| 摘要 |
PROBLEM TO BE SOLVED: To eliminate all noises by applying metal plating on a game board frame to have a common grounding and performing the connection to an external connection terminal via a resistor. SOLUTION: Chrome plating is applied to a game board frame mounted to the rear side of a front frame 12, that is, a middle plate 57 to have a common earth with a conductivity. The plate 57 is fixed to a the frame 12 provided with a ball shooter 42 by means of a machine screw 72, and no parts except for a fixing lever 49 on a fixing shaft 48 is mounted thereto. An upper tray prize communication part 62 mounted in the plate 57 is also applied with chrome plating, and static electricity generated is current curried to the plate 57. An earth contact element is provided at a right upper part of the plate 57, it is electrically contacted with an earth terminal of an external connection terminal board provided in a mechanism board via a resistor when the mechanism board is closed.
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