| 摘要 |
PURPOSE: A reciprocating motion of a board is converted to a rotation motion, thereby riding the board as a bicycle, thereby providing various physical activity. CONSTITUTION: A foot step(10) of a footing(11) is provided for a pedaling. A handle(60) is installed to be held by both hands. A rack gear(20) connected to the footing moves by the pedaling. A main driving gear(30) connected to the rack gear is rotated. The rotation of the main driving gear is transferred to a wheel shaft to rotate the wheel.
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