CN211032712U

CN211032712U - Baby carriage frame

Info

Publication number: CN211032712U
Application number: CN201921761395.1U
Authority: CN
Inventors: 杨钧卿
Original assignee: Qingyuan Trade Agent Service Department West District Zhongshan City
Current assignee: Qingyuan Trade Agent Service Department West District Zhongshan City
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-07-17
Anticipated expiration: 2029-10-18

Abstract

The utility model discloses a baby carriage frame, the lower end of a push rod is connected with the upper end of a front foot bar through a joint, a handle bar is connected with the push rod, a rear foot bar is connected with a sliding part, a front linkage rod is hinged between the sliding part and the front foot bar, a rear linkage rod is hinged between the sliding part and the rear foot bar, a first locking control component is arranged on the handle bar and the push rod, a second locking control component is arranged between the rear foot bar and the sliding part, when the baby carriage frame is folded, the first locking control component is acted firstly to enable the handle bar to retract relative to the push rod, and when the lower end of the handle bar is pressed to trigger the joint, the joint is unlocked, at the moment, a user then lifts the second locking control component upwards, the sliding part is unlocked, under the action of gravity and the front linkage rod and the rear linkage rod, the front foot bar and the push rod are completely attached to the rear foot bar, after the folding is completed, the user can operate by a single hand, the unlocking of the frame is safe and orderly, and the problem of clamping injury caused by misoperation is avoided.

Description

Baby carriage frame

[ technical field ] A method for producing a semiconductor device

The utility model relates to the field of children's vehicles, in particular to a baby carriage frame.

[ background of the invention ]

The existing infant car frame is convenient for parents to fold when taking an infant to go out, and generally has a folding structure, and the folding mechanism has various design structures, so that the locking mechanism of the ordinary foldable infant car is complex in arrangement, complicated in unlocking and folding steps and unreliable in locking potential safety hazards.

In addition, when the frame of a common baby carriage is unfolded for use, the distance between the two front wheels is smaller than that between the two rear wheels, and the distance between the two front wheels and the distance between the two rear wheels are not changed before and after the folding, so that after the frame of the whole carriage is folded, the two rear wheels are arranged on the outer sides of the two front wheels, and the folded frame still occupies a large space, so that the baby carriage is inconvenient to carry.

Furthermore, the foldable infant stroller frame requires two hands to cooperate when being folded, and when a user holds a child with one hand, one person cannot fold the stroller frame, which is inconvenient for some users.

The utility model discloses the not enough research of prior art is proposed promptly.

[ Utility model ] content

The utility model aims to solve the technical problem of providing an infant car frame, which comprises a front foot bar, a rear foot bar, a push rod and a handle bar, wherein the lower end of the push rod is connected with the upper end of the front foot bar through a joint, the handle bar is telescopically connected with the push rod, a sliding part is slidably connected with the rear foot bar, a rear linkage bar is hinged between the sliding part and the rear foot bar, a first locking control component for controlling the handle bar to stretch relative to the push rod is arranged on the handle bar and the push rod, a second locking control component is arranged between the rear foot bar and the sliding part, when the infant car frame is folded, the first locking control component is firstly acted to ensure that the handle bar retracts relative to the push rod, and when the lower end of the handle bar is pressed to trigger the joint, the joint is unlocked, at the moment, a user then lifts the second locking control component upwards, the sliding part is unlocked, under the action of gravity, the push rod is folded downwards and drawn, the slider slides towards the lower extreme of back foot bar to drag preceding gangbar and back gangbar, make preceding foot bar and push rod be close to in the back foot bar completely, finally accomplish the back of folding up, whole frame is the state of erectting, and the user can be operated by single one hand, has adopted joint, first locking control subassembly and the three locking and unlocking structure of second locking control subassembly, makes frame unblock safe and go on in order, avoids the maloperation to lead to pressing from both sides the problem of hindering.

In order to solve the technical problem, the utility model relates to an infant's car frame, include:

the lower end of the front foot rod is provided with a front wheel component.

The rear foot bar, rear wheel subassembly is equipped with to rear foot bar lower extreme.

The lower end of the push rod and the upper end of the front foot rod are provided with a joint capable of rotating relatively.

The sliding part is connected to the back foot rod and can slide relative to the back foot rod.

The lower end of the rear linkage rod is connected with the sliding piece through a universal hinge structure, the upper end of the rear linkage rod is directly or indirectly connected with the push rod through the universal hinge structure, or the upper end of the rear linkage rod is directly or indirectly connected with the push rod through at least two levels of rotatable hinge structures.

The upper portion of the push rod is connected with a handle rod in a telescopic mode, and a first locking control assembly used for controlling the handle rod to stretch relative to the push rod and to act on the joint to unlock after the handle rod stretches is arranged between the handle rod and the push rod.

And a second locking control component used for locking the sliding part on the rear foot rod when the frame is unfolded is arranged between the rear foot rod and the sliding part.

According to the infant car frame, the sliding piece is hinged with the front linkage rod, and the front end of the front linkage rod is directly or indirectly hinged with the front foot rod.

According to the infant car frame, the first cross rod is arranged between the two front foot rods, and the front linkage rod is indirectly hinged with the front foot rod through the first cross rod.

According to the infant carrier, the second cross rod is arranged between the two joints, and the upper end of the rear foot rod is hinged with the second cross rod or the seat plate.

According to the infant car frame, the second cross rod is provided with the hinge seat, the hinge seat is provided with the hinge shaft hole, and the upper end of the rear foot rod is rotatably connected to the corresponding hinge shaft hole.

In the baby carriage frame, the included angle between the axes of the two hinge shaft holes 202 is α, 180 degrees is more than α and more than 90 degrees, and the included angle between the axis of the hinge shaft hole 202 and the axis of the second cross bar 200 is β and less than 90 degrees.

According to the infant carrier, the first locking control assembly comprises a handle switch assembly arranged on the handle rod and a handle rod locking assembly arranged between the end of the handle rod and the push rod, and a linkage piece is arranged between the handle switch assembly and the handle rod locking assembly.

According to the infant carrier, the handle switch assembly comprises a handle rotatably arranged on the handle rod and a driving block axially slidably arranged in the handle rod, a driving inclined groove is formed in the driving block, a clamping pin extending into the driving inclined groove to act the driving block to slide along the handle rod is arranged on the inner side of the handle, and the driving block is connected with a linkage piece.

Handle bar locking Assembly includes the slider, triggers piece, spring bolt and elasticity and resets, slider slidable ground sets up on triggering the piece, elasticity resets and contradicts respectively in slider and trigger piece both ends, linkage lower extreme is connected with the slider, be provided with the direction chute on the slider, be equipped with the flexible control tank along the radial setting of handle bar on triggering the piece, the spring bolt runs through in direction chute and flexible control tank through the round pin axle and connects on triggering the piece, handle bar locking Assembly still including set up on the push rod be used for with spring bolt complex lockhole, when linkage pulling slider, the spring bolt free end then withdraws from the lockhole for handle bar telescopic sliding of relative push rod.

According to the infant carrier, the joint comprises an upper joint block connected with the lower end of the push rod and a lower joint block connected with the upper end of the front foot rod, a locking clamping groove is formed between the upper joint block and the lower joint block, the joint further comprises a joint locking clamping block and a joint locking reset piece, the joint locking clamping block is movably embedded in the locking clamping groove, the joint locking reset piece is arranged between the joint locking clamping block and the upper joint block or the lower joint block, correspondingly, a joint unlocking guide inclined plane is arranged on one side face, away from the joint locking reset piece, of the joint locking clamping block, when the lower end of the handle rod directly or indirectly abuts against the joint unlocking guide inclined plane, the joint locking clamping block can be separated from the locking clamping groove in the upper joint block or the lower joint block, and the lower joint block can rotate relative to the upper joint block.

According to the infant car frame, the joint further comprises the wedge-shaped block, the wedge-shaped block is provided with the wedge-shaped surface matched with the joint unlocking guide inclined surface, when the lower end of the handle rod abuts against the upper end of the wedge-shaped block to enable the wedge-shaped surface to extrude the joint unlocking guide inclined surface, the joint locking clamping block can be separated from the locking clamping groove in the upper joint block or the lower joint block, and then the lower joint block can rotate relative to the upper joint block.

According to the infant carrier, the second locking control assembly comprises a clamping hook, a locking hook and a locking hook resetting piece, the clamping hook is arranged on the sliding piece, the middle part of the locking hook is hinged to the upper part of the rear foot rod, the locking hook resetting piece is arranged between one end of the locking hook and the rear foot rod and elastically presses the locking hook to enable the locking hook to be buckled on the clamping hook, and the locking hook is connected with an unlocking pull rope/belt used for pulling the locking hook to enable the locking hook to be separated from the clamping hook.

According to the infant car frame, the universal hinge structure is a spherical hinge structure, the two-stage rotatable hinge structure comprises a first steering joint and a second steering joint, the first steering joint is directly or indirectly pivoted with the push rod, one end of the second steering joint is pivoted on the first steering joint, and the other end of the second steering joint is relatively fixed and connected with the rear linkage rod.

The utility model discloses still provide another kind of baby's car frame, its characterized in that includes:

the lower end of the front foot rod is provided with a front wheel component.

The lower end of the rear linkage rod is connected with the sliding piece through a universal hinge structure, the upper end of the rear linkage rod is directly or indirectly connected with the push rod through the universal hinge structure, or the upper end of the rear linkage rod is directly or indirectly connected with the push rod through at least a second-stage hinge structure.

And a first locking control component for controlling the joint to be unlocked is arranged on the push rod.

Compared with the prior art, the utility model relates to an infant's car frame has following advantage:

1. the first locking control assembly, the joint and the second locking control assembly are respectively arranged between the handle rod and the push rod, between the push rod and the front foot rod and between the sliding piece and the rear foot rod, the whole frame is provided with three locking and unlocking mechanisms, so that the frame is unlocked safely and orderly, the phenomenon that the frame of an infant is folded due to misoperation unlocking under the condition that the infant is arranged on the seat part of the frame is avoided, and the design scheme has the characteristics of safe and reliable use.

2. When folding up, a user can firstly act on the first locking control component with one hand to release the locking state of the handlebar rod, then the lower end of the handlebar rod can trigger the joint to unlock, the push rod turns backwards and downwards under the action of gravity, at the moment, the user lifts the second locking control component again, under the action of gravity and the front linkage rod and the rear linkage rod, the front foot rod and the push rod are drawn close to the rear foot rod, and after being completely folded up, the whole frame is in a vertical state, so that the folding up device has the characteristic of convenience and quickness in folding up.

3. The upper ends of the rear foot rods are connected through the hinged shaft holes of the hinged seats, the hinged shaft holes are arranged oppositely and obliquely with the second cross rod, so that the rear wheel assemblies of the two rear foot rods are positioned at the inner sides of the two front wheel assemblies after being folded, and when the frame is unfolded, the distance between the two rear wheel assemblies is greater than the distance between the two front wheel assemblies.

4. Set up a plurality of lockholes on the push rod, through acting on first locking control assembly, can adjust the flexible length of handle bar to the comfort level that the adjustment user used.

5. The first cross rod is fixedly connected between the two front foot rods, the second cross rod is fixedly connected between the two joints, and the whole frame connection is more reliable and stable through the connection of the first cross rod and the second cross rod.

6. The two ends of the rear linkage rod are connected with the push rod and the sliding part through universal hinge structures, or the upper end of the rear linkage rod is connected with the push rod through at least two-stage rotatable hinge structures, so that the rear foot rod can be smoothly folded inwards in the folding process, and interference is avoided.

[ description of the drawings ]

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a side view of the present invention;

fig. 2 is one of the schematic three-dimensional structures of the present invention;

fig. 3 is a second schematic perspective view of the present invention;

FIG. 4 is an exploded view of the handle bar locking assembly, push rod and handle bar attachment structure of the present invention;

FIG. 5 is an exploded view of the handle bar locking assembly of the present invention;

fig. 6 is an exploded view of the handle switch assembly of the present invention;

FIG. 7 is an exploded view of a middle joint of the present invention;

figure 8 is an enlarged view of the utility model shown in figure 3 at reference a;

fig. 9 is a schematic structural view of the connection between the second cross bar and the hinge seat of the present invention;

FIG. 10 is an exploded view of a second locking control assembly of the present invention;

FIG. 11 is a schematic structural view of the middle and rear linkage rods of the present invention connected to the sliding member and the push rod, respectively;

FIG. 12 is a reference view of the foldable device of the present invention;

fig. 13 is a side view of an embodiment of the present invention in which the front linkage is omitted.

[ detailed description ] embodiments

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 13, the utility model relates to a baby carriage frame, which comprises a front foot bar 1, a rear foot bar 2, a push rod 3, a handle bar 31, a sliding piece 5 and a rear linkage bar 7. The lower end of the front foot rod 1 is provided with a front wheel assembly, and the lower end of the rear foot rod 2 is provided with a rear wheel assembly.

A joint 4 capable of rotating relatively is arranged between the lower end of the push rod 3 and the upper end of the front foot rod 1, when the frame is unfolded, the joint 4 can automatically lock the push rod 2 and the front foot rod 1 relatively, and when the lower end of the handle rod is pressed against the joint 4, the joint 4 is forced to be unlocked, so that the push rod can be turned backwards relative to the front foot rod 1.

The sliding part 5 is connected to the rear foot rod 2 and can slide relative to the rear foot rod 2, a sliding groove 21 is formed in the rear foot rod 2, a guide block arranged in the sliding groove is arranged in the sliding part, and a second locking control component 9 used for locking the sliding part 5 on the rear foot rod 2 when the frame is unfolded is arranged between the rear foot rod 2 and the sliding part 5. When unfolded, the sliding piece is locked on the upper part of the back foot rod 2 through the second locking control component.

The rear linkage rod 7 is connected with the sliding piece 5 through a universal hinge structure, the upper end of the rear linkage rod 7 is directly or indirectly connected with the push rod 3 through the universal hinge structure, or the upper end of the rear linkage rod 7 is directly or indirectly connected with the push rod 3 through at least two-stage rotatable hinge structures. As shown in fig. 11, in the embodiment of the present invention, the universal hinge structure is a spherical hinge structure, the second-level rotatable hinge structure includes a first steering joint 71 and a second steering joint 72, the first steering joint 71 is directly or indirectly pivoted with the push rod 3, one end of the second steering joint 72 is pivoted on the first steering joint 71, and the other end of the second steering joint 72 is relatively fixed and connected with the rear linkage rod 7, so that the rear linkage rod 7 has two rotational degrees of freedom in different directions relative to the push rod 3, and when folding, the lower ends of the two rear foot rods 2 fold inward the two front foot rods 1 without interference, thereby ensuring smooth folding, compact folding, and minimized size.

When the second locking control assembly is acted, the sliding piece is unlocked, the push rod is turned downwards and backwards under the action of gravity, and the sliding piece is acted by the rear linkage rod, so that the sliding piece slides along the rear end of the rear foot rod 2.

The upper portion of the push rod 3 is telescopically connected with a handle rod 31, a first locking control component 8 used for controlling the handle rod 31 to stretch relative to the push rod 3 and controlling the handle rod 31 to be contracted and then to act on the joint 4 for unlocking is arranged between the handle rod 31 and the push rod 3, and the telescopic length of the handle rod 31 relative to the push rod can be adjusted through the first locking control component 8 so as to adapt to the use height and length of a user.

As shown in figures 1-3, in order to facilitate the folding and unfolding of the bicycle frame, a front linkage rod 6 is hinged on the sliding piece 5, and the other end of the front linkage rod 6 is directly or indirectly hinged with the front foot rod 1. When folded, the sliding part slides downwards, and the front foot rod 1 is pulled to approach the rear foot rod 2 through the front linkage rod.

In order to strengthen the connection, a first cross rod 100 is arranged between the two front foot rods 1, the front end of the front linkage rod 6 is hinged on the first cross rod 100, and the hinged point of the front linkage rod 6 and the first cross rod is positioned between the inner sides of the two front foot rods 1.

Similarly, as shown in fig. 9, a second cross bar 200 is disposed between the two joints 4, the upper end of the rear leg bar 2 is hinged to the second cross bar 200 or the seat plate, a hinge seat 201 is disposed on the second cross bar 200, a hinge shaft hole 202 is disposed on the hinge seat 201, and the upper end of the rear leg bar 2 is rotatably connected to the corresponding hinge shaft hole 202. as shown in fig. 9, the included angle between the axes of the two hinge shaft holes 202 is α, 180 ° is greater than α > 90 °, the included angle between the axis of the hinge shaft hole 202 and the axis of the second cross bar 200 is β < 90 °.

As shown in fig. 4 to 6, the first locking control assembly 8 includes a handle switch assembly 81 disposed on the handle bar and a handle bar locking assembly 82 disposed between the end of the handle bar and the push rod, and a linkage 83 is disposed between the handle switch assembly 81 and the handle bar locking assembly 82.

As shown in fig. 6, the handle switch assembly 81 includes a handle 811 rotatably disposed on the handle bar 31 and a driving block 812 axially slidably disposed in the handle bar 31, the driving block 812 is provided with a driving inclined groove 813, the handle 811 is provided with a detent 814 extending into the driving inclined groove 813 to act the driving block 812 to slide along the handle bar 31, and the driving block 812 is connected with the linkage 83. When the device is used, the handle is correspondingly rotated, the bayonet pin acts on the driving inclined groove 813 to drive the driving blocks to slide oppositely, and then the linkage part 83 can be pulled.

As shown in fig. 4, the handle lever locking assembly 82 includes a slider 821, a trigger block 822, a latch 823 and an elastic restoring member 824, the sliding block 821 is slidably disposed on the trigger block 822, two ends of the elastic restoring member 824 respectively abut against the sliding block 821 and the trigger block 822, the lower end of the linkage 83 is connected with a sliding block 821, a guide chute 825 is arranged on the sliding block 821, the trigger block 822 is provided with a telescopic control slot 826 arranged along the radial direction of the handle bar 31, the latch 823 is connected to the trigger block 822 by a pin shaft penetrating through the guide chute 825 and the telescopic control slot 826, the handle bar locking assembly 82 further includes a locking hole 827 disposed on the push rod for engaging the locking bolt 823, according to the requirement, the lock hole 827 can be designed in a plurality, when the link 83 pulls the slide block 821, the free end of the lock tongue 823 exits the lock hole 827, so that the handle rod can telescopically slide relative to the push rod. When the link 83 is pulled, the lower end of the link 83 overcomes the elastic reset piece to pull the slide block 821 to move, and the pin shaft on the lock tongue is matched with the guide inclined groove 825 and the telescopic control groove 826 to enable the lock tongue to retract out of the lock hole, so that the telescopic length of the handle rod can be adjusted, and the handle rod can be unlocked to enable the lower end to press against the joint to unlock.

As shown in fig. 7, the joint 4 comprises an upper joint block 41 connected with the lower end of the push rod and a lower joint block 42 connected with the upper end of the front foot rod 1, a locking clamping groove 43 is arranged between the upper joint block 41 and the lower joint block 42, the joint 4 further comprises a joint locking clamping block 44 and a joint locking resetting piece 45, the joint locking clamping block 44 is movably embedded in the locking clamping groove 43, the joint locking reset piece 45 is arranged between the joint locking clamping block 44 and the upper joint block 41 or the lower joint block 42, correspondingly, a joint unlocking guide inclined plane 46 is arranged on one side surface of the joint locking clamping block 44 departing from the joint locking reset piece 45, when the lower end of the handle rod directly or indirectly props against the joint unlocking guide inclined plane 46, the joint locking fixture 44 can be disengaged from the locking fixture groove 43 on the upper joint block 41 or the lower joint block 42, and the lower joint block 42 can rotate relative to the upper joint block 41.

The utility model discloses in, joint 4 still includes wedge 47, wedge 47 have with joint unblock direction inclined plane 46 complex wedge 471, when handle pole lower extreme conflict wedge 47 upper end makes wedge 471 extrude joint unblock direction inclined plane 46, can make joint locking fixture block 44 break away from last joint piece 41 or the locking draw-in groove 43 on the joint piece 42 down, and then joint piece 42 rotates under last joint piece 41 can be relative.

As shown in fig. 8 and 10, the second locking control assembly 9 includes a hook 91, a locking hook 92 and a locking hook reset member 93, the hook 91 is disposed on the sliding member 5, the middle portion of the locking hook 92 is hinged to the upper portion of the rear leg rod 2, the locking hook reset member 93 is disposed between one end of the locking hook 92 and the rear leg rod 2 to elastically press the locking hook 92 so that the locking hook 92 is snapped onto the hook 91, and the locking hook 92 is connected with an unlocking cord/belt 94 for pulling the locking hook 92 to disengage the locking hook 92 from the hook 91.

The utility model discloses when folding up, earlier corresponding handle that rotates first locking control assembly, the drive block then slides and stimulates linkage 83 by relative handle pole, linkage 83's lower extreme then stimulates slider 821, slider 821 then makes the spring bolt withdraw from the lockhole, at this moment, the handle pole push rod withdrawal relatively and regulation, and when the roof pressure wedge is triggered to the trigger block 822 roof pressure of handle pole lower extreme, the wedge is then roof pressure joint unblock direction inclined plane, make joint locking fixture block 44 break away from last joint block 41 or the locking draw-in groove 43 on the joint block 42 down, and then joint block 41 rotates relatively. Afterwards, the user again lifts the unblock stay cord/area 94 upwards, make latch hook 92 break away from with pothook 91, the slider is relieved the locking, under the effect of gravity, the push rod then turns over downwards and draws close to back foot pole 2, the slider slides towards the lower extreme of back foot pole 2, and draw preceding gangbar and back gangbar, make preceding foot pole 1 and push rod be close to back foot pole 2 completely, finally accomplish the back of folding up, as shown in fig. 11, whole frame is erectly the state, the user can single one-hand operate, the joint has been adopted, first locking control assembly and second locking control assembly three locking and unlocking structure, make frame unblock safe and go on in order, avoid the problem that the maloperation leads to pressing from both sides the wound.

As another embodiment of the utility model, an infant's carriage frame includes: the device comprises a front foot rod 1, a rear foot rod 2, a push rod 3, a sliding piece 5 and a rear linkage rod 7, wherein a front wheel assembly is arranged at the lower end of the front foot rod 1; the lower end of the rear foot rod 2 is provided with a rear wheel component; a joint 4 which can rotate relatively is arranged between the lower end of the push rod 3 and the upper end of the front foot rod 1, and the joint 4 can adopt a joint structure disclosed in Chinese patent 2016211829323.

The sliding part 5 is connected to the rear foot bar 2 and can slide relative to the rear foot bar 2, the lower end of the rear linkage bar 7 is connected with the sliding part 5 through a universal hinge structure, the upper end of the rear linkage bar 7 is directly or indirectly connected with the push rod 3 through a universal hinge structure, such as a spherical hinge structure, or the upper end of the rear linkage bar 7 is directly or indirectly connected with the push rod 3 through at least a second-stage hinge structure, as shown in fig. 11.

According to the requirement, the push rod in this embodiment may also be designed to be of a telescopic structure, the push rod 3 is provided with a first locking control component 8 for controlling the unlocking of the joint 4, the unlocking component disclosed in chinese patent 2016211829323 may be adopted for the first locking control component 8, a second locking control component 9 for locking the sliding component 5 on the rear foot rod 2 when the frame is unfolded is arranged between the rear foot rod 2 and the sliding component 5, and the second locking control component 9 is shown in fig. 10.

Claims

1. An infant carrier, comprising:

the lower end of the front foot rod (1) is provided with a front wheel assembly;

the lower end of the rear foot rod (2) is provided with a rear wheel assembly;

a joint (4) which can rotate relatively is arranged between the lower end of the push rod (3) and the upper end of the front foot rod (1);

the sliding piece (5) is connected to the rear foot rod (2) and can slide relative to the rear foot rod (2);

the lower end of the rear linkage rod (7) is connected with the sliding piece (5) through a universal hinge structure, the upper end of the rear linkage rod (7) is directly or indirectly connected with the push rod (3) through the universal hinge structure, or the upper end of the rear linkage rod (7) is directly or indirectly connected with the push rod (3) through at least two-stage rotatable hinge structures;

the upper part of the push rod (3) is telescopically connected with a handle rod (31), and a first locking control component (8) for controlling the handle rod (31) to stretch relative to the push rod (3) and controlling the handle rod (31) to retract and then to act on the joint (4) for unlocking is arranged between the handle rod (31) and the push rod (3);

and a second locking control component (9) used for locking the sliding part (5) on the rear foot rod (2) when the frame is unfolded is arranged between the rear foot rod (2) and the sliding part (5).

2. An infant carriage according to claim 1, characterized in that the slider (5) is hinged to a front linkage bar (6), the front end of the front linkage bar (6) being hinged directly or indirectly to the front foot bar (1).

3. A baby carriage according to claim 2, characterized in that a first cross bar (100) is provided between the two forelegs (1), the front linkage rod (6) being indirectly hinged to the forelegs (1) via the first cross bar (100).

4. A baby carriage according to claim 1, characterized in that a second cross bar (200) is provided between the two joints (4) or between the two front foot bars (1), the upper end of the rear foot bar (2) being hinged to the second cross bar (200) or to the seat plate.

5. A baby carriage according to claim 4, characterized in that the second cross bar (200) is provided with a hinge seat (201), the hinge seat (201) is provided with a hinge shaft hole (202), and the upper end of the rear foot bar (2) is rotatably connected to the corresponding hinge shaft hole (202).

6. A baby carriage according to claim 5, characterized in that the angle between the axes of the two hinge shaft holes (202) is α, 180 ° > α > 90 °, and the angle between the axis of the hinge shaft hole (202) and the axis of the second cross bar (200) is β < 90 °.

7. A baby carriage according to claim 1, characterized in that the first locking control assembly (8) includes a handle switch assembly (81) provided on the handle bar (31) and a handle bar locking assembly (82) provided between the end of the handle bar (31) and the push rod, a linkage (83) being provided between the handle switch assembly (81) and the handle bar locking assembly (82).

8. A baby carriage according to claim 7, characterized in that the handle switch assembly (81) comprises a handle (811) rotatably arranged on the handle bar (31) and a driving block (812) axially slidably arranged in the handle bar (31), the driving block (812) is provided with a driving inclined groove (813), the inner side of the handle (811) is provided with a bayonet (814) extending into the driving inclined groove (813) to act the driving block (812) to slide along the handle bar (31), and the driving block (812) is connected with a linkage (83);

the handle bar locking assembly (82) comprises a sliding block (821), a triggering block (822), a bolt (823) and an elastic resetting piece (824), the sliding block (821) is slidably arranged on the triggering block (822), two ends of the elastic resetting piece (824) respectively abut against the sliding block (821) and the triggering block (822), the lower end of the linkage piece (83) is connected with the sliding block (821), a guide inclined groove (825) is arranged on the sliding block (821), a telescopic control groove (826) radially arranged along the handle bar (31) is arranged on the triggering block (822), the bolt (823) penetrates through the guide inclined groove (825) and the telescopic control groove (826) through a pin shaft and is connected onto the triggering block (822), the handle bar locking assembly (82) further comprises a lock hole (827) arranged on the push rod and used for being matched with the bolt (823), and when the linkage piece (83) pulls the sliding block (821), the free end of the bolt (823) exits the lock hole (827) so that the handle rod (31) can slide telescopically relative to the push rod.

9. A baby carriage according to claim 1, characterized in that the joint (4) comprises an upper joint block (41) connected to the lower end of the push rod and a lower joint block (42) connected to the upper end of the front foot bar (1), a locking slot (43) is provided between the upper joint block (41) and the lower joint block (42), the joint (4) further comprises a joint locking block (44) and a joint locking reset piece (45), the joint locking block (44) is movably embedded in the locking slot (43), the joint locking reset piece (45) is provided between the joint locking block (44) and the upper joint block (41) or the lower joint block (42), correspondingly, a joint unlocking guide inclined plane (46) is provided on a side of the joint locking block (44) facing away from the joint locking reset piece (45), when the lower end of the handle bar directly or indirectly abuts against the joint unlocking guide inclined plane (46), the joint locking clamping block (44) can be separated from the locking clamping groove (43) on the upper joint block (41) or the lower joint block (42), and then the lower joint block (42) can rotate relative to the upper joint block (41).

10. A stroller frame according to claim 9, characterized in that the joint (4) further comprises a wedge (47), the wedge (47) has a wedge surface (471) cooperating with the joint unlocking guide slope (46), when the lower end of the handle bar abuts against the upper end of the wedge (47) so that the wedge surface (471) presses the joint unlocking guide slope (46), the joint locking block (44) can be disengaged from the locking groove (43) on the upper joint block (41) or the lower joint block (42), and the upper joint block (41) can rotate relative to the lower joint block (42).

11. An infant carrier according to any one of claims 1-10, characterized in that the second lock control assembly (9) includes a hook (91), a latch hook (92), and a latch hook reset member (93), the hook (91) is provided on the slider (5), the middle portion of the latch hook (92) is hinged to the upper portion of the rear foot bar (2), the latch hook reset member (93) is provided between one end of the latch hook (92) and the rear foot bar (2) to elastically press against the latch hook (92) so that the latch hook (92) snaps onto the hook (91), and the latch hook (92) is connected with an unlocking cord/strap (94) for pulling the latch hook (92) to disengage the latch hook (92) from the hook (91).

12. A baby carriage according to any one of claims 1-10, characterized in that the universal joint is a ball joint and the two-stage rotatable joint comprises a first steering joint (71) and a second steering joint (72), the first steering joint (71) being directly or indirectly pivoted to the push rod (3), one end of the second steering joint (72) being pivoted to the first steering joint (71), the other end of the second steering joint (72) being relatively fixedly connected to the rear linkage (7).

13. An infant carrier, comprising:

the lower end of the rear foot rod (2) is provided with a rear wheel assembly;

the lower end of the rear linkage rod (7) is connected with the sliding piece (5) through a universal hinge structure, the upper end of the rear linkage rod (7) is directly or indirectly connected with the push rod (3) through the universal hinge structure, or the upper end of the rear linkage rod (7) is directly or indirectly connected with the push rod (3) through at least a secondary hinge structure;

a first locking control component (8) for controlling the joint (4) to unlock is arranged on the push rod (3);