| 摘要 |
PROBLEM TO BE SOLVED: To improve the original game property of a pinball machine and to simplify control in the pinball machine provided with two upper and lower pairs of movable pieces at a center generator. SOLUTION: At the center generator 14, a right and left pair of upper movable pieces 20A for opening and closing an upper big prize-winning port 19A and a right and left pair of lower movable pieces 20B for opening and closing a lower big prize-winning port 19B are provided. In a game area, first and second starting ports 15 and 16 are provided. When a game ball enters the first starting port 15, only the upper movable piece 20A is open-operated for a prescribed period. When a game ball enters the second starting port 16, only the lower movable piece 20B is open-operated for a prescribed period. COPYRIGHT: (C)2006,JPO&NCIPI
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