Patent ID: 8157286
Filing Date: 2012-04-17
Classification: B62B

Abstract:
1. A stroller having an expanded and fixed state and a folded state, comprising: a pair of support racks which respectively include a coupling holder including a lower side fastened to a front tube and hinged a rear tube, the rear tube being movable towards the front tube for folding, and the front tube containing an extension hole near the middle thereof and a folding hole near a lower end thereof; a handlebar which is bent and includes two ends to connect and slide on the front tube and includes an aperture corresponding to the extension hole; a linking rack to connect with the rear tube and the handlebar to form a linking mechanism for folding; a pair of folding drivers which are connected with two ends of the handlebar corresponding to the front tube to control sliding and anchoring of the handlebar on the front tube and include a lower driving lump, a upper driving lump, an elastic pin and an elastic member, the lower driving lump containing a pin hole corresponding to the aperture of the handlebar and a trough around the pin hole that contains sloped sides, the elastic pin running through the pin hole and containing an elastic element at an upper end, a pin at a lower end and a washer near the middle thereof formed at a diameter greater than the pin, the upper driving lump and the lower driving lump being slidable relative to each other, the upper driving lump containing an upper trough corresponding to the elastic element to butt the elastic pin, the elastic member being interposed between the upper driving lump and the lower driving lump; a folding control set which is mounted on the handlebar corresponding to the folding drivers to control the folding drivers and includes a pressing seat, a rotary disk, two flexible links, a safety lock and an elastic component, the pressing seat being hinged on the rotary disk through a hinge element to form an eccentric coupling relationship for turning the rotary disk by pressing the pressing seat, the rotary disk containing a lug at a selected position on the perimeter and holding the flexible links at symmetrical locations inside; the safety lock being slidable on the handlebar near the lug of the rotary disk and movable reciprocally on the handlebar through the elastic component; a plurality of front wheels which are fastened to a lower end of the front tube and contain a direction setting member to set direction of the front wheels; and a rear wheel set which is fastened to a lower end of the rear tube and allowable to be braked synchronously or released to brake concurrently.