Patent ID: 6883817
Filing Date: 2005-04-26
Classification: B62K

Abstract:
1. An improved folding bicycle structure comprising: a retractable front tube set including an outer tube having an inner tube therein, an action rod having a top and a bottom being provided in said inner tube; a first handle being provided on a first side of said top of said action rod, and a second handle being provided at a second opposing side of said top of said action rod; an eccentric rotation device being pivotally coupled and releasably engagable with said top of said action rod; a coned piece being coupled adjacent at said bottom of said action rod, said action rod displaces said coned piece into said inner tube to expand said inner tube in said outer tube for fixing a position thereof responsive to rotation of said eccentric rotation device; a seat tube having a distal end pivotally connected to said front tube set, said seat tube being provided with a saddle at a top end of said seat tube; a rear tube having a top end pivotally connected to said seat tube; a fastening device being provided between said rear tube and said seat tube, said fastening device fixing said seat tube when said rear tube pivotally rotates with respect to said seat tube to unfold; and a joint link connected between said front tube set, said seat tube and said rear tube for displaceably interconnecting said front tube set, said seat tube and said rear tube to unfold and fold with respect to one another.