| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pinball game machine having a plurality of ball detection means, configured to detect big-ball fraud while preventing an increase in processing load. <P>SOLUTION: In fraudulent ball checking processing, a warning signal is transmitted (S270) when a detection counter detects that a period in which H level of a detection switch of one of a first start pocket SW and a winning pocket SW continues 50 times (100ms). Upon occurrence of the big-ball fraud, a detection SW of the winning pocket detects a big ball set in the winning pocket for the period where the ball is irradiated with electric waves, so that H level of a detection switch continues longer than that in normal winning. The game machine detects and warns of the above fraud, to prevent the big-ball fraud. The determination is made on the basis of the time from when the level of one of the first start picket SW and the winning hole SW becomes H to when both the detection levels become L, thereby reducing the processing load required for detecting fraud even when there are a plurality of winning pockets. <P>COPYRIGHT: (C)2013,JPO&INPIT |
