| 摘要 |
PROBLEM TO BE SOLVED: To detect a slight opening of the door of a game machine, early find a fraudulent act from the door, facilitate the attachment and setting of the detector, and reduce labor to install. SOLUTION: The door opening and closing detector 1 detects the opening and closing of the door 51 of the game machine 50 equipped with the door 51 and a support 52 openably supporting the door 51. The door opening and closing detector 1 has a light emitting section 2a casting light, a light receiving section 2b receiving the light cast from the light emitting section 2a, a sensing means to output the value of a sensing signal varying in accordance with an optical path length from the light emitting section 2a to the light receiving section 2b, a determination means to compare the value of the sensing signal with a prescribed reference value and determines the opening or closing of the door 51, an automatic reading and storage means to automatically read and store the reference value. The determination means determines whether or not the door 51 is opened or closed by arranging the light emitting section 2a and the light receiving section 2b in prescribed positions of the game machine 50 to ensure that the optical path length varies depending on the opening or closing of the door 51. COPYRIGHT: (C)2008,JPO&INPIT
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