CN220662609U - Child car frame - Google Patents

Abstract

The utility model discloses a child car frame which can move from an unfolding state to a folding state after unlocking a locking structure, and comprises a front leg frame, wherein a rear leg frame is connected to the front leg frame in a rotating mode around a first axis A, a supporting rod is connected to the rear leg frame in a rotating mode around a second axis B, a linkage rod capable of driving the front leg frame to close to the rear leg frame when the supporting rod is rotated to close to the rear leg frame is arranged between the supporting rod and the front leg frame, one end of the linkage rod is connected to the front leg frame in a rotating mode around a third axis C, the other end of the linkage rod is connected to the supporting rod in a rotating mode around a fourth axis D, a front wheel is connected to the lower end of the front leg frame, and a rear wheel is connected to the lower end of the rear leg frame. The utility model aims to overcome the defects of the prior art and provide the child cart which is convenient to fold and unfold, simple in structure and small in volume after folding.

Description

Child car frame

[ field of technology ]

The utility model relates to a child car frame.

[ background Art ]

At present, the child cart has become an indispensable article for the child in the growth process. The children's barrow on the market can be folded or unfolded generally, but the existing children's barrow is complex in transmission structure, more in connecting rods and larger in volume after folding. Therefore, a child stroller with a simple structure and a small size after folding is very desirable.

[ utility model ]

The utility model aims to overcome the defects of the prior art and provide the child cart which is convenient to fold and unfold, simple in structure and small in volume after folding.

The utility model is realized by the following technical scheme:

the utility model provides a children's frame can follow expansion state and remove to folding state after releasing locking structure's locking, includes preceding leg, preceding leg on rotate around first axis A and be connected with back leg, back leg on rotate around second axis B and be connected with the vaulting pole, vaulting pole and preceding leg between be equipped with the gangbar that can drive preceding leg and draw close to back leg when the vaulting pole rotates to back leg, gangbar one end rotate around third axis C and connect on preceding leg, the gangbar other end rotate around fourth axis D and connect on the vaulting pole, preceding leg lower extreme be connected with the front wheel, back leg lower extreme be connected with the rear wheel.

The rear leg frame include the rear leg, rear leg upper end be connected with convex connecting seat, rear leg lower extreme be connected with the rear wheel, the preceding leg frame including rotating around first axis A and connecting in the preceding leg of connecting seat front end, preceding leg lower extreme be connected with the front wheel, the vaulting pole rotate around second axis B and connect on the connecting seat.

The rear leg comprises two first rear leg rods, the tops of the two first rear leg rods are connected to the connecting seat, the rear wheels are connected to the lower ends of the first rear leg rods, the front legs comprise first front leg rods which are connected to the connecting seat in a rotating mode, the lower ends of the first front leg rods are connected with wheel forks, and the front wheels are connected to the wheel forks.

The rear leg include second rear leg pole and the third rear leg pole that the interval set up about two, the connection seat include left pedestal and the right pedestal of connecting in second rear leg pole and third rear leg pole top respectively, the rear wheel connect in the lower extreme of second rear leg pole and third rear leg pole, the front leg include around first axis A rotate the second preceding leg pole and the third preceding leg pole of connecting on left pedestal and right pedestal, the front wheel connect in the lower extreme of second preceding leg pole and third preceding leg pole, the vaulting pole include around second axis B rotate the left body of rod and the right body of rod of connecting on left pedestal and right pedestal.

The utility model provides a push rod that can slide in it on the vaulting pole, locking structure including locating between rear leg and the vaulting pole and can be with the locking subassembly of both locking, locking subassembly including locating the locking position on the rear leg, the vaulting pole on be equipped with the kayser spare that can slide and break away from or block into to locking position relatively, kayser spare and vaulting pole between be equipped with the elasticity reset piece that can push away kayser spare and reset, the vaulting pole in still be equipped with and can be pushed by the push rod when the push rod slides downwards and make the kayser spare break away from the pushing block of locking position, pushing block and push rod between be equipped with the reset spring that can make the pushing block reset.

The locking piece including locating the vaulting pole in and can follow the locking piece of vaulting pole upper and lower slip, the locking piece on be equipped with outside convex kayser arch, the locking position be located the kayser groove on the back leg, the back leg on still be equipped with kayser groove intercommunication and can be for the groove of stepping down of kayser arch when the relative back leg of vaulting pole rotates.

The utility model provides a seat is characterized by further comprising a rear leg frame, wherein the rear leg frame is also provided with a convex installation part, the installation part is connected with a seat assembly, the seat assembly comprises an installation seat which can be connected to the installation part, the installation seat is connected with a seat part, a handrail which can rotate relative to the seat part and is connected with a backrest part which can be unfolded or folded relative to the seat part, an adjusting assembly which can adjust the inclined included angle between the backrest part and the seat part is arranged between the backrest part and the seat part, and a locking assembly which can lock the seat part, the installation seat and the handrail and can be unlocked when the backrest part rotates and folds towards the seat part is arranged between the seat part and the installation seat part.

The locking assembly comprises a left shell arranged on the seat part and a right shell arranged on the mounting seat, a cavity is formed between the left shell and the right shell, a spline capable of sliding relative to the left shell is arranged in the cavity, spline grooves capable of being clamped with the spline grooves are formed in the left shell and the right shell, an elastic piece capable of enabling the spline to be clamped with the spline grooves in the left shell and the right shell simultaneously is arranged between the spline grooves and the right shell, a locking position is arranged on the handrail, a clamping protruding block capable of being clamped into the locking position when the spline grooves are clamped with the spline grooves in the right shell is arranged on the spline, a pushing piece capable of being driven by the backrest part to push the spline to be separated from the spline grooves in the left shell is further arranged between the backrest part and the seat part, and a driving part capable of pushing the pushing piece to slide when the spline is rotated and folded relative to the seat part is further arranged on the backrest part.

The pushing piece comprises a column body, a convex column extending into the left shell body is arranged on the column body, the driving part is a bulge arranged along the circumference, a groove capable of accommodating the driving part is formed in the column body, a first inclined sliding surface is formed in the groove, and a second inclined sliding surface capable of propping against the first inclined sliding surface to enable the pushing piece to slide when the driving part rotates along with the backrest part is formed in the driving part.

The locking position is a locking groove arranged on the handrail, the clamping convex blocks are clamped in the locking groove, and pushing inclined planes which can be propped against the edges of the locking groove to enable the clamping convex blocks to be separated from the locking groove are arranged on two sides of the clamping convex blocks.

Compared with the prior art, the utility model has the following advantages: when the child car frame is folded, the locking structure is unlocked firstly, then the supporting rod is pushed to rotate around the second axis B relative to the rear leg frame, the supporting rod is pushed to gradually draw close to the rear leg frame when rotating, when the supporting rod rotates, the supporting rod drives one end of the linkage rod to move, one end of the linkage rod moves along with the supporting rod and rotates around the fourth axis D relative to the supporting rod, the other end of the linkage rod moves along with the movement and rotates around the third axis C relative to the front leg frame, at the moment, the other end of the linkage rod pulls the front leg frame to rotate around the first axis A relative to the rear leg frame and draw close to the rear leg frame, and the whole child car frame is folded when the front leg frame and the rear leg frame draw close to each other; the folding operation of the child car frame is convenient, the folding operation of the whole car can be completed only by pushing the stay bars to close the rear leg frames, the folding structure is simple, and the child car frame is convenient for a adult to operate and fold.

[ description of the drawings ]

FIG. 1 is one of the perspective views of embodiment 1 of the child car frame of the present utility model;

FIG. 2 is a side view of embodiment 1 of the child car frame of the present utility model;

FIG. 3 is one of the state diagrams of the child car frame of embodiment 1 of the present utility model when folded;

FIG. 4 is a second view of the child car frame of embodiment 1 of the present utility model when folded;

FIG. 5 is a state diagram of the child car frame of embodiment 1 of the present utility model when folded;

FIG. 6 is a second perspective view of embodiment 1 of the child car frame of the present utility model;

FIG. 7 is an exploded view of the locking assembly of embodiment 1 of the child car frame of the present utility model;

FIG. 8 is one of the cross-sectional views of embodiment 1 of the child car frame of the present utility model;

FIG. 9 is a second cross-sectional view of embodiment 1 of the child car frame of the present utility model;

FIG. 10 is one of the exploded views of the seat assembly of embodiment 1 of the child car frame of the present utility model;

FIG. 11 is a second exploded view of the seat assembly of embodiment 1 of the child car frame of the present utility model;

fig. 12 is a perspective view of embodiment 2 of the child car frame of the present utility model.

[ detailed description ] of the utility model

The utility model is further described below with reference to the accompanying drawings:

example 1: as shown in fig. 1 to 11, the utility model provides a child car frame, which can move from an unfolded state to a folded state after unlocking a locking structure, and comprises a front leg frame 11, wherein a rear leg frame 12 is rotatably connected on the front leg frame 11 around a first axis a, a supporting rod 13 is rotatably connected on the rear leg frame 12 around a second axis B, a linkage rod 14 capable of driving the front leg frame 11 to close to the rear leg frame 12 when the supporting rod 13 is rotatably closed to the rear leg frame 12 is arranged between the supporting rod 13 and the front leg frame 11, one end of the linkage rod 14 is rotatably connected on the front leg frame 11 around a third axis C, the other end of the linkage rod 14 is rotatably connected on the supporting rod 13 around a fourth axis D, the lower end of the front leg frame 11 is connected with a front wheel 111, and the lower end of the rear leg frame 12 is connected with a rear wheel 121.

When the child car frame is folded, the locking structure is unlocked firstly, then the supporting rod 13 is pushed to rotate around the second axis B relative to the rear leg frame 12, the supporting rod 13 is pushed to gradually close to the rear leg frame 12 when rotating, when the supporting rod 13 rotates, the supporting rod 13 drives one end of the linkage rod 14 to move, one end of the linkage rod 14 moves along with the supporting rod 13 and rotates around the fourth axis D relative to the supporting rod 13, the other end of the linkage rod 14 moves along with the movement and rotates around the third axis C relative to the front leg frame 11, at the moment, the other end of the linkage rod 14 pulls the front leg frame 11 to rotate around the first axis A relative to the rear leg frame 12 and close to the rear leg frame 12, and when the front leg frame 11 closes to the rear leg frame 12 and the supporting rod 13 closes to the rear leg frame 12, the whole child car frame is folded; the folding operation of the child car frame is convenient, the folding of the whole car can be completed only by pushing the stay bars 13 to close to the rear leg frames 12, the folding operation is simple, the folding structure is simple, and the child car frame is convenient for a adult to operate and fold.

As shown in fig. 2, the rear leg frame 12 includes a rear leg 122, a protruding connection seat 123 is connected to an upper end of the rear leg 122, a rear wheel 121 is connected to a lower end of the rear leg 122, the front leg frame 11 includes a front leg 112 rotatably connected to a front end of the connection seat 123 about a first axis a, a front wheel 111 is connected to a lower end of the front leg 112, and the stay 13 is rotatably connected to the connection seat 123 about a second axis B. The arrangement of the connecting base 123 allows sufficient space and distance for the front legs 112 and the front wheels 111 to rotate relative to the connecting base 123 without interfering with the rear legs 122 and to be brought into close engagement with the rear legs 122.

As shown in fig. 6, the rear leg 122 includes two left and right spaced second rear leg bars 1222 and third rear leg bars 1223, the connection base 123 includes left and right base bodies 1231 and 1232 connected to the top ends of the second and third rear leg bars 1222 and 1223, respectively, the rear wheel 121 is connected to the lower ends of the second and third rear leg bars 1222 and 1223, the front leg 112 includes second and third front leg bars 1123 and 1124 rotatably connected to the left and right base bodies 1231 and 1232 about a first axis a, the front wheel 111 is connected to the lower ends of the second and third front leg bars 1123 and 1124, and the stay 13 includes left and right rod bodies 131 and 132 rotatably connected to the left and right base bodies 1231 and 1232 about a second axis B. In this embodiment, the left and right side legs 1222 and 1223, the left and right seats 1231 and 1232, the second and third front legs 1123 and 1124, and the left and right rods 131 and 132 are symmetrically disposed, and when folding, the left and right rods 131 and 132 are operated to rotate.

As shown in fig. 7 to 9, the supporting rod 13 is connected with a push rod 3 capable of sliding therein, the locking structure comprises a locking assembly 2 arranged between a rear leg 122 and the supporting rod 13 and capable of locking the rear leg 122 and the supporting rod 13, the locking assembly 2 comprises a locking position 21 arranged on the rear leg 122, the supporting rod 13 is provided with a clamping lock 22 capable of sliding relative to the supporting rod to be separated from or clamped into the locking position 21, an elastic reset piece 23 capable of pushing the clamping lock 22 to reset is arranged between the clamping lock 22 and the supporting rod 13, a pushing block 24 capable of being pushed by the push rod 3 to separate the clamping lock 22 from the locking position 21 when the push rod 3 slides downwards along the supporting rod 13 is further arranged in the supporting rod 13, and a reset spring 25 capable of resetting the pushing block 24 is arranged between the pushing block 24 and the push rod 3. The push rod 3 and the stay rod 13 are also provided with locking parts, and the adopted locking parts are structures such as the existing bolt locks or lock bolts. When the locking assembly 2 needs to be unlocked, the locking between the push rod 3 and the supporting rod 13 is firstly released, then the push rod 3 is pushed to slide along the supporting rod 13, the pushing block 24 is pushed when the push rod 3 slides downwards, the locking piece 22 is pushed when the pushing block 24 slides, the locking piece 22 is gradually separated from the locking piece 21, at the moment, the supporting rod 13 and the rear leg 122 are unlocked, and the supporting rod 13 can rotate and fold relative to the rear leg 122.

As shown in fig. 7 to 9, the latch 22 includes a latch piece 221 disposed in the stay 13 and capable of sliding up and down along the stay 13, the latch piece 221 is provided with a latch protrusion 222 protruding outwards, the latch portion 21 is a latch groove disposed on the rear leg 122, and the rear leg 122 is further provided with a relief groove 1225 communicating with the latch groove and capable of releasing the latch protrusion 222 when the stay 13 rotates relative to the rear leg 122. When the top of the locking piece 221 is pushed by the push rod 3, the locking piece 221 slides downwards along the supporting rod 13, at this time, the locking protrusion 222 on the locking piece 221 is separated from the locking groove and enters into the relief groove 1225, and when the supporting rod 13 rotates relative to the rear leg 122, the locking protrusion 222 can rotate in the relief groove 1225.

As shown in fig. 1, the rear leg frame 12 is further provided with a protruding mounting portion 124, and the seat assembly 4 is connected to the mounting portion 124. The seat assembly 4 is detachably connected to the mounting portion 124.

As shown in fig. 10 to 11, the seat assembly 4 includes a mounting seat 41 capable of being connected to a mounting portion 124, the mounting seat 41 is connected with a seat portion 42, a handrail 43 capable of rotating relative to the seat portion 42 and the mounting seat 41 is connected between the seat portion 42 and the mounting seat 41, a backrest portion 44 capable of being unfolded or folded relative to the seat portion 42 is also connected to the seat portion 42, an adjusting assembly capable of adjusting an inclined angle between the backrest portion 44 and the seat portion 42 is arranged between the backrest portion 44 and the seat portion 42, and a locking assembly 45 capable of locking the three and capable of being unlocked when the backrest portion 44 is folded rotationally towards the seat portion 42 is arranged between the seat portion 42, the mounting seat 41 and the handrail 43. The adjusting component is a common bolt adjusting component. When the latch bolt adjusting assembly is unlocked, the back rest 44 can rotate relative to the seat 42 to move toward the seat 42, and during rotation of the back rest 44, the seat 42 unlocks the latch assembly 45 and the armrest 43 can move toward the seat 42.

As shown in fig. 10 to 11, the locking assembly 45 includes a left housing 451 disposed on the seat portion 42 and a right housing 452 disposed on the mounting seat 41, a cavity 453 is defined between the left housing 451 and the right housing 452, a spline 454 capable of sliding relative to the left housing 451 and the right housing 452 is disposed in the cavity 453, spline grooves 455 capable of being engaged with the spline grooves 455 are disposed on the left housing 451 and the right housing 452, an elastic member 456 capable of enabling the spline 454 to be engaged with the spline grooves 455 on the left housing 451 and the right housing 452 at the same time is disposed between the spline grooves 455 and the right housing 452, a locking position 457 is disposed on the armrest 43, an engagement projection 458 capable of being engaged into the locking position 457 when the spline grooves 455 are engaged with the spline grooves 455 on the right housing 452 is disposed on the spline 454, a pushing member 459 capable of being driven by the backrest 44 and the pushing spline grooves 455 on the left housing 451 is disposed between the backrest 44 and the seat portion 42, and the pushing member 459 capable of sliding relative to the backrest portion 42 is disposed on the backrest 44. When the locking assembly 45 needs to be unlocked, the adjusting assembly is unlocked first, then the backrest 44 is pushed to close to the seat 42, in the process of rotating and closing the backrest 44, the driving part 450 on the backrest 44 pushes the pushing part 459 to slide transversely, the pushing part 459 pushes the spline 454 to slide, the spline 454 is gradually separated from the spline groove 455 on the left housing 451, at this time, the engaging projection 458 on the spline 454 is also separated from the locking position 457 on the armrest 43, and the armrest 43 can rotate relative to the seat 42 to close to the seat 42.

As shown in fig. 10 to 11, the pushing member 459 includes a post 4591, the post 4591 is provided with a boss 4592 extending into the left housing 451, the driving portion 450 is a protrusion disposed along a circumference, the post 4591 is provided with a groove 4593 capable of accommodating the driving portion 450, the groove 4593 is provided with a first inclined sliding surface 45931, and the driving portion 450 is provided with a second inclined sliding surface 4501 capable of abutting against the first inclined sliding surface 45931 when rotating along with the backrest 44, so that the pushing member 459 slides. When the backrest 44 is in the deployed position, the drive 450 is received within the recess 4593 of the post 4591; when the backrest portion 44 is folded toward the seat portion 42, the driving portion 450 on the backrest portion 44 follows the rotation, and the second inclined surface 4501 on the driving portion 450 pushes the first inclined surface 45931 when the driving portion 450 rotates, so that the pushing member 459 slides laterally to push the spline 454.

As shown in fig. 10 to 11, the locking position 457 is a locking groove formed on the armrest 43, the locking projection 458 is locked in the locking groove, and pushing inclined surfaces 4581 capable of pushing against edges of the locking groove to separate the locking projection 458 from the locking groove are disposed on two sides of the locking projection 458. When the armrest 43 rotates, the edge of the locking groove of the armrest 43 abuts against the pushing ramp 4581 so that the armrest 43 is separated from the engagement projection 458.

Example 2: as shown in fig. 12, the difference between the present embodiment and the embodiment 1 is that the rear leg 122 includes two first rear leg bars 1221, the top parts of the two first rear leg bars 1221 are connected to the connection base 123, the rear wheel 121 is connected to the lower end of the first rear leg bars 1221, the front leg 112 includes a first front leg bar 1121 rotatably connected to the connection base 123, the lower end of the first front leg bar 1121 is connected to the fork 1122, and the front wheel 111 is connected to the fork 1122. In this embodiment, two first rear leg rods 1221, one connecting seat 123 and one first front leg rod 1121 are provided, so that the number of rod members is reduced, and the structure is more compact.

Claims (10)

1. A child car frame movable from an unfolded state to a folded state after unlocking a locking structure, characterized in that: including preceding leg frame (11), preceding leg frame (11) on rotate around first axis (A) and be connected with back leg frame (12), back leg frame (12) on rotate around second axis (B) and be connected with vaulting pole (13), vaulting pole (13) and preceding leg frame (11) between be equipped with can drive preceding leg frame (11) to gangbar (14) that back leg frame (12) closed when vaulting pole (12) rotate and draw close, gangbar (14) one end rotate around third axis (C) and be connected on preceding leg frame (11), gangbar (14) other end rotate around fourth axis (D) and be connected on vaulting pole (13), preceding leg frame (11) lower extreme be connected with front wheel (111), back leg frame (12) lower extreme be connected with rear wheel (121).

2. A child car frame according to claim 1, wherein: rear leg frame (12) include rear leg (122), rear leg (122) upper end be connected with convex connecting seat (123), rear leg (122) lower extreme be connected with rear wheel (121), preceding leg frame (11) including rotating around first axis (A) and being connected in preceding leg (112) of connecting seat (123) front end, preceding leg (112) lower extreme be connected with front wheel (111), vaulting pole (13) around second axis (B) rotate and be connected on connecting seat (123).

3. A child car frame according to claim 2, wherein: the rear leg (122) comprises two first rear leg rods (1221), the tops of the two first rear leg rods (1221) are connected to the connecting seat (123), the rear wheels (121) are connected to the lower ends of the first rear leg rods (1221), the front legs (112) comprise first front leg rods (1121) which are rotatably connected to the connecting seat (123), the lower ends of the first front leg rods (1121) are connected with wheel forks (1122), and the front wheels (111) are connected to the wheel forks (1122).

4. A child car frame according to claim 2, wherein: the rear leg (122) comprises a second rear leg rod (1222) and a third rear leg rod (1223) which are arranged at left and right intervals, the connecting seat (123) comprises a left seat body (1231) and a right seat body (1232) which are respectively connected to the top ends of the second rear leg rod (1222) and the third rear leg rod (1223), the rear wheel (121) is connected to the lower ends of the second rear leg rod (1222) and the third rear leg rod (1223), the front leg (112) comprises a second front leg rod (1123) and a third front leg rod (1124) which are rotatably connected to the left seat body (1231) and the right seat body (1232) around a first axis (A), the front wheel (111) is connected to the lower ends of the second front leg rod (1123) and the third front leg rod (1124), and the supporting rod (13) comprises a rod body (131) which is rotatably connected to the left seat body (1231) and the right seat body (1232) around a second axis (B).

5. A child car frame according to claim 2 or 3 or 4, wherein: the utility model provides a push rod (3) that can slide in it on vaulting pole (13), locking structure including locating between rear leg (122) and vaulting pole (13) and can be with locking subassembly (2) of two locking, locking subassembly (2) including locating locking position (21) on rear leg (122), vaulting pole (13) on be equipped with can slide relatively and break away from or block latch (22) in locking position (21), latch (22) and vaulting pole (13) between be equipped with elasticity reset piece (23) that can push away latch (22) and reset, vaulting pole (13) in still be equipped with and can be pushed by push rod (3) and make latch (22) break away from pushing block (24) of locking position (21) when push rod (3) slide down, pushing block (24) and push rod (3) between be equipped with reset spring (25) that can make push block (24) reset.

6. The child car frame according to claim 5, wherein: the locking piece (22) comprises a locking piece (221) which is arranged in the supporting rod (13) and can slide up and down along the supporting rod (13), the locking piece (221) is provided with a locking bulge (222) which protrudes outwards, the locking position (21) is a locking groove which is arranged on the rear leg (122), and the rear leg (122) is also provided with a yielding groove (1225) which is communicated with the locking groove and can yield for the locking bulge (222) when the supporting rod (13) rotates relative to the rear leg (122).

7. A child car frame according to claim 1, wherein: the utility model provides a rear leg frame (12) on still be equipped with convex installation department (124), installation department (124) on be connected with seat subassembly (4), seat subassembly (4) including connecting mount pad (41) on installation department (124), mount pad (41) on be connected with seat portion (42), seat portion (42) and mount pad (41) between be connected with can relative two pivoted handrail (43), seat portion (42) on still be connected with can rotate relative it and expand or folding back portion (44), back portion (44) and seat portion (42) between be equipped with the regulation subassembly that can adjust the inclination contained angle between the two, seat portion (42), mount pad (41) and handrail (43) between be equipped with locking three and can be unlocked locking subassembly (45) when back portion (44) rotate folding to seat portion (42).

8. The child car frame according to claim 7, wherein: the locking assembly (45) comprises a left shell (451) arranged on the seat part (42) and a right shell (452) arranged on the mounting seat (41), a cavity (453) is formed between the left shell (451) and the right shell (452), a spline (454) capable of sliding relative to the left shell (451) is arranged in the cavity (453), spline grooves (455) capable of being clamped with the spline grooves (455) are formed in the left shell (451) and the right shell (452), an elastic piece (456) capable of enabling the spline (454) to be clamped with the spline grooves (455) on the left shell (451) and the right shell (452) at the same time is arranged between the spline grooves (455) and the right shell (452), a locking position (457) is formed in the handrail (43), a clamping lug (458) capable of being clamped into the locking position (457) when the spline grooves (455) on the handrail (454) are clamped with the right shell (452) is arranged on the spline grooves (454), the pushing piece (45) can be separated from the pushing piece (45) on the seat part (44) by the pushing piece (45), the backrest part (44) is also provided with a driving part (450) which can push the pushing piece (459) to slide when the backrest part is folded relative to the seat part (42).

9. The child car frame according to claim 8, wherein: the pushing part (459) comprises a column body (4591), the column body (4591) is provided with a convex column (4592) which stretches into the left shell (451), the driving part (450) is a bulge which is arranged along the circumference, the column body (4591) is provided with a groove (4593) which can accommodate the driving part (450), the groove (4593) is provided with a first inclined sliding surface (45931), and the driving part (450) is provided with a second inclined sliding surface (4501) which can be propped against the first inclined sliding surface (45931) to enable the pushing part (459) to slide when the driving part (450) rotates along with the backrest part (44).

10. The child car frame according to claim 8, wherein: the locking position (457) is a locking groove arranged on the handrail (43), the clamping convex blocks (458) are clamped in the locking groove, and pushing inclined planes (4581) which can be propped against the edges of the locking groove to enable the clamping convex blocks (458) to be separated from the locking groove are arranged on two sides of the clamping convex blocks (458).