| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electric bicycle capable of reducing a production cost and being mass-produced with a high accuracy. SOLUTION: A body frame 11 having a head pipe part 12, a top tube part 13, and a seat tube part 14 is integrally formed by using metal molds divided in the lateral direction of the bicycle. A power unit 3 rotatably supporting a pedal crank-shaft 2 and having a motor for driving a rear wheel 6 is installed at the lower end part of the seat tube part 14.</p> |
