| 摘要 |
PROBLEM TO BE SOLVED: To prevent the intrusion of an intruding article such as a piano wire without receiving restriction of a game area regardless of the intrusion from the lower or side part of a game board, and to prevent fraudulent winning or winning rate increase by bending a crucial nail of a start port or destroying a component for instance. SOLUTION: The game machine includes a front surface frame set having a window part through which a game area where game balls roll can be visually recognized on the front surface of the game board, and the component is provided so as to project from the game board surface to the window part side inside the game area. The window part includes at least two layers of transparent plates, the transparent plate on the game board side is provided with a recessed part, and the front end part of the protective member is engaged with it. COPYRIGHT: (C)2011,JPO&INPIT
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