Abstract: A foldable stroller includes a frame, a front wheel component, and a rear wheel component; the frame includes side frames symmetrically positioned on the left and right; a multiple of cross bars are connected between the two side frames; the side frame comprises a front wheel support, a rear wheel support and a push-hold rod; the front wheel support is pin-jointed at the rear end with a sliding sleeve, which is sheathed around the rear wheel support, whose front end is rotatably connected with the front end of the push-hold rod through a rotating seat; a front support rod is pin-jointed between foreparts of the front wheel support and the rear wheel support; a rear support rod is pin-jointed between the push-hold rod and the sliding sleeve; when the frame is in an unfolding state, the sliding sleeve moves on the rear wheel support up to the highest position, and is locked by the locking mechanism on the rear wheel support; and the whole frame of the stroller is of a three-segment structure when folded, with a

Abstract: A brake system of a stroller includes a wheel axle as well as a wheel seat and a wheel hub installed on the wheel axle; a brake crank is pivot jointed with the wheel axle; the wheel hub is provided with a multiple of brake grooves along the circumference direction; the wheel seat and the brake crank are provided with two brake holes and two arc-shaped grooves corresponding to the brake grooves, respectively; the arc-shaped groove is provided on the edge with an inclined ear extruding along the axial direction; a slope of the inclined ear is provided at the higher end with a stretch of terrace; the two brake holes are provided with a brake lever, respectively, which is inserted from the arc-shaped groove and always pushes against into the brake groove under the action of a pressing spring; the two brake levers are connected with an iron ring at the inner end of the inner side of the brake crank; the iron ring is provided with a stop block installed radially corresponding to the inclined ear; the stop block is

Abstract: A foldable stroller includes a bottom support and a front support of a U shape with the opening backward; the bottom support including a bottom plastic part at the front end and two bottom branch pipes vertically pin-jointed to the bottom plastic part; a wheel is installed at the lower part of the bottom plastic part and the rear end of the bottom branch pipe, respectively; the front support comprises a front plastic part at the front end and two front branch pipes vertically pin-jointed to the front plastic part; the bottom plastic part is transversely pin-jointed to the front plastic part; the two front branch pipes are pin-jointed at the rear end with a push rod through an upper joint, respectively; the forepart of the push rod extends forward and is located at the lower part of the front branch pipe, and the push rod is provided at the front end with a lower joint that is locked with the front branch pipe; an X-shaped support is pin-jointed between the two lower joints and the bottom branch pipe; and the