CN113460145A - Improved generation baby's shallow folding chassis - Google Patents

Abstract

The invention discloses an improved baby stroller folding frame, which comprises a front foot group, a rear foot group, a handle group, a rotating joint and the like, wherein the handle group of the folding frame can ensure that a wheel set close to one side of the folding frame can directionally roll and a wheel set far away from one side of the folding frame can universally rotate no matter the handle group is pushed forwards close to the front foot group or close to the rear foot group, so that the use process is more comfortable; simultaneously, the front wheel group and the rear wheel group after the frame of the baby stroller is folded can be locked into a directional rolling state, so that the frame after being folded can be better ensured to stand stably, and the folding frame can be more conveniently stored and placed. In addition, no matter the hand (hold) group rotates to with preceding foot group homonymy or back foot group homonymy, can both directly fold, obviously the process of whole folding operation is simpler to provide better experience for the user and feel.

Description

Improved generation baby's shallow folding chassis

Technical Field

The invention relates to a folding frame, in particular to an improved folding frame of a baby stroller.

Background

At present, for the convenience of use, the handle group is designed into a structure capable of reversing front and back, namely, the handle group can be rotated to the same side with the rear foot group and can also be rotated to the same side with the front foot group; however, for the baby stroller, when the handle group is pushed forwards, the wheel group close to one side of the handle group can directionally roll, and the wheel group far away from one side of the handle group can rotate universally to be the most comfortable to use. Simultaneously, after whole frame is folding, preceding wheelset and back wheelset all can be in universal rotating state, will lead to frame after folding to be unable steadily stand like this, and the influence is accomodate and is laid. In addition, the folding frame of the baby stroller, which can be used by reversing the front and the back of the handle group, can be folded only by rotating the handle group to the same side as the back foot group, so that in the actual use process, if the handle group rotates to the same side as the front foot group, the user needs to worry about rotating the handle group to the same side as the back foot group again, and therefore, the structural design of the folding frame has the defects of great defects, troublesome folding process and poor experience.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an improved baby stroller folding frame which is simple to fold, comfortable to use, stable to store and stand and good in experience.

The technical problem of the invention is realized by the following technical scheme:

an improved baby stroller folding frame comprises a front foot group, a rear foot group and a handle group, wherein the upper end of the front foot group, the upper end of the rear foot group and the lower end of the handle group are coaxially hinged to form a rotary joint; the lower end of the front foot set is provided with a front wheel set and a front wheel lock, the lower end of the rear foot set is provided with a rear wheel set and a rear wheel lock, joint locks respectively connected with the front wheel lock and the rear wheel lock are arranged in the rotary joints, when the frame of the baby stroller is unfolded, the handle set rotates to the same side as the rear foot set, the front wheel lock is unlocked by the joint locks, the rear wheel lock is locked by the joint locks, and the corresponding front wheel set universally rotates and the rear wheel set directionally rolls; the handle group rotates to the same side with the front foot group, the front wheel lock is locked by the joint lock, the rear wheel lock is unlocked by the joint lock, and the corresponding front wheel group rolls in a directional mode and the rear wheel group rotates in a universal mode; the handle group rotates to a position between the front foot group and the rear foot group, the front wheel lock and the rear wheel lock are unlocked by the joint lock, and the corresponding front wheel group and the corresponding rear wheel group rotate in a universal mode; when the frame of the baby stroller is folded, the handle group, the front foot group and the rear foot group are folded and closed, the front wheel lock and the rear wheel lock are locked by the joint lock, and the corresponding front wheel group and the corresponding rear wheel group roll in a directional mode.

The rotary joint is formed by coaxially and rotatably hinging a front rotary table at the upper end of the front foot set, a rear rotary table at the upper end of the rear foot set and a lower rotary table at the lower end of the handle set.

The joint lock comprises a driving arc groove and a resetting arc groove which are arranged on the lower rotary table and take the rotating shaft center as the center of a circle, and also comprises a front sliding block which is arranged on the front rotary table and performs lifting sliding and a rear sliding block which is arranged on the rear rotary table and performs lifting sliding; the outer diameter of the driving arc groove is smaller than that of the reset arc groove, and a connected climbing slope is arranged between the driving arc groove and the reset arc groove; the front sliding block is connected with the front wheel lock, and the rear sliding block is connected with the rear wheel lock.

When the frame of the baby stroller is unfolded, the handle group rotates to the same side as the rear foot group and drives the front sliding block to slide along the driving arc groove and the rear sliding block to slide along the resetting arc groove, the front sliding block ascends to move to unlock the front wheel lock, the rear sliding block descends to move to lock the rear wheel lock, and the corresponding front wheel set universally rotates and the rear wheel set directionally rolls; the handle group rotates to the same side as the front foot group and drives the front sliding block to slide along the reset arc groove and the rear sliding block to slide along the driving arc groove, the front sliding block descends to move to lock the front wheel lock, the rear sliding block ascends to move to unlock the rear wheel lock, and the corresponding front wheel group directionally rolls and the rear wheel group universally rotates; the handle group rotates to a position between the front foot group and the rear foot group, the front sliding block and the rear sliding block are driven to slide along the driving arc groove, the front sliding block and the rear sliding block move upwards to unlock the front wheel lock and the rear wheel lock, and the corresponding front wheel group and the corresponding rear wheel group rotate universally.

When the frame of the baby stroller is folded, the handle group, the front foot group and the rear foot group are folded and closed, the front sliding block and the rear sliding block are driven to slide along the reset arc groove, the front sliding block and the rear sliding block are moved downwards to lock the front wheel lock and the rear wheel lock, and the corresponding front wheel group and the corresponding rear wheel group are both directionally rolled.

The baby stroller is characterized in that a front sliding column which penetrates through a rear turntable and forms action fit with the driving arc groove or the reset arc groove is arranged on the front sliding block, a rear sliding column which forms action fit with the driving arc groove or the reset arc groove is arranged on the rear sliding block, a stroke groove for the front sliding column to penetrate through is formed in the rear turntable, and the baby stroller frame can drive the front sliding column to reciprocate in the stroke groove when unfolded or folded.

The front rotary disk is provided with a front sliding groove extending along the diameter line of the front rotary disk, and the front sliding block is assembled in the front sliding groove and performs lifting sliding; the rear turntable is provided with a rear sliding groove extending along the diameter line of the rear turntable, and the rear sliding block is assembled in the rear sliding groove and slides in a lifting manner.

A locking tooth is arranged between the lower turntable and the rear turntable, and when the frame of the baby stroller is unfolded, the locking tooth is elastically pushed and clamped between the lower turntable and the rear turntable to form locking; the handle group is provided with a handle for driving the lock teeth to be separated from the lower turntable.

When the frame of the baby stroller is folded, the handle group is folded and gathered relative to the front foot group or the rear foot group and drives the locking block to slide along the driving arc groove, and the locking block is separated from the front rotary disc and enables the rear rotary disc and the front rotary disc to be unlocked.

The front wheel lock comprises a front lock rod arranged at the lower end of the front foot group and used for elastically pushing and moving downwards and a front lock hole arranged on the front wheel group and matched with the front lock rod, and a front pull rope connected between the front lock rod and the front sliding block; the rear wheel lock comprises a rear lock rod arranged at the lower end of the rear foot group and used for elastically pushing and moving downwards and a rear lock hole arranged on the rear wheel group and matched with the rear lock rod, and a rear pull rope connected with the rear lock rod is arranged between the rear lock rod and the rear sliding block.

Compared with the prior art, the foldable baby stroller frame with the improved structure is mainly designed, and the handle group of the foldable baby stroller frame can ensure that the wheel set close to one side of the foldable baby stroller frame can roll directionally and the wheel set far away from one side of the foldable baby stroller frame can rotate universally no matter the handle group is close to the front foot group or the rear foot group to push forwards, so that the foldable baby stroller frame is more comfortable in use; simultaneously, the front wheel group and the rear wheel group after the frame of the baby stroller is folded can be locked into a directional rolling state, so that the frame after being folded can be better ensured to stand stably, and the folding frame can be more conveniently stored and placed. In addition, no matter the hand (hold) group rotates to with preceding foot group homonymy or back foot group homonymy, can both directly fold, obviously the process of whole folding operation is simpler to provide better experience for the user and feel.

Drawings

Fig. 1 is a schematic structural view illustrating the handle assembly of the present invention rotated to the same side as the rear leg assembly.

Fig. 2 is a perspective view of fig. 1.

Fig. 3 is a schematic sectional structure view of the joint lock in the state of fig. 1.

Fig. 4 is a schematic sectional view of the front wheel lock in the state of fig. 1.

Fig. 5 is a schematic sectional view of the rear wheel lock in the state of fig. 1.

Fig. 6 is a schematic view of the handlebar assembly of the present invention rotated to the same side as the front leg assembly.

Fig. 7 is a perspective view of fig. 6.

Fig. 8 is a schematic sectional view of the joint lock in the state of fig. 6.

Fig. 9 is a cross-sectional structural view of the front wheel lock in the state of fig. 6.

Fig. 10 is a sectional view schematically showing the rear wheel lock in the state of fig. 6.

Fig. 11 is a schematic structural view illustrating the handlebar assembly of the present invention rotated to a position between the front leg assembly and the rear leg assembly.

Fig. 12 is a schematic sectional view of the joint lock in the state of fig. 11.

Fig. 13 is a schematic structural view of the handle set after being folded.

Fig. 14 is a cross-sectional structural view of the joint lock in the state of fig. 13.

Fig. 15 is a schematic sectional view of the joint lock when the stroller frame is unfolded.

Fig. 16 is an exploded perspective view of the forefoot assembly.

Fig. 17 is an exploded perspective view of the hindfoot assembly.

Fig. 18 is a schematic structural view of the lower turntable.

Fig. 19 is a structural diagram of the foot assembly after the handle assembly is folded and gathered.

Fig. 20 is a schematic structural view of the handle assembly of fig. 19 driving the rear leg assembly and the front leg assembly to fold.

Fig. 21 is a schematic structural view of the handle assembly folded and gathered together with the front leg assembly.

Fig. 22 is a schematic structural view of the handle assembly in fig. 21 driving the front leg assembly and the rear leg assembly to fold.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the above drawings.

As shown in fig. 1 to 22, the bicycle comprises a front leg set 1, a front wheel set 11, a rear leg set 2, a rear wheel set 21, a rear wheel set 3, a handle set 31, a handle 32, a knob 4, a rotary joint 41, a front rotary disc, a front sliding chute 411, a rear sliding chute 42, a rear rotary disc 421, a travel chute 422, a rear sliding chute 43, a lower rotary disc 44, a locking tooth 441, a locking tooth spring 45, a locking block 451, a locking block spring 5, a joint lock 51, a driving arc chute 52, a reset arc chute 53, a climbing slope 54, a front sliding block 541, a front sliding column 55, a rear sliding block 551, a rear sliding column 6, a front wheel lock 61, a front lock rod 62, a front lock spring 63, a front pull rope 64, a front lock hole 7, a rear wheel lock 71, a rear lock rod 72, a rear lock spring 73, a rear pull rope 74 and a rear lock hole.

An improved foldable frame of a baby stroller is shown in fig. 1 and fig. 2, and relates to a foldable frame of a baby stroller for a baby to go out, which structurally comprises a front leg group 1, a rear leg group 2, a handle group 3 and the like, wherein the lower end of the front leg group 1 is provided with a front wheel group 11 and a front wheel lock 6, and the lower end of the rear leg group 2 is provided with a rear wheel group 21 and a rear wheel lock 7; the upper end of the front leg assembly 1, the upper end of the rear leg assembly 2 and the lower end of the handle assembly 3 are coaxially hinged to form a rotary joint 4, and the rotary joints are respectively arranged on two sides of the folding frame in the embodiment, and because the rotary joints 4 on two sides and the arrangement structure in the rotary joints 4 are completely the same, the embodiment is structurally described by taking only one rotary joint 4 as an example.

The rotary joint 4 is formed by coaxially and rotatably hinging a front rotary disc 41 with a circular upper end of the front leg group 1, a rear rotary disc 42 with a circular upper end of the rear leg group 2 and a lower rotary disc 43 with a circular lower end of the handle group 3, namely the front rotary disc 41, the rear rotary disc 42 and the lower rotary disc 43 which are coaxially hinged can rotate mutually, so that the frame of the baby stroller can be unfolded or folded.

The rotary joint 4 in be equipped with the joint lock 5 of connecting front wheel lock 6 and rear wheel lock 7 respectively, this joint lock is including setting up drive arc groove 51 and the arc groove 52 that resets on carousel 43 with the rotation axis as the centre of a circle, just in time form a circle-shaped closed track after linking to each other through climbing slope 53 between drive arc groove 51 and the arc groove 52 that resets to drive arc groove 51 external diameter need be less than the arc groove 52 external diameter that resets, it is also more protruding being close to that the relative rotation axis of drive arc groove 51 is more, the relative rotation axis of the arc groove 52 that resets is more for the indent to keep away from.

The joint lock 5 further comprises a front sliding block 54 arranged on the front rotary disc 41 and a rear sliding block 55 arranged on the rear rotary disc 42, and the specific structure is as follows: the front turntable 41 is provided with a front sliding chute 411 extending along the diameter line of the front rotary disk, and a front sliding block 54 is assembled in the front sliding chute 411 and can perform lifting sliding, namely can perform linear reciprocating movement along the diameter line of the front rotary disk; the rear turntable 42 is provided with a rear sliding groove 422 extending along the diameter line of the rear turntable, the rear sliding block 55 is assembled in the rear sliding groove 422 and can perform lifting sliding, namely, the rear sliding block can perform linear reciprocating movement along the diameter line of the rear turntable, the joint lock 5 is respectively connected with the front wheel lock 6 and the rear wheel lock 7, in fact, the front sliding block 54 is connected with the front wheel lock 6, and the rear sliding block 55 is connected with the rear wheel lock 7.

Meanwhile, the front turntable 41, the rear turntable 42 and the lower turntable 43 are formed by overlapping and coaxially rotating and hinging, so that a front sliding column 541 passing through the rear turntable 42 is required to be arranged on the front sliding block 54 and is in action fit with the driving arc groove 51 or the reset arc groove 52 through the front sliding column, a corresponding stroke groove 421 for the front sliding column 541 to pass through is required to be arranged on the rear turntable 42, and the front sliding column 541 is required to be ensured to be capable of reciprocating in the stroke groove 421 when the stroller frame is unfolded or folded. Since the rear slider 55 is designed to be adjacent to the lower turntable 43, the rear slider 551 only needs to be operatively engaged with the driving arc groove 51 or the reset arc groove 52.

The front wheel lock 6 comprises a front lock rod 61 which is arranged in a mounting seat at the lower end of the front foot group 1 and is elastically pushed by a front lock spring 62 to move downwards and a front lock hole 64 which is arranged on the front wheel group 11 and is assembled with the front lock rod 61, and the front lock rod 61 is connected with the front sliding block 54 through a front pull rope 63.

The rear wheel lock 7 comprises a rear lock bar 71 which is arranged in a mounting seat at the lower end of the rear foot group 2 and is elastically pushed by a rear lock spring 72 to move downwards and a rear lock hole 74 which is arranged on the rear wheel group 21 and is assembled with the rear lock bar 71, and the rear lock bar 71 is connected with the rear sliding block 55 through a rear pull rope 73.

Thus, when the stroller frame is unfolded, the handle set 3 can be rotated to the same side as the rear leg set 2, and then the front slider 54 can be driven to slide along the driving arc groove 51 and then the rear slider 55 can slide along the resetting arc groove 52, because the driving arc groove 51 and the resetting arc groove 52 have the difference in outer diameter dimension, the front slider 54 sliding along the driving arc groove 51 with smaller outer diameter dimension can move upwards in the front sliding groove 411, and then the front lock rod 61 is pulled through the front pull rope 63 to overcome the downward pushing elasticity of the front lock spring 62 and break away from the front lock hole 64, namely the front wheel lock 6 is unlocked by the joint lock 5, and the front wheel set 11 can form universal rotation.

The rear sliding block 55 sliding along the reset arc groove 52 with a larger outer diameter is located at a position of descending movement in the rear sliding groove 422 relative to the front sliding block 54, because the rear lock spring 72 pushes the rear lock rod 71 to move downwards to enter the rear lock hole 74 of the rear wheel set 21, the rear lock rod 71 moves downwards to form a trend of synchronous descending movement by pulling the rear sliding block 55 through the rear pull rope 73, the trend of synchronous descending movement is realized just by the reset arc groove 52 with a larger outer diameter, the rear lock rod 71 enters the rear lock hole 74 to lock the rear wheel lock 7, namely the rear wheel lock 7 is locked by the joint lock 5, and the rear wheel set 21 rolls in a front-rear directional manner.

The handle group 3 can also rotate to the same side as the front foot group 1, and then the rear slide block 55 is driven to slide along the driving arc groove 51 and the front slide block 54 slides along the resetting arc groove 52, the action process and the structure matching relation of the handle group 3 are just opposite to the situation that the handle group 3 rotates to the same side as the rear foot group 2, namely, the front slide block 54 can descend and move to enter the front lock hole 64 through the front lock rod 61, so that the front wheel lock 6 is locked by the joint lock 5, and the front wheel group 11 forms front and rear directional rolling. Then the sliding block 55 will move up, and the rear lock rod 71 will be pulled by the rear pull rope 73 to be separated from the rear lock hole 74, so that the rear wheel lock 7 is unlocked by the joint lock 5, and the rear wheel set 21 will rotate in a universal direction.

The handle set 3 can also rotate to a position between the front foot set 1 and the rear foot set 2, and drives the front slider 54 and the rear slider 55 to slide along the driving arc groove 51, at the moment, the front slider 54 moves upwards in the front sliding groove 411 and pulls the front lock rod 61 to be separated from the front lock hole 64 through the front pull rope 63, the rear slider 55 moves upwards in the rear sliding groove 422 and pulls the rear lock rod 71 to be separated from the rear lock hole 74 through the rear pull rope 73, the joint lock 5 unlocks the front wheel lock 6 and the rear wheel lock 7 at the same time, and the corresponding front wheel set 11 and the corresponding rear wheel set 21 can both rotate universally.

When the frame of the baby stroller is folded, the handle group 3, the front leg group 1 and the rear leg group 2 are folded and gathered, in practical use, the handle group 3 can be folded and gathered relative to the front leg group 1 and can also be folded and gathered relative to the rear leg group 2, and drives the front slider 54 and the rear slider 55 to slide along the reset arc groove 52, at the moment, the front slider 54 descends in the front sliding groove 411 to move so that the front lock rod 61 enters the front lock hole 64, the rear slider 55 descends in the rear sliding groove 422 to move so that the rear lock rod 71 enters the rear lock hole 74, the front wheel lock 6 and the rear wheel lock 7 are simultaneously locked by the joint lock 5, and the corresponding front wheel set 11 and the corresponding rear wheel set 21 both roll in a front-rear directional mode.

In addition, the unfolding or folding structure of the frame is mainly characterized in that a locking tooth 44 is arranged between the lower rotary disc 43 and the rear rotary disc 42, and a locking block 45 is arranged between the rear rotary disc 42 and the front rotary disc 41. When the stroller frame is unfolded, the locking teeth 44 are elastically pushed and clamped between the lower turntable 43 and the rear turntable 42 by the locking teeth spring 441 to form locking, the locking blocks 45 are elastically pushed and clamped between the rear turntable 42 and the front turntable 41 by the locking block spring 451 to form locking, and at the moment, the front turntable 41, the rear turntable 42 and the lower turntable 43 cannot rotate relatively, so that the stroller frame can be unfolded for use.

When the stroller frame is folded, the handle group 3 is firstly shortened through the handle knob 32 at the top of the handle group 3, then the handle 31 at the side of the handle group 3 is pulled upwards to drive the locking teeth 44 to be separated from the lower rotary disc 43, at this time, the handle group 3 can be folded and folded relative to the front leg group 1 or the rear leg group 2, the lower rotary disc 43 can drive the locking block 45 to slide along the driving arc groove 51 along with the folding operation of the handle group 3, and the locking block 45 is separated from the front rotary disc 41, so that the rear rotary disc 42 and the front rotary disc 41 are unlocked, and the front rotary disc 41 and the rear rotary disc 42 can be mutually folded and folded.

The handle group 3 of the folding frame can ensure that the wheel set close to one side of the folding frame can directionally roll and the wheel set far away from one side of the folding frame can universally rotate no matter the handle group is pushed forwards close to the front foot group 1 or close to the rear foot group 2, so that the folding frame is more comfortable in use; simultaneously, the front wheel set 1 and the rear wheel set 2 after the frame of the baby stroller is folded can be locked into a directional rolling state, so that the frame after being folded can be better ensured to stand stably, and the folding frame can be more conveniently stored and placed. In addition, no matter the hand (hold) group 3 rotates to with preceding foot group 1 homonymy or back foot group 2 homonymy, can both directly fold, obviously the process of whole folding operation is simpler to provide better experience for the user and feel.

The above description is only a specific embodiment of the present invention, and those skilled in the art should understand that any similar structural design to the embodiment is included in the protection scope of the present invention.

Claims (10)

1. An improved baby stroller folding frame comprises a front foot group (1), a rear foot group (2) and a handle group (3), wherein the upper end of the front foot group (1), the upper end of the rear foot group (2) and the lower end of the handle group (3) are coaxially hinged to form a rotary joint (4); preceding foot group (1) lower extreme be equipped with preceding wheelset (11) and front wheel lock (6), back foot group (2) lower extreme is equipped with rear wheel group (21) and rear wheel lock (7), is equipped with joint lock (5) of connecting front wheel lock (6) and rear wheel lock (7) respectively in revolute joint (4), its characterized in that:

a. when the frame of the baby stroller is unfolded, the handle group (3) rotates to the same side as the rear foot group (2), the front wheel lock (6) is unlocked by the joint lock (5), the rear wheel lock (7) is locked by the joint lock (5), the corresponding front wheel group (11) rotates in a universal direction, and the rear wheel group (21) rolls in a directional manner; the handle group (3) rotates to the same side as the front foot group (1), the front wheel lock (6) is locked by the joint lock (5), the rear wheel lock (7) is unlocked by the joint lock (5), the corresponding front wheel group (11) rolls directionally, and the rear wheel group (21) rotates universally; the handle group (3) rotates to a position between the front foot group (1) and the rear foot group (2), the front wheel lock (6) and the rear wheel lock (7) are unlocked by the joint lock (5), and the corresponding front wheel group (11) and the corresponding rear wheel group (21) rotate in a universal mode;

b. when the frame of the baby stroller is folded, the handle group (3), the front foot group (1) and the rear foot group (2) are folded and closed, the front wheel lock (6) and the rear wheel lock (7) are locked by the joint lock (5), and the corresponding front wheel group (11) and the corresponding rear wheel group (21) roll in a directional mode.

2. The improved foldable frame of baby stroller as claimed in claim 1, wherein the rotary joint (4) is formed by coaxially and rotatably hinging a front rotary disc (41) at the upper end of the front leg assembly (1), a rear rotary disc (42) at the upper end of the rear leg assembly (2) and a lower rotary disc (43) at the lower end of the handle assembly (3).

3. The improved foldable frame of baby carriage as claimed in claim 2, wherein said joint lock (5) comprises a driving arc groove (51) and a restoring arc groove (52) which are arranged on the lower turntable (43) and use the rotation axis as the center of circle, a front slide block (54) which is arranged on the front turntable (41) and can slide up and down, and a rear slide block (55) which is arranged on the rear turntable (42) and can slide up and down; the outer diameter of the driving arc groove (51) is smaller than that of the reset arc groove (52), and a climbing slope (53) connected with the driving arc groove (51) and the reset arc groove (52) is arranged between the driving arc groove (51) and the reset arc groove; the front sliding block (54) is connected with the front wheel lock (6), and the rear sliding block (55) is connected with the rear wheel lock (7).

4. An improved stroller frame according to claim 3, wherein when the stroller frame is unfolded, the handle assembly (3) rotates to the same side as the rear leg assembly (2) and drives the front slider (54) to slide along the driving arc groove (51) and the rear slider (55) to slide along the restoring arc groove (52), the front slider (54) moves upwards to unlock the front wheel lock (6) and the rear slider (55) moves downwards to lock the rear wheel lock (7), the corresponding front wheel set (11) rotates universally and the rear wheel set (21) rolls directionally; the handle group (3) rotates to the same side as the front foot group (1) and drives the front sliding block (54) to slide along the reset arc groove (52) and the rear sliding block (55) to slide along the driving arc groove (51), the front sliding block (54) descends to move to lock the front wheel lock (6), the rear sliding block (55) ascends to move to unlock the rear wheel lock (7), and the corresponding front wheel group (11) directionally rolls and the rear wheel group (21) universally rotates; the handle group (3) rotates to a position between the front foot group (1) and the rear foot group (2), the front sliding block (54) and the rear sliding block (55) are driven to slide along the driving arc groove (51), the front sliding block (54) and the rear sliding block (55) are lifted to unlock the front wheel lock (6) and the rear wheel lock (7), and the corresponding front wheel group (11) and the corresponding rear wheel group (21) rotate universally.

5. The improved stroller frame as claimed in claim 3, wherein when the stroller frame is folded, the handle set (3), the front leg set (1) and the rear leg set (2) are folded and closed, and the front slider (54) and the rear slider (55) are driven to slide along the return arc groove (52), the front slider (54) and the rear slider (55) are moved downwards to lock the front wheel lock (6) and the rear wheel lock (7), and the corresponding front wheel set (11) and the corresponding rear wheel set (21) are both directionally rolled.

6. The improved foldable frame of baby stroller according to claim 3, wherein the front sliding block (54) is provided with a front sliding post (541) passing through the rear rotary plate (42) and forming a motion fit with the driving arc groove (51) or the reset arc groove (52), the rear sliding block (55) is provided with a rear sliding post (551) forming a motion fit with the driving arc groove (51) or the reset arc groove (52), the rear rotary plate (42) is provided with a stroke groove (421) for the front sliding post (541) to pass through, and the unfolding or folding of the frame of baby stroller can drive the front sliding post (541) to move back and forth in the stroke groove (421).

7. An improved foldable frame for baby stroller according to claim 3, wherein said front rotary disk (41) is provided with a front sliding slot (411) extending along the diameter line of the front rotary disk, said front sliding block (54) is fitted in the front sliding slot (411) and slides up and down; the rear turntable (42) is provided with a rear sliding groove (422) extending along the diameter line of the rear turntable, and the rear sliding block (55) is assembled in the rear sliding groove (422) and performs lifting sliding.

8. The improved foldable frame of baby stroller according to claim 2, wherein a locking tooth (44) is provided between the lower turntable (43) and the rear turntable (42), when the frame of baby stroller is unfolded, the locking tooth (44) is elastically pushed and clamped between the lower turntable (43) and the rear turntable (42) to form a lock; the handle group (3) is provided with a handle (31) for driving the lock teeth (44) to be separated from the lower turntable (43).

9. The improved stroller folding frame according to claim 2, wherein a locking block (45) is disposed between the rear turntable (42) and the front turntable (41), when the stroller frame is unfolded, the locking block (45) is elastically pushed and clamped between the rear turntable (42) and the front turntable (41) to form a lock, when the stroller frame is folded, the handle set (3) is folded and closed relative to the front leg set (1) or the rear leg set (2) and drives the locking block (45) to slide along the driving arc groove (51), the locking block (45) is disengaged from the front turntable (41), and the rear turntable (42) and the front turntable (41) are unlocked.

10. The improved foldable frame of baby carriage according to claim 1 is characterized in that the front wheel lock (6) comprises a front lock rod (61) disposed at the lower end of the front leg assembly (1) and making elastic pushing downward movement and a front lock hole (64) disposed on the front wheel assembly (11) and assembled with the front lock rod (61), a front pull rope (63) connected between the front lock rod (61) and the front slider (54) is provided; the rear wheel lock (7) comprises a rear lock rod (71) which is arranged at the lower end of the rear foot group (2) and is used for elastically pushing and moving downwards and a rear lock hole (74) which is arranged on the rear wheel group (21) and is assembled with the rear lock rod (71), and a rear pull rope (73) which is connected is arranged between the rear lock rod (71) and the rear sliding block (55).

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