| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve fuel-saving traveling in a two-wheeler with a motor, and high-speed cruising and reduction of fatigue in long-distance traveling in a bicycle using a simple means by decreasing energy loss due to air resistance in traveling of the two-wheeler. Ž<P>SOLUTION: In order to prevent energy loss due to an ambient air current of a rider, this back pack shaped to hardly cause a swirl of an air current is shouldered or worn as clothes at the back of the rider, whereby the occurrence of a swirl of air is restrained to achieve decrease in energy loss. As to the shape for achieving the above, the sectional area thereof is gently decreased as it goes backward with respect to the traveling direction so that the area of the rear end part is close to zero. This shape may be formed only in the traveling state of the two-wheeler, and a back pack forming the above shape by traveling air pressure and wearing materials such as clothes may be included. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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