Stroller framework

Abstract

The invention discloses a stroller framework which comprises a bottom supporting frame, the bottom supporting frame comprises front legs and rear legs rotatably connected with the front legs around a first axis, wheels are arranged at the lower ends of the front legs and the lower ends of the rear legs, and a seat supporting piece is movably connected to the bottom supporting frame. The seat supporting piece is connected with a sliding part capable of sliding along the front legs, the bottom supporting frame is further rotatably connected with a push rod assembly around a second axis, and a transmission piece capable of driving the seat supporting piece to slide relative to the front legs when the push rod assembly rotates and gets close to the bottom supporting frame is arranged between the push rod assembly and the seat supporting piece. When the stroller framework is in a folded state, the seat supporting piece slides to be close to the front legs, and the push rod assembly and the front legs are close to the rear legs. The folding chair is simple in structure, convenient to fold and operate and small in size after being folded.

Description

[Technical field]

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

[0002] Strollers are common products for children during their growth process. They can generally be unfolded or folded. When unfolded, they can be used by children for travel, and when folded, they can be easily carried or stored.

[0003] The structure of the child stroller frame is related to the convenience of the folding operation of the child stroller and the compactness of the folded volume. The child stroller frames currently on the market have various connecting rod structures and different folding action principles. The present invention provides a new child stroller frame that is different from the existing child stroller frames. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a child stroller frame which has a simple structure, is easy to fold and has a small volume after folding.

[0005] The present invention is achieved through 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 bottom support frame, the bottom support frame comprising front legs and rear legs rotatably connected to the front legs around a first axis, wheels are provided at the lower ends of the front legs and the rear legs, a seat support is movably connected to the bottom support frame, a sliding portion that can slide along the front legs is connected to the seat support, and a push rod assembly is also rotatably connected to the bottom support frame around a second axis, a transmission member is provided between the push rod assembly and the seat support member, which can drive the seat support member to slide relative to the front legs when the push rod assembly is rotated toward the bottom support frame, and when the child stroller frame is in a folded state, the seat support member slides close to the front legs, and the push rod assembly and the front legs are close to the rear legs.

[0007] The seat support is also provided with a protrusion, and the protrusion is rotatably connected to the rear leg around a third axis.

[0008] The transmission member comprises a transmission plate, the upper end of which is rotatably connected to the push rod assembly around a fourth axis, and the lower end of which is rotatably connected to the seat support member around a fifth axis.

[0009] When the child stroller frame is in a folded state, the seat support is stored at the inner side of the front legs.

[0010] The stroller frame also includes a front armrest assembly, which includes a U-shaped armrest rod. The two ends of the U-shaped armrest rod are rotatably connected to the bottom support frame around a sixth axis. A traction member is also provided between the U-shaped armrest rod and the seat support, which can pull the U-shaped armrest rod closer to the front leg when the seat support slides relative to the front leg.

[0011] The traction member comprises a traction plate, the upper end of which is rotatably connected to the U-shaped handrail rod, and the lower end of which is rotatably connected to the seat support member.

[0012] The U-shaped handrail rod, front leg, rear leg and push rod assembly are coaxially rotatably connected.

[0013] The upper end of the front leg is provided with a front connecting seat, the upper end of the rear leg is fixed to the rear connecting seat, the push rod assembly includes a lower push rod and an upper push rod rotatably connected to the lower push rod, the lower end of the lower push rod is fixed to the push rod connecting seat, and the push rod connecting seat, the front connecting seat and the rear connecting seat are coaxially rotatably connected, the front connecting seat is arranged between the rear connecting seat and the push rod connecting seat, and the locking device includes a first locking assembly arranged between the front connecting seat and the push rod connecting seat, a second locking assembly is arranged between the upper push rod and the lower push rod, and an unlocking switch for unlocking the second locking assembly is arranged on the upper push rod for unlocking the second locking assembly, an unlocking assembly is arranged between the second locking assembly and the first locking assembly, and the upper push rod is capable of driving the first locking assembly to unlock when the upper push rod is rotated and folded relative to the lower push rod, and at least two arc grooves are arranged on the rear connecting seat along the circumferential direction, and a guide block is provided on the front connecting seat that penetrates into the arc groove and can slide therein.

[0014] The push rod assembly includes a lower push rod and an upper push rod connected to the lower push rod, a backrest that can rotate relative to the seat support is provided at the rear end of the seat support, a locking assembly is provided between the backrest and the seat support, the seat support is provided with a pushing portion that can keep the locking assembly in an unlocked state when the backrest is in a set position, and the upper push rod is provided with a pushing rod that can press the backrest when the push rod assembly is rotated and folded relative to the bottom support frame, so that the unlocked backrest rotates close to the rear legs.

[0015] The front legs are provided with strip grooves, the sliding part is a sliding column arranged on the seat support, and the sliding column is inserted into the strip groove and can slide inside.

[0016] The sliding part is a sliding sleeve rotatably connected to the seat support, and the sliding sleeve is arranged on the front leg and can slide along the front leg; or, the sliding part is a sliding seat rotatably connected to the seat support, and the sliding seat is slidably connected to the guide rail or slide groove on the front leg.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. When the child stroller frame of the present invention is folded, the push rod assembly rotates relative to the bottom support frame and moves closer to the rear legs. During the rotation process, the push rod assembly drives the seat support member to move through the transmission member, and the seat support member slides relative to the front legs, so that the seat support member moves closer to the front legs. During this process, the front legs also rotate relative to the rear legs and move closer to the rear legs, and finally the entire child stroller frame is folded. The entire child stroller frame has a simple structure, is easy and quick to fold, and has a small volume after folding, which is suitable for promotion and application.

[0019] 2. The two ends of the U-shaped handrail of the present invention are rotatably connected to the bottom support frame, and a traction member is provided between the U-shaped handrail and the seat support member, which can pull the U-shaped handrail to move closer to the front leg when the seat support member slides relative to the front leg. Therefore, when the child stroller frame is folded, the U-shaped handrail also moves in conjunction and folds closer to the front leg, realizing the linkage of the front handrail assembly, making the entire folding operation convenient and quick.

[0020] 3. When the stroller frame of the present invention is in a folded state, the seat support is stored inside the front legs, which can reduce the thickness of the stroller frame after folding, occupying less space and making it convenient to carry or store.

Brief Description of the Drawings

[0021] Figure 1 is a stereogram of Embodiment 1 of the present invention;

[0022] Figure 2 is a side view of embodiment 1 of the present invention;

[0023] Figure 3 is a cross-sectional view of embodiment 1 of the present invention;

[0024] Figure 4 is a three-dimensional diagram of the folding process of Example 1 of the present invention;

[0025] Figure 5 is a side view of the folding process of the embodiment 1 of the present invention;

[0026] Figure 6 is a side view of the folded state of embodiment 1 of the present invention;

[0027] Figure 7 is a three-dimensional diagram of the folded state of embodiment 1 of the present invention;

[0028] Figure 8 It is one of the three-dimensional views of the components of the present invention;

[0029] Fig. 9 is one of the exploded views of the components of the present invention;

[0030] Fig.10 This is the second exploded view of the components of the present invention;

[0031] Fig.11 It is the third exploded view of the components of the present invention;

[0032] Fig.12 This is the fourth exploded view of the components of the present invention;

[0033] Fig.13 It is the second stereogram of the component of the present invention;

[0034] Fig.14 This is the fifth exploded view of the components of the present invention;

[0035] Fig.15 This is the sixth exploded view of the components of the present invention;

[0036] Fig.16 is a stereogram of embodiment 2 of the present invention;

[0037] Fig.17 is a three-dimensional diagram of the folding process of Example 2 of the present invention;

[0038] Fig.18 It is a three-dimensional diagram of the folded state of embodiment 2 of the present invention. [Specific implementation method]

[0039] The present invention will be further described below in conjunction with the accompanying drawings:

[0040] Embodiment 1:

[0041] like Figures 1 to 7 as well as Fig.13As shown, a child stroller frame can be moved from an unfolded position to a folded position after a locking device is unlocked, comprising a bottom support frame 1, wherein the bottom support frame 1 comprises a front leg 11 and a rear leg 12 rotatably connected to the front leg 11 around a first axis A, wherein wheels 13 are provided at the lower ends of the front leg 11 and the rear leg 12, and the front leg 11 and the rear leg 12 can be unfolded or brought close to each other. A seat support 2 is provided on the bottom support frame 1, and a child can sit on the seat support 2, and the seat support 2 can be a plate-shaped structure or other frame-shaped structure. The seat support 2 is movably connected to the bottom support frame 1 to ensure that the seat support 2 can be brought close to and folded onto the bottom support frame 1. The seat support 2 is provided with a sliding portion 21 that can slide along the front leg 11. The bottom support frame 1 is also rotatably connected with a push rod assembly 3 around a second axis B. A transmission member 4 is provided between the push rod assembly 3 and the seat support 2, which can drive the seat support 2 to slide relative to the front leg 11 when the push rod assembly 3 rotates and approaches the bottom support frame 1. When the child stroller frame is in a folded state, the seat support 2 slides and approaches the front leg 11, and the push rod assembly 3 and the front leg 11 approach the rear leg 12. Specifically, when the child stroller frame is folded, the push rod assembly 3 rotates relative to the bottom support frame 1 and approaches the rear leg 12. During the rotation process, the push rod assembly 3 drives the seat support 2 to move through the transmission member 4, and the seat support 2 slides relative to the front leg 11, so that the seat support 2 approaches the front leg 11. In this process, the front leg 11 also rotates relative to the rear leg 12 and approaches the rear leg 12, and finally the entire child stroller frame is folded. The entire stroller has a simple frame structure, is easy and quick to fold, and has a small volume after folding.

[0042] In this embodiment, if Figure 1 and Fig.13 As shown, the front leg 11 is provided with a strip groove 113, and the sliding part 21 is a sliding column provided on the seat support 2, and the sliding column is inserted into the strip groove 113 and can slide inside to ensure that the seat support 2 moves smoothly when folded or unfolded relative to the front leg 11. Of course, the sliding part 21 can also be a sliding sleeve rotatably connected to the seat support 2, and the sliding sleeve is provided on the front leg 11 and can slide along the front leg 11, or the sliding part 21 can be a sliding seat rotatably connected to the seat support 2, and the sliding seat is slidably connected to the guide rail or the sliding groove on the front leg 11.

[0043] like Figure 3 and Fig.13As shown, the seat support 2 is also provided with a protrusion 22, and the protrusion 22 is rotatably connected to the rear leg 12 around the third axis C, ensuring that the seat support 2 is firmly supported when the child stroller frame is in the unfolded state, and has a high load-bearing capacity. Moreover, when the transmission member 4 drives the seat support 2 to slide relative to the front leg 11, the seat support 2 can also apply a force to the front leg 11 during the rotation relative to the rear leg 12, so that the front leg 11 rotates closer to the rear leg 12, so that the child stroller frame can be folded flexibly and has a strong load-bearing capacity on the basis of as few connecting rod structures as possible.

[0044] like Figure 3 and Figure 4 As shown, the transmission member 4 includes a transmission plate 41, the upper end of which is rotatably connected to the push rod assembly 3 around the fourth axis D, and the lower end of which is rotatably connected to the seat support 2 around the fifth axis E. Therefore, when the push rod assembly 3 rotates toward the rear leg 12, the transmission plate 41 pushes the seat support 2 downward to make the seat support 2 slide relative to the front leg 11 and approach the front leg 11.

[0045] like Figure 7 and Figure 7 As shown, when the stroller frame is in a folded state, the seat support 2 is stored inside the front leg 11, which can reduce the thickness of the stroller frame after folding, occupying less space and making it convenient to carry or store.

[0046] like Figure 1 , Figure 4 as well as Figures 8 to 12As shown, the upper end of the front leg is provided with a front connecting seat 111, the upper end of the rear leg 12 is fixed with a rear connecting seat 121, the push rod assembly 3 includes a lower push rod 31 and an upper push rod 32 rotatably connected to the lower push rod 31, the lower end of the lower push rod 31 is fixed with a push rod connecting seat 311, the push rod connecting seat 311, the front connecting seat 111 and the rear connecting seat 121 are coaxially rotatably connected, the front connecting seat 111 is arranged between the rear connecting seat 121 and the push rod connecting seat 311, and the locking device includes a first locking assembly 71 arranged between the front connecting seat 111 and the push rod connecting seat 311, a second locking assembly 72 is arranged between the upper push rod 32 and the lower push rod 31, an unlocking switch 73 for unlocking the second locking assembly 72 is arranged on the upper push rod 32, and an unlocking assembly 74 is arranged between the second locking assembly 72 and the first locking assembly 71, which can drive the first locking assembly 71 to unlock when the upper push rod 32 is rotated and folded relative to the lower push rod 31. When the stroller frame needs to be folded, the unlocking switch 73 is first operated to unlock the second locking assembly 72. At this time, the upper push rod 32 can be rotated forward. During the rotation process, the upper push rod 32 can drive the first locking assembly 71 to unlock through the unlocking assembly 74. Once the first locking assembly 71 is unlocked, the lower push rod 31 can rotate relative to the rear leg 12. During the rotation process, the seat support 2 is driven to slide relative to the front leg 11 through the transmission member 4, and the front leg 11 is brought close to the rear leg 12, thereby realizing the folding operation. Therefore, when folding is required, the unlocking switch 73 can be operated to realize the linkage unlocking, ensuring that the stroller frame is easy and quick to fold.

[0047] like Figures 8 to 10 As shown, the rear connecting seat 121 is provided with at least two arc grooves 122 along the circumferential direction, and the front connecting seat 111 is provided with a guide block 112 that penetrates into the arc groove 122 and can slide inside, so that the front legs 11 and the rear legs 12 can move smoothly when they are folded or unfolded backwards.

[0048] like Figure 4 and Fig.13As shown, the push rod assembly 3 includes a lower push rod 31 and an upper push rod 32 connected to the lower push rod 31, the rear end of the seat support 2 is provided with a backrest 8 that can rotate relative to it, a locking assembly 9 is provided between the backrest 8 and the seat support 2, the seat support 2 is provided with a push portion 23 that can keep the locking assembly 9 unlocked when the backrest 8 is in a set position, and the upper push rod 32 is provided with a push rod 33 that can press the backrest 8 when the push rod assembly 3 is rotated and folded relative to the bottom support frame 1, so that the unlocked backrest 8 rotates and moves closer to the rear legs 12. The backrest 8 can be arranged to support the back of the child and make the child sit comfortably. When the child stroller is in the unfolded state, the locking assembly 9 locks the backrest 8 and the seat support 2. When the child stroller frame needs to be folded, the locking assembly 9 is first unlocked and the backrest 8 is rotated backward. After the backrest 8 is rotated to a certain angle, the pushing portion 23 on the seat support 2 keeps the locking assembly 9 unlocked. Then the unlocking switch 73 is operated. When the push rod assembly 3 is rotated and folded relative to the bottom support frame 1, the pushing rod 33 is pressed on the backrest 8, thereby pushing the backrest 8 so that the backrest 8 is folded close to the rear legs 12, so that the child stroller frame is compact after being folded.

[0049] like Figures 13 to 15As shown, the locking assembly 9 includes a first locking groove 91 provided at the rear end of the seat support 2 along the circumferential direction, a second locking groove 92 is provided at the lower end of the backrest 8 along the circumferential direction, a locking gear 93 which can move laterally and can be engaged with the first locking groove 91 and the second locking groove 92 at the same time is provided in the space enclosed by the seat support 2 and the backrest 8, a lever handle 94 is provided at the upper end of the backrest 8, and a lever which can pull the locking gear 93 is provided between the lever handle 94 and the locking gear 93 A pull cable 95 is disengaged from the first locking groove 91, a third return spring 96 is provided between the locking gear 93 and the lower end of the backrest 8, and the third return spring 96 can push the locking gear 93 to return to its original position laterally. A clearance groove 97 is provided on the locking gear 93 along the circumferential direction. The pushing portion 23 is a protruding block provided on the seat support 2 and capable of cooperating with the clearance groove 97. After the backrest 8 is rotated to a set angle, the protruding block is disengaged from the clearance groove 97 and pushes the locking gear 93 to keep it disengaged from the first locking groove 91. When the locking assembly 9 is in the locked state, the engaging gear 93 is engaged with the first locking groove 91 and the second locking groove 92 at the same time, and the protruding block is located in the yielding groove 97. When the operating handle 94 is pulled and the engaging gear 93 is pulled horizontally by the cable 95, after the engaging gear 93 is disengaged from the first locking groove 91, the unlocking assembly 9 is unlocked. At this time, the backrest 8 can be rotated to adjust the angle. When the backrest 8 is rotated to the position where the protruding block is disengaged from the yielding groove 97, the protruding block can push the engaging gear 93 to keep the engaging gear 93 and the first locking groove 91 disengaged. At this time, when the push rod assembly 3 is rotated and folded, the push rod 33 can press the backrest 8 to make the backrest 8 further rotate relative to the seat support 2, thereby making the backrest 8 close to the rear leg 12.

[0050] like Figures 9 to 12As shown, the first locking assembly 71 includes a first slot 711 arranged on the front connecting seat 111 along the circumferential direction, the push rod connecting seat 311 is provided with a second slot 712 along the circumferential direction, a first locking gear 713 is provided between the push rod connecting seat 311 and the front connecting seat 111, which can move laterally in the space surrounded by the two and can simultaneously engage with the first slot 711 and the second slot 712, a first movable block 714 is provided between the first locking gear 713 and the push rod connecting seat 311, which can rotate and can laterally push the first locking gear 713 to disengage from the second slot 712 when rotating, a plurality of first inclined grooves 715 are provided on the first movable block 714 along the circumferential direction, the The push rod connecting seat 311 is provided with a first inclined protrusion 716 which can cooperate with the first inclined groove 715 and can push the first movable block 714 to move laterally when the first movable block 714 rotates. A first return spring 717 which can push the first locking gear 713 to return to its original position laterally is provided between the first locking gear 713 and the front connecting seat 111; the second locking assembly 72 includes a third clamping groove 721 arranged at the upper end of the lower push rod 31 along the circumferential direction, and a fourth clamping groove 722 is arranged at the lower end of the upper push rod 32 along the circumferential direction. A second locking gear 723 which can move laterally and can engage with the third clamping groove 721 and the fourth clamping groove 722 at the same time is provided in the space surrounded by the upper end of the lower push rod 31 and the lower end of the upper push rod 32. A second movable block 724 is provided between the upper end of the lower push rod 31 and the second locking gear 723, which can rotate and can laterally push the second locking gear 723 to disengage from the third slot 721 when rotating. The second movable block 724 is provided with a plurality of second inclined grooves 725 in the circumferential direction. The second locking gear 723 is provided with a second inclined protrusion 726 that can cooperate with the second inclined groove 725 and can be pushed when the second movable block 724 rotates. A second reset spring 727 that can push the second locking gear 723 to reset laterally is provided between the second locking gear 723 and the lower end of the upper push rod 32, and a pull rope 728 that can pull the second movable block 724 to rotate is provided between the second movable block 724 and the unlocking switch 73. The unlocking assembly 74 includes a rotating block 741 arranged between the upper end of the lower push rod 31 and the second movable block 724, the lower end of the upper push rod 32 is provided with a connecting shaft 742 that passes through the second return spring 727, the second locking gear 723, the second movable block 724 and the rotating block 741 and is connected to the upper end of the lower push rod 31, the rotating block 741 is provided with a protrusion 743, the connecting shaft 742 is provided with a pushing edge 744 that can push the protrusion 743 to rotate the rotating block 741 after the upper push rod 32 is rotated and folded relative to the lower push rod 31 to a set angle, and an unlocking rope 745 is provided between the rotating block 741 and the first movable block 714, which can pull the first movable block 714 to rotate when the rotating block 741 rotates.When the folding block 71 is in the state of being folded, the second locking gear 723 is disengaged from the third slot 721 by means of the second locking assembly 72. At this time, the second locking assembly 72 is unlocked, and the upper push rod 32 can be rotated and folded. During the rotation of the upper push rod 32, the top pushing edge 744 on the connecting shaft 742 on it pushes the protrusion 743 on the rotating block 741, so that the rotating block 741 rotates. The rotating block 741 pulls the first movable block 714 to rotate through the unlocking rope 745. The first movable block 714 moves horizontally through the cooperation of the first inclined slot 715 and the first inclined protrusion 716, thereby pushing the first locking gear 713 to disengage from the second locking slot 712. At this time, the first locking assembly 71 is unlocked, and the lower push rod 31 can be rotated and folded relative to the bottom support frame 1.

[0051] Embodiment 2:

[0052] like Figures 16 to 18 As shown, the difference between Example 2 and Example 1 is that:

[0053] The frame of the child stroller also includes a front armrest assembly 6, which can be grasped by the child to ensure safety. The front armrest assembly 6 includes a U-shaped armrest rod 61, and the two ends of the U-shaped armrest rod 61 are rotatably connected to the bottom support frame 1 around the sixth axis F. A traction member 62 is also provided between the U-shaped armrest rod 61 and the seat support 2, which can pull the U-shaped armrest rod 61 closer to the front leg 11 when the seat support 2 slides relative to the front leg 11. When the seat support 2 slides relative to the front leg 11, the seat support 2 pulls the U-shaped armrest rod 61 to rotate relative to the bottom support frame 1 through the traction member 62 and approaches the front leg 11, thereby realizing the linkage folding of the front armrest assembly 6, which is convenient and quick to fold.

[0054] like Figures 16 to 18 As shown, in this embodiment, the traction member 62 includes a traction plate 621, the upper end of the traction plate 621 is rotatably connected to the U-shaped handrail rod 61, and the lower end of the traction plate 621 is rotatably connected to the seat support member 2, with a simple structure and flexible folding.

[0055] like Fig.17 As shown, the U-shaped handrail rod 61, the front leg 11, the rear leg 12 and the push rod assembly 3 are coaxially rotatably connected, the structure is simple and compact, and the folding and closing are flexible.

[0056] The present 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 bottom support frame (1), wherein the bottom support frame (1) comprises a front leg (11) and a rear leg (12) rotatably connected to the front leg (11) around a first axis (A), wheels (13) are provided at the lower ends of the front leg (11) and the rear leg (12), the bottom support frame (1) is movably connected to a seat support member (2), the seat support member (2) is connected to a sliding portion (21) that can slide along the front leg (11), and the bottom support frame (1) is also rotatably connected to a second axis (A) The axis (B) is rotatably connected to a push rod assembly (3), and a transmission member (4) is provided between the push rod assembly (3) and the seat support member (2), which can drive the seat support member (2) to slide relative to the front leg (11) when the push rod assembly (3) rotates toward the bottom support frame (1). When the child stroller frame is in a folded state, the seat support member (2) slides toward the front leg (11), and the push rod assembly (3) and the front leg (11) are close to the rear leg (12).

2. The child stroller frame according to claim 1, characterized in that: The seat support (2) is also provided with a protrusion (22), and the protrusion (22) is rotatably connected to the rear leg (12) around a third axis (C).

3. The child stroller frame according to claim 1 or 2, characterized in that: The transmission member (4) comprises a transmission plate (41), the upper end of the transmission plate (41) is rotatably connected to the push rod assembly (3) around a fourth axis (D), and the lower end of the transmission plate (41) is rotatably connected to the seat support member (2) around a fifth axis (E).

4. The child stroller frame according to claim 1 or 2, characterized in that: When the child stroller frame is in a folded state, the seat support member (2) is stored at the inner side of the front leg (11).

5. The child stroller frame according to claim 1 or 2, characterized in that: The front armrest assembly (6) further comprises a U-shaped armrest rod (61), the two ends of the U-shaped armrest rod (61) being rotatably connected to the bottom support frame (1) around a sixth axis (F), and a traction member (62) is provided between the U-shaped armrest rod (61) and the seat support member (2) for pulling the U-shaped armrest rod (61) toward the front leg (11) when the seat support member (2) slides relative to the front leg (11).

6. The child stroller frame according to claim 5, characterized in that: The traction member (62) comprises a traction plate (621), the upper end of the traction plate (621) is rotatably connected to the U-shaped handrail rod (61), and the lower end of the traction plate (621) is rotatably connected to the seat support member (2).

7. The child stroller frame according to claim 5, characterized in that: The U-shaped handrail rod (61), the front leg (11), the rear leg (12) and the push rod assembly (3) are coaxially rotatably connected.

8. The child stroller frame according to claim 3, characterized in that: The upper end of the front leg is provided with a front connecting seat (111), the upper end of the rear leg (12) is fixed with a rear connecting seat (121), the push rod assembly (3) includes a lower push rod (31) and an upper push rod (32) rotatably connected to the lower push rod (31), the lower end of the lower push rod (31) is fixed with a push rod connecting seat (311), the push rod connecting seat (311), the front connecting seat (111) and the rear connecting seat (121) are coaxially rotatably connected, the front connecting seat (111) is arranged between the rear connecting seat (121) and the push rod connecting seat (311), and the locking device includes a first locking member arranged between the front connecting seat (111) and the push rod connecting seat (311). A fixed component (71), a second locking component (72) is provided between the upper push rod (32) and the lower push rod (31), an unlocking switch (73) for unlocking the second locking component (72) is provided on the upper push rod (32), an unlocking component (74) capable of driving the first locking component (71) to unlock when the upper push rod (32) is rotated and folded relative to the lower push rod (31), at least two arc grooves (122) are provided on the rear connecting seat (121) along the circumferential direction, and a guide block (112) is provided on the front connecting seat (111) which penetrates into the arc groove (122) and can slide inside.

9. The child stroller frame according to claim 3, characterized in that: The push rod assembly (3) comprises a lower push rod (31) and an upper push rod (32) connected to the lower push rod (31); a backrest (8) which can rotate relative to the seat support (2) is provided at the rear end of the seat support (2); a locking assembly (9) is provided between the backrest (8) and the seat support (2); a pushing portion (23) is provided on the seat support (2) which can keep the locking assembly (9) in an unlocked state when the backrest (8) is in a set position; and a pushing rod (33) is provided on the upper push rod (32) which can press the backrest (8) when the push rod assembly (3) is rotated and folded relative to the bottom support frame (1) to rotate the unlocked backrest (8) closer to the rear legs (12).

10. The child stroller frame according to claim 1, characterized in that: The front leg (11) is provided with a strip groove (113), and the sliding part (21) is a sliding column arranged on the seat support (2). The sliding column is inserted into the strip groove (113) and can slide inside.

11. The child stroller frame according to claim 1, characterized in that: The sliding part (21) is a sliding sleeve rotatably connected to the seat support (2), and the sliding sleeve is arranged on the front leg (11) and can slide along the front leg (11); or, the sliding part (21) is a sliding seat rotatably connected to the seat support (2), and the sliding seat is slidably connected to the guide rail or slide groove on the front leg (11).

Images