| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine preventing a fraud to a game control board and easily and surely determining the execution of the fraud when the fraud is done. SOLUTION: A second projecting piece part 244 of a board case 214 is provided with a claw member 248, and the claw member 248 is engaged with a nut member 250 that tends to rotate in a rotating-direction one side to prevent the rotation and fix the nut member 250. The bolt member 218 is rotated in the rotating-direction one side to enable relative rotation between the nut member 250 and a bolt member 218 and progress the engagement degree of both. Meanwhile, the claw member 248 is non-engaged with the nut member 250 that tends to rotate in the rotating-direction other side to allow the rotation of the nut member 250. When the bolt member 218 tends to rotate in the rotating-direction other side, the nut member 250 and the bolt member 218 co-rotate toward the rotating-direction other side to prevent the release of the threaded engagement state of both. COPYRIGHT: (C)2009,JPO&INPIT
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