Stroller framework

Abstract

The stroller framework comprises a front supporting rod, a rear supporting rod, a supporting rod and a hand push rod which are made of carbon fiber materials, the upper end of the front supporting rod is connected with a front connecting base, the lower end of the front supporting rod is connected with a front wheel frame, and the upper end of the rear supporting rod is connected with a rear connecting base which is rotatably connected with the front connecting base. The lower end of the supporting rod is connected with a lower connecting base rotationally connected with the rear connecting base, the upper end of the supporting rod is connected with an upper connecting base, the lower end of the hand push rod is connected with a push rod connecting base, and the middle of the push rod connecting base is rotationally connected with the upper connecting base. The first transmission rod is rotatably connected with the rear connecting base, a second transmission rod is hinged between the lower end of the first transmission rod and the front wheel frame, a rotating sleeve is rotatably connected to the middle of the supporting rod, a sliding grab bar is arranged in the rotating sleeve, the rear end of the grab bar is rotatably connected with the first transmission rod, and a U-shaped handrail is connected to the front end of the grab bar. The folding chair is light in weight and small in size after being folded.

Description

[Technical field]

[0001] The utility model relates to a child stroller frame. [Background technology]

[0002] Strollers are common products for infants and young children during their growth. Today's strollers can generally be unfolded or folded. In the unfolded state, they are for children to ride and travel, while in the folded state, they are easy to store or carry. The frame structures of strollers on the market are different and varied. Many strollers are still large and heavy after being folded, which makes them inconvenient to carry and takes up a lot of space when stored.

[0003] Therefore, the present invention is just produced based on the above shortcomings. [Utility Model Content]

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a child stroller frame which is light in weight and small in size after being folded.

[0005] The utility model is realized by the following technical solutions:

[0006] A child stroller frame can be moved from an unfolded position to a folded position after a locking device is unlocked, comprising a front support rod, a rear support rod, a support rod and a hand push rod made of carbon fiber material, the upper end of the front support rod is connected to a front connecting seat, the lower end of the front support rod is connected to a front wheel frame, the front wheel frame is connected to a front wheel, the upper end of the rear support rod is connected to a rear connecting seat rotatably connected to the front connecting seat around a first axis, the lower end of the rear support rod is connected to the rear wheel frame, the rear wheel frame is connected to a rear wheel, the lower end of the support rod is connected to a lower connecting seat rotatably connected to the rear connecting seat around a second axis, the upper end of the support rod is connected to the upper connecting seat, and the hand push rod The lower end is connected to a push rod connecting seat, the middle position of the push rod connecting seat is rotatably connected to the upper connecting seat around a third axis, the lower end of the push rod connecting seat is rotatably connected to a first transmission rod around a fourth axis, the first transmission rod is rotatably connected to the rear connecting seat around a fifth axis near its lower end, a second transmission rod is hingedly provided between the lower end of the first transmission rod and the front wheel frame, the middle portion of the support rod is rotatably connected to a rotating sleeve around a sixth axis, a handrail rod that can slide therein is provided in the rotating sleeve, the rear end of the handrail rod is rotatably connected to the first transmission rod around a seventh axis, and the front end of the handrail rod is detachably connected to a U-shaped handrail handle.

[0007] The lower connecting seat is also rotatably connected with a rotating seat around an eighth axis. A seat rod capable of sliding therein is arranged in the rotating seat. The rear end of the seat rod is rotatably connected with the first transmission rod around a ninth axis.

[0008] The rotating seat comprises a seat body rotatably connected to the lower connecting seat, the seat body is provided with a protrusion protruding inwardly, the protrusion is provided with a channel for the seat rod to slide inside, and the seat body is also provided with a mounting hole for mounting a flexible seat cushion.

[0009] The rotating sleeve includes a first rotating body rotatably connected to the support rod, and the rear end of the first rotating body is provided with a second rotating body integrally formed with the first rotating body and protruding upward, and the second rotating body is provided with a through hole for the handrail rod to slide inside, and when the child stroller frame is in the unfolded state, the lower side of the handrail rod bears on the wall of the through hole and the upper surface of the first rotating body.

[0010] The front part of the seat rod is also connected to a leg support frame, and the leg support frame includes a front support rod that can rotate relative to the seat rod, and a rotating rod that can rotate relative to the front support rod is provided on the back side of the front support rod, and a positioning structure that can position the leg support frame is provided between the rotating rod and the seat rod, and the positioning structure includes a first positioning protrusion and a second positioning protrusion provided at the front end of the seat rod, and a locking block that can engage with or disengage from the first positioning protrusion and the second positioning protrusion when the rotating rod rotates relative to the front support rod is provided on the rotating rod, and a resetting element that can push the rotating rod to rotate and reset is provided between the rotating rod and the front support rod, and a cloth cover that can support the legs is provided on the leg support frame.

[0011] A U-shaped hand push handle is provided at the upper end of the hand push rod, the locking device is arranged between the push rod connecting seat and the upper connecting seat, and an unlocking component capable of controlling the unlocking of the locking device is provided in the middle of the hand push handle.

[0012] The locking device includes a first connecting shell arranged on the push rod connecting seat and a second connecting shell arranged on the upper connecting seat. The first connecting shell and the second connecting shell are provided with a plurality of locking grooves in a circumferential direction. A spline which can move laterally therein and can engage with the locking grooves on the first connecting shell and the second connecting shell at the same time is provided in the space enclosed by the first connecting shell and the second connecting shell. A movable part which can rotate and push the spline to disengage from the locking groove on the first connecting shell when rotating is provided between the spline and the first connecting shell. The unlocking assembly is connected to the movable part. A reset spring which can push the spline to move laterally and reset is also provided between the spline and the first connecting shell.

[0013] The movable part includes a main body, on which a plurality of inclined grooves with inclined groove walls are arranged along the circumferential direction, and the first connecting shell is provided with a plurality of inclined protrusions which match the inclined grooves and can push the inclined groove walls of the inclined grooves when the main body rotates to make the main body push spline move laterally.

[0014] The unlocking assembly comprises a fixed shell arranged on the hand pushing handle, the fixed shell is provided with an operating block exposed and capable of sliding relative to the fixed shell, the fixed shell is also provided with a sliding block which can be pushed by the operating block to slide horizontally when the operating block slides inwardly relative to the fixed shell, the sliding block is provided with a first inclined surface, the operating block is provided with a second inclined surface which can push the first inclined surface when it slides in the fixed shell, and a pull rope connecting the two is provided between the sliding block and the main body, the fixed shell is also provided with a first spring which can push the operating block to slide back, the operating block is provided with a square groove and a yield groove which is connected to the square groove and has a width smaller than the width of the square groove, the fixed shell is also provided with a second lock button which can slide relative to it, the second lock button comprises a blocking block which can cooperate with the square groove to prevent the operating block from sliding relative to the fixed shell, the blocking block is connected with a button rod exposed to the fixed shell and can move relatively in the yield groove after the blocking block is separated from the square groove, and the fixed shell is also provided with a second spring which can push the second lock button to reset.

[0015] A backrest is rotatably connected to the rotating seat.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. When the utility model is folded, the locking device is first unlocked, and then the hand push rod is pushed forward and pressed down, and the push rod connecting seat pushes the upper end of the first transmission rod and the upper connecting seat downward, so that the first transmission rod and the support rod rotate relative to the rear connecting seat and rotate close to the rear support rod, and the lower end of the first transmission rod tilts upward during the rotation process and pulls the second transmission rod, and the second transmission rod pulls the front support rod to rotate close to the rear support rod. In this process, the rotating first transmission rod pulls the rear end of the handrail rod and rotates relatively with it, and the handrail rod slides backward in the rotating sleeve, and the handrail handle moves to the rear side, so that the handrail handle does not extend too long forward after the child stroller frame is folded, ensuring that the child stroller frame is small in size after folding, easy to carry or store, and the factory packaging volume is also small, reducing costs. In addition, the front support rod, the rear support rod, the support rod and the hand push rod are all made of carbon fiber material, which ensures that the child stroller frame has sufficient strength and is light in weight and more convenient to carry.

[0018] 2. When the utility model is folded, the first transmission rod pulls the rear end of the seat rod and rotates relatively therewith, and the seat rod slides backward in the rotating seat, so that the seat rod does not extend too long forward after the child stroller frame is folded, ensuring that the child stroller frame is small in size after folding, which is easy to carry or store.

[0019] 3. When the frame of the child stroller of the utility model is in the unfolded state, the lower side of the handrail rod bears against the through hole wall of the second rotating body and the upper surface of the first rotating body, with a large bearing area and a good supporting effect, so that the child can hold the handrail more steadily and safely.

Brief Description of the Drawings

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 It is a side view of the utility model in the unfolded state;

[0022] Figure 3 This is one of the side views of the utility model during the folding process;

[0023] Figure 4 This is the second side view of the utility model during the folding process;

[0024] Figure 5 It is a side view of the utility model in a folded state;

[0025] Figure 6 It is a cross-sectional view of the utility model;

[0026] Figure 7 It is one of the three-dimensional diagrams of the components of the utility model;

[0027] Figure 8 This is the second stereogram of the components of the utility model;

[0028] Fig. 9 It is one of the exploded views of the components of the utility model;

[0029] Fig.10 This is the second exploded view of the components of the utility model;

[0030] Fig.11 This is the third exploded view of the components of the utility model;

[0031] Fig.12 It is the third stereogram of the components of the utility model;

[0032] Fig.13 It is a three-dimensional diagram of the rotating sleeve of the utility model;

[0033] Fig.14 yes Figure 6 Magnified view at K in the middle. [Specific implementation method]

[0034] The utility model is further described below in conjunction with the accompanying drawings:

[0035] like Figures 1 to 6As shown, a child stroller frame can be moved from an unfolded position to a folded position after a locking device is unlocked, comprising a front support rod 1, a rear support rod 2, a support rod 3 and a hand push rod 4 made of carbon fiber material, wherein the upper end of the front support rod 1 is connected to a front connecting seat 11, the lower end of the front support rod 1 is connected to a front wheel frame 12, and the front wheel frame 12 is connected to a front wheel 13, the upper end of the rear support rod 2 is connected to a rear connecting seat 21 rotatably connected to the front connecting seat 11 around a first axis A, the lower end of the rear support rod 2 is connected to a rear wheel frame 22, and the rear wheel frame 22 is connected to a rear wheel 23, the lower end of the support rod 3 is connected to a lower connecting seat 31 rotatably connected to the rear connecting seat 21 around a second axis B, the upper end of the support rod 3 is connected to an upper connecting seat 32, and the hand push rod 4 The lower end is connected to a push rod connecting seat 41, and the middle position of the push rod connecting seat 41 is rotatably connected to the upper connecting seat 32 around the third axis C. The lower end of the push rod connecting seat 41 is rotatably connected to the first transmission rod 51 around the fourth axis D. The first transmission rod 51 is rotatably connected to the rear connecting seat 21 around the fifth axis E near its lower end. A second transmission rod 52 is hinged between the lower end of the first transmission rod 51 and the front wheel frame 12. The middle part of the support rod 3 is rotatably connected to a rotating sleeve 61 around the sixth axis F. A handrail rod 62 that can slide therein is provided in the rotating sleeve 61, and the rear end of the handrail rod 62 is rotatably connected to the first transmission rod 51 around the seventh axis G. The front end of the handrail rod 62 is detachably connected to a U-shaped handrail handle 63. When folding, first unlock the locking device, then push the hand push rod 4 forward and press it down, the push rod connecting seat 41 pushes the upper end of the first transmission rod 51 and the upper connecting seat 32 downward, so that the first transmission rod 51 and the support rod 3 rotate relative to the rear connecting seat 21 and rotate close to the rear support rod 2, and the lower end of the first transmission rod 51 tilts upward during the rotation process and pulls the second transmission rod 52, and the second transmission rod 52 pulls the front support rod 1 to rotate close to the rear support rod 2, in this process, the rotating first transmission rod 51 pulls the rear end of the handrail rod 62 and rotates relative to it, the handrail rod 62 slides backward in the rotating sleeve 61, and the handrail handle 63 moves to the rear side, so that the handrail handle 63 does not extend too long forward after the child stroller frame is folded, ensuring that the child stroller frame is small in size after folding, and is easy to carry or store. In addition, the front support rod 1, the rear support rod 23, the support rod and the hand push rod 4 are all made of carbon fiber material, which makes the child stroller frame light in weight and more easy to carry while ensuring sufficient strength.

[0036] like Figures 1 to 6As shown, the lower connecting seat 31 is also rotatably connected with a rotating seat 71 around the eighth axis H, and the rotating seat 71 is provided with a seat rod 72 that can slide therein, and the rear end of the seat rod 72 is rotatably connected with the first transmission rod 51 around the ninth axis I. When folding, the first transmission rod 51 pulls the rear end of the seat rod 72 and rotates relative to it, and the seat rod 72 slides backward in the rotating seat 71, so that the seat rod 72 will not extend too long forward after the child stroller frame is folded, ensuring that the child stroller frame is small in size after folding, which is convenient for carrying or storage. The rotating seat 71 can also be rotatably connected with a backrest (not shown in the figure), and when the child stroller frame is folded, the seat rod 72 slides backward, which is equivalent to the lower end of the backrest and the rotating seat 71 moving forward relative to the seat rod 72. When the backrest is rotated backward and folded, the backrest can be moved close to the rear support rod 2, so that the child stroller frame with the backrest is also small in size after folding.

[0037] like Fig.12 As shown, the rotating seat 71 includes a seat body 711 rotatably connected to the lower connecting seat 31, the seat body 711 is provided with a protruding portion 712 protruding toward the inner side thereof, the protruding portion 712 is provided with a channel 714 for the seat rod 72 to slide inside, and the seat body 711 is also provided with a mounting hole 713 for mounting a flexible seat cushion. The seat cushion of the stroller is fixed to the seat rod 72 by a belt passing through the mounting hole 713, which is convenient for the seat cushion to be installed and is firm.

[0038] like Fig.12 as well as Fig.13 As shown, the rotating sleeve 61 includes a first rotating body 611 rotatably connected to the support rod 3, and the rear end of the first rotating body 611 is provided with a second rotating body 612 which is integrally formed therewith and protrudes upward, and the second rotating body 612 is provided with a through hole 613 for the handrail rod 62 to slide inside, and when the child stroller frame is in the unfolded state, the lower side of the handrail rod 62 bears on the wall of the through hole 613 and the upper surface 611a of the first rotating body 611, so that the bearing area is large and the supporting effect is good, and the child can hold the handrail handle 63 more stably and safely.

[0039] like Figure 1 , Figure 6 and Fig.14As shown, the front part of the seat rod 72 is also connected to a leg support frame 73, and the leg support frame 73 includes a front support rod 731 that can rotate relative to the seat rod 72, and a rotating rod 732 that can rotate relative to the front support rod 731 is provided on the back side of the front support rod 731, and a positioning structure that can position the leg support frame 73 is provided between the rotating rod 732 and the seat rod 72, and the positioning structure includes a first positioning protrusion 741 and a second positioning protrusion 742 provided at the front end of the seat rod 72, and a locking block 743 is provided on the rotating rod 732, which can engage with or disengage from the first positioning protrusion 741 and the second positioning protrusion 742 when the rotating rod 732 rotates relative to the front support rod 731, and a reset element 744 that can push the rotating rod 732 to rotate and reset is provided between the rotating rod 732 and the front support rod 731, and a cloth cover that can support the legs is provided on the leg support frame 73. When the locking block 743 cooperates with the second positioning protrusion 742, the leg support frame 73 is in an inclined state. When a child sits, the legs can lean on the cloth cover on the leg support frame 73, making the child sit comfortably. When the locking block 743 cooperates with the first positioning block 741, the leg support frame 73 is roughly flush with the seat rod 72, which can extend the front and rear length of the seat rod 72, and the child can lie flat in the child stroller to sleep. When changing the position of the leg support frame 73, just pinch the rotating rod 732 to rotate it to disengage the locking block 743 from the first positioning block 741 or the second positioning block 742, and then rotate the front support rod 731 to the desired position and release the rotating rod 732.

[0040] like Figure 1 and Figure 7 As shown, a U-shaped handle 42 is provided at the upper end of the push rod 4 for easy holding and pushing, and the locking device is arranged between the push rod connecting seat 41 and the upper connecting seat 32. An unlocking component 8 capable of controlling the unlocking of the locking device is provided in the middle of the push handle 42.

[0041] like Figures 7 to 11As shown, the locking device includes a first connecting shell 101 arranged on the push rod connecting seat 41 and a second connecting shell 102 arranged on the upper connecting seat 32, and a plurality of locking grooves 103 are arranged on the first connecting shell 101 and the second connecting shell 102 in a circumferential direction. A spline 104 which can move laterally therein and can simultaneously engage with the locking grooves 103 on the first connecting shell 101 and the second connecting shell 102 is arranged in the space enclosed by the first connecting shell 101 and the second connecting shell 102, and a movable part 105 which can rotate and push the spline 104 to disengage from the locking groove 103 on the first connecting shell 102 when rotating is arranged between the spline 104 and the first connecting shell 101, and the unlocking component 8 is connected to the movable part 105, and a reset spring 108 which can push the spline 104 to move laterally and reset is also arranged between the spline 104 and the first connecting shell 101. When the unlocking assembly 8 drives the movable member 105 to rotate, the movable member 105 pushes the spline 104 to disengage from the locking groove 103 on the first connecting shell 101. At this time, the return spring 108 is compressed, and the push rod 4 can be rotated and pressed down to complete the folding of the child stroller.

[0042] like Figures 8 to 11 As shown, the movable member 105 includes a body 1051, and a plurality of inclined grooves 107 with inclined groove walls are provided on the body 1051 along the circumferential direction, and a plurality of inclined protrusions 106 are provided on the first connection housing 101, which match the inclined grooves 107 and can push the inclined groove walls of the inclined grooves 107 when the body 1051 rotates, so that the body 1051 pushes the spline 104 to move horizontally. When the unlocking assembly 8 drives the body 1051 to rotate, the groove walls of the inclined grooves 107 on the body 1051 cooperate with the inclined protrusions 106, and the inclined protrusions 106 push the rotating body 1051 to move horizontally, and the body 1051 pushes the spline 104 to disengage from the locking groove 103 on the first connection housing 101, thereby achieving unlocking.

[0043] like Figures 7 to 11As shown, the unlocking assembly 8 includes a fixed shell 81 arranged on the hand push handle 42, the fixed shell 81 includes a front shell 811 and a rear shell 812 connected to the front shell 811 and clamping the hand push handle 42, the fixed shell 81 is provided with an operating block 82 exposed and slidable relative to it, the fixed shell 81 is also provided with a sliding block 83 that can be pushed by the operating block 82 and slide horizontally when the operating block 82 slides inward relative to it, the sliding block 83 is provided with a first inclined surface 84, the operating block 82 is provided with a second inclined surface 85 that can push the first inclined surface 84 when it slides into the fixed shell 81, a pull rope 86 connecting the sliding block 83 and the body 1051 is provided between the sliding block 83 and the body 1051, and the fixed shell 8 1 is also provided with a first spring 87 that can push the operating block 82 to slide and return to its original position. The operating block 82 is provided with a square groove 821 and a clearance groove 822 that is connected to the square groove 821 and has a width smaller than the square groove 821. The fixed shell 81 is also provided with a second lock button 88 that can slide relative to it. The second lock button 88 includes a blocking block 881 that can cooperate with the square groove 821 to prevent the operating block 82 from sliding relative to the fixed shell 81. The blocking block 881 is connected to a button rod 882 that is exposed to the fixed shell 81 and can move relatively in the clearance groove 822 after the blocking block 881 is separated from the square groove 821. The fixed shell 81 is also provided with a second spring 89 that can push the second lock button 88 to return to its original position. When the stroller needs to be folded, the button rod 882 is pressed first to make the blocking block 881 withdraw from the square groove 821. Once the blocking block 881 withdraws from the square groove 821, the square groove 821 and the give way groove 822 are aligned with the button rod 882, and the blocking block 881 no longer blocks the sliding movement of the operating block 82. At this time, the user can pinch the operating block 82 to slide into the fixed shell 81, and the second inclined surface 85 on the operating block 82 pushes the first inclined surface 84 on the sliding block 83, so that the sliding block 83 slides horizontally, and the sliding block 83 pulls the main body 1051 to rotate through the pull rope 86, thereby disengaging the spline 104 from the locking groove 103 on the first connecting shell 101, thereby achieving unlocking. Therefore, during the unlocking operation, the thumb can first press the button rod 882, and then the other four fingers can hold the operating block 82 to slide the operating block 82 into the fixed shell 81 to achieve unlocking. The unlocking operation of one press and one hold can be achieved with one hand, making the unlocking operation of the child stroller simple, fast and safe, and can prevent misoperation of the operating block 82 from causing mislocking.

[0044] The embodiment is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the present purpose.

Claims

1. A child stroller frame, which can be moved from an unfolded position to a folded position after a locking device is unlocked, characterized in that: The invention comprises a front support rod (1), a rear support rod (2), a support rod (3) and a push rod (4) made of carbon fiber material, wherein the upper end of the front support rod (1) is connected to a front connecting seat (11), the lower end of the front support rod (1) is connected to a front wheel frame (12), the front wheel frame (12) is connected to a front wheel (13), the upper end of the rear support rod (2) is connected to a rear connecting seat (21) rotatably connected to the front connecting seat (11) around a first axis (A), the lower end of the rear support rod (2) is connected to a rear wheel frame (22), the rear wheel frame (22) is connected to a rear wheel (23), the lower end of the support rod (3) is connected to a lower connecting seat (31) rotatably connected to the rear connecting seat (21) around a second axis (B), the upper end of the support rod (3) is connected to an upper connecting seat (32), and the lower end of the push rod (4) is connected to a push rod connecting seat (41), The middle part of the push rod connecting seat (41) is rotatably connected to the upper connecting seat (32) around a third axis (C), the lower end of the push rod connecting seat (41) is rotatably connected to a first transmission rod (51) around a fourth axis (D), the first transmission rod (51) is rotatably connected to the rear connecting seat (21) around a fifth axis (E) near its lower end, a second transmission rod (52) is provided between the lower end of the first transmission rod (51) and the front wheel frame (12) and is hinged to the two, the middle part of the support rod (3) is rotatably connected to a rotating sleeve (61) around a sixth axis (F), a handrail rod (62) that can slide therein is provided in the rotating sleeve (61), the rear end of the handrail rod (62) is rotatably connected to the first transmission rod (51) around a seventh axis (G), and the front end of the handrail rod (62) is detachably connected to a U-shaped handrail handle (63).

2. The child stroller frame according to claim 1, characterized in that: The lower connecting seat (31) is also rotatably connected to a rotating seat (71) around an eighth axis (H), and a seat rod (72) capable of sliding therein is provided in the rotating seat (71), and a rear end of the seat rod (72) is rotatably connected to the first transmission rod (51) around a ninth axis (I).

3. The child stroller frame according to claim 2, characterized in that: The rotating seat (71) comprises a seat body (711) rotatably connected to the lower connecting seat (31); the seat body (711) is provided with a protruding portion (712) protruding inwardly thereof; the protruding portion (712) is provided with a channel for the seat rod (72) to slide inside; and the seat body (711) is also provided with a mounting hole (713) for mounting a flexible seat cushion.

4. The child stroller frame according to claim 1, characterized in that: The rotating sleeve (61) comprises a first rotating body (611) rotatably connected to the support rod (3); a second rotating body (612) is provided at the rear end of the first rotating body (611) and is integrally formed with the first rotating body and protrudes upward; a through hole (613) is provided on the second rotating body (612) for the handrail rod (62) to slide inside; and when the frame of the child stroller is in an unfolded state, the lower side of the handrail rod (62) bears against the hole wall of the through hole (613) and the upper surface (611a) of the first rotating body (611).

5. The stroller frame according to claim 2, characterized in that: The front part of the seat rod (72) is also connected to a leg support frame (73), and the leg support frame (73) includes a front support rod (731) that can rotate relative to the seat rod (72), and a rotating rod (732) that can rotate relative to the front support rod (731) is provided on the back side of the front support rod (731), and a positioning structure that can position the leg support frame (73) is provided between the rotating rod (732) and the seat rod (72), and the positioning structure includes a first positioning protrusion provided at the front end of the seat rod (72). (741) and a second positioning protrusion (742), the rotating rod (732) is provided with a locking block (743) which can engage with or disengage with the first positioning protrusion (741) and the second positioning protrusion (742) when the rotating rod (732) rotates relative to the front support rod (731), a reset element (744) which can push the rotating rod (732) to rotate and reset is provided between the rotating rod (732) and the front support rod (731), and a cloth cover which can support the legs is provided on the leg support frame (73).

6. The child stroller frame according to claim 1, characterized in that: A U-shaped push handle (42) is provided at the upper end of the push rod (4), the locking device is arranged between the push rod connecting seat (41) and the upper connecting seat (32), and an unlocking component (8) capable of controlling the unlocking of the locking device is provided in the middle of the push handle (42).

7. The child stroller frame according to claim 6, characterized in that: The locking device comprises a first connecting shell (101) arranged on the push rod connecting seat (41) and a second connecting shell (102) arranged on the upper connecting seat (32), wherein the first connecting shell (101) and the second connecting shell (102) are provided with a plurality of locking grooves (103) along the circumferential direction, and a locking member (103) which can move laterally therein and can be engaged with the first connecting shell (101) and the second connecting shell (102) is provided in the space enclosed by the first connecting shell (101) and the second connecting shell (102). A spline (104) is simultaneously engaged with the fixed groove (103); a movable part (105) is provided between the spline (104) and the first connecting shell (101) and can rotate and push the spline (104) to disengage from the locking groove (103) on the first connecting shell (101) when rotating; the unlocking component (8) is connected to the movable part (105); and a return spring (108) is also provided between the spline (104) and the first connecting shell (101) and can push the spline (104) to move horizontally and return to its original position.

8. The child stroller frame according to claim 7, characterized in that: The movable part (105) comprises a main body (1051), on which a plurality of inclined grooves (107) with inclined groove walls are arranged along a circumferential direction, and on the first connecting shell (101) a plurality of inclined protrusions (106) are arranged which match the inclined grooves (107) and can push the inclined groove walls of the inclined grooves (107) when the main body (1051) rotates, thereby causing the main body (1051) to push the spline (104) to move laterally.

9. The child stroller frame according to claim 8, characterized in that: The unlocking assembly (8) comprises a fixed shell (81) arranged on the hand push handle (42), an operating block (82) which is exposed and can slide relative to the fixed shell (81) is arranged inside the fixed shell (81), a sliding block (83) which can be pushed by the operating block (82) and slide horizontally when the operating block (82) slides inward relative to the fixed shell (81), a first inclined surface (84) is arranged on the sliding block (83), a second inclined surface (85) which can push the first inclined surface (84) when the operating block (82) slides into the fixed shell (81), a pull rope (86) connecting the sliding block (83) and the main body (1051) is arranged between the sliding block (83) and the main body (1051), and a first spring which can push the operating block (82) to slide back is arranged inside the fixed shell (81). (87), the operating block (82) is provided with a square groove (821) and a clearance groove (822) which is connected to the square groove (821) and has a width smaller than the square groove (821), and the fixed shell (81) is also provided with a second lock button (88) which can slide relative to the fixed shell (81), and the second lock button (88) includes a blocking block (881) which can cooperate with the square groove (821) to prevent the operating block (82) from sliding relative to the fixed shell (81), and the blocking block (881) is connected with a button rod (882) which is exposed outside the fixed shell (81) and can move relatively in the clearance groove (822) after the blocking block (881) is separated from the square groove (821), and the fixed shell (81) is also provided with a second spring (89) which can push the second lock button (88) to return to its original position.

10. The child stroller frame according to claim 2, characterized in that: A backrest is rotatably connected to the rotating seat (71).

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