Baby stroller

Abstract

The utility model discloses a child stroller which comprises front legs (11), rear legs (12) are rotatably connected to the front legs (11) around a first axis (A), a supporting rod (13) is rotatably connected to the rear legs (12) around a second axis (B), a push rod (14) is rotatably connected to the supporting rod (13) around a third axis (C), and a seat rod (2) is rotatably connected to the front legs (11) around a fourth axis (D). A transmission assembly (3) is arranged between the seat rod (2) and the push rod (14), the transmission assembly (3) can enable the supporting rod (13) to be close to the rear legs (12), the front legs (11) to be close to the rear legs (12) and the seat rod (2) to be close to the rear legs (12) when the push rod (14) rotates around a third axis (C) relative to the supporting rod (13), the front legs (11) are connected with front wheels (111), and the rear legs (12) are connected with rear wheels (121). The folding chair is simple in structure, convenient to fold and small in size after being folded.

Description

[Technical field]

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

[0002] At present, baby strollers have become an indispensable item for children in their growth process. Baby strollers on the market can generally be folded or unfolded, but the existing baby strollers have a complex transmission structure, many connecting rods, and are still large in size after folding. Therefore, people are very eager for a baby stroller that is easy to fold and unfold. The utility model provides a new baby stroller structure. [Utility Model Content]

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a child stroller which has a simple structure, is convenient to fold and has a small volume after being folded.

[0004] The utility model is realized by the following technical solutions:

[0005] A child stroller, which can be moved from an unfolded state to a folded state after a locking device is unlocked, comprises a front leg 11, wherein the front leg 11 is connected to a rear leg 12 rotatably around a first axis A, the rear leg 12 is connected to a support rod 13 rotatably around a second axis B, the support rod 13 is connected to a push rod 14 rotatably around a third axis C, the front leg 11 is connected to a seat rod 2 rotatably around a fourth axis D, a transmission assembly 3 is provided between the seat rod 2 and the push rod 14, which can make the support rod 13 move closer to the rear leg 12, the front leg 11 move closer to the rear leg 12, and the seat rod 2 move closer to the rear leg 12 when the push rod 14 rotates around the third axis C relative to the support rod 13, the front leg 11 is connected to a front wheel 111, and the rear leg 12 is connected to a rear wheel 121.

[0006] The transmission assembly 3 includes a first transmission rod 31 connected between the push rod 14 and the rear leg 12. The upper end of the first transmission rod 31 is rotatably connected to the push rod 14 around a fifth axis E. The lower end of the first transmission rod 31 is fixedly connected to a second transmission rod 32 extending forward. The rear side of the second transmission rod 32 is rotatably connected to the rear leg 12 around a sixth axis F. The front end of the second transmission rod 32 is rotatably connected to the rear end of the seat rod 2 around a seventh axis G.

[0007] The push rod 14 includes a push rod body 141 and a connecting portion 142 disposed on the push rod body 141 and protruding downward relative to the push rod body 141. The upper end of the first transmission rod 31 is rotatably connected to the connecting portion 142 around the fifth axis E, and the push rod body 141 is rotatably connected to the support rod 13 around the third axis C.

[0008] The second transmission rod 32 is L-shaped, and includes a second straight segment 321 and a second bent segment 322 bent relative to the second straight segment 321. The second straight segment 321 is rotationally connected to the seat rod 2 around the seventh axis G, and the second bent segment 322 is fixedly connected to the first transmission rod 31.

[0009] The rear leg 12 is also detachably connected to an armrest assembly 15, the rear leg 12 is provided with a locking position 122, the armrest assembly 15 is provided with a movable part 151 that can produce elastic deformation, the movable part 151 is provided with a locking part 152 that can be engaged in or disengaged from the locking position 122, and the movable part 151 is provided with an operating part 153 that can be operated to cause the movable part 151 to elastically deform.

[0010] The support rod 13 is arranged between the front leg 11 and the rear leg 12, and the rear leg 12 is provided with a positioning protrusion 123 which protrudes laterally and extends into the front leg 11 and the support rod 13 in sequence, and the support rod 13 is provided with a first positioning groove 131 in which the positioning protrusion 123 can move and cooperate with the positioning protrusion 123 to abut when the child stroller is in a folded state or an unfolded state, and the front leg 11 is provided with a second positioning groove 112 in which the positioning protrusion 123 can move and cooperate with the positioning protrusion 123 to abut when the child stroller is in a folded state or an unfolded state.

[0011] The locking device includes a locking assembly 4 arranged between the push rod 14 and the support rod 13, the locking assembly 4 includes an inner rotating shell 41 arranged on the push rod 14 and an outer rotating shell 42 arranged on the support rod 13, a first activity space 43 is surrounded by the inner rotating shell 41 and the outer rotating shell 42, the inner rotating shell 41 and the outer rotating shell 42 are both provided with a first spline groove 44, a first activity space 43 is provided with a first spline 45 that can move relative to it, a first elastic element 46 is provided between the first spline 45 and the inner rotating shell 41, which can enable the first spline 45 to engage with the first spline grooves 44 on the inner rotating shell 41 and the outer rotating shell 42 at the same time, a first pushing piece 47 is provided between the first spline 45 and the push rod 14, which can push the first spline 45 to slide horizontally and disengage from the first spline groove 44 of the outer rotating shell 42 when active, a first operating piece 48 is provided on the push rod 14, and a first cable 49 is provided between the first operating piece 48 and the first pushing piece 47.

[0012] The first transmission rod 31 is also provided with a backrest 5 that can be rotated and folded relative to it, and a locking component 6 that can lock the backrest 5 and the first transmission rod 31 is provided between the backrest 5 and the first transmission rod 31. The locking component 6 includes an inner shell 61 provided on the backrest 5, an outer shell 62 is provided on the first transmission rod 31, and a second activity space 63 is surrounded between the inner shell 61 and the outer shell 62. The inner shell 61 and the outer shell 62 are both provided with a second spline groove 64, and the second activity space 63 is provided with a A second spline 65, a second elastic element 66 is provided between the second spline 65 and the inner shell 61, which can enable the second spline 65 to engage with the second spline grooves 64 on the inner shell 61 and the outer shell 62 at the same time, a second pushing member 67 is provided between the second spline 65 and the outer shell 62, which can push the second spline 65 to slide horizontally and disengage from the second spline groove 64 of the outer shell 62 when moving, a second operating member 68 is provided on the backrest 5, and a second cable 69 is provided between the second operating member 68 and the second pushing member 67.

[0013] The front wheel 111 is detachably connected to the front leg 11, and the rear wheel 121 is detachably connected to the rear leg 12. The lower end of the push rod 14 is provided with a support rod 7 that can move relative to it. When the child stroller is in a folded state, the support rod 7 can be movably unfolded relative to the push rod 14 and can cooperate with the rear wheel 121 to keep the folded child stroller standing.

[0014] A positioning structure is provided between the support rod 7 and the push rod 14, and the positioning structure includes a clamping groove 81 provided on the push rod 14, and a clamping portion 82 is provided on the support rod 7, which can be engaged with or disengaged from the clamping groove 81 after it slides relative to the push rod 14, and a strip hole 83 is provided on the support rod 7, and a connecting shaft 84 is provided on the push rod 14, which passes through the strip hole 83 and can be used for the support rod 7 that is disengaged from the clamping groove 81 to rotate around, and a reset spring 85 is provided between the connecting shaft 84 and the hole wall of the strip hole 83. When the support rod 7 is supported on the ground, the clamping portion 82 is engaged with the clamping groove 81.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. When the stroller needs to be folded, the locking device is first unlocked, and then the push rod is pushed to rotate relative to the support rod around the third axis C and move closer to the support rod. When the push rod rotates, it drives the transmission assembly to move, and the transmission assembly can drive the support rod to rotate relative to the rear legs around the second axis B and move closer to the rear legs, and drive the seat rod to rotate relative to the front legs around the fourth axis D and move closer to the rear legs. Under the cooperation of the seat rod and the transmission assembly, the front legs rotate relative to the rear legs around the first axis A and move closer to the rear legs. The entire stroller has a simple structure, the folding operation is very convenient and quick, and it occupies little space after folding.

[0017] 2. When the push rod rotates around the third axis C relative to the support rod, the push rod drives the first transmission rod to move, and the first transmission rod rotates around the fifth axis E relative to the push rod. At the same time, the second transmission rod fixed on the first transmission rod also rotates around the sixth axis F relative to the rear leg. The front end of the second transmission rod tilts upward and rotates around the seventh axis G relative to the rear end of the seat rod. At this time, the seat rod is driven to rotate around the fourth axis D relative to the front leg. Driven by the seat rod, the front leg gradually moves toward the rear leg and folds. The entire child stroller is flexible to fold and easy to fold, and is suitable for popularization and application.

Brief Description of the Drawings

[0018] Figure 1 It is a three-dimensional diagram of the utility model baby stroller;

[0019] Figure 2 It is a side view of the child stroller of the utility model;

[0020] Figure 3 It is a cross-sectional view of the utility model baby stroller;

[0021] Figure 4 This is one of the exploded views of the locking assembly in the child stroller of the utility model;

[0022] Figure 5 This is the second exploded view of the locking assembly in the child stroller of the utility model;

[0023] Figure 6 It is a three-dimensional diagram of the first spline in the child stroller of the utility model;

[0024] Figure 7 It is a three-dimensional diagram of a seat bar and a backrest in the child stroller of the utility model;

[0025] Figure 8 It is one of the exploded views of the components of the child stroller of the utility model;

[0026] Fig. 9 yes Figure 8 The enlarged view of the M in the middle;

[0027] Fig.10 This is the second exploded view of the components of the child stroller of the utility model;

[0028] Fig.11 It is a three-dimensional diagram of the second spline in the child stroller of the utility model;

[0029] Fig.12 It is a cross-sectional view of the armrest assembly in the child stroller of the utility model;

[0030] Fig.13 It is a three-dimensional diagram of the armrest assembly in the child stroller of the utility model;

[0031] Fig.14 It is one of the exploded views of the front legs, push rod and rear legs in the utility model stroller;

[0032] Fig.15 This is the second exploded view of the front legs, push rod and rear legs of the child stroller of the utility model;

[0033] Fig.16 This is a state diagram of the utility model baby stroller during folding;

[0034] Fig.17 It is a cross-sectional view of the utility model stroller during the folding process;

[0035] Fig.18 It is a schematic diagram of the utility model baby stroller in a folded state;

[0036] Fig.19 It is a cross-sectional view of components of the child stroller of the present utility model. [Specific implementation method]

[0037] The utility model is further described below in conjunction with the accompanying drawings:

[0038] like Figures 1 to 17 As shown, the utility model provides a child stroller, which can be moved from an unfolded state to a folded state after a locking device is unlocked, and includes a front leg 11, a rear leg 12 is rotatably connected to the front leg 11 around a first axis A, a support rod 13 is rotatably connected to the rear leg 12 around a second axis B, a push rod 14 is rotatably connected to the support rod 13 around a third axis C, a seat rod 2 is rotatably connected to the front leg 11 around a fourth axis D, a transmission component 3 is provided between the seat rod 2 and the push rod 14, which can make the support rod 13 move closer to the rear leg 12, the front leg 11 move closer to the rear leg 12, and the seat rod 2 move closer to the rear leg 12 when the push rod 14 rotates around the third axis C relative to the support rod 13, the front leg 11 is connected to a front wheel 111, and the rear leg 12 is connected to a rear wheel 121.

[0039] When the stroller needs to be folded, the locking device is first unlocked, and then the push rod 14 is pushed to rotate relative to the support rod 13 around the third axis C and move closer to the support rod 13. When the push rod 14 rotates, it drives the transmission assembly 3 to move, and the transmission assembly 3 can drive the support rod 13 to rotate relative to the rear leg 12 around the second axis B and move closer to the rear leg 12, and drive the seat rod 2 to rotate relative to the front leg 11 around the fourth axis D and move closer to the rear leg 12. Under the cooperation of the seat rod 2 and the transmission assembly 3, the front leg 11 rotates relative to the rear leg 12 around the first axis A and moves closer to the rear leg 12. The entire stroller has a simple structure, a small volume after folding, and a very convenient and quick folding operation.

[0040] like Figures 1 to 3 , Fig.16 and Fig.17 As shown, the transmission assembly 3 includes a first transmission rod 31 connected between the push rod 14 and the rear leg 12, the upper end of the first transmission rod 31 is rotatably connected to the push rod 14 around the fifth axis E, the lower end of the first transmission rod 3 is fixedly connected to a second transmission rod 32 extending forward, the rear side of the second transmission rod 32 is rotatably connected to the rear leg 12 around the sixth axis F, and the front end of the second transmission rod 32 is rotatably connected to the rear end of the seat rod 2 around the seventh axis G. When the push rod 14 rotates around the third axis C relative to the support rod 13, the push rod 14 drives the first transmission rod 31 to move, and the first transmission rod 31 rotates around the fifth axis E relative to the push rod 14. At the same time, the second transmission rod 32 fixedly connected to the first transmission rod 31 rotates around the sixth axis F relative to the rear leg 12, and the front end of the second transmission rod 32 tilts upward and rotates around the seventh axis G relative to the rear end of the seat rod 2. At this time, the seat rod 2 is driven to rotate around the fourth axis D relative to the front leg 11. Driven by the seat rod 2, the front leg 11 gradually moves toward the rear leg 12 and folds. The entire folding action is flexible and the folding operation is convenient. You only need to push the push rod 14 forward to rotate and press it down. Moreover, the folded volume is small and can be carried in the trunk of a car or the luggage rack of an airplane.

[0041] like Figure 3 and Fig.16 As shown, the push rod 14 includes a push rod body 141 and a connecting portion 142 disposed on the push rod body 141 and protruding downward relative to the push rod body 141, the upper end of the first transmission rod 31 is connected to the connecting portion 142 for rotation around the fifth axis E, and the push rod body 141 is connected to the support rod 13 for rotation around the third axis C. The connecting portion 142, the first transmission rod 31 and the rear leg 12 cooperate with each other, so that when the push rod 14 rotates and folds relative to the support rod 13, the support rod 13 can be driven to fold closer to the rear leg 12.

[0042] like Figures 4 to 6As shown, the locking device includes a locking assembly 4 arranged between the push rod 14 and the support rod 13, the locking assembly 4 includes an inner rotating shell 41 arranged on the push rod 14 and an outer rotating shell 42 arranged on the support rod 13, a first activity space 43 is surrounded by the inner rotating shell 41 and the outer rotating shell 42, the inner rotating shell 41 and the outer rotating shell 42 are both provided with a first spline groove 44, a first activity space 43 is provided with a first spline 45 that can move relative to it, a first elastic element 46 is provided between the first spline 45 and the inner rotating shell 41, which can enable the first spline 45 to engage with the first spline grooves 44 on the inner rotating shell 41 and the outer rotating shell 42 at the same time, a first pushing piece 47 is provided between the first spline 45 and the push rod 14, which can push the first spline 45 to slide horizontally and disengage from the first spline groove 44 of the outer rotating shell 42 when active, a first operating piece 48 is provided on the push rod 14, and a first cable 49 is provided between the first operating piece 48 and the first pushing piece 47.

[0043] When the stroller needs to be folded, the locking assembly 4 needs to be unlocked first and the first operating member 48 needs to be operated. After the first operating member 48 is operated, the first cable 49 is driven to move. When the first cable 49 is active, the first pushing member 47 is driven to move and the first pushing member 47 pushes the first spline 45 to slide horizontally between the inner rotating shell 41 and the outer rotating shell 42. The first spline 45 gradually disengages from the first spline groove 44 on the outer rotating shell 42 and completely enters the inner rotating shell 41. At this time, the locking assembly 4 is unlocked and the entire stroller can be folded.

[0044] like Figure 4 As shown, the first pushing member 47 is provided with a plurality of first pushing protrusions 471, the first pushing protrusions 471 are provided with a first pushing surface 472, the first spline 45 is provided with a first receiving groove 451 capable of receiving the first pushing protrusions 471, and the first spline 45 is provided with a second pushing surface 452 capable of cooperating with the first pushing surface 472 for pushing at the first receiving groove 451. When the first pushing member 47 is pulled by the first cable 49 to rotate relative to the outer rotating shell 42, the first pushing protrusion 471 on the first pushing member 47 moves in the first receiving groove 451, and the first pushing surface 472 cooperates with the second pushing surface 452 to make the first pushing member 47 push the first spline 45 to slide horizontally, thereby making the first spline 45 disengage from the first spline groove 44 on the outer rotating shell 42.

[0045] like Figure 1 and Figure 7 As shown, the first transmission rod 31 is also provided with a backrest 5 that can be rotated and folded relative to the first transmission rod 31. The backrest 5 is used to support the back of the child so that the child can be more comfortable when riding.

[0046] like Figures 8 to 11 As shown, a locking assembly 6 capable of locking the backrest 5 and the first transmission rod 31 is provided between the backrest 5 and the first transmission rod 31, and the locking assembly 6 comprises an inner shell 61 provided on the backrest 5, an outer shell 62 is provided on the first transmission rod 31, a second activity space 63 is formed between the inner shell 61 and the outer shell 62, a second spline groove 64 is provided on both the inner shell 61 and the outer shell 62, a second spline 65 capable of sliding therein is provided in the second activity space 63, a second elastic element 66 capable of simultaneously engaging the second spline 65 with the second spline groove 64 on the inner shell 61 and the outer shell 62 is provided between the second spline 65 and the inner shell 61, a second pushing member 67 capable of pushing the second spline 65 to slide laterally and disengage from the second spline groove 64 of the outer shell 62 when active is provided between the second spline 65 and the outer shell 62, a second operating member 68 is provided on the backrest 5, and a second cable 69 is provided between the second operating member 68 and the second pushing member 67.

[0047] When the backrest 5 needs to be folded or unfolded, the locking assembly 6 needs to be unlocked first, and the second operating member 68 needs to be operated. After the second operating member 68 is operated, the second cable 69 is driven to move. When the second cable 69 moves, the second pushing member 67 is driven to move and the second pushing member 67 pushes the second spline 65 to slide laterally between the inner shell 61 and the outer shell 62. The second spline 65 gradually disengages from the second spline groove 64 on the outer shell 62 and completely enters the inner shell 61. At this time, the backrest 5 can be rotated and moved closer to the seat rod 2.

[0048] like Fig.10 and Fig.11 As shown, the second pushing member 67 is provided with a plurality of second pushing protrusions 671, the second pushing protrusions 671 are provided with a third pushing surface 672, the second spline 65 is provided with a second receiving groove 651 capable of receiving the second pushing protrusions 671, and the second spline 65 is provided with a fourth pushing surface 652 capable of cooperating with the third pushing surface 672 for pushing. When the second pushing member 67 is pulled by the second cable 69 and rotates relative to the outer shell 62, the second pushing protrusion 671 on the second pushing member 67 moves in the second receiving groove 651, and the third pushing surface 672 cooperates with the fourth pushing surface 652 to make the second pushing member 67 push the second spline 65 to slide horizontally, thereby making the second spline 65 disengage from the second spline groove 64 on the outer shell 62.

[0049] like Fig.10As shown, the outer shell 62 is also provided with an inclined sliding surface 621 which cooperates with the second spline 65 to push the second spline 65 to move when the backrest 5 rotates forward relative to the first transmission rod 31. When the backrest 5 rotates forward relative to the first transmission rod 31 to adjust its angle relative to the seat rod 2, the inclined sliding surface 621 pushes the second spline 65 so that the second spline 65 is separated from the second spline groove 64 on the outer shell 62 and enters the inner shell 61. When the backrest 5 is adjusted forward to a suitable position, the second elastic element 66 pushes the second spline 65 to enter the outer shell 62 again. Therefore, when adjusting the position of the backrest 5 forward or folding the backrest, the backrest 5 can be directly pulled forward without operating the second operating member 68, making the adjustment of the backrest 5 more convenient. However, in order to prevent the backrest 5 from automatically rotating backward when a child leans on the backrest 5, the backrest 5 still needs to be unlocked by the second operating member 68 before it can be rotated backward or adjusted to ensure safety.

[0050] like Figure 7 As shown, the second transmission rod 32 is L-shaped, and includes a second straight segment 321 and a second bent segment 322 bent relative to the second straight segment 321. The second straight segment 321 is rotationally connected to the seat rod 2 around the seventh axis G, and the second bent segment 322 is fixedly connected to the first transmission rod 31.

[0051] like Figure 1 , Figure 12 to Figure 13 As shown, the rear leg 12 is also detachably connected with an armrest assembly 15, the rear leg 12 is provided with a locking position 122, the armrest assembly 15 is provided with a movable portion 151 capable of generating elastic deformation, the movable portion 151 is provided with a locking portion 152 capable of locking in or out of the locking position 122, and the movable portion 151 is provided with an operating portion 153 capable of being operated to elastically deform the movable portion 151. The armrest assembly 15 can be removed from the rear leg 12, and the operating portion 153 is pressed, and the movable portion 151 is elastically deformed after the operating portion 153 is pressed, and the locking portion 152 is gradually separated from the armrest assembly 15, and the armrest assembly 15 can be removed, so that the user can conveniently take the child out of the child stroller.

[0052] like Fig.14 and Fig.15As shown, the support rod 13 is arranged between the front leg 11 and the rear leg 12, the rear leg 12 is provided with a positioning protrusion 123 which protrudes laterally and extends into the front leg 11 and the support rod 13 in sequence, the support rod 13 is provided with a first positioning groove 131 in which the positioning protrusion 123 can move and cooperate with the positioning protrusion 123 to abut when the child stroller is in a folded state or an unfolded state, and the front leg 11 is provided with a second positioning groove 112 in which the positioning protrusion 123 can move and cooperate with the positioning protrusion 123 to abut when the child stroller is in a folded state or an unfolded state.

[0053] When the stroller is unfolded, the support rod 13 and the front leg 11 rotate and unfold relative to the rear leg 12, and the positioning protrusion 123 moves in the first positioning groove 131 and the second positioning groove 112 until they abut against the groove walls of the first positioning groove 131 and the second positioning groove 112. When the stroller is folded, the support rod 13 and the front leg 11 rotate and fold in the opposite direction relative to the rear leg 12. At this time, the positioning protrusion 123 moves in the first positioning groove 131 and the second positioning groove 112 until they abut against the groove walls on the other side of the first positioning groove 131 and the second positioning groove 112. The positioning protrusion 123 cooperates with the first positioning groove 131 and the second positioning groove 112 to locate the unfolded position and the folded position of the support rod 13 and the front leg 11 relative to the rear leg 12.

[0054] like Fig.17 As shown, the front wheel 111 is detachably connected to the front leg 11, the rear leg 121 is detachably connected to the rear leg 12, and the lower end of the push rod 14 is provided with a support 7 that can move relative to it. When the child stroller is in a folded state, the support rod 7 can be movably unfolded relative to the push rod 14 and can cooperate with the rear wheel 121 to keep the child stroller in the folded state standing, thereby facilitating the placement of the child stroller after folding.

[0055] like Figure 4 , Figure 5 and Fig.18 , Fig.19As shown, a positioning structure is provided between the support rod 7 and the push rod 14, the positioning structure includes a clamping groove 81 provided on the push rod 14, a clamping portion 82 is provided on the support rod 7, which can be engaged with or disengaged from the clamping groove 81 after sliding relative to the push rod 14, a strip hole 83 is provided on the support rod 7, a connecting shaft 84 is provided on the push rod 14, which is penetrated in the strip hole 83 and can be rotated around the support rod 7 that is disengaged from the clamping groove 81, a reset spring 85 is provided between the connecting shaft 84 and the hole wall of the strip hole 83, and a limiting edge 86 is provided on the push rod 14 to limit the rotating support rod 7. When the support rod 7 is supported on the ground, the clamping portion 82 is engaged with the clamping groove 81. When packing the stroller, the support rod 7 can be pulled to disengage the clamping portion 82 from the clamping groove 81, and then the support rod 7 can be rotated around the connecting shaft 84, so that the support rod 7 can be rotated to a certain angle. In this case, after the stroller is folded, the front wheel 111 and the rear wheel 121 can be removed, and the stroller can be packed in a smaller packaging box, thereby reducing the product transportation cost.

Claims

1. A child stroller capable of moving from an unfolded state to a folded state after a locking device is unlocked, characterized in that: The invention comprises a front leg (11), wherein the front leg (11) is connected to a rear leg (12) for rotation around a first axis (A), the rear leg (12) is connected to a support rod (13) for rotation around a second axis (B), the support rod (13) is connected to a push rod (14) for rotation around a third axis (C), the front leg (11) is connected to a seat rod (2) for rotation around a fourth axis (D), a transmission assembly (3) is provided between the seat rod (2) and the push rod (14), which enables the support rod (13) to move closer to the rear leg (12), the front leg (11) to move closer to the rear leg (12), and the seat rod (2) to move closer to the rear leg (12) when the push rod (14) rotates relative to the support rod (13) around the third axis (C), the front leg (11) is connected to a front wheel (111), and the rear leg (12) is connected to a rear wheel (121).

2. The baby stroller according to claim 1, characterized in that: The transmission assembly (3) comprises a first transmission rod (31) connected between the push rod (14) and the rear leg (12); the upper end of the first transmission rod (31) is rotatably connected to the push rod (14) around a fifth axis (E); the lower end of the first transmission rod (31) is fixedly connected to a second transmission rod (32) extending forward; the rear side of the second transmission rod (32) is rotatably connected to the rear leg (12) around a sixth axis (F); the front end of the second transmission rod (32) is rotatably connected to the rear end of the seat rod (2) around a seventh axis (G).

3. The baby stroller according to claim 2, characterized in that: The push rod (14) comprises a push rod body (141) and a connecting portion (142) disposed on the push rod body (141) and protruding downward relative to the push rod body (141); the upper end of the first transmission rod (31) is connected to the connecting portion (142) in a rotational manner around a fifth axis (E); and the push rod body (141) is connected to the support rod (13) in a rotational manner around a third axis (C).

4. The stroller according to claim 2, characterized in that: The second transmission rod (32) is arranged in an L shape, and comprises a second straight section (321) and a second bent section (322) bent relative to the second straight section (321); the second straight section (321) is rotationally connected to the seat rod (2) around a seventh axis (G); and the second bent section (322) is fixedly connected to the first transmission rod (31).

5. The baby stroller according to claim 1, characterized in that: The rear leg (12) is also detachably connected to an armrest assembly (15); a locking position (122) is provided on the rear leg (12); a movable portion (151) capable of generating elastic deformation is provided on the armrest assembly (15); a locking portion (152) capable of being locked into or out of the locking position (122) is provided on the movable portion (151); and an operating portion (153) capable of being operated to cause the movable portion (151) to elastically deform is provided on the movable portion (151).

6. The stroller according to claim 1, characterized in that: The support rod (13) is arranged between the front leg (11) and the rear leg (12); the rear leg (12) is provided with a positioning protrusion (123) which protrudes laterally and extends into the front leg (11) and the support rod (13) in sequence; the support rod (13) is provided with a first positioning groove (131) in which the positioning protrusion (123) can move and cooperate with the positioning protrusion (123) to abut against when the child stroller is in a folded state or an unfolded state; the front leg (11) is provided with a second positioning groove (112) in which the positioning protrusion (123) can move and cooperate with the positioning protrusion (123) to abut against when the child stroller is in a folded state or an unfolded state.

7. The stroller according to claim 1, characterized in that: The locking device comprises a locking assembly (4) arranged between the push rod (14) and the support rod (13), the locking assembly (4) comprising an inner rotating shell (41) arranged on the push rod (14) and an outer rotating shell (42) arranged on the support rod (13), a first movable space (43) is formed between the inner rotating shell (41) and the outer rotating shell (42), the inner rotating shell (41) and the outer rotating shell (42) are both provided with a first spline groove (44), the first movable space (43) is provided with a first spline (45) which can move relative to the first spline, the first spline (45) and the first spline (45) are connected to the first movable space (43) and the first spline groove (44) is connected to the first movable space (43) and the first spline groove (44) is connected to the first spline groove (44) and the first spline groove (45) is connected to the first spline groove (44) and the first spline groove (45) is connected to the first spline groove (44) and the first spline groove (45) is connected to the first spline groove (45 ... A first elastic element (46) is provided between the inner rotating shell (41) and the outer rotating shell (42) so as to engage the first spline (45) with the first spline groove (44) on the inner rotating shell (41) and the outer rotating shell (42) at the same time; a first pushing member (47) is provided between the first spline (45) and the push rod (14) and is capable of pushing the first spline (45) to slide laterally and disengage from the first spline groove (44) of the outer rotating shell (42) when moving; a first operating member (48) is provided on the push rod (14); and a first cable (49) is provided between the first operating member (48) and the first pushing member (47).

8. The stroller according to claim 2, characterized in that: The first transmission rod (31) is also provided with a backrest (5) capable of rotating and folding relative to the first transmission rod (31), a locking assembly (6) capable of locking the backrest (5) and the first transmission rod (31) is provided between the backrest (5), the locking assembly (6) comprises an inner shell (61) provided on the backrest (5), an outer shell (62) is provided on the first transmission rod (31), a second movable space (63) is enclosed between the inner shell (61) and the outer shell (62), the inner shell (61) and the outer shell (62) are both provided with a second spline groove (64), and a second movable space (63) capable of sliding therein is provided in the second movable space (63). A spline (65), a second elastic element (66) is provided between the second spline (65) and the inner shell (61) so that the second spline (65) can be simultaneously engaged with the second spline groove (64) on the inner shell (61) and the outer shell (62), a second pushing member (67) is provided between the second spline (65) and the outer shell (62) and can push the second spline (65) to slide laterally and disengage from the second spline groove (64) of the outer shell (62) when moving, a second operating member (68) is provided on the backrest (5), and a second cable (69) is provided between the second operating member (68) and the second pushing member (67).

9. The baby stroller according to claim 1, characterized in that: The front wheel (111) is detachably connected to the front leg (11), and the rear wheel (121) is detachably connected to the rear leg (12). A support rod (7) that can move relative to the push rod (14) is provided at the lower end of the push rod (14). When the child stroller is in a folded state, the support rod (7) can be movably unfolded relative to the push rod (14) and can cooperate with the rear wheel (121) to keep the folded child stroller standing.

10. The baby stroller according to claim 9, characterized in that: A positioning structure is provided between the support rod (7) and the push rod (14), the positioning structure comprising a clamping groove (81) provided on the push rod (14), a clamping portion (82) provided on the support rod (7) which can be engaged with or disengaged from the clamping groove (81) after sliding relative to the push rod (14), a strip hole (83) provided on the support rod (7), a connecting shaft (84) provided on the push rod (14) which passes through the strip hole (83) and can be rotated around by the support rod (7) which is disengaged from the clamping groove (81), a reset spring (85) is provided between the connecting shaft (84) and the hole wall of the strip hole (83), and when the support rod (7) is supported on the ground, the clamping portion (82) is engaged with the clamping groove (81).

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