CN210555067U

CN210555067U - Folding baby carriage

Info

Publication number: CN210555067U
Application number: CN201921568341.3U
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: 2020-05-19
Anticipated expiration: 2029-09-20

Abstract

The utility model discloses a folding baby carriage, which comprises a front wheel frame group, a rear wheel frame group and a cushion, a guide pipe fitting is fixedly arranged on the front wheel carrier group, the rear end of the bottom surface of the cushion is hinged with the guide pipe fitting, a moving piece is movably sleeved between the cushion and the front wheel carrier group on the guide pipe fitting, the moving piece is hinged with the upper end of the rear wheel carrier group, a folding mechanism which can fold the cushion and the rear wheel carrier group towards the direction of the guide pipe fitting by moving the moving piece is arranged on the moving piece, a fixing mechanism capable of fixing the position of a moving part is arranged on the guide pipe fitting, a pipe sleeve is fixedly arranged on the moving part, the baby stroller is characterized in that a movable pipe fitting capable of unlocking the fixing mechanism and driving the folding mechanism is movably arranged in the pipe sleeve, the baby stroller can be folded rapidly by one hand through the folding mechanism, one hand can be released to take care of the baby, and the stability of the baby stroller in the unfolding state can be ensured through the fixing mechanism.

Description

Folding baby carriage

Technical Field

The utility model particularly relates to a foldable perambulator.

Background

From birth to infancy, infants need to be assisted by many devices because their limbs are not well developed. For example, in order to provide a baby stroller that can not be used for a long time or can assist movement when a baby walking for learning goes out, and reduce the burden of holding the baby stroller in hands for a long time, the baby stroller is an important tool when the baby or the baby goes out at this stage.

The problem that present perambulator is most concerned with is folding accomodate, because the perambulator is bulky after the exhibition, it is all inconvenient to lead to depositing and go out to carry, thereby need folding function, the folding process of perambulator that has folding function on the existing market is complicated, and it just can realize folding to still need both hands to operate, folding effect is poor, folding push-and-pull also be convenient for after folding, some take the guardrail and can angle regulation's back chair can't realize folding or folding inefficiency in addition, the operation is complicated.

Accordingly, there is a need for further improvements in existing pushchairs.

SUMMERY OF THE UTILITY MODEL

To the defect that above-mentioned prior art exists, the to-be-solved technical problem of the utility model is: the baby carriage can be folded by one hand quickly, and is compact and reasonable in layout and convenient to carry and pull.

The utility model provides a foldable perambulator, includes front wheel frame group, back wheel carrier group and cushion the fixed direction pipe fitting that is provided with in front wheel frame group, cushion bottom surface rear end department is articulated mutually with the pipe fitting that leads, it is equipped with the moving member to lie in the movable sleeve between cushion and front wheel carrier group on the direction pipe fitting, the moving member is articulated with back wheel carrier group upper end be equipped with on the moving member and make cushion and back wheel carrier group folding mechanism to the pipe fitting direction simultaneously through removing the moving member be equipped with the fixed establishment that can fix the moving member position on the direction pipe fitting the fixed pipe box that is equipped with on the moving member the pipe box internalization is equipped with the movable pipe fitting that unlocks fixed establishment and drive folding mechanism.

Furthermore, folding mechanism includes and articulates the first connecting rod between cushion bottom surface front end and moving member, it has the second connecting rod to articulate between the middle part of upper end of direction pipe fitting and rear wheel carrier group.

Further, fixed establishment is including setting up at the first direction casing that the pipe fitting inner wall is close to the upper end of leading the first direction casing the activity is equipped with first bayonet lock in the first direction casing, first bayonet lock removes along the length direction of perpendicular to direction pipe fitting, be equipped with first spring between first bayonet lock inner and the direction pipe fitting be equipped with first draw-in groove on the pipe box and the corresponding position of first bayonet lock, first bayonet lock is prepared mutually with first draw-in groove, first bayonet lock outer end symmetry is equipped with first slope guide surface, it is equipped with the first oblique kicking block that enables first bayonet lock to remove to first spring direction to remove the pipe fitting lower extreme and the corresponding position of first slope guide surface.

Furthermore, the fixing mechanism comprises a guide cavity arranged in the moving piece, a second bayonet lock is movably arranged in the guide cavity and moves along the length direction vertical to the guide pipe piece, the outer end of the second bayonet lock is symmetrically provided with a second inclined guide surface, 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 position of the guide pipe fitting corresponding to the second clamping pin is fixedly provided with a limiting plate, the limiting plate is provided with a second clamping groove corresponding to the second clamping pin, the second bayonet lock is matched with the second bayonet lock groove, the position of the pipe sleeve corresponding to the second bayonet lock is provided with a yielding groove, and a second inclined ejector block which can enable the second clamping pin to move towards the direction of the second spring is arranged at the position, corresponding to the second inclined guide surface, of the lower end of the movable pipe fitting.

Furthermore, the pipe sleeve is provided with a second lock mechanism which can fix the position of the movable pipe and has a function of preventing mistaken touch and unlocking, the second lock mechanism comprises a plurality of third clamping grooves which are uniformly distributed on one side of the pipe sleeve along the axial direction, the movable pipe is provided with a second guide shell body near the lower end, third clamping pins are transversely and movably arranged on the second guide shell body, a first inclined guide block with an upward inclined surface is vertically and movably arranged on the second guide shell body, a third spring is arranged between the upper end of the first inclined guide block and the second guide shell body, a second inclined guide block is arranged at the position, corresponding to the first inclined guide block, of the third clamping pin, the inclined surface of the first inclined guide block is matched with the inclined surface of the second inclined guide block, the movable pipe is provided with a handle fixing piece near the upper end, a pressing plate is hinged on the handle fixing piece, and a fourth spring is arranged between the inner side of the pressing plate and the handle fixing piece, the handle fixing piece is provided with a first inclined guide block, the handle fixing piece is provided with a second inclined guide block, the pressing plate is hinged to the handle fixing piece, the first inclined guide block is arranged on the pressing plate, the second inclined guide block is hinged to the pressing plate, the handle fixing piece is vertically provided with a pushing piece, a limiting block for limiting the pressing plate to turn towards the direction of a fourth spring is fixedly arranged on the inner side of the pushing piece, and a fifth spring is.

Furthermore, the driving assembly comprises a swing rod arranged at the hinged position of the pressing plate, and a first pull rope is arranged between the swing rod and the first inclined guide block.

Furthermore, the end part 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 in multiple angles and can quickly fold the backrest and the U-shaped guardrails.

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 chamber and second gear chamber respectively, first gear shape intracavity activity is equipped with first gear, be equipped with the sixth spring between first gear and the first gear chamber lie in the horizontal activity in the first gear outside in the back and be equipped with the third oblique guide block that the inclined plane is downward lie in the vertical activity in the third oblique guide block outside in the back and be equipped with the fourth oblique guide block, the inclined plane of third oblique guide block is prepared mutually with the inclined plane of fourth oblique guide block the back is equipped with third direction casing vertical activity is equipped with the press block on the third direction casing, press block both ends respectively with the fourth oblique guide block of both sides between be connected with the second stay cord.

Furthermore, be equipped with between moving member and the back wheel carrier group and prevent that back wheel carrier group from opening the screens mechanism in fold condition upset, screens mechanism is including setting up the lug that is located the articulated department of back wheel carrier group and moving member on the moving member, be equipped with the elasticity fastener on the corresponding position of back wheel carrier group and lug, the lug is prepared mutually with the elasticity fastener.

Furthermore, the front wheel frame assembly 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 assembly comprises a rear wheel frame and rear wheels arranged on the rear wheel frame, the moving member is hinged to the upper end of the rear wheel frame, and the awning is detachably mounted on the third guide shell.

To sum up, the utility model discloses for its beneficial effect of prior art is:

the utility model discloses a be equipped with folding mechanism and can singlehanded fold the perambulator fast, can release a hand and look after the baby, can ensure the steadiness of perambulator at the expansion state through fixed establishment, screens mechanism can prevent that the perambulator from folding back and oneself expanding at the process of carrying and pulling, linkage mechanism can adjust the back angle through one-hand operation and can be quick fold guardrail and back, perambulator compact structure after folding, the volume of reducing that can be great, expand and folding convenient and fast, and simple structure, high durability and convenient use.

Drawings

Fig. 1 is a perspective view of the present invention in an expanded state;

fig. 2 is an exploded perspective view of the present invention in an expanded state;

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

FIG. 4 is a schematic cross-sectional view of a second locking mechanism of the present invention;

FIG. 5 is an exploded perspective view of the second locking mechanism of the present invention;

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

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

fig. 8 is an enlarged schematic view of fig. 2 at B according to the present invention;

fig. 9 is an enlarged schematic view of fig. 3 at C according to the present invention;

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

fig. 11 is an enlarged schematic view of fig. 5 at E according to the present invention;

fig. 12 is an enlarged schematic view of fig. 5 at F according to the present invention;

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

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

Detailed Description

The invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings:

as shown in fig. 1 to 14, an embodiment of the present invention preferably provides a foldable stroller, which includes a front wheel frame assembly 1, a rear wheel frame assembly 10 and a seat cushion 11, wherein a guiding tube 12 is fixedly disposed on the front wheel frame assembly 1, the rear end of the bottom surface of the seat cushion 11 is hinged to the guiding tube 12, a movable member 13 is movably sleeved on the guiding tube 12 between the seat cushion 11 and the front wheel frame assembly 1, the movable member 13 is hinged to the upper end of the rear wheel frame assembly 10, a folding mechanism 2 for folding the seat cushion 11 and the rear wheel frame assembly 10 toward the guiding tube 12 simultaneously by moving the movable member 13 is disposed on the movable member 13, a fixing mechanism 3 capable of fixing the position of the movable member 13 is disposed on the guiding tube 12, a sleeve 14 is fixedly disposed on the movable member 13, a movable tube 15 for unlocking the fixing mechanism 3 and driving the folding mechanism 2 is movably disposed in the sleeve 14, can singlehanded fold the perambulator fast through being equipped with folding mechanism, can release a hand and look after the baby, can ensure the steadiness of perambulator at the expansion state through fixed establishment, screens mechanism can prevent that the perambulator from folding back and oneself expanding at the process of carrying and pulling, linkage mechanism can adjust the back angle and can be quick fold guardrail and back through the one-hand operation, perambulator compact structure after folding, can be great reduce the volume, expand and folding convenient and fast, moreover, the steam generator is simple in structure, high durability and convenient use.

The utility model discloses an embodiment of well folding mechanism 2: including articulating the first connecting rod 20 between 11 bottom front ends and the moving member 13 in the cushion, it has second connecting rod 21 to articulate between the upper end of direction pipe fitting 12 and the middle part of back wheel carrier group 10, through pushing moving member 13 downwards, makes moving member 13 drive the one end removal of first connecting rod 20 and second connecting rod 21 to the other end that makes first connecting rod 20 and second connecting rod 21 drives cushion 11 and back wheel carrier group 10 to 12 direction upsets of direction pipe fitting, thereby plays folding effect.

The utility model discloses well fixed establishment 3's first embodiment: including setting up at the first direction casing 30 that the pipe fitting 12 inner wall is close to the upper end of leading, first direction casing 30 internalization is equipped with first bayonet lock 31, first bayonet lock 31 moves along the length direction of perpendicular to pipe fitting 12 that leads, be equipped with first spring 32 between first bayonet lock 31 inner and the pipe fitting 12, be equipped with first draw-in groove 33 on the pipe box 14 corresponds with first bayonet lock 31 the position, first bayonet lock 31 is prepared mutually with first draw-in groove 33, first bayonet lock 31 outer end symmetry is equipped with first oblique guide surface 34, the position that removes the pipe fitting 15 lower extreme and first oblique guide surface 34 corresponding is equipped with and enables first bayonet lock 31 to first spring 32 direction removal to one side kicking block 35, through upwards pulling moving member 13 make first draw-in groove 33 correspond with first bayonet lock 31 position after, first bayonet lock 31 is gone into in first draw-in groove 33 through the effort card of first spring 32, thereby fixed moving member 13 has played the expansion state of quick locking perambulator, moves moving pipe fitting 15 downwards, pushes up to first oblique leading face 34 direction through first oblique kicking block 35, makes first bayonet socket 33 move to first spring 32 direction, makes first bayonet socket 31 break away from first bayonet socket 33, continues to move moving pipe fitting 15, and then drives moving member 13 and moves downwards, realizes folding effect.

The utility model discloses well fixed establishment 3's second embodiment: including setting up direction chamber 101 in moving member 13 the activity is equipped with second bayonet lock 102 in direction chamber 101, second bayonet lock 102 removes along the length direction of perpendicular to direction pipe fitting 12 the outer end symmetry of second bayonet lock 102 is equipped with second oblique guide surface 103, be equipped with inner chamber 104 in second bayonet lock 102, be equipped with the projection 105 of interlude in inner chamber 104 on direction chamber 101, be equipped with second spring 106 between inner chamber 104 and the projection 105, fixed being equipped with limiting plate 107 on the position that direction pipe fitting 12 corresponds with second bayonet lock 102, be equipped with the second draw-in groove 108 corresponding with second bayonet lock 102 position on the limiting plate 107, second bayonet lock 102 is prepared mutually with second draw-in groove 108, be equipped with the groove of stepping down 109 on pipe box 14 and the corresponding position of second bayonet lock 102, the corresponding position of removal pipe fitting 15 lower extreme and second oblique guide surface 103 is equipped with and enables second bayonet lock 102 to the second oblique kicking block of second spring 106 direction removal, after the moving part 13 is pulled upwards to enable the second clamping groove 108 to correspond to the second clamping pin 102, the second clamping pin 102 is clamped into the second clamping groove 108 and the inner part through the acting force of the second spring 106, so that the moving part 13 is fixed, the unfolding state of the baby carriage is locked quickly, the pipe fitting 15 moves downwards, the second clamping pin 102 is pressed towards the second inclined guide surface 103 through the second inclined pressing block, the second clamping pin 102 moves towards the second spring 106, the second clamping pin 102 is separated from the second clamping groove 108, the pipe fitting 15 continues to move, the moving part 13 is driven to move downwards, and the folding effect is achieved.

The utility model is characterized in that the pipe sleeve 14 is provided with a second locking mechanism 4 which can fix the position of the movable pipe 15 and has the function of preventing the unlocking from being touched by mistake, the second locking mechanism 4 comprises a plurality of third clamping grooves 40 which are uniformly distributed on one side of the pipe sleeve 14 along the axial direction, the movable pipe 15 is close to the lower end and is provided with a second guide shell 41, the second guide shell 41 is provided with a third clamping pin 42 in a transverse movement way, the second guide shell 41 is provided with a first inclined guide block 43 with an upward inclined surface in a vertical movement way, a third spring 401 is arranged between the upper end of the first inclined guide block 43 and the second guide shell 41, the third clamping pin 42 is provided with a second inclined guide block 44 at the position 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, the movable fixing piece 15 is provided with a handle 45 at the position close to the upper end, the handle 45 is hinged with a pressing plate, a fourth spring 47 is arranged between the inner side of the pressing plate 46 and the handle fixing piece 45, a driving assembly 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 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 structure of the second lock mechanism 4 plays a role of preventing mistaken touch, unlocking can be realized only by simultaneously moving the pushing piece 48 towards the fifth spring 400 and moving the pressing plate 46 towards the fourth spring 47, the pushing piece 48 towards the fifth spring 400 plays a role of enabling the limiting block 49 for limiting the pressing plate 46 to turn towards the fourth spring 47 to leave the movable range of the pressing plate 46, so that the pressing plate 46 can turn towards the fourth spring 47 through turning, the swing link 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 clamping pin 42 is separated from the second clamping groove 40, the effect of moving the pipe fitting 15 is achieved, and the first inclined guide block 43 is reset through the third spring 401.

The utility model discloses well drive assembly 5's first embodiment: the device comprises a swing rod 50 arranged at the hinged position of a pressing plate 46, a 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 to pull the first pull rope 51 so as to enable the first inclined guide block 43 to move upwards.

The utility model discloses well drive assembly 5's second embodiment: the device comprises a swing rod 50 arranged at the hinged position of a pressing plate 46, a fourth connecting rod is hinged between the swing rod 50 and the first inclined guide block 43, and the swing rod 50 is turned upwards so that the fourth connecting rod can lift the first inclined guide block 43.

The utility model discloses cushion 11 back end articulates there is back 16 both sides articulate there is U-shaped guardrail 17 but be equipped with multi-angle adjustment back 16 and can fold the link gear 6 of back 16 and U-shaped guardrail 17 fast on the cushion 11, make the baby more comfortable through being equipped with back 16, U-shaped guardrail 17 prevents that the baby from falling to the ground, reduces dangerous emergence.

The utility model discloses well link gear 6's first embodiment: the backrest comprises a third connecting rod 60 hinged between the middle part of a U-shaped guardrail 17 and the front end of a seat cushion 11, a first gear-shaped cavity 61 and a second gear-shaped cavity 62 are respectively arranged at the hinged part of the seat 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 facing downwards is transversely 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 pressing block 67 is arranged at the back surface of the backrest 16, a third guide shell 68 is vertically and movably arranged on the third guide shell 67, and second pull ropes 69 are respectively connected between the two ends of the pressing block 68 and the fourth inclined guide blocks 66 at the two sides, the first gear 63 is simultaneously arranged in the first gear cavity 61 and the second gear cavity 62 under the action of the sixth spring 64, when the backrest needs to be folded, the pressing block 68 is lifted upwards, the second pull rope 69 pulls the fourth inclined guide block 66 to move upwards, so that the fourth inclined guide block 66 drives the third inclined guide block 65 to move towards the first gear 63 through the inclined surface, so that the first gear 63 completely moves into the first gear cavity 61, the backrest 16 can be folded in a turnover way, the U-shaped guardrail 17 and the third connecting rod 60 are simultaneously folded when the backrest 16 is folded, the space is saved, when the angle of the backrest 16 needs to be adjusted in the same way, the pressing block 68 is lifted upwards, the first gear 63 is separated from the second gear cavity 62, after the angle is adjusted, the pressing block 68 is released, the first gear 63 moves into the first gear cavity 61 and the second gear cavity 62 through the sixth spring 64, which acts to lock the angle of the backrest 16.

The utility model discloses well link gear 6's second embodiment: the folding chair comprises a fifth connecting rod hinged between the middle part of a U-shaped guardrail 17 and the front end of a seat cushion 11, a third gear cavity and a fourth gear cavity are respectively arranged at the hinged parts of the seat cushion 11 and a backrest 16, a second gear is movably arranged in the third gear cavity, a seventh spring is arranged between the second gear and the third gear cavity, a button capable of enabling the second gear to move towards the direction of the seventh spring is movably arranged at the hinged part of the backrest 16, the second gear is simultaneously arranged in the third gear cavity and the fourth gear cavity under the action of the seventh spring, when the folding chair needs to be folded, the buttons at two sides are simultaneously pressed to enable the second gear to completely move into the third gear cavity, so that the backrest 16 can be turned over and folded, the U-shaped guardrail 17 and the fifth connecting rod are simultaneously folded when the backrest 16 is folded, the space saving effect is achieved, and when the angle of the backrest 16 needs to be adjusted, and the keys on the two sides are simultaneously pressed to enable the second gear to completely move into the third gear-shaped cavity so as to adjust the angle of the backrest 16, the keys are loosened, and the third gear moves into the third gear-shaped cavity and the fourth gear-shaped cavity through the seventh spring to play a role in locking the angle of the backrest 16.

Be equipped with between moving member 13 and the back wheel carrier group 10 and prevent that back wheel carrier group 10 from overturning open screens mechanism 7 in fold condition, screens mechanism 7 is including setting up the lug 70 that is located back wheel carrier group 10 and the articulated department of moving member 13 on moving member 13, be equipped with elasticity fastener 71 on the corresponding position of back wheel carrier group 10 and lug 70, lug 70 is prepared mutually with elasticity fastener 71, and after folding, lug 70 and elasticity fastener 71 cooperation joint play and prevent that the perambulator from carrying and drawing the process automatic expansion behind fold condition, only need exert ascending power to removing pipe fitting 15 simultaneously, just can expand the perambulator, played convenient to use's effect.

The utility model discloses preceding wheel carrier group 1 includes preceding wheel carrier 90 and sets up the front wheel 91 on preceding wheel carrier 90, direction pipe fitting 12 is fixed to be set up on preceding wheel carrier 90, back wheel carrier group 10 includes back wheel carrier 92 and sets up the rear wheel 93 on back wheel carrier 92, moving member 13 is articulated mutually with back wheel carrier 92 upper end detachably installs awning 80 on the third direction casing 67, installs awning 80 through being equipped with detachably and plays outdoor sun-proof effect.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, and it should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only illustrative of the principles of the present invention, and the present invention can be modified in various ways without departing from the spirit and scope of the present invention, and these modifications and changes fall into the scope of the present invention as 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 front wheel carrier group, back wheel carrier group and cushion, its characterized in that: the movable folding mechanism is characterized in that 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 to the guide pipe fitting, a moving member is movably sleeved between the cushion and the front wheel frame group on the guide pipe fitting, the moving member is hinged to 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 by moving the moving member is arranged on the moving member, a fixing mechanism capable of fixing the position of the moving member is arranged on the guide pipe fitting, a pipe sleeve is fixedly arranged on the moving member, and an unlocking fixing mechanism and a movable pipe fitting which drives the folding mechanism are.

2. A pushchair according to claim 1, wherein: the folding mechanism comprises a first connecting rod hinged between the front end of the bottom surface of the cushion and the moving piece, and a second connecting rod is hinged between the upper end of the guide pipe fitting and the middle of the rear wheel carrier group.

3. A pushchair according to claim 2, wherein: the fixing mechanism comprises a first guide shell body which is arranged on the inner wall of the guide pipe fitting and is close to the upper end, a first clamping pin is movably arranged in the first guide shell body, the first clamping pin moves along the length direction of the guide pipe fitting perpendicular to the length direction, 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 oblique guide surface is symmetrically arranged at the outer end of the first clamping pin, and a first oblique jacking block which can enable the first clamping pin to move towards the direction of the first spring is arranged at the position, corresponding to the first oblique guide surface, of the lower end of the movable pipe.

4. A pushchair according to claim 2, wherein: the fixing mechanism comprises a guide cavity arranged in the moving piece, a second bayonet lock is movably arranged in the guide cavity and moves along the length direction vertical to the guide pipe piece, the outer end of the second bayonet lock is symmetrically provided with a second inclined guide surface, 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 position of the guide pipe fitting corresponding to the second clamping pin is fixedly provided with a limiting plate, the limiting plate is provided with a second clamping groove corresponding to the second clamping pin, the second bayonet lock is matched with the second bayonet lock groove, the position of the pipe sleeve corresponding to the second bayonet lock is provided with a yielding groove, and a second inclined ejector block which can enable the second clamping pin to move towards the direction of the second spring is arranged at the position, corresponding to the second inclined guide surface, of the lower end of the movable pipe fitting.

5. A pushchair according to any of claims 3 or 4, wherein: the pipe sleeve is provided with a second lock mechanism which can fix the position of the movable pipe fitting and has a function of preventing mistaken touch and unlocking, the second lock mechanism comprises a plurality of third clamping 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 body close to the lower end, third clamping pins are transversely movably arranged on the second guide shell body, a first inclined guide block with an upward inclined surface is vertically movably arranged on the second guide shell body, a third spring is arranged between the upper end of the first inclined guide block and the second guide shell body, a second inclined guide block is arranged at the position of the third clamping pins corresponding to the first inclined guide block, the inclined surface of the first inclined guide block is matched with the inclined surface of the second inclined guide block, the position of the movable pipe fitting close to the upper end is provided with a handle fixing piece, a pressing plate is hinged on the handle fixing piece, and a fourth spring is arranged between the inner side of the pressing plate, the handle fixing piece is provided with a first inclined guide block, the handle fixing piece is provided with a second inclined guide block, the pressing plate is hinged to the handle fixing piece, the first inclined guide block is arranged on the pressing plate, the second inclined guide block is hinged to the pressing plate, the handle fixing piece is vertically provided with a pushing piece, a limiting block for limiting the pressing plate to turn towards the direction of a fourth spring is fixedly arranged on the inner side of the pushing piece, and a fifth spring is.

6. A pushchair according to claim 5, wherein: the driving assembly comprises a swing rod arranged at the hinged position of the pressing plate, and a first pull rope is arranged between the swing rod and the first inclined guide block.

7. A pushchair according to claim 6, 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 in multiple angles and can quickly fold the backrest and the U-shaped guardrails.

8. A pushchair according to claim 7, wherein: 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 and the first gear shape chamber lie in the horizontal activity in the first gear outside in the back and be equipped with the third oblique guide block that the inclined plane is downward lieing in the vertical activity in the third oblique guide block outside in the back and be equipped with the fourth oblique guide block, the inclined plane of third oblique guide block is prepared mutually with the inclined plane of fourth oblique guide block the back is equipped with the third direction casing vertical activity is equipped with the pressing block on the third direction casing, pressing block both ends are connected with the second stay cord respectively between the fourth oblique guide block of both sides.

9. A pushchair according to claim 8, wherein: the clamping mechanism is arranged between the moving member and the rear wheel carrier group and used for preventing the rear wheel carrier group from turning and opening in a folded state, the clamping mechanism comprises a lug arranged on the moving member and located at the hinged position of the rear wheel carrier group and the moving member, an elastic clamping piece is arranged on the position, corresponding to the lug, of the rear wheel carrier group, and the lug and the elastic clamping piece are arranged mutually.

10. A pushchair according to claim 9, wherein: the front wheel frame assembly 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 assembly comprises a rear wheel frame and rear wheels arranged on the rear wheel frame, the moving member is hinged to the upper end of the rear wheel frame, and the third guide shell is detachably provided with a sunshade.