CN106494487B

CN106494487B - Foldable baby carriage and folding method thereof

Info

Publication number: CN106494487B
Application number: CN201610965251.2A
Authority: CN
Inventors: 罗革
Original assignee: CIXI FUBEIBEI CHILDREN ARTICLES CO LTD
Current assignee: CIXI FUBEIBEI CHILDREN ARTICLES CO LTD
Priority date: 2016-10-28
Filing date: 2016-10-28
Publication date: 2023-07-07
Anticipated expiration: 2036-10-28
Also published as: CN106494487A

Abstract

The invention discloses a foldable baby carriage which comprises a pair of handle bars, a pair of front legs, a pair of rear legs, a pair of handrails and a protection part, wherein the protection part is positioned at the front part of a baby carriage main body, two ends of the protection part are respectively connected with two handrails, each handle bar comprises an upper bar and a lower bar, the upper bar and the lower bar in each handle bar are connected through a first connecting mechanism, the lower bars, the front legs and the rear legs which are positioned on the same side part of the baby carriage main body are connected through a second connecting mechanism, the handrails and the lower bars which are positioned on the same side part of the baby carriage main body are rotatably connected, the handrails and the protection part are connected through a third connecting mechanism, and in the folding process, the first connecting mechanism is unlocked only by one time of manual unlocking, and the second connecting mechanism and the third connecting mechanism can be unlocked automatically in the folding process, so that the baby carriage is convenient to unlock for many times in the folding process.

Description

Foldable baby carriage and folding method thereof

Technical Field

The invention relates to a foldable baby carriage and a folding method thereof.

Background

In order to facilitate carrying, storage and placement, many foldable strollers are currently available on the market, but the foldable strollers need to unlock a plurality of rotation joints step by step when being folded, so that the operation is complex when being folded.

Disclosure of Invention

The invention aims to solve the technical problem of providing a foldable baby carriage, which is convenient to fold by unlocking only one rotary joint when being folded.

In order to solve the technical problems, the foldable stroller provided by the invention comprises a stroller main body which can be folded from an unfolded state to a folded state, wherein the stroller main body comprises a pair of handle bars, a pair of front legs, a pair of rear legs, a pair of armrests and a protection part, the protection part is positioned at the front part of the stroller main body, and two ends of the protection part are respectively connected with the two armrests;

each handle bar comprises an upper bar and a lower bar, the upper bar and the lower bar in each handle bar are connected through a first connecting mechanism, the first connecting mechanism is arranged to be capable of being switched between a first state and a second state, the upper bar and the lower bar in each handle bar are mutually locked, and the upper bar and the lower bar in each handle bar can be turned relatively in the second state;

the lower rod, the front leg and the rear leg which are positioned on the same side part of the baby carriage body are connected through a second connecting mechanism, the second connecting mechanism is arranged to be capable of being switched between a first state and a second state, the lower rod, the front leg and the rear leg are mutually locked in the first state, and the lower rod, the front leg and the rear leg can be turned relatively in the second state;

the lower rod of each handle rod is provided with an unlocking mechanism, the first connecting mechanism, the unlocking mechanism and the second connecting mechanism which are positioned on the same side part of the baby carriage body are sequentially connected, and the unlocking mechanism is arranged into a structure capable of switching the second connecting mechanism from a first state to a second state in the process of relatively overturning the upper rod and the lower rod of the handle rod;

the armrests and the lower rods on the same side part of the baby carriage body are rotatably connected, the armrests are connected with the protection parts through a third connecting mechanism, and the third connecting mechanism is arranged to be capable of being switched between a first state and a second state through rotation of the armrests, wherein the armrests and the protection parts are mutually locked in the first state, and the armrests and the protection parts can be turned relatively in the second state;

the rotation axes of the upper rod, the lower rod, the front leg, the rear leg, the handrail and the protection part are mutually parallel when the upper rod, the lower rod, the front leg, the rear leg, the handrail and the protection part are overturned;

the second connecting mechanism comprises a third rotating seat, a fourth rotating seat and a fifth rotating seat, wherein the third rotating seat is fixedly connected with the lower end of the lower rod, the fourth rotating seat is fixedly connected with the upper end of the rear leg, the fifth rotating seat is fixedly connected with the front leg, the fourth rotating seat and the fifth rotating seat are both accommodated in the third rotating seat, clamping grooves are formed in the side walls of the fourth rotating seat and the fifth rotating seat, and a clamping block is movably arranged in the third rotating seat;

when the second connecting mechanism is in the first state, the clamping blocks are inserted into the two clamping grooves so that the fourth rotating seat and the fifth rotating seat are circumferentially limited, and when the second connecting mechanism is in the second state, the clamping blocks are separated from the two clamping grooves so that the lower rod, the front legs and the rear legs can be turned relatively.

Preferably, the first connecting mechanism comprises a first rotating seat, a second rotating seat, a pressing piece, a reset spring and a first fluted disc, wherein the first rotating seat is fixedly connected with the upper end of the lower rod, the second rotating seat is fixedly connected with the lower end of the upper rod, the first rotating seat and the second rotating seat are oppositely arranged and are rotatably connected through a pin shaft, the pressure spring and the first fluted disc are arranged between the first rotating seat and the second rotating seat, at least one first convex tooth is arranged on the peripheral wall of the first fluted disc, a first groove for accommodating the first convex tooth to enable the first rotating seat to be circumferentially limited with the first fluted disc is arranged on the inner peripheral wall of the first rotating seat, a second groove for accommodating the first convex tooth to enable the second rotating seat to be circumferentially limited with the first fluted disc is arranged on the inner peripheral wall of the second rotating seat, the first groove, the first convex tooth and the second groove are correspondingly arranged one by one, the pressing piece is movably arranged on the first rotating seat, the pressing piece is abutted against one surface of the first fluted disc, and the other surface of the other end of the first fluted disc is abutted against one end of the reset spring;

when the first connecting mechanism is in the first state, the first convex teeth are simultaneously accommodated in the corresponding first groove and the second groove, and when the first connecting mechanism is in the second state, the first convex teeth are separated from the first groove and are independently accommodated in the second groove.

Preferably, the unlocking mechanism comprises a pull rope, a pressure spring and a positioning pin, one end of the pull rope is connected with the second rotating seat, the other end of the pull rope is connected with the clamping block, the pressure spring and the positioning pin are arranged in the lower rod, one end of the pressure spring is propped against one end of the clamping block, which is far away from the clamping groove, and the other end of the pressure spring is propped against the positioning pin, and when the second rotating seat rotates, the clamping block is driven to move in a direction far away from the clamping groove through the pull rope, so that the clamping block is separated from the clamping groove.

Preferably, the third connecting mechanism comprises a fixed seat, a sixth rotating seat, a seventh rotating seat, a second fluted disc and a reset spring, wherein the handrail is fixedly connected with the sixth connecting seat, the sixth rotating seat is rotatably connected with one end of the fixed seat, the seventh rotating seat is connected with the other end of the fixed seat, the second fluted disc and the reset spring are both positioned between the fixed seat and the seventh rotating seat, one end of the second fluted disc is propped against the fixed seat, the other end of the second fluted disc is propped against one end of the reset spring, the other end of the reset spring is propped against the seventh rotating seat, one end, close to the sixth rotating seat, of the second fluted disc is provided with at least one lug, the side wall of the second fluted disc is provided with at least one second convex tooth, the inner peripheral wall of the fixed seat is provided with a third groove for accommodating the second convex tooth to enable the second fluted disc to be circumferentially limited with the fixed seat, the inner peripheral wall of the seventh rotating seat is provided with a fourth groove for accommodating the second convex tooth to enable the second fluted disc to be circumferentially limited with the seventh rotating seat, and the fourth groove is correspondingly arranged one by one;

the inner wall of the sixth rotating seat is provided with a bulge which is used for being contacted with the lug when the sixth rotating seat rotates so as to push the second fluted disc to move towards the direction close to the seventh rotating seat;

when the third connecting mechanism is in the first state, the second convex teeth are simultaneously accommodated in the corresponding third groove and fourth groove, and when the third connecting mechanism is in the second state, the second convex teeth are separated from the third groove and are independently accommodated in the fourth groove.

Preferably, the third connecting mechanism further comprises a torsion spring, one end of the torsion spring is engaged with the fixing seat, the other end of the torsion spring is engaged with the seventh rotating seat, and when the third connecting mechanism is in the second state, the torsion spring applies a rotation moment to the seventh rotating seat.

The invention also discloses a baby carriage folding method, which comprises the following steps:

switching the first connecting mechanism from the first state to the second state, and then turning the upper rod towards the front part of the baby carriage main body;

when the upper rod is overturned to a position close to the lower rod, the unlocking mechanism automatically switches the second connecting mechanism from the first state to the second state;

continuously turning the upper rod towards the front part of the baby carriage main body until the upper rod and the lower rod are folded, then turning the lower rod towards the rear part of the baby carriage main body so as to gradually draw the lower rod towards the rear legs, and driving the handle to rotate by the lower rod when the lower rod is turned;

after the lower rod is overturned for a certain angle, the handle switches the third connecting mechanism from the first state to the second state, and then the protection part overturns towards the rear part of the baby carriage body;

then the lower rod and the front leg are turned over towards opposite directions, so that the lower rod, the rear leg and the front leg are folded;

the folding of the stroller is completed.

After adopting the structure, compared with the prior art, the invention has the following advantages:

when the baby carriage is required to be folded, the first connecting mechanism is only required to be unlocked manually, then the upper rod can be turned over and folded towards the front part of the baby carriage main body, then the second connecting mechanism can be automatically unlocked through the unlocking mechanism when the upper rod is turned over, the lower rod can be turned over and folded towards the rear part of the baby carriage main body after the second connecting mechanism is unlocked, then the third connecting mechanism can be automatically unlocked through the handle when the lower rod is turned over, the protective part can be turned over towards the rear part of the baby carriage main body after the third connecting mechanism is unlocked, and then the lower rod and the front legs are turned over towards opposite directions, so that the lower rod, the rear legs and the front legs are folded, and the baby carriage can be folded. In the folding process of the baby carriage, the first connecting mechanism is unlocked only by one time of manual unlocking, and the second connecting mechanism and the third connecting mechanism can be automatically unlocked in the folding process, so that multiple unlocking operations are not needed in the folding process of the baby carriage, and the baby carriage is convenient to fold.

Drawings

FIG. 1 is a perspective view of a stroller;

FIG. 2 is a side view of the stroller;

FIG. 3 is a schematic view of the first connection mechanism;

FIG. 4 is a schematic view of the first connection mechanism from another perspective;

FIG. 5 is a schematic structural view of a second connection mechanism;

FIG. 6 is a schematic structural view of the second coupling mechanism from another perspective;

FIG. 7 is a partial cross-sectional view of a third coupling mechanism;

fig. 8 is a schematic structural view of the third connecting mechanism.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description.

As shown in fig. 1 and 2, the foldable stroller of the present invention has a stroller body 100 that is foldable from an unfolded state to a folded state, the stroller body 100 includes a pair of handle bars 1, a pair of front legs 2, a pair of rear legs 3, a pair of armrests 4, and a protection member 5, the protection member 5 is positioned at the front portion of the stroller body 100, both ends of the protection member 5 are respectively connected to the two armrests 4, and the protection member 5 is used for preventing a baby from leaning forward when sitting on the stroller body, and the structure of the stroller body is symmetrical left and right.

Each handle bar 1 comprises an upper bar 101 and a lower bar 102, the upper bar 101 and the lower bar 102 in each handle bar 1 being connected by a first connecting means, which is a rotary joint, the first connecting means being arranged to be switchable between a first state in which the upper bar 101 and the lower bar 102 in each handle bar 1 are locked to each other and a second state in which the upper bar 101 and the lower bar 102 in each handle bar 1 are tiltable relative to each other.

The lower rod 102, the front leg 2 and the rear leg 3 on the same side of the baby carriage body are all connected by a second connecting mechanism, which is a rotary joint, and the second connecting mechanism is arranged to be switchable between a first state in which the lower rod 102, the front leg 2 and the rear leg 3 are locked to each other and a second state in which the lower rod 102, the front leg 2 and the rear leg 3 are relatively reversible.

The lower rod 102 of each handle rod 1 is provided with an unlocking mechanism, and a first connecting mechanism, an unlocking mechanism and a second connecting mechanism which are positioned on the same side part of the baby carriage body are sequentially connected, wherein the unlocking mechanism is arranged as a structure capable of switching the second connecting mechanism from a first state to a second state in the process of relatively overturning the upper rod 101 and the lower rod 102 of the handle rod 1.

The armrest 4 and the lower rod 102 on the same side of the baby carriage body are both rotatably connected, the armrest 4 and the protection member 5 are both connected by a third connecting mechanism, which is a rotary joint, and the third connecting mechanism is arranged so as to be switchable between a first state in which the armrest 4 and the protection member 5 are locked to each other and a second state in which the armrest 4 and the protection member 5 are relatively reversible by rotation of the armrest 4.

The rotational axes of the upper lever 101, the lower lever 102, the front leg 2, the rear leg 3, the armrest 4, and the protection member 5 at the time of turning are parallel to each other.

The structure of the baby carriage main body is bilaterally symmetrical, that is to say, the left side and the right side of the baby carriage main body are provided with a first connecting mechanism, an unlocking mechanism, a second connecting mechanism and a third connecting mechanism, and the structures of the first connecting mechanism, the unlocking mechanism, the second connecting mechanism and the third connecting mechanism on the left side and the right side of the baby carriage main body are completely consistent.

As shown in fig. 3 and 4, the first connection mechanism includes a first rotating seat 103, a second rotating seat 104, a pressing member 105, a return spring 106 and a first toothed disc 107, where the first rotating seat 103 is fixedly connected with the upper end of the lower rod 102, the second rotating seat 104 is fixedly connected with the lower end of the upper rod 101, the first rotating seat 103 and the second rotating seat 104 are oppositely arranged and rotatably connected through a pin shaft 108, the return spring 106 and the first toothed disc 107 are both arranged between the first rotating seat 103 and the second rotating seat 104, at least one first convex tooth 1071 is arranged on the peripheral wall of the first toothed disc 107, a first groove 1031 for accommodating the first convex tooth 1071 so as to enable the first rotating seat 103 to be circumferentially limited with the first toothed disc 107 is arranged on the inner peripheral wall of the second rotating seat 104, a second groove 1041 for accommodating the first convex tooth 1071 so as to enable the second rotating seat 104 to be circumferentially limited with the first toothed disc 107 is arranged on the inner peripheral wall of the second rotating seat 104, the first concave tooth 1071 is arranged on the peripheral wall of the first toothed disc 107, the first concave tooth 1071 is opposite to the first rotary seat 103, the other end is pressed against the first concave tooth 107, and the other end of the first toothed disc 107 is arranged on the inner peripheral wall of the first toothed disc 107, and the first concave tooth 107 is pressed against the surface of the first concave tooth 107.

When the first connection mechanism is in the first state, the first protruding teeth 1071 are simultaneously accommodated in the corresponding first groove 1031 and second groove 1041, so that the first rotating seat 103 and the second rotating seat 104 are mutually locked, and the upper rod 101 and the lower rod 102 are mutually locked and cannot rotate relatively, when the upper rod 101 and the lower rod 102 need to be turned relatively, the pressing piece 105 is pressed down, the first fluted disc 107 is pushed to move, the reset spring 106 is compressed when the first fluted disc 107 moves, the first connection mechanism is switched to the second state after the pressing piece 105 is pressed in place, and when the first connection mechanism is in the second state, the first protruding teeth 1071 are separated from the first groove 1031 and are singly accommodated in the second groove 1041, so that the first rotating seat 103 and the second rotating seat 104 are unlocked, and the upper rod 101 and the lower rod 102 can be turned relatively; in this way, when the first connecting mechanism is switched from the first state to the second state, only the pressing piece 105 needs to be pressed down, so that the operation is convenient.

As shown in fig. 5 and 6, the second connection mechanism includes a third rotating seat 601, a fourth rotating seat 602, and a fifth rotating seat 603, where the third rotating seat 601 is fixedly connected with the lower end of the lower rod 102, the fourth rotating seat 602 is fixedly connected with the upper end of the rear leg 3, the fifth rotating seat 603 is fixedly connected with the front leg 2, the fourth rotating seat 602 and the fifth rotating seat 603 are all accommodated in the third rotating seat 601, and the third rotating seat 601, the fourth rotating seat 602 and the fifth rotating seat 603 are connected by a positioning pin, the side walls of the fourth rotating seat 602 and the fifth rotating seat 603 are all provided with a clamping groove 607, a clamping block 604 is movably arranged in the third rotating seat 601, and the clamping block 604 can move to make the clamping block 604 clamped in the two clamping grooves 607 or make the clamping block 604 separate from the two clamping grooves 607.

When the second connecting mechanism is in the first state, the clamping blocks 604 are inserted into the two clamping grooves 607 to enable the fourth rotating seat 602 and the fifth rotating seat 603 to be circumferentially limited, at this time, the upper rod 102, the rear leg 3 and the front leg 2 are mutually locked and cannot be turned and folded, and when the second connecting mechanism is in the second state, the clamping blocks 604 are separated from the two clamping grooves 607 to enable the lower rod 102, the front leg 2 and the rear leg 3 to rotate around the positioning pin shafts, so that the lower rod 102, the front leg 2 and the rear leg 3 can be turned relatively.

The unlocking mechanism comprises a pull rope 701, a pressure spring 702 and a positioning pin 703, one end of the pull rope 701 is connected with the second rotating seat 104, the other end of the pull rope 701 is connected with the clamping block 604, the pressure spring 702 and the positioning pin 703 are arranged in the lower rod 102, one end of the pressure spring 702 is propped against one end of the clamping block 604, which is far away from the clamping groove 607, and the other end of the pressure spring 702 is propped against the positioning pin 703, when the second rotating seat 104 rotates, the pull rope 701 is pulled by the second rotating seat 104, and the pull rope 701 drives the clamping block 604 to move in the direction, which is far away from the clamping groove 607, so that the clamping block 604 is separated from the clamping groove 607, and the second connecting mechanism is switched from the first state to the second state.

As shown in fig. 7 and 8, the third connection mechanism includes a fixed seat 801, a sixth rotating seat 802, a seventh rotating seat 803, a second toothed disc 804 and a return spring 805, the fixed seat 801 is fixed relative to the stroller body, the armrest 4 is fixedly connected with the sixth rotating seat 802, the sixth rotating seat 802 is rotatably connected with one end of the fixed seat 801, the seventh rotating seat 803 is connected with the other end of the fixed seat 801, the second toothed disc 804 and the return spring 805 are both located between the fixed seat 801 and the seventh rotating seat 803, one end of the second toothed disc 804 is abutted against the fixed seat 801, the other end of the second toothed disc 804 is abutted against one end of the return spring 805, the other end of the return spring 805 is abutted against the seventh rotating seat 803, one end of the second toothed disc 804, which is close to the sixth rotating seat 802, is provided with at least one bump 8041, the side wall of the second toothed disc 804 is provided with at least one second convex tooth 8042, the inner peripheral wall of the fixed seat 801 is provided with a third groove 8011 for holding the second convex tooth 8042 so that the second toothed disc 8011 and the fixed seat 801 are limited circumferentially, the seventh groove 8011 is correspondingly arranged on the inner peripheral wall of the seventh toothed disc 8031, and the fourth groove 8031 is correspondingly arranged with the second concave 8031.

Each armrest 4 is composed of a first armrest rod 401 and a second armrest rod 402, the first armrest rod 401 and the second armrest rod 402 are hinged to each other by a hinge shaft, and the center line of the hinge shaft is parallel to the rotation axis of the upper rod 101, the lower rod 102, the front leg 2, the rear leg 3, the armrest 4, and the protection member 5 when being turned over.

The inner wall of the sixth rotating seat 802 is provided with a protrusion 8021 for contacting with the bump 8041 to push the second tooth disc 804 to move towards the direction close to the seventh rotating seat 803 when the sixth rotating seat 802 rotates, that is, when the armrest 4 drives the sixth rotating seat 802 to rotate, the protrusion 8021 on the sixth rotating seat 802 pushes the second tooth disc 804 to move towards the direction close to the seventh rotating seat 803, so that the second tooth protrusion 8042 is separated from the third groove 8011 and completely enters the fourth groove 8031.

When the third connecting mechanism is in the first state, the second convex teeth 8042 are simultaneously accommodated in the corresponding third groove 8011 and fourth groove 8031, at this time, the fixed seat 801 and the seventh rotating seat 803 are mutually locked, and when the third connecting mechanism is in the second state, the second convex teeth 8042 are separated from the third groove 8011 and are separately accommodated in the fourth groove 8031, at this time, the fixed seat 801 and the seventh rotating seat 803 are unlocked and locked, so that the protection component 5 can rotate relative to the fixed seat 801.

The third connecting mechanism further comprises a torsion spring 806, one end of the torsion spring 806 is engaged with the fixing seat 801, the other end of the torsion spring 806 is engaged with the seventh rotating seat 803, when the third connecting mechanism is in the second state, the torsion spring 806 applies a rotating moment to the seventh rotating seat 803, so that after the third connecting mechanism is switched from the first state to the second state, the torsion spring 806 applies a rotating moment to the seventh rotating seat 803, and the protection component 5 is automatically folded towards the rear direction of the stroller body, and therefore, the protection component does not need to be manually turned over, and the stroller is more convenient to fold.

The folding method of the baby carriage comprises the following steps:

pressing down the pressing piece to switch the first connecting mechanism from the first state to the second state so that the upper rod and the lower rod can be turned relatively, and then turning the upper rod towards the front part of the baby carriage main body so that the upper rod and the lower rod are folded;

in the process of turning the upper rod, the second rotating seat pulls the inhaul cable upwards, and when the upper rod is turned to a position close to the lower rod, the inhaul cable pulls the clamping blocks 604 out of the two clamping grooves 607, so that the second connecting mechanism is switched from the first state to the second state, and the lower rod, the front legs and the rear legs can be turned relatively;

continuing to turn the upper rod towards the front of the baby carriage body until the upper rod and the lower rod are folded, then turning the lower rod towards the rear of the baby carriage body so as to gradually draw the lower rod towards the rear legs, driving the handle to rotate by the lower rod when the lower rod is turned, driving the sixth rotating seat 802 to synchronously rotate when the handle rotates, and pushing the second fluted disc 804 to a direction approaching to the seventh rotating seat 803 when the sixth rotating seat 802 rotates;

after the lower rod is overturned for a certain angle, the handle switches the third connecting mechanism from the first state to the second state, so that the seventh rotating seat 803 and the fixed seat 801 are unlocked and mutually locked, and then the seventh rotating seat 803 overturns towards the rear part of the baby carriage body due to the acting force of the torsion spring 806, so that the protection part 5 is driven to overturne towards the rear part of the baby carriage body;

the folding of the stroller is completed.

The above description is only given for the preferred example of the application of the present invention, but it is not to be construed as limiting the claims, and the structure of the present invention can be changed in other ways, not limited to the above-described structure. In general, all changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A collapsible pushchair having a pushchair body collapsible from an unfolded state to a folded state, the pushchair body comprising a pair of handle bars (1), a pair of front legs (2), a pair of rear legs (3), a pair of armrests (4) and a protective member (5), the protective member (5) being located in the front of the pushchair body, the ends of the protective member (5) being connected to the two armrests (4) respectively, characterized in that:

each handle bar (1) comprises an upper bar (101) and a lower bar (102), the upper bar (101) and the lower bar (102) in each handle bar (1) are connected by a first connecting mechanism, the first connecting mechanism is arranged to be switchable between a first state in which the upper bar (101) and the lower bar (102) in each handle bar (1) are locked to each other and a second state in which the upper bar (101) and the lower bar (102) in each handle bar (1) are relatively reversible;

the lower rod (102), the front leg (2) and the rear leg (3) which are positioned on the same side part of the baby carriage body are all connected through a second connecting mechanism, and the second connecting mechanism is arranged to be capable of being switched between a first state and a second state, wherein the lower rod (102), the front leg (2) and the rear leg (3) are mutually locked in the first state, and the lower rod (102), the front leg (2) and the rear leg (3) can be turned relatively in the second state;

an unlocking mechanism is arranged on the lower rod (102) of each handle rod (1), a first connecting mechanism, an unlocking mechanism and a second connecting mechanism which are positioned on the same side part of the baby carriage body are sequentially connected, and the unlocking mechanism is arranged as a structure capable of switching the second connecting mechanism from a first state to a second state in the process of relatively overturning the upper rod (101) and the lower rod (102) of the handle rod (1);

the handrail (4) and the lower rod (102) positioned on the same side part of the baby carriage body are rotatably connected, the handrail (4) and the protection part (5) are connected through a third connecting mechanism, and the third connecting mechanism is arranged to be capable of being switched between a first state and a second state by rotating the handrail (4), wherein the handrail (4) and the protection part (5) are mutually locked in the first state, and the handrail (4) and the protection part (5) can be turned relatively in the second state;

the rotation axes of the upper rod (101), the lower rod (102), the front leg (2), the rear leg (3), the armrest (4) and the protection component (5) are parallel to each other when the upper rod is turned over;

the second connecting mechanism comprises a third rotating seat (601), a fourth rotating seat (602) and a fifth rotating seat (603), wherein the third rotating seat (601) is fixedly connected with the lower end of the lower rod (102), the fourth rotating seat (602) is fixedly connected with the upper end of the rear leg (3), the fifth rotating seat (603) is fixedly connected with the front leg (2), the fourth rotating seat (602) and the fifth rotating seat (603) are both accommodated in the third rotating seat (601), clamping grooves (607) are formed in the side walls of the fourth rotating seat (602) and the fifth rotating seat (603), and a clamping block (604) is movably arranged in the third rotating seat (601);

when the second connecting mechanism is in the first state, the clamping blocks (604) are inserted into the two clamping grooves (607) so that the fourth rotating seat (602) and the fifth rotating seat (603) are circumferentially limited, and when the second connecting mechanism is in the second state, the clamping blocks (604) are separated from the two clamping grooves (607) so that the lower rod (102), the front legs (2) and the rear legs (3) can be turned relatively.

2. The collapsible pushchair of claim 1, wherein: the first connecting mechanism comprises a first rotating seat (103), a second rotating seat (104), a pressing piece (105), a reset spring (106) and a first fluted disc (107), wherein the first rotating seat (103) is fixedly connected with the upper end of the lower rod (102), the second rotating seat (104) is fixedly connected with the lower end of the upper rod (101), the first rotating seat (103) and the second rotating seat (104) are oppositely arranged and are rotatably connected through a pin shaft (108), the reset spring (106) and the first fluted disc (107) are arranged between the first rotating seat (103) and the second rotating seat (104), at least one first convex tooth (1071) is arranged on the peripheral wall of the first fluted disc (107), a first groove 1031) for accommodating the first convex tooth (1071) is arranged on the inner peripheral wall of the first rotating seat (103) so that the first rotating seat (103) and the first fluted disc (107) are circumferentially limited, the first convex tooth (1031) is arranged on the inner peripheral wall of the second rotating seat (104) so that the first convex tooth (1071) is correspondingly arranged on the first fluted disc (103) and the first fluted disc (107) and the first fluted disc (1041) in a first mode, the pressing piece (105) is abutted against one surface of the first fluted disc (107), the other surface of the first fluted disc (107) is abutted against one end of the return spring (106), and the other end of the return spring (106) is abutted against the inner wall of the second rotating seat (104);

when the first connecting mechanism is in the first state, the first convex teeth (1071) are simultaneously accommodated in the corresponding first grooves (1031) and the second grooves (1041), and when the first connecting mechanism is in the second state, the first convex teeth (1071) are separated from the first grooves (1031) and are independently accommodated in the second grooves (1041).

3. The collapsible pushchair of claim 2, wherein: the unlocking mechanism comprises a inhaul cable (701), a pressure spring (702) and a positioning pin (703), one end of the inhaul cable (701) is connected with the second rotating seat (104), the other end of the inhaul cable (701) is connected with the clamping block (604), the pressure spring (702) and the positioning pin (703) are both arranged in the lower rod (102), one end of the pressure spring (702) is propped against one end, far away from the clamping groove (607), of the clamping block (604), the other end of the pressure spring (702) is propped against the positioning pin (703), and when the second rotating seat (104) rotates, the clamping block (604) is driven to move towards the direction far away from the clamping groove (607) through the inhaul cable (701), so that the clamping block (604) is separated from the clamping groove (607).

4. A collapsible pushchair according to claim 3, wherein: the third connecting mechanism comprises a fixed seat (801), a sixth rotating seat (802), a seventh rotating seat (803), a second fluted disc (804) and a return spring (805), wherein the armrest (4) is fixedly connected with the sixth rotating seat (802), the sixth rotating seat (802) is rotatably connected with one end of the fixed seat (801), the seventh rotating seat (803) is connected with the other end of the fixed seat (801), the second fluted disc (804) and the return spring (805) are both positioned between the fixed seat (801) and the seventh rotating seat (803), one end of the second fluted disc (804) is propped against the fixed seat (801), the other end of the second fluted disc (804) is propped against one end of the return spring (805), the other end of the return spring (805) is propped against the seventh rotating seat (803), one end of the second fluted disc (804) close to the sixth rotating seat (802) is provided with at least one lug (8041), the side wall of the second fluted disc (8042) is provided with at least one second convex tooth (8042), the inner circumference wall of the fixed seat (801) is provided with a second fluted disc (8042) for being used for being propped against the second fluted disc (801) to limit the second fluted disc (801), the inner peripheral wall of the seventh rotating seat (803) is provided with a fourth groove (8031) for accommodating the second convex tooth (8042) so that the second fluted disc (804) and the seventh rotating seat (803) are circumferentially limited, and the second convex tooth (8042), the third groove (8011) and the fourth groove (8031) are arranged in one-to-one correspondence;

a protrusion (8021) for contacting with the bump (8041) to push the second fluted disc (804) to move towards the direction close to the seventh rotating seat (803) when the sixth rotating seat (802) rotates is arranged on the inner wall of the sixth rotating seat (802);

when the third connecting mechanism is in the first state, the second convex teeth (8042) are simultaneously accommodated in the corresponding third groove (8011) and fourth groove (8031), and when the third connecting mechanism is in the second state, the second convex teeth (8042) are separated from the third groove (8011) and are independently accommodated in the fourth groove (8031).

5. The collapsible pushchair of claim 4, wherein: the third connecting mechanism further comprises a torsion spring (806), one end of the torsion spring (806) is connected with the fixing seat (801), the other end of the torsion spring (806) is connected with the seventh rotating seat (803), and when the third connecting mechanism is in the second state, the torsion spring (806) applies a rotating moment to the seventh rotating seat (803).

6. A stroller folding method based on the stroller of claim 1, wherein: the method comprises the following steps:

the folding of the stroller is completed.