Baby stroller

Abstract

The upper ends of front legs are connected with front connecting seats, the front connecting seats are rotatably connected with rear connecting seats, the rear connecting seats are connected with rear legs, the rear connecting seats are rotatably connected with push rod seats, the push rod seats are connected with push rod assemblies, and transmission assemblies are arranged among the push rod seats, the rear connecting seats and the front connecting seats. The transmission assembly comprises a first transmission piece rotationally connected with the rear connecting base, a strip-shaped groove is formed in the push rod base, a transmission pin penetrating into the strip-shaped groove is arranged on the first transmission piece, and a second transmission piece hinged to the first transmission piece and the front connecting base is arranged between the middle of the first transmission piece and the front connecting base. The rear side of the seat supporting seat is hinged to the front connecting seat, a traction assembly is arranged between the seat supporting seat and the push rod seat, and the seat supporting seat is further connected with a seat assembly. The foldable baby carriage can be taken by children to go out in an unfolded state, and is convenient to carry or store in a folded state.

Description

[Technical field]

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

[0002] With the development of society, baby strollers have become a necessary tool for infants and young children to travel. In addition to the basic requirements of safety and stability of baby strollers, parents pay more and more attention to the characteristics of baby strollers such as easy folding, small size, and easy storage. In view of this, at present, baby strollers generally have a foldable function. The stroller is unfolded when in use and folded when not in use to facilitate carrying and reduce the occupied space. Moreover, the baby strollers on the market are various and the folding principles are not the same. The present invention provides a new implementation scheme that is different from the prior art. [Summary of the invention]

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a child stroller that can be unfolded or folded, and can be used by children for traveling in the unfolded state, and is convenient to carry or store in the folded state.

[0004] The present invention is achieved through the following technical solutions:

[0005] A stroller for children, which can be moved from an unfolded position to a folded position after a locking device is unlocked, comprises front legs, the lower ends of the front legs are connected to front wheels, the upper ends of the front legs are connected to a front connecting seat, the front connecting seat is rotatably connected to a rear connecting seat around a first axis, the rear connecting seat is connected to rear legs, the lower ends of the rear legs are connected to rear wheels, the rear connecting seat is also rotatably connected to a push rod seat around a first axis, the push rod seat is connected to a push rod assembly, a transmission assembly is provided between the push rod seat, the rear connecting seat and the front connecting seat, the transmission assembly comprises a first transmission sheet rotatably connected to the rear connecting seat around a second axis, the push rod seat is provided with a strip groove, The first transmission plate is provided with a transmission pin that penetrates into the strip groove and can cooperate with the strip groove wall to make the first transmission plate rotate around the second axis when the push rod seat rotates around the first axis. A second transmission plate is provided between the middle part of the first transmission plate and the front connecting seat, which is hinged to the two and can pull the front connecting seat to rotate closer to the rear connecting seat when the first transmission plate rotates around the second axis. The child stroller also includes a seat support seat, and the rear side of the seat support seat is hinged with the front connecting seat around a third axis. A traction assembly is provided between the seat support seat and the push rod seat, which can pull the seat support seat closer to the front leg when the push rod seat is rotated and folded relative to the rear connecting seat, and the seat support seat is also connected to the seat assembly.

[0006] The traction assembly includes a first traction piece and a second traction piece, the upper end of the first traction piece is hinged to the front side of the seat support seat around a fourth axis, the lower end of the second traction piece is hinged to the front leg or the front connecting seat around a fifth axis, the lower end of the first traction piece and the upper end of the second traction piece are hinged around a sixth axis, the traction assembly also includes a third traction piece, the front end of the third traction piece is hinged to the first traction piece and the second traction piece around the sixth axis, the rear end of the third traction piece is provided with a protruding cam shaft, the push rod seat is provided with a first arc groove in a circumferential direction for the cam shaft to penetrate, the first arc groove has a first end and a second end, when the push rod seat rotates and approaches relative to the rear connecting seat, the first end pushes the cam shaft to make the third traction piece pull the first traction piece and the second traction piece to move.

[0007] A second arc-shaped groove for the convex shaft to penetrate is provided on the front connecting seat along the circumferential direction, and the second arc-shaped groove has a front end and a rear end. When the push rod seat is in a relatively expanded state relative to the rear connecting seat, the space enclosed by the front end and the second end clamps the convex shaft. During the process of the push rod seat rotating and approaching relative to the rear connecting seat, the front end and the second end release the convex shaft and the first end pushes the convex shaft to move the third traction plate.

[0008] The front connecting seat, the rear connecting seat and the push rod seat are rotatably connected to each other around a first axis through a connecting shaft, and an arc-shaped clearance groove for the connecting shaft to penetrate is provided on the first transmission plate.

[0009] The push rod assembly comprises a lower push rod fixed on a push rod seat, wherein an upper push rod capable of sliding and telescoping inside the lower push rod is arranged inside the lower push rod.

[0010] The locking device includes a first slot provided on the push rod seat and a second slot provided on the front connecting seat, a card rod is inserted in the first slot and the second slot, the push rod seat is also provided with a first makeshift space communicating with the first slot, the front connecting seat is provided with a second makeshift space communicating with the second slot, the push rod seat is provided with a pushing seat capable of pushing the card rod out of the first slot and the second slot and allowing the card rod to enter the first makeshift space and the second makeshift space, when the push rod seat rotates closer to the rear connecting seat, the card rod is in the first makeshift space and the second makeshift space and the pushing seat is separated from the card rod, both ends of the card rod are slidably connected to the rear connecting seat, and a first return spring capable of pushing the push seat to return to its original position is provided between the push rod seat and the pushing seat.

[0011] The lower end of the upper push rod is provided with a pushing portion which can push the pushing seat when it slides in the downward push rod. The rear connecting seat is provided with a sliding groove. Both ends of the clamping rod are connected with sliding blocks which can slide in the sliding groove. The sliding groove is also provided with a second reset spring which can push the sliding block to move and reset.

[0012] The push seat is provided with an insertion groove for the card rod to be inserted and pushed. The push seat is also provided with an opening which is communicated with the insertion groove and can allow the card rod to enter when the push rod seat rotates and unfolds relative to the rear connecting seat. The opening has an inclined slanted wall.

[0013] The seat assembly comprises a seat plate connected to a seat support seat, and the seat plate is connected with a backrest and an armrest which can be rotated, unfolded or folded relative to the seat plate.

[0014] A handle is provided at the rear end of the seat support base.

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

[0016] 1. When the child stroller of the present invention is folded, the push rod assembly is rotated backward, and the push rod seat is rotated relative to the rear connecting seat. During the rotation process, the groove wall of the strip groove on the push rod seat pushes the transmission pin, thereby pushing the first transmission plate to rotate relative to the rear connecting seat. During the rotation process, the first transmission plate pulls the second transmission plate, and the second transmission plate pulls the front connecting seat to rotate relative to the rear connecting seat, so that the front legs rotate and approach the rear legs, and in this process, the traction assembly pulls the seat support seat to rotate and approach the seat assembly to the front legs, thereby realizing the folding operation of the entire child stroller. The entire child stroller has a simple structure and is easy to fold. It only needs to rotate the push rod assembly backward, and it is flexible to fold and close.

[0017] 2. During the process of the push rod seat of the present invention rotating and approaching relative to the rear connecting seat, the first end of the first arc-shaped groove on the push rod seat pushes the convex shaft, thereby pushing the third traction piece to move rearward, and the third traction piece pulls the connecting position of the first traction piece and the second traction piece backward, so that the first traction piece and the second traction piece rotate relative to the seat support seat and the front leg or the front connecting seat respectively, so that the seat support seat rotates with the seat assembly relative to the front connecting seat and approaches the front leg. The entire traction structure is simple and compact, and the movement is smooth and reliable, so that the child stroller can be flexibly folded or unfolded.

[0018] 3. The present invention has a simple structure, is easy to fold and operate, is flexible to fold, is easy to carry after folding, and is suitable for promotion and application.

Brief Description of the Drawings

[0019] Figure 1 It is a stereogram of the present invention;

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

[0021] Figure 3 yes Figure 2 Enlarged view at G in the middle;

[0022] Figure 4 is a perspective view of the components of the present invention;

[0023] Figure 5 is one of the partial cross-sectional views of the present invention in the unfolded state;

[0024] Figure 6 It is one of the partial cross-sectional views of the present invention during the folding process;

[0025] Figure 7 This is the second partial cross-sectional view of the present invention during the folding process;

[0026] Figure 8 is the second partial cross-sectional view of the present invention in the unfolded state;

[0027] Fig. 9 It is the third partial cross-sectional view of the present invention in the unfolded state;

[0028] Fig.10 is an exploded view of the components of the present invention. [Specific implementation method]

[0029] The present invention will be further described below in conjunction with the accompanying drawings:

[0030] like Figures 1 to 9 As shown, a child stroller includes a front leg 11, the lower end of the front leg 11 is connected to a front wheel 1a, the upper end of the front leg 11 is connected to a front connecting seat 12, the front connecting seat 12 is rotatably connected to a rear connecting seat 22 around a first axis A, the rear connecting seat 22 is connected to a rear leg 21, the lower end of the rear leg 21 is connected to a rear wheel 2a, the rear connecting seat 22 is also rotatably connected to a push rod seat 3 around the first axis A, the push rod seat 3 is connected to a push rod assembly 4 for pushing, the push rod assembly 4 includes a lower push rod 41 fixed to the push rod seat 3, the lower push rod 41 is provided with an upper push rod 42 that can slide and retract therein.

[0031] like Figures 1 to 9 As shown, the child stroller further comprises a seat support seat 6 which is hinged to the front connecting seat 12 around a third axis C at the rear side and can rotate relative to the front connecting seat 12 , and a seat assembly 8 is also connected to the seat support seat 6 .

[0032] like Figures 1 to 9As shown, when the child stroller is folded, the push rod assembly 4 will rotate backward and approach the rear leg 21, and the front leg 11 will also rotate and approach the rear leg 12, and the seat support seat 6 will bring the seat assembly 8 to rotate and approach the front leg 11. In this embodiment, the seat assembly 8 includes a seat plate 81 connected to the seat support seat 6, and the seat plate 81 is connected with a backrest 82 and an armrest 83 that can be rotated to unfold or fold relative to the seat plate 81. When the child stroller is folded, the backrest 82 and the armrest 83 are first rotated to approach the seat plate 81, and the folding structure between the backrest 82 and the armrest 83 and the seat plate 81 can adopt a traditional folding mechanism, which will not be repeated here.

[0033] like Figures 1 to 9 As shown, in order to ensure the flexible folding of the child stroller, a transmission assembly is provided between the push rod seat 3, the rear connecting seat 22 and the front connecting seat 12, and the transmission assembly includes a first transmission plate 51 rotatably connected to the rear connecting seat 22 around the second axis B, the push rod seat 3 is provided with a strip groove 52, the first transmission plate 51 is provided with a transmission pin 53 which penetrates into the strip groove 52 and can cooperate with the groove wall of the strip groove 52 when the push rod seat 3 rotates around the first axis A to rotate the first transmission plate 51 around the second axis B, and a second transmission plate 54 which is hinged to the middle part of the first transmission plate 51 and the front connecting seat 12 and can pull the front connecting seat 12 to rotate relative to the rear connecting seat 22 when the first transmission plate 51 rotates around the second axis B is provided. When the push rod assembly 4 rotates backward, the push rod seat 3 rotates around the first axis A relative to the rear connecting seat 22. During the rotation, the groove wall of the strip groove 52 on the push rod seat 3 pushes the transmission pin 53, thereby pushing the first transmission plate 51 to rotate around the second axis B relative to the rear connecting seat 22. During the rotation, the first transmission plate 51 pulls the second transmission plate 54, and the second transmission plate 54 rotates relative to the first transmission plate 51 and the front connecting seat 12, and the second transmission plate 54 pulls the front connecting seat 12 to rotate around the first axis A relative to the rear connecting seat 22, thereby causing the front leg 11 to rotate closer to the rear leg 21, thereby achieving the push rod assembly 4 and the front leg 11 being close to the rear leg 21, and the folding action is flexible and convenient.

[0034] like Figures 1 to 9As shown, in order to realize the seat support seat 6 and the seat assembly 8 to move closer to the front leg 11 during the process of the push rod assembly 4 and the front leg 11 moving closer to the rear leg 21, a traction assembly 7 is provided between the seat support seat 6 and the push rod seat 3, which can pull the seat support seat 6 to move closer to the front leg 11 when the push rod seat 3 is rotated and folded relative to the rear connecting seat 22. The traction assembly 7 includes a first traction piece 71 and a second traction piece 72. The upper end of the first traction piece 71 is hinged to the front side of the seat support seat 6 around the fourth axis D, and the lower end of the second traction piece 72 is hinged to the front leg 11 or the front connecting seat 12 around the fifth axis E. The lower end of the first traction piece 71 and the second traction piece 72 are hinged to the front leg 11 or the front connecting seat 12 around the fifth axis E. The upper end of 72 is hinged around the sixth axis F, and the traction assembly 7 also includes a third traction piece 73. The front end of the third traction piece 73 is hinged with the first traction piece 71 and the second traction piece 72 around the sixth axis F. The rear end of the third traction piece 73 is provided with a protruding convex shaft 74. The push rod seat 3 is provided with a first arc groove 75 for the convex shaft 74 to penetrate along the circumferential direction. The first arc groove 75 has a first end 751 and a second end 752. When the push rod seat 3 rotates and approaches the rear connecting seat 22, the first end 751 pushes the convex shaft 74 to make the third traction piece 73 pull the first traction piece 71 and the second traction piece 72 to move. Therefore, during the backward rotation of the push rod assembly 4, when the push rod assembly 4 rotates to a certain angle, the first end 751 of the first arc-shaped groove 75 pushes the convex shaft 74, thereby causing the third traction piece 73 to move backward, and the third traction piece 73 pulls the first traction piece 71 and the second traction piece 72 to connect to each other, so that the first traction piece 71 and the second traction piece 72 rotate relative to the seat support seat 6 and the front leg 11 or the front connecting seat 12 respectively, so that the seat support seat 6 rotates with the seat assembly 8 relative to the front connecting seat 12 and moves closer to the front leg 11. The entire traction assembly 7 is simple and compact, and the movement is smooth and reliable. During the rotation and folding process of the push rod assembly 4, the seat assembly 8 is linked to fold, making the folding operation of the child stroller convenient and quick.

[0035] like Figures 5 to 10 As shown, the front connecting seat 12 is provided with a second arc groove 76 for the convex shaft 74 to penetrate along the circumferential direction, and the second arc groove 76 has a front end 761 and a rear end 762. When the push rod seat 3 is in a relatively unfolded state relative to the rear connecting seat 22, the space surrounded by the front end 761 and the second end 752 clamps the convex shaft 74, thereby limiting the third transmission plate 73 to ensure that the child stroller is stable and reliable in the unfolded state. During the process of the push rod seat 3 rotating and approaching relative to the rear connecting seat 22, the front end 761 and the second end 752 release the convex shaft 74 and the first end 751 pushes the convex shaft 75 to move the third traction plate 73, thereby causing the third traction plate 73 to pull the seat support seat 6 and the seat assembly 8 to fold through the first traction plate 71 and the second traction plate 72.

[0036] like Figure 5 and Figure 6 As shown, the front connecting seat 12, the rear connecting seat 22 and the push rod seat 3 are rotatably connected to each other around the first axis A through the connecting shaft 10, and the first transmission plate 51 is provided with an arc-shaped clearance groove 55 for the connecting shaft 10 to penetrate, ensuring that the first transmission plate 51 will not interfere with the connecting shaft 10 when rotating relative to the rear connecting seat 22, ensuring that the folding action can be completed reliably.

[0037] like Figure 5 , Figure 8 and Fig.10 As shown, the stroller also has a locking device. After the locking device is unlocked, the push rod assembly 4 can be rotated backward to move the stroller from the unfolded position to the folded position. The locking device can adopt a variety of locking structures used in traditional stroller structures. In this embodiment, a new locking structure is provided. In this embodiment, the locking device includes a first card slot 91 provided on the push rod seat 3 and a second card slot 92 provided on the front connecting seat 12. A card rod 93 is inserted into the first card slot 91 and the second card slot 92. The push rod seat 3 is also provided with a first clearance space 94 that communicates with the first card slot 91. The front connecting seat 12 is provided with a second clearance space 95 that communicates with the second card slot 92. The push rod seat 3 is provided with a card rod 93 that can push the card rod 93 out of the first card slot 91. The card slot 91 and the second card slot 92 allow the card rod 93 to enter the first make way space 94 and the second make way space 95 of the pushing seat 96. The lower end of the upper push rod 42 is provided with a pushing portion 43 which can push the pushing seat 96 when it slides in the downward push rod 41. When the push rod seat 3 rotates and approaches the rear connecting seat 22, the card rod 93 is in the first make way space 94 and the second make way space 95 and the pushing seat 96 is separated from the card rod 93. The two ends of the card rod 93 are slidably connected to the rear connecting seat 22. A first return spring 97 which can push the pushing seat 96 to return to its original position is provided between the push rod seat 3 and the pushing seat 96. When the child stroller needs to be folded, the upper push rod 42 slides downward, the push portion 43 pushes the push seat 96, the push seat 96 pushes the clamping rod 93 out of the first clamping groove 91 and the second clamping groove 92, and the clamping rod 93 enters the first clearance space 94 and the second clearance space 95. At this time, the locking device is unlocked, and the push rod assembly 4 can rotate backward. During the rotation process, the push seat 96 is separated from the clamping rod 93, and the push seat 96 rotates relative to the rear connecting seat 22 together with the push rod seat 3 and the push rod assembly 4, thereby realizing the folding of the child stroller. The first clearance space 94 and the second clearance space 95 are set so that the push rod seat 3 and the front connecting seat 12 will not collide with the clamping rod 93 when rotating.

[0038] like Fig.10As shown, the rear connecting seat 22 is provided with a slide groove 98, and the two ends of the clamping rod 93 are connected with sliders 99 that can slide in the slide groove 98. The slide groove 98 is also provided with a second return spring 90 that can push the slider 99 to move and return. When the push seat 96 pushes the clamping rod 93, the clamping rod 93 slides relative to the rear connecting seat 22 together with the slider 99, ensuring that the clamping rod 93 moves reliably.

[0039] like Fig. 9 and Fig.10 As shown, the push seat 96 is provided with an insertion groove 961 for the card rod 93 to be inserted and can push the card rod 93. The push seat 96 is also provided with an opening 962 that is communicated with the insertion groove 961 and can allow the card rod 93 to enter when the push rod seat 3 rotates and unfolds relative to the rear connecting seat 22. The opening 962 has an inclined wall 963. When the push seat 96 slides downward, the groove wall of the insertion groove 961 pushes the card rod 93 to move downward, so that the card rod 93 is separated from the first card groove 91 and the second card groove 92. When the card rod 93 enters the first clearance space 94 and the second clearance space 95, the card rod 93 withdraws from the opening 962 as the push rod seat 3 rotates. When the stroller needs to be unfolded, the push rod seat 3 rotates in the opposite direction, and the inclined wall 963 touches the latch rod 93 to guide the latch rod 93 into the insertion groove 961, and the latch rod 93 is finally reset to the first latch groove 91 and the second latch groove 92 under the action of the first reset spring 97 and the second reset spring 90.

[0040] like Figure 1 As shown, the rear end of the seat support seat 6 is provided with a handle 61. After the locking device is unlocked, the handle 61 can be lifted upward, and the push rod assembly 4 can rotate backward and approach the rear leg 21 under the action of gravity. In this process, the front leg 11 and the seat support seat 6 and the seat assembly 8 also rotate and approach the front leg 11 through the action of the transmission assembly and the traction assembly 7. Therefore, it is only necessary to slide the upper push rod 42 downward to hit the push seat 96, and then lift the handle 61 upward, and the folding operation is very convenient and quick.

[0041] 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 that can be moved from an unfolded position to a folded position after a locking device is unlocked, characterized in that: The invention comprises a front leg (11), wherein the lower end of the front leg (11) is connected to a front wheel (1a), the upper end of the front leg (11) is connected to a front connecting seat (12), the front connecting seat (12) is rotatably connected to a rear connecting seat (22) around a first axis (A), the rear connecting seat (22) is connected to a rear leg (21), the lower end of the rear leg (21) is connected to a rear wheel (2a), the rear connecting seat (22) is also rotatably connected to a push rod seat (3) around the first axis (A), the push rod seat (3) is connected to a push rod assembly (4), a transmission assembly is provided between the push rod seat (3), the rear connecting seat (22) and the front connecting seat (12), the transmission assembly comprises a first transmission plate (51) rotatably connected to the rear connecting seat (22) around a second axis (B), the push rod seat (3) is provided with a strip groove (52), the first transmission plate (51) is provided with a strip groove (52) for penetrating into the strip groove (52) and a transmission pin (53) which can cooperate with the groove wall of the strip groove (52) to rotate the first transmission plate (51) around the second axis (B) when the push rod seat (3) rotates around the first axis (A); a second transmission plate (54) is provided between the middle part of the first transmission plate (51) and the front connecting seat (12), which is hinged to the two and can pull the front connecting seat (12) to rotate and move closer to the rear connecting seat (22) when the first transmission plate (51) rotates around the second axis (B); the child stroller also includes a seat support seat (6), the rear side of the seat support seat (6) is hinged to the front connecting seat (12) around the third axis (C); a traction component (7) is provided between the seat support seat (6) and the push rod seat (3), which can pull the seat support seat (6) to move closer to the front leg (11) when the push rod seat (3) is rotated and folded relative to the rear connecting seat (22); and a seat component (8) is also connected to the seat support seat (6).

2. The baby stroller according to claim 1, characterized in that: The traction assembly (7) comprises a first traction piece (71) and a second traction piece (72), the upper end of the first traction piece (71) being hinged to the front side of the seat support seat (6) around a fourth axis (D), the lower end of the second traction piece (72) being hinged to the front leg (11) or the front connecting seat (12) around a fifth axis (E), the lower end of the first traction piece (71) and the upper end of the second traction piece (72) being hinged around a sixth axis (F), and the traction assembly (7) further comprises a third traction piece (73), the front end of the third traction piece (73) being hinged to the front side of the seat support seat (6) around the sixth axis (F). The first traction piece (71) and the second traction piece (72) are hinged, and the rear end of the third traction piece (73) is provided with a protruding convex shaft (74). The push rod seat (3) is provided with a first arc groove (75) along the circumferential direction for the convex shaft (74) to penetrate, and the first arc groove (75) has a first end (751) and a second end (752). When the push rod seat (3) rotates and approaches relative to the rear connecting seat (22), the first end (751) pushes the convex shaft (74) so ​​that the third traction piece (73) pulls the first traction piece (71) and the second traction piece (72) to move.

3. The stroller according to claim 2, characterized in that: A second arcuate groove (76) is provided on the front connecting seat (12) along the circumferential direction for the convex shaft (74) to penetrate therethrough. The second arcuate groove (76) has a front end portion (761) and a rear end portion (762). When the push rod seat (3) is in a relatively expanded state relative to the rear connecting seat (22), the space enclosed by the front end portion (761) and the second end (752) clamps the convex shaft (74). When the push rod seat (3) rotates and approaches the rear connecting seat (22), the front end portion (761) and the second end (752) release the convex shaft (74) and the first end (751) pushes the convex shaft (75) to move the third traction plate (73).

4. The baby stroller according to claim 1, characterized in that: The front connecting seat (12), the rear connecting seat (22) and the push rod seat (3) are rotatably connected to each other around a first axis (A) via a connecting shaft (10), and an arc-shaped clearance groove (55) for the connecting shaft (10) to penetrate is provided on the first transmission plate (51).

5. The baby stroller according to any one of claims 1 to 4, characterized in that: The push rod assembly (4) comprises a lower push rod (41) fixed on the push rod seat (3), and an upper push rod (42) is arranged inside the lower push rod (41) and can slide and retract inside the lower push rod.

6. The stroller according to claim 5, characterized in that: The locking device comprises a first card slot (91) provided on the push rod seat (3) and a second card slot (92) provided on the front connecting seat (12); a card rod (93) is inserted into the first card slot (91) and the second card slot (92); the push rod seat (3) is also provided with a first clearance space (94) communicating with the first card slot (91); the front connecting seat (12) is provided with a second clearance space (95) communicating with the second card slot (92); the push rod seat (3) is provided with a card slot capable of pushing the card rod (93) out of the first card slot (91) and the second card slot (92); The slot (92) allows the clamping rod (93) to enter the first clearance space (94) and the push seat (96) of the second clearance space (95). When the push rod seat (3) rotates and approaches relative to the rear connecting seat (22), the clamping rod (93) is in the first clearance space (94) and the second clearance space (95) and the push seat (96) is separated from the clamping rod (93). The two ends of the clamping rod (93) are slidably connected to the rear connecting seat (22). A first return spring (97) is provided between the push rod seat (3) and the push seat (96) to return to its original position.

7. The stroller according to claim 6, characterized in that: The lower end of the upper push rod (42) is provided with a pushing portion (43) which can push the pushing seat (96) when it slides in the downward push rod (41), the rear connecting seat (22) is provided with a sliding groove (98), and the two ends of the clamping rod (93) are connected with a sliding block (99) which can slide in the sliding groove (98), and the sliding groove (98) is also provided with a second return spring (90) which can push the sliding block (99) to move and return.

8. The stroller according to claim 6, characterized in that: The push seat (96) is provided with an insertion groove (961) for the clamping rod (93) to be inserted and capable of pushing the clamping rod (93). The push seat (96) is also provided with an opening (962) which is communicated with the insertion groove (961) and can allow the clamping rod (93) to enter when the push rod seat (3) is rotated and unfolded relative to the rear connecting seat (22). The opening (962) has an inclined slanted wall (963).

9. The baby stroller according to claim 1, characterized in that: The seat assembly (8) comprises a seat plate (81) connected to a seat support seat (6); the seat plate (81) is connected to a backrest (82) and an armrest (83) which can be rotated, unfolded or folded relative to the seat plate.

10. The baby stroller according to claim 1, characterized in that: The rear end of the seat support base (6) is provided with a handle (61).

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