Collapsible frame structure for a child's push chair

A collapsible frame structure for a child's push chair, the structure comprising, when extended, a pair of side frames in substantially parallel planes, a collapsible X frame in a plane transverse to the planes of the side frames, respective ends of said X frame being pivotally connected to two locations on each of said side frames, means for maintaining said X frame extended, and wheels adjacent the free ends of the X frame, characterised in that each said side frame has first and second elongate members (10, 11) which are maintained in spaced relationship by third and fourth (12, 13) elongate members which extend between respective opposite corners (15, 16 and 17, 18) of a quadrilateral which is defined by two points on each of said first (10) and second (11) members, said third (12) and fourth (13) members being pivotally interconnected and also pivotally connected to said points (15, 16, 17, 18) on the first (10) and second (11) members, and hinge means (19) for allowing said third (17) and fourth (13) members to be folded intermediate their pivotal interconnection (14) and their respective connections with a first two (17,15) of the adjacent corners on said quadrilateral, said adjacent corners being defined by points on respective ones (10, 11) of said first and second members, respective ends of said X frame (21) being pivotally connected to two locations (22, 23) on each of said side frames adjacent the other two corners (16, 18) of said quadrilateral.