| 摘要 |
The invention provides a game ball, useful for children's safety, which can be detected far enough away a distance by a vehicle-onboard radar. The invention provides a game ball 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 integral 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 said reflector member 12 is imparted with electromagnetic wave reflectivity.
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