Stroller framework

Abstract

The utility model discloses a child stroller framework which comprises a bottom supporting frame, the bottom supporting frame comprises front legs and rear legs which are rotatably connected with the front legs around a first axis, wheels are arranged at the lower ends of the front legs and the rear legs, a seat supporting piece is movably connected to the bottom supporting frame, and the seat supporting piece is movably connected with 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] This utility model relates to a children's stroller frame. [Background Technology]

[0002] Strollers are common products during a child's growth process. They can generally be unfolded or folded. When unfolded, they are used for children to ride in and out, while when folded, they are convenient to carry or store.

[0003] The structure of a stroller frame directly affects the ease of folding and the compactness of the folded size. Currently, there are various linkage structures in stroller frames on the market, and their folding mechanisms differ. This invention provides a novel stroller frame that differs from existing ones. [Utility Model Content]

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a children's stroller frame that is simple in structure, easy to fold, and small in size after folding.

[0005] This utility model is achieved through the following technical solution:

[0006] A stroller frame, movable from an unfolded position to a folded position after the locking device is unlocked, includes a bottom support frame. The bottom support frame includes a front leg and a rear leg rotatably connected to the front leg about a first axis. The lower ends of the front and rear legs are provided with wheels. A seat support is movably connected to the bottom support frame. The seat support is connected to a sliding part that can slide along the front leg. A push rod assembly is also rotatably connected to the bottom support frame about a second axis. A transmission component is provided between the push rod assembly and the seat support, which can drive the seat support to slide relative to the front leg when the push rod assembly rotates towards the bottom support frame. When the stroller frame is in the folded state, the seat support slides towards the front leg, and the push rod assembly and the front leg approach the rear leg.

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

[0008] The transmission component includes 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 component around a fifth axis.

[0009] When the stroller frame is folded, the seat support is tucked inside the front legs.

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

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

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

[0013] The front leg has a front connecting seat at its upper end, and the rear leg has a rear connecting seat fixed at its upper end. 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 with a push rod connecting seat. The push rod connecting seat, the front connecting seat, and the rear connecting seat are coaxially rotatably connected. The front connecting seat is located between the rear connecting seat and the push rod connecting seat. The locking device includes a first locking component located between the front connecting seat and the push rod connecting seat. A second locking component is located between the upper push rod and the lower push rod. The upper push rod has an unlocking switch for unlocking the second locking component. An unlocking component is located between the second locking component and the first locking component, which can drive the first locking component to unlock when the upper push rod rotates and folds relative to the lower push rod. The rear connecting seat has at least two arc-shaped grooves along the circumferential direction. The front connecting seat has a guide block that passes through the arc-shaped grooves and can slide inside them.

[0014] The push rod assembly includes a lower push rod and an upper push rod connected to the lower push rod. The rear end of the seat support is provided with a backrest that can rotate relative to it. A locking assembly is provided between the backrest and the seat support. The seat support is provided with a push part that can keep the locking assembly in an unlocked state when the backrest is in a set position. The upper push rod is provided with a push rod that can press against the backrest when the push rod assembly rotates and folds relative to the bottom support frame, so that the unlocked backrest rotates and moves closer to the rear legs.

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

[0016] The sliding part is a sliding sleeve rotatably connected to the seat support, the sliding sleeve is fitted 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, the sliding seat is slidably connected to the guide rail or groove on the front leg.

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

[0018] 1. When the stroller frame of this utility model is folded, the push rod assembly rotates relative to the bottom support frame and moves towards the rear legs. During the rotation of the push rod assembly, the seat support component moves through the transmission component, causing the seat support component to slide relative to the front legs, thus bringing the seat support component closer to the front legs. During this process, the front legs also rotate relative to the rear legs and move towards the rear legs, ultimately achieving the folding of the entire stroller frame. The entire stroller frame has a simple structure, is easy and quick to fold, and has a small folded size, making it suitable for widespread application.

[0019] 2. The two ends of the U-shaped armrest of this utility model are rotatably connected to the bottom support frame. A traction component is also provided between the U-shaped armrest and the seat support, which pulls the U-shaped armrest closer to the front leg when the seat support slides relative to the front leg. Therefore, when the stroller frame is folded, the U-shaped armrest also folds and moves closer to the front leg, realizing the linkage of the front armrest assembly and making the entire folding operation convenient and quick.

[0020] 3. When the stroller frame of this utility model is in the folded state, the seat support is stored inside the front legs, which can reduce the thickness of the stroller frame after folding, occupy less space, and make it convenient to carry or store. [Attached Image Description]

[0021] Figure 1 This is a perspective view of Embodiment 1 of this utility model;

[0022] Figure 2 This is a side view of Embodiment 1 of the present utility model;

[0023] Figure 3 This is a cross-sectional view of Embodiment 1 of this utility model;

[0024] Figure 4 This is a perspective view of the folding process in Embodiment 1 of this utility model;

[0025] Figure 5 This is a side view of Embodiment 1 of this utility model during the folding process;

[0026] Figure 6 This is a side view of Embodiment 1 of this utility model in its folded state;

[0027] Figure 7 This is a perspective view of the folded state of Embodiment 1 of this utility model;

[0028] Figure 8 This is one of the perspective views of the components of this utility model;

[0029] Figure 9 This is one of the exploded views of the components of this utility model;

[0030] Figure 10This is the second exploded view of a component of this utility model;

[0031] Figure 11 This is the third exploded view of the components of this utility model;

[0032] Figure 12 This is the fourth exploded view of the components of this utility model;

[0033] Figure 13 This is the second perspective view of a component of this utility model;

[0034] Figure 14 This is the fifth exploded view of the components of this utility model;

[0035] Figure 15 This is the sixth exploded view of the components of this utility model;

[0036] Figure 16 This is a perspective view of Embodiment 2 of this utility model;

[0037] Figure 17 This is a perspective view of the folding process in Embodiment 2 of this utility model;

[0038] Figure 18 This is a perspective view of the folded state of Embodiment 2 of this utility model.

Detailed Implementation Methods

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

[0040] Example 1:

[0041] like Figures 1 to 7 as well as Figure 13As shown, a stroller frame can be moved from an unfolded position to a folded position after the locking device is unlocked. It includes a bottom support frame 1, which 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 front leg 11 and the rear leg 12 can be unfolded or brought closer together. A seat support 2 is provided on the bottom support frame 1, on which a child can sit. The seat support 2 can be a plate-like structure or other frame-like structure. The seat support 2 is movably connected to the bottom support frame 1 to ensure that the seat support 2 can be folded onto the bottom support frame 1. The seat support 2 is provided with a sliding part 21 that can slide along the front leg 11. The bottom support frame 1 is also rotatably connected to a push rod assembly 3 around the second axis B. A transmission component 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 moves closer to the bottom support frame 1. When the stroller frame is in the folded state, the seat support 2 slides and moves closer to the front leg 11, and the push rod assembly 3 and the front leg 11 move closer to the rear leg 12. Specifically, when the stroller frame is folded, the push rod assembly 3 rotates relative to the bottom support frame 1 and moves closer to the rear leg 12. During the rotation, the push rod assembly 3 drives the seat support 2 to move through the transmission component 4, and the seat support 2 slides relative to the front leg 11, thereby moving the seat support 2 closer to the front leg 11. During this process, the front leg 11 also rotates relative to the rear leg 12 and moves closer to the rear leg 12, ultimately realizing the folding of the entire stroller frame. The stroller has a simple frame structure, is easy and quick to fold, and has a small size when folded.

[0042] In this embodiment, as Figure 1 and Figure 13 As shown, the front leg 11 is provided with a strip groove 113, and the sliding part 21 is a sliding post provided on the seat support 2. The sliding post is inserted into the strip groove 113 and can slide inside it to ensure smooth movement of the seat support 2 relative to the front leg 11 when folded or unfolded. Of course, the sliding part 21 can also be a sliding sleeve rotatably connected to the seat support 2. The sliding sleeve is fitted on the front leg 11 and can slide along the front leg 11. Alternatively, the sliding part 21 can be a sliding seat rotatably connected to the seat support 2. The sliding seat is slidably connected to the guide rail or groove on the front leg 11.

[0043] like Figure 3 and Figure 13As shown, the seat support 2 is also provided with a protrusion 22, which is rotatably connected to the rear leg 12 around the third axis C, ensuring that the seat support 2 is firmly supported when the stroller frame is unfolded, and has a high load-bearing capacity. Moreover, when the transmission component 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, causing the front leg 11 to rotate and move closer to the rear leg 12. This makes the stroller frame flexible to fold and close with a minimal link structure and has a strong load-bearing capacity.

[0044] like Figure 3 and Figure 4 As shown, the transmission component 4 includes a transmission plate 41. The upper end of the transmission plate 41 is rotatably connected to the push rod assembly 3 around the fourth axis D, and the lower end of the transmission plate 41 is rotatably connected to the seat support 2 around the fifth axis E. Therefore, when the push rod assembly 3 rotates and moves closer to the rear leg 12, the transmission plate 41 pushes the seat support 2 downward, so that the seat support 2 slides relative to the front leg 11 and moves closer to the front leg 11.

[0045] like Figure 7 and Figure 7 As shown, when the stroller frame is folded, the seat support 2 is tucked into the inside of the front leg 11, which reduces the thickness of the stroller frame after folding, occupies less space, and is 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, and 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 located between the rear connecting seat 121 and the push rod connecting seat 311. The locking device includes a first locking assembly 71 located between the front connecting seat 111 and the push rod connecting seat 311. A second locking assembly 72 is provided between the upper push rod 32 and the lower push rod 31. The upper push rod 32 is provided with an unlocking switch 73 for unlocking the second locking assembly 72. An unlocking assembly 74 is provided 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 rotates and folds relative to the lower push rod 31. When the stroller frame needs to be folded, first operate the unlocking switch 73 to unlock the second locking component 72. Then, rotate the folding push rod 32 forward. During rotation, the push rod 32 unlocks the first locking component 71 via the unlocking component 74. Once the first locking component 71 is unlocked, the lower push rod 31 rotates relative to the rear leg 12. During this rotation, the transmission component 4 drives the seat support 2 to slide relative to the front leg 11, bringing the front leg 11 closer to the rear leg 12, thus achieving the folding operation. Therefore, simply operating the unlocking switch 73 is sufficient to unlock the stroller frame, ensuring convenient and quick folding.

[0047] like Figures 8 to 10 As shown, the rear connecting seat 121 is provided with at least two arc-shaped grooves 122 along the circumferential direction, and the front connecting seat 111 is provided with a guide block 112 that passes through the arc-shaped grooves 122 and can slide inside, so that the front leg 11 and the rear leg 12 move smoothly when they retract or extend backward.

[0048] like Figure 4 and Figure 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 part 23 that can keep the locking assembly 9 unlocked when the backrest 8 is in a set position. The upper push rod 32 is provided with a push rod 33 that can press against the backrest 8 when the push rod assembly 3 rotates and folds relative to the bottom support frame 1, causing the unlocked backrest 8 to rotate and move closer to the rear leg 12. The backrest 8 is designed to support the child's back, making the child comfortable to sit in. When the stroller is unfolded, the locking assembly 9 locks the backrest 8 and the seat support 2. When the 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 push part 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 rotates and folds relative to the bottom support frame 1, the push rod 33 presses on the backrest 8, thereby pushing the backrest 8 and causing it to fold closer to the rear legs 12, making the stroller frame compact after folding.

[0049] like Figures 13 to 15As shown, the locking assembly 9 includes a first locking groove 91 located circumferentially at the rear end of the seat support 2, and a second locking groove 92 located circumferentially at the lower end of the backrest 8. Within the space enclosed by the seat support 2 and the backrest 8, there is an engaging gear 93 that can move laterally and engage simultaneously with the first locking groove 91 and the second locking groove 92. An actuating handle 94 is located at the upper end of the backrest 8, and a mechanism between the actuating handle 94 and the engaging gear 93 allows for pulling the engaging gear 93. The cable 95 is disengaged from the first locking groove 91. A third return spring 96 is provided between the engaging gear 93 and the lower end of the backrest 8 to push the engaging gear 93 to return to its horizontal position. The engaging gear 93 is provided with a relief groove 97 along the circumferential direction. The pushing part 23 is a protrusion provided on the seat support 2 and can cooperate with the relief groove 97. After the backrest 8 rotates at a set angle, the protrusion disengages from the relief groove 97 and pushes the engaging gear 93 to remain disengaged from the first locking groove 91. When the locking assembly 9 is locked, the engaging gear 93 engages simultaneously with the first locking groove 91 and the second locking groove 92, and the protrusion is located in the relief groove 97. When the lever 94 is operated and the engaging gear 93 is pulled laterally by the cable 95, the unlocking assembly 9 is unlocked after the engaging gear 93 disengages from the first locking groove 91. At this time, the backrest 8 can be rotated to adjust the angle. When the backrest 8 is rotated to the position where the protrusion disengages from the relief groove 97, the protrusion can push against the engaging gear 93 to keep the engaging gear 93 disengaged from the first locking groove 91. 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 rotate further relative to the seat support 2, so that the backrest 8 moves closer to the rear leg 12.

[0050] like Figures 9 to 12As shown, the first locking assembly 71 includes a first slot 711 arranged circumferentially on the front connecting seat 111, and a second slot 712 arranged circumferentially on the push rod connecting seat 311. A first locking gear 713 is provided between the push rod connecting seat 311 and the front connecting seat 111, capable of lateral movement within the space enclosed by the two and simultaneously engaging 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, capable of rotation and laterally pushing the first locking gear 713 away from the second slot 712 during rotation. The first movable block 714 has multiple first inclined slots 715 arranged circumferentially. The push rod connecting seat 311 is provided with a first inclined protrusion 716 that can cooperate with the first inclined groove 715 and push the first movable block 714 to move laterally when the first movable block 714 rotates. A first return spring 717 that can push the first locking gear 713 to return laterally is provided between the first locking gear 713 and the front connecting seat 111. The second locking assembly 72 includes a third slot 721 provided circumferentially on the upper end of the lower push rod 31, and a fourth slot 722 provided circumferentially on the lower end of the upper push rod 32. A second locking gear 723 that can move laterally and can engage with the third slot 721 and the fourth slot 722 is provided in the space enclosed 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. This block is rotatable and, when rotated, can laterally push the second locking gear 723 to disengage from the third slot 721. The second movable block 724 has multiple second inclined grooves 725 along its circumference. The second locking gear 723 has a second inclined protrusion 726 that engages with the second inclined grooves 725 and can be pushed when the second movable block 724 rotates. A second return spring 727 is provided between the second locking gear 723 and the lower end of the upper push rod 32, enabling the second locking gear 723 to return to its lateral position. A pull rope 728 is provided between the second movable block 724 and the unlocking switch 73, allowing the second movable block 724 to rotate. The unlocking component 74 includes a rotating block 741 located 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 reset 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 and cause the rotating block 741 to rotate after the upper push rod 32 rotates and folds relative to the lower push rod 31 at a set angle. An unlocking rope 745 is provided between the rotating block 741 and the first movable block 714 that can pull the first movable block 714 to rotate when the rotating block 741 rotates.The specific operation is as follows: Press the unlock switch 73, pull the second movable block 724 to rotate through the pull rope 728. During the rotation, the second movable block 724 causes the second locking gear 723 to move laterally through the cooperation of the second inclined groove 725 and the second inclined protrusion 726. The second locking gear 723 disengages from the third slot 721. At this time, the second locking component 72 is unlocked. Then, the upper push rod 32 can be rotated and folded. During the rotation, the push edge 744 on the connecting shaft 742 of the upper push rod 32 pushes the protrusion 743 on the rotating block 741, causing the rotating block 741 to rotate. The rotating block 741 then pulls the first movable block 714 to rotate through the unlock rope 745. The first movable block 714 moves laterally through the cooperation of the first inclined groove 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 component 71 is unlocked, and the lower push rod 31 can rotate and fold relative to the bottom support frame 1.

[0051] Example 2:

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

[0053] The stroller frame also includes a front armrest assembly 6, which provides a grip for children to ensure safety. The front armrest assembly 6 includes a U-shaped armrest bar 61, the two ends of which are rotatably connected to the bottom support frame 1 around the sixth axis F. A traction element 62 is also provided between the U-shaped armrest bar 61 and the seat support 2, which pulls the U-shaped armrest bar 61 towards 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 bar 61 relative to the bottom support frame 1 via the traction element 62, causing it to rotate and move towards the front leg 11, thus achieving a coordinated 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 61, and the lower end of the traction plate 621 is rotatably connected to the seat support member 2. The structure is simple and flexible in closing.

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

[0056] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A stroller frame that can move from an unfolded position to a folded position after the locking device is unlocked, characterized in that: The system includes a bottom support frame (1), which includes a front leg (11) and a rear leg (12) rotatably connected to the front leg (11) about a first axis (A). The lower ends of the front leg (11) and the rear leg (12) are provided with wheels (13). A seat support member (2) is movably connected to the bottom support frame (1), and a sliding part (21) that can slide along the front leg (11) is connected to the seat support member (2). The bottom support frame (1) also includes a second... A push rod assembly (3) is rotatably connected to the axis (B). A transmission component (4) is provided between the push rod assembly (3) and the seat support (2) to 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 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).

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

3. The stroller frame according to claim 1 or 2, characterized in that: The transmission component (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 component (2) around the fifth axis (E).

4. The stroller frame according to claim 1 or 2, characterized in that: When the stroller frame is folded, the seat support (2) is tucked inside the front leg (11).

5. The stroller frame according to claim 1 or 2, characterized in that: It also includes a front armrest assembly (6), which includes a U-shaped armrest bar (61). The two ends of the U-shaped armrest bar (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 bar (61) and the seat support member (2) to pull the U-shaped armrest bar (61) towards the front leg (11) when the seat support member (2) slides relative to the front leg (11).

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

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

8. The stroller frame according to claim 3, characterized in that: The front leg is provided with a front connecting seat (111) at its upper end, and the rear leg (12) is fixed with a rear connecting seat (121) at its upper end. 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 and rotatably connected. The front connecting seat (111) is located between the rear connecting seat (121) and the push rod connecting seat (311). The locking device includes a first lock located between the front connecting seat (111) and the push rod connecting seat (311). The fixed component (71) is provided with a second locking component (72) between the upper push rod (32) and the lower push rod (31). The upper push rod (32) is provided with an unlocking switch (73) for unlocking the second locking component (72). The second locking component (72) and the first locking component (71) are provided with an unlocking component (74) that can drive the first locking component (71) to unlock when the upper push rod (32) rotates and folds relative to the lower push rod (31). The rear connecting seat (121) is provided with at least two arc-shaped grooves (122) along the circumferential direction. The front connecting seat (111) is provided with a guide block (112) that passes through the arc-shaped grooves (122) and can slide inside.

9. The stroller frame according to claim 3, characterized in that: 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 part (23) that can keep the locking assembly (9) unlocked when the backrest (8) is in a set position. The upper push rod (32) is provided with a push rod (33) that can press against the backrest (8) when the push rod assembly (3) rotates and folds relative to the bottom support frame (1), so that the backrest (8) in the unlocked state rotates and moves closer to the rear leg (12).

10. The 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 provided on the seat support (2). The sliding column is inserted into the strip groove (113) and can slide inside it.

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

Images