| 摘要 |
PROBLEM TO BE SOLVED: To increase interest by changing a game concerning the entering of game balls to a bonus prize-winning port in a game machine such as a so- called right generation machine. SOLUTION: The bonus prize-winning port 8 is arranged on a game board 1. When a big hit occurs as the result of big hit lottery, a motor-driven tulip bonus item 9 is opened a plurality times (e.g. five times) for a prescribed open period (e.g. five seconds). When the open period when the ball enters is a hit open period which is decided by hit open period deciding lottery, the game is changed into the big hit game. COPYRIGHT: (C)2003,JPO
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