| 摘要 |
PURPOSE: Provided is an air resistance induced light-emitting ball for use in a leisure ball game to enable users to play ball games even in a dark place where no illumination is present. CONSTITUTION: The air resistance induced light-emitting ball for use in a leisure ball game includes a rotational force generator(101) for generating rotational force by using air resistance that is generated whenever the ball moves in the air; an electromotive force generator(102) for generating designated electromotive force by using the rotational force generated by the rotational force generator; and an illuminator(103) for generating a light by using the electromotive force generated by the electromotive force generator(102).
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