ADJUSTABLE HANDLEBAR FOR BICYCLE

摘要

An adlustable handlebar for a bicycle according to the invention comprises two handlebar members whose adjacent ends are pivotally supported by two bolts whose extended axes are crossing in front of the bicycle, gear teeth formed in the adjacent ends of the handlebar members so as to pivotally move one handlebar member by pivotally moving the other handlebar member, two sets of isosceles triangle-shaped thrust serrations at adjacent ends of the handlebar members and an upper portion of a handlebar stem thereby anchoring the handlebar members when the bolts are tightened and moving the adjacent ends of the handlebar members away from the upper portion of the handlebar stem when the bolts are loosened and the handlebar members are rotated, and a cam and cam follower assembly having a lever for engaging and disengaging the serrations, thereby simply changing positions of handlebar members symmetrically. …The upper portion of the handlebar stem is formed by a rear part and a front part pivotally movable relative to the rear part in a substantially vertical direction about a substantially horizontal axis in transverse direction of the bicycle and clamped to the rear part by clamping means, thereby enabling inclined angles of grips of the handlebar to be changed.