| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine which permits the presence of magnets over a wide range to be accurately detected while preventing limitations from being put on the arrangement of a circuit and a mechanism portion for achieving intrinsic functions in a game machine. SOLUTION: A magnetic field detection element 130 detects a change in impedance due to a magnetic field given from the outside and outputs detection voltage based on the amount of change to amorphous wires arranged along three axes intersecting each other at right angles. When detecting an exceeding of the detection voltage of the magnetic field detection element 130 over a prescribed threshold value, a comparator 151 determines that magnets are present in the vicinity of the game machine. The comparator 151 determines on the basis of the threshold value set to a value taking into account a variation in the detection voltage which is based on the influence of a geomagnetism on the magnetic field detection element 130. COPYRIGHT: (C)2010,JPO&INPIT
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