Patent ID: 7198281

Claim:
A foldable bicycle, comprising: a bicycle frame, having a front portion, a rear portion, and a body frame connecting said front portion with said rear portion, wherein said body frame having a triangular structure comprises three supporting members connecting with each other; two driving wheels rotatably mounted to said front and rear portions of said bicycle frame; and a folding arrangement, which comprises: a folding joint provided at one of said supporting members to pivotally connect said front portion of said bicycle frame with said rear portion thereof; and a detachable connecting joint provided at another said supporting member to form said respective supporting member into two detachable engaging portions so as to disengage said triangular structure of said body frame, such that when said two detachable engaging portions are detached from each other, said front portion of said bicycle frame is adapted to pivotally fold towards said rear portion thereof via said folding joint to overlap said two driving wheels so as to fold up said foldable bicycle with a compact structure, wherein said folding joint comprises a pivot pin, a joint body having a pivotal cavity defined by a top cover and two side mounting walls of said joint body, and a fold guider pivotally mounted on said two side mounting walls within said pivotal cavity via said pivot pin, such that said fold guider is capable of pivotally folding to flip out of said pivotal cavity, wherein a supporting member pivotally connecting with said folding joint has a first portion and a second portion connecting with said fold guider and said joint body respectively so that said first portion and said second portion of said supporting member are capable of folding towards each other for folding said front portion towards said rear portion of said bicycle frame to form said compact structure, wherein said fold guider has a connecting base, a tubular axial holder, having a through axial slot, formed on a first side edge portion of said connecting base, and a lock holder formed on a second side edge portion of said connecting base, wherein said pivot pin is slidably inserted into said axial slot of said tubular axial holder for pivotally connecting said fold guider with said joint body at said two side mounting walls thereof.