CN110525504B

CN110525504B - Folding baby carriage

Info

Publication number: CN110525504B
Application number: CN201910889549.3A
Authority: CN
Inventors: 廖齐辉
Original assignee: Zhongshan Xingshang Baby Product Co ltd
Current assignee: Zhongshan Xingshang Baby Product Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2024-10-22
Anticipated expiration: 2039-09-20
Also published as: CN110525504A

Abstract

The invention discloses a folding baby carriage which comprises a front wheel frame group, a rear wheel frame group and a cushion, wherein a guide pipe fitting is fixedly arranged on the front wheel frame group, the rear end of the bottom surface of the cushion is hinged with the guide pipe fitting, a moving part is movably sleeved on the guide pipe fitting between the cushion and the front wheel frame group, the moving part is hinged with the upper end of the rear wheel frame group, a folding mechanism which enables the cushion and the rear wheel frame group to be folded towards the direction of the guide pipe fitting simultaneously is arranged on the moving part, a fixing mechanism which can fix the position of the moving part is arranged on the guide pipe fitting, a pipe sleeve is fixedly arranged on the moving part, a movable pipe fitting which can unlock the fixing mechanism and drive the folding mechanism is movably arranged in the pipe sleeve, the baby carriage can be folded rapidly by one hand through the folding mechanism, one hand can be liberated to take care of babies, and the stability of the baby carriage in an unfolding state can be ensured through the fixing mechanism.

Description

Folding baby carriage

Technical Field

The invention relates in particular to a folding stroller.

Background

In the period from birth to young children, the limbs of infants are not fully developed, so that the infants need to be assisted in life by a plurality of devices. For example, in order to provide a baby that cannot walk for a long time or can assist in moving while learning to walk, the burden of holding hands of parents for a long time is reduced, and a baby carriage is an important device for a baby or a child at this stage.

The most interesting problem of the existing baby carriage is folding storage, because the baby carriage is large in size after being unfolded, the storage and the outgoing carrying are inconvenient, so that folding functions are needed, the folding procedure of the baby carriage with the folding functions on the market at present is complex, folding can be realized only by two-hand operation, folding effects are poor, pushing and pulling are not convenient after folding, folding or folding efficiency is low due to the fact that a certain of backrest chairs with guardrails and adjustable angles cannot be realized, and operation is complex.

Accordingly, further improvements are needed in the existing pushchairs.

Disclosure of Invention

Aiming at the defects existing in the prior art, the technical problems to be solved by the invention are as follows: the baby carriage can be folded rapidly by one hand, and the folded baby carriage is compact and reasonable in layout and convenient to carry and pull.

The utility model provides a folding perambulator, includes preceding wheel carrier group, back wheel carrier group and cushion fixed being provided with the direction pipe fitting on the preceding wheel carrier group, cushion bottom surface rear end department is articulated mutually with the direction pipe fitting, the movable sleeve is equipped with the moving part between being located cushion and the preceding wheel carrier group on the direction pipe fitting, the moving part is articulated mutually with back wheel carrier group upper end be equipped with on the moving part through removing the folding mechanism that moving part made cushion and back wheel carrier group folding to direction pipe fitting direction simultaneously be equipped with the fixed establishment that can fix the moving part position on the direction pipe fitting the fixed pipe sleeve that is equipped with on the moving part the pipe sleeve internalization is equipped with the movable pipe fitting that can unlock fixed establishment and drive folding mechanism.

Further, the folding mechanism comprises a first connecting rod hinged between the front end of the bottom surface of the seat cushion and the moving part, and a second connecting rod is hinged between the upper end part of the guide pipe fitting and the middle part of the rear wheel frame group.

Further, the fixing mechanism comprises a first guide shell arranged on the inner wall of the guide pipe fitting and close to the upper end, a first clamping pin is movably arranged in the first guide shell, the first clamping pin moves along the length direction perpendicular to the guide pipe fitting, a first spring is arranged between the inner end of the first clamping pin and the guide pipe fitting, a first clamping groove is formed in the position, corresponding to the first clamping pin, of the pipe sleeve, the first clamping pin is matched with the first clamping groove, a first inclined guide surface is symmetrically arranged at the outer end of the first clamping pin, and a first inclined jacking block capable of enabling the first clamping pin to move towards the direction of the first spring is arranged at the position, corresponding to the first inclined guide surface, of the lower end of the movable pipe fitting.

Further, the fixing mechanism comprises a guide cavity arranged in the moving part, a second bayonet lock is movably arranged in the guide cavity, the second bayonet lock moves along the length direction perpendicular to the guide pipe fitting, a second inclined guide surface is symmetrically arranged at the outer end of the second bayonet lock, an inner cavity is arranged in the second bayonet lock, a convex column inserted in the inner cavity is arranged on the guide cavity, a second spring is arranged between the inner cavity and the convex column, a limiting plate is fixedly arranged at the position of the guide pipe fitting corresponding to the second bayonet lock, a second clamping groove corresponding to the position of the second bayonet lock is arranged on the limiting plate, a yielding groove is formed at the position of the pipe sleeve corresponding to the second bayonet lock, and a second inclined jacking block capable of enabling the second bayonet lock to move towards the second spring is arranged at the position of the lower end of the movable pipe fitting corresponding to the second inclined guide surface.

Further, be equipped with the second that can fix the removal pipe fitting position and have and prevent mistake and touch the unblock and lock the mechanism, the second is locked the mechanism and is equipped with the second direction casing including setting up a plurality of third draw-in grooves that set up along axial equipartition in pipe fitting one side, it is equipped with the second to remove the pipe fitting near the lower extreme the horizontal activity is equipped with the third bayonet lock on the second direction casing vertical activity is equipped with the ascending first oblique guide block of inclined plane on the second direction casing, be equipped with the third spring between first oblique guide block upper end and the second direction casing, be equipped with the second oblique guide block on the corresponding position of third bayonet lock and first oblique guide block, the inclined plane of first oblique guide block is prepared with the inclined plane of second oblique guide block, the position that removes the pipe fitting near the upper end is equipped with the handle mounting, it has the pressing plate to articulate on the handle mounting, be equipped with the fourth spring between pressing plate inboard and the handle mounting, the articulated department is equipped with the drive assembly that drives first oblique upward movement, be equipped with the promotion piece on the handle mounting vertically be equipped with the restriction piece inboard and be equipped with the fourth spring between the fourth direction that is equipped with the fourth spring to the handle mounting.

Further, the driving assembly comprises a swinging rod arranged at the hinge of the pressing plate, and a first stay rope is arranged between the swinging rod and the first oblique guide block.

Further, a backrest is hinged to the rear end of the seat cushion, U-shaped guardrails are hinged to two sides of the backrest, and a linkage mechanism capable of adjusting the backrest at multiple angles and rapidly folding the backrest and the U-shaped guardrails is arranged on the seat cushion.

Further, the link gear is including articulating the third connecting rod between U-shaped guardrail middle part and cushion front end, the articulated department of cushion and back is equipped with first gear shape chamber and second gear shape chamber respectively, first gear shape intracavity activity is equipped with first gear, be equipped with the sixth spring between first gear shape chamber lie in the back the horizontal activity in first gear outside be equipped with the decurrent third oblique guide block of inclined plane lie in the vertical activity in third oblique guide block outside be equipped with the fourth oblique guide block in the back, the inclined plane of third oblique guide block is prepared with the inclined plane of fourth oblique guide block the back is equipped with the third direction casing vertical activity is equipped with the press piece on the third direction casing, press and be connected with the second stay cord between the fourth oblique guide block of piece both ends and both sides respectively.

Further, a clamping mechanism for preventing the rear wheel frame group from being turned and opened in a folded state is arranged between the movable piece and the rear wheel frame group, the clamping mechanism comprises a protruding block arranged on the movable piece and positioned at the hinge position of the rear wheel frame group and the movable piece, an elastic clamping piece is arranged at the position, corresponding to the protruding block, of the rear wheel frame group, and the protruding block and the elastic clamping piece are prepared.

Further, the front wheel frame group comprises a front wheel frame and a front wheel arranged on the front wheel frame, the guide pipe fitting is fixedly arranged on the front wheel frame, the rear wheel frame group comprises a rear wheel frame and a rear wheel arranged on the rear wheel frame, the moving piece is hinged with the upper end of the rear wheel frame, and the awning is detachably arranged on the third guide shell.

In summary, compared with the prior art, the invention has the following beneficial effects:

According to the folding baby carriage, the folding mechanism is arranged, so that the baby carriage can be folded quickly by one hand, one hand can be liberated to take care of babies, the stability of the baby carriage in the unfolded state can be ensured by the fixing mechanism, the clamping mechanism can prevent the baby carriage from being unfolded by itself in the lifting process after being folded, the backrest angle can be adjusted by one hand through the linkage mechanism, the guardrail and the backrest can be folded quickly, the folded baby carriage is compact in structure, the size can be greatly reduced, the unfolding and folding are convenient and quick, the structure is simple, and the use is convenient.

Drawings

FIG. 1 is a schematic perspective view of the invention in an expanded state;

FIG. 2 is an exploded perspective view of the present invention in its deployed state;

FIG. 3 is a schematic cross-sectional view of a first embodiment of the securing mechanism of the present invention;

FIG. 4 is a schematic cross-sectional view of a two-way lock mechanism of the present invention;

FIG. 5 is an exploded perspective view of the two-way lock mechanism of the present invention;

FIG. 6 is a schematic cross-sectional view of a second embodiment of the securing mechanism of the present invention;

FIG. 7 is an enlarged schematic view of the invention at A in FIG. 1;

FIG. 8 is an enlarged schematic view of the present invention at B in FIG. 2;

FIG. 9 is an enlarged schematic view of the invention at C in FIG. 3;

FIG. 10 is an enlarged schematic view of the invention at D in FIG. 4;

FIG. 11 is an enlarged schematic view of FIG. 5E in accordance with the present invention;

FIG. 12 is an enlarged schematic view of the invention at F in FIG. 5;

FIG. 13 is an enlarged schematic view of the invention at G in FIG. 6;

fig. 14 is a perspective view showing a folded state of the present invention.

Detailed Description

The invention is further described in the following description and detailed description with reference to the drawings:

As shown in fig. 1 to 14, an embodiment of the present invention preferably provides a folding stroller, including a front wheel frame set 1, a rear wheel frame set 10 and a seat cushion 11, wherein a guide tube 12 is fixedly disposed on the front wheel frame set 1, a moving member 13 is movably sleeved between the seat cushion 11 and the front wheel frame set 1 on the guide tube 12, the moving member 13 is hinged with the upper end of the rear wheel frame set 10, a folding mechanism 2 for simultaneously folding the seat cushion 11 and the rear wheel frame set 10 towards the direction of the guide tube 12 by moving the moving member 13 is disposed on the moving member 13, a tube sleeve 14 is fixedly disposed on the moving member 13, a moving tube 15 capable of unlocking the fixing mechanism 3 and driving the folding mechanism 2 is movably disposed in the tube sleeve 14, the stroller can be quickly folded by one hand by being provided with the folding mechanism, one hand can be released, the stroller can be ensured to be folded in a stable state by the fixing mechanism, the folding mechanism can be conveniently and quickly folded by one hand, the backrest can be conveniently folded by adjusting the folding mechanism, and the size of the stroller can be conveniently reduced by adjusting the folding mechanism.

One embodiment of the folding mechanism 2 of the present invention: the folding seat cushion comprises a first connecting rod 20 hinged between the front end of the bottom surface of the seat cushion 11 and a moving part 13, a second connecting rod 21 is hinged between the upper end part of a guide pipe fitting 12 and the middle part of a rear wheel frame group 10, and the moving part 13 drives one ends of the first connecting rod 20 and the second connecting rod 21 to move by pushing the moving part 13 downwards, so that the other ends of the first connecting rod 20 and the second connecting rod 21 drive the seat cushion 11 and the rear wheel frame group 10 to overturn towards the guide pipe fitting 12, and the folding function is realized.

First embodiment of the fixing mechanism 3 in the present invention: the telescopic pipe fitting comprises a first guide shell 30 arranged on the inner wall of a guide pipe fitting 12 and close to the upper end, a first clamping pin 31 is movably arranged in the first guide shell 30, the first clamping pin 31 moves along the length direction perpendicular to the guide pipe fitting 12, a first spring 32 is arranged between the inner end of the first clamping pin 31 and the guide pipe fitting 12, a first clamping groove 33 is arranged at the position corresponding to the pipe sleeve 14 and the first clamping pin 31, the first clamping pin 31 and the first clamping groove 33 are configured, a first inclined guide surface 34 is symmetrically arranged at the outer end of the first clamping pin 31, a first inclined jacking block 35 which enables the first clamping pin 31 to move towards the direction of the first spring 32 is arranged at the position corresponding to the first inclined guide surface 34 at the lower end of the moving pipe fitting 15, after the first clamping groove 33 corresponds to the first clamping pin 31 in position through upward pulling of the moving piece 13, the first clamping pin 31 is clamped into the first clamping groove 33 through the acting force of the first spring 32, so that the first clamping piece 13 is fixed, the expansion state of the fast locking baby carriage is played, the moving pipe fitting 15 downwards moves downwards, the first clamping pin 31 is enabled to move forwards the first clamping pin 31 to move forwards along the first inclined guide surface 33 through the first inclined guide surface 35, and the first clamping pin 33 is enabled to move downwards, and the first clamping pin 31 is enabled to move downwards, and further, and the first clamping piece is enabled to move upwards and move upwards, and the first clamping piece 33 is enabled to move upwards and move upwards along the first clamping piece 33.

Second embodiment of the fixing mechanism 3 in the present invention: comprises a guide cavity 101 arranged in a moving part 13, a second bayonet lock 102 is movably arranged in the guide cavity 101, the second bayonet lock 102 moves along the length direction vertical to a guide pipe fitting 12, a second inclined guide surface 103 is symmetrically arranged at the outer end of the second bayonet lock 102, an inner cavity 104 is arranged in the second bayonet lock 102, a convex column 105 inserted in the inner cavity 104 is arranged on the guide cavity 101, a second spring 106 is arranged between the inner cavity 104 and the convex column 105, a limiting plate 107 is fixedly arranged at the position of the guide pipe fitting 12 corresponding to the second bayonet lock 102, a second clamping groove 108 corresponding to the position of the second bayonet lock 102 is arranged on the limiting plate 107, the second bayonet lock 102 is matched with the second clamping groove 108, a yielding groove 109 is arranged at the position of the pipe sleeve 14 corresponding to the second bayonet lock 102, the lower end of the moving pipe fitting 15 is provided with a second inclined jacking block which can enable the second bayonet lock 102 to move towards the second spring 106, after the second bayonet lock 108 corresponds to the second bayonet lock 102 in position by pulling the moving part 13 upwards, the second bayonet lock 102 is clamped into the second bayonet lock 108 and the second bayonet lock 102 by the acting force of the second spring 106, so that the moving part 13 is fixed, the unfolding state of the stroller is locked rapidly, the moving pipe fitting 15 is moved downwards, the second bayonet lock 102 is pushed towards the second inclined guiding surface 103 by the second inclined jacking block, the second bayonet lock 102 is moved towards the second spring 106, the second bayonet lock 102 is separated from the second bayonet lock 108, the moving pipe fitting 15 is moved continuously, and the moving part 13 is driven to move downwards, so that the folding effect is realized.

The invention is provided with a two-way locking mechanism 4 which can fix the position of a movable pipe fitting 15 and is provided with anti-false unlocking, the two-way locking mechanism 4 comprises a plurality of third clamping grooves 40 which are uniformly distributed on one side of the pipe fitting 14 along the axial direction, a second guiding shell 41 is arranged near the lower end of the movable pipe fitting 15, a third clamping pin 42 is transversely and movably arranged on the second guiding shell 41, a first inclined guide block 43 with an upward inclined surface is vertically and movably arranged on the second guiding shell 41, a third spring 401 is arranged between the upper end of the first inclined guide block 43 and the second guiding shell 41, a second inclined guide block 44 is arranged at the position of the third clamping pin 42 corresponding to the first inclined guide block 43, the inclined surface of the first inclined guide block 43 is matched with the inclined surface of the second inclined guide block 44, a handle fixing piece 45 is arranged at the position of the movable pipe fitting 15 near the upper end, a pressing plate 46 is hinged on the handle fixing piece 45, a fourth spring 47 is arranged between the inner side of the pressing plate 46 and the handle fixing piece 45, a driving component 5 for driving the first inclined guide block 43 to move upwards is arranged at the hinged position of the pressing plate 46, a pushing piece 48 is vertically arranged on the handle fixing piece 45, a limiting block 49 for limiting the pressing plate 46 to turn over towards the fourth spring 47 is fixedly arranged on the inner side of the pushing piece 48, a fifth spring 400 is arranged between the bottom surface of the pushing piece 48 and the handle fixing piece 45, the two-way lock mechanism 4 has the function of preventing false touch, unlocking can be realized by moving the pushing piece 48 towards the fifth spring 400 and moving the pressing plate 46 towards the fourth spring 47 at the same time, the function of moving the pushing piece 48 towards the fifth spring 400 is to enable the limiting block 49 for limiting the pressing plate 46 to turn over towards the fourth spring 47 to leave the movable range of the pressing plate 46, the pressing plate 46 can turn over towards the fourth spring 47, by overturning, the swing rod 50 pulls the first pull rope 51, so that the first inclined guide block 43 moves upwards, the second inclined guide block 44 moves transversely, the second bayonet lock 42 is separated from the second bayonet groove 40, the moving pipe fitting 15 is moved, and the first inclined guide block 43 is reset through the third spring 401.

First embodiment of the drive assembly 5 in the present invention: the first pull rope 51 is arranged between the swing rod 50 and the first inclined guide block 43, and the swing rod 50 is turned upwards, so that the first pull rope 51 is pulled to enable the first inclined guide block 43 to move upwards.

Second embodiment of the drive assembly 5 in the present invention: the device comprises a swing rod 50 arranged at the hinge joint of the pressing plate 46, a fourth connecting rod is hinged between the swing rod 50 and the first inclined guide block 43, and the fourth connecting rod is used for lifting the first inclined guide block 43 by turning the swing rod 50 upwards.

According to the invention, the backrest 16 is hinged at the rear end part of the cushion 11, the U-shaped guardrails 17 are hinged at the two sides of the backrest 16, the linkage mechanism 6 which can adjust the backrest 16 at multiple angles and can rapidly fold the backrest 16 and the U-shaped guardrails 17 is arranged on the cushion 11, and the backrest 16 is arranged to enable an infant to be more comfortable, and the U-shaped guardrails 17 prevent the infant from falling to the ground, so that the danger is reduced.

First embodiment of the linkage mechanism 6 in the present invention: comprises a third connecting rod 60 hinged between the middle part of a U-shaped guardrail 17 and the front end of a cushion 11, a first gear-shaped cavity 61 and a second gear-shaped cavity 62 are respectively arranged at the hinged part of the cushion 11 and a backrest 16, a first gear 63 is movably arranged in the first gear-shaped cavity 61, a sixth spring 64 is arranged between the first gear 63 and the first gear-shaped cavity 61, a third inclined guide block 65 with downward inclined surface is horizontally and movably arranged at the outer side of the first gear 63 in the backrest 16, a fourth inclined guide block 66 is vertically and movably arranged at the outer side of the third inclined guide block 65 in the backrest 16, the inclined surface of the third inclined guide block 65 is matched with the inclined surface of the fourth inclined guide block 66, a third guide shell 67 is arranged at the back of the backrest 16, a pressing block 68 is vertically and movably arranged on the third guide shell 67, two ends of the pressing block 68 are respectively connected with the fourth inclined guide blocks 66 at two sides, the first gear 63 is simultaneously arranged in the first gear-shaped cavity 61 and the second gear-shaped cavity 62 under the action of the sixth spring 64, when the backrest is required to be folded, the pressing block 68 is lifted upwards to separate the first gear 63 from the second gear-shaped cavity 62, and after the angle is adjusted, the pressing block 68 is released by lifting the pressing block 68 upwards to separate the first gear 63 from the second gear-shaped cavity 62, the first gear 63 moves into the first gear-shaped cavity 61 and the second gear-shaped cavity 62 by the sixth spring 64, and functions to lock the angle of the backrest 16.

Second embodiment of the linkage mechanism 6 in the present invention: the seat cushion is characterized by comprising a fifth connecting rod hinged between the middle of the U-shaped guardrail 17 and the front end of the seat cushion 11, a third gear-shaped cavity and a fourth gear-shaped cavity are respectively arranged at the hinged positions of the seat cushion 11 and the backrest 16, a second gear is movably arranged in the third gear-shaped cavity, a seventh spring is arranged between the second gear and the third gear-shaped cavity, keys capable of enabling the second gear to move towards the seventh spring are movably arranged at the hinged positions of the backrest 16, the second gear is simultaneously arranged in the third gear-shaped cavity and the fourth gear-shaped cavity through the action of the seventh spring, when the seat cushion 11 and the backrest 16 need to be folded, the keys at two sides are simultaneously pressed to enable the second gear to completely move into the third gear-shaped cavity, the backrest 16 can be folded in an overturning mode, the U-shaped guardrail 17 and the fifth connecting rod are simultaneously folded, the space is saved, and when the angle of the backrest 16 needs to be adjusted, the keys at two sides are simultaneously pressed, the second gear is completely moved into the third gear-shaped cavity, so that the angle of the keys 16 is adjusted, and the angle of the backrest 16 is enabled to be locked by the third gear-shaped cavity through the springs.

The invention discloses a clamping mechanism 7 for preventing the rear wheel frame set 10 from being turned and unfolded in a folding state is arranged between a moving part 13 and a rear wheel frame set 10, the clamping mechanism 7 comprises a protruding block 70 arranged on the moving part 13 and positioned at the hinge joint of the rear wheel frame set 10 and the moving part 13, an elastic clamping piece 71 is arranged at the position of the rear wheel frame set 10 corresponding to the protruding block 70, the protruding block 70 is matched with the elastic clamping piece 71 after folding, the protruding block 70 is matched and clamped with the elastic clamping piece 71, the automatic unfolding of the baby carriage in the lifting and pulling process after the baby carriage is prevented, and meanwhile, the baby carriage can be unfolded only by applying upward force to a moving pipe 15, so that the effect of convenience in use is achieved.

The invention comprises a front wheel frame 90 and a front wheel 91 arranged on the front wheel frame 90, the guide pipe fitting 12 is fixedly arranged on the front wheel frame 90, the rear wheel frame group 10 comprises a rear wheel frame 92 and a rear wheel 93 arranged on the rear wheel frame 92, the movable piece 13 is hinged with the upper end of the rear wheel frame 92, the awning 80 is detachably arranged on the third guide shell 67, and the awning 80 is detachably arranged to play a role of outdoor sun protection.

While there has been shown and described what is at present considered to be the fundamental principles and the main features of the invention and the advantages thereof, it will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, but is described in the foregoing description merely illustrates the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as hereinafter claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a foldable perambulator, includes preceding wheel carrier group, back wheel carrier group and cushion, its characterized in that: the front wheel frame group is fixedly provided with a guide pipe fitting, the rear end of the bottom surface of the cushion is hinged with the guide pipe fitting, a moving part is movably sleeved between the cushion and the front wheel frame group on the guide pipe fitting, the moving part is hinged with the upper end of the rear wheel frame group, the moving part is provided with a folding mechanism which enables the cushion and the rear wheel frame group to be folded towards the direction of the guide pipe fitting simultaneously by moving the moving part, the guide pipe fitting is provided with a fixing mechanism capable of fixing the position of the moving part, the moving part is fixedly provided with a pipe sleeve, the pipe sleeve is movably provided with a moving pipe fitting which can unlock the fixing mechanism and drive the folding mechanism, The folding mechanism comprises a first connecting rod hinged between the front end of the bottom surface of the cushion and the moving part, a second connecting rod is hinged between the upper end of the guide pipe fitting and the middle part of the rear wheel frame group, the fixing mechanism comprises a first guide shell arranged on the inner wall of the guide pipe fitting and close to the upper end, a first bayonet lock is movably arranged in the first guide shell and moves along the length direction vertical to the guide pipe fitting, a first spring is arranged between the inner end of the first bayonet lock and the guide pipe fitting, a first clamping groove is arranged at the position corresponding to the pipe sleeve and the first bayonet lock, the first bayonet lock is matched with the first clamping groove, a first inclined guide surface is symmetrically arranged at the outer end of the first bayonet lock, the lower end of the movable pipe fitting is provided with a first inclined jacking block which can enable the first bayonet lock to move towards the direction of the first spring, the fixing mechanism comprises a guide cavity arranged in the movable piece, a second bayonet lock is movably arranged in the guide cavity, the second bayonet lock moves along the length direction vertical to the guide pipe fitting, the outer end of the second bayonet lock is symmetrically provided with a second inclined guiding surface, an inner cavity is arranged in the second bayonet lock, a convex column which is inserted in the inner cavity is arranged on the guide cavity, a second spring is arranged between the inner cavity and the convex column, a limiting plate is fixedly arranged at the position of the guide pipe fitting corresponding to the second bayonet lock, a second clamping groove corresponding to the position of the second bayonet lock is arranged on the limiting plate, The second bayonet lock is prepared with a second bayonet lock groove, a position of the pipe sleeve corresponding to the second bayonet lock is provided with a yielding groove, a position of the lower end of the movable pipe fitting corresponding to the second inclined guide surface is provided with a second inclined jacking block which can enable the second bayonet lock to move towards a second spring direction, the pipe sleeve is provided with a second locking mechanism which can fix the position of the movable pipe fitting and prevent false touch unlocking, the second locking mechanism comprises a plurality of third bayonet lock grooves which are uniformly distributed on one side of the pipe sleeve along the axial direction, the movable pipe fitting is provided with a second guide shell close to the lower end, the second guide shell is transversely movably provided with a third bayonet lock, the second guide shell is vertically movably provided with a first inclined guide block with an upward inclined surface, A third spring is arranged between the upper end of the first inclined guide block and the second guide shell, a second inclined guide block is arranged at the position of the third bayonet lock corresponding to the first inclined guide block, the inclined surface of the first inclined guide block and the inclined surface of the second inclined guide block are prepared, a handle fixing piece is arranged at the position of the movable pipe fitting close to the upper end, a pressing plate is hinged on the handle fixing piece, a fourth spring is arranged between the inner side of the pressing plate and the handle fixing piece, a driving assembly for driving the first inclined guide block to move upwards is arranged at the hinged position of the pressing plate, a pushing piece is vertically arranged on the handle fixing piece, a limiting block for limiting the pressing plate to turn towards the fourth spring is fixedly arranged on the inner side of the pushing piece, A fifth spring is arranged between the bottom surface of the pushing piece and the handle fixing piece.

2. A pushchair according to claim 1, wherein: the driving assembly comprises a swing rod arranged at the hinge of the pressing plate, and a first stay rope is arranged between the swing rod and the first inclined guide block.

3. A pushchair according to claim 2, wherein: the back end of the cushion is hinged with a backrest, two sides of the backrest are hinged with U-shaped guardrails, and the cushion is provided with a linkage mechanism which can adjust the backrest at multiple angles and can rapidly fold the backrest and the U-shaped guardrails.

4. A pushchair according to claim 3, wherein: the linkage mechanism comprises a third connecting rod hinged between the middle of the U-shaped guardrail and the front end of the cushion, a first gear-shaped cavity and a second gear-shaped cavity are respectively arranged at the hinged positions of the cushion and the backrest, a first gear is movably arranged in the first gear-shaped cavity, a sixth spring is arranged between the first gear and the first gear-shaped cavity, a third inclined guide block with a downward inclined surface is transversely movably arranged on the outer side of the first gear in the backrest, a fourth inclined guide block is vertically movably arranged on the outer side of the third inclined guide block in the backrest, the inclined surface of the third inclined guide block is matched with the inclined surface of the fourth inclined guide block, a third guide shell is arranged on the back of the backrest, a pressing block is vertically movably arranged on the third guide shell, and two ends of the pressing block are respectively connected with a second pull rope between the fourth inclined guide blocks on two sides.

5. A pushchair according to claim 4, wherein: the movable part is provided with a rear wheel frame group, a rear wheel frame group is arranged on the movable part, a clamping mechanism for preventing the rear wheel frame group from being turned and opened in a folded state is arranged between the movable part and the rear wheel frame group, the clamping mechanism comprises a protruding block arranged on the movable part and positioned at the hinge joint of the rear wheel frame group and the movable part, an elastic clamping piece is arranged at the position, corresponding to the protruding block, of the rear wheel frame group, and the protruding block is matched with the elastic clamping piece.

6. A pushchair according to claim 5, wherein: the front wheel frame group comprises a front wheel frame and front wheels arranged on the front wheel frame, the guide pipe fitting is fixedly arranged on the front wheel frame, the rear wheel frame group comprises a rear wheel frame and rear wheels arranged on the rear wheel frame, the moving part is hinged with the upper end of the rear wheel frame, and the awning is detachably arranged on the third guide shell.