Elevational adjusting device of exercise bicycle

摘要

An elevational adjusting device is used in an exercise bicycle which has a body capable of standing on the ground. The body is movable by a treading operation. A cushion of the bicycle is adjustable. The elevational adjusting device comprises an outer tube having a hollow inner space and a long hole; an inner tube being installed with a cushion at a top thereof; the inner tube having a plurality of positioning holes which are positioned corresponding to a position of the long hole of the outer tube; a frame seat fixed to the outer tube; and a positioning unit having a post; the positioning unit being positioned to the frame seat; the positioning unit having a buckle bar capable of being buckled to one of the positioning holes of the inner tube; a driving arm; and a cam portion capable of resisting against an wall of the inner tube.