| 摘要 |
PURPOSE: A bicycle having a square piece on a gliding part is provided to prevent the infiltration of the impurities such as dust into the gliding part and to remove dust if the impurities are infiltrated. CONSTITUTION: The bicycle is composed of:frames(3, 4) consisting a sash; a steering piece attached on the frames; a pair of operation wheels placed on the frames in front and rear of the frame to be able to rotate; a sprocket(26) placed around the base part bracket position in the frames; a drive power delivery piece to deliver the rotation power of the sprocket to the rear operation wheel; a pair of pedal levers(22R, 22L) having 180 degrees of phase difference against each other to shake up and down by turns; a crank lever placed between the sprocket and a pedal lever(22) to deliver the power of the pedal lever to the sprocket; a gliding part(40R) acting as a shaking position of the pedal lever; and a square piece having the gliding part.
|
