To prevent an illicit action performed by inserting a tool having a light emitting element such as infrared LED at the tip.
The medal selector 1 generally comprises two sensors. As one sensor, a first set S3a of light emitting element and light receiving element and a second set S3b of light emitting element and light receiving element are provided adjacently to each other, and either the light emitting element S3a-a of the first set or the light emitting element S3b-a of the second set is selectively made to emit light. A CPU of a main substrate 200 of the game machine counts metals based on the output of the light receiving element of the selected set, and determines an illicit action based on output of light receiving signal from the non-selected set.
COPYRIGHT: (C)2006,JPO&NCIPI
Kunihiko Kobayashi
Shusaku Amano
Yoshikazu Tanigawa
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