| 摘要 |
PROBLEM TO BE SOLVED: To open a tamperproof cover only by cutting a screw fastening part by mounting a screw fastening mechanism and a tamperproof covering mechanism on a sealing part of a substrate case of a game machine separately from one another, and mounting a covering part of the tamperproof cover storing a spare screw, separately from the area of the screw fastening mechanism. SOLUTION: When a substrate base side case A obtained by fastening a main circuit substrate 2 on a substrate mount base 1 is to be mounted on a substrate cover side case B, the screw mount hole cylinders 5 of a projecting plate part 3 of the case A are inserted into the screw insertion cylinders 10 of a projecting plate part 8 of the case B, and a projecting plate for locking 7 is penetrated through an open window 14 and positioned. Then one of four screw mount hole cylinders 5 is fastened by inserting a screw 17 from a front surface of the case B. Then a tamperproof cover 15 is pressed along a partition 12 to cover the screw insertion cylinder 5 in a state that it is demountably locked by locking a hook-shaped elastic locking piece mounted inside the tamperproof cover 15 with the projecting plate for locking 7 over a projecting plate for locking 17.
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