CN118046950A

CN118046950A - Baby carriage frame

Info

Publication number: CN118046950A
Application number: CN202211398603.2A
Authority: CN
Inventors: 刘萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2024-05-17

Abstract

The invention discloses a child stroller frame which can move from an unfolding position to a folding position after a locking device is unlocked, and comprises front legs and rear legs which are rotatably connected to the front legs around a first axis A relative to the front legs, wherein the front legs are connected with front wheels, the rear legs are connected with rear wheels, the upper ends of the front legs are rotatably connected with connecting rods around a second axis B, supporting components capable of rotating relative to the connecting rods and the rear legs are arranged between the connecting rods and the rear legs, the front ends of the supporting components are rotatably connected to the upper ends of the rear legs around a third axis C, the rear ends of the supporting components are rotatably connected to the upper ends of the connecting rods around a fourth axis D, the front legs and the rear legs are arranged in a crossing mode, and push rod components are further connected to the supporting components. The invention aims to overcome the defects of the prior art and provide the child cart frame which is simple in folding structure and convenient to fold.

Description

Baby carriage frame

[ Field of technology ]

The invention relates to a stroller frame.

[ Background Art ]

With the development of society, the baby carriage has become a necessary tool for infants to travel. Parents pay more attention to the characteristics of easy folding, small size, convenient storage and the like of the child cart besides pursuing the basic requirements of safety and stability of the child cart. In view of this, at present, the child cart generally has a foldable function, and when in use, the cart is unfolded, and when not in use, the cart is folded, so that the child cart is convenient to carry, and the occupied space is reduced. The invention further provides a novel embodiment.

[ Invention ]

The invention aims to overcome the defects of the prior art and provide the child cart frame which is simple in folding structure and convenient to fold.

The invention is realized by the following technical scheme:

The utility model provides a children's shallow frame can follow the expansion position and remove to folding position after unblock locking means, including preceding leg 11 and relative its back leg 12 of rotating and connecting on preceding leg 11 around first axis A, preceding leg 11 on be connected with front wheel 111, back leg 12 on be connected with rear wheel 121, preceding leg 11 upper end rotate around second axis B and be connected with connecting rod 13, connecting rod 13 and back leg 12 between be equipped with relative two pivoted supporting component 2, supporting component 2 front end rotate around third axis C and connect in back leg 12 upper end, supporting component 2 rear end rotate around fourth axis D and connect in connecting rod 13 upper end, preceding leg 11 and back leg 12 cross arrangement, supporting component 2 on still be connected with push rod assembly 3.

The locking device comprises a first locking structure 14 which is arranged between a front leg 11 and a rear leg 12 and can lock the front leg 11 and the rear leg 12 in an unfolding state, an unlocking piece 15 which can rotate relative to the upper end of the supporting component 2 and the upper end of the rear leg 12 to unlock the first locking structure 14 is also connected between the unlocking piece 15 and the supporting component 2, a second locking structure 16 which can lock the two is also arranged between the unlocking piece 15 and the supporting component 2, and when the second locking structure 16 is unlocked, the unlocking piece 15 can rotate relative to the supporting component 2 to unlock the first locking structure 14.

The support assembly 2 comprises a support seat 21 connected between the connecting rod 13 and the rear leg 12, the support seat 21 is connected with a seat connecting seat 22 capable of rotating in the horizontal plane direction relative to the support seat, the seat connecting seat 22 is provided with a seat assembly 4 capable of being taken, the push rod assembly 3 is rotatably connected to the seat connecting seat 22 and can drive the seat connecting seat 22 to rotate in the horizontal plane direction so as to realize front-back reversing of the seat assembly 4, the push rod assembly 3 is rotatably connected with two sides of the seat connecting seat 22, the position where the push rod assembly 3 can stay comprises a pushing position capable of pushing a cart and a vertical position for driving the seat connecting seat 22 to rotate in the horizontal plane direction, a locking assembly 7 capable of enabling the push rod assembly 3 to be kept in the pushing position when being locked is arranged between the push rod assembly 3 and the seat connecting seat 22, the seat connecting seat 22 and the support seat 21, and a control assembly 5 capable of enabling the seat connecting seat 22 and the support seat 21 when the push rod assembly 3 rotates to the vertical position is also arranged between the push rod assembly 3 and the seat connecting seat 22 and the support seat 21.

The lower end of the push rod assembly 3 is provided with a transverse shaft 31 which transversely penetrates through the seat connecting seat 22 and can rotate along with the seat connecting seat, the control assembly 5 comprises a gear 51 arranged on the transverse shaft 31, and the support seat 21 is connected with a rack 52 which is meshed with the gear 51 and can slide relative to the support seat 21 when the push rod assembly 3 rotates to be locked or unlocked by being clamped with the support seat 21.

The positions where the seat connecting seat 22 and the seat assembly 4 stay include a forward position facing the front and a backward position facing the rear after rotating in the horizontal plane direction, a third locking structure 53 capable of locking the seat connecting seat 22 and the seat assembly 4 in the forward position and a fourth locking structure 54 capable of locking the seat connecting seat 22 and the seat assembly 4 in the backward position are arranged between the rack 52 and the supporting seat 21, and a stop assembly 55 capable of preventing the push rod assembly 3 from rotating forward in the vertical position is further arranged between the rack 52 and the supporting seat 21.

The seat connecting seat 22 comprises a seat body 221 and a turntable 222 connected with the seat body 221 and capable of rotating together, and the supporting seat 21 is arranged between the seat body 221 and the turntable 222.

The rack 52 includes a rack body 521, the rack body 521 is provided with a plurality of teeth 522 capable of meshing with the gear 51, the front and rear ends of the rack body 521 are provided with a first bump 523 and a second bump 524 extending downward, the support 21 is provided with a first sliding slot 211 capable of sliding the first bump 523 in the circumferential direction, and the turntable 222 is further provided with a second sliding slot 2221 for sliding the second bump 524 in the front and rear directions.

The third locking structure 53 includes a first locking protrusion 531 disposed on the front side of the supporting seat 21, and the first protrusion 523 is provided with a first locking groove 532 that can allow the first locking protrusion 531 to lock into and prevent the seat connecting seat 22 from rotating in the horizontal plane direction when the seat connecting seat 22 and the seat assembly 4 are in the forward direction;

The second protrusion 524 has a height greater than that of the first protrusion 523, and the fourth locking structure 54 includes a second locking protrusion 541 disposed at the rear side of the support seat 21 and capable of being locked and fixed with the first locking groove 532 when the seat connecting seat 22 and the seat assembly 4 are in the opposite direction, and a recess 542 disposed on the first sliding groove 211 and located at one side of the first locking protrusion 531 and capable of giving way to the second protrusion 524 when the rack 52 slides.

The groove 542 is provided with a third clamping protrusion 543, the second protrusion 524 is provided with a second clamping groove 544 into which the third clamping protrusion 543 can be clamped, and when the seat connecting seat 22 is locked in the opposite direction, the first clamping groove 532 and the second clamping protrusion 541 are clamped and fixed, and the third clamping protrusion 543 and the second clamping groove 544 are clamped and fixed.

The stop assembly 55 includes a first abutment surface 551 disposed on the support 21 and capable of abutting against an outer wall of the second protrusion 524 when the seat 22 is in the forward position with respect to the seat assembly 4 and the push rod assembly 3 is in the vertical position, and the stop assembly 55 further includes a second abutment surface 552 disposed on the support 21 and capable of abutting against an outer wall of the first protrusion 523 when the seat 22 is in the reverse position with respect to the seat assembly 4 and the push rod assembly 3 is in the vertical position.

The seat assembly 4 comprises a seat part 41 connected to the support assembly 2, the seat part 41 is connected with a backrest part 42 capable of rotating relative to the seat part 41, the backrest part 42 is connected with a handrail assembly 43 capable of rotating relative to the backrest part 42, an adjusting structure 44 capable of enabling the backrest part 42 to rotate relative to the seat part 41 after unlocking and adjusting the gear of the backrest part 42 and the seat part 41 is arranged between the seat part 41, the backrest part 42 and the handrail assembly 43, a third locking assembly 45 capable of unlocking the handrail assembly 43 and the seat part 41 when the backrest part 42 rotates and folds relative to the seat part 41 is further arranged between the seat part 41, the third locking assembly 45 comprises a locking position 451 arranged on the seat part 41, a sliding block 452 capable of sliding up and down relative to the backrest part 41 is arranged between the handrail assembly 43, the sliding block 452 is sequentially provided with a part 453 capable of extending into the backrest part 42 and the seat part 41 and being clamped into the locking position 451, the backrest part 42 is provided with a third locking assembly 45 capable of sliding up and down when the backrest part 423 rotates relative to the backrest part 42 and the backrest part 45 is further provided with a fifth locking assembly 453 capable of sliding up and down when the backrest part is folded relative to the backrest part 43, and the fifth locking assembly is further provided with a sliding part 455 capable of sliding up and the backrest part 45 is further arranged on the backrest part 452.

Compared with the prior art, the invention has the following advantages: when the baby stroller frame needs to be folded, the locking structure is unlocked, the push rod assembly rotates backwards, then the upper end of the rear leg is lifted upwards, the front leg rotates around the first axis A under the left and right of gravity, the connecting rod is driven to rotate relative to the front leg at the second axis B, the connecting position of the connecting rod and the front leg moves to the position close to the front end of the supporting assembly, the connecting rod and the supporting assembly rotate around the fourth axis, the front end of the supporting assembly rotates relative to the rear leg around the third axis C, the supporting assembly and the push rod assembly are close to the rear leg, folding operation is convenient, and the folding process is smooth.

[ Description of the drawings ]

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

FIG. 2 is a view of the child stroller frame of the present invention with the seat attachment and seat assembly in the forward position and the push rod assembly in the push position;

FIG. 3 is a view of the child stroller frame of the present invention with the seat attachment base and seat assembly in a forward position and the push rod assembly in a vertical position;

FIG. 4 is a view of the child stroller frame of the present invention with the seat attachment base and seat assembly in the inverted position and the push rod assembly in the upright position;

FIG. 5 is a view of the child stroller frame of the present invention with the seat attachment and seat assembly in the inverted position and the push rod assembly in the push position;

FIG. 6 is a state diagram of the child stroller frame of the present invention folded;

FIG. 7 is a perspective view of the front leg, rear leg and support assembly of the child stroller frame of the present invention;

FIG. 8 is a side view of the front leg, rear leg and support assembly of the child stroller frame of the present invention;

FIG. 9 is a view of the front leg, rear leg and support assembly of the child stroller frame of the present invention in a collapsed condition;

FIG. 10 is a view of the front leg, rear leg and support assembly of the child stroller frame of the present invention shown in a fully folded condition;

FIG. 11 is a perspective view of a seat attachment and push rod assembly in a stroller frame according to the present invention;

FIG. 12 is an exploded view of the support base, seat attachment base and push rod assembly of the stroller frame of the present invention;

FIG. 13 is an exploded view of the seat attachment and push rod assembly of the stroller frame of the present invention;

FIG. 14 is a perspective view of the support assembly and push rod assembly of the child stroller frame of the present invention from a bottom view;

FIG. 15 is an exploded view of the support assembly in the stroller frame of the present invention;

FIG. 16 is a perspective view of a turntable in the stroller frame of the present invention;

FIG. 17 is a perspective view of the third closure in the child stroller frame of the present invention in a locked condition;

FIG. 18 is a perspective view of the third lock in the child stroller frame of the present invention in an unlocked state;

FIG. 19 is a cross-sectional view of the third lock in the child stroller frame of the present invention in an unlocked state;

FIG. 20 is a perspective view of a fourth closure in the stroller frame of the present invention;

FIG. 21 is a cross-sectional view of a fourth closure in the stroller frame of the present invention;

FIG. 22 is a cross-sectional view of the fourth lock in the child stroller frame of the present invention shown locked;

FIG. 23 is an exploded view of a first closure in the stroller frame of the present invention;

FIG. 24 is an exploded view of the first and second locking arrangements of the stroller frame of the present invention;

FIG. 25 is one of the perspective views of the locking structure in the stroller frame of the present invention;

FIG. 26 is a second perspective view of the locking structure of the stroller frame of the present invention;

FIG. 27 is a cross-sectional view of the locking structure in the stroller frame of the present invention;

FIG. 28 is a perspective view of a seat assembly in a stroller frame of the present invention;

FIG. 29 is one of the exploded views of the seat assembly in the child stroller frame of the present invention;

FIG. 30 is a second exploded view of the seat assembly in the child stroller frame of the present invention;

FIG. 31 is a third exploded view of the seat assembly in the stroller frame of the present invention.

[ Detailed description ] of the invention

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

As shown in fig. 1 to 31, a stroller frame can move from an unfolded position to a folded position after unlocking a locking device, and comprises a front leg 11 and a rear leg 12 rotatably connected to the front leg 11 around a first axis a relative to the front leg 11, wherein the front leg 11 is connected with a front wheel 111, the rear leg 12 is connected with a rear wheel 121, the upper end of the front leg 11 is rotatably connected with a connecting rod 13 around a second axis B, a supporting component 2 capable of rotating relative to the connecting rod 13 and the rear leg 12 is arranged between the connecting rod 13 and the rear leg 12, the front end of the supporting component 2 is rotatably connected to the upper end of the rear leg 12 around a third axis C, the rear end of the supporting component 2 is rotatably connected to the upper end of the connecting rod 13 around a fourth axis D, the front leg 11 and the rear leg 12 are arranged in a crossing manner, and the supporting component 2 is also connected with a push rod component 3.

When the baby stroller frame needs to be folded, firstly, the locking structure is unlocked, the push rod assembly 3 rotates backwards, then the upper end of the rear leg 12 is lifted upwards, the front leg 11 rotates around the first axis A under the action of gravity, the connecting rod 13 is driven to rotate relative to the front leg 11 at the second axis B, the connecting position of the connecting rod 13 and the front leg 11 moves to the position close to the front end of the supporting assembly 2, the connecting rod 13 rotates around the fourth axis D at the connecting position of the connecting rod 13 and the supporting assembly 2, the front end of the supporting assembly 2 rotates relative to the rear leg 12 around the third axis C, the supporting assembly 2 and the push rod assembly 3 are close to the rear leg 12, the folding operation is convenient, and the folding process is smooth. The support component 2, the rear leg 12 and the connecting rod 13 are arranged in a triangle shape when being unfolded, so that the support is more stable and safer.

As shown in fig. 1 and 7, the locking device includes a first locking structure 14 disposed between the front leg 11 and the rear leg 12 and capable of locking the front leg 11 and the rear leg 12 in an unfolded state, an unlocking member 15 capable of rotating relative to the upper ends of the support assembly 2 and the rear leg 12 to unlock the first locking structure 14 is further connected between the unlocking member 15 and the support assembly 2, a second locking structure 16 capable of locking the two is further disposed between the unlocking member 15 and the support assembly 2, and when the second locking structure 16 is unlocked, the unlocking member 15 can rotate relative to the support assembly 2 to unlock the first locking structure 14. When the stroller frame needs to be folded, the push rod assembly 3 is rotated backwards to a proper position, then the second locking structure 16 is unlocked, at the moment, the locking between the supporting assembly 2 and the unlocking piece 15 is released, then the unlocking piece 15 is lifted, the unlocking piece 15 rotates relative to the supporting assembly 2 to unlock the first locking structure 14, at the moment, the upper end of the rear leg 12 is lifted, the front leg 11 rotates around the first axis A under the action of gravity, the connecting rod 13 is driven to rotate relative to the front leg 11 at the second axis B, the connecting position of the connecting rod 13 and the front leg 11 is moved to a position close to the front end of the supporting assembly 2, the connecting rod 13 and the supporting assembly 2 rotate around the fourth axis D, the front end of the supporting assembly 2 rotates relative to the rear leg 12 around the third axis C, and the supporting assembly 2 and the push rod assembly 3 are close to the rear leg 12, and the folding operation is convenient. The second locking structure 16 is used as a two-way lock to lock, so that the first locking structure 14 is prevented from being unlocked due to misoperation of the unlocking piece 15

As shown in fig. 2 to 13, the supporting component 2 includes a supporting seat 21 connected between the connecting rod 13 and the rear leg 12, the supporting seat 21 is connected with a seat connecting seat 22 capable of rotating in the horizontal plane direction relative to the supporting seat, the seat connecting seat 22 is provided with a seat component 4 capable of being taken, the push rod component 3 is rotatably connected to the seat connecting seat 22 and can drive the seat connecting seat 22 to rotate in the horizontal plane direction so as to realize front-back reversing of the seat component 4, the push rod component 3 is rotatably connected with both sides of the seat connecting seat 22 so that the position where the push rod component 3 can stay includes a pushing position capable of pushing a cart and a vertical position for driving the seat connecting seat 22 to rotate in the horizontal plane direction, a locking component 7 capable of enabling the push rod component 3 to be kept in the pushing position is arranged between the push rod component 3 and the seat connecting seat 22, and a control component 5 capable of locking the seat connecting seat 22 and the supporting seat 21 and enabling the seat 22 to be unlocked when the push rod component 3 rotates to the vertical position is arranged among the push rod component 3, the seat connecting seat 22 and the supporting seat 21. After unlocking the locking assembly 7, the push rod assembly 3 can be mutually switched between the pushing position and the vertical position. The position where the push rod assembly 3 stays on the frame of the baby stroller comprises a pushing position and a vertical position, when the push rod assembly 3 stays in the pushing position, a adult can push the frame of the baby stroller to walk forwards through the push rod assembly 3, when the push rod assembly 3 rotates forwards from the pushing position to the vertical position, the control assembly 5 enables the seat connecting seat 22 to be unlocked from the supporting seat 21, the adult can hold the push rod assembly 3 in the vertical position to drive the seat connecting seat 22 to rotate in the horizontal plane direction, when the seat connecting seat 22 rotates 180 degrees, the seat assembly 4 finishes front-back reversing, and at the moment, the seat assembly 4 faces the adult. Therefore, when the seat assembly 4 is operated by a person for reversing, the push rod assembly 3 only needs to be rotated forwards in the vertical plane direction, so that the push rod assembly 3 is moved from the pushing position to the vertical position and then the push rod assembly 3 is rotated in the horizontal plane direction, and the operation is very convenient and quick.

As shown in fig. 14 to 22, the lower end of the push rod assembly 3 is provided with a transverse shaft 31 which transversely penetrates through the seat connecting seat 22 and can rotate along with the seat connecting seat, the control assembly 5 comprises a gear 51 arranged on the transverse shaft 31, and the support seat 21 is connected with a rack 52 which is meshed with the gear 51 and can slide relative to the support seat 21 when the push rod assembly 3 rotates to be locked or unlocked by being locked with the support seat 21. When the push rod assembly 3 is rotated forward to move from the pushing position to the vertical position, the gear 51 on the transverse shaft 31 is meshed with the rack 52 to drive the rack 52 to slide relative to the support seat 21 to be in a state of being separated from the support seat 21, and at the moment, the seat connecting seat 22 can rotate relative to the support seat 21. When the push rod assembly 3 is rotated back to the pushing position, the rack 52 is locked with the supporting seat 21 again, and the seat connecting seat 22 is prevented from rotating in the horizontal plane direction.

As shown in fig. 14 to 22, the positions where the seat connecting seat 22 and the seat assembly 4 stay include a forward position facing forward and a backward position facing backward after rotating in a horizontal plane direction, a third locking structure 53 capable of locking the seat connecting seat 22 and the seat assembly 4 in the forward position and a fourth locking structure 54 capable of locking the seat connecting seat 22 and the seat assembly 4 in the backward position are arranged between the rack 52 and the support seat 21, and a stop assembly 55 capable of preventing the push rod assembly 3 from rotating forward in the vertical position is further arranged between the rack 52 and the support seat 21. More importantly, the stop component 55 can prevent the push rod component 3 from continuing to rotate forwards when being in the vertical position, so that misoperation of forward rotation of the push rod component 3 caused by unbalanced force application when the torque force in the horizontal plane direction is applied to the push rod component 3 in the vertical position is avoided, safety is ensured, and after reversing of the seat component 4 is completed, the stop component 55 also ensures that the push rod component 3 can only rotate backwards to return to the pushing position, so that the reliability of use of the cart is ensured.

As shown in fig. 14 to 22, the seat connecting base 22 includes a base 221 and a turntable 222 connected to the base 221 and rotatable together, and the support base 21 is disposed between the base 221 and the turntable 222. The turntable 222 is connected to the base 221 by a connection member such as a screw, and when the base 221 is pushed to rotate relative to the support base 21, the turntable 222 rotates together.

As shown in fig. 14 to 22, the rack 52 includes a rack body 521, a plurality of teeth 522 capable of meshing with the gear 51 are provided on the rack body 521, a first protrusion 523 and a second protrusion 524 extending downward are provided at front and rear ends of the rack body 521, a first sliding slot 211 capable of sliding the first protrusion 523 in the circumferential direction is provided on the support 21, and a second sliding slot 2221 for sliding the second protrusion 524 in the front and rear directions is provided on the turntable 222. The gear 51 is engaged with the tooth 522, the first sliding slot 211 is provided with a first bump 523 for sliding therein, the second sliding slot 2221 is provided with a second bump 524 for sliding therein, and when the first bump 523 slides in the circumferential direction in the first sliding slot 211, the second bump 524 is located in the second sliding slot 2221 and rotates in the horizontal plane direction together with the turntable 222.

As shown in fig. 14 to 22, the third locking structure 53 includes a first locking protrusion 531 disposed on the front side of the supporting seat 21, and the first protrusion 523 is provided with a first locking groove 532 capable of locking the first locking protrusion 523 when the seat connecting seat 22 and the seat assembly 4 are in the forward direction to prevent the seat connecting seat 22 from rotating in the horizontal direction; the second protrusion 524 has a height greater than that of the first protrusion 523, the fourth locking structure 54 includes a second locking protrusion 541 disposed on the rear side of the support seat 21, and a recess 542 disposed on the first sliding slot 211 and located on one side of the first locking protrusion 523 and capable of giving way to the second protrusion 524 when the rack 52 slides. The height of the second bump 524 is greater than that of the first bump 523, so that the recess 542 and the first chute 211 form a step disposed up and down. When the seat connecting seat 22 and the seat assembly 4 are in the forward direction and the push rod assembly 3 is in the pushing position, the rack 52 is blocked from rotating in the horizontal plane direction by mutually clamping and locking the first clamping protrusion 531 with the first clamping groove 532, and the second protrusion 524 is located in the second sliding groove 2221; when the seat connecting base 22 and the seat assembly 4 are in the forward direction and the push rod assembly 3 is in the vertical direction, the rack 52 slides to separate the first clamping groove 532 on the first protruding block 523 from the first clamping protrusion 531, the first protruding block 523 enters the first sliding groove 211, and at this time, the second protruding block 524 is still located in the second sliding groove 2221, so that the seat connecting base 22 can be rotated and reversed relative to the supporting base 21.

When the push rod assembly 3 is in the vertical position and the seat connecting seat 22 and the seat assembly 4 are rotated and reversed from the forward position to the reverse position, the rack 52 rotates 180 ° in a following manner, the first clamping groove 532 on the first protruding block 523 corresponds to the second clamping protrusion 541, the second protruding block 524 corresponds to the groove 542, and when the seat connecting seat 22 and the seat assembly 4 are in the reverse position and the push rod assembly 3 is rotated from the vertical position to the pushing position, the rack 52 is driven by the gear 51 to slide relative to the supporting seat 21, the second protruding block 524 slides forward into the groove 542, the first clamping groove 532 is clamped with the second clamping protrusion 541, and the seat connecting seat 22 cannot rotate relative to the supporting seat 21. The groove 542 not only serves to give way to the second projection 524, but also the groove wall of the groove 542 can abut against the second projection 524 to prevent the seat connecting seat 22 from rotating in the horizontal direction.

As shown in fig. 14 to 22, the groove 542 is provided with a third clamping protrusion 543, the second protrusion 524 is provided with a second clamping groove 544 into which the third clamping protrusion 543 can be clamped, and when the seat connecting seat 22 is locked in the opposite direction, the first clamping groove 532 is clamped and fixed with the second clamping protrusion 541, and the third clamping protrusion 543 is clamped and fixed with the second clamping groove 544. And when the seat connecting seat 22 and the seat assembly 4 are in the opposite direction and the push rod assembly 3 rotates from the vertical position to the pushing position, the rack 52 is driven by the gear 51 to slide relative to the supporting seat 21, and at this time, the second projection 524 slides forward into the groove 542, so that the second clamping groove 544 is clamped and fixed with the third clamping protrusion 543, and meanwhile, the first clamping groove 532 is clamped and fixed with the second clamping protrusion 541, so that the connection between the seat connecting seat 22 and the supporting seat 21 is more stable.

As shown in fig. 14 to 22, the stop assembly 55 includes a first abutment surface 551 provided on the support base 21 and capable of abutting against the outer wall of the second protrusion 524 when the seat 22 is in the forward position with respect to the seat assembly 4 and the push rod assembly 3 is in the vertical position, and the stop assembly 55 further includes a second abutment surface 552 provided on the support base 21 and capable of abutting against the outer wall of the first protrusion 523 when the seat 22 is in the reverse position with respect to the seat assembly 4 and the push rod assembly 3 is in the vertical position. The first abutting surface 551 and the second bump 524 abut against each other when the seat connecting seat 22 and the seat assembly 4 are in the forward position and the push rod assembly 3 is in the vertical position, and at this time, the first abutting surface 551 can prevent the rack 52 from moving continuously, thereby preventing the push rod assembly 3 from rotating continuously forward in the vertical position, which is safer. The second abutting surface 552 abuts against the first bump 523 when the seat connecting seat 22 and the seat assembly 4 are in the opposite direction and the push rod assembly 3 is in the vertical position, and at this time, the second abutting surface 552 can prevent the rack 52 from moving further, thereby preventing the push rod assembly 3 from rotating forward in the vertical position, which is safer.

As shown in fig. 12 to 13, the locking assembly 7 includes a left housing 71 provided on the seat connecting seat 22 and a right housing 72 provided on the push rod assembly 3, a receiving cavity 73 is defined between the left housing 71 and the right housing 72, spline grooves 74 are provided in the left housing 71 and the right housing 72, splines 75 capable of sliding up and down relative to the left housing 71 and the right housing 72 and simultaneously engaging with the spline grooves 74 in the left housing 71 and the right housing 72 are provided in the receiving cavity 73, a sliding unlocking member 76 is provided on the push rod assembly 3, a first pull cable 77 capable of disengaging the splines 75 from the left housing 71 when the sliding unlocking member 76 slides is provided between the sliding unlocking member 76 and the splines 75, and a first elastic member 78 capable of resetting the splines 75 is connected between the splines 75 and the right housing 72. When the push rod assembly 3 needs to be rotated, the sliding unlocking component 76 is shifted upwards, at this time, the sliding unlocking component 76 drives the first pull rope 77 to move upwards, the first pull rope 77 pulls the spline 75 to slide transversely, the first elastic piece 78 is compressed when the spline 75 slides transversely, meanwhile, the spline 75 is separated from the spline groove 74 on the left shell 71 and enters the right shell 72 completely, at this time, the push rod assembly 3 can rotate relative to the seat connecting seat 22, and the push rod assembly 3 can be folded or rotated to the vertical position by the pushing position.

As shown in fig. 23 to 24, the first locking structure 14 includes a first locking portion 141 disposed on the front leg 11, a latch member 142 capable of sliding relative to the rear leg 12 to be locked in or separated from the first locking portion 141 is connected to the rear leg 12, a protruding portion 151 protruding outwards is disposed on the unlocking member 15, a second cable 143 capable of connecting the protruding portion 151 and the latch member 142 and driving the latch member 142 to separate from the first locking portion 141 when the unlocking member 15 moves is disposed between the protruding portion 151 and the latch member 142, and a second elastic member 144 capable of pushing against the latch member 142 to enable the latch member 142 to be locked in the first locking portion 141 is disposed on the rear leg 12. When the second locking structure 16 is unlocked, the unlocking member 15 is pulled upwards to rotate relative to the rear leg 12 and the supporting seat 21, the protruding portion 151 on the unlocking member 15 rotates to drive the second pull rope 143 to move, the second pull rope 143 pulls the locking member 142 to move upwards, the locking member 142 gradually breaks away from the first locking position 141, the second elastic member 144 is in a compressed state, and at this time, the front leg 11 can rotate relative to the rear leg 12.

As shown in fig. 23 to 24, the second locking structure 16 includes a second locking portion 161 disposed on the unlocking member 15, the supporting seat 21 is provided with a locking pin 162 capable of sliding relative to the second locking portion 161 to be locked or unlocked, the locking pin 162 is provided with an operation portion 1621 protruding outwards and capable of making the locking pin 162 separate from the second locking portion 161 when operated, and a third elastic member 163 capable of making the locking pin 162 maintain a locked state is disposed between the locking pin 162 and the supporting seat 21. When the operation part 1621 is shifted transversely, the operation part 1621 drives the whole bayonet lock 162 to slide transversely relative to the supporting seat 21, the bayonet lock 162 is gradually separated from the second locking position 161, the third elastic member 163 is compressed, and the unlocking member 15 can rotate upwards relative to the supporting assembly 2 to unlock the first locking structure 14.

As shown in fig. 28, the seat assembly 4 includes a seat portion 41 connected to the support assembly 2, a backrest portion 42 capable of rotating relative to the seat portion 41 is connected to the seat portion 41, a handrail assembly 43 capable of rotating relative to the backrest portion 42 is connected to the backrest portion 42, an adjusting structure 44 capable of rotating the backrest portion 42 relative to the seat portion 41 after unlocking is provided between the seat portion 41 and the backrest portion 42 to adjust the gear of the angle between the backrest portion 42 and the seat portion 41, and a third locking assembly 45 capable of unlocking the handrail assembly 43 and the seat portion 41 and capable of unlocking when the backrest portion 42 is folded rotationally relative to the seat portion 41 is provided between the seat portion 41, the backrest portion 42 and the handrail assembly 43. When the seat assembly 4 is folded, the adjustment structure 44 needs to be unlocked, and then the backrest portion 42 is rotated so that the backrest portion 42 drives the third locking assembly 45 to unlock and thus fold.

As shown in fig. 29 to 31, the adjusting structure 44 includes a plurality of adjusting positions 441 circumferentially spaced on the seat portion 41, the backrest portion 42 is provided with a locking member 442 capable of sliding relative to the backrest portion to be locked into or separated from the adjusting positions 441, the backrest portion 42 is further provided with an operating member 443, a third cable 444 capable of pulling the locking member 142 out of the adjusting positions 441 when the operating member 443 is operated is provided between the operating member 443 and the locking member 142, a fourth elastic member 445 capable of keeping the locking member 142 in a locked state is provided between the locking member 142 and the backrest portion 42, the backrest portion 42 is provided with a positioning protrusion 421, and the seat portion 41 is provided with a positioning groove 411 for the positioning protrusion 421 to move inside. The positioning boss 421 and the positioning slot 411 cooperate to define the range of forward and backward rotation of the backrest portion 42. When the included angle gear between the seat portion 41 and the backrest portion needs to be adjusted, the operating member 443 is operated to pull the third cable 444, the third cable 444 drives the clamping member 442 to disengage from the adjusting position 441, at this time, the backrest portion 42 can rotate relative to the seat portion 41 to adjust the included angle gear, and when the backrest portion 42 is adjusted in place, the operating member 443 is released, and the fourth elastic member 445 pushes the clamping member 442 to reset, so that the clamping member 442 is clamped into the adjusting position 441 again.

As shown in fig. 29 to 31, the third locking assembly 45 includes a locking position 451 provided on the seat portion 41, a slider 452 capable of sliding up and down relative to the two is provided between the armrest assembly 43, the slider 452 is provided with a locking portion 453 capable of sequentially extending into the backrest portion 42 and the seat portion 41 and being locked in the locking position 451, the backrest portion 42 is provided with an arc-shaped protrusion 454 capable of pushing the locking portion 453 to slide up when the backrest portion 42 is folded in a rotating manner, and a fifth elastic member 455 capable of enabling the locking portion 453 to maintain a locked state is provided between the slider 452 and the armrest assembly 43. When the seat assembly 4 needs to be folded, the adjusting structure 44 is first unlocked, then the backrest 42 is pushed to rotate towards the seat 41, and the arc-shaped protrusion 454 on the backrest 42 gradually pushes the locking portion 453 to move upwards in the process of rotating towards the backrest 42, so that the locking portion 453 is separated from the locking position 451 on the seat 41, at this time, the third locking assembly 45 is unlocked, and the whole armrest assembly 43 can rotate relative to the seat 41 to be folded.

As shown in fig. 29 to 31, the backrest portion 42 is provided with a first supporting surface 423 capable of supporting against the slider 452 to drive the armrest assembly 43 to rotate and unfold upwards when the backrest portion is unfolded, and the backrest portion 42 is further provided with a second supporting surface 424 capable of supporting against the slider 452 to drive the armrest assembly 43 to rotate and fold downwards when the backrest portion is folded. When the backrest part 42 rotates forwards to fold, the second propping surface 424 gradually props against the locking part 453 on the sliding block 452, so that the armrest assembly 43 is driven by the backrest part 42 to fold, and when the backrest part 42 rotates backwards to unfold, the first propping surface 423 gradually props against the locking part 453 on the sliding block 452, so that the armrest assembly 43 is driven by the backrest part 42 to unfold, and the folding and unfolding operation of the seat assembly 4 is very convenient only by pulling the backrest part 42.

As shown in fig. 11, 25-27, the seat portion 41 is detachably connected to the support assembly 2, a plurality of positioning portions 412 protruding downward are provided on the seat portion 41, a plurality of positioning grooves 221 capable of positioning and accommodating the positioning portions 412 are provided on the seat connecting seat 22, a locking structure 6 capable of locking the seat portion 41 and the seat connecting seat 22 is provided between the seat portion 41 and the seat connecting seat 22, the locking structure 6 comprises a plurality of sliding grooves 61 provided on the seat portion 41, a first sliding member 62 capable of sliding up and down relative to the sliding grooves 61 is provided in each sliding groove 61, a locking opening 63 is provided on the first sliding member 62, a first spring 64 pushing the first sliding member 62 to reset is provided between the first sliding member 62 and the seat portion 41, a plurality of second sliding members 65 capable of sliding transversely relative to the first sliding member 62 are provided on the support assembly 2, a locking tongue 651 capable of being locked into the locking opening 63 is provided on the second sliding member 65, the second sliding piece 65 and the seat connecting seat 22 are provided with a second spring 66 which can keep the locking state of the locking tongue 651, the supporting component 2 is also provided with two sliding unlocking strips 67 which can slide back and forth relative to the sliding unlocking strips, the sliding unlocking strips 67 are provided with bolts 68 which can be respectively locked into the two second sliding pieces 65 at intervals, the front and back ends of the sliding unlocking strips 67 are provided with a front operation part 671 and a back operation part 672 which are protruded out of the seat connecting seat 22, the sliding unlocking strips 67 are also provided with V-shaped grooves 673 which can enable the bolts 68 to move inside after the front operation part 671 and the back operation part 672 are pressed, the V-shaped grooves 673 are provided with first pushing surfaces 6731 which can push the bolts 68 when the front operation part 671 is operated so as to enable the locking tongue 651 on the second sliding piece 65 to be separated from the locking opening 63, the V-shaped groove 673 is further provided with a second pressing surface 6732 capable of pushing the latch 68 when the rear operating portion 672 is operated, so that the latch 651 on the second slider 65 is separated from the locking opening 63. When the seat assembly 4 is detachably connected to the seat connecting seat 22 through the seat portion 41 thereon, the positioning portion 412 on the seat portion 41 is aligned with the positioning groove 221 on the seat connecting seat 22, and then the seat portion 41 is pressed downward, at this time, the positioning portion 412 pushes the locking tab 651 on the second sliding member 65 to retract the locking tab 651 into the seat connecting seat 22, the second spring 66 is compressed by being pressed upward, the seat portion 41 slides downward until the locking tab 651 is aligned with the locking opening 63, the second spring 66 pushes the second sliding member 65 to slide reversely, at this time, the locking tab 651 gradually pushes into the locking opening 63, and the first spring 64 is compressed when the first sliding member 62 moves downward. When the seat part 41 and the seat connecting seat 22 need to be unlocked to separate the seat assembly 4 from the supporting assembly 2, the front operation part 671 or the rear operation part 672 is operated, at this time, the sliding unlocking strip 67 slides forwards or backwards, the first pressing surface 6731 or the second pressing surface 6732 of the V-shaped groove 673 on the sliding unlocking strip 67 pushes the latch 68 to slide transversely, the latch 68 drives the second sliding member 65 to slide transversely relative to the seat connecting seat 22 during sliding, so that the latch 651 gradually separates from the locking opening 63, after the latch 651 separates from the locking opening 63, the first spring 64 resets, the seat assembly moves upwards, at this time, the locking opening 63 also becomes smaller, even if the latch 651 is reset transversely, the latch 651 cannot be blocked into the locking opening 63, so that a user can conveniently release the front operation part and the rear operation part to vacate hands to take the seat assembly, and the operation is convenient. The provision of the V-shaped groove 673 allows a person to unlock the locking structure 6 both on the front and rear sides of the frame, thereby facilitating unlocking of the seat assembly 4.

Claims

1. The utility model provides a children's shallow frame, can remove to the folding position from the unfolding position after unlocking locking device which characterized in that: including preceding leg (11) and relative its back leg (12) of rotating and being connected on preceding leg (11) around first axis (A), preceding leg (11) on be connected with front wheel (111), back leg (12) on be connected with rear wheel (121), preceding leg (11) upper end be connected with connecting rod (13) around second axis (B) rotation, connecting rod (13) and back leg (12) between be equipped with relative two pivoted supporting component (2), supporting component (2) front end rotate around third axis (C) and be connected in back leg (12) upper end, supporting component (2) rear end rotate around fourth axis (D) and be connected in connecting rod (13) upper end, preceding leg (11) and back leg (12) cross arrangement, supporting component (2) on still be connected with push rod assembly (3).

2. The stroller frame of claim 1, wherein: the locking device comprises a first locking structure (14) which is arranged between a front leg (11) and a rear leg (12) and can lock the front leg (11) and the rear leg (12) in an unfolding state, an unlocking piece (15) which can rotate relative to the support assembly (2) and the upper end of the rear leg (12) to unlock the first locking structure (14) is further connected between the support assembly and the upper end of the rear leg, a second locking structure (16) which can lock the support assembly (2) is further arranged between the unlocking piece (15) and the support assembly (2), and when the second locking structure (16) is unlocked, the unlocking piece (15) can rotate relative to the support assembly (2) to unlock the first locking structure (14).

3. The stroller frame of claim 1, wherein: the support assembly (2) including being connected to supporting seat (21) between connecting rod (13) and rear leg (12), supporting seat (21) on be connected with relative its seat connecting seat (22) of rotating in the horizontal plane direction, seat connecting seat (22) on be equipped with seat subassembly (4) that can take, push rod subassembly (3) swivelling joint on seat connecting seat (22) and can drive seat connecting seat (22) and rotate in the horizontal plane direction in order to realize seat subassembly (4) front and back switching-over, push rod subassembly (3) and seat connecting seat (22) both sides rotatable coupling and make push rod subassembly (3) can stop the position including the pushing position that can push away the shallow and be used for driving seat connecting seat (22) and rotate in the horizontal plane direction vertical position, push rod subassembly (3) and seat connecting seat (22) between be equipped with and can make push rod subassembly (3) keep in the locking subassembly (7) of pushing position when locking, push rod subassembly (3), seat connecting seat (22) and supporting seat (21) between can also be equipped with and support subassembly (21) and can lock and make push rod subassembly (21) and the vertical position (5) and can lock when supporting seat connecting seat (21) and the vertical position.

4. The stroller frame of claim 2, wherein: the push rod assembly (3) lower extreme be equipped with transversely wear to establish seat connecting seat (22) and can follow its pivoted horizontal axle (31), control assembly (5) including locating gear (51) on horizontal axle (31), supporting seat (21) on be connected with gear (51) meshing and can slide and lock or release rack (52) of unblock with supporting seat (21) relative supporting seat (21) when push rod assembly (3) rotate.

5. The stroller frame of claim 4, wherein: the seat connecting seat (22) and the seat component (4) stay at positions including forward positions and backward positions, wherein the forward positions face forward, the backward positions face backward after the horizontal plane direction is rotated, a third locking structure (53) capable of locking the seat connecting seat (22) and the seat component (4) in the forward positions and a fourth locking structure (54) capable of locking the seat connecting seat (22) and the seat component (4) in the backward positions are arranged between the rack (52) and the supporting seat (21), and a stop component (55) capable of preventing the push rod component (3) from rotating forward in the vertical positions is further arranged between the rack (52) and the supporting seat (21).

6. The stroller frame of claim 5, wherein: the seat connecting seat (22) comprises a seat body (221) and a rotary table (222) which is connected with the seat body (221) and can rotate together, and the supporting seat (21) is arranged between the seat body (221) and the rotary table (222).

7. The stroller frame of claim 6, wherein: the rack (52) comprises a rack body (521), a plurality of teeth (522) capable of being meshed with the gear (51) are arranged on the rack body (521), a first protruding block (523) and a second protruding block (524) which extend downwards are arranged at the front end and the rear end of the rack body (521), a first sliding groove (211) capable of enabling the first protruding block (523) to slide along the inner circumferential direction is arranged on the supporting seat (21), and a second sliding groove (2221) capable of enabling the second protruding block (524) to slide along the inner front and rear direction is further arranged on the turntable (222).

8. The stroller frame of claim 7, wherein: the third locking structure (53) comprises a first clamping protrusion (531) arranged at the front side of the supporting seat (21), and a first clamping groove (532) which can be used for clamping the first clamping protrusion (531) to prevent the seat connecting seat (22) from rotating in the horizontal plane direction when the seat connecting seat (22) and the seat assembly (4) are in the positive direction is arranged on the first protruding block (523);

The height of second lug (524) be greater than the height of first lug (523), fourth locking structure (54) including locating supporting seat (21) rear side and can be with fixed second joint protruding (541) of first draw-in groove (532) joint when seat connecting seat (22) and seat subassembly (4) are in the opposite direction, first spout (211) on and lie in first joint protruding (531) one side be equipped with undercut and can give way recess (542) for second lug (524) when rack (52) slip.

9. The stroller frame of claim 8, wherein: the groove (542) on be equipped with third joint arch (543), second lug (524) on be equipped with second draw-in groove (544) that can supply third joint arch (543) card to go into, and when seat connecting seat (22) are locked in the reverse bit first draw-in groove (532) and second joint arch (541) joint fixed just third joint arch (543) and second draw-in groove (544) joint fixed.

10. The stroller frame of claim 7, wherein: the stop component (55) comprises a first propping surface (551) which is arranged on the supporting seat (21) and can prop against the outer wall of the second lug (524) when the seat connecting seat (22) and the seat component (4) are in the positive position and the push rod component (3) is in the vertical position, and the stop component (55) also comprises a second propping surface (552) which is arranged on the supporting seat (21) and can prop against the outer wall of the first lug (523) when the seat connecting seat (22) and the seat component (4) are in the reverse position and the push rod component (3) is in the vertical position.

11. The stroller frame of claim 1, wherein: the seat assembly (4) comprises a seat part (41) connected to the support assembly (2), the seat part (41) is connected with a backrest part (42) capable of rotating relative to the seat part, the backrest part (42) is connected with a handrail assembly (43) capable of rotating relative to the backrest part, an adjusting structure (44) capable of enabling the backrest part (42) to rotate relative to the seat part (41) after unlocking is arranged between the seat part (41) and adjusting the included angle between the backrest part (42) and the seat part (41), a third locking assembly (45) capable of unlocking the handrail assembly (43) and the seat part (41) and when the backrest part (42) rotates and folds relative to the seat part (41) is arranged between the backrest part (41), a sliding block (452) capable of sliding relative to the sliding block (452) is arranged between the handrail assembly (43) and the backrest part (41), and the sliding block (452) can be connected into the backrest part (41) in sequence, the novel folding back rest is characterized in that the back rest part (42) is provided with an arc-shaped bulge (454) capable of pushing the locking part (453) to slide upwards when the back rest part is folded in a rotating mode, a fifth elastic piece (455) capable of enabling the locking part (453) to keep a locking state is arranged between the sliding block (452) and the armrest assembly (43), the back rest part (42) is provided with a first propping surface (422) capable of propping against the sliding block (452) to drive the armrest assembly (43) to rotate upwards when the back rest part is unfolded, and the back rest part (42) is also provided with a second propping surface (423) capable of propping against the sliding block (452) to drive the armrest assembly (43) to rotate downwards when the back rest part is folded.