CN215851417U

CN215851417U - Frame of baby carriage

Info

Publication number: CN215851417U
Application number: CN202122099024.5U
Authority: CN
Inventors: 唐凌伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-12
Filing date: 2021-09-01
Publication date: 2022-02-18
Anticipated expiration: 2031-09-01
Also published as: CN215851418U

Abstract

The utility model discloses a baby carriage frame, wherein a first connecting seat is arranged on a first supporting leg, a second connecting seat which is rotatably connected with the first connecting seat around a first axis is arranged on a second supporting leg, a push rod component and a seat supporting piece are also connected on the first connecting seat, the push rod component is rotatably connected with the first connecting seat around a second axis, the seat supporting piece is rotatably connected with the first connecting seat around a third axis, a first locking device for locking the first connecting seat and the second connecting seat is arranged in a space enclosed by the first connecting seat and the second connecting seat, a second locking device for locking the seat supporting piece and the first connecting seat is arranged in a space enclosed by the seat supporting piece and the first connecting seat, a third locking device for locking the first connecting seat and the push rod component is also arranged in the first connecting seat, and a transmission part which enables the first locking device and the second locking device to be unlocked is arranged on the push rod assembly after the third locking device is unlocked and the push rod assembly rotates and folds relative to the first supporting leg. The folding device is simple in structure, low in cost and convenient to fold and operate.

Description

Frame of baby carriage

[ technical field ] A method for producing a semiconductor device

The utility model relates to a frame of a baby carriage.

[ background of the utility model ]

The foldable baby carrier is a common product in the growth process of children, the existing baby carrier generally comprises a front supporting leg, a rear supporting leg, a seat supporting piece, a push rod component and transmission rod pieces among the front supporting leg, the rear supporting leg, the seat supporting piece, the push rod component and the push rod component, the number of the rod pieces is large, the structure is complex, the cost is high, and an improved space exists.

Therefore, the present invention has been made in view of the above disadvantages.

[ Utility model ] content

The utility model aims to overcome the defects of the prior art and provide the baby carriage frame with simple structure and low cost.

The utility model is realized by the following technical scheme:

a stroller frame movable from an unfolded position to a folded position, characterized in that: the device comprises a first supporting leg 1 and a second supporting leg 2, wheels 5 are arranged at the lower ends of the first supporting leg and the second supporting leg, a first connecting seat 11 is arranged on the first supporting leg 1, a second connecting seat 21 which is rotatably connected with the first connecting seat 11 around a first axis A is arranged on the second supporting leg 2, a push rod component 3 and a seat supporting component 4 are further connected onto the first connecting seat 11, the push rod component 3 and the first connecting seat 11 are rotatably connected around a second axis B, the seat supporting component 4 is rotatably connected with the first connecting seat 11 around a third axis C, a first locking device for locking the first connecting seat 11 and the second connecting seat 21 is arranged in a space surrounded by the first connecting seat 11 and the second connecting seat 21, a second locking device for locking the seat supporting component 4 and the first connecting seat 11 is arranged in the space surrounded by the seat supporting component and the first connecting seat 11, and a third locking device for locking the first connecting seat 11 and the push rod component 3 is further arranged in the first connecting seat 11, and a transmission piece 6 which can unlock the first locking device and the second locking device when the push rod assembly 3 rotates and folds relative to the first support leg 1 after the third locking device is unlocked is arranged on the push rod assembly 3.

The baby carriage frame is characterized in that: push rod subassembly 3 including wear to establish in first connecting seat 11 and can be around second axis B pivoted rotation seat 31, rotation seat 31 on be connected with outer vaulting pole 32.

The baby carriage frame is characterized in that: the first locking device comprises a first locking block 71 which can be driven by the transmission piece 6 to slide in the first connecting seat 11, a first locking groove 72 is formed in the first locking block 71, a first locking pin 73 which can be clamped with the first locking groove 72 and can be separated from the first locking groove 72 when the first locking block 71 is pushed by the transmission piece 6 to slide relative to the first connecting seat 11 is arranged 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 is further arranged in the first connecting seat 11.

The baby carriage frame is characterized in that: the second locking device comprises a second locking pin 81 arranged on the first connecting seat 11, an arc-shaped groove 82 for the second locking pin 81 to slide relatively is arranged on the seat supporting member 4, a second locking block 83 which can move transversely in the seat supporting member 4 and can be matched with the end part of the arc-shaped groove 82 to surround the second locking pin 81 is also arranged in the seat supporting member 4, a sliding block 84 which can be driven by the transmission member 6 to slide in the seat supporting member 4 is also arranged in the seat supporting member 4, when the sliding block 84 slides relative to the seat supporting member 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, and a second return spring 85 which can push the second locking block 83 to return is also arranged in the seat supporting member 4.

The baby carriage frame is characterized in that: the transmission member 6 includes a first transmission surface 61 disposed on the outer side wall of the rotating seat 31 and in abutting engagement with 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 to enable the first locking block 71 to slide relative to the first connecting seat 11, the transmission member 6 further includes a second transmission surface 62 disposed on the outer side wall of the rotating seat 31, and in the rotating process of the rotating seat 31, the second transmission surface 62 pushes the lower end of the sliding block 84 to enable the sliding block 84 to slide relative to the seat support 4.

The baby carriage frame is characterized in that: the third latch means includes a third latch pin 91 provided in the first coupling seat 11 and capable of sliding therein, a first locking groove 92 which can be engaged with or disengaged from the third locking pin 91 and can prevent the push rod assembly 3 from rotating forwards when engaged is arranged on the rotating seat 31, the third locking device further comprises a driving component 93 which is arranged in the push rod component 3 and can drive the third locking pin 91 to be separated from the first locking groove 92, the rotating seat 31 is further provided with a second engaging groove 94 which can be engaged with or disengaged from the upper end of the first engaging block 71 and can prevent the push rod assembly 3 from rotating backwards during engagement, the upper side wall of the second slot 94 is abutted with the upper end of the first locking block 71, the rear side wall of the second slot 94 is abutted with the side surface of the first locking block 71, the first transmission surface 61 is formed by an upper side wall of the second engaging groove 94, and a third return spring 95 capable of pushing the third engaging pin 91 to return is further disposed in the first connecting seat 11.

The baby carriage frame is characterized in that: the first connecting seat 11 is provided with an inner hole, a bracket 96 capable of sliding in the inner hole is inserted in the inner hole, 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.

The baby carriage frame is characterized in that: the driving assembly 93 include and move and promote the driving block 931 that third bayonet lock 91 and first draw-in groove 92 break away from in rotating the seat 31, driving block 931 on be equipped with chute 932, rotate the seat 31 on be equipped with along second axis B direction with the communicating bar groove 933 of chute 932, bar groove 933 and chute 932 in wear to be equipped with the drive pin 934, outer vaulting pole 32 in be equipped with and be connected with drive pin 934 and can stimulate the drive pin 934 and move and promote the cable 935 that the driving block 931 removed.

The baby carriage frame is characterized in that: the outer support rod 32 is internally provided with a hand push rod 33 which can stretch out and draw back, the outer support rod 32 is internally provided with a fixed seat 34, the fixed seat 34 is internally provided with a sliding seat 936 which can be impacted by the lower end of the hand push rod 33 and slide relative to the fixed seat 34 when the hand push rod 33 retracts into the outer support rod 32, and the inhaul cable 935 bypasses the fixed shaft 35 on the fixed seat 34 and is connected on the sliding seat 936.

The baby carriage frame is characterized in that: seat support 4 on still be connected with its pivoted seat subassembly 50 relatively, seat subassembly 50 and seat support 4 between be equipped with positioner, positioner including establishing the constant head tank on seat support 4, the constant head tank including enabling seat subassembly 50 to stop at the first constant head tank 501 and the second constant head tank 502 of forward and backward facing, the constant head tank still including enabling seat subassembly 50 to stop at the third constant head tank 503 of oblique the place ahead facing, seat subassembly 50 on be equipped with the locating pin that can block respectively or break away from with first constant head tank 501, second constant head tank 502 and third constant head tank 503.

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

1. the first latch device is arranged in the space enclosed by the first connecting seat and the second connecting seat, the second latch device is arranged in the space enclosed by the first connecting seat and the seat supporting piece, the third latch device for locking the first connecting seat and the push rod component is also arranged in the first connecting seat, so that the frame of the baby carriage is locked in the unfolded state, the first latch device, the second latch device and the third latch device are all arranged in the inner space, the whole frame of the baby carriage is simple, the number of external transmission rod pieces is small, the cost is low, and when the frame of the baby carriage is folded, once the third latch device is unlocked and the push rod component rotates and folds relative to the first supporting leg, the transmission piece on the push rod component can drive the first latch device and the second latch device to unlock, so that the seat supporting piece can rotate and approach to the first supporting leg, and the second supporting leg can also rotate and approach to the first supporting leg, the unlocking of each component of the frame of the baby carrier is linkage control, so that the folding operation of the frame of the baby carrier is simple and quick.

2. The seat support is provided with a first positioning groove and a second positioning groove which can enable the seat assembly to stay at the front and the rear, the seat support is also provided with a third positioning groove which can enable the seat assembly to stay at the oblique front, and 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 enable the seat assembly to stay at the proper orientation position. Through first constant head tank and second constant head tank cooperation with the locating pin respectively, can change the front and back orientation of seat subassembly, and the cooperation of third constant head tank and locating pin can be with seat subassembly oblique the place ahead of orientation, and this kind of orientation is particularly suitable for taking the children in the seat subassembly at zoo glass limit animal of vwatching, makes the bassinet more be close to zoo glass again when can making children openly vwatching the animal, and it is nearer to make children leave the animal as far as possible, is convenient for vwatch.

3. The folding device is simple in structure, low in cost, convenient to fold and operate and suitable for popularization and application.

[ description of the drawings ]

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a side view of the present invention in a folded state;

FIG. 4 is one of the partial cross-sectional views of the present invention;

FIG. 5 is an exploded view of the components of the present invention;

FIG. 6 is a second partial cross-sectional view of the present invention;

FIG. 7 is a third partial cross-sectional view of the present invention;

FIG. 8 is a perspective view of the present invention with the seat assembly deployed;

figure 9 is a schematic view of the present invention in a folded configuration with the seat assembly deployed.

[ detailed description ] embodiments

The utility model is further described below with reference to the accompanying drawings:

as shown in fig. 1 to 6, a frame of a baby carriage, which can move from an unfolded position to a folded position, comprises a first supporting leg 1 and a second supporting leg 2, wherein the lower ends of the first supporting leg and the second supporting leg are respectively provided with a wheel 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 with the first connecting seat 11 around a first axis a, the first connecting seat 11 is further connected with a push rod assembly 3 and a seat supporting member 4, the push rod assembly 3 is rotatably connected with the first connecting seat 11 around a second axis B, the seat supporting member 4 is rotatably connected with the first connecting seat 11 around a third axis C, a first locking device for locking the first connecting seat 11 and the second connecting seat 21 is arranged in a space surrounded by the first connecting seat 11 and the second connecting seat supporting member 4, and a second locking device for locking the first connecting seat 11 are arranged in a space surrounded by the seat supporting member 4 and the first connecting seat supporting seat 11, still be equipped with in the first connecting seat 11 and be used for its third kayser device with push rod assembly 3 locking, and push rod assembly 3 on be equipped with after the unblock of third kayser device and push rod assembly 3 and rotate the driving medium 6 that enables first kayser device and the unblock of second kayser device when folding relatively first supporting leg 1. The first locking device is arranged in the space enclosed by the first connecting seat 11 and the second connecting seat 21, the second locking device is arranged in the space enclosed by the first connecting seat 11 and the seat support 4, the third locking device for locking the first connecting seat 11 and the push rod component 3 is also arranged in the first connecting seat 11, so that the frame of the baby carriage is locked in the unfolding state, the whole baby carriage frame is simple because the first locking device, the second locking device and the third locking device are arranged in the inner space, the external transmission rod components are few, the cost is low, when the baby carriage frame is folded, once the third locking device is unlocked and the push rod component 3 rotates and folds relative to the first support leg 1, the transmission component 6 on the push rod component 3 can drive the first locking device and the second locking device to unlock, so that the seat support 3 can rotate and draw close to the first support leg 1, and the second support leg 2 can also rotate and draw close to the first support leg 1, the unlocking of each component of the frame of the baby carrier is linkage control, so that the folding operation of the frame of the baby carrier is simple and quick. Specifically when folding, behind the third latch device unblock, push rod assembly 3 rotates forward around second axis B, driving medium 6 on the push rod assembly 3 just makes first latch device and the unblock of second latch device, only need upwards mention first connecting seat 11 or second connecting seat 21 this moment, seat support piece 4 just can be drawn close to first supporting leg 1 rotation around third axis C, first supporting leg 1 rotates around first axis A relative second supporting leg 2 and draws close, thereby realize that the bassinet frame is folding, consequently, when folding, only need the unblock of third latch device, then forward one push rod assembly 3, after that upwards mention can, folding operation convenience and rapidity very.

As shown in fig. 4 to 6, the push rod assembly 3 includes a rotating seat 31 penetrating through the first connecting seat 11 and capable of rotating around the second axis B, and an outer stay 32 is connected to the rotating seat 31.

As shown in fig. 5 and 6, the first locking device includes a first locking block 71 driven by the transmission member 6 to slide in the first connecting seat 11, a first locking groove 72 is disposed on the first locking block 71, a first locking pin 73 capable of being engaged with the first locking groove 72 and being disengaged from the first locking groove 72 when the first locking block 71 is pushed by the transmission member 6 to slide relative to the first connecting seat 11 is disposed on the second connecting seat 21 and deviated from the first axis a, and a first return spring 74 capable of pushing the first locking block 71 to return is further disposed in the first connecting seat 11. When the third locking device is unlocked and the rotating base 31 rotates forward around the second axis B, the transmission member 6 pushes the first locking block 71 to slide in the first connecting base 11, the first locking groove 72 on the first locking block 71 is separated from the first locking pin 73 on the second connecting base 21 during the sliding process, and once the first locking pin 73 is separated from the first locking groove 72, the first locking device is unlocked, and the first supporting leg 1 can rotate and fold relative to the second supporting leg 2.

As shown in fig. 5 and 6, the second locking device includes a second locking pin 81 disposed on the first connecting seat 11, an arc-shaped groove 82 for the second locking pin 81 to slide relatively therein is disposed on the seat support 4, a second locking block 83 capable of moving transversely therein and cooperating with an end of the arc-shaped groove 82 to surround the second locking pin 81 is further disposed in the seat support 4, a sliding block 84 capable of being driven by the driving member 6 to slide in the seat support 4 is further disposed 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 disengaged from the second locking pin 81, and a second return spring 85 capable of pushing the second locking block 83 to return is further disposed in the seat support 4. When the third latch device is unlocked and the rotating base 31 rotates forward around the second axis B, the transmission member 6 pushes the sliding block 84 to slide, the sliding block 84 pushes the second latch block 83 to move in the sliding process, the second latch block 83 does not surround the second latch pin 81 with the end of the arc-shaped groove 82 in the moving process, so that the second latch pin 81 can slide relative to the arc-shaped groove 82, the second latch device is unlocked, and the seat support 4 can rotate relative to the first connecting base 11 around the third axis C to approach the first support leg 1. The engagement of the slide block 84 with the second locking piece 83 may be a bevel push-on bevel engagement, i.e., the longitudinal movement of the slide block 84 is converted into the transverse movement of the second locking piece 83.

As shown in fig. 6, the transmission member 6 includes a first transmission surface 61 disposed on an outer side wall of the rotating seat 31 and in abutting engagement with an 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 to enable the first locking block 71 to slide relative to the first connecting seat 11, and the transmission member 6 further includes a second transmission surface 62 disposed on an outer side wall of the rotating seat 31, and during the rotation of the rotating seat 31, the second transmission surface 62 pushes a lower end of the sliding block 84 to enable the sliding block 84 to slide relative to the seat support 4. When the rotating base 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 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 further the second locking block 83 moves, and finally the second locking device is unlocked. Therefore, the second locking device and the first locking device can be unlocked in a linkage manner by rotating the rotating seat 31, and the design is ingenious. As shown in fig. 6, the first locking piece 71 is moved smoothly, the first transmission surface 61 may be an arc surface, and the upper end surface of the first locking piece 71 is also an arc surface.

As shown in fig. 4 to 6, the third locking device includes a third locking pin 91 provided in the first connecting seat 11 and capable of sliding in the first connecting seat, the rotating seat 31 is provided with a first locking groove 92 capable of engaging with or disengaging from the third locking pin 91 and preventing the push rod assembly 3 from rotating forward when engaging with the third locking pin, the third locking device further includes a driving assembly 93 provided in the push rod assembly 3 and capable of driving the third locking pin 91 to disengage from the first locking groove 92, the rotating seat 31 is further provided with a second locking groove 94 capable of engaging with or disengaging from an upper end of the first locking block 71 and preventing the push rod assembly 3 from rotating backward when engaging with the third locking pin 91, an upper side wall of the second locking groove 94 abuts against an upper end of the first locking block 71, a rear side wall of the second locking groove 94 abuts against a side surface of the first locking block 71, the first transmission surface 61 is formed by an upper side wall of the second locking groove 94, a third return spring 95 capable of pushing the third latch pin 91 to return is further disposed in the first connecting seat 11. When the frame of the baby carriage is in the unfolded state, the third locking pin 91 is positioned in the first locking groove 92, the first locking block 71 is positioned in the second locking groove 94, the third locking pin 91 is matched with the first locking groove 92, so that the push rod assembly 3 cannot rotate forwards, and the first locking block 71 is matched with the second locking groove 94, so that the push rod assembly 3 cannot rotate backwards, and the unfolded state of the frame of the baby carriage is maintained. When the baby carriage needs to be folded, the third latch pin 91 is pushed out of the first latch slot 92 by the driving component 93, and the push rod component 3 can be rotated forwards to fold the baby carriage.

As shown in fig. 5, an inner hole (not shown) is formed in the first connecting seat 11, a bracket 96 capable of sliding in the inner hole is inserted into the inner hole, the third latch pin 91 is disposed on the bracket 96, and the third return spring 95 is disposed between the bottom of the inner hole and the bracket 96.

As shown in fig. 5, the driving assembly 93 includes a driving block 931 capable of moving in the rotating seat 31 to push the third locking pin 91 to disengage from the first locking groove 92, a chute 932 is disposed on the driving block 931, a strip-shaped groove 933 communicating with the chute 932 is disposed on the rotating seat 31 along the second axis B direction, a driving pin 934 penetrates through the strip-shaped groove 933 and the chute 932, and a cable 935 connected to the driving pin 934 and capable of pulling the driving pin 934 to move to push the driving block 931 to move is disposed in the outer supporting rod 32. When the cable 935 pulls the driving pin 934, the driving pin 934 pushes the groove wall of the inclined groove 932 when moving transversely, so that the driving block 931 can move longitudinally in the rotating seat 31, and then the driving block 931 pushes the third locking pin 91 to disengage from the first locking groove 92, so that the third locking device is unlocked.

As shown in fig. 5 and 7, a hand push rod 33 capable of extending and retracting in the outer support rod 32 is further disposed in the outer support rod 32, a fixed seat 34 is disposed in the outer support rod 32, a sliding seat 936 capable of being impacted by the lower end of the hand push rod 33 and sliding relative to the fixed seat 34 when the hand push rod 33 retracts into the outer support rod 32 is disposed in the fixed seat 34, and the pulling 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 downwards, the sliding seat 936 moves downwards, and because the pulling cable 935 is connected to the sliding seat 936 around the fixed shaft 35, the sliding seat 936 moves downwards to enable the pulling cable 935 to pull the driving pin 934 to move transversely, which is a skillful design.

As shown in fig. 1, 5, 8 and 9, the seat support 4 is further connected with a seat assembly 50 capable of rotating relative to the seat support, a positioning device is arranged between the seat assembly 50 and the seat support 4, the positioning device comprises a positioning groove arranged on the seat support 4, the positioning groove comprises a first positioning groove 501 and a second positioning groove 502 which enable the seat assembly 50 to stay in the forward direction and the backward direction, the positioning groove further comprises a third positioning groove 503 which enables the seat assembly 50 to stay in the oblique forward direction, and the seat assembly 50 is provided with positioning pins (not shown) which can be respectively engaged with or disengaged from the first positioning groove 501, the second positioning groove 502 and the third positioning groove 503. Through first constant head tank 501 and second constant head tank 502 cooperation with the locating pin respectively, can change the front and back orientation of seat subassembly 50, and third constant head tank 503 cooperates with the locating pin can be with seat subassembly 50 oblique the place ahead, and this orientation is particularly suitable for the children of taking in seat subassembly 50 and vwatchs the animal on the edge of zoo glass, makes the bassinet side more be close to the zoo glass again when can making children openly vwatch the animal, makes children be as close as possible to the animal, is convenient for vwatch.

As shown in fig. 8 and 9, the handle bar 33 is further provided with a support portion 60 that can be supported on the ground when the stroller is folded to maintain the stroller in a standing state.

Claims

1. A stroller frame movable from an unfolded position to a folded position, characterized in that: 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 respectively provided with a wheel (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) which is rotatably connected with the first connecting seat (11) around a first axis (A), the first connecting seat (11) is also connected with a push rod component (3) and a seat supporting piece (4), the push rod component (3) and the first connecting seat (11) are rotatably connected around a second axis (B), the seat supporting piece (4) is rotatably connected with the first connecting seat (11) around a third axis (C), and a first clamping device for locking the first supporting leg (1) and the second supporting leg (2) is arranged in a space surrounded by the first connecting seat (11) and the second connecting seat (21), seat support piece (4) and first connecting seat (11) enclose be equipped with the second kayser device that is used for locking the two in the space, first connecting seat (11) in still be equipped with and be used for its third kayser device with push rod assembly (3) locking, and push rod assembly (3) on be equipped with behind the unblock of third kayser device and push rod assembly (3) transmission medium (6) that enable first kayser device and second kayser device unblock when rotating folding relatively first supporting leg (1).

2. A stroller frame according to claim 1, wherein: push rod subassembly (3) including wear to establish in first connecting seat (11) and can be around second axis (B) pivoted rotation seat (31), rotation seat (31) on be connected with outer vaulting pole (32).

3. A stroller frame according to claim 2, wherein: the first clamping and locking device comprises a first clamping and locking block (71) which can be driven by a transmission piece (6) to slide in a first connecting seat (11), a first clamping and locking groove (72) is formed in the first clamping and locking block (71), a first clamping and locking pin (73) which can be clamped with the first clamping and locking groove (72) and can be separated from the first clamping and locking groove (72) when the first clamping and locking block (71) is pushed by the transmission piece (6) and slides relative to the first connecting seat (11) is arranged on the second connecting seat (21) and deviates from the first axis (A), and a first reset spring (74) which can push the first clamping and locking block (71) to reset is further arranged in the first connecting seat (11).

4. A stroller frame according to claim 3, wherein: the second locking device comprises a second locking pin (81) arranged on the first connecting seat (11), an arc-shaped groove (82) which can allow the second locking pin (81) to relatively slide in is arranged on the seat supporting piece (4), a second locking block (83) which can move transversely in the seat supporting piece (4) and can be matched with the end part of the arc-shaped groove (82) to enclose the second locking pin (81) is also arranged in the seat supporting piece, a sliding block (84) which can be driven by the transmission piece (6) to slide in the seat supporting piece (4) is also arranged in the seat supporting piece (4), when the sliding block (84) slides relative to the seat supporting piece (4), the sliding block (84) pushes the second locking block (83) to move so that the second locking block (83) is disengaged from the second locking pin (81), and a second return spring (85) capable of pushing the second locking block (83) to return is also arranged in the seat supporting piece (4).

5. A stroller frame according to claim 4, wherein: the transmission piece (6) comprises a first transmission surface (61) which is arranged on the outer side wall of the rotating seat (31) and is in butt fit with the upper end of the first clamping and locking block (71), when the rotating seat (31) rotates, the first transmission surface (61) pushes the upper end of the first clamping and locking block (71) to enable the first clamping and locking block (71) to slide relative to the first connecting seat (11), the transmission piece (6) further comprises a second transmission surface (62) arranged on the outer side wall of the rotating seat (31), and in the rotating process of the rotating seat (31), the second transmission surface (62) pushes the lower end of the sliding block (84) to enable the sliding block (84) to slide relative to the seat support (4).

6. A stroller frame according to claim 5, wherein: the third clamping and locking device comprises a third clamping and locking pin (91) which is arranged in the first connecting seat (11) and can slide in the first connecting seat, a first clamping groove (92) which can be clamped or separated from the third clamping and locking pin (91) and can prevent the push rod assembly (3) from rotating forwards when in clamping is arranged on the rotating seat (31), a driving assembly (93) which is arranged in the push rod assembly (3) and can drive the third clamping and locking pin (91) to be separated from the first clamping groove (92), a second clamping groove (94) which can be clamped or separated from the upper end of the first clamping and locking block (71) from rotating backwards when in clamping is arranged on the rotating seat (31), the upper side wall of the second clamping groove (94) is abutted against the upper end of the first clamping and locking block (71), and the rear side wall of the second clamping groove (94) is abutted against the side surface of the first clamping and locking block (71), the first transmission surface (61) is formed by the upper side wall of the second clamping groove (94), and a third return spring (95) capable of pushing the third clamping lock pin (91) to return is further arranged in the first connecting seat (11).

7. A stroller frame according to claim 6, wherein: the first connecting seat (11) is provided with an inner hole, a support (96) capable of sliding in the inner hole is inserted in the inner hole, the third locking pin (91) is arranged on the support (96), and the third return spring (95) is arranged between the bottom of the inner hole and the support (96).

8. A stroller frame according to claim 6, wherein: drive assembly (93) including can remove and promote third bayonet lock (91) and drive block (931) that first bayonet lock (92) break away from in rotating seat (31), drive block (931) on be equipped with chute (932), rotating seat (31) go up along second axis (B) direction be equipped with communicating bar groove (933) of chute (932), bar groove (933) and chute (932) in wear to be equipped with drive round pin (934), outer vaulting pole (32) in be equipped with and drive round pin (934) and be connected and can stimulate drive round pin (934) and remove and promote cable (935) that drive block (931) removed.

9. A stroller frame according to claim 8, wherein: still be equipped with in outer vaulting pole (32) can be in its flexible handspike (33), outer vaulting pole (32) in be equipped with fixing base (34), fixing base (34) in be equipped with can be strikeed by handspike (33) lower extreme and gliding sliding seat (936) of relative fixing base (34) when hand push pole (33) retract in to outer vaulting pole (32), cable (935) walk around fixed axle (35) on fixing base (34) and connect on sliding seat (936).

10. A stroller frame according to claim 1, wherein: seat support piece (4) on still be connected with its pivoted seat subassembly (50) relatively, seat subassembly (50) and seat support piece (4) between be equipped with positioner, positioner including establishing the constant head tank on seat support piece (4), the constant head tank including enabling seat subassembly (50) to stop at first constant head tank (501) and second constant head tank (502) towards the front and towards the rear, the constant head tank still including enabling seat subassembly (50) to stop at third constant head tank (503) towards oblique the place ahead, seat subassembly (50) on be equipped with can with first constant head tank (501), second constant head tank (502) and third constant head tank (503) block respectively or the locating pin that breaks away from.