| 摘要 |
PROBLEM TO BE SOLVED: To prevent a fraudulent modification of a control board by securing that detachment from a board case leaves the trace. SOLUTION: A case body 20 has a plurality of attaching parts 50 for attaching a case cover 30 through breaking parts 52 on the case body side projecting from the case body, and the case cover has a plurality of fixing parts 70 which can be fixed on each attaching part corresponding to the plurality of attaching parts 50, respectively, and have breaking parts 71 projecting from the case cover 30. At least one of the fixing parts 70 is attached to the attaching parts 50 corresponding to the fixing parts 70, and a game machine through lockscrews inserted into the fixing parts 70, and the lockscrews are formed so that the rotation to the screw-in direction is easy according to the twisting motion by a driver.
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