Patent ID: 7712843

Claim:
Structure of a foldable front wheel of a golf cart, comprising (a) a supporting component; the supporting component including a shaft holding part; the shaft holding part having a stopping protrusion around one end thereof; the shaft holding part having a polygonal fixing portion behind the stopping protrusion; the shaft holding part having a round pivotal portion behind the polygonal fixing portion thereof; and (b) a joining shaft interposed between and joined to both the supporting component and a front round rotating member; the joining shaft including: a shank part; the shank part being held in the shaft holding part of the supporting component at one end thereof; an elastic element positioned in the shaft holding part of the supporting component to bias the joining shaft to such a position that the joining shaft is prevented from rotating by the supporting component; and a fixing component secured around other end of the shank part; the fixing component having a containing room; the stopping protrusion of the supporting component being confined in the containing room; the fixing component having a polygonal hollow fixing portion adjoining and communicating with the containing room; the elastic element biasing the joining shaft towards such a position that the polygonal hollow fixing portion of the fixing component fits closely around the polygonal fixing portion of the supporting component to prevent the joining shaft from turning relative to the supporting component; the joining shaft being capable of rotating after having been pushed so as to relocate the polygonal hollow fixing portion of the fixing component around the round pivotal portion of the supporting component.