| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine which can prevent a fraudulent attempt to open a board housing box and that to secretly replace it with a replica. SOLUTION: A circuit board box 62 is mounted on a mounting base 150 by a mounting fastening means (one-way screw 160, mounting protrusions 148a-148c and mounting piece parts 156a-156c) being irreversibly fastened while a lid body 80 is assembled on a box body 110 by an assembly fastening means (one-way screw, mounting piece parts 83a-83c and a mounting piece) being irreversibly fastened. Thus, the closure of the circuit board box 62 is made irreversibly fastened and the irreversibly fastened mounting of the circuit board box 62 on a pinball game machine (mounting base 150) enables the prevention of the fraudulent attempt to open the circuit board box 62 and that to secretly replace it with a replica. COPYRIGHT: (C)2006,JPO&NCIPI
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