A baby carriage frame

Abstract

The present invention discloses a baby carriage frame, wherein a first connecting seat is provided on a first supporting leg, a second connecting seat is provided on a second supporting leg and is connected to the first connecting seat around a first axis, a push rod assembly and a seat support are also connected to the first connecting seat, the push rod assembly is connected to the first connecting seat around a second axis, the seat support is connected to the first connecting seat around a third axis, a first locking device for locking the first connecting seat and the second connecting seat is provided in a space surrounded by the first connecting seat and the second connecting seat, a second locking device for locking the seat support and the first connecting seat is provided in a space surrounded by the first connecting seat, a third locking device for locking the first connecting seat and the push rod assembly is also provided in the first connecting seat, and a transmission member is provided on the push rod assembly, which can unlock the first locking device and the second locking device when the push rod assembly is rotated and folded relative to the first supporting leg after the third locking device is unlocked. The present invention has a simple structure, low cost and convenient folding operation.

Description

[Technical field]

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

[0002] Foldable baby strollers are common products for children during their growth process. Current baby strollers generally include front support legs, rear support legs, seat supports, push rod assemblies, and transmission rods between each other. There are many rods, a complex structure, and high costs, so there is room for improvement.

[0003] Therefore, the present invention is just produced based on the above shortcomings. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a baby carriage frame with simple structure and low cost.

[0005] The present invention is achieved through the following technical solutions:

[0006] A baby carriage frame, which can be moved from an unfolded position to a folded position, is characterized in that: it comprises a first support leg 1 and a second support leg 2, the lower ends of the first support leg and the second support leg are both provided with wheels 5, the first support leg 1 is provided with a first connecting seat 11, the second support leg 2 is provided with a second connecting seat 21 rotatably connected to the first connecting seat 11 around a first axis A, the first connecting seat 11 is also connected to a push rod assembly 3 and a seat support 4, the push rod assembly 3 is rotatably connected to the first connecting seat 11 around a second axis B, the seat support 4 is rotatably connected to a third axis Line C is rotationally connected to the first connecting seat 11, and a first locking device for locking the first connecting seat 11 and the second connecting seat 21 is provided in the space enclosed by the first connecting seat 11 and the second connecting seat 21, and a second locking device for locking the first connecting seat 11 and the second connecting seat 21 is provided in the space enclosed by the seat support 4 and the first connecting seat 11. The first connecting seat 11 is also provided with a third locking device for locking it with the push rod assembly 3, and the push rod assembly 3 is provided with a transmission member 6 which can unlock the first locking device and the second locking device after the third locking device is unlocked and the push rod assembly 3 is rotated and folded relative to the first support leg 1.

[0007] The baby carriage frame as described above is characterized in that: the push rod assembly 3 includes a rotating seat 31 which is inserted into the first connecting seat 11 and can rotate around the second axis B, and the rotating seat 31 is connected to an outer support rod 32.

[0008] The baby carriage frame as described above is characterized in that: the first locking device includes a first locking block 71 that can be driven by the transmission member 6 to slide in the first connecting seat 11, the first locking block 71 is provided with a first locking groove 72, and the second connecting seat 21 is provided with a first locking pin 73 that can engage with the first locking groove 72 and can be disengaged from the first locking groove 72 when the first locking block 71 is pushed by the transmission member 6 and slides relative to the first connecting seat 11, and the first connecting seat 11 is also provided with a first return spring 74 that can push the first locking block 71 to return to its original position.

[0009] The baby carriage frame as described above is characterized in that: the second locking device includes a second locking pin 81 arranged on the first connecting seat 11, the seat support 4 is provided with an arc groove 82 in which the second locking pin 81 can slide relatively, the seat support 4 is also provided with a second locking block 83 which can move laterally therein and can cooperate with the end of the arc groove 82 to surround the second locking pin 81, the seat support 4 is also provided with a sliding block 84 which can be driven by the transmission member 6 to slide in the seat support 4, when the sliding block 84 slides relative to the seat support 4, the sliding block 84 pushes the second locking block 83 to move so that the second locking block 83 disengages from the second locking pin 81, and the seat support 4 is also provided with a second return spring 85 which can push the second locking block 83 to return to its original position.

[0010] The baby carriage frame as described above is characterized in that: the transmission member 6 includes a first transmission surface 61 provided on the outer wall of the rotating seat 31 and abutting against the upper end of the first locking block 71. When the rotating seat 31 rotates, the first transmission surface 61 pushes the upper end of the first locking block 71 so that the first locking block 71 slides relative to the first connecting seat 11. The transmission member 6 also includes a second transmission surface 62 provided on the outer wall of the rotating seat 31. During the rotation of the rotating seat 31, the second transmission surface 62 pushes the lower end of the sliding block 84 so that the sliding block 84 slides relative to the seat support 4.

[0011] The baby stroller frame as described above is characterized in that: the third locking device includes a third locking pin 91 which is arranged in the first connecting seat 11 and can slide therein, the rotating seat 31 is provided with a first locking groove 92 which can engage with or disengage from the third locking pin 91 and prevent the push rod assembly 3 from rotating forward when engaged, and the third locking device also includes a driving assembly 93 which is arranged in the push rod assembly 3 and can drive the third locking pin 91 to disengage from the first locking groove 92, and the rotating seat 31 is also provided with a second locking groove 94 which can engage with or disengage from the upper end of the first locking block 71 and prevent the push rod assembly 3 from rotating backward when engaged, the upper side wall of the second locking groove 94 abuts against the upper end of the first locking block 71, the rear side wall of the second locking groove 94 abuts against the side surface of the first locking block 71, the first transmission surface 61 is formed by the upper side wall of the second locking groove 94, and the first connecting seat 11 is also provided with a third reset spring 95 which can push the third locking pin 91 to reset.

[0012] The baby carriage frame as described above is characterized in that: the first connecting seat 11 is provided with an inner hole, a bracket 96 that can slide therein is inserted into the inner hole, the third locking pin 91 is provided on the bracket 96, and the third return spring 95 is provided between the bottom of the inner hole and the bracket 96.

[0013] The baby carriage frame as described above is characterized in that: the driving assembly 93 includes a driving block 931 that can move in the rotating seat 31 to push the third locking pin 91 to disengage from the first locking groove 92, the driving block 931 is provided with an inclined groove 932, the rotating seat 31 is provided with a strip groove 933 that is connected to the inclined groove 932 along the second axis B direction, the strip groove 933 and the inclined groove 932 are penetrated by a driving pin 934, and the outer support rod 32 is provided with a cable 935 that is connected to the driving pin 934 and can pull the driving pin 934 to move and push the driving block 931 to move.

[0014] The baby carriage frame as described above is characterized in that: a push rod 33 capable of extending and retracting inside the outer support rod 32 is also provided inside the outer support rod 32, a fixed seat 34 is provided inside the outer support rod 32, a sliding seat 936 is provided inside the fixed seat 34 which can be hit by the lower end of the push rod 33 and slide relative to the fixed seat 34 when the push rod 33 retracts into the outer support rod 32, and the pull cable 935 bypasses the fixed shaft 35 on the fixed seat 34 and is connected to the sliding seat 936.

[0015] The baby carriage frame as described above is characterized in that: the seat support 4 is also connected to a seat assembly 50 that can rotate relative to the seat support 4, a positioning device is provided between the seat assembly 50 and the seat support 4, the positioning device includes a positioning groove provided on the seat support 4, the positioning groove includes a first positioning groove 501 and a second positioning groove 502 that can enable the seat assembly 50 to stay facing forward and backward, the positioning groove also includes a third positioning groove 503 that can enable the seat assembly 50 to stay facing obliquely forward, and the seat assembly 50 is provided with a positioning pin that can engage with or disengage from the first positioning groove 501, the second positioning groove 502 and the third positioning groove 503 respectively.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. According to the present invention, a first locking device is arranged in a space surrounded by the first connecting seat and the second connecting seat, a second locking device is arranged in a space surrounded by the first connecting seat and the seat support, and a third locking device is also arranged in the first connecting seat for locking the first connecting seat with the push rod assembly, thereby locking the baby stroller frame in the unfolded state. Since the first locking device, the second locking device and the third locking device are all arranged in the internal space, the baby stroller frame is simple as a whole, with fewer external transmission rods and low cost. When the baby stroller frame is folded, once the third locking device is unlocked and the push rod assembly is rotated and folded relative to the first supporting leg, the transmission member on the push rod assembly can also drive the first locking device and the second locking device to unlock, so that the seat support can be rotated and moved closer to the first supporting leg, and the second supporting leg can also be rotated and moved closer relative to the first supporting leg, so that the unlocking of each component of the baby stroller frame is linked control, making the folding operation of the baby stroller frame simple and quick.

[0018] 2. The seat support of the present invention is provided with a first positioning groove and a second positioning groove that can make the seat assembly stay in the forward and backward directions, and the seat support is also provided with a third positioning groove that can make the seat assembly stay in the obliquely forward direction. The first positioning groove, the second positioning groove and the third positioning groove are respectively matched with the positioning pins on the seat assembly to make the seat assembly stay in a suitable orientation. The front and rear orientation of the seat assembly can be changed by respectively matching the first positioning groove and the second positioning groove with the positioning pins, and the third positioning groove is matched with the positioning pin to make the seat assembly face obliquely forward. This orientation is particularly suitable for children sitting in the seat assembly to watch animals near the zoo glass. It can make the child stroller closer to the zoo glass when the child watches the animals from the front, so that the child is as close to the animals as possible for easy viewing.

[0019] 3. The present invention has a simple structure, low cost, and convenient folding operation, and is suitable for popularization and application.

Brief Description of the Drawings

[0020] Figure 1It is a stereogram of the present invention;

[0021] Figure 2 is a side view of the present invention;

[0022] Figure 3 is a side view of the present invention in a folded state;

[0023] Figure 4 It is one of the partial cross-sectional views of the present invention;

[0024] Figure 5 is an exploded view of the components of the present invention;

[0025] Figure 6 This is the second partial cross-sectional view of the present invention;

[0026] Figure 7 It is the third partial cross-sectional view of the present invention;

[0027] Figure 8 is a three-dimensional diagram of the present invention after configuring the seat assembly;

[0028] Fig. 9 It is a schematic diagram of the folded state of the seat assembly after the present invention is configured. [Specific implementation method]

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

[0030] like Figures 1 to 6As shown, a baby carriage frame can be moved from an unfolded position to a folded position, comprising a first support leg 1 and a second support leg 2, wherein the lower ends of the first support leg and the second support leg are both provided with wheels 5, the first support leg 1 is provided with a first connecting seat 11, the second support leg 2 is provided with a second connecting seat 21 rotatably connected to the first connecting seat 11 around a first axis A, the first connecting seat 11 is also connected with a push rod assembly 3 and a seat support 4, the push rod assembly 3 is rotatably connected to the first connecting seat 11 around a second axis B, and the seat support 4 is rotatably connected to the first connecting seat 11 around a third axis C It is rotatably connected to the first connecting seat 11, and a first locking device for locking the first connecting seat 11 and the second connecting seat 21 is provided in the space enclosed by the first connecting seat 11 and the second connecting seat 21. A second locking device for locking the first connecting seat 11 is provided in the space enclosed by the seat support 4 and the first connecting seat 11. The first connecting seat 11 is also provided with a third locking device for locking it with the push rod assembly 3, and the push rod assembly 3 is provided with a transmission member 6 which can unlock the first locking device and the second locking device after the third locking device is unlocked and the push rod assembly 3 is rotated and folded relative to the first support leg 1. A first locking device is arranged in the space surrounded by the first connecting seat 11 and the second connecting seat 21, a second locking device is arranged in the space surrounded by the first connecting seat 11 and the seat support 4, and a third locking device is also arranged in the first connecting seat 11 to lock it with the push rod assembly 3, thereby locking the baby stroller frame in the unfolded state. Since the first locking device, the second locking device and the third locking device are all arranged in the internal space, the baby stroller frame is simple as a whole, with fewer external transmission rods and low cost. When the baby stroller frame is folded, once the third locking device is unlocked and the push rod assembly 3 is rotated and folded relative to the first supporting leg 1, the transmission member 6 on the push rod assembly 3 can also drive the first locking device and the second locking device to unlock, so that the seat support 3 can be rotated and moved closer to the first supporting leg 1, and the second supporting leg 2 can also be rotated and moved closer to the first supporting leg 1, so that the unlocking of each component of the baby stroller frame is linked control, making the folding operation of the baby stroller frame simple and quick. Specifically, when folding, after the third locking device is unlocked, the push rod assembly 3 is rotated forward around the second axis B, and the transmission member 6 on the push rod assembly 3 unlocks the first locking device and the second locking device. At this time, you only need to lift up the first connecting seat 11 or the second connecting seat 21, and the seat support member 4 can rotate around the third axis C to move closer to the first supporting leg 1, and the first supporting leg 1 rotates around the first axis A relative to the second supporting leg 2, thereby realizing the folding of the baby carriage frame. Therefore, when folding, you only need to unlock the third locking device, then turn the push rod assembly 3 forward, and then lift it up. The folding operation is very convenient and quick.

[0031] like Figures 4 to 6 As shown, the push rod assembly 3 includes a rotating seat 31 which is inserted into the first connecting seat 11 and can rotate around the second axis B. The rotating seat 31 is connected to an outer support rod 32.

[0032] like Figure 5 and Figure 6 As shown, the first locking device comprises a first locking block 71 which can be driven by the transmission member 6 to slide in the first connecting seat 11, a first locking groove 72 is provided on the first locking block 71, a first locking pin 73 which can engage with the first locking groove 72 and can be disengaged from the first locking groove 72 when the first locking block 71 is pushed by the transmission member 6 and slides relative to the first connecting seat 11 is provided on the second connecting seat 21 and deviates from the first axis A, and a first reset spring 74 which can push the first locking block 71 to reset is also provided in the first connecting seat 11. When the third locking device is unlocked and the rotating seat 31 rotates forward around the second axis B, the transmission member 6 pushes the first locking block 71 to slide in the first connecting seat 11, and during the sliding process, the first locking groove 72 on the first locking block 71 is disengaged from the first locking pin 73 on the second connecting seat 21, and once the first locking pin 73 is disengaged from the first locking groove 72, the first locking device is unlocked, and the first supporting leg 1 can be rotated and folded relative to the second supporting leg 2.

[0033] like Figure 5 and Figure 6 As shown, the second locking device includes a second locking pin 81 arranged on the first connecting seat 11, the seat support 4 is provided with an arc groove 82 for the second locking pin 81 to slide relatively therein, the seat support 4 is also provided with a second locking block 83 which can move laterally therein and can cooperate with the end of the arc groove 82 to surround the second locking pin 81, the seat support 4 is also provided with a sliding block 84 which can be driven by the transmission member 6 to slide in the seat support 4, when the sliding block 84 slides relative to the seat support 4, the sliding block 84 pushes the second locking block 83 to move so that the second locking block 83 disengages from the second locking pin 81, and the seat support 4 is also provided with a second return spring 85 which can push the second locking block 83 to return to its original position. When the third locking device is unlocked and the rotating seat 31 rotates forward around the second axis B, the transmission member 6 pushes the sliding block 84 to slide, and the sliding block 84 pushes the second locking block 83 to move during the sliding process. During the movement, the second locking block 83 no longer surrounds the second locking pin 81 with the end of the arc groove 82, so that the second locking pin 81 can slide relative to the arc groove 82, so that the second locking device is unlocked, and the seat support member 4 can rotate relative to the first connecting seat 11 around the third axis C and move closer to the first support leg 1. The cooperation between the sliding block 84 and the second locking block 83 can adopt the cooperation mode of inclined surface pushing inclined surface, that is, the longitudinal movement of the sliding block 84 is converted into the lateral movement of the second locking block 83.

[0034] like Figure 6As shown, the transmission member 6 includes a first transmission surface 61 disposed on the outer wall of the rotating seat 31 and abutting against the upper end of the first locking block 71. When the rotating seat 31 rotates, the first transmission surface 61 pushes the upper end of the first locking block 71 so that the first locking block 71 slides relative to the first connecting seat 11. The transmission member 6 also includes a second transmission surface 62 disposed on the outer wall of the rotating seat 31. During the rotation of the rotating seat 31, the second transmission surface 62 pushes the lower end of the sliding block 84 so that the sliding block 84 slides relative to the seat support 4. When the rotating seat 31 rotates, the first transmission surface 61 pushes the upper end surface of the first locking block 71, so that the first locking block 71 slides, and then the first locking device is unlocked. In addition, during the rotation of the rotating seat 31, the second transmission surface 62 also pushes the lower end surface of the sliding block 84, so that the sliding block 84 moves, and then pushes the second locking block 83 to move, and finally the second locking device is unlocked. Therefore, the rotation of the rotating seat 31 can make the second locking device and the first locking device unlock in conjunction, which is a clever design. Figure 6 As shown, in order to facilitate the smooth movement of the first locking block 71, the first transmission surface 61 can be set to an arc surface, and the upper end surface of the first locking block 71 can also be set to an arc surface.

[0035] like Figures 4 to 6 As shown, the third locking device includes a third locking pin 91 which is arranged in the first connecting seat 11 and can slide therein, the rotating seat 31 is provided with a first locking groove 92 which can engage with or disengage with the third locking pin 91 and prevent the push rod assembly 3 from rotating forward when engaged, and the third locking device also includes a driving assembly 93 which is arranged in the push rod assembly 3 and can drive the third locking pin 91 to disengage from the first locking groove 92. The rotating seat 31 is also provided with a second locking groove 94 which can engage with or disengage with the upper end of the first locking block 71 and prevent the push rod assembly 3 from rotating backward when engaged, the upper side wall of the second locking groove 94 abuts against the upper end of the first locking block 71, the rear side wall of the second locking groove 94 abuts against the side of the first locking block 71, the first transmission surface 61 is formed by the upper side wall of the second locking groove 94, and the first connecting seat 11 is also provided with a third reset spring 95 which can push the third locking pin 91 to reset. When the baby carriage frame is in the unfolded state, the third locking pin 91 is located in the first slot 92, and the first locking block 71 is located in the second slot 94. The third locking pin 91 cooperates with the first slot 92 to prevent the push rod assembly 3 from rotating forward, and the first locking block 71 cooperates with the second slot 94 to prevent the push rod assembly 3 from rotating backward, thereby maintaining the unfolded state of the baby carriage frame. When the baby carriage needs to be folded, the third locking pin 91 can be pushed out of the first slot 92 by the driving assembly 93, and the push rod assembly 3 can be rotated forward to fold the baby carriage.

[0036] like Figure 5As shown, the first connecting seat 11 is provided with an inner hole (not marked in the figure), and a bracket 96 capable of sliding therein is inserted into the inner hole, the third locking pin 91 is provided on the bracket 96, and the third reset spring 95 is provided between the bottom of the inner hole and the bracket 96.

[0037] like Figure 5 As shown, the driving assembly 93 includes a driving block 931 that can move in the rotating seat 31 to push the third locking pin 91 to disengage from the first slot 92, the driving block 931 is provided with an inclined slot 932, the rotating seat 31 is provided with a strip groove 933 that communicates with the inclined slot 932 along the second axis B, the strip groove 933 and the inclined slot 932 are penetrated with a driving pin 934, and the outer support rod 32 is provided with a cable 935 that is connected to the driving pin 934 and can pull the driving pin 934 to move and push the driving block 931 to move. When the cable 935 pulls the driving pin 934, the driving pin 934 pushes the slot wall of the inclined slot 932 when it moves horizontally, so that the driving block 931 can move longitudinally in the rotating seat 31, and then the third locking pin 91 is pushed to disengage from the first slot 92 through the driving block 931, so that the third locking device is unlocked.

[0038] like Figure 5 and Figure 7 As shown, the outer support rod 32 is further provided with a push rod 33 that can be extended and retracted therein, and the outer support rod 32 is provided with a fixed seat 34, and the fixed seat 34 is provided with a sliding seat 936 that can be hit by the lower end of the push rod 33 and slide relative to the fixed seat 34 when the push rod 33 retracts into the outer support rod 32, and the cable 935 bypasses the fixed shaft 35 on the fixed seat 34 and is connected to the sliding seat 936. When the push rod 33 hits the sliding seat 936 downward, the sliding seat 936 moves downward, because the cable 935 is connected to the sliding seat 936 around the fixed shaft 35, so when the sliding seat 936 moves downward, the cable 935 can pull the driving pin 934 to move horizontally, which is a clever design.

[0039] like Figure 1 , Figure 5 , Figure 8 and Fig. 9As shown, the seat support 4 is also connected to a seat assembly 50 that can rotate relative to it, and a positioning device is provided between the seat assembly 50 and the seat support 4. The positioning device includes a positioning groove provided on the seat support 4, and the positioning groove includes a first positioning groove 501 and a second positioning groove 502 that can make the seat assembly 50 stay in the direction facing forward and backward, and the positioning groove also includes a third positioning groove 503 that can make the seat assembly 50 stay in the direction facing obliquely forward. The seat assembly 50 is provided with a positioning pin (not shown in the figure) that can be engaged with or disengaged from the first positioning groove 501, the second positioning groove 502 and the third positioning groove 503 respectively. The front and rear directions of the seat assembly 50 can be changed by respectively cooperating with the first positioning groove 501 and the second positioning groove 502, and the third positioning groove 503 can be used to cooperating with the positioning pin to make the seat assembly 50 face obliquely forward. This orientation is particularly suitable for children sitting in the seat assembly 50 to watch animals next to the zoo glass, so that the child can watch the animals from the front and the side of the baby carriage is closer to the zoo glass, so that the child is as close to the animals as possible for easy viewing.

[0040] like Figure 8 and Fig. 9 As shown, the push rod 33 is also provided with a support portion 60 which can be supported on the ground to keep the baby carriage in a standing state when the baby carriage is in a folded state.

Claims

1. A baby carriage frame, capable of moving from an unfolded position to a folded position, characterized in that: The invention comprises a first supporting leg (1) and a second supporting leg (2), wherein the lower ends of the first supporting leg (1) and the second supporting leg (2) are both provided with wheels (5), the first supporting leg (1) is provided with a first connecting seat (11), the second supporting leg (2) is provided with a second connecting seat (21) rotatably connected to the first connecting seat (11) around a first axis (A), the first connecting seat (11) is also connected with a push rod assembly (3) and a seat support member (4), the push rod assembly (3) is rotatably connected to the first connecting seat (11) around a second axis (B), and the seat support member (4) is rotatably connected to the first connecting seat (11) around a third axis (C). The connecting seat (11) is rotatably connected, a first locking device for locking the first connecting seat (11) and the second connecting seat (21) is provided in the space enclosed by the first connecting seat (11) and the second connecting seat (21), a second locking device for locking the first connecting seat (11) is provided in the space enclosed by the seat support (4) and the first connecting seat (11), a third locking device for locking the first connecting seat (11) and the push rod assembly (3) is also provided in the first connecting seat (11), and a transmission member (6) is provided on the push rod assembly (3) which can unlock the first locking device and the second locking device when the third locking device is unlocked and the push rod assembly (3) is rotated and folded relative to the first support leg (1); The push rod assembly (3) comprises a rotating seat (31) which is inserted into the first connecting seat (11) and can rotate around the second axis (B), and the rotating seat (31) is connected to an outer support rod (32); The first locking device comprises a first locking block (71) which can be driven by the transmission member (6) to slide in the first connecting seat (11); the first locking block (71) is provided with a first locking groove (72); a first locking pin (73) which can engage with the first locking groove (72) and can be disengaged from the first locking groove (72) when the first locking block (71) is pushed by the transmission member (6) and slides relative to the first connecting seat (11) is provided on the second connecting seat (21) and deviates from the first axis (A); and a first return spring (74) which can push the first locking block (71) to return to its original position is also provided in the first connecting seat (11); The second locking device comprises a second locking pin (81) arranged on the first connecting seat (11); the seat support (4) is provided with an arc groove (82) in which the second locking pin (81) can slide relatively; the seat support (4) is also provided with a second locking block (83) which can move laterally therein and can cooperate with the end of the arc groove (82) to surround the second locking pin (81); the seat support (4) is also provided with a sliding block (84) which can be driven by the transmission member (6) to slide in the seat support (4); when the sliding block (84) slides relative to the seat support (4), the sliding block (84) pushes the second locking block (83) to move so that the second locking block (83) is separated from the second locking pin (81); the seat support (4) is also provided with a second reset spring (85) which can push the second locking block (83) to reset; The transmission member (6) includes a first transmission surface (61) provided on the outer wall of the rotating seat (31) and abutting against the upper end of the first locking block (71). When the rotating seat (31) rotates, the first transmission surface (61) pushes the upper end of the first locking block (71) so that the first locking block (71) slides relative to the first connecting seat (11). The transmission member (6) also includes a second transmission surface (62) provided on the outer wall of the rotating seat (31). When the rotating seat (31) rotates, the second transmission surface (62) pushes the lower end of the sliding block (84) so ​​that the sliding block (84) slides relative to the seat support member (4). The seat support (4) is also connected to a seat assembly (50) that can rotate relative to the seat support. A positioning device is provided between the seat assembly (50) and the seat support (4). The positioning device includes a positioning groove provided on the seat support (4). The positioning groove includes a first positioning groove (501) and a second positioning groove (502) that can enable the seat assembly (50) to stay facing forward and backward. The positioning groove also includes a third positioning groove (503) that can enable the seat assembly (50) to stay facing obliquely forward. The seat assembly (50) is provided with a positioning pin that can be respectively engaged with or disengaged from the first positioning groove (501), the second positioning groove (502) and the third positioning groove (503).

2. The baby carriage frame according to claim 1, characterized in that: The third locking device comprises a third locking pin (91) arranged in the first connecting seat (11) and capable of sliding therein, the rotating seat (31) is provided with a first slot (92) which can engage with or disengage from the third locking pin (91) and can prevent the push rod assembly (3) from rotating forward when engaged, the third locking device also comprises a driving assembly (93) arranged in the push rod assembly (3) and capable of driving the third locking pin (91) to disengage from the first slot (92), the rotating seat (31) is also provided with a first slot (92) which can engage with or disengage from the third locking pin (91) and can prevent the push rod assembly (3) from rotating forward when engaged, The upper end of the locking block (71) is engaged or disengaged from a second locking groove (94) which can prevent the push rod assembly (3) from rotating backward when engaged, the upper side wall of the second locking groove (94) abuts against the upper end of the first locking block (71), the rear side wall of the second locking groove (94) abuts against the side surface of the first locking block (71), the first transmission surface (61) is formed by the upper side wall of the second locking groove (94), and the first connecting seat (11) is also provided with a third reset spring (95) which can push the third locking pin (91) to reset.

3. The baby carriage frame according to claim 2, characterized in that: The first connecting seat (11) is provided with an inner hole, a bracket (96) is inserted into the inner hole and can slide therein, the third locking pin (91) is arranged on the bracket (96), and the third return spring (95) is arranged between the bottom of the inner hole and the bracket (96).

4. The baby carriage frame according to claim 2, characterized in that: The driving assembly (93) comprises a driving block (931) which can move in the rotating seat (31) to push the third locking pin (91) to disengage from the first locking groove (92); the driving block (931) is provided with an inclined groove (932); the rotating seat (31) is provided with a strip groove (933) which is in communication with the inclined groove (932) along the second axis (B); a driving pin (934) is passed through the strip groove (933) and the inclined groove (932); and the outer support rod (32) is provided with a cable (935) which is connected to the driving pin (934) and can pull the driving pin (934) to move and push the driving block (931) to move.

5. The baby carriage frame according to claim 4, characterized in that: The outer support rod (32) is also provided with a push rod (33) that can be extended and retracted therein, and the outer support rod (32) is provided with a fixed seat (34). The fixed seat (34) is provided with a sliding seat (936) that can be hit by the lower end of the push rod (33) when the push rod (33) retracts into the outer support rod (32) and slide relative to the fixed seat (34). The pull cable (935) bypasses the fixed shaft (35) on the fixed seat (34) and is connected to the sliding seat (936).

Images