CN107719562B

CN107719562B - Foldable mother-child vehicle

Info

Publication number: CN107719562B
Application number: CN201711074227.0A
Authority: CN
Inventors: 陈华
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-05
Filing date: 2017-11-05
Publication date: 2023-04-18
Anticipated expiration: 2037-11-05
Also published as: CN107719562A

Abstract

The invention provides a foldable mother-child bicycle which comprises a baby bearing part, a riding part and a handheld frame, wherein the baby bearing part is connected with the riding part through the handheld frame; the handheld frame comprises two handlebars, the lower parts of the two handlebars are respectively connected with an intermediate wheel, the baby bearing part comprises an adjustable baby basket, a front wheel and a front wheel folding mechanism arranged between the handlebars, and the front wheel folding mechanism is used for contracting the front wheel of the baby bearing part and locking the folded front wheel; the primary and secondary bicycle can be independently folded up by the front wheel to be used as a bicycle; the rear carriage is folded, is used as a baby carriage or is folded integrally, is convenient to carry and store, and can be folded quickly; the baby can sit or sleep in the baby basket, the operation is convenient and fast, and the applicability is improved; baby bearing portion has set up the front wheel, increases stability during the use to when contracting, compact structure, when outdoor activities, the usage that the baby basket need not dismantle and can alternate mother and son car, the simple operation.

Description

Foldable mother-child vehicle

Technical Field

The invention relates to the field of baby carriages, in particular to a foldable primary and secondary carriage.

Background

In the prior art, a baby carriage can only be pushed generally, and for adults, when the adults want to go to shopping or some outdoor activities, a common baby carriage is inconvenient to carry, can only be pushed and is arduous, and a mother-child carriage is generated by corresponding green travel at present, namely a bicycle and a baby carriage are combined together, so that the baby carriage is convenient to carry and suitable for adults to ride and is convenient; then, the parent-child vehicle in the prior art still has the following problems: 1. the existing parent-child vehicles are generally as the following as patent publication numbers: the invention discloses a mother and child bicycle convenient to steer, which is CN 203094340U, and is characterized in that a structure for bearing a baby is arranged at the position of a basket of the bicycle, and the mode causes the center of the head part of the bicycle to be unstable, is more laborious to ride and is more troublesome to change; 2. the existing primary and secondary bicycles can not be folded or can be folded only by a common bicycle, or the baby basket can be folded only after being detached, and the folded baby basket has larger volume and is not easy to carry and store; 3. the existing primary and secondary bicycles have single function, cannot be used as a baby carriage or a bicycle independently, and have small application range; 4. the existing baby basket is small, can only be seated but can not sleep, and the position of the baby basket is not adjustable, so that the comfort level of a baby is reduced.

Disclosure of Invention

In order to solve the technical problem, the invention provides a foldable mother-child bicycle which comprises a baby bearing part, a riding part and a handheld frame, wherein the baby bearing part is connected with the riding part through the handheld frame;

the hand-held frame comprises two handlebars, the lower parts of the two handlebars are respectively connected with an intermediate wheel,

the baby bearing part comprises an adjustable baby basket, a front wheel and a front wheel folding mechanism arranged between the handlebars, wherein the front wheel folding mechanism is used for contracting the front wheel of the baby bearing part and locking the folded front wheel;

the bicycle comprises a bicycle folding locking mechanism, a rear folding main shaft and a rear frame, wherein the bicycle folding locking mechanism, the rear folding main shaft and the rear frame are connected between handlebars, the rear frame is connected with the rear folding main shaft, a folding turnover mechanism, a telescopic cushion, a rear wheel and a folding pedal portion are arranged on the rear frame, and the folding pedal portion and the rear wheel are in chain transmission.

Preferably, the front wheel folding mechanism comprises a front wheel frame, a first locking frame and a second locking frame, wherein the first locking frame and the second locking frame are connected between the two handles; the second locking frame is positioned at the upper part and comprises an arc-shaped clamping position and a locking handle, and the locking handle is connected with the first locking piece through a brake cable and is used for controlling the first locking piece to open and close; one side of the arc-shaped clamping position pointing to the baby basket is provided with a front wheel lock tongue, and an automatic bolt mechanism is arranged on the front wheel lock tongue.

Preferably, the front wheel frame is provided with a set of lower and upper locking holes.

Preferably, the first locking piece comprises two locking piece sleeves sleeved on the first locking frame, a plug pin part is arranged on each locking piece sleeve, and an automatic plug pin mechanism is arranged in each plug pin part.

Preferably, a second locking piece is arranged on the arc-shaped position of the second locking frame, and comprises a sliding chute which is connected to the opening of the arc-shaped position through an automatic bolt mechanism; the sliding groove is provided with a sliding shell, the shell is arranged at the half position of the opening, a limiting cavity is arranged in the shell, a sliding tongue is arranged in the limiting cavity, a wedge surface is arranged on the sliding tongue, and an automatic bolt mechanism is connected to the sliding tongue and used for pushing the sliding tongue to extend out of the shell and extend to the opening.

Preferably, the bicycle folding locking mechanism comprises a clamping block sleeved on the first locking frame, the rear folding main shaft is fixed on the clamping block, and two sides of the clamping block are provided with limiting mechanisms; and an automatic bolt mechanism is arranged on the rear folding main shaft and used for locking on the front wheel lock tongue.

Preferably, stop gear is including location latch fitting body, location latch fitting plug-in components, pass the positioning lock pole of location latch fitting body, positioning lock pole tip is equipped with the lockhole, be connected with locking hand power portion on the lockhole, be equipped with the sliding tray on the latch fitting body, the sliding tray both ends are equipped with the jack, the jack includes macropore and aperture and constitutes, the jack intussuseption has locking hand power portion, locking hand power portion drives positioning lock pole is in slide in the sliding tray and insert in the location latch fitting plug-in components.

Preferably, folding tilting mechanism include folded piece, hand-held piece and connect in folding support on the folded piece, be equipped with two sets of setting elements on the folded piece, the cover has the spring and passes on the hand-held piece the setting element, be equipped with the interior pole of rotation on the back frame, the cover has three bearing on the interior pole of rotation, and stretch in the folded stand, the pole tip is equipped with the folding locking hole that four crosses were arranged in the rotation, the both ends of hand-held piece can be inserted in relative a set of in the folding locking hole.

Preferably, the adjustable baby basket comprises baby basket bodies, rotating rods are arranged on two sides of each baby basket body, and one end of each rotating rod is connected with a baby basket locking mechanism; the baby basket locking mechanism comprises a positioning block connected to the rotating rod, a rotating block is sleeved outside the positioning block, and a first clamping tooth is arranged on the inner wall of the rotating block; the side wall of the positioning block is connected with a connecting rod for mounting a baby basket, and a plurality of bayonets are arranged on the inner wall of the positioning block; a sliding column penetrates through the positioning block and comprises a pressing section and a positioning section, the pressing section extends out of the positioning block, a flat key is arranged on the side wall of the pressing section, a second latch matched with the first latch is arranged on the positioning section, a first spring is arranged at the rear part of the positioning section, and the first spring is fixed at the end part of the positioning block through a pressing ring; the end part of the pressing section is provided with a long hole, a sliding block is clamped in the long hole, and the sliding block is clamped in a clamping groove in the inner wall of the positioning block in a sliding mode.

Preferably, automatic bolt mechanism includes the locking piece head, overlaps the overhead second spring of locking piece, the second spring passes through set screw and connects in the overhead of locking piece.

The foldable mother-child vehicle provided by the invention has the following beneficial effects: 1. the front wheel can be folded independently and used as a bicycle; the rear carriage is folded, is used as a baby carriage or is folded integrally, is convenient to carry and store, and can be folded quickly; 2. the baby basket is detachable, the angle position of the baby basket can be adjusted by one hand, a baby can sit or sleep in the baby basket, the operation is convenient and fast, and the applicability is improved; 3. baby bearing portion has set up the front wheel, increases stability during the use to during the shrink, compact structure, 4, when outdoor activities, the usage (push away or ride) that the baby basket need not dismantle and can alternate mother and son car, the simple operation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

FIG. 1 is a side schematic view of the present invention in normal use;

FIG. 2 is a perspective view of the present invention in normal use;

FIG. 3 is a perspective view of the present invention in normal use;

FIG. 4 is a schematic front wheel stow away view of the present invention;

FIG. 5 is a schematic view of the front wheel retraction of the present invention;

FIG. 6 is a schematic view of the riding portion of the present invention retracted;

FIG. 7 is a schematic drawing of the overall contraction of the present invention;

FIG. 8 is an exploded view of the first locking bracket of the present invention for retracting the front wheel;

FIG. 9 is an exploded view of the second locking bracket of the present invention;

FIG. 10 is an exploded pictorial illustration of the rear folding spindle attachment of the present invention;

FIG. 11 is an exploded view of the folding and flipping mechanism of the present invention;

FIG. 12 is an exploded view of the stroller basket locking mechanism of the present invention;

FIG. 13 is a schematic view of the automatic latching mechanism of the present invention;

wherein, 1, the baby bearing part; 2. a riding part; 3. a hand-held frame; 4. a handlebar; 5. an intermediate wheel; 6. an adjustable baby basket; 7. a front wheel; 8. the main shaft is folded; 9. a rear frame; 10. a front wheel carrier; 11. a folding step part; 12. a telescopic cushion; 13. a second locking frame; 14. a first locking frame; 15. arc-shaped clamping positions; 16. a locking handle; 17. a front wheel latch; 18. an upper locking hole; 19. a lower locking hole; 20. a lock piece sleeve; 21. a housing; 22. a sliding tongue; 23. positioning a locking piece plug-in; 24. a lock positioning rod; 25. locking the hand-pulling part; 26. a sliding groove; 27. a jack; 28. a folding member; 29. a hand pull; 30. a third spring; 31. a folding frame; 32. a positioning member; 33. a bearing; 34. rotating the inner rod; 35. rotating the rod; 36. positioning blocks; 37. rotating the block; 38. a pressing section; 39. a positioning section; 40. a first spring; 41. pressing a ring; 42. a flat bond; 43. a first latch; 44. a slider; 45. a long hole; 46. a card slot; 47. a lock head; 48. a second spring; 49. fixing screws; 50. a clamping block; 51. a positioning lock body; 52. a second latch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1, 2 and 3, the invention provides a foldable mother-child car, which comprises a baby carrying part 1, a riding part 2 and a handheld frame 3, wherein the baby carrying part 1 is connected with the riding part 2 through the handheld frame 3; the handheld frame 3 comprises two handlebars 4, two the 4 lower parts of the handlebars are respectively connected with an intermediate wheel 5, wherein a hand brake is arranged on the handlebars 4, a disc brake is arranged on the intermediate wheel 5, and the disc brake greatly increases the braking performance through the control of the hand brake on the handlebars 4, and has good and stable braking effect.

The invention is divided into 4 states, firstly, as shown in fig. 1, 2 and 3, the baby carrier part 1 and the riding part 2 are in a fully unfolded normal use state;

secondly, the front wheel 7 of the baby carrier 1 is in a contracted state, and as shown in fig. 4 and 5, the front wheel 7 of the baby carrier 1 is in a contracted state, and can be used as a bicycle;

thirdly, in the contracted state of the riding part 2, as shown in fig. 6, the riding part 2 is completely folded at the position of the handheld frame 3 to be used as a single baby carriage;

fourth, accomodate the state, as shown in fig. 7, with baby's carrier portion 1 and the portion 2 of riding contract completely, small, be convenient for accomodate, can prevent in car trunk etc. occupation space is little.

Specifically, the way of achieving the retracted state of the front wheels 7 of the baby carrier 1 is as follows:

the baby bearing part 1 comprises an adjustable baby basket 6, a front wheel 7 and a front wheel 7 contraction mechanism arranged between the handlebars 4, wherein the front wheel 7 contraction mechanism is used for contracting the front wheel 7 of the baby bearing part 1 and locking the contracted front wheel 7; the front wheel 7 contraction mechanism comprises a front wheel frame 10, the two handles are vertical straight rods, the lower part of the front wheel 7 contraction mechanism is connected with an intermediate wheel 5, as shown in fig. 8, the first locking frame 14 is positioned at the lower part between the two handles and is provided with a first locking piece, the first locking piece comprises two locking piece sleeves 20 sleeved on the first locking frame 14, the locking piece sleeves 20 are provided with plug pins, automatic plug pin mechanisms are arranged in the plug pins and are used for fixing the front wheel frame 10 in a normal use state, the front wheel frame 10 is provided with a group of lower locking holes 19 and upper locking holes 18, when the front wheel frame is used, the automatic plug pin mechanisms on the locking piece sleeves are plugged in the upper locking holes 18 of the front wheel frame 10 during normal use, the stability of the front wheel frame 10 during normal riding can be limited, when the front wheel frame is required to be contracted, the locking handle 16 on the second locking frame 13 is held, a brake cable is driven to enable the automatic plug pin mechanisms to be pulled out from the upper locking holes, and the front wheel frame 10 can be pulled towards the second locking frame 13;

the structure of the automatic latch mechanism referred to above and below is: the lock head 47, the second spring 48 of cover on the lock head 47, second spring 48 passes through the fixed screw 49 and connects on the lock head 47, and the lock head 47 can be through promoting, compresses second spring 48, and second spring 48 is through acting force propelling lock head 47.

As shown in fig. 9, the second locking frame 13 is located at the upper portion, and is used for fixing the front wheel frame 10 when the front wheel 7 of the baby carrying portion 1 is retracted, and includes an arc-shaped detent 15 and a locking handle 16, where a detent mechanism is provided on the locking handle 16, and is used for pulling out the locking piece head 47 of the automatic latch mechanism in the locking piece sleeve 20 through a brake cable when the locking handle 16 is pressed, and when the locking handle 16 is pressed again, the brake cable is released by a hand, so that the locking piece head 47 is in a normally open state, and when the locking handle 16 is pressed again, the locking piece head 47 is released, and the front wheel frame 10 is pulled to the arc-shaped detent 15, and one side of the arc-shaped detent, which points to the baby basket, is provided with a front wheel latch 17, and then the front wheel frame is rotated 90 °, so that the front wheel 7 is horizontally located between the two intermediate wheels 5, and after the rotation, is close to the front wheel latch 17, the front wheel latch mechanism is provided on the front wheel latch, and when the front wheel latch is pulled, the front wheel frame 10 is fixed with an upper detent Kong Chage to realize the positioning.

The following explains a contraction mode of the riding portion 2, and the structure thereof is: as shown in fig. 10, including connecting bicycle folding locking mechanical system, the back folding main shaft 8 between handlebar 4, with the back frame 9 that back folding main shaft 8 is connected, be equipped with folding tilting mechanism, flexible cushion 12, rear wheel, folding pedal portion 11 on the back frame 9, folding pedal portion 11 with the rear wheel passes through chain drive, and the structure at back folding main shaft 8 rear portion chooses foldable bicycle's structure for use, and folding pedal portion 11 is collapsible, and the cushion is scalable, and its design point lies in that back folding main shaft 8 is collapsible and rotates, specific saying so:

as shown in fig. 10, the folding locking mechanism of the bicycle comprises a clamping block 50 sleeved on the first locking frame 14, the rear folding main shaft 8 is fixed on the clamping block 50, the clamping block 50 is sleeved on the first locking frame 14, the rear folding main shaft 8 can rotate up and down on the first locking frame 14 through the clamping block 50, an automatic latch mechanism is arranged on the rear folding main shaft 8, a front wheel latch 17 is arranged on one side of the arc-shaped clamping position 15 facing the baby basket, when the front wheel frame is contracted and pulled upwards, the front wheel frame is positioned in the arc-shaped clamping position, when the rear folding main shaft 8 is folded, the rear folding main shaft is positioned in the arc-shaped clamping position 15, specifically,

a second locking piece is arranged on the arc-shaped clamping position 15 of the second locking frame 13, and comprises a sliding chute which is connected to the opening of the arc-shaped clamping position 15 through an automatic bolt mechanism; be equipped with slip shell 21 on the spout, shell 21 locates half open-ended position, be equipped with spacing chamber in the shell 21, spacing intracavity is equipped with tongue 22, be equipped with the wedge face on the tongue 22, connect automatic bolt mechanism on the tongue 22, be used for promoting tongue 22 stretches out shell 21, and stretch in the opening part, when preceding wheel carrier 10 upper portion stimulates to arc screens 15 in, promotes slider 44, slider 44 because automatic bolt mechanism's effect shrink, its structure is similar with traditional lock structure, folds main shaft 8 and turns over upward when the back, presses slider 44, gets into arc screens 15 interior back completely, and slider 44 is closed with the opening, fixes a position back folding main shaft 8.

As shown in fig. 11, the folding and turning mechanism includes a folding member 28, a hand-pulling member 29 and a folding support connected to the folding member 28, the folding member 28 at this position is a body folding member 28 of a traditional folding bicycle, two sets of positioning members 32 are arranged on the folding member 28, a spring is sleeved on the hand-pulling member 29 and penetrates through the positioning members 32, an inner rotating rod 34 is arranged on the rear frame 9, three bearings 33 are sleeved on the inner rotating rod 34 and extend into the folding support 31, the end of the inner rotating rod 34 is provided with four folding locking holes arranged in a cross shape, two ends of the hand-pulling member 29 can be inserted into one set of the folding locking holes, the hand-pulling member 29 is of a similar C-shaped structure, the inner rod is provided with the bearings 33 in sequence according to size, so as to ensure that the rotation is more stable, the hand-pulling member 29 is inserted into the folding locking holes in a normal state, the hand-pulling member 29 is pulled, after the hand-pulling frame is 90 degrees, the hand-pulling member 29 is loosened, due to the spring effect, the hand-pulling member 29 is inserted into another set locking holes in another set, the folding support 9 is positioned, and then, the folding support is folded in a folding state of a bicycle 7, such as a folding bicycle, and a folding main shaft of a bicycle is realized by a folding bicycle as a folding state of fig. 2.

It should be noted that, in order to ensure the stability between the rear folding main shaft 8 and the first locking frame 14 in the riding state, two sides of the clamping block 50 are provided with a limiting mechanism; stop gear is including location latch fitting body 51, location latch fitting plug-in components 23, pass location latch fitting body 51's positioning lock pole 24, positioning lock pole 24 tip is equipped with the lockhole, be connected with locking hand power portion 25 on the lockhole, be equipped with sliding tray 26 on the latch fitting body, sliding tray 26 both ends are equipped with jack 27, jack 27 includes macropore and aperture and constitutes, jack 27 interpolation has locking hand power portion 25, locking hand power portion 25 drives positioning lock pole 24 is in slide tray 26 slides and insert in the location latch fitting plug-in components 23, its working method is: during the state of riding, the positioning lock bar 24 passes through the positioning lock piece body 51 and passes through the upper part of the clamping block 50 and the through hole corresponding to the positioning lock piece body 51, the rear folding spindle 8 can be prevented from shaking, when the rear folding spindle 8 needs to be rotated, the locking hand-pulling part 25 is pulled, the small hole is pulled out and then slides along the sliding groove 26, the clamping block 50 and the positioning lock piece plug-in unit 23 are driven to be inserted, the locking hand-pulling part 25 is released, and the spring acts to insert the clamping block into the large hole, so that the fixing is realized.

During the whole shrink, go on simultaneously for foretell two modes for, in order to facilitate accomodating, adjustable baby basket 6 can angle regulation, perhaps dismantles, separately deposits, and then further reduces the shrink space. In particular, the present invention relates to a method for producing,

the adjustable baby basket 6 comprises a baby basket body, wherein rotating rods 35 are arranged on two sides of the baby basket body, one end of each rotating rod 35 is connected with a baby basket locking mechanism, and each rotating rod 35 can rotate along the lower portion of the handheld frame 3;

the baby basket locking mechanism can adjust the rotation angle of the baby basket and can be operated by a single person, and particularly, as shown in fig. 1 and 12, the baby basket locking mechanism comprises a positioning block 36 connected to the rotation rod 35, a rotation block 37 is sleeved outside the positioning block 36, and a first latch 43 is arranged on the inner wall of the rotation block 37; the side wall of the positioning block 36 is connected with a connecting rod for mounting a baby basket, and a plurality of bayonets are arranged on the inner wall of the positioning block 36; a sliding column penetrates through the positioning block 36 and comprises a pressing section 38 and a positioning section 39, the pressing section 38 extends out of the positioning block 36, a flat key 42 is arranged on the side wall of the positioning block, a second latch 52 matched with the first latch 43 is arranged on the positioning section 39, a first spring 40 is arranged at the rear part of the positioning section 39, and the first spring 40 is fixed at the end part of the positioning block 36 through a pressing ring 41; the end of the pressing section 38 is provided with a long hole 45, a sliding block 44 is clamped in the long hole 45, the sliding block 44 is slidingly clamped in a clamping groove 46 on the inner wall of the positioning block 36, and the working mode is as follows: during normal state, flat key 42 guarantees to press section 38 and axis of rotation inner wall block, presses and presses the section, flat key 42 separation in the locating piece, first spring 40 compresses, at this moment, slide block 44, slider 44 blocks back in the draw-in groove 46 of locating piece 36 inner wall, the connecting rod of connecting the baby basket is rotatable, and there are first latch 43 and the contact of second latch 52, can realize the rotation of graduation during the rotation, guarantee pivoted stability, after angular adjustment finishes, roll-off slider 44, the effect of spring makes the sliding column return, whole process alone can operate the completion.

Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The foldable mother-child bicycle is characterized by comprising a baby bearing part, a riding part and a handheld frame, wherein the baby bearing part is connected with the riding part through the handheld frame;

the hand-held rack comprises two handlebars, the lower parts of the two handlebars are respectively connected with a middle wheel,

the baby bearing part comprises an adjustable baby basket, a front wheel and a front wheel folding mechanism arranged between the handlebars, wherein the front wheel folding mechanism is used for contracting the front wheel of the baby bearing part and locking the folded front wheel; the bicycle comprises a bicycle folding locking mechanism, a rear folding main shaft and a rear frame, wherein the bicycle folding locking mechanism is connected between handlebars, the rear frame is connected with the rear folding main shaft, a folding turnover mechanism, a telescopic cushion, a rear wheel and a folding pedal part are arranged on the rear frame, and the folding pedal part and the rear wheel are in chain transmission;

the front wheel folding mechanism comprises a front wheel frame, a first locking frame and a second locking frame, wherein the first locking frame and the second locking frame are connected between the two handles; the second locking frame is positioned at the upper part and comprises an arc-shaped clamping position and a locking handle, and the locking handle is connected with the first locking piece through a brake cable and is used for controlling the first locking piece to open and close; one side of the arc-shaped clamping position facing the baby basket is provided with a front wheel lock tongue, and an automatic bolt mechanism is arranged on the front wheel lock tongue.

2. The foldable mother-child cart according to claim 1, wherein the front wheel frame is provided with a set of lower and upper locking holes.

3. The foldable mother-child vehicle as claimed in claim 2, wherein the first locking member comprises two locking member sleeves sleeved on the first locking frame, and a plug pin portion is arranged on each locking member sleeve and is internally provided with an automatic plug pin mechanism.

4. The foldable mother-child cart according to claim 2, wherein a second locking member is provided on the arc-shaped position of the second locking frame, the second locking member comprising a sliding slot connected to an opening of the arc-shaped position through an automatic latch mechanism; the sliding groove is provided with a sliding shell, the shell is arranged at the half position of the opening, a limiting cavity is arranged in the shell, a sliding tongue is arranged in the limiting cavity, a wedge surface is arranged on the sliding tongue, and an automatic bolt mechanism is connected to the sliding tongue and used for pushing the sliding tongue to extend out of the shell and extend to the opening.

5. The foldable mother-child bicycle according to claim 1, wherein the bicycle folding locking mechanism comprises a clamping block sleeved on the first locking frame, the rear folding main shaft is fixed on the clamping block, and two sides of the clamping block are provided with limiting mechanisms; and an automatic bolt mechanism is arranged on the rear folding main shaft and used for locking on the front wheel lock tongue.

6. The foldable parent-subsidiary vehicle according to claim 5, wherein the limiting mechanism comprises a positioning lock piece body, a positioning lock piece plug-in unit and a positioning lock rod penetrating through the positioning lock piece body, a lock hole is arranged at the end part of the positioning lock rod, a locking hand-pulling part is connected to the lock hole, a sliding groove is arranged on the lock piece body, jacks are arranged at two ends of the sliding groove and comprise large holes and small holes, the locking hand-pulling part is inserted into the jacks, and the locking hand-pulling part drives the positioning lock rod to slide in the sliding groove and be inserted into the positioning lock piece plug-in unit.

7. The foldable mother-child cart according to claim 1, wherein the foldable turnover mechanism comprises a foldable member, a hand-pulling member and a foldable support connected to the foldable member, two sets of positioning members are disposed on the foldable member, a third spring is sleeved on the hand-pulling member and penetrates through the positioning members, an inner rotating rod is disposed on the rear frame, three bearings are sleeved on the inner rotating rod and extends into the foldable support, four foldable locking holes arranged in a cross shape are disposed at the end of the inner rotating rod, and two ends of the hand-pulling member can be inserted into one set of the foldable locking holes.

8. The foldable mother-child cart according to claim 1, wherein the adjustable baby basket comprises a baby basket body, rotating rods are arranged on two sides of the baby basket body, and a baby basket locking mechanism is connected to one end of each rotating rod; the baby basket locking mechanism comprises a positioning block connected to the rotating rod, a rotating block is sleeved outside the positioning block, and a first clamping tooth is arranged on the inner wall of the rotating block; the side wall of the positioning block is connected with a connecting rod for mounting a baby basket, and a plurality of bayonets are arranged on the inner wall of the positioning block; a sliding column penetrates through the positioning block and comprises a pressing section and a positioning section, the pressing section extends out of the positioning block, a flat key is arranged on the side wall of the pressing section, a second latch matched with the first latch is arranged on the positioning section, a first spring is arranged at the rear part of the positioning section, and the first spring is fixed at the end part of the positioning block through a pressing ring; the end part of the pressing section is provided with a long hole, a sliding block is clamped in the long hole, and the sliding block is clamped in a clamping groove in the inner wall of the positioning block in a sliding mode.

9. The foldable mother-child vehicle as claimed in claim 1, 3, 4 or 5, wherein the automatic latch mechanism comprises a locking piece head, and a second spring sleeved on the locking piece head, and the second spring is connected to the locking piece head through a fixing screw.