| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a game ball, useful for children's safety, which can be detected far enough away a distance by an on-board radar. <P>SOLUTION: The game ball is provided wherein a reflector member 12 is disposed within a spherical shell 13, the diagonal distance of the reflector member coincides with the inner diameter of the spherical shell, the reflector member has a shape constructed by combining three regular polygon plates 11A, 11B, 11C, the center angle of one side thereof being an integer submultiple of 90, in such a manner that the centers of the three regular polygon plates are coincident and that the three regular polygon plates are perpendicular to each other, and a surface of the reflector member 12 is imparted with electromagnetic wave reflectivity. <P>COPYRIGHT: (C)2009,JPO&INPIT |
