seat post when the cart frame is in the unfolded position.

In some embodiments, the lower end of the first connecting rod is rotatably connected to the first rear seat post.

In some embodiments, the lower end of the first connecting rod may be provided with a first guide groove along the front-rear direction, the first rear seat post is fixed with a first pin, and the first The pin is inserted in the first guide groove. The first pin can both rotate and slide in the first guide groove.

In some further embodiments, the lower end of the first connecting rod has a third stopper, and the rear end of the first front seat post is provided with a first elastic tongue, when the cart When the frame is in the unfolded position, the third stopper presses on the first elastic tongue, so that the frame is more stable in the unfolded state, and the first front seatpost and the first rear The pivot point between the seatposts does not move up, and the stroller frame is more rigid.

In some embodiments, the first limiting mechanism includes a first limiting member fixedly connected to one of the first front seat post and the first rear seat post, when the When the cart frame is in the expanded position, the other of the two is pressed against the first limiting member, and the structure is relatively simple.

In some embodiments, the cart frame also includes

second front wheel bracket;

The second push rod, the second push rod is arranged to slide with the second front wheel bracket along the length direction of the second front wheel bracket, and the second push rod and the second front wheel bracket form a telescopic rod, and the second push rod may be in the lumen of the second front wheel bracket, or the second front wheel bracket may be in the lumen of the second push rod;

a second rear wheel bracket, the upper end of the second rear wheel bracket is rotationally connected to the upper part of the second push rod;

a second front seat post, the front part of the second front seat post is rotatably connected to the second front wheel bracket;

The second rear seat post, the rear part of the second rear seat post is rotationally connected with the lower part of the second rear wheel bracket, the second front seat post is connected with the second rear seat post rotationally connected, the rotational connection between the second front seat post and the second rear seat post is behind the rotational connection between the second front seat post and the second front wheel bracket;

The second sliding part, the second sliding part can be slidably arranged on the second rear wheel support along the length direction of the second rear wheel support, the second sliding part can be a sleeve, the The sleeve sleeve is slidably sleeved on the second rear wheel bracket, or a long slot may be provided on the second rear wheel bracket along its length direction, and the second sliding member is slidably inserted into the long slot. in the tank;

The second connecting rod, the lower end of the second connecting rod is movably connected with the second rear seat post. The upper end of the connecting rod is rotationally connected with the second sliding member;

a second limiting mechanism for limiting the rotation shafts of the second front seatpost and the second rear seatpost to move downward when the cart frame is in the unfolded position;

A foldable bottom brace, the bottom brace is formed by intersecting the first bottom brace and the second bottom brace and being rotatably connected at the intersection, the bottom brace is arranged on the The rear part of the first front seat post, the rear part of the second front seat post, the rear part of the first rear seat post, the rear part of the second rear seat post, or is arranged on the above the rear part of the first front seat post, the rear part of the second front seat post, the lower part of the first rear wheel bracket, and the lower part of the second rear wheel bracket;

A foldable rear bracket, the rear bracket is set on the first rear wheel bracket and the second rear wheel bracket, or the rear bracket is set on the first rear wheel bracket The bottom of the wheel bracket, the bottom of the second rear wheel bracket, the first slider, and the second slider. The cart frame can be folded not only in the front, rear, up and down directions, but also in the lateral direction, so that the folded structure is compact and the volume is small.

In some further embodiments, the lower end of the second connecting rod is rotatably connected to the second rear seat post.

In some further embodiments, the lower end of the second connecting rod may be provided with a second guide groove along the front-rear direction, the second rear seat post is fixed with a second pin, and the second rear seat post is fixed with a second pin. Two pins are inserted in the second guide groove. The second pin can rotate and slide in the second guide groove.

In some further embodiments, the lower end of the second connecting rod has a fourth stopper, and the rear end of the second front seatpost is provided with a second elastic tongue, when the cart When the vehicle frame is in the unfolded position, the fourth limiting member presses on the second elastic tongue. Therefore, the vehicle frame is more stable in the unfolded state, the pivot point between the second front seat post and the second rear seat post will not move upward, and the stroller frame has better rigidity.

In some further embodiments, the second limiting mechanism includes a second limiting member fixedly connected to one of the second front seat post and the second rear seat post, when When the trolley frame is in the unfolded position, the other of the two pushes against the second limiting member. The structure is relatively simple.

The scope of the present invention is not limited to technical solutions formed by a specific combination of the above technical features, but also covers other technical solutions formed by any combination of the above technical features or equivalent features. For example, technical solutions formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art: when the present invention is folded, only the first sliding part needs to be pulled upwards, and the first connecting rod moves up with the first sliding part, and the first front seat post 1. The turning point between the first rear seat bars moves upward, so that the first front wheel bracket and the first rear wheel bracket are folded closer, and the first push rod is downward relative to the first front wheel bracket Move, so that the cart frame is folded, and the upper part of the first push rod is still located at the top after folding, which is convenient for the user to take.

Description of drawings

Accompanying drawing 1 is the front view of the present invention (embodiment one, cart frame is in unfolded position);

Accompanying drawing 2 is the front view of the present invention (embodiment one, the cart frame is in the transition process between unfolded position and folded position);

Accompanying drawing 3 is the front view of the present invention (embodiment one, cart frame is in folded position);

Accompanying drawing 4 is the front view of the present invention (embodiment two, cart frame is in unfolded position);

Accompanying drawing 5 is the front view of the present invention (embodiment 2, the cart frame is in the transition process between unfolded position and folded position);

Accompanying drawing 6 is the front view of the present invention (embodiment two, cart frame is in folded position);

Accompanying drawing 7 is the three-dimensional view of the present invention (embodiment two, cart frame is in unfolded position);

Accompanying drawing 8 is the perspective view of the present invention (embodiment three, cart frame is in unfolded position);

Accompanying drawing 9 is the enlarged view of place A of accompanying drawing 8;

Accompanying drawing 10 is the three-dimensional view of the present invention (embodiment 3, the cart frame is in the conversion process between the unfolded position and the folded position).

Among them: 1. Cart frame; 2. The first front wheel assembly; 3. The first front wheel assembly; 4. The first rear wheel assembly; 5. The second rear wheel assembly; 6. The first front wheel bracket; 7 , the second front wheel support; 8, the first push rod; 9, the second push rod; 10, the first push handle; 11, the second push handle; 12, the first rear wheel support; 13, the second rear wheel support ; 16, the first connecting rod; 17, the second connecting rod; 18, the first sliding member; 19, the second sliding member; 20, the bottom brace; 21, the first bottom brace; 22, the second bottom brace ; 23, rear support frame; 24, the first front seat post; 25, the first rear seat post; 26, the second front seat post; 27, the second rear seat post; 32, the first rear strut; 33, the second rear strut; 40, the third spacer; 41, the first elastic tongue; 42, the first guide groove; 43, the first pin.

Detailed ways

Embodiment 1: As shown in accompanying drawings 1-3, a baby stroller includes a stroller frame 1 with an unfolded position and a folded position, and a bottom front part of the stroller frame 1 . The front wheel assembly, the rear wheel assembly arranged at the bottom rear part of the cart frame 1, and the locking device for locking the cart frame 1 in an unfolded position.

The cart frame 1 includes side supports on both sides, a cross bar fixedly connected between the side supports on both sides, and a seat (the seat is not shown) arranged between the side supports on both sides. .

The side brackets on each side are included

The first front wheel bracket 6, the bottom of the first front wheel bracket 6 is connected with a front wheel assembly;

The first push rod 8, the first push rod 8 is arranged to slide with the first front wheel bracket 6 along the length direction of the first front wheel bracket 6, and the first push rod 8 The upper end portion has a first push handle 10;

The first rear wheel bracket 12, the upper end of the first rear wheel bracket 12 is rotationally connected with the upper part of the first push rod 8, and the bottom of the first rear wheel bracket 12 is connected with a rear wheel components;

A first front seat post 24, the front portion of the first front seat post 24 is rotatably connected to the first front wheel bracket 6;

The first rear seat post 25, the rear end of the first rear seat post 25 is rotationally connected with the bottom of the first rear wheel bracket 12, the first front seat post 24 is connected with the first rear seat post 24 A rear seat post 25 is rotationally connected, and the rotational connection between the first front seat post 24 and the first rear seat post 25 is located between the first front seat post 24 and the first front wheel bracket 6 at the rear of the swivel connection;

The first sliding member 18, the first sliding member 18 is slidably arranged on the first rear wheel support 12 along the length direction of the first rear wheel support 12;

The first connecting rod 16, the lower end of the first connecting rod 16 is rotationally connected with the roughly middle part of the first rear seat post 25, and the upper end of the first connecting rod 16 is connected with the said first rear seat post 25. The first sliding member 18 is rotatably connected;

The first limiting mechanism for limiting the rotation shafts of the first front seat post 24 and the first rear seat post 25 to move downward when the cart frame 1 is in the unfolded position, the The first limiting mechanism includes a first limiting member 29 fixedly connected to the first rear seatpost 25, when the cart frame 1 is in the unfolded position, the first front seatpost 24 The rear portion is pressed against the first limiting member 29 .

Regarding the said locking device, it may be arranged between any two components that have a sliding relationship or a rotating relationship. Such as between the first sliding member 18 and the first rear wheel bracket 12 described above. After being folded, the front wheel assembly and the rear wheel assembly support the folded trolley frame on the ground, thereby realizing self-support.

Embodiment 2, as shown in accompanying drawing 4-accompanying drawing 7, a kind of stroller, comprises the stroller frame 1 that has expanded position and folded position, is arranged on the seat on the stroller frame 1 (the seat is not shown ), the front wheel assembly arranged at the bottom front portion of the cart frame 1, the rear wheel assembly arranged at the bottom rear portion of the cart frame 1, used to place the cart frame 1 Locking device locked in the unfolded state. The front wheel assembly includes a first front wheel assembly 2 and a second front wheel assembly 3 , and the rear wheel assembly includes a first rear wheel assembly 4 and a second rear wheel assembly 5 .

The stroller frame 1 includes a first side bracket, a second side bracket, a foldable bottom bracket 20, a foldable rear bracket 23,

The first side bracket includes

The first front wheel bracket 6, the first front wheel assembly 2 is arranged on the lower part of the first front wheel bracket 6;

The first push rod 8, the first push rod 8 is arranged to slide with the first front wheel bracket 6 along the length direction of the first front wheel bracket 6, and the first push rod 8 The upper end portion has a first push handle 10;

The first rear wheel bracket 12, the upper end of the first rear wheel bracket 12 is rotationally connected with the upper part of the first push rod 8, and the first rear wheel assembly 4 is arranged on the first rear wheel assembly 4. The bottom of a rear wheel support 12;

A first front seat post 24, the front portion of the first front seat post 24 is rotatably connected to the first front wheel bracket 6;

The first rear seat post 25, the rear end of the first rear seat post 25 is rotationally connected with the bottom of the first rear wheel bracket 12, the first front seat post 24 is connected with the first rear seat post 24 A rear seat post 25 is rotatably connected, and the rotational connection between the first front seat post 24 and the first rear seat post 25 is located between the first front seat post 24 and the first front wheel bracket 6 at the rear of the swivel connection;

The first sliding member 18, the first sliding member 18 is slidably arranged on the first rear wheel support 12 along the length direction of the first rear wheel support 12;

The first connecting rod 16, the lower end of the first connecting rod 16 is rotationally connected with the first rear seat rod 25, the upper end of the first connecting rod 16 is connected with the first sliding Part 18 is rotationally connected;

The first limiting mechanism for limiting the rotation shafts of the first front seat post 24 and the first rear seat post 25 to move downward when the cart frame 1 is in the unfolded position, the The first limit mechanism includes a first limit member 29 fixedly connected to the first rear seat post 25. When the cart frame 1 is in the unfolded position, the first front seat post 24 presses On the first limiting member 29,

The second side bracket includes

The second front wheel bracket 7, the second front wheel assembly 3 is arranged on the bottom of the second front wheel bracket 7;

The second push rod 9, the second push rod 9 is arranged to slide with the second front wheel bracket 7 along the length direction of the second front wheel bracket 7, and the second push rod 9 There is a second push handle 11 at the upper end;

The second rear wheel bracket 13, the upper end of the second rear wheel bracket 13 is rotationally connected with the upper part of the second push rod 9, and the second rear wheel assembly 5 is arranged on the second rear wheel assembly 5. The bottom of the two rear wheel brackets 13;

The second front seat post 26, the front part of the second front seat post 26 is rotatably connected with the second front wheel bracket 7;

The second rear seat post 27, the rear end of the second rear seat post 27 is rotatably connected to the bottom of the second rear wheel bracket 13, the second front seat post 26 is connected to the first rear seat post 27. The two rear seat posts 27 are rotatably connected, and the rotational connection between the second front seat post 26 and the second rear seat post 27 is located between the second front seat post 26 and the second front wheel bracket. 7 at the rear of the swivel connection;

The second sliding member 19, the second sliding member 19 can be slidably arranged on the second rear wheel support 13 along the length direction of the second rear wheel support 13;

The second connecting rod 17, the lower end of the second connecting rod 17 is rotationally connected with the second rear seat rod 27, the upper end of the second connecting rod 17 is connected with the second sliding Part 19 is rotationally connected;

A second limiting mechanism for limiting the rotation shafts of the second front seat post 26 and the second rear seat post 27 to move downward when the cart frame 1 is in the unfolded position, the The second limit mechanism includes a second limit member 31 fixedly connected to the second rear seat post 27, when the cart frame 1 is in the unfolded position, the second front seat post 26 The rear part is pressed on the second limiting member 31,

The bottom brace 20 is formed by intersecting the first bottom brace 21 and the second bottom brace 22 and being rotatably connected at the intersection. The front end of the first bottom brace 21 is connected to the The rear portion of the first front seat post 24 is rotatably arranged through the first rotary joint, and the rear end portion of the first bottom brace 21 and the rear portion of the second rear seat post 27 are via the fourth rotary joint. The front end of the second bottom brace 22 and the rear part of the second front seatpost 26 are arranged to rotate through the second rotation joint, and the rear of the second bottom brace 22 The end part and the rear part of the first rear seat post 25 are rotatably arranged through the third rotary joint;

The rear bracket 23 is arranged on the first rear wheel bracket 12, the second rear wheel bracket 13, the first slider 18, the On the second slider 19, the rear support frame 23 is formed by intersecting the first rear support bar 32 and the second rear support bar 33 and being connected in rotation by a rotating shaft at the intersection. The upper end of the strut 32 is set rotatably with the first slider 18, the lower end of the first rear strut 32 is rotatably set with the lower part of the second rear wheel bracket 13, and the The upper end of the second rear strut 33 is set rotatably with the second sliding member 19 , and the lower end of the second strut 33 is set rotatably with the lower part of the first rear wheel bracket 12 .

The locking device may be disposed between the first sliding member 18 and the first rear wheel bracket 12 , and between the second sliding member 19 and the second rear wheel bracket 13 . Fold the stroller frame 1, first unlock the locking device, then slide the first sliding member 18 and the second sliding member 19 upwards, under the action of the first connecting rod 16 and the second connecting rod 17, the first front seat The axis of rotation between the bar 24 and the first rear seat post 25 moves up, and the axis of rotation between the second front seat post 26 and the second rear seat post 27 moves up, so that the first front wheel support 6 and the second rear wheel support 12 are folded closer, the second front wheel bracket 7 and the second rear wheel bracket 13 are folded closer, the first push rod 8 slides downward relative to the first front wheel bracket 6, and the second push rod 9 is relatively The second front wheel bracket 7 described above slides downwards. At the same time, the rear bracket 23 and the bottom bracket 20 are folded, and the first front wheel bracket 6 and the second front wheel bracket 7 are folded close together. The second rear wheel bracket 12 and the Folding close between the second rear wheel brackets 13, after folding, the first front wheel assembly 2, the second front wheel assembly 3, the first rear wheel assembly 4, and the second rear wheel assembly 5 land on the ground to realize self-support. And the upper parts of the first push rod 8 and the second push rod 9 are still located at the top, which is convenient for the user to take.

Embodiment three, as shown in accompanying drawing 8-accompanying drawing 10, the difference between embodiment three and embodiment two is:

The first limiting member is arranged on the first front seatpost 24, the second limiting member 31 is arranged on the second front seatpost 26, and the stroller frame 1 is in In the unfolded position, the front part of the first rear seat post 25 presses on the first stopper, and the front part of the second rear seat post 27 presses on the second stopper 31 on.

The lower end of the first connecting rod 16 is provided with a first guide groove 42 along the front-rear direction, and a first pin 43 is fixed on the first rear seat post 25, and the first pin 43 is inserted into the In the first guide groove 42 mentioned above. The lower end of the second connecting rod 17 is provided with a second guide groove along the front and rear direction, and the second rear seat post 27 is fixed with a second pin, and the second pin is inserted into the first Two guide slots.

The lower end of the first connecting rod 16 has a third stopper 40, and the rear end of the first front seat post 24 is provided with a first elastic tongue 41, when the cart frame 1 is in the unfolded In the position, the third limiting member 40 presses on the first elastic tongue 41 . The lower end of the second connecting rod 17 has a fourth stopper, and the rear end of the second front seat post 26 is provided with a second elastic tongue, when the cart frame 1 is in the unfolded position, , the fourth limiting member presses on the second elastic tongue.

After the locking device is unlocked, the first sliding member 18 and the second sliding member 19 can be pulled up first, so that the first connecting rod 16 and the second connecting rod 17 are pulled up, and the first pin 43 is The first guide groove 42 slides, and the second pin slides in the second guide groove, so that the third limiting member 40 is separated from the first elastic tongue 41, and the fourth limiting member is separated from the first elastic tongue 41. Two elastic tongues, as in the second embodiment, the cart frame 1 is folded. When the stroller frame 1 is changed from the folded position to the unfolded position, under the elastic force of the first elastic tongue 41 and the second elastic tongue, the first elastic tongue 41 and the second elastic tongue will The second elastic tongue automatically enters below the third limiting member 40 and the fourth limiting member.

The orientation words such as front, back, up and down mentioned above are defined when the stroller frame 1 is in the unfolded position.

As mentioned above, we have fully described according to the purpose of the present invention, but the present invention is not limited to the above-mentioned embodiments and implementation methods. Practitioners in the relevant technical fields may make various changes and implementations within the scope permitted by the technical ideas of the present invention.

Claims (10)

1. doll carriage, comprise go-cart vehicle frame (1), the front component that is arranged on the front portion, the end of described go-cart vehicle frame (1), the wheel assembly that is arranged on the rear portion, the end of described go-cart vehicle frame (1) with expanded position and folding position, the blocking device that is used for described go-cart vehicle frame (1) is locked in expanded position, it is characterized in that: described go-cart vehicle frame (1) comprises

First front-wheel support (6);

First push rod (8), described first push rod (8) is provided with described first front-wheel support (6) mutually slidably along described first front-wheel support (6) length direction;

First rear wheel support (12), the upper end of described first rear wheel support (12) is connected rotatedly with the top of described first push rod (8);

The first front stall bar (24), the front portion of the described first front stall bar (24) is connected rotatedly with described first front-wheel support (6);

The first back seat bar (25), the rear portion of the described first back seat bar (25) is connected rotatedly with the bottom of described first rear wheel support (12), the described first front stall bar (24) is connected rotatedly with the described first back seat bar (25), and the place of being rotationally connected of described first front stall bar (24) and the described first back seat bar (25) is positioned at the rear at the place that is rotationally connected of described first front stall bar (24) and described first front-wheel support (6);

First sliding part (18), described first sliding part (18) can be slidingly arranged in along the length direction of described first rear wheel support (12) on described first rear wheel support (12);

First connecting rod (16), the bottom of described first connecting rod (16) connects mutually versatilely with the described first back seat bar (25), and the upper end of described first connecting rod (16) is connected rotatedly with described first sliding part (18);

The turning cylinder that is used to limit the described first front stall bar (24) and the described first back seat bar (25) is in first stop gear that moves down under the expanded position at described go-cart vehicle frame (1).

2. a kind of doll carriage according to claim 1 is characterized in that: the bottom of described first connecting rod (16) is connected rotatedly with the described first back seat bar (25).

3. a kind of doll carriage according to claim 1, it is characterized in that: the bottom of described first connecting rod (16) offers first guide groove (42) along fore-and-aft direction, be fixed with first pin (43) on the described first back seat bar (25), described first pin (43) is inserted in described first guide groove (42).

4. a kind of doll carriage according to claim 3, it is characterized in that: the bottom of described first connecting rod (16) has the 3rd locating part (40), the rearward end of the described first front stall bar (24) is provided with first and plays tongue (41), when described go-cart vehicle frame (1) is under the expanded position, described the 3rd locating part (40) is pressed in described first and plays on the tongue (41).

5. a kind of doll carriage according to claim 1, it is characterized in that: described first stop gear comprises first locating part (29) on that is fixedly connected in (25) two on the described first front stall bar (24) and the described first back seat bar, when described go-cart vehicle frame (1) is under the expanded position, another in two is pressed on described first locating part (29).

6. a kind of doll carriage according to claim 1 is characterized in that: described go-cart vehicle frame (1) also comprises

Second front-wheel support (7);

Second push rod (9), described second push rod (9) is provided with described second front-wheel support (7) mutually slidably along described second front-wheel support (7) length direction;

Second rear wheel support (13), the upper end of described second rear wheel support (13) is connected rotatedly with the top of described second push rod (9);

The second front stall bar (26), the front portion of the described second front stall bar (26) is connected rotatedly with described second front-wheel support (7);

The second back seat bar (27), the rear portion of the described second back seat bar (27) is connected rotatedly with the bottom of described second rear wheel support (13), the described second front stall bar (26) is connected rotatedly with the described second back seat bar (27), and the place of being rotationally connected of described second front stall bar (26) and the described second back seat bar (27) is positioned at the rear at the place that is rotationally connected of described second front stall bar (26) and described second front-wheel support (7);

Second sliding part (19), described second sliding part (19) can be slidingly arranged in along the length direction of described second rear wheel support (13) on described second rear wheel support (13);

Second connecting rod (17), the bottom of described second connecting rod (17) connects mutually versatilely with the described second back seat bar (27), and the upper end of described second connecting rod (17) is connected rotatedly with described second sliding part (19);

The turning cylinder that is used to limit the described second front stall bar (26) and the described second back seat bar (27) is in second stop gear that moves down under the expanded position at described go-cart vehicle frame (1);

The bottom bracing frame (20) that can fold, described bottom bracing frame (20) be by first bottom supporting rod (21) intersect with second bottom supporting rod (22) and infall rotate be connected constitute, described bottom bracing frame (20) is arranged at the rear portion of the described first front stall bar (24), the rear portion of the described second front stall bar (26), the rear portion of the described first back seat bar (25), on the rear portion of the described second back seat bar (27), perhaps be arranged at the rear portion of the described first front stall bar (24), the rear portion of the described second front stall bar (26), the bottom of described first rear wheel support (12), on the bottom of described second rear wheel support (13);

The back pole-bracket that can fold (23), described back pole-bracket (23) is arranged on described first rear wheel support (12) and described second rear wheel support (13), and perhaps described back pole-bracket (23) is arranged on the bottom, described first sliding part (18), described second sliding part (19) of bottom, described second rear wheel support (13) of described first rear wheel support (12).

7. a kind of doll carriage according to claim 6 is characterized in that: the bottom of described second connecting rod (17) is connected rotatedly with the described second back seat bar (27).

8. a kind of doll carriage according to claim 6, it is characterized in that: the bottom of described second connecting rod (17) offers second guide groove along fore-and-aft direction, be fixed with second pin on the described second back seat bar (27), described second pin is inserted in described second guide groove.

9. a kind of doll carriage according to claim 8, it is characterized in that: the bottom of described second connecting rod (17) has the 4th locating part, the rearward end of the described second front stall bar (26) is provided with second and plays tongue, when described go-cart vehicle frame (1) is under the expanded position, described the 4th locating part is pressed in described second and plays on the tongue.

10. a kind of doll carriage according to claim 6, it is characterized in that: described second stop gear comprises second locating part (31) on that is fixedly connected in (27) two on the described second front stall bar (26) and the described second back seat bar, when described go-cart vehicle frame (1) is under the expanded position, another in two is pressed on described second locating part (31).

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