| 摘要 |
PROBLEM TO BE SOLVED: To reconcile the operability for volume control from the front side and the biting prevention of a wire. SOLUTION: A volume operating member 21 is provided on the front wall of a game machine frame body 1 which is a fixed side member for an upper tray device 6, and the volume operating member 21 can be easily operated from the front side by opening the upper tray device 6. No play is required for opening or closing the upper tray device 6 on the wire connecting a volume switch 22 operated by the volume operating member 21 and a control device fitted on the back side of the game machine frame body 1, and the wire is prevented from being bitten between the upper tray device 6 and the game machine frame body 1 when the upper tray device 6 is closed.
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