| 摘要 |
PROBLEM TO BE SOLVED: To avoid an operation driven by a vibration due to other than a fraudulent act while maintaining a function of detecting an abnormal vibration due to the fraudulent act by a vibration detection sensor.SOLUTION: When a glass frame 16 opens, the game machine sets an invalid flag F to (1) and starts a timer circuit portion 150T. Furthermore, it resets the invalid flag F to (0) when a predicted prescribed time period during which, for example, clogged ball removal work is finished elapses. As a result, the game machine does not erroneously determine a vibration due to a closing operation of the glass frame 16 during the clogged ball removal work and after the work, as an abnormal vibration. |
