| 摘要 |
PROBLEM TO BE SOLVED: To provide a shape changeable ball with a hollow spherical shape which is made invertible from the surface side thereof to the internal surface side. SOLUTION: A ball body 1 is formed out of a rubber-like soft material and has a hollow spherical shape with a hole 2 bored in one side thereof. The ball body 1 is turned inside out through the hole to make it invertible from the front surface side 11 to the internal surface side 21. Protrusions and recesses for shifting one shape to another are formed in one or both of the external surface side 11 and the internal surface side 21 of the ball body 1. COPYRIGHT: (C)2004,JPO
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