CN214776130U

CN214776130U - Baby carriage

Info

Publication number: CN214776130U
Application number: CN202121040879.4U
Authority: CN
Inventors: 平宙
Original assignee: Zhongshan Zetai Household Products Co ltd
Current assignee: Zhongshan Zetai Household Products Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-11-19
Anticipated expiration: 2031-05-14

Abstract

The utility model discloses a baby carriage which can move from an unfolding position to a folding position after a locking device is unlocked; the lower ends of the front legs are connected with front wheel assemblies; the lower ends of the rear legs are connected with rear wheel assemblies, and the rear legs are rotatably connected to the front legs around a first axis A; the lower end of the support rod is rotatably connected with the upper end of the front leg or the upper end of the rear leg around a second axis B; and a linkage piece which can pull the rear leg to move towards the front leg when the support rod rotates towards the front leg and moves towards the front leg is movably arranged between the rear leg and the support rod. The utility model discloses folding operation is very simple and convenient swift, whole perambulator simple structure moreover, low cost is folding back small, very portable.

Description

Baby carriage

[ technical field ] A method for producing a semiconductor device

The utility model relates to a baby carriage.

[ background of the invention ]

Strollers have become an impossible or missing product for infants during their growth. Current strollers are generally collapsible for portability. But the volume of the traditional baby carriage is still larger after being folded, and the folding operation of the whole baby carriage is inconvenient, the structure is more complex and the cost is higher.

Therefore, the present invention is based on the above disadvantages.

[ Utility model ] content

The utility model aims at overcoming the defects of the prior art and providing a baby carriage which is convenient to fold and operate and small in size after being folded.

The utility model discloses a realize through following technical scheme:

a stroller movable from an unfolded position to a folded position after a locking device is unlocked, characterized in that:

the lower ends of the front legs 11 are connected with front wheel assemblies 111;

a rear leg 12, a rear wheel assembly 121 connected to the lower end of the rear leg 12, and the rear leg 12 rotatably connected to the front leg 11 about a first axis a;

the lower end of the support rod 13 is rotatably connected with the upper end of the front leg 11 or the upper end of the rear leg 12 around a second axis B;

a linkage part 14 which can pull the rear leg 12 to approach the front leg 11 when the stay bar 13 rotates to approach the front leg 11 is movably arranged between the rear leg 12 and the stay bar 13.

The stroller as described above, characterized in that: the stay 13 includes a rod body 131 and a stay seat 132 connected to the rod body 131, the rear leg 12 includes a rear leg rod 122 and a rear leg seat 123 connected to the rear leg rod 122, the lower end of the link 14 is rotatably connected to the eccentric position on the rear leg seat 123 around a third axis C, and the upper end of the link 14 is rotatably connected to the eccentric position on the stay seat 132 around a fourth axis D.

The stroller as described above, characterized in that: the front leg 11 comprises a front leg rod 112 and a front leg seat 113 connected to the upper end of the front leg rod 112, the rear leg seat 123 is rotatably connected to the front leg seat 113 around a first axis a, the supporting rod seat 132 is rotatably connected to the front leg seat 113 around a second axis B, and the linkage 14 is connected to the front leg seat 113.

The stroller as described above, characterized in that: locking device 2 locate and to lock the two each other between vaulting pole seat 132 and preceding leg base 113, locking device 2 including locating joint position 21 on preceding leg base 113, vaulting pole seat 132 on be equipped with relative its slip and with joint position 21 joint or the locking piece 22 that breaks away from, locking piece 22 on still be connected with and to stimulate the gliding first cable 23 of locking piece 22, locking piece 22 and vaulting pole seat 132 between be equipped with and to make the two keep the elastomer component 24 of locking state, vaulting pole 13 on still be connected with handspike 15, handspike 15 on be equipped with and to stimulate first cable 23 and make the locking piece 22 break away from first unblock piece 151 from joint position 21.

The stroller as described above, characterized in that: the seat assembly 3 is further connected to the front legs 11, the seat assembly 3 comprises a seat frame 31 connected to the front legs 11 and a backrest frame 32 rotatably connected to the seat frame 31 around a fifth axis E, and the seat frame 31 is further provided with a grab bar 4 rotatably connected to the seat frame 31 around a sixth axis F.

The stroller as described above, characterized in that: the seat frame 31 comprises a connecting seat 311 detachably connected with the front leg 11, a seat rod fixing seat 312 rotatably connected to the connecting seat 311 around a seventh axis G, and a seat rod 313 connected to the seat rod fixing seat 312, the back frame 32 comprises a back rod 321 and a back rod fixing seat 322 connected to the back rod 321 and rotatably connected to the seat rod fixing seat 312, a first locking device 5 capable of locking the seat rod fixing seat 312 and the connecting seat 311 with each other is arranged between the seat rod fixing seat 312 and the connecting seat 311, a second locking device 6 capable of locking the seat rod fixing seat 312 and the back rod fixing seat 4 with each other is arranged between the seat rod fixing seat 312 and the back rod fixing seat 322, a third locking device 7 capable of locking the seat rod fixing seat 312 and the back rod fixing seat 322 with each other is arranged between the seat rod fixing seat 312 and the back rod fixing seat 322, and when the third locking device 7 is unlocked and the back frame 32 is rotatably folded relative to the seat frame 31, the back rod fixing seat 322 drives the first locking device 5 and the second locking device 6 to be unlocked so that the back rod fixing seat 7 is locked with the back rod fixing seat 74 and the seat post 313 rotate toward the front leg 11.

The stroller as described above, characterized in that: a locking mechanism 8 capable of locking the connecting seat 311 and the front leg 11 is arranged between the two.

The stroller as described above, characterized in that: the locking mechanism 8 comprises a locking position 81 arranged on the front leg 11 and an operating element 82 slidably arranged on the connecting seat 311, wherein the operating element 82 is provided with a locking part 821 which can be clamped into the locking position 81 to lock the front leg 11 and the connecting seat 311, and an elastic element 83 which can enable the locking part 821 to keep a locking state is arranged between the operating element 82 and the connecting seat 311;

a delay locking device 9 is further arranged between the operating element 82 and the front leg 11, the delay locking device 9 comprises a protruding part 91 arranged on the front leg 11 and a rotating element 92 rotatably connected to the operating element 82 around an eighth axis H, a pressing part 921 is arranged on the rotating element 92 and can be mutually pressed against the protruding part 91 after the operating element 82 is operated so that the locking part 821 keeps a separated state, an elastic resetting element 93 capable of resetting the rotating element 92 is arranged between the rotating element 92 and the operating element 82, and a first inclined sliding surface 9211 capable of being matched with the protruding part 91 to slide when the operating element 82 transversely slides relative to the connecting seat 311 is arranged on the pressing part 921.

The stroller as described above, characterized in that: the seat bar fixing seat 312 is internally provided with a transverse jacking part 64 which can transversely slide relative to the seat bar fixing seat 312 to push out the clamping piece 61 from the locking position 62 when being jacked by the jacking sliding block 63, the clamping piece 61 can be kept in a clamping state between the clamping piece 61 and the seat bar fixing seat 4, and a second elastic element 65 which can push the jacking sliding block 63 to reset the jacking sliding block 63 is also arranged between the jacking sliding block 63 and the seat bar fixing seat 312 And an elastic element 66.

The stroller as described above, characterized in that: the first locking device 5 includes a plurality of fixing locations 51 disposed on the connecting base 311 and a fixing engaging portion 52 disposed on the pressing slider 63 and capable of engaging with the plurality of fixing locations 51 to prevent the seat bar fixing base 312 from rotating relative to the connecting base 311 when the first locking device 5 is not unlocked.

Compared with the prior art, the utility model discloses there is following advantage:

1. the utility model discloses the perambulator is when folding, at first unblock locking device, then promote the vaulting pole and rotate to draw close to the foreleg, and the vaulting pole activity is followed to the one end of linkage piece when the vaulting pole rotates and make the other end pulling back leg of linkage piece rotate to draw close to the foreleg, thereby accomplish the folding of perambulator, need not draw close to the foreleg with the hand pulling back leg among the whole folding process and just can realize the folding of whole perambulator, operate simple and convenient swift very, and whole perambulator simple structure, therefore, the carrier wave prepaid electric energy meter is low in cost, after folding small, and the carrying is very convenient.

2. The utility model provides a when seat subassembly needs to be folded, at first unblock third locking device, then promote the back pole, the back pole drives the back pole fixing base of its lower extreme and rotates, back pole fixing base rotates with relative seat pole fixing base this moment to when the back pole fixing base rotates, can order about first locking device and second locking device unblock, after first locking device and second locking device unblock, the handrail pole just draws close folding with the seat pole forward leg pole. The unlocking of the second locking device and the first locking device can be realized only by rotating the backrest rod fixing seat, and the unlocking is convenient for a user.

[ description of the drawings ]

Fig. 1 is a perspective view of the stroller of the present invention;

fig. 2 is a side view of the stroller of the present invention;

fig. 3 is a state diagram of the stroller of the present invention when folded;

FIG. 4 is a view showing the front legs, rear legs, stay bars and linkage members of the stroller of the present invention in a rotated and folded state;

fig. 5 is an exploded view of the locking device of the stroller of the present invention;

FIG. 6 is a perspective view of the seat assembly of the stroller of the present invention;

FIG. 7 is one of the exploded views of the seat assembly and front legs of the stroller of the present invention;

FIG. 8 is a second exploded view of the seat assembly and front legs of the stroller of the present invention;

FIG. 9 is a cross-sectional view of the locking mechanism and the delayed latch mechanism of the stroller of the present invention;

FIG. 10 is a perspective view of the operating member and the rotating member of the stroller of the present invention;

FIG. 11 is one of the exploded views of the third latch mechanism of the stroller of the present invention;

fig. 12 is a second exploded view of the third locking device of the stroller of the present invention;

fig. 13 is one of exploded views of the first locking device of the stroller of the present invention;

fig. 14 is a second exploded view of the first closure of the stroller of the present invention;

fig. 15 is a cross-sectional view of a second locking device of the stroller of the present invention;

fig. 16 is a perspective view of the top pressure slider and the backrest rod fixing seat in the baby carriage of the present invention;

fig. 17 is a perspective view of the seat assembly of the stroller of the present invention when folded;

fig. 18 is a perspective view of the stroller of the present invention when folded;

fig. 19 is a side view of the stroller of the present invention when folded.

[ detailed description ] embodiments

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1 to 19, the present invention provides a stroller, which can be moved from a deployed position to a folded position after a locking device is unlocked,

The utility model discloses when folding, at first unblock locking device, then promote vaulting pole 13 and rotate to draw close to preceding leg 11, and the one end of linkage 14 when vaulting pole 13 rotates is followed the activity of vaulting pole 13 and is made the other end pulling back leg 12 of linkage 14 rotate to preceding leg 11 and draw close to, thereby accomplish the folding of perambulator, need not draw close to just can realize the folding of whole perambulator to preceding leg 11 with hand pulling back leg 12 among the whole folding process, operate simple and convenient swift very, and whole perambulator simple structure, therefore, the carrier wave prepaid electric energy meter is low in cost, after folding, small, and very portable.

As shown in fig. 4, the stay 13 includes a rod body 131 and a stay seat 132 connected to the rod body 131, the rear leg 12 includes a rear leg rod 122 and a rear leg seat 123 connected to the rear leg rod 122, the lower end of the link 14 is rotatably connected to an eccentric position on the rear leg seat 123 around a third axis C, and the upper end of the link 14 is rotatably connected to an eccentric position on the stay seat 132 around a fourth axis D. When the stroller is folded, the rotating stay bar 13 drives the upper end of the linkage 14 to move, so that the lower end of the linkage 14 drives the rear leg rod 122 to move closer to the front leg rod 112, and the stroller is flexible to fold.

As shown in fig. 4, the front leg 11 includes a front leg rod 112 and a front leg seat 113 connected to an upper end of the front leg rod 112, the rear leg seat 123 is rotatably connected to the front leg seat 113 about a first axis a, the stay seat 132 is rotatably connected to the front leg seat 113 about a second axis B, and the linkage 14 is connected to the front leg seat 113. When the supporting rod seat 132 rotates around the second axis B relative to the front leg seat 113, the upper end of the linkage 14 rotates along with the supporting rod seat 132 and drives the lower end of the linkage 14 to move, and when the lower end of the linkage 14 moves, the lower end of the linkage 14 drives the rear leg seat 123 to rotate around the first axis a relative to the front leg seat 113 so that the rear leg seat 123 drives the rear leg rod 122 to rotate, and the rear leg rod 122 is driven by the rear leg seat 123 to rotate and approach the front leg rod 112.

As shown in fig. 5, the locking device 2 is disposed between the supporting rod seat 132 and the front leg seat 113 and can lock the supporting rod seat 132 and the front leg seat 113 with each other, the locking device 2 includes a clamping position 21 disposed on the front leg seat 113, the supporting rod seat 132 is provided with a locking member 22 capable of sliding relative to the supporting rod seat and clamping or disengaging with the clamping position 21, the locking member 22 is further connected with a first cable 23 capable of pulling the locking member 22 to slide, the locking member 22 and the supporting rod seat 132 are provided with an elastic element 24 capable of keeping the locking member and the supporting rod seat in a locking state, the supporting rod 13 is further connected with a hand push rod 15, the hand push rod 15 is provided with a first unlocking member 151 capable of pulling the first cable 23 and disengaging the locking member 22 from the clamping position 21.

When the stroller needs to be folded, firstly, the first unlocking piece 151 on the push rod 15 is pressed, the first unlocking piece 151 pulls the first pulling rope 23 to move upwards, the first pulling rope 23 can pull the locking piece 22 to move upwards when moving, the locking piece 22 is separated from the clamping position 21 on the front leg seat 113 when moving upwards, at the moment, the locking device 2 is unlocked, and the push rod 15 can drive the rod body 131 and the support rod seat 132 to rotate relative to the front leg seat 113 and draw close to the front leg rod 112 to be folded.

As shown in fig. 6 and 17, the front leg 11 is further connected with a seat assembly 3, the seat assembly 3 includes a seat frame 31 connected to the front leg 11 and a back frame 32 rotatably connected to the seat frame 31 about a fifth axis E, and the seat frame 31 is further provided with a grab bar 4 rotatably connected thereto about a sixth axis F. Of course, instead of providing the seat unit 3 to the front leg 11, a flexible seat pocket may be attached to the stay 13, and the infant may be seated in the seat pocket.

As shown in fig. 6 to 17, the seat frame 31 includes a connecting seat 311 detachably connected to the front leg 11, a seat rod fixing seat 312 rotatably connected to the connecting seat 311 about a seventh axis G, and a seat rod 313 connected to the seat rod fixing seat 312, the back frame 32 includes a back rod 321 and a back rod fixing seat 322 connected to the back rod 321 and rotatably connected to the seat rod fixing seat 312, a first locking device 5 capable of locking the seat rod fixing seat 312 and the connecting seat 311 to each other is disposed between the seat rod fixing seat 312 and the connecting seat 311, a second locking device 6 capable of locking the seat rod fixing seat 312 and the handle rod fixing seat 4 to each other is disposed between the seat rod fixing seat 312 and the back rod fixing seat 312, a third locking device 7 capable of locking the seat rod fixing seat 312 and the back rod fixing seat 322 to each other is disposed between the third locking device 7 and the back frame 32 is rotatably folded with respect to the seat frame 31, the backrest rod fixing seat 322 drives the first locking device 5 and the second locking device 6 to unlock, so that the grab bar 4 and the seat rod 313 rotate towards the front legs 11. When the seat assembly 3 needs to be folded, the third locking device 7 is unlocked, then the backrest rod 321 is pushed, the backrest rod 321 drives the backrest rod fixing seat 322 at the lower end of the backrest rod 321 to rotate, at this time, the backrest rod fixing seat 322 rotates relative to the seat rod fixing seat 312, and when the backrest rod fixing seat 322 rotates, the first locking device 5 and the second locking device 6 can be driven to unlock, and after the first locking device 5 and the second locking device 6 are unlocked, the backrest rod 321 rotates and pushes the grab bar 4 and the seat rod 313 to be folded towards the front leg rod 112. The unlocking of the second locking device 6 and the first locking device 5 can be realized only by the rotation of the backrest rod fixing seat 322, and the unlocking is convenient for users.

As shown in fig. 7 to 9, a locking mechanism 8 is disposed between the connecting seat 311 and the front leg 11 for locking the two.

As shown in fig. 9, the locking mechanism 8 includes a locking position 81 provided on the front leg 11 and an operating member 82 slidably provided on the connecting seat 311, the operating member 82 is provided with a locking portion 821 capable of being locked into the locking position 81 to lock the front leg 11 and the connecting seat 311, and an elastic member 83 capable of keeping the locking portion 821 in a locking state is further provided between the operating member 82 and the connecting seat 311. When the seat assembly 3 needs to be detached from the front leg 11, the locking mechanism 8 needs to be unlocked, the operating member 82 on the connecting seat 311 is pressed, the operating member 82 presses the elastic member 83, so that the latch portion 821 on the operating member 82 is disengaged from the latch position 81 on the front leg 11, and at this time, the locking mechanism 8 is unlocked, and the seat assembly 3 can be detached from the front leg 11.

As shown in fig. 9 and 10, a delay latch 9 is further disposed between the operating element 82 and the front leg 11, the delay latch 9 includes a protrusion 91 disposed on the front leg 11 and a rotating element 92 rotatably connected to the operating element 82 around an eighth axis H, the rotating element 92 is provided with a pressing portion 921 capable of pressing against the protrusion 91 after the operating element 82 is operated to keep the latching portion 821 in a disengaged state, an elastic restoring element 93 capable of restoring the rotating element 92 is disposed between the rotating element 92 and the operating element 82, and the pressing portion 921 is provided with a first inclined sliding surface 9211 capable of sliding in cooperation with the protrusion 91 when the operating element 82 slides transversely relative to the connecting seat 311. The elastic return member 93 is a torsion spring.

When the operating element 82 is operated, the operating element 82 slides transversely relative to the front leg 11, so that when the operating element 82 slides transversely, the first inclined sliding surface 9211 on the rotating element 92 gradually contacts the protruding part 91 and is pressed by the protruding part 91, so that the rotating element 92 rotates upwards relative to the operating element 82 around the eighth axis H, the pressing part 921 on the rotating element 92 is disengaged from the protruding part 91 in the process of transverse movement of the operating element 82, the elastic resetting element 93 resets the rotating element 92, and the locking part 821 on the operating element 82 is kept in a state of being disengaged from the locking position 81 due to mutual abutting of the protruding part 91 and the pressing part 921, and the locking mechanism 8 is always in an unlocked state, so that a user can conveniently remove the seat assembly 3 from the front leg 11 without continuously pressing the operating element 82, and the use is more convenient.

As shown in fig. 11 and 12, the third locking device 7 includes a right hinge shell 71 disposed on the seat rod fixing seat 312 and a left hinge shell 72 disposed on the back rod fixing seat 322 and rotatably connected to the right hinge shell 71, a cavity 73 is defined between the left hinge shell 72 and the right hinge shell 71, spline grooves 74 are respectively disposed on inner walls of the left hinge shell 72 and the right hinge shell 71, a spline 75 is disposed in the cavity 73, a pressing member 76 capable of pushing the spline 75 to slide transversely to disengage from the spline groove 74 on the left hinge shell 72 is disposed between the spline 75 and the left hinge shell 72, a second pressing member 78 capable of pressing the spline 75 to simultaneously engage with the spline grooves 74 on the left hinge shell 72 and the right hinge shell 72 when the stroller is in the unfolded state is disposed between the spline 75 and the right hinge shell 71, and a pulling cable 76 is disposed on the pressing member 76 to pull the spline 76 to disengage the left hinge shell 72, the backrest rod 321 is provided with a second unlocking part 79 capable of pulling the second cable 78, the top pressing part 76 is provided with a second inclined sliding surface 761, and the left hinge shell 72 is internally provided with a third inclined sliding surface 721 capable of sliding in cooperation with the second inclined sliding surface 761.

When the stroller is folded, the seat assembly 3 is folded first, when the seat assembly 3 is folded, the third locking device 7 is unlocked first, the second unlocking piece 79 of the back lever 321 is pulled first, the second unlocking piece 79 drives the second cable 78 to move upwards, when the second cable 78 moves upwards, the jacking piece 76 moves, the second oblique sliding surface 761 on the jacking piece 76 is matched with the third oblique sliding surface 721 in the left hinge shell 72, so that the jacking piece 76 can push the spline 75 to move transversely, when the spline 75 moves transversely, the spring 77 is compressed and can be separated from the spline groove 74 on the left hinge shell 72 to enter the right hinge shell 71, at this time, the third locking device 7 is unlocked, and the back lever fixing seat 322 can rotate relative to the seat lever fixing seat 312, so that the back lever 321 can be folded towards the handrail lever 4.

As shown in fig. 14 to 16, the grab bar 4 is provided with a connecting portion 41 rotatably connected to the seat bar fixing seat 312 about a sixth axis F, the second locking device 6 includes a locking member 61 slidably disposed on the grab bar 4 and a locking position 62 disposed on the seat frame 31 and allowing the locking member 61 to be inserted or removed, the seat bar fixing seat 312 is further provided with a pressing slider 63 capable of being pressed by the back bar fixing seat 322 during rotation of the back bar fixing seat 322 and moving longitudinally relative to the seat bar fixing seat 312, the seat bar fixing seat 312 is further provided with a transverse pressing member 64 capable of transversely sliding relative to the seat bar fixing seat 312 to push the locking member 61 out of the locking position 62 when being pressed by the pressing slider 63, a first elastic element 65 capable of keeping the locking member 61 in a locked state is further disposed between the locking member 61 and the grab bar 4, a second elastic element 66 capable of pressing and resetting the pressing slide block 63 is further arranged between the pressing slide block 63 and the seat rod fixing seat 312. The top press sliding block 63 is provided with a fourth inclined sliding surface 631, and the transverse top press member 64 is provided with a fifth inclined sliding surface 641 which can slide in cooperation with the fourth inclined sliding surface 631. The lower end of the top pressing slide block 63 is provided with a sixth inclined sliding surface 632, and the backrest rod fixing seat 322 is further provided with a top pressing sliding surface 3221 which can push against the sixth inclined sliding surface 632 to push the top pressing slide block 63 to longitudinally slide in the process of rotating relative to the seat rod fixing seat 312. The first elastic element 65 and the second elastic element 66 are springs.

During the rotation of the back lever fixing seat 322, the pushing sliding surface 3221 on the back lever fixing seat 322 gradually contacts with the sixth inclined sliding surface 632 at the lower end of the pushing sliding block 63 and pushes against the pushing sliding block 63 to move upward, the pushing sliding block 63 compresses the second elastic element 66 when moving upward, and the pushing sliding block 63 pushes the pushing transverse pushing member 64 to slide transversely relative to the seat lever fixing seat 312 when moving upward through the cooperation of the fourth inclined sliding surface 631 on the pushing sliding block 63 and the fifth inclined sliding surface 641 on the transverse pushing member 64, the locking member 61 is pushed out from the locking position 62 when the transverse pushing member 64 slides, at this time, the second locking device 6 is unlocked, at this time, the back lever 321 can push the armrest lever 4 to rotate toward the seat lever 313 when the back lever 4 approaches toward the seat lever 313, or the armrest lever 4 automatically approaches toward the seat lever 313 under its own gravity.

As shown in fig. 15, the first locking device 5 includes a plurality of fixing locations 51 disposed on the connecting base 311 and a fixing engaging portion 52 disposed on the pressing slider 63 and capable of engaging with the plurality of fixing locations 51 to prevent the seat bar fixing base 312 from rotating relative to the connecting base 311 when the first locking device 5 is not unlocked. When the pressing slider 63 moves upward, the fixing engaging portion 52 on the pressing slider 63 is disengaged from the fixing position 51 on the connecting seat 311, and at this time, the first locking device 5 is unlocked, so that the entire seat rod fixing seat 312 can rotate relative to the connecting seat 311, so that when the seat assembly 3 is folded, as long as the first locking device 5 and the second locking device 6 are driven to be unlocked by the backrest fixing seat 322, the seat rod 313 and the armrest rod 4 can be drawn toward the front leg rod 112, thereby realizing the folding of the seat assembly 3.

As shown in fig. 19, the rear leg 12 is provided with a hook 124, the hook 124 is provided with a hook hole 1241, and the stay 13 is provided with a fastening member 133 capable of fastening or detaching from the hook hole 1241. After the stroller is folded, the clip 133 on the stay bar 13 is clipped into the hanging buckle hole 1241, so as to lock the rear leg 12 and the stay bar 13, thereby avoiding the misoperation and unfolding the stroller.

Claims

1. A stroller movable from an unfolded position to a folded position after a locking device is unlocked, characterized in that:

the lower ends of the front legs (11) are connected with front wheel assemblies (111);

the lower end of the rear leg (12) is connected with a rear wheel assembly (121), and the rear leg (12) is rotatably connected to the front leg (11) around a first axis (A);

the lower end of the support rod (13) is rotatably connected with the upper end of the front leg (11) or the upper end of the rear leg (12) around a second axis (B);

a linkage part (14) which can pull the rear leg (12) to approach the front leg (11) when the stay bar (13) rotates towards the front leg (11) and approaches is movably arranged between the rear leg (12) and the stay bar (13).

2. The stroller of claim 1, wherein: vaulting pole (13) including the body of rod (131) and connect vaulting pole seat (132) on the body of rod (131), back leg (12) include back leg pole (122) and connect back leg seat (123) on back leg pole (122), linkage (14) lower extreme around third axis (C) rotationally connect the eccentric position on back leg seat (123), just linkage (14) upper end around fourth axis (D) rotationally connect the eccentric position on vaulting pole seat (132).

3. The stroller of claim 2, wherein: the front leg (11) comprises a front leg rod (112) and a front leg seat (113) connected to the upper end of the front leg rod (112), the rear leg seat (123) is rotatably connected into the front leg seat (113) around a first axis (A), the supporting rod seat (132) is rotatably connected onto the front leg seat (113) around a second axis (B), and the linkage piece (14) is connected into the front leg seat (113).

4. The stroller of claim 3, wherein: locking device (2) locate and to lock the two each other between vaulting pole seat (132) and preceding leg seat (113), locking device (2) including locating joint position (21) on preceding leg seat (113), vaulting pole seat (132) on be equipped with relatively its slip and with joint position (21) joint or locking piece (22) that break away from, locking piece (22) on still be connected with and to stimulate gliding first cable (23) of locking piece (22), locking piece (22) and vaulting pole seat (132) between be equipped with and to make the two keep the elastomer component (24) of locking state, vaulting pole (13) on still be connected with handspike (15), handspike (15) on be equipped with and to stimulate first cable (23) and make locking piece (22) from the first unlocking piece (151) that joint position (21) breaks away from.

5. The stroller according to any one of claims 1 to 4, wherein: the chair is characterized in that the front legs (11) are also connected with a chair assembly (3), the chair assembly (3) comprises a seat frame (31) connected to the front legs (11) and a backrest frame (32) rotatably connected to the seat frame (31) around a fifth axis (E), and the seat frame (31) is further provided with a handrail rod (4) rotatably connected to the seat frame around a sixth axis (F).

6. The stroller of claim 5, wherein: the seat frame (31) comprises a connecting seat (311) detachably connected with the front leg (11), a seat rod fixing seat (312) rotatably connected to the connecting seat (311) around a seventh axis (G) and a seat rod (313) connected to the seat rod fixing seat (312), the backrest frame (32) comprises a backrest rod (321) and a backrest rod fixing seat (322) connected to the backrest rod (321) and rotatably connected with the seat rod fixing seat (312), a first locking device (5) capable of locking the backrest rod fixing seat (312) and the connecting seat (311) mutually is arranged between the seat rod fixing seat (312) and the connecting seat (311), a second locking device (6) capable of locking the armrest rod (4) and the seat rod fixing seat (312 mutually is arranged between the seat rod fixing seat (312) and the backrest rod fixing seat (322), a third locking device (7) capable of locking the backrest rod fixing seat (312) and the backrest rod fixing seat (322) mutually is arranged between the seat rod fixing seat (312) and the backrest rod fixing seat, when the third locking device (7) is unlocked and the backrest frame (32) is rotated and folded relative to the seat frame (31), the backrest rod fixing seat (322) drives the first locking device (5) and the second locking device (6) to be unlocked so that the grab bar (4) and the seat rod (313) rotate towards the front legs (11) to be close.

7. The stroller of claim 6, wherein: a locking mechanism (8) capable of locking the connecting seat (311) and the front leg (11) is arranged between the connecting seat and the front leg.

8. The stroller of claim 7, wherein: the locking mechanism (8) comprises a locking position (81) arranged on the front leg (11) and an operating part (82) slidably arranged on the connecting seat (311), the operating part (82) is provided with a locking part (821) which can be clamped into the locking position (81) to lock the front leg (11) and the connecting seat (311), and an elastic part (83) which can enable the locking part (821) to keep a locking state is arranged between the operating part (82) and the connecting seat (311);

the operating piece (82) and the front leg (11) between still be equipped with delay kayser device (9), delay kayser device (9) including locate bulge (91) of front leg (11) and rotatable rotate piece (92) of connecting on operating piece (82) around eighth axis (H), rotate piece (92) on be equipped with can push up with bulge (91) each other after operating piece (82) is operated and lean on and make kayser portion (821) keep top splenium (921) of disengagement state, rotate piece (92) and operating piece (82) between be equipped with the elasticity that can make rotate piece (92) reset and reset spare (93), just top splenium (921) on be equipped with can with bulge (91) cooperation gliding first oblique slip face (9211) when operating piece (82) transversely slide relative connecting seat (311).

9. The stroller of claim 6, wherein: the seat rod fixing seat is characterized in that a connecting part (41) which is rotatably connected into the seat rod fixing seat (312) around a sixth axis (F) is arranged on the armrest rod (4), the second locking device (6) comprises a locking piece (61) which is slidably arranged on the armrest rod (4) and a locking piece (62) which is arranged on the seat frame (31) and can allow the locking piece (61) to be inserted or separated, a pressing slide block (63) which can be pressed by the backrest rod fixing seat (322) in the rotating process of the backrest rod fixing seat (322) and longitudinally move relative to the seat rod fixing seat (312) is further arranged in the seat rod fixing seat (312), a transverse pressing piece (64) which can transversely slide relative to the seat rod fixing seat (312) and eject the locking piece (61) from the locking piece (62) when being pressed by the pressing slide block (63) is further arranged in the seat rod fixing seat rod (312), and a transverse pressing piece (64) which can enable the locking piece (61) to keep the locking piece (61) in a clamping state is further arranged between the armrest rod (4) And a second elastic element (66) which can press the pressing slide block (63) to reset is also arranged between the pressing slide block (63) and the seat rod fixing seat (312).

10. The stroller of claim 6, wherein: the first locking device (5) comprises a plurality of fixing positions (51) arranged on the connecting seat (311) and a fixing clamping part (52) which is arranged on the jacking sliding block (63) and can be clamped with the fixing positions (51) to prevent the seat rod fixing seat (312) from rotating relative to the connecting seat (311) when the first locking device (5) is not unlocked.