CN211918899U

CN211918899U - Three-wheeled baby carriage

Info

Publication number: CN211918899U
Application number: CN202020436448.9U
Authority: CN
Inventors: 郑振极; 涂桥
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-11-13
Anticipated expiration: 2030-03-30

Abstract

The utility model discloses a three-wheeled bassinet, the support frame front side is connected with preceding support frame, be connected with the steering assembly on the preceding support frame, the back stay subassembly includes left supporting part and right supporting part, left supporting part includes left back leg and left rear wheel, left back leg upper end is around third axis and fourth axis and support frame rotatable coupling, when left back leg rotates around the third axis, left back wheel can move to be close to the plane of symmetry position from keeping away from the plane of symmetry position, when left back leg rotates around the fourth axis, left back wheel can move to be close to the front wheel position from keeping away from the front wheel position; the right supporting portion comprises a right rear leg and a right rear wheel, the upper end of the right rear leg is rotatably connected with the supporting frame around a fifth axis and a sixth axis, the right rear wheel can move to a position close to the symmetry plane from a position far away from the symmetry plane when the right rear leg rotates around the fifth axis, and the right rear wheel can move to a position close to the front wheel from a position far away from the front wheel when the right rear wheel rotates around the sixth axis. The utility model discloses simple structure, folding back occupation space is little.

Description

Three-wheeled baby carriage

[ technical field ] A method for producing a semiconductor device

The utility model relates to a three-wheeled bassinet.

[ background of the invention ]

Three-wheeled strollers have become a common product used by children during their growth. The three-wheeled bassinet on the market at present can be folded for convenient carrying or storage, but the three-wheeled bassinet on the market at present still has the problem of large volume after being folded, occupies large space and still has improved space.

Therefore, the present invention is based on the above disadvantages.

[ Utility model ] content

The utility model aims at overcoming the defects of the prior art, and providing a three-wheel baby carrier which has simple structure, convenient folding operation and small occupied space after folding.

The utility model discloses a realize through following technical scheme:

a three-wheeled buggy having a vertical plane of symmetry SP and being movable from an unfolded position to a folded position, characterized in that: including the support frame 1 that is used for supporting the seat, support frame 1 front side be connected with can be relative it around first axis A pivoted preceding strut 2, preceding strut 2 on be connected with and turn to the subassembly 3, turn to subassembly 3 including can be relative preceding strut 2 around second axis B pivoted rotating turret 31, rotating turret 31 lower extreme be equipped with front wheel 32, rotating turret 31 upper end be connected with and turn to 33, support frame 1 rear side be connected with the back-support subassembly, the back-support subassembly including setting up left portion 41 and the right branch portion 42 in symmetry plane SP both sides, left portion 41 include left back leg 411 and establish the left rear wheel 412 at left back leg 411 lower extreme, left back leg 411 upper end around third axis C and fourth axis D and support frame 1 rotatable coupling, when left back leg rotates around third axis C, left back wheel 412 can be from keeping away from symmetry plane SP position and moving to being close to symmetry plane SP position, the left rear wheel 412 is movable from a position away from the front wheel 32 to a position close to the front wheel 32 when the left rear leg 411 rotates about the fourth axis D; the right supporting portion 42 comprises a right rear leg 421 and a right rear wheel 422 arranged at the lower end of the right rear leg 421, the upper end of the right rear leg 421 is rotatably connected with the supporting frame 1 around a fifth axis E and a sixth axis F, the right rear wheel 422 can move from a position far away from the symmetry plane SP to a position close to the symmetry plane SP when the right rear leg 421 rotates around the fifth axis E, and the right rear wheel 422 can move from a position far away from the front wheel 32 to a position close to the front wheel 32 when the right rear wheel 422 rotates around the sixth axis F.

The three-wheeled baby carriage is characterized in that: the fourth axis D and the sixth axis F are perpendicular to the symmetry plane SP.

The three-wheeled baby carriage is characterized in that: the support frame 1 is also internally provided with a transmission mechanism 5 which is connected with the front support frame 2 and the rear support assembly and can enable the front support frame 2 and the rear support assembly to be linked.

The three-wheeled baby carriage is characterized in that: the front support frame 2 is rotatably connected with the front side of the support frame 1 around the first axis A through a front rotating seat 21, the transmission mechanism 5 comprises a rack 51 which is arranged in the support frame 1 and can slide in the support frame 1, a left rotating body 52 which can be meshed with the rack 51 and can rotate around a fourth axis D, and a right rotating body 53 which can rotate around a sixth axis F, the left rotating body 52 is connected with a left rear leg 411 and can rotate around the fourth axis D together with the upper end of the left rear leg 411, the right rotating body 53 is connected with a right rear leg 421 and can rotate around the sixth axis F together with the upper end of the right rear leg 421, a transmission rod 54 is connected to the front rotating seat 21 at a position deviating from the first axis A, one end of the transmission rod 54 is rotatably connected with the front rotating seat 21 around a seventh axis G, and the other end is rotatably connected with the rack 51 around an eighth axis H.

The three-wheeled baby carriage is characterized in that: a left swinging body 413 is fixedly connected to the upper end of the left rear leg 411, the left swinging body 413 and the left rotating body 52 are rotatably connected around a third axis C and can rotate around the third axis C relative to the left rotating body 52, and the left swinging body 413 and the left rotating body 52 can rotate around a fourth axis D together; a right swinging member 423 is fixedly connected to an upper end of the right rear leg 421, the right swinging member 423 is rotatably connected to the right rotating member 53 about a fifth axis E and is rotatable about a fifth axis E with respect to the right rotating member 53, and the right swinging member 423 is rotatable about a sixth axis F together with the right rotating member 53.

The three-wheeled baby carriage is characterized in that: the left swinging body 413 and the left rotating body 52 are provided with a left locking device used for locking the left swinging body 413 and the left rotating body 52 in a unfolding state of the three-wheeled baby carrier, the left locking device comprises a left locking groove 61 arranged on the left swinging body 413, a left sliding block 62 capable of sliding in the supporting frame 1 is arranged in the supporting frame 1, a left locking block 63 capable of being clamped with the left locking groove 61 is arranged on the left sliding block 62, a left push rod 64 capable of pushing the left locking block 63 out of the left locking groove 61 is arranged in the left swinging body 413 in a penetrating mode, a reset spring 65 capable of pushing the left sliding block 62 to reset is arranged in the supporting frame 1, one end of the left sliding block 62 abuts against the left swinging body 413, the other end of the left sliding block abuts against the reset spring 65, and a left pushing component 66 which is exposed and can push the left push rod 64 is further arranged on the.

The three-wheeled baby carriage is characterized in that: a right locking device for locking the right swinging body 423 and the right rotating body 53 when the three-wheeled baby carriage is in an unfolded state is arranged between the right swinging body 423 and the right rotating body 53, the right locking device comprises a right locking groove 71 arranged on the right swinging body 423, a right sliding block 72 capable of sliding in the supporting frame 1 is arranged in the supporting frame, a right locking block 73 capable of being clamped with the right locking groove 71 is arranged on the right sliding block 72, a right push rod 74 capable of pushing the right locking block 73 out of the right locking groove 71 penetrates through the right swinging body 423, one end of the right sliding block 72 abuts against the right swinging body 423, the other end of the right sliding block abuts against the reset spring 65, and a right pushing component 76 which is exposed and can push the right push rod 74 is also arranged on the right rear leg 421.

The three-wheeled baby carriage is characterized in that: the left pushing member 66 includes a left button 661 disposed at the upper end of the left rear leg 411 and capable of pushing the left push rod 64 to slide, and the right pushing member 76 includes a right button 761 disposed at the upper end of the right rear leg 421 and capable of pushing the right push rod 74 to slide.

The three-wheeled baby carriage is characterized in that: the left swinging body 413 is also provided with a left inner spring 67 which can push the left push rod 64 to reset, and the right swinging body 423 is also provided with a right inner spring 77 which can push the right push rod 74 to reset.

The three-wheeled baby carriage is characterized in that: the fourth axis D and the sixth axis F are coincided in a collinear way, and in the unfolded state of the three-wheeled baby carrier, the third axis C and the fifth axis E form acute angles with the vertical plane VP.

Compared with the prior art, the utility model discloses there is following advantage:

1. the utility model discloses the tricycle bassinet is when folding, and left rear leg can rotate and make left rear wheel remove to being close to the symmetry plane position from keeping away from the symmetry plane position around the third axis to right rear leg can rotate and make right rear wheel remove to being close to the symmetry plane position from keeping away from the symmetry plane position around the fifth axis, makes the size of horizontal direction can reduce about the tricycle bassinet. In addition, the front support frame can rotate around the first axis, and then the left rear leg is combined to rotate around the fourth axis to enable the left rear wheel to be close to the front wheel, and the right rear leg is combined to rotate around the sixth axis to enable the right rear wheel to be close to the front wheel, so that the size of the three-wheel baby carrier in the height direction can be reduced. Therefore, through the series of rotating actions, the volume of the folded three-wheeled baby carriage is further reduced, the occupied space after folding is reduced, and the carrying and the storage are more convenient.

2. The utility model discloses a drive mechanism sets up inside the support frame, drive mechanism is more hidden, make tricycle bassinet overall structure compacter, drive mechanism makes preceding strut and back support subassembly link to each other, and enable the rotation action of preceding relative support frame of strut and the rotation action of the relative support frame of back support subassembly through drive mechanism and form the linkage, also just also any relative support frame between the two of preceding strut and back support subassembly rotates and just can drive another relative support frame and rotate, thereby it is more convenient to make the tricycle bassinet fold.

3. The utility model discloses simple structure, folding operation convenience very, folding back is small, portable and deposit, is fit for popularizing and applying.

[ description of the drawings ]

FIG. 1 is a perspective view of the present invention;

FIG. 2 is one of the perspective views of the components of the present invention;

fig. 3 is an exploded view of components of the present invention;

fig. 4 is a second perspective view of components of the present invention;

fig. 5 is a third perspective view of the components of the present invention;

fig. 6 is a top view of the present invention in a fully deployed state;

FIG. 7 is a side view of the components of the present invention in the deployed state;

FIG. 8 is a partial cross-sectional view taken along line W-W of FIG. 7;

fig. 9 is a top view of the present invention with the left and right rear wheels near the plane of symmetry;

fig. 10 is a side view of the present invention with the left and right rear wheels near the plane of symmetry;

fig. 11 is a partial cross-sectional view of the present invention with the left and right rear wheels near the plane of symmetry;

fig. 12 is one of the side views during the folding process of the present invention;

fig. 13 is a side view of the present invention in a folded state;

fig. 14 is one of the schematic diagrams of the approach of the left and right rear wheels to the front wheel of the present invention;

fig. 15 is a second schematic diagram of the left rear wheel and the right rear wheel of the present invention during approaching the front wheel;

fig. 16 is a perspective view of a component of the present invention.

[ detailed description ] embodiments

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1 to 13, a three-wheeled stroller having a vertical symmetry plane SP and capable of moving from an unfolded position to a folded position comprises a support frame 1 for supporting a seat, wherein a front support frame 2 capable of rotating around a first axis a relative to the support frame 1 is connected to the front side of the support frame 1, a steering assembly 3 is connected to the front support frame 2, the steering assembly 3 comprises a rotating frame 31 capable of rotating around a second axis B relative to the front support frame 2, a front wheel 32 is arranged at the lower end of the rotating frame 31, a steering handle 33 is connected to the upper end of the rotating frame 31, a rear support assembly is connected to the rear side of the support frame 1, the rear support assembly comprises a left support portion 41 and a right support portion 42 arranged at two sides of the symmetry plane SP, the left support portion 41 comprises a left rear leg 411 and a left rear wheel 412 arranged at the lower end of the left rear leg 411, the upper end of the left rear leg is rotatably connected to the support frame 1 around a third axis C and a fourth axis D, the left rear wheel 412 is movable from a position away from the symmetry plane SP to a position close to the symmetry plane SP when the left rear leg 411 rotates about the third axis C, and the left rear wheel 412 is movable from a position away from the front wheel 32 to a position close to the front wheel 32 when the left rear leg 411 rotates about the fourth axis D; the right supporting portion 42 comprises a right rear leg 421 and a right rear wheel 422 arranged at the lower end of the right rear leg 421, the upper end of the right rear leg 421 is rotatably connected with the supporting frame 1 around a fifth axis E and a sixth axis F, the right rear wheel 422 can move from a position far away from the symmetry plane SP to a position close to the symmetry plane SP when the right rear leg 421 rotates around the fifth axis E, and the right rear wheel 422 can move from a position far away from the front wheel 32 to a position close to the front wheel 32 when the right rear wheel 422 rotates around the sixth axis F. When the three-wheeled stroller is folded, the left rear leg 411 can rotate around the third axis C to move the left rear wheel 412 from the position far from the symmetry plane SP to the position close to the symmetry plane SP, and the right rear leg 421 can rotate around the fifth axis E to move the right rear wheel 422 from the position far from the symmetry plane SP to the position close to the symmetry plane SP, so that the size of the three-wheeled stroller in the left-right transverse direction can be reduced. In addition, the front support frame 2 can rotate around the first axis A, and then the left rear leg 411 rotates around the fourth axis D to enable the left rear wheel 412 to be close to the front wheel 32, and the right rear leg 421 rotates around the sixth axis F to enable the right rear wheel 422 to be close to the front wheel 32, so that the size of the three-wheeled baby carrier in the height direction can be reduced. Therefore, through the series of rotating actions, the volume of the folded three-wheeled baby carriage is further reduced, the occupied space after folding is reduced, and the carrying and the storage are more convenient. In this embodiment, when the three-wheeled stroller is folded, the left rear leg 411 is rotated about the third axis C and the right rear leg 421 is rotated about the fifth axis E, then the left rear leg 411 is rotated about the fourth axis D and the right rear leg 421 is rotated about the sixth axis F, and the front stay 2 is rotated about the first axis a.

As shown in fig. 6 and 9, the fourth axis D and the sixth axis F are perpendicular to the symmetry plane SP, so that the left support portion 41 and the right support portion 42 can rotate flexibly and smoothly relative to the support frame 1 when the three-wheeled stroller is folded, and the three-wheeled stroller is compact in size and occupies a small space after being folded.

As shown in fig. 6 to 8, the fourth axis D and the sixth axis F are coincided in a collinear manner, so that the whole three-wheeled stroller is simple and compact in structure, and when the three-wheeled stroller is in an unfolded state, the third axis C and the fifth axis E form acute angles with the vertical plane VP, so that when the size of the three-wheeled stroller is transversely reduced, the left rear leg 411 and the right rear leg 421 are pulled to approach the symmetry plane SP more smoothly and flexibly.

As shown in fig. 3, 4, 5, 14 and 15, the support frame 1 is further provided therein with a transmission mechanism 5 for connecting the front support frame 2 and the rear support assembly and enabling the front support frame 2 and the rear support assembly to be linked. The transmission mechanism 5 is arranged in the support frame 1, the transmission mechanism 5 is more hidden, the whole structure of the three-wheeled baby carrier is more compact, the transmission mechanism 5 enables the front support frame 2 and the rear support assembly to be connected, the transmission mechanism 5 enables the rotation action of the front support frame 2 relative to the support frame 1 and the rotation action of the rear support assembly relative to the support frame 1 to form linkage, namely, as long as any one of the front support frame 2 and the rear support assembly between the two relative support frame 1 rotates, the other relative support frame 1 can be driven to rotate, and therefore the three-wheeled baby carrier is more convenient to fold.

As shown in fig. 3, 4, 5, 8 and 11, the front support frame 2 is rotatably connected with the front side of the support frame 1 around a first axis a through a front rotary seat 21, the transmission mechanism 5 comprises a rack 51 which is arranged in the support frame 1 and can slide in the support frame 1, and a left rotating body 52 rotatable about the fourth axis D in mesh with the rack 51 and a right rotating body 53 rotatable about the sixth axis F, the left rotating body 52 is connected to the left rear leg 411 and can rotate together with the upper end of the left rear leg 411 about the fourth axis D, the right rotating body 53 is connected to the right rear leg 421 and can rotate around the sixth axis F together with the upper end of the right rear leg 421, a transmission rod 54 is connected to the front rotary seat 21 and deviates from the first axis a, one end of the transmission rod 54 is rotatably connected with the front rotary seat 21 around the seventh axis G, and the other end is rotatably connected with the rack 51 around the eighth axis H. Therefore, when the front support frame 2 is pulled to rotate relative to the support frame 1, the front support frame 2 can pull the rack 51 to slide in the support frame 1 through the transmission rod 54, the rack 51 drives the left rotating body 52 engaged with the rack to rotate around the fourth axis D and the right rotating body 53 to rotate around the sixth axis F in the sliding process, the left rotating body 52 drives the left rear leg 411 to rotate relative to the support frame 1 around the fourth axis D, and the right rotating body 53 drives the right rear leg 421 to rotate relative to the support frame 1 around the sixth axis F. Therefore, in the process of realizing the approach of the left rear wheel 412 and the right rear wheel 422 to the front wheel 32, as long as the front support frame 1 rotates relative to the support frame 1, the left support part 41 and the right support part 42 automatically rotate and fold relative to the support frame 1 at the same time. And the whole transmission mechanism 5 is simple and compact, so that the linkage between the front support frame 2 and the rear support assembly is flexible and smooth.

As shown in fig. 3, 5, 8 and 11, a left swinging member 413 is fixedly connected to the upper end of the left rear leg 411, the left swinging member 413 is rotatably connected to the left rotating member 52 around a third axis C and can rotate around the third axis C relative to the left rotating member 52, and the left swinging member 413 can rotate around a fourth axis D together with the left rotating member 52; a right swinging member 423 is fixedly connected to an upper end of the right rear leg 421, the right swinging member 423 is rotatably connected to the right rotating member 53 about a fifth axis E and is rotatable about a fifth axis E with respect to the right rotating member 53, and the right swinging member 423 is rotatable about a sixth axis F together with the right rotating member 53. Therefore, when the three-wheeled stroller needs to be folded, the left rear leg 411 and the right rear leg 421 are firstly pulled towards the symmetry plane SP to make the left rear leg 411 swing around the third axis C together with the left swinging body 413 relative to the left rotating body 52 and make the right rear leg 421 swing around the fifth axis E together with the right swinging body 423 relative to the right rotating body 53, so as to achieve the purpose of reducing the size of the three-wheeled stroller in the left-right transverse direction, then the front support frame 2 rotates around the first axis a relative to the support frame 1 through the transmission mechanism 5, the left support part 41 rotates around the fourth axis D relative to the support frame 1, and the right support part 42 rotates around the sixth axis F relative to the support frame 1, so as to approach the left rear wheel 412 and the right rear wheel 422 to the front wheel 32, and reduce the size of the three-wheeled stroller in. The size of the three-wheeled bassinet in the left and right transverse directions and the height direction is reduced, so that the three-wheeled bassinet has small volume, small occupied space and convenient carrying and storage after being folded.

As shown in fig. 3, 8, 11 and 16, a left locking device for locking the left swinging body 413 and the left rotating body 52 when the three-wheeled stroller is unfolded is disposed between the left swinging body 413 and the left rotating body 52, the left locking device includes a left locking groove 61 disposed on the left swinging body 413, a left sliding block 62 capable of sliding in the supporting frame 1 is disposed in the supporting frame 1, a left locking block 63 capable of being engaged with the left locking groove 61 is disposed on the left sliding block 62, a left push rod 64 capable of pushing the left locking block 63 out of the left locking groove 61 is disposed in the left swinging body 413, a left inner spring 67 capable of pushing the left push rod 64 to return is further disposed in the left swinging body 413, a return spring 65 capable of pushing the left sliding block 62 to return is disposed in the supporting frame 1, one end of the left sliding block 62 abuts against the left swinging body 413, the other end of the left sliding block 62 abuts against the return spring 65, a left pushing component 66 exposed outside and capable of pushing the left push rod 64 is further disposed on the left rear leg 411, the left pushing member 66 includes a left button 661 disposed at the upper end of the left rear leg 411 and capable of pushing the left push rod 64 to slide. When the left rear wheel 412 is close to the symmetry plane SP to reduce the left-right transverse dimension of the three-wheeled stroller, the left button 661 is pressed, the left button 661 presses the left push rod 64, the left push rod 64 pushes the left locking block 63 out of the left locking groove 61, the left slider 62 slides in the support frame 1 to compress the return spring 65, when the left locking block 63 is separated from the left locking groove 61, the left rear leg 411 can be pulled, so that the left rear leg 411 and the left swinging body 413 rotate together around the third axis C, the left rear wheel 412 is close to the symmetry plane SP, and the left transverse dimension of the three-wheeled stroller is reduced. The whole structure design is ingenious, and the operation is very convenient.

As shown in fig. 3, 8 and 11, a right locking device for locking the right swinging body 423 and the right rotating body 53 when the three-wheeled stroller is in an unfolded state is provided between the two swinging bodies 423, the right locking device includes a right locking groove 71 provided in the right swinging body 423, a right slider 72 slidable in the supporting frame 1 is provided in the supporting frame, a right locking block 73 engageable with the right locking groove 71 is provided on the right slider 72, a right push rod 74 capable of pushing the right locking block 73 out of the right locking groove 71 is provided in the right swinging body 423, and a right inner spring 77 capable of pushing the right push rod 74 to return is further provided in the right swinging body 423. One end of the right slider 72 abuts against the right swinging body 423, the other end abuts against the return spring 65, the right rear leg 421 is further provided with a right pushing component 76 which is exposed and can push the right push rod 74, and the right pushing component 76 comprises a right button 761 which is arranged at the upper end of the right rear leg 421 and can push the right push rod 74 to slide. When the right rear wheel 422 is made to approach the symmetry plane SP to reduce the left-right transverse dimension of the three-wheeled baby carriage, the right button 761 is pressed, the right push rod 74 is pressed by the right button 761, the right push rod 74 pushes the right locking block 73 out of the right locking groove 71, the right slider 72 slides in the support frame 1 to compress the return spring 65, and when the right locking block 73 is separated from the right locking groove 71, the right rear leg 421 can be pulled, so that the right rear leg 421 and the right swinging body 423 rotate around the fifth axis E together, the right rear wheel 422 approaches the symmetry plane SP, and the transverse dimension of the right side of the three-wheeled baby carriage is reduced. The whole structure design is ingenious, and the operation is very convenient.

The left positioning slot 68 is arranged on the left swinging body 413, and when the left rear leg 411 is close to the symmetry plane SP, the left locking block 63 on the left sliding block 62 is clamped in the left positioning slot 68, so that the left rear leg 411 is positioned, and the left rear leg 411 is prevented from being unfolded by mistake. When the locking mechanism needs to be unfolded, the left rear leg 411 is pulled slightly hard, so that the left locking block 63 is withdrawn from the left positioning groove 68. For the same reason, the right swinging member 423 is also provided with a right positioning groove for engaging with the right locking piece 73, so that the right rear leg 421 is positioned when approaching the symmetry plane SP.

Claims

1. A three-wheeled buggy having a vertical plane of Symmetry (SP) and being movable from an unfolded position to a folded position, characterized in that: including support frame (1) that is used for supporting the seat, support frame (1) front side be connected with can be relative it around first axis (A) pivoted preceding strut (2), preceding strut (2) on be connected with and turn to subassembly (3), turn to subassembly (3) including can be relative preceding strut (2) around second axis (B) pivoted rotating turret (31), rotating turret (31) lower extreme be equipped with front wheel (32), rotating turret (31) upper end be connected with turn to handle (33), support frame (1) rear side be connected with the back support subassembly, the back support subassembly including setting up left supporting part (41) and right supporting part (42) in plane of Symmetry (SP) both sides, left supporting part (41) including left back leg (411) and establish left wheel (412) at left back leg (411) lower extreme, left back leg (411) upper end around third axis (C) and fourth axis (D) and support frame (1) rotatable coupling, the left rear wheel (412) is movable from a position away from the Symmetry Plane (SP) to a position close to the Symmetry Plane (SP) when the left rear leg (411) is rotated about the third axis (C), and the left rear wheel (412) is movable from a position away from the front wheel (32) to a position close to the front wheel (32) when the left rear leg (411) is rotated about the fourth axis (D); the right supporting portion (42) comprises a right rear leg (421) and a right rear wheel (422) arranged at the lower end of the right rear leg (421), the upper end of the right rear leg (421) is rotatably connected with the support frame (1) around a fifth axis (E) and a sixth axis (F), when the right rear leg (421) rotates around the fifth axis (E), the right rear wheel (422) can move to a position close to the Symmetry Plane (SP) from a position far away from the Symmetry Plane (SP), and when the right rear wheel (422) rotates around the sixth axis (F), the right rear wheel (422) can move to a position close to the front wheel (32) from a position far away from the front wheel (32).

2. A three-wheeled stroller according to claim 1, wherein: the fourth axis (D) and the sixth axis (F) are perpendicular to the plane of Symmetry (SP).

3. A three-wheeled buggy according to claim 1 or 2, characterized in that: the support frame (1) is also internally provided with a transmission mechanism (5) which is connected with the front support frame (2) and the rear support assembly and can enable the front support frame (2) and the rear support assembly to be linked.

4. A three-wheeled stroller according to claim 3, wherein: the front support frame (2) is rotatably connected with the front side of the support frame (1) around the first axis (A) through a front rotating seat (21), the transmission mechanism (5) comprises a rack (51) which is arranged in the support frame (1) and can slide in the support frame (1), a left rotating body (52) which can be meshed with the rack (51) and can rotate around a fourth axis (D) and a right rotating body (53) which can rotate around a sixth axis (F), the left rotating body (52) is connected with the left rear leg (411) and can rotate around the fourth axis (D) together with the upper end of the left rear leg (411), the right rotating body (53) is connected with the right rear leg (421) and can rotate around the sixth axis (F) together with the upper end of the right rear leg (421), a transmission rod (54) is connected on the front rotating seat (21) in a position deviating from the first axis (A), one end of the transmission rod (54) rotates around a seventh axis (G) and is connected with the front rotating seat (21), the other end is connected with the rack (51) in a rotating way around an eighth axis (H).

5. A three-wheeled stroller according to claim 4, wherein: the upper end of the left rear leg (411) is fixedly connected with a left swinging body (413), the left swinging body (413) and the left rotating body (52) are rotatably connected around a third axis (C) and can rotate around the third axis (C) relative to the left rotating body (52), and the left swinging body (413) and the left rotating body (52) can rotate around a fourth axis (D) together; the upper end of the right rear leg (421) is fixedly connected with a right swinging body (423), the right swinging body (423) is connected with the right rotating body (53) around a fifth axis (E) in a rotating way and can rotate around the fifth axis (E) relative to the right rotating body (53), and the right swinging body (423) can rotate around a sixth axis (F) together with the right rotating body (53).

6. A three-wheeled stroller according to claim 5, wherein: a left locking device for locking the left swinging body (413) and the left rotating body (52) when the three-wheeled baby carriage is unfolded, the left locking device comprises a left locking groove (61) arranged on the left swinging body (413), a left sliding block (62) which can slide in the supporting frame (1) is arranged in the supporting frame, a left locking block (63) which can be clamped with the left locking groove (61) is arranged on the left sliding block (62), a left push rod (64) which can push the left locking block (63) out of the left locking groove (61) is arranged in the left swinging body (413) in a penetrating way, a return spring (65) capable of pushing the left sliding block (62) to return is arranged in the supporting frame (1), one end of the left sliding block (62) is propped against the left swinging body (413), the other end is propped against the return spring (65), the left rear leg (411) is also provided with a left pushing component (66) which is exposed and can push the left push rod (64).

7. A three-wheeled stroller according to claim 6, wherein: a right locking device used for locking the right swinging body (423) and the right rotating body (53) when the three-wheeled baby carriage is in an unfolded state is arranged between the right swinging body (423) and the right rotating body (53), the right locking device comprises a right locking groove (71) arranged on the right swinging body (423), a right sliding block (72) capable of sliding in the supporting frame (1) is arranged in the supporting frame, a right locking block (73) capable of being clamped with the right locking groove (71) is arranged on the right sliding block (72), a right push rod (74) capable of pushing the right locking block (73) out of the right locking groove (71) penetrates through the right swinging body (423), one end of the right sliding block (72) abuts against the right swinging body (423), the other end of the right swinging body abuts against a return spring (65), and a right pushing component (76) which is exposed and capable of pushing the right push rod (74) is further arranged on the right rear leg (421).

8. A three-wheeled stroller according to claim 7, wherein: left side pushing means (66) including establish left push button (661) that sets up in left back leg (411) upper end and can promote left push rod (64) slip, right pushing means (76) including establishing in right back leg (421) upper end and can promote right push button (761) that right push rod (74) slided.

9. A three-wheeled stroller according to claim 7, wherein: the left swinging body (413) is also internally provided with a left inner spring (67) capable of pushing the left push rod (64) to reset, and the right swinging body (423) is also internally provided with a right inner spring (77) capable of pushing the right push rod (74) to reset.

10. A three-wheeled stroller according to claim 1, wherein: the fourth axis (D) and the sixth axis (F) coincide collinearly, and, in the unfolded condition of the buggy, the third axis (C) and the fifth axis (E) are both at an acute angle to the Vertical Plane (VP).