CN221188720U - Child cart - Google Patents

Abstract

The utility model discloses a child stroller which can move from an unfolding state to a folding state after a locking device is unlocked and comprises front legs, wherein the front legs are rotatably connected with rear legs around a first axis A, the rear legs are rotatably connected with supporting rods capable of rotating relative to the rear legs around a second axis B, connecting rods capable of rotating relative to the supporting rods are arranged between the supporting rods and the front legs, one ends of the connecting rods are rotatably connected with the front legs around a third axis C, the other ends of the connecting rods are rotatably connected with the supporting rods around a fourth axis D, the third axis C is deviated from the first axis A, the fourth axis D is deviated from the second axis B, the front legs are connected with front wheels, and the rear legs are connected with rear wheels. The utility model aims to overcome the defects of the prior art and provide the child stroller which is convenient to fold and operate and small in volume after being folded.

Description

Child cart

[ Field of technology ]

The utility model relates to a child stroller.

[ Background Art ]

At present, the development of the children's barrow on the market is mature, consumers put forth higher requirements on the children's barrow, and the requirements on light weight and small vehicle collection volume are met. Most of the children's carts on the market are heavy and inconvenient to carry and go out. While some vehicle platforms realize lighter weight, the overall structure is not firm, the vehicle storage and display are difficult, and the size is irregular after the vehicle is stored. Therefore, people are very desirous of a portable child stroller frame which is convenient to fold and unfold, simple in structure and small in size after folding.

The utility model further provides a novel embodiment.

[ utility model ]

The utility model aims to overcome the defects of the prior art and provide the child stroller which is convenient to fold and operate and small in volume after being folded.

The utility model is realized by the following technical scheme:

The utility model provides a children's shallow can remove to folding state from the expansion state after unlocking locking device, includes front leg 11, front leg 11 on rotate around first axis A and be connected with back leg 12, back leg 12 on rotate around second axis B and be connected with can rotate relative it vaulting pole 13, vaulting pole 13 and front leg 11 between be equipped with can relative two pivoted connecting rod 14, connecting rod 14 one end rotate around third axis C and be connected on front leg 11, the other end rotates around fourth axis D and be connected on vaulting pole 13, just third axis C skew first axis A sets up, fourth axis D skew second axis B set up, front leg 11 on be connected with front wheel 111, back leg 12 on be connected with rear wheel 121.

The back leg 12 on can dismantle and be connected with mount pad 2, mount pad 2 on be connected with seat 3, seat 3 including rotating the seat portion 31 of connecting on mount pad 2, seat portion 31 on be equipped with back portion 32 and handrail portion 33 that can rotate relative to it, mount pad 2, seat portion 31, back portion 32 and handrail portion 33 between be equipped with can lock the locking subassembly 4 of seat 3 in the state of expanding.

The locking device comprises a locking assembly 5 arranged among a front leg 11, a rear leg 12 and a stay bar 13, and an unlocking part 51 which can enable the locking assembly 5 to be interlocked and unlocked when the seat 3 is folded relative to the mounting seat 2 in a rotating way is arranged on the seat 3.

The locking assembly 5 comprises a first locking position 52 arranged on the front leg 11, a second locking position 53 is arranged on the supporting rod 13, a locking piece 54 which can slide relatively to the rear leg 12 and be simultaneously clamped into the first locking position 52 and the second locking position 53 or simultaneously separated from the first locking position 52 and the second locking position 53 is arranged on the rear leg 12, an elastic piece 55 which can push the locking piece 54 to reset is arranged between the locking piece 54 and the rear leg 12, and an unlocking piece 541 which protrudes out of the rear leg 12 and can be pushed by the unlocking part 51 to enable the locking piece 54 to slide is arranged on the locking piece 54.

The unlocking part 51 comprises an unlocking slide block 511 which is connected to the seat 3 in a sliding manner and can push the unlocking plate 541 to slide when the seat 3 is folded relative to the mounting seat 2 in a rotating manner, a reset element 512 which can push the unlocking slide block 511 to reset is further arranged between the unlocking slide block 511 and the seat 3, a pushing inclined slide surface 5111 is arranged on the unlocking slide block 511, and a pushing protrusion 5411 which can push the pushing inclined slide surface 5111 to enable the unlocking slide block 511 to retract into the seat 3 when the seat 3 is unfolded is arranged on the unlocking plate 541.

The installation seat 2 and the rear leg 12 between be equipped with the kayser subassembly 6 that can lock the two, kayser subassembly 6 including locating the kayser position 61 on the rear leg 12, the installation seat 2 on be equipped with the kayser piece 62 that can slide and block into or break away from kayser position 61 relative to it transversely, the installation seat 2 on still be connected with the operating piece 63 that can slide and push away kayser piece 62 transversely relative to it vertically, kayser piece 62 and installation seat 2 between be equipped with the first elastic element 64 that can push away kayser piece 62 and reset, operating piece 63 and installation seat 2 between be equipped with the second elastic element 65 that can push away operating piece 63 and reset.

The rear leg 12 is provided with a lock protrusion 122 capable of locking the operating member 63 in an unlocked state, the operating member 63 is provided with a first inclined sliding surface 631, the lock protrusion 122 is provided with a second inclined sliding surface 1221, the lock protrusion 122 is provided with a first arc surface 1222, and the operating member 63 is provided with a second arc surface 632.

The novel bicycle is characterized in that a gear adjusting structure 7 capable of adjusting the tilting gear of the backrest 32 relative to the seat 31 is arranged between the seat 31 and the backrest 32, the gear adjusting structure 7 comprises a plurality of adjusting positions 71 arranged on the seat 31, a sliding piece 72 capable of sliding relative to the backrest 32 is arranged on the backrest 32, a clamping part 721 capable of being clamped into the adjusting positions 71 is arranged on the sliding piece 72, an unlocking piece 73 capable of rotating relative to the backrest 32 is arranged on the backrest 32, a stay rope 74 capable of connecting the unlocking piece 73 with the sliding piece 72 is arranged between the unlocking piece 73 and the sliding piece 72, and a spring 75 capable of pushing the sliding piece 72 to return is arranged between the sliding piece 72 and the backrest 32.

The seat part 31 on still be equipped with the backstop portion 311 that can prevent slider 72 forward rotation, unblock piece 73 and back part 32 between be equipped with two locking Assembly 8, two locking Assembly 8 including locating the unblock button 81 on the unblock piece 73, unblock button 81 on be equipped with protruding 811, back part 32 on be equipped with and can be for protruding 811 to step down and make cable 74 pulling slider 72 break away from backstop portion 311 step down the groove 82, unblock button 81 and back part 32 between be equipped with can push away the protruding 811 on the unblock button 81 and the elastic element 83 that step down the groove 82 misplacement, protruding 811 and back part 32 between be equipped with and can pull cable 74 and make the movable space of gear adjustment structure 7 unblock when unblock piece 73 rotates.

The locking assembly 4 comprises a left connecting shell 41 arranged on the seat part 31 and a right connecting shell 42 arranged on the mounting seat 2, spline grooves 43 are formed in the left connecting shell 41 and the right connecting shell 42, a sealing space is formed by surrounding the left connecting shell 41 and the right connecting shell 42, a spline 44 capable of transversely moving in the sealing space and simultaneously clamping with the spline grooves 43 on the left connecting shell 41 and the right connecting shell 42 is arranged in the sealing space, a first return spring 45 is further arranged between the spline 44 and the right connecting shell 42, a pushing part 321 capable of pushing the spline 44 to transversely slide and separate from the spline grooves 43 on the left connecting shell 41 when the backrest part 32 rotates and folds is arranged on the backrest part 32, a yielding space 441 capable of accommodating the pushing part 321 is arranged on the spline 44, a first pushing surface 442 capable of being pushed by the pushing part 321 is further arranged on the yielding space 441, a lug 443 further arranged on the spline 44 is arranged on the backrest part 33, and the lug 33 is provided with a spline groove capable of preventing the lug 33 from rotating and clamping the lug 33.

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

1. When this children's shallow needs folding, unlock locking device earlier, then promote the vaulting pole and rotate the drawing together around second axis B to the back leg, and when the vaulting pole rotates, the vaulting pole just drives the one end activity of connecting rod, the connecting rod still rotates around the relative vaulting pole of fourth axis D when following the vaulting pole activity, the connecting rod other end follows the activity and rotates around the relative foreleg of third axis C, the connecting rod just drives the foreleg and rotates drawing together to the back leg this moment, and when vaulting pole and back leg draw together and foreleg and back leg draw together, whole children's shallow has just accomplished folding. The folding operation of the child cart is simple, and the whole cart can be folded only by pushing the stay bars to draw close to the rear legs after unlocking the locking device, so that the folding operation is very convenient.

2. The unlocking part is used for linking the unlocking device when the seat is folded, and when a child is folded, a person only needs to operate the unlocking of the seat locking assembly and then rotate the seat to fold relative to the mounting seat, so that the unlocking of the locking assembly can be realized, and the unlocking and folding of the whole child are realized.

[ Description of the drawings ]

FIG. 1 is one of the perspective views of the child stroller of the present utility model;

FIG. 2 is a side view of the child stroller of the present utility model;

FIG. 3 is a second perspective view of the child stroller of the present utility model;

FIG. 4 is an enlarged view of area E of FIG. 3;

FIG. 5 is one of the cross-sectional views of the child stroller of the present utility model;

FIG. 6 is a second cross-sectional view of the child stroller of the present utility model;

FIG. 7 is an exploded view of the locking assembly of the child stroller of the present utility model;

FIG. 8 is one of the perspective views of the seat in the child stroller of the present utility model;

FIG. 9 is one of the exploded views of the seat in the child stroller of the present utility model;

FIG. 10 is a second exploded view of the seat of the child stroller of the present utility model;

FIG. 11 is a second perspective view of the seat of the child stroller of the present utility model;

FIG. 12 is a cross-sectional view of a seat and mounting in the child stroller of the present utility model;

Fig. 13 is an enlarged view of region F in fig. 12;

FIG. 14 is a perspective view of a spline in the stroller of the present utility model;

FIG. 15 is one of the perspective views of the back rest of the child stroller of the present utility model;

FIG. 16 is a second perspective view of the back rest of the child stroller of the present utility model;

fig. 17 is a state diagram of the child stroller of the present utility model when folded.

[ Detailed description ] of the invention

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

As shown in fig. 1 to 17, the present utility model provides a stroller capable of moving from an unfolded state to a folded state after unlocking a locking device, comprising a front leg 11, wherein a rear leg 12 is rotatably connected to the front leg 11 around a first axis a, a supporting rod 13 capable of rotating relative to the rear leg 12 is rotatably connected to the rear leg 12 around a second axis B, a connecting rod 14 capable of rotating relative to the supporting rod 13 and the front leg 11 is arranged between the supporting rod 13 and the front leg 11, one end of the connecting rod 14 is rotatably connected to the front leg 11 around a third axis C, the other end of the connecting rod 14 is rotatably connected to the supporting rod 13 around a fourth axis D, the third axis C is arranged offset from the first axis a, the fourth axis D is arranged offset from the second axis B, a front wheel 111 is connected to the front leg 11, and a rear wheel 121 is connected to the rear leg 12.

When this children's shallow needs folding, unlock locking device earlier, then promote vaulting pole 13 and rotate around second axis B to back leg 12 and draw close, and when vaulting pole 13 rotates, vaulting pole 13 just drives the one end activity of connecting rod 14, connecting rod 14 still rotates around fourth axis D relative vaulting pole 13 when following the activity of vaulting pole 13, the connecting rod 14 other end follows the activity and rotates around the relative front leg 11 of third axis C, connecting rod 14 just drives front leg 11 and rotates to draw close to back leg 12 this moment, and when vaulting pole 13 and back leg 12 draw close and front leg 11 and back leg 12 draw close, whole children's shallow just accomplished the folding. The folding operation of the child stroller is simple, and the folding of the whole stroller can be completed only by pushing the stay bar 13 to draw the rear legs 12 after unlocking the locking device, so that the folding operation is very convenient.

As shown in fig. 8, the rear leg 12 is detachably connected with a mounting seat 2, the mounting seat 2 is connected with a seat 3, the seat 3 includes a seat portion 31 rotatably connected to the mounting seat 2, the seat portion 31 is provided with a backrest portion 32 and a armrest portion 33 capable of rotating relative to the seat portion, and a locking assembly 4 capable of locking the seat 3 in an unfolded state is arranged between the seat portion 31, the backrest portion 32 and the armrest portion 33. After unlocking the closure assembly 4, the backrest part 32 and the armrest part 33 can be folded in rotation relative to the seat part 31.

As shown in fig. 7, the locking device includes a locking assembly 5 disposed between a front leg 11, a rear leg 12 and a strut 13, and the seat 3 is provided with an unlocking portion 51 that can unlock the locking assembly 5 in a linkage manner when the seat 3 is folded in a rotation manner relative to the mounting seat 2. The unlocking part 51 is used for linking the unlocking device when the seat 3 is folded, and when a child is folded, a adult only needs to operate the unlocking of the locking assembly 4 of the seat 3 and then rotate the seat 3 to fold relative to the mounting seat 2, so that the locking assembly 5 can be unlocked, and the unlocking and folding of the whole child car are realized.

As shown in fig. 6 to 7, the locking assembly 5 includes a first locking portion 52 disposed on the front leg 11, a second locking portion 53 disposed on the brace 13, a locking portion 54 disposed on the rear leg 12 and capable of sliding relative to the brace and simultaneously being locked in the first locking portion 52 and the second locking portion 53 or simultaneously being separated from the first locking portion 52 and the second locking portion 53, an elastic member 55 disposed between the locking portion 54 and the rear leg 12 and capable of pushing the locking portion 54 to reset, and an unlocking piece 541 disposed on the locking portion 54 and protruding out of the rear leg 12 and capable of being pushed by the unlocking portion 51 to enable the locking portion 54 to slide. The first locking piece 52 and the second locking piece 53 are grooves. The unlocking part 51 on the seat 3 pushes the unlocking piece 541 to slide downwards, the unlocking piece 541 drives the locking piece 54 to slide along the rear leg 12, the locking piece 54 gradually breaks away from the first locking position 52 and the second locking position 53, and at this time, the locking piece 54 does not abut against the front leg 11 and the supporting rod 13 to prevent the front leg 11 and the supporting rod 13 from rotating and folding relative to the rear leg 12.

As shown in fig. 7, the locking member 54 is further provided with a groove 542 into which the connecting rod 14 can be locked. The groove 542 can be used not only to yield the connecting rod 14 but also to bear against the connecting rod 14, avoiding movement of the connecting rod 14 in the deployed state.

As shown in fig. 9, the unlocking portion 51 includes an unlocking slide block 511 slidably connected to the seat 3 and capable of pushing the unlocking plate 541 to slide when the seat 3 is folded relative to the mounting seat 2, a reset element 512 capable of pushing the unlocking slide block 511 to reset is further disposed between the unlocking slide block 511 and the seat 3, a pushing inclined sliding surface 5111 is disposed on the unlocking slide block 511, and a pushing protrusion 5411 capable of pushing the pushing inclined sliding surface 5111 to enable the unlocking slide block 511 to retract into the seat 3 when the seat 3 is unfolded is disposed on the unlocking slide block 541.

When the seat 3 is folded in a rotating manner relative to the mounting seat 2, the unlocking slide block 511 rotates along with the seat 3, and the unlocking slide block 511 gradually abuts against the unlocking piece 541 and pushes the unlocking piece 541 to slide downwards so that the locking piece 54 is separated from the first locking position 52 and the second locking position 53; when the seat needs to be rotated and unfolded, the seat 3 is reversely unfolded, and at the moment, the pushing inclined sliding surface 5111 on the unlocking slide block 511 is gradually contacted with the pushing protrusion 5411 on the unlocking slide block 541, and is retracted into the seat 3 under the pushing of the pushing protrusion 5411, so that the unlocking slide block 541 is prevented from being blocked by the unlocking slide block 511.

As shown in fig. 9 to 13, a latch assembly 6 capable of locking the mounting seat 2 and the rear leg 12 is arranged between the mounting seat 2 and the rear leg 12, the latch assembly 6 comprises a latch position 61 arranged on the rear leg 12, a latch 62 capable of sliding transversely relative to the mounting seat 2 and being clamped in or separated from the latch position 61 is arranged on the mounting seat 2, an operation piece 63 capable of sliding vertically relative to the mounting seat 2 and pushing the latch 62 transversely is also connected to the mounting seat 2, an elastic element 64 capable of pushing the latch 62 to reset is arranged between the latch 62 and the mounting seat 2, a first elastic element 64 capable of pushing the latch 62 to reset is arranged between the latch 62 and the mounting seat 2, and a second elastic element 65 capable of pushing the operation piece 63 to reset is arranged between the operation piece 63 and the mounting seat 2. The mounting seat 2 and the rear leg 12 are locked through the locking assembly 6, so that the mounting seat 2 can be conveniently and quickly mounted on the rear leg 12, and meanwhile, when the seat 3 needs to be taken down and stored separately, the locking assembly 6 only needs to be unlocked. When the operating member 63 is pressed, the operating member 63 slides vertically relative to the mounting seat 2, and when the operating member 63 slides vertically relative to the mounting seat 2, the locking member 62 is pushed to slide laterally relative to the mounting seat 2, at this time, the locking member 62 is gradually separated from the locking position 61, and the mounting seat 2 and the seat 3 can be removed from the rear leg 12.

As shown in fig. 9 to 13, the rear leg 12 is provided with a locking protrusion 122 capable of locking the operating member 63 in an unlocked state, the operating member 63 is provided with a first inclined sliding surface 631, the locking protrusion 122 is provided with a second inclined sliding surface 1221, the locking protrusion 122 is provided with a first arc surface 1222, and the operating member 63 is provided with a second arc surface 632. In order to facilitate the removal of the mount 2 and the seat 3 from the rear leg 12 by a large person, it is necessary to keep the operating member 63 in the unlocked state all the time. When the operating member 63 slides downward, the first inclined surface 631 on the operating member 63 gradually abuts against the second inclined surface 1221 on the lock protrusion 21, and the first inclined surface 631 gradually slides relative to the second inclined surface 211 until the second curved surface 632 on the operating member 63 contacts with and presses against the first curved surface 1222 on the lock protrusion 211, and after the operating member 63 is slightly deformed, the second curved surface 632 and the first curved surface 1222 are separated from each other, and at this time, the lower end portion of the operating member 63 is clamped and fixed with the lock protrusion 122, so that the operating member 63 is kept in the unlocked state all the time. When the occupant pulls the seat 3 upward, the lower end portion of the operating member 63 is slightly deformed by the second curved surface 632 and the first curved surface 1222 being pressed against each other, and at this time, the mounting base 2 is gradually separated from the rear leg 12, and the operating member 63 slides upward to be reset under the pushing of the second elastic member 65.

As shown in fig. 9 to 10, a gear adjusting structure 7 capable of adjusting the tilting gear of the backrest 32 relative to the seat 31 is arranged between the seat 31 and the backrest 32, the gear adjusting structure 7 comprises a plurality of adjusting positions 71 arranged on the seat 31, a sliding piece 72 capable of sliding relative to the backrest 32 is arranged on the backrest 32, a clamping part 721 capable of being clamped into the adjusting positions 71 is arranged on the sliding piece 72, an unlocking piece 73 capable of rotating relative to the backrest is arranged on the backrest 32, a stay rope 74 capable of connecting the unlocking piece 73 and the sliding piece 72 is arranged between the unlocking piece 73 and the sliding piece 72, and a spring 75 capable of pushing the sliding piece 72 to return is arranged between the sliding piece 72 and the backrest 32.

When the backrest 32 needs to be adjusted to incline relative to the seat 31, the unlocking member 73 is pulled, the unlocking member 73 rotates relative to the backrest 32, the stay 74 is driven by the unlocking member 73 to pull the sliding member 72 to slide, the clamping portion 721 on the sliding member 72 is gradually separated from the adjusting position 71, and the backrest 32 can rotate relative to the seat 31 to adjust the incline relative to the seat 31.

As shown in fig. 16, the seat 31 is further provided with a stop portion 311 capable of preventing the sliding member 72 from rotating forward, a secondary locking assembly 8 is disposed between the unlocking member 73 and the backrest 32, the secondary locking assembly 8 includes an unlocking button 81 disposed on the unlocking member 73, the unlocking button 81 is provided with a protrusion 811, the backrest 32 is provided with a yielding groove 82 capable of yielding the protrusion 811 to enable the pulling of the sliding member 72 by the pulling cable 74 out of the stop portion 311, an elastic element 83 capable of pushing the protrusion 811 on the unlocking button 81 to be dislocated with the yielding groove 82 is disposed between the unlocking button 81 and the backrest 32, and a movable space capable of pulling the pulling cable 74 to unlock the gear adjusting structure 7 when the unlocking member 73 rotates is disposed between the protrusion 811 and the backrest 32.

In order to avoid that a person rotates and folds the backrest 32 towards the seat 31 by mistake when adjusting the tilting gear of the backrest 32 and the seat 31, the two-way locking assembly 8 is provided, thereby avoiding misoperation of the person. When the occupant does not unlock the two-way locking assembly 8, the unlocking member 73 can rotate relative to the backrest portion 32 to unlock the gear adjusting structure 7, but at this time, the position of the sliding member 32 is supported by the stop portion 311, and the clamping portion 721 can abut against the stop portion 311 to prevent the backrest portion 32 from rotating and folding forward relative to the seat portion 31 when rotating. A movable space is provided between the protrusion 811 and the backrest portion 32 so that the unlocking member 73 has a sufficient position to unlock the gear position adjusting structure 7. When the seat 3 needs to be folded, the unlocking button 81 is pushed transversely to align the protrusion 811 on the unlocking button 81 with the yielding groove 82, and at this time, the unlocking member 73 has a sufficient rotation distance to pull the stay 74, and the clamping portion 721 on the sliding member 72 is separated from the stopping portion 311

As shown in fig. 9 to 10, the locking assembly 4 includes a left connecting shell 41 disposed on the seat portion 31 and a right connecting shell 42 disposed on the mounting seat 2, spline grooves 43 are disposed in the left connecting shell 41 and the right connecting shell 42, a sealed space is defined between the left connecting shell 41 and the right connecting shell 42, a spline 44 capable of moving laterally therein and simultaneously engaging with the spline grooves 43 of the left connecting shell 41 and the right connecting shell 42 is disposed in the sealed space, a first return spring 45 is disposed between the spline 44 and the right connecting shell 42, a pushing portion 321 capable of pushing the spline 44 to slide laterally and separate from the spline grooves 43 of the left connecting shell 41 when the backrest portion 32 is folded is disposed on the backrest portion 32, a yielding space 441 capable of accommodating the pushing portion 321 is disposed on the backrest portion 4, and a first pushing surface 442 capable of being pushed by the pushing portion 321 is disposed in the yielding space 441.

When the locking assembly 4 needs to be unlocked, the two locking assemblies 8 are unlocked firstly, then the gear adjusting structure 7 is unlocked, the backrest part 32 is rotated forwards, the backrest part 32 is rotated and folded towards the seat part 31, at the moment, the protrusions 321 on the backrest part 32 gradually push the first pushing surfaces 442 on the spline 44 along with rotation, so that the spline 44 is pushed to slide transversely, at the moment, the spline 44 gradually breaks away from the spline grooves 43 on the left connecting shell 41 and enters the right connecting shell 42, and at the moment, the seat part 32 can be rotated and folded relative to the mounting seat 2.

As shown in fig. 9 to 11, the spline 44 is further provided with a protruding bump 443, and the armrest portion 33 is provided with a clamping groove 331 for clamping the protruding bump 441 to prevent the armrest portion 33 from rotating and folding. The protrusion 443 of the spline 44 is also disengaged from the engagement groove 331 of the armrest portion 33 when the spline 44 slides, and the armrest portion 33 can be rotated and folded with respect to the seat portion 31.

As shown in fig. 17, the stay 13 is provided with a push rod 15 which can be slidably unfolded or folded relative to the stay.

Claims (10)

1. A child stroller movable from an unfolded state to a folded state upon unlocking a locking device, characterized in that: including preceding leg (11), preceding leg (11) on rotate around first axis (A) and be connected with back leg (12), back leg (12) on rotate around second axis (B) and be connected with can rotate relative to it vaulting pole (13), vaulting pole (13) and preceding leg (11) between be equipped with can relative two pivoted connecting rod (14), connecting rod (14) one end rotate around third axis (C) and be connected on preceding leg (11), the other end rotates around fourth axis (D) and be connected on vaulting pole (13), just third axis (C) skew first axis (A) set up, fourth axis (D) skew second axis (B) set up, preceding leg (11) on be connected with front wheel (111), back leg (12) on be connected with rear wheel (121).

2. The stroller of claim 1, wherein: the utility model provides a rear leg (12) on can dismantle and be connected with mount pad (2), mount pad (2) on be connected with seat (3), seat (3) including rotating seat portion (31) of being connected on mount pad (2), seat portion (31) on be equipped with back portion (32) and handrail portion (33) that can rotate relative to it, mount pad (2), seat portion (31), back portion (32) and handrail portion (33) between be equipped with locking subassembly (4) that can lock seat (3) in the state of expanding.

3. The stroller of claim 2, wherein: the locking device comprises a locking assembly (5) arranged among a front leg (11), a rear leg (12) and a stay bar (13), and an unlocking part (51) which can enable the locking assembly (5) to be in linkage unlocking when the seat (3) rotates and folds relative to the mounting seat (2) is arranged on the seat (3).

4. A stroller according to claim 3, wherein: the locking assembly (5) comprises a first locking position (52) arranged on a front leg (11), a second locking position (53) is arranged on a supporting rod (13), a locking piece (54) which can slide relatively to the rear leg and be clamped into the first locking position (52) and the second locking position (53) or be separated from the first locking position (52) and the second locking position (53) simultaneously is arranged on the rear leg (12), an elastic piece (55) capable of pushing the locking piece (54) to reset is arranged between the locking piece (54) and the rear leg (12), and an unlocking piece (541) which protrudes out of the rear leg (12) and can be pushed by an unlocking part (51) to enable the locking piece (54) to slide is arranged on the locking piece (54).

5. The stroller of claim 4, wherein: the unlocking part (51) comprises an unlocking slide block (511) which is connected onto the seat (3) in a sliding manner and can push the unlocking plate (541) to slide when the seat (3) rotates and folds relative to the mounting seat (2), a reset element (512) capable of pushing the unlocking slide block (511) to reset is further arranged between the unlocking slide block (511) and the seat (3), a pushing inclined slide surface (5111) is arranged on the unlocking slide block (511), and a pushing protrusion (5411) capable of pushing the pushing inclined slide surface (5111) when the seat (3) is unfolded is arranged on the unlocking plate (541) so that the unlocking slide block (511) is retracted into the seat (3).

6. The stroller of claim 2, wherein: the novel anti-theft lock is characterized in that a locking assembly (6) capable of locking the mounting seat (2) and the rear leg (12) is arranged between the mounting seat and the rear leg (12), the locking assembly (6) comprises a locking position (61) arranged on the rear leg (12), a locking piece (62) capable of transversely sliding relative to the mounting seat and locking or separating from the locking position (61) is arranged on the mounting seat (2), an operating piece (63) capable of vertically sliding relative to the mounting seat and pushing the locking piece (62) transversely sliding is further connected to the mounting seat (2), a first elastic element (64) capable of pushing the locking piece (62) to reset is arranged between the locking piece (62) and the mounting seat (2), and a second elastic element (65) capable of pushing the operating piece (63) to reset is arranged between the operating piece (63) and the mounting seat (2).

7. The stroller of claim 6, wherein: the rear leg (12) on be equipped with can be with the locking arch (122) of operating member (63) locking in the unblock state, operating member (63) on be equipped with first oblique slip face (631), locking arch (122) be equipped with second oblique slip face (1221), locking arch (122) on be equipped with first arcwall face (1222), operating member (63) on be equipped with second arcwall face (632).

8. The stroller of claim 2, wherein: the utility model provides a gear adjusting structure (7) that seat portion (31) and back portion (32) between be equipped with can adjust back portion (32) relative seat portion (31) slope gear, gear adjusting structure (7) including locating a plurality of adjustment positions (71) on seat portion (31), back portion (32) on be equipped with can relative its gliding slider (72), slider (72) on be equipped with joint portion (721) that can block into in adjusting position (71), back portion (32) on be equipped with can relative wherein pivoted unlatch piece (73), unlatch piece (73) and slider (72) between be equipped with cable (74) that can connect the two, slider (72) and back portion (32) between be equipped with spring (75) that can push away slider (72) and reset.

9. The stroller of claim 8, wherein: the seat part (31) on still be equipped with stopper portion (311) that can prevent slider (72) pivoted forward, unlatch piece (73) and back portion (32) between be equipped with two locking Assembly (8), two locking Assembly (8) including locating unlatch button (81) on unlatch piece (73), unlatch button (81) on be equipped with arch (811), back portion (32) on be equipped with and can give way for arch (811) and make cable (74) pulling slider (72) break away from the groove (82) of giving way of stopper portion (311), unlatch button (81) and back portion (32) between be equipped with protruding (811) and the elastic element (83) of groove (82) dislocation that can push away on unlatch button (81), protruding (811) and back portion (32) between be equipped with and can pull cable (74) and make the movable space of gear adjustment structure (7) unblock when unlatch piece (73) rotate.

10. The stroller of claim 2, wherein: the locking assembly (4) comprises a left connecting shell (41) arranged on a seat part (31) and a right connecting shell (42) arranged on a mounting seat (2), spline grooves (43) are formed in the left connecting shell (41) and the right connecting shell (42), a sealing space is formed by enclosing the left connecting shell (41) and the right connecting shell (42), a spline (44) capable of transversely moving in the sealing space and simultaneously clamping with the spline grooves (43) on the left connecting shell (41) and the right connecting shell (42) is arranged in the sealing space, a first return spring (45) is further arranged between the spline (44) and the right connecting shell (42), a pushing part (321) capable of transversely sliding and separating from the spline grooves (43) on the left connecting shell (41) is arranged on the backrest part (32), a yielding space (441) capable of accommodating the spline grooves (321) is arranged on the spline (44), a protruding pushing part (443) is further arranged on the spline (321) and can be pushed by the spline (442), the armrest part (33) is provided with a clamping groove (331) which can be used for clamping the lug (443) to prevent the armrest part (33) from rotating and folding.