Stroller and stroller frame

1 . A stroller frame, comprising front tubes ( 20 ) and rear tubes ( 21 ), wherein the stroller frame further comprises:

a frame ( 1 ), defining an accommodation space ( 14 ) to accommodate the front tubes ( 20 ) and the rear tubes ( 21 ), wherein the frame ( 1 ) is provided with slide rails ( 12 ) therein, and the slide rails ( 12 ) are disposed in the accommodation space ( 14 ); and

sliders ( 23 ), movably connected to the front tubes ( 20 ) and the rear tubes ( 21 ), and configured to drive the front tubes ( 20 ) and the rear tubes ( 21 ) to move into the accommodation space ( 14 ), wherein each of the slide rails ( 12 ) cooperates with a corresponding one of the sliders ( 23 ) to allow the slider ( 23 ) to slide longitudinally;

wherein the stroller frame has an unfolded state and a folded state; when the front tubes ( 20 ) and the rear tubes ( 21 ) extend out of the accommodation space ( 14 ), the stroller frame is in the unfolded state and is maintained in a stable configuration; when the front tubes ( 20 ) and the rear tubes ( 21 ) are retracted into the accommodation space ( 14 ), the stroller frame is in the folded state and is maintained in a stable configuration; and

wherein the frame ( 1 ) further comprises a locking mechanism ( 4 ) configured to lock each of the sliders ( 23 ) to the frame ( 1 ) when the stroller frame is in the folded state, the locking mechanism ( 4 ) comprises an unlocking post ( 40 ) rotatably connected to a top end of the frame ( 1 ), a reverse wedge-shaped locking tab ( 42 ) extends outward from a side of the unlocking post ( 40 ), a positive wedge-shaped locking tab ( 41 ) extends vertically outward from a surface of each of the sliders ( 23 ) facing towards an inside of the frame ( 1 ), and the positive wedge-shaped locking tab ( 41 ) is engaged with the reverse wedge-shaped locking tab ( 42 ).

2 . The stroller frame as claimed in claim 1 , wherein the stroller frame further comprises support brackets ( 22 ) configured to maintain the stable configuration of the stroller frame in the unfolded state, and each of the support brackets ( 22 ) comprises:

two support rods ( 220 ), wherein ends of the two support rods ( 220 ) are hinged to each other, and other ends of the two support rods ( 220 ) are hinged to a corresponding one of the front tubes ( 20 ) and a corresponding one of the rear tubes ( 21 ) respectively; and

two protruding abutments ( 221 ), disposed on the two support rods ( 220 ) respectively, wherein the two protruding abutments ( 221 ) are disposed at the ends where the two support rods ( 220 ) are hinged to each other; and

wherein when the two support rods ( 220 ) rotate relative to each other, the two protruding abutments ( 221 ) are located on an outer side of a rotation direction of the two support rods ( 220 ), and are configured to limit a maximum rotation angle of the two support rods ( 220 ) to no greater than a preset angle.

3 . The stroller frame as claimed in claim 1 , wherein rotating mechanisms ( 26 ) are respectively disposed at ends of the front tubes ( 20 ) and rear tubes ( 21 ) facing away from the frame ( 1 ), wheels ( 25 ) of the stroller frame are caster wheels, and the caster wheels are fixed to the rotating mechanisms ( 26 ) respectively; and the ends of the front tubes ( 20 ) and the rear tubes ( 21 ) connected to the rotating mechanisms ( 26 ) are referred to as connecting ends ( 200 ).

4 . The stroller frame as claimed in claim 3 , wherein each of the rotating mechanisms ( 26 ) comprises:

a rotating arm ( 264 ), connected between a corresponding one of the wheels ( 25 ) and a corresponding one of the front tubes ( 20 ) and the rear tubes ( 21 );

a connecting rod ( 260 ), fixedly connected to an end of the rotating arm ( 264 ) facing towards a corresponding one of the connection ends ( 200 );

a fixed member ( 263 ), wherein the connecting rod ( 260 ) is vertically and slidably connected to the fixed member ( 263 ), and the fixed member ( 263 ) is fixed to an inner wall of the corresponding one of the connecting ends ( 200 );

a limiting plate ( 262 ), integrally connected to an end of the connecting rod ( 260 ) facing away from the rotating arm ( 264 ), wherein the limiting plate ( 262 ) is perpendicular to the connecting rod ( 260 ); and

a spring ( 261 ), disposed between the limiting plate ( 262 ) and the fixed member ( 263 ), wherein the spring ( 261 ) is in a compressed state; and

wherein the wheel ( 25 ) is fixed to other end of the rotating arm ( 264 ), the fixed member ( 263 ) is fixed to a side wall of the corresponding one of the front tubes ( 20 ) and the rear tubes ( 21 ), there are at least two engagement angles between the rotating arm and the connecting end ( 200 ), and one of the at least two engagement angles is configured to retract the wheel ( 25 ) into the frame ( 1 ).

5 . A stroller, comprising a stroller frame, an infant seat ( 7 ), wherein the stroller frame comprises front tubes ( 20 ) and rear tubes ( 21 ), and the stroller frame further comprises:

a frame ( 1 ), defining an accommodation space ( 14 ) to accommodate the front tubes ( 20 ) and the rear tubes ( 21 ); and

sliders ( 23 ), movably connected to the front tubes ( 20 ) and the rear tubes ( 21 ), and configured to drive the front tubes ( 20 ) and the rear tubes ( 21 ) to move into the accommodation space ( 14 );

wherein the stroller frame has an unfolded state and a folded state; when the front tubes ( 20 ) and the rear tubes ( 21 ) extend out of the accommodation space ( 14 ), the stroller frame is in the unfolded state and is maintained in a stable configuration; when the front tubes ( 20 ) and the rear tubes ( 21 ) are retracted into the accommodation space ( 14 ), the stroller frame is in the folded state and is maintained in a stable configuration;

wherein the frame ( 1 ) further comprises a locking mechanism ( 4 ) configured to lock each of the sliders ( 23 ) to the frame ( 1 ) when the stroller frame is in the folded state, the locking mechanism ( 4 ) comprises an unlocking post ( 40 ) rotatably connected to a top end of the frame ( 1 ), a reverse wedge-shaped locking tab ( 42 ) extends outward from a side of the unlocking post ( 40 ), a positive wedge-shaped locking tab ( 41 ) extends vertically outward from a surface of each of the sliders ( 23 ) facing towards an inside of the frame ( 1 ), and the positive wedge-shaped locking tab ( 41 ) is engaged with the reverse wedge-shaped locking tab ( 42 ); and

wherein the infant seat ( 7 ) is fixed to a front side of the stroller frame.

6 . The stroller as claimed in claim 5 , wherein a backpack ( 8 ) is fixed to a rear of the frame ( 1 ).

7 . The stroller as claimed in claim 5 , wherein a number of the front tubes ( 20 ) is two, a footrest ( 24 ) is disposed between the two front tubes ( 20 ), and the footrest ( 24 ) is configured for an infant to step on when the infant is seated.

8 . The stroller as claimed in claim 5 , wherein sunshade mounting members ( 11 ) are disposed on the frame ( 1 ), and a sunshade ( 9 ) is mounted on the sunshade mounting members ( 11 ); a connecting tube ( 110 ) is fixed perpendicularly to a side of each of the sunshade mounting members ( 11 ), fixing rods ( 90 ) are fixed to the sunshade ( 9 ), and a corresponding one of the fixing rods ( 90 ) is inserted into the connecting tube ( 110 ); and a set screw ( 111 ) is threadedly connected to a side of the connecting tube ( 110 ) and abuts against the fixing rod ( 90 ).

9 . The stroller as claimed in claim 5 , wherein a pull rod ( 3 ) is fixed to the frame ( 1 ), the pull rod ( 3 ) is a telescopic rod, and the pull rod ( 3 ) is configured to be retractable into the frame ( 1 ) when the pull rod ( 3 ) is in a contracted state.

10 . The stroller as claimed in claim 5 , wherein an armrest ( 6 ) is fixed to the frame ( 1 ), and the armrest ( 6 ) is configured to provide hand placement for an infant when the infant is seated.

11 . The stroller as claimed in claim 5 , wherein shoulder straps ( 15 ) are disposed at a front side of the frame ( 1 ), and the shoulder straps ( 15 ) are configured to allow the stroller to be carried on a back.

12 . The stroller as claimed in claim 6 , wherein the backpack ( 8 ) is detachably connected to the frame ( 1 ) through a zipper ( 80 ).

13 . A stroller frame, comprising front tubes ( 20 ) and rear tubes ( 21 ), wherein the stroller frame further comprises:

a frame ( 1 ), defining an accommodation space ( 14 ) to accommodate the front tubes ( 20 ) and the rear tubes ( 21 ), wherein the frame ( 1 ) is provided with slide rails ( 12 ) therein, and the slide rails ( 12 ) are disposed in the accommodation space ( 14 ); and

sliders ( 23 ), movably connected to the front tubes ( 20 ) and the rear tubes ( 21 ), and configured to drive the front tubes ( 20 ) and the rear tubes ( 21 ) to move into the accommodation space ( 14 ), wherein each of the slide rails ( 12 ) cooperates with a corresponding one of the sliders ( 23 ) to allow the slider ( 23 ) to slide longitudinally;

wherein the stroller frame has an unfolded state and a folded state; when the front tubes ( 20 ) and the rear tubes ( 21 ) extend out of the accommodation space ( 14 ), the stroller frame is in the unfolded state and is maintained in a stable configuration; when the front tubes ( 20 ) and the rear tubes ( 21 ) are retracted into the accommodation space ( 14 ), the stroller frame is in the folded state and is maintained in a stable configuration; and

wherein rotating mechanisms ( 26 ) are respectively disposed at ends of the front tubes ( 20 ) and rear tubes ( 21 ) facing away from the frame ( 1 ), wheels ( 25 ) of the stroller frame are caster wheels, and the caster wheels are fixed to the rotating mechanisms ( 26 ) respectively; the ends of the front tubes ( 20 ) and the rear tubes ( 21 ) connected to the rotating mechanisms ( 26 ) are referred to as connecting ends ( 200 ); and each of the rotating mechanisms ( 26 ) comprises:

a rotating arm ( 264 ), connected between a corresponding one of the wheels ( 25 ) and a corresponding one of the front tubes ( 20 ) and the rear tubes ( 21 );

a connecting rod ( 260 ), fixedly connected to an end of the rotating arm ( 264 ) facing towards a corresponding one of the connection ends ( 200 );

a fixed member ( 263 ), wherein the connecting rod ( 260 ) is vertically and slidably connected to the fixed member ( 263 ), and the fixed member ( 263 ) is fixed to an inner wall of the corresponding one of the connecting ends ( 200 );

a limiting plate ( 262 ), integrally connected to an end of the connecting rod ( 260 ) facing away from the rotating arm ( 264 ), wherein the limiting plate ( 262 ) is perpendicular to the connecting rod ( 260 ); and

a spring ( 261 ), disposed between the limiting plate ( 262 ) and the fixed member ( 263 ), wherein the spring ( 261 ) is in a compressed state; and

wherein the wheel ( 25 ) is fixed to other end of the rotating arm ( 264 ), the fixed member ( 263 ) is fixed to a side wall of the corresponding one of the front tubes ( 20 ) and the rear tubes ( 21 ), there are at least two engagement angles between the rotating arm and the connecting end ( 200 ), and one of the at least two engagement angles is configured to retract the wheel ( 25 ) into the frame ( 1 ).