| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pinball game machine capable of effectively suppressing a cheating action by which a passage of a game ball is falsely detected. <P>SOLUTION: The horizontal width W1 of a first normal winning pocket 21 is set to a predetermined value (for example, 11.2 mm) larger than a diameter of a game ball (for example, 11.0 mm) but smaller than a diameter of a passage bore of a game ball detection switch. Namely, the first normal winning pocket 21 forms a narrow width part NA. A game ball can enter the first winning pocket 21, but a fraudulent ball having a diameter equal to the horizontal width W1 or larger than the horizontal width W1 cannot enter the first normal winning pocket 21. <P>COPYRIGHT: (C)2012,JPO&INPIT |
