| 摘要 |
PROBLEM TO BE SOLVED: To reduce a bulge to one side for improving riding performance by arranging batteries separated to encircle a mainframe, instead of arranging the batteries together only one side of the main frame. SOLUTION: A drive part to drive a wheel, a battery 12 to supply power to the drive part and a battery case 10 secured in proximity to a stand pipe 2 as a main frame to store the battery therein are provided. The battery case 10 is formed in a sectional shape with a recess 10c to cover at least part of the outer periphery with the cross section of the stand pipe 2. |
