Patent ID: 7918467

Claim:
A folding mechanism of a stroller, comprising (a) a rear composite supporting member interposed between and pivoted to two rear supporting rod parts of the stroller; the rear composite supporting member including: two upper horizontal rods; the upper horizontal rods being pivoted together at adjacent inward ends thereof; the upper horizontal rods being each pivoted on a corresponding said rear supporting rod part at an outward end thereof; two lower horizontal rods; the lower horizontal rods being pivoted together at adjacent inward ends thereof; the lower horizontal rods being each pivoted on a corresponding said rear supporting rod part at an outward end thereof; and an upright rod; the upright rod being pivoted on a pivotal joint between the upper horizontal rods; the upright rod being pivoted on a pivotal joint between the lower horizontal rods; the upright rod having a through hole; (b) a composite fixing member to fix the rear composite supporting member in an expanded position; the composite fixing member including: a fixing component securely joined on the upright rod of the rear composite supporting member; the fixing component having a through hole facing the through hole of the upright rod; the fixing component having an holding gap thereon; a pressing component held in the holding gap of the fixing component; the pressing component having a joining stick; the pressing component being joined on the fixing component with the joining stick being held in the holding gap and passed through the through holes of the fixing component and the upright rod; an elastic element, which is positioned around the joining stick with two ends thereof contacting the fixing component and the pressing component; the elastic element biasing the pressing component away from the holding gap of the fixing component; a gripping piece to fix the lower horizontal rods of the rear composite supporting member in an expanded position; the gripping piece having a joining hole; the gripping piece being joined on the joining stick of the pressing component with a joining piece being passed through the joining hole and joined to the joining stick so that the gripping piece is movable together with the pressing component; the gripping piece having an embedding groove; the lower horizontal rods being at least partly held in the embedding groove of the gripping piece so as not to pivot relative to each other when the rear composite supporting member is in said expanded position.