CN102700593A - Infant stroller - Google Patents

Abstract

A baby stroller, comprising a first connecting piece, a second connecting piece rotatably connected to the first connecting piece, a left front bracket and a right front bracket respectively rotatably connected to the first connecting piece, and a left push rod frame rotatably connected to the left front bracket , the right push rod frame that is rotatably connected with the right front bracket, the push rod cross brace, the left underframe and the right underframe that are rotatably connected with the second connecting piece, the rear support frame, and the left front bracket and the right front bracket that are slidably arranged respectively Left slider vs. right slider, left armrest, right armrest. The push rod cross brace is folded horizontally, the left push rod frame and the right push rod frame can be overturned forward respectively, and the left armrest and the right armrest move forward respectively, so that the left sliding part and the right sliding part move along the left front bracket and the right front bracket respectively. Sliding forward, the horizontal folding of the rear support frame, the left front support and the right front support move closer, the left bottom frame and the right bottom frame move closer, and the left front support and the right front support move closer to the left bottom frame and the right bottom frame respectively.

Description

a baby stroller

technical field

The invention relates to a stroller for infants.

Background technique

A baby stroller in the prior art includes 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 front of the stroller frame The rear wheel assembly at the rear part of the bottom, the whole vehicle locking mechanism for locking the cart frame in the unfolded position, and the human body accommodation device arranged on the cart frame. There are many types of existing trolley frames, the number of rods of the cart frame is different, and the connection relationship and connection position between the rods are different, so the folding principles and folding methods are different.

Contents of the invention

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

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is: a stroller for infants, including a stroller frame with an unfolded position and a folded position; The human body containment device, the front wheel assembly, the rear wheel assembly, and the vehicle locking mechanism for locking the cart frame in the unfolded position, the cart frame includes:

first connector;

the second connecting piece, the first connecting piece is rotationally connected to the second connecting piece through a first rotating shaft, and the first rotating shaft extends along the left-right direction;

a left front bracket, the front part of the left front bracket is rotatably connected to the first connecting piece;

a right front bracket, the front part of the right front bracket is rotatably connected to the first connecting piece;

The left push rod frame, the front part of the left push rod frame is rotationally connected with the rear part of the left front bracket through the eleventh rotating shaft, and the eleventh rotating shaft extends along the left-right direction;

The right push rod frame, the front part of the right push rod frame is rotationally connected with the rear part of the right front bracket through the twelfth rotating shaft, and the twelfth rotating shaft extends along the left-right direction, and the When the cart frame is in the unfolded position, the left push rod frame is far away from the right push rod frame, and when the cart frame is in the folded position, the left push rod frame and the The right push rod frame is close to each other;

The folded push rod cross brace can be folded horizontally, and the push rod cross brace is arranged between the left push rod frame and the right push rod frame;

a left underframe, the front part of the left underframe is rotatably connected to the second connecting piece;

The right bottom frame, the front part of the right bottom frame is rotatably connected with the second connecting piece, when the cart frame is in the unfolded position, the left bottom frame and the right bottom frame The bottom frames are far away from each other, and when the cart frame is in the folded position, the left bottom frame and the right bottom frame are close together;

a left slider, the left slider is slidably arranged on the left front bracket along the front-to-back direction of the left front bracket;

a right sliding piece, the right sliding piece is slidably arranged on the right front bracket along the front-to-back direction of the right front bracket;

The left armrest, the front part of the left armrest is rotatably arranged with the left slider, and the rear part of the left armrest is rotatably connected with the left push rod frame through the thirteenth rotating shaft, so The thirteenth rotating shaft described above extends along the left-right direction;

The right handrail, the front part of the right handrail is rotatably arranged with the said right slider, and the rear part of the right handrail is rotatably connected with the right push rod frame through the fourteenth rotating shaft, so The fourteenth rotating shaft described above extends along the left-right direction;

A rear support that can be folded horizontally, the rear support is formed by intersecting the first rear support and the second rear support and pivotally connected at the intersection, the upper part of the first rear support Set in rotation with the right slider, the lower part of the first rear strut is set in rotation with the left chassis, the upper part of the second rear strut is in contact with the left slider The lower part of the second rear strut is set in rotation with the right underframe.

In some embodiments, the left sliding part is rotatably connected with the left armrest seat through the fifteenth rotating shaft, and the front part of the left armrest is connected to the left armrest seat through the seventeenth rotating shaft. Rotationally connected, the fifteenth rotating shaft and the seventeenth rotating shaft extend along the left and right directions respectively; the right armrest seat is rotationally connected to the right slider through the sixteenth rotating shaft, and the right armrest The front part of and the right armrest seat are rotationally connected through the eighteenth rotating shaft, the sixteenth rotating shaft and the eighteenth rotating shaft extend along the left and right directions respectively, and the left armrest A front armrest frame capable of being folded laterally is arranged between the seat and the right armrest seat.

In some embodiments, the front portion of the left armrest is pivotally connected to the left slider, and the front portion of the right armrest is pivotally connected to the right slider.

In some embodiments, the push rod cross brace includes a first push rod strut that is rotatably connected to the left push rod frame at one end through a third rotating shaft, and a first push rod stay that is connected to the right push rod at one end. The second push rod stay that is rotatably connected to the frame through the fourth rotating shaft, the other end of the first push rod stay and the other end of the second push rod stay rotate through the fifth rotating shaft ground connection.

In some embodiments, the front part of the left front bracket is rotationally connected with the front part of the right front bracket and the first connecting member via a second rotating shaft.

In some embodiments, the front part of the left underframe, the front part of the right underframe and the second connecting member are rotatably connected through a sixth rotating shaft.

In some embodiments, the upper part of the first rear strut is rotatably connected to the right slider through the seventh shaft, and the lower part of the first rear strut is connected to the left chassis through The tenth shaft is rotationally connected, the upper part of the second rear strut is rotationally connected with the left slider through the eighth rotational shaft, the lower part of the second rear strut is connected with the right bottom The frame is rotatably connected by the ninth rotating shaft.

In some embodiments, the front wheel assembly is arranged at the lower part of the second connecting member, the rear wheel assembly includes a left rear wheel assembly and a right rear wheel assembly, and the left rear wheel assembly is arranged At the rear of the left chassis, the right rear wheel assembly is arranged at the rear of the right chassis.

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

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, a technical solution 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 technical solutions, the present invention has the following advantages compared with the prior art: when the vehicle locking mechanism is unlocked, the push rod cross brace can be folded horizontally, and the left push rod frame and the right push rod frame can be turned forward respectively , the left armrest and the right armrest move forward respectively, so that the left slider and the right slider slide forward along the left front bracket and the right front bracket respectively, the rear bracket is folded horizontally, the left front bracket and the right front bracket move closer together, and the left bottom bracket Close to the right underframe, and the left front support and the right front support are relatively close to the left underframe and the right underframe respectively, and the whole vehicle is folded.

Description of drawings

Accompanying drawing 1 is the three-dimensional view that the cart frame is in the deployed position;

Accompanying drawing 2 is the side view of the cart frame in the unfolded position;

Accompanying drawing 3 is the perspective view of the cart frame in the folded position;

Accompanying drawing 4 is the side view of the cart frame in the folded position;

Among them: 1. Cart frame; 2. Front wheel assembly; 3. Left rear wheel assembly; 4. Right rear wheel assembly; 10. Push rod cross brace; 11. First connecting piece; 12. Second connecting piece; 13. Left front bracket; 14. Right front bracket; 15. Left push rod frame; 16. Right push rod frame; 17. Left bottom frame; 18. Right bottom frame; 19. Rear support frame; 21. First push rod brace 22, the second push rod strut; 23, the first rear strut; 24, the second rear strut; 25, the first connecting part; Four connecting parts; 31, the first rotating shaft; 32, the second rotating shaft; 33, the third rotating shaft; 34, the fourth rotating shaft; 35, the fifth rotating shaft; 36, the sixth rotating shaft; 37, the seventh rotating shaft; 38, the eighth Revolving axis; 39, ninth revolving axis; 40, tenth revolving axis; 41, eleventh revolving axis; 42, twelfth revolving axis; 43, thirteenth revolving axis; 44, fourteenth revolving axis; 45, fifteenth revolving axis; 46 , the sixteenth rotating shaft; 47, the seventeenth rotating shaft; 48, the eighteenth rotating shaft; 51, the left sliding part; 52, the right sliding part; 53, the left armrest; 54, the right armrest; 55, the left armrest seat; 56, Right armrest.

Detailed ways

As shown in the accompanying drawings, a baby stroller includes a stroller frame 1 with an unfolded position and a folded position, a human body receiving device for supporting a human body arranged on the stroller frame 1, a front wheel assembly 2, The rear wheel assembly and the vehicle locking mechanism are used to lock the cart frame 1 in the deployed position.

The human body containment device is not shown in the figure. The human body containment device can be a child's seat, a child's sleeping basket, a child's car seat, etc. The installation method can be fixed or disassembled. The human body receiving device can be arranged between the upper part of the left front bracket 13 and the upper part of the right front bracket 14 mentioned below, or can be arranged between the left sliding part 51 and the right sliding part 52 . Or directly be the seat cloth pocket formed between the left front bracket 13, the right front bracket 14, the left push rod frame 15 and the right push rod frame 16.

Cart frame 1 includes:

the first connector 11;

The second connecting member 12 is rotatably connected between the first connecting member 11 and the second connecting member 12 through a first rotating shaft 31, and the first rotating shaft 31 extends along the left-right direction;

Left front bracket 13, the front part of left front bracket 13 is connected with the first connecting member 11 in a rotational manner;

Right front bracket 14, the front part of right front bracket 14 is connected with the first connecting member 11 in a rotational manner;

Left push rod frame 15, the front portion of left push rod frame 15 is connected with the rear portion of left front bracket 13 through the eleventh rotating shaft 41 to rotate, and the eleventh rotating shaft 41 extends along the left-right direction;

Right push rod frame 16, the front portion of right push rod frame 16 is connected with the rear portion of right front bracket 14 through the twelfth rotating shaft 42 to rotate, and the twelfth rotating shaft 42 extends along the left-right direction, and the cart frame 1 is in the unfolded state. position, the left push rod frame 15 is far away from the right push rod frame 16, and the left front frame 13 is also far away from the right front frame 14. When the cart frame 1 is in the folded position, the left push rod frame 15 and the right push rod frame 16 Close to each other, the left front bracket 13 and the right front bracket 14 are also close together;

The push rod cross brace 10 that can be folded horizontally is arranged between the left push rod frame 15 and the right push rod frame 16. The push rod cross brace 10 can be as in this embodiment, including the first push rod Rod strut 21, the second push rod strut 22, when the cart vehicle frame 1 is in the unfolded position, the push rod cross brace 10 becomes a rigid part, so that the left push rod frame 15 and the right push rod frame 16 can be connected to each other. In the present embodiment, one end of the first push rod stay 21 is rotationally connected with the left push rod frame 15 through the third rotating shaft 33, and one end of the second push rod stay 22 is connected with the right push rod frame 16 is rotatably connected by the fourth rotating shaft 34, the structure is simple, and the rigidity is better, and one end of the first push rod strut 21 and the left push rod frame 15 can be rotated and arranged through a ball joint and a rotating joint, and the same Yes, one end of the second push rod strut 22 and the right push rod frame 16 may be ball joints or rotary joints to rotate. The push rod cross brace 10 can also be in another structure, such as sliding parts respectively arranged on the left push rod frame 15 and the right push rod frame 16, the push rod cross brace includes two crosses and is pivotally connected at the intersection The front ends of the two rods are respectively connected to the two slides in rotation, and the rear ends of the two rods are respectively connected to the corresponding two left push rod frames 15 and the right push rod frames 16 in a rotational manner;

The left underframe 17, the front part of the left underframe 17 is rotatably connected with the second connecting member 12;

The right underframe 18, the front part of the right underframe 18 is connected with the second connecting member 12 in rotation, when the trolley frame 1 is in the unfolded position, the left underframe 17 is far away from the right underframe 18, when the trolley When the frame 1 is in the folded position, the left bottom frame 17 and the right bottom frame 18 are close together;

A left sliding part 51, the left sliding part 51 is slidably arranged on the left front bracket 13 along the front-rear direction of the left front bracket 13;

The right sliding part 52, the right sliding part 52 is arranged on the right front bracket 14 so as to slide along the front and rear direction of the right front bracket 14;

Left armrest 53, the front portion of left armrest 53 is arranged to be rotatable with left slider 51, and the rear portion of left armrest 53 is rotatably connected with left push rod frame 15 through the thirteenth rotating shaft 43, and the thirteenth rotating shaft 43 is along Extend left and right;

Right armrest 54, the front portion of right armrest 54 is provided with the right sliding member 52 in rotation, and the rear portion of right armrest 54 is connected with right push rod frame 16 in rotation through the fourteenth rotating shaft 44, and the fourteenth rotating shaft 44 is along Extend left and right;

The rear brace 19 that can be folded horizontally, the rear brace 19 is formed by intersecting the first rear brace 23 and the second rear brace 24 and being pivotally connected at the intersection, the upper part of the first rear brace 23 and the second rear brace 24 The right slider 52 is set in rotation, the lower part of the first rear stay 23 is set in rotation with the left chassis 17, the upper part of the second rear stay 24 is set in rotation with the left slider 51, and the second rear stay 24 The lower part of the bottom frame is set to rotate with the right underframe 18, specifically, as shown in Figure 1, in this embodiment, the second connecting part 26 is fixed on the left slider 51, and the right slider 52 is fixed with The first connecting part 25, the upper part of the first rear strut 23 and the first connecting part 25 on the right slider 52 are connected in a rotational manner through the seventh rotating shaft 37, and the fourth connecting part 28 is fixed on the left underframe 17. The lower part of a rear strut 23 is rotatably connected with the fourth connecting part 28 through the tenth rotating shaft 40 , and the upper part of the second rear strut 24 is rotatably connected with the second connecting part 26 on the left slider 51 through the eighth rotating shaft 38 The third connecting portion 27 is fixed on the right underframe 18 , and the lower part of the second rear strut 24 is connected to the third connecting portion 27 through the ninth rotating shaft 39 in a rotatable manner. Better rigidity. Also can be another kind of structure, not shown in the figure, as the upper part of the first rear strut 23 and the right sliding member 52 can be set by ball joint or two-way rotation joint, the bottom left bottom of the first rear strut 23 The frame 17 is arranged to rotate through a ball joint or a two-way rotating joint. The upper part of the second rear strut 24 and the left slider 51 can be set to rotate through a ball joint or a two-way rotating joint. The bottom of the second rear strut 24 is connected to the The right bottom frame 18 can be rotatably arranged through a ball joint or a two-way rotating joint.

The left slider 51 is rotatably connected with the left armrest seat 55 through the fifteenth rotating shaft 45, and the front part of the left armrest 53 is connected with the left armrest seat 55 through the seventeenth rotating shaft 47, and the fifteenth rotating shaft 45 is connected with the seventeenth rotating shaft. The rotating shafts 47 extend along the left and right directions respectively; the right slider 52 is rotatably connected with a right armrest seat 56 through the sixteenth rotating shaft 46, and the front part of the right armrest 54 is rotationally connected with the right armrest seat 56 through the eighteenth rotating shaft 48, The sixteenth rotating shaft 46 and the eighteenth rotating shaft 48 respectively extend along the left and right directions. Between the left armrest seat 55 and the right armrest seat 56 is provided a front armrest frame which can be folded laterally. The specific structure of the front armrest frame is not the gist of the present invention, as long as it can be folded horizontally, it can be as in the body embodiment, formed by pivotal connection between multiple connecting rods, or it can be formed by using soft plasticity. The performance of elastic deformation is made into an integral plastic part, and after the cart frame 1 is folded, the front armrest frame can also be folded horizontally. And when the stroller frame 1 is being folded, the front armrest frame moves closer to the left front bracket 13 and the right front bracket 14 through the left armrest seat 55 and the right armrest seat 56, so as to further reduce the folded volume.

If the problem of folding the front armrest frame to the left front bracket 13 and the right front bracket 14 is not considered, it is also possible to directly pivot the front part of the left armrest 53 to the left sliding part 51, and the front part of the right armrest 54 to the right sliding part 52. Direct pivot connection.

The first connecting piece 11 is located above the front of the second connecting piece 12 .

The whole vehicle locking mechanism is not the design point of the present invention, as long as it can lock the cart frame 1 in the unfolded position. For example, it can be arranged on the push rod cross brace 10 to prohibit its horizontal folding, and/or between the left push rod frame 15 and the left front bracket 13, and/or between the right push rod frame 16 and the right front bracket 14. and/or between the left slider 51 and the left front bracket 13, and/or between the right slider 52 and the right front bracket 14, and/or between the first rear brace 23 and the second rear brace Between rods 24 etc.

The front portion of the left front bracket 13 and the front portion of the right front bracket 14 are rotatably connected with the first connector 11 by a shaft that is the second rotating shaft 32, and the front portion of the left front bracket 13 and the front portion of the right front bracket 14 are respectively connected with the first connecting member 11. It is also possible for the member 11 to be pivotally connected. The second rotating shaft 32 , the third rotating shaft 33 , the fourth rotating shaft 34 and the fifth rotating shaft 35 are parallel to each other. The front part of the left base frame 17, the front part of the right base frame 18 and the second connecting member 12 are rotatably connected through the sixth rotating shaft 36 extending along the vertical direction. Similarly, the front part of the left bottom frame 17 and the front part of the right bottom frame 18 are pivotally connected to the second connecting member 12 respectively, that is, two rotating shafts are also possible.

The front wheel assembly 2 is arranged on the bottom of the second connector 12, and the rear wheel assembly includes a left rear wheel assembly 3 and a right rear wheel assembly 4. The left rear wheel assembly 3 is arranged on the rear portion of the left chassis 17, and the right rear wheel assembly 4 It is arranged on the rear portion of the right underframe 18.

With regard to the push rod 10 , the other end portion of the first push rod stay 21 is arranged to rotate relative to the other end portion of the second push rod stay 22 . This place is set to be rotated, which can be an indirect rotational connection through an intermediate connecting piece, or it can be like in this embodiment, the other end of the first push rod stay 21 is directly connected to the other end of the second push rod stay 22. It is rotationally connected via a fifth shaft 35 . The third rotating shaft 33 , the fourth rotating shaft 34 and the fifth rotating shaft 35 are parallel to each other.

As shown in accompanying drawing 1, front wheel assembly 2 is arranged on the bottom of second connector 12, and rear wheel assembly comprises left rear wheel assembly 3, right rear wheel assembly 4, and left rear wheel assembly 3 is arranged on the back of left chassis 17 The right rear wheel assembly 4 is arranged on the rear portion of the right underframe 18 .

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 (8)

1. A baby stroller, comprising a stroller frame (1) with an unfolded position and a folded position, a human body accommodation device for supporting a human body arranged on the stroller frame (1), and a front wheel assembly (2) Rear wheel assembly, vehicle locking mechanism for locking the cart frame (1) in the deployed position, characterized in that: the cart frame (1) includes: first connecting piece (11); The second connecting piece (12), the first connecting piece (11) and the second connecting piece (12) are rotationally connected through the first rotating shaft (31), and the first rotating shaft ( 31) Extend along the left and right direction; The left front bracket (13), the front part of the left front bracket (13) is rotatably connected to the first connecting piece (11); the right front bracket (14), the front part of the right front bracket (14) is rotatably connected with the first connecting piece (11); The left push rod frame (15), the front part of the left push rod frame (15) is rotationally connected with the rear part of the left front bracket (13) through the eleventh rotating shaft (41), and the first The eleven rotating shafts (41) extend along the left and right directions; The right push rod frame (16), the front part of the right push rod frame (16) is rotationally connected with the rear part of the right front bracket (14) through the twelfth rotating shaft (42), and the first Twelve rotating shafts (42) extend along the left and right directions, the cart frame (1) is in the unfolded position, and the left push rod frame (15) is far away from the right push rod frame (16) , when the cart frame (1) is in the folded position, the left push rod frame (15) is close to the right push rod frame (16); The push rod cross brace (10) that can be folded horizontally, the push rod cross brace (10) is arranged between the left push rod frame (15) and the right push rod frame (16); The left underframe (17), the front part of the left underframe (17) is rotatably connected with the second connecting piece (12); The right bottom frame (18), the front part of the right bottom frame (18) is rotatably connected with the second connecting piece (12), when the cart frame (1) is in the unfolded position , the left chassis (17) is far away from the right chassis (18), when the cart frame (1) is in the folded position, the left chassis (17) and the The above-mentioned right underframe (18) draws closer; A left slider (51), the left slider (51) is slidably arranged on the left front bracket (13) along the front-to-back direction of the left front bracket (13); A right sliding piece (52), the right sliding piece (52) is slidably arranged on the right front bracket (14) along the front-to-back direction of the right front bracket (14); The left armrest (53), the front part of the left armrest (53) and the left slider (51) are set in rotation, the rear part of the left armrest (53) is connected with the left push rod The frame (15) is rotationally connected by a thirteenth rotating shaft (43), and the thirteenth rotating shaft (43) extends along the left-right direction; The right armrest (54), the front part of the right armrest (54) is set in rotation with the right sliding part (52), the rear part of the right armrest (54) is connected with the right push rod The frame (16) is rotationally connected by a fourteenth rotating shaft (44), and the fourteenth rotating shaft (44) extends along the left-right direction; A rear brace (19) that can be folded horizontally, the rear brace (19) is composed of a first rear brace (23) and a second rear brace (24) crossed and pivotally connected at the intersection Yes, the upper part of the first rear strut (23) is set in rotation with the right slider (52), the lower part of the first rear strut (23) is the left chassis ( 17) set in rotation, the upper part of the second rear strut (24) is set in rotation with the left slider (51), the lower part of the second rear strut (24) is in contact with the The above-mentioned right underframe (18) is rotatably arranged. 2. A baby stroller according to claim 1, characterized in that: said left sliding part (51) is rotatably connected with a left armrest seat (55) through a fifteenth rotating shaft (45), said The front part of the left armrest (53) is rotationally connected with the left armrest seat (55) through the seventeenth rotating shaft (47), and the fifteenth rotating shaft (45) is connected with the tenth rotating shaft The seven rotating shafts (47) respectively extend along the left and right directions; the right sliding part (52) is connected with the right armrest seat (56) through the rotation of the sixteenth rotating shaft (46), and the front of the right armrest (54) and the right armrest seat (56) through the eighteenth shaft (48), the sixteenth shaft (46) and the eighteenth shaft (48) are respectively Extending in the left-right direction, a front armrest frame that can be folded horizontally is arranged between the left armrest seat (55) and the right armrest seat (56). 3. A stroller for infants according to claim 1, characterized in that: the front part of the left armrest (53) is pivotally connected with the left slider (51), and the right armrest The front portion of (54) is pivotally connected to said right slider (52). 4. A baby stroller according to claim 1, characterized in that: said push rod cross brace (10) includes one end and said left push rod frame (15) through a third rotating shaft (33) The first push rod stay (21) that is rotatably connected, the second push rod stay (22) that is rotatably connected with the right push rod frame (16) at one end through the fourth rotating shaft (34), The other end of the first push rod strut (21) is rotationally connected with the other end of the second push rod strut (22) through a fifth rotating shaft (35). 5. A baby stroller according to claim 1, characterized in that: the front part of the left front bracket (13) and the front part of the right front bracket (14) and the first connecting piece (11) are rotatably connected through the second rotating shaft (32). 6. A baby stroller according to claim 1, characterized in that: the front part of the left underframe (17), the front part of the right underframe (18) and the second The connecting piece (12) is rotatably connected through the sixth rotating shaft (36). 7. A baby stroller according to claim 1, characterized in that: the upper part of the first rear support rod (23) is in contact with the right slider (52) through the seventh rotating shaft (37). Rotationally connected, the lower part of the first rear strut (23) is rotationally connected to the left chassis (17) through the tenth rotating shaft (40), and the second rear strut (24) The upper part is rotationally connected with the left slider (51) via the eighth shaft (38), and the lower part of the second rear support (24) is connected with the right chassis (18) via the ninth shaft (39) are connected in rotation. 8. A baby stroller according to claim 1, characterized in that: said front wheel assembly (2) is arranged at the lower part of said second connecting piece (12), and said rear wheel assembly includes Left rear wheel assembly (3), right rear wheel assembly (4), the left rear wheel assembly (3) is arranged at the rear of the left chassis (17), the right rear wheel assembly (4 ) is arranged on the rear part of the right underframe (18).

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