| 摘要 |
PROBLEM TO BE SOLVED: To provide driving force by rotating a windmill excellently by means of a weak wind. SOLUTION: A wind force driving device is constructed mainly of a wind mill 3 provided with a plurality of wind receiving parts 6, 6, 6 extending radially from the rotary shaft 2, a semicircular cover body 7 which covers the outer circumference on the reverse rotation side rotating reversely to the wind direction of the windmill 3 and can be rotated around the rotary shaft 2, an extension body extended from the cover body 7 in the wind direction, and direction blade bodies 9A, 9B which are stood slantingly in the terminal end of the extension body 8 and receives a wind so as to rotate the cover body 7 in the wind direction. |
