| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ball for a game board with which anyone can easily change a rolling direction and rolling speed according to a rolling speed or the position of a weight provided inside and does not need addition of a magnet device to the game board for changing the ball rolling direction. <P>SOLUTION: The ball 1 for a game board includes a spherical ball body 2 and the weight 5 provided to a position shifted from the center in the ball body 2. When the weight 5 is positioned on the left side with respect to the rolling direction and rolled, the ball 1 for a game board rolls while changing its direction to the left side; when the weight 5 is positioned on the right side with respect to the rolling direction and rolled, the ball 1 for a game board rolls while changing its direction to the right side; and when the weight 5 is positioned in almost the center with respect to the rolling direction and rolled, the ball 1 for a game board rolls almost straightforwardly but changes the rolling speed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
