| 主权项 |
1. A collapsible stroller comprising a frame, the frame comprising a handle tube, a front leg tube comprising a front wheel assembly, a rear leg tube comprising a rear wheel assembly, and a stroller frame joint assembly connecting the handle tube, the front leg tube and the rear leg tube with each other, the stroller frame joint assembly comprising a mount for a reversible seat, where the reversible seat is mountable in either of a forward or rearward orientation with respect to the stroller frame, the reversible seat comprising at least a backrest portion, a seating portion, an armrest portion and a seat joint assembly connecting the backrest portion, the seating portion and the armrest portion, and the or each mount for the reversible seat comprises a single attachment point for the seat joint assembly, wherein in use, the mount is rotatable with respect to the stroller frame joint assembly during collapse of the stroller, so that each of the handle tube, front leg tube and rear leg tube of the stroller frame, and the backrest portion, seating portion and armrest portion of the reversible seat are all substantially parallel when collapsed, irrespective of whether the reversible seat was in the forward or rearward orientation with respect to the stroller frame,
wherein the reversible seat further comprises a seat safety lock for controlling the opening and closing of the seat joint assembly, the seat joint assembly being movable between a locked state in which the reversible seat is locked into a fully opened state, and a released state in which the reversible seat is collapsible, and wherein when the seat joint assembly is in the locked state, the armrest portion is positioned at a height for normal use, and when the seat joint assembly is in the released state the armrest portion follows the backrest portion of the seat when this is rotated between either of its fully opened or collapsed positions, so as to thereby lay substantially parallel to the backrest portion when collapsed, wherein the seat joint assembly further comprises an armrest stopper, wherein when the seat joint assembly is in the locked state, the armrest portion is positioned at a height for normal use by the armrest stopper, and when the seat joint assembly is in the released state the armrest stopped can be rotated along with the seat joint assembly away from the armrest portion so that the armrest portion is in a free state, or rotated along with the seat joint assembly toward the armrest portion so as to come into contact with the armrest portion, thus causing the armrest portion to be opened, and wherein the seat joint assembly comprises a first engaging member, a second engaging member, a movable slider, an elastic member, a pushing member and an armrest guide block, and wherein the seating portion is fixedly attached to the first engaging member, and the backrest portion is fixedly attached to the second engaging member, the movable slider, the elastic member and the pushing member are arranged between the first engaging member and the second engaging member; and wherein the armrest guide block is fixed at one end of the armrest portion and is movably fitted in guiding grooves of the first engaging member and the second engaging member; and wherein the first engaging member, the movable slider, the pushing member and the second engaging member are connected with each other by means of a pivot pin, the movable slider can be moved in an axial direction of the pivot pin by the pushing member, and the first and second engaging members are engaged or released under the effect of the movable slider. |
