A child's pushchair chassis

Abstract

The utility model discloses a child's shallow skeleton, bottom support frame includes rear support, the rear support lower extreme be equipped with rear wheel, rear support upper end be equipped with rear support seat, the rear support seat on rotatable connection has the front support around first axis, the front support lower extreme be equipped with front wheel, the bottom support frame on rotatable connection has the push rod subassembly around second axis, the push rod subassembly with bottom support frame between still be equipped with in the push rod subassembly relative rear support rotating folding can drive front support and rear support rotating and draw close linkage subassembly, the bottom support frame on rotatable connection still has the handrail seat around third axis, the handrail seat on be equipped with handrail, the handrail seat with linkage subassembly between be equipped with in front support and rear support rotating and draw close can drive handrail seat and handrail relative rear support rotating folding transmission rod. The utility model discloses simple structure, and folding is smooth, and the volume is small after folding.

Description

Technical Field

[0001] This utility model relates to a children's stroller frame. Background Technology

[0002] Strollers are a common product during a child's growth. Most current strollers can be unfolded or folded; when unfolded, they provide a comfortable ride for children, while when folded, they are easy to carry or store. However, the structures and folding principles of stroller frames on the market vary considerably. Therefore, this invention provides a novel stroller frame that differs from existing ones. Utility Model Content

[0003] 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, folds smoothly, and has a small size after folding.

[0004] This utility model is achieved through the following technical solution:

[0005] 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 rear support rod with a rear wheel at its lower end and a rear support seat at its upper end. A front support rod is rotatably connected to the rear support seat about a first axis, and a front wheel is connected to the lower end of the front support rod. A push rod assembly is rotatably connected to the bottom support frame about a second axis. A linkage component is also provided between the push rod assembly and the bottom support frame, which can drive the front and rear support rods to rotate and fold closer together when the push rod assembly rotates and folds relative to the rear support rod. An armrest seat is rotatably connected to the bottom support frame about a third axis, and an armrest is connected to the armrest seat. A transmission rod is provided between the armrest seat and the linkage component, which can drive the armrest seat and armrest to rotate and fold relative to the rear support rod when the front and rear support rods rotate and fold closer together.

[0006] The upper end of the transmission rod is rotatably connected to the armrest seat around the fourth axis and offset from the third axis, and the lower end of the transmission rod is rotatably connected to the linkage assembly.

[0007] The stroller frame also includes a seat frame, which includes a front frame and a rear frame rotatably connected to the rear end of the front frame around the tenth axis. The middle part of the rear frame is rotatably connected to the rear support around the eleventh axis. A front connecting rod is provided between the front side of the front frame and the linkage assembly, which can drive the front frame and the rear frame to rotate and fold when the front support rod and the rear support rod rotate and approach each other. The upper end of the front connecting rod is rotatably connected to the front frame around the thirteenth axis, and the lower end of the front connecting rod is rotatably connected to the linkage assembly around the twelfth axis.

[0008] The linkage assembly includes a first linkage rod, a second linkage rod, and a third linkage rod. The front end of the first linkage rod is rotatably connected to the front support rod around a fifth axis. The rear end of the second linkage rod is rotatably connected to the rear support rod around a sixth axis. The rear end of the first linkage rod is rotatably connected to the front end of the second linkage rod around a seventh axis. The upper end of the third linkage rod is rotatably connected to the push rod assembly around an eighth axis. The lower end of the third linkage rod is rotatably connected to either the first or second linkage rod around a ninth axis. The lower ends of the transmission rod and the front connecting rod are rotatably connected to the first linkage rod.

[0009] The push rod assembly and the armrest seat are rotatably connected to the rear support on a coaxial axis.

[0010] The transmission rod, the front connecting rod, and the first linkage rod are coaxially pivotally connected around the twelfth axis, and the push rod assembly, the armrest seat, the rear support, and the rear side frame are coaxially pivotally connected.

[0011] 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 provided with a push rod seat. The push rod seat is rotatably connected to the rear support around a second axis. The locking device includes a plurality of first slots arranged along the circumferential direction on the push rod seat. The rear support is provided with a plurality of second slots arranged along the circumferential direction. A locking gear is provided in the space enclosed by the push rod seat and the rear support. It can move laterally within the space and can engage with the first and second slots simultaneously. A movable block is provided between the locking gear and the push rod seat. It can rotate and push the locking gear to disengage from the first slot when rotating. A traction member is provided between the movable block and the upper push rod. It can pull the movable block to rotate when the upper push rod rotates and folds relative to the lower push rod. A return spring is also provided between the locking gear and the rear support. It can push the locking gear to move laterally and reset.

[0012] The upper end of the lower push rod is provided with an upper connecting seat, and the lower end of the upper push rod is provided with a lower connecting seat that is rotatably connected to the upper connecting seat. The upper connecting seat is provided with a latch, and the lower connecting seat is provided with a locking pin that can engage or disengage with the latch. The upper push rod is provided with a switch, and the switch is connected to the locking pin through a first pull rope. A torsion spring is provided between the upper connecting seat and the lower connecting seat, which can drive the upper push rod to rotate and fold relative to the lower push rod when the locking pin disengages from the latch.

[0013] The traction component includes a second pull rope connected to the eccentric position of the movable block. The second pull rope is threaded through the lower push rod. The second pull rope is provided with a connecting block. The connecting block is provided with a horizontal shaft. The lower connecting seat is provided with a drive groove for inserting the horizontal shaft and for pushing the horizontal shaft through the groove wall to pull the second pull rope when the upper push rod rotates and folds relative to the lower push rod.

[0014] The armrest seat is provided with a first abutting surface that abuts against the third linkage rod when the stroller frame is unfolded, and the lower end of the push rod assembly is provided with a second abutting surface that abuts against the transmission rod when the stroller frame is unfolded.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 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 support rod. During this process, the linkage assembly drives the front support rod and the rear support rod to fold together, realizing the folding of the bottom support frame. More importantly, when the front support rod and the rear support rod fold together, the linkage assembly drives the transmission rod to move, so that the armrest can also rotate and fold relative to the rear support rod, realizing the linkage folding of the armrest. The entire folding operation is very simple and quick. Just operate the push rod assembly to rotate and fold to realize the linkage of each part. Moreover, the folded size is very small and can be carried on the overhead luggage rack of an airplane, making it easy to carry and store.

[0017] 2. The seat frame of this utility model includes a front frame and a rear frame. When unfolded, the front frame and the rear frame unfold relative to each other to form a seat frame that can be used for sitting. When folding is required, the linkage component drives the front frame and the rear frame to rotate and fold through the front connecting rod, realizing the linkage folding of the seat frame, making the stroller frame fold smoothly. Moreover, the seat frame adopts a two-section design, which can reduce the thickness of the stroller frame after folding, making the stroller frame easy to store and carry.

[0018] 3. This utility model has a simple structure, folds smoothly and flexibly, and can achieve automatic folding, making it suitable for widespread application. Attached Figure Description

[0019] Figure 1 This is a perspective view of the utility model;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a cross-sectional view of the present invention;

[0022] Figure 4 This is a side view of the present invention during the folding process;

[0023] Figure 5 This is a cross-sectional view of the present invention during the folding process;

[0024] Figure 6 This is a perspective view of the utility model in its folded state;

[0025] Figure 7 This is a side view of the present invention in its folded state;

[0026] Figure 8This is one of the exploded views of the components of this utility model;

[0027] Figure 9 This is the second exploded view of a component of this utility model;

[0028] Figure 10 This is the third exploded view of the component of this utility model;

[0029] Figure 11 This is the fourth exploded view of the component of this utility model. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] like Figures 1 to 7 As shown, a stroller frame can be moved from an unfolded position to a folded position after the locking device is unlocked. In the unfolded position, it is used for children to ride in, while in the folded position, it is easy to carry or store. In actual use, a soft textile such as a cloth cover (not shown) is attached to the stroller frame to ensure the child's comfort. This stroller frame includes a bottom support frame 1 for support on the ground. The bottom support frame 1 includes a rear support rod 11, with a rear wheel 12 at the lower end of the rear support rod 11 and a rear support seat 13 at the upper end. A front support rod 14 is rotatably connected to the rear support seat 13 around a first axis A, and a front wheel 15 is connected to the lower end of the front support rod 14. A push rod assembly 2 for pushing is rotatably connected to the bottom support frame 1 around a second axis B. The push rod assembly 2... A linkage component 3 is provided between the bottom support frame 1, which can drive the front support rod 14 and the rear support rod 11 to rotate and move closer together when the push rod assembly 2 rotates and folds relative to the rear support rod 11. The bottom support frame 1 is also rotatably connected to the armrest seat 41 around the third axis C. The armrest seat 41 is connected to the armrest 42. A transmission rod 5 is provided between the armrest seat 41 and the linkage component 3, which can drive the armrest seat 41 and the armrest 42 to rotate and fold relative to the rear support rod 11 when the front support rod 14 and the rear support rod 11 rotate and move closer together. When the stroller frame is folded, the push rod assembly 2 rotates relative to the bottom support frame 1 and moves towards the rear support rod 11. During this process, the linkage assembly 3 drives the front support rod 14 and the rear support rod 11 to fold together, thus folding the bottom support frame 1. Furthermore, as the front support rod 14 and the rear support rod 11 fold together, the linkage assembly 3 also drives the transmission rod 5 to move, causing the transmission rod 5 to rotate and fold relative to the rear support rod 11, achieving a linked folding of the armrest 42. The entire folding operation is very simple and quick; simply operating the push rod assembly 2 to rotate and fold achieves the linkage of all parts. Moreover, the folded size is very small, allowing it to be carried in the overhead luggage compartment of an airplane for easy carrying and storage. The locking device of the stroller frame can adopt a traditional locking structure. Of course, the specific locking device used in this embodiment will be described in detail later.

[0032] like Figures 2 to 5 As shown, the push rod assembly 2 and the armrest seat 41 are rotatably connected to the rear support 13 on a coaxial axis. The upper end of the transmission rod 5 is rotatably connected to the armrest seat 41 around the fourth axis D and offset from the third axis C. The lower end of the transmission rod 5 is rotatably connected to the linkage assembly 3. When the linkage assembly 3 pulls the front support rod 14 and the rear support rod 11 to move closer to each other, the linkage assembly 3 pulls the lower end of the transmission rod 5, and the transmission rod 5 pulls the armrest seat 41 to rotate relative to the rear support 13 and fold. The folding is very smooth and flexible. Moreover, the push rod assembly 2 and the armrest seat 41 are coaxially connected, and the whole structure is also very compact.

[0033] like Figures 1 to 7 As shown, the stroller frame also includes a seat frame 6, which includes a front frame 61 and a rear frame 62 rotatably connected to the rear end of the front frame 61 around the tenth axis J. The middle part of the rear frame 62 is rotatably connected to the rear support 13 around the eleventh axis K. The front side of the front frame 61 is provided with a front connecting rod 63 between the front side and the linkage assembly 3, which can drive the front frame 61 and the rear frame 62 to rotate and fold when the front support rod 14 and the rear support rod 11 rotate and approach each other. The upper end of the front connecting rod 63 is rotatably connected to the front frame 61 around the thirteenth axis M, and the lower end of the front connecting rod 63 is rotatably connected to the linkage assembly 3 around the twelfth axis L. When the stroller frame is unfolded, the front frame 61 and the rear frame 62 unfold relative to each other to form a seat frame that can be used for sitting. When it needs to be folded, the linkage component 3 drives the front frame 61 and the rear frame 62 to rotate and fold through the front connecting rod 63, realizing the linkage folding of the seat frame 6, making the stroller frame fold smoothly. Moreover, the seat frame 6 adopts a two-section design, which can reduce the thickness of the stroller frame after folding, making the stroller frame easy to store and carry.

[0034] like Figures 1 to 5As shown, the linkage assembly 3 in this embodiment includes a first linkage rod 31, a second linkage rod 32, and a third linkage rod 33. The front end of the first linkage rod 31 is rotatably connected to the front support rod 14 around the fifth axis E. The rear end of the second linkage rod 32 is rotatably connected to the rear support rod 11 around the sixth axis F. The rear end of the first linkage rod 31 is rotatably connected to the front end of the second linkage rod 32 around the seventh axis G. The upper end of the third linkage rod 33 is rotatably connected to the push rod assembly 2 around the eighth axis H. The lower end of the third linkage rod 33 is rotatably connected to either the first linkage rod 31 or the second linkage rod 32 around the ninth axis I. The lower ends of the transmission rod 5 and the front connecting rod 63 are rotatably connected to the first linkage rod 31. When the stroller frame is folded, the push rod assembly 2 rotates relative to the rear support 13 and moves closer to the rear support rod 11. The push rod assembly 2 then presses down on the third linkage rod 33, which in turn pushes the first linkage rod 31 and the second linkage rod 32 downwards. This causes the first linkage rod 31 and the second linkage rod 32 to rotate relative to the front support rod 14 and the rear support rod 11, pulling the front support rod 14 and the rear support rod 11 closer together, thus achieving the linkage folding of the bottom support frame 1. In this embodiment, the lower end of the third linkage rod 33, the rear end of the first linkage rod 31, and the front end of the second linkage rod 32 are coaxially pivotally connected to ensure that the stroller frame structure is compact and folds flexibly. When the first linkage rod 31 rotates relative to the front support rod 14 and its rear end moves downwards, the first linkage rod 31 pulls the front connecting rod 63 and the transmission rod 5 downwards, thereby folding the seat frame 6 and rotating and folding the armrest 42 and the armrest seat 41.

[0035] like Figures 2 to 5 As shown, the transmission rod 5, the front connecting rod 63 and the first linkage rod 31 are coaxially pivotally connected around the twelfth axis L, and the push rod assembly 2, the armrest seat 41, the rear support 13 and the rear side frame 62 are coaxially pivotally connected, making the overall structure of the stroller frame compact and flexible to fold and close.

[0036] like Figures 1 to 5 As shown, the push rod assembly 2 includes a lower push rod 21 and an upper push rod 22 rotatably connected to the lower push rod 21. The lower end of the lower push rod 21 is provided with a push rod seat 23, and the push rod seat 23 is rotatably connected to the rear support 13 around the second axis B.

[0037] like Figure 1 , Figures 8 to 11As shown, the locking device includes multiple first slots 71 arranged circumferentially on the push rod seat 23, and multiple second slots 72 arranged circumferentially on the rear support 13. A locking gear 73, capable of lateral movement within the space enclosed by the push rod seat 23 and the rear support 13, is provided, simultaneously engaging with the first and second slots 71 and 72. A movable block 74, rotatable and capable of disengaging the locking gear 73 from the first slots 71 during rotation, is provided between the locking gear 73 and the push rod seat 23. A traction member 75, capable of pulling the movable block 74 to rotate when the upper push rod 22 rotates and folds relative to the lower push rod 21, is provided between the locking gear 73 and the rear support 13. A return spring 76, capable of pushing the locking gear 73 to lateral movement and reset, is also provided between the locking gear 73 and the rear support 13. An upper connecting seat 24 is provided at the upper end of the lower push rod 21, and a rotatable connection seat 24 is provided at the lower end of the upper push rod 22. The lower connecting seat 25 is connected to the upper connecting seat 24, which is provided with a bayonet 77. The lower connecting seat 25 is provided with a locking pin 78 that can engage or disengage with the bayonet 77. The upper push rod 22 is provided with a switch 79. The switch 79 and the locking pin 78 are connected by a first pull rope 70. A torsion spring 8 is provided between the upper connecting seat 24 and the lower connecting seat 25, which can drive the upper push rod 22 to rotate and fold relative to the lower push rod 21 when the locking pin 78 disengages from the bayonet 77. The traction member 75 includes a second pull rope 751 connected to the eccentric position of the movable block 74. The second pull rope 751 passes through the lower push rod 21. The second pull rope 751 is provided with a connecting block 752. The connecting block 752 is provided with a horizontal shaft 753. The lower connecting seat 25 is provided with a drive groove 754 for the horizontal shaft 753 to be inserted and for the second pull rope 751 to be pulled by pushing the horizontal shaft 753 through the groove wall when the upper push rod 22 rotates and folds relative to the lower push rod 21.

[0038] like Figure 1 , Figures 8 to 11As shown, when the stroller frame needs to be folded, the switch 79 is operated, and the first pull rope 70 pulls the locking pin 78 out of the opening 77 on the upper connecting seat 24. At this time, the torsion spring 8 elastically returns and pushes the upper push rod 22 to rotate relative to the lower push rod 21 to fold. During the rotation of the upper push rod 22, the groove wall of the drive groove 754 on the upper connecting seat 25 pushes the horizontal shaft 753, causing the connecting block 752 to move upward relative to the lower connecting seat 24. Then, the second pull rope 751 pulls the movable block 74 to rotate. During the rotation, the movable block 74 pushes the locking gear 73 laterally to disengage from the first slot 71. At this time, the locking device is unlocked. Under the action of gravity of the push rod assembly 2, the push rod assembly 2 automatically rotates downward and moves towards the rear support rod 11. The front support rod 14 and the rear support rod 11 are moved together through the linkage assembly 3, and the armrest 42 and the seat frame 6 are folded through the transmission rod 5 and the front connecting rod 63. During the entire folding operation, simply operate switch 79, and the torsion spring 8 will automatically drive the upper push rod 22 to rotate relative to the lower push rod 21 for folding. The push rod assembly 2 will also automatically rotate to fold the rear support rod 11. In other words, simply operating switch 79 will automatically fold the stroller frame. The folding operation is very convenient and quick, and is suitable for one-handed operation.

[0039] like Figure 3 As shown, to ensure a more stable stroller frame in the unfolded position, the armrest seat 41 is provided with a first abutment surface 43 that abuts against the third linkage rod 33 when the stroller frame is unfolded. The lower end of the push rod assembly 2 is provided with a second abutment surface 26 that abuts against the transmission rod 5 when the stroller frame is unfolded. Specifically, the second abutment surface 26 is located on the push rod seat 23. The first abutment surface 43 abuts against the third linkage rod 33, and the second abutment surface 26 abuts against the transmission rod 5, thus limiting the movement of the corresponding components and ensuring the stroller frame is securely unfolded.

[0040] like Figure 6 and Figure 7 As shown, the stroller frame is compact when folded, making it easy to carry and store in the overhead luggage compartment of an airplane. Furthermore, the armrests 42 and armrest seats 41 are directly connected to the rear support 13, providing convenient gripping for children while seated and allowing for coordinated folding when folded. The seat frame 6 features a two-section design, providing ample seating area when unfolded and enabling coordinated folding when folded, ensuring a compact overall size when folded. For added comfort, the rear frame 62 can be rotatably connected to the backrest 9 for back support. The backrest 9 is positioned using flexible textiles on the stroller frame; when the stroller is folded, the backrest 9 rotates backward and aligns with other components.

[0041] 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 rear support rod (11). The lower end of the rear support rod (11) is provided with a rear wheel (12), and the upper end of the rear support rod (11) is provided with a rear support seat (13). A front support rod (14) is rotatably connected to the rear support seat (13) around a first axis (A). A front wheel (15) is connected to the lower end of the front support rod (14). A push rod assembly (2) is rotatably connected to the bottom support frame (1) around a second axis (B). A space is also provided between the push rod assembly (2) and the bottom support frame (1). When the push rod assembly (2) rotates and folds relative to the rear support rod (11), it can drive the front support rod (14) and the rear support rod (11) to rotate and move closer together. The bottom support frame (1) is also rotatably connected to the armrest seat (41) around the third axis (C). The armrest seat (41) is connected to the armrest (42). The armrest seat (41) and the linkage assembly (3) are provided with a transmission rod (5) that can drive the armrest seat (41) and the armrest (42) to rotate and fold relative to the rear support rod (11) when the front support rod (14) and the rear support rod (11) rotate and move closer together.

2. The stroller frame according to claim 1, characterized in that: The upper end of the transmission rod (5) is rotatably connected to the armrest seat (41) around the fourth axis (D) and offset from the third axis (C). The lower end of the transmission rod (5) is rotatably connected to the linkage assembly (3).

3. The stroller frame according to claim 2, characterized in that: It also includes a seat frame (6), which includes a front frame (61) and a rear frame (62) rotatably connected to the rear end of the front frame (61) around the tenth axis (J). The middle part of the rear frame (62) is rotatably connected to the rear support (13) around the eleventh axis (K). The front side of the front frame (61) is provided with a front connecting rod (63) between the front side and the linkage assembly (3) so that the front frame (61) and the rear frame (62) can rotate and fold when the front support rod (14) and the rear support rod (11) rotate and approach each other. The upper end of the front connecting rod (63) is rotatably connected to the front frame (61) around the thirteenth axis (M), and the lower end of the front connecting rod (63) is rotatably connected to the linkage assembly (3) around the twelfth axis (L).

4. The stroller frame according to claim 3, characterized in that: The linkage assembly (3) includes a first linkage rod (31), a second linkage rod (32) and a third linkage rod (33). The front end of the first linkage rod (31) is rotatably connected to the front support rod (14) around the fifth axis (E). The rear end of the second linkage rod (32) is rotatably connected to the rear support rod (11) around the sixth axis (F). The rear end of the first linkage rod (31) is rotatably connected to the front end of the second linkage rod (32) around the seventh axis (G). The upper end of the third linkage rod (33) is rotatably connected to the push rod assembly (2) around the eighth axis (H). The lower end of the third linkage rod (33) is rotatably connected to the first linkage rod (31) or the second linkage rod (32) around the ninth axis (I). The lower ends of the transmission rod (5) and the front connecting rod (63) are rotatably connected to the first linkage rod (31).

5. The stroller frame according to any one of claims 1 to 4, characterized in that: The push rod assembly (2) and the armrest seat (41) are rotatably connected to the rear support (13) on a coaxial axis.

6. The stroller frame according to claim 4, characterized in that: The transmission rod (5), the front connecting rod (63) and the first linkage rod (31) are coaxially pivoted around the twelfth axis (L), and the push rod assembly (2), the armrest seat (41), the rear support (13) and the rear side frame (62) are coaxially pivoted.

7. The stroller frame according to any one of claims 1 to 4, characterized in that: The push rod assembly (2) includes a lower push rod (21) and an upper push rod (22) rotatably connected to the lower push rod (21). The lower end of the lower push rod (21) is provided with a push rod seat (23). The push rod seat (23) is rotatably connected to the rear support (13) around a second axis (B). The locking device includes a plurality of first slots (71) arranged along the circumferential direction on the push rod seat (23). The rear support (13) is provided with a plurality of second slots (72) arranged along the circumferential direction. The space enclosed by the push rod seat (23) and the rear support (13) is provided with a space that can move laterally within it and can engage with the first slots (71, 72, 73, 74, 75, 76, 77, 78, 79 ... 1) A locking gear (73) engages with the second slot (72) simultaneously. A movable block (74) is provided between the locking gear (73) and the push rod seat (23) and can rotate and push the locking gear (73) to disengage from the first slot (71) when rotating. A traction member (75) is provided between the movable block (74) and the upper push rod (22) and can pull the movable block (74) to rotate when the upper push rod (22) rotates and folds relative to the lower push rod (21). A reset spring (76) is also provided between the locking gear (73) and the rear support (13) and can push the locking gear (73) to move laterally and reset.

8. The stroller frame according to claim 7, characterized in that: The upper end of the lower push rod (21) is provided with an upper connecting seat (24), and the lower end of the upper push rod (22) is provided with a lower connecting seat (25) that is rotatably connected to the upper connecting seat (24). The upper connecting seat (24) is provided with a latch (77), and the lower connecting seat (25) is provided with a locking pin (78) that can engage or disengage with the latch (77). The upper push rod (22) is provided with a switch (79), and the switch (79) is connected to the locking pin (78) through a first pull rope (70). A torsion spring (8) is provided between the upper connecting seat (24) and the lower connecting seat (25) that can drive the upper push rod (22) to rotate and fold relative to the lower push rod (21) when the locking pin (78) disengages from the latch (77).

9. The stroller frame according to claim 8, characterized in that: The traction component (75) includes a second pull rope (751) connected to the eccentric position of the movable block (74). The second pull rope (751) is inserted into the lower push rod (21). The second pull rope (751) is provided with a connecting block (752). The connecting block (752) is provided with a horizontal shaft (753). The lower connecting seat (25) is provided with a drive groove (754) for inserting the horizontal shaft (753) and for pushing the horizontal shaft (753) to pull the second pull rope (751) by the groove wall when the upper push rod (22) rotates and folds relative to the lower push rod (21).

10. The stroller frame according to claim 4, characterized in that: The armrest seat (41) is provided with a first abutting surface (43) that abuts against the third linkage rod (33) when the stroller frame is unfolded, and the lower end of the push rod assembly (2) is provided with a second abutting surface (26) that abuts against the transmission rod (5) when the stroller frame is unfolded.

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