| 摘要 |
PROBLEM TO BE SOLVED: To prevent a plurality of boards for control of a game from being adversely affected by noises generated from game balls as well as by noises caused by electromagnetic waves generated from a grounding wire which induces static electricity eliminated from the game balls and to further enhance measures against noises. SOLUTION: A conductive protective wall 31 having a predetermined height is disposed on the outer periphery of a center opening 30a in a back mechanism plate 30 in such a manner that it surrounds the outsides of a main control board 39 mounted on a game board, a symbol control board 40, a lamp control board 42, and a sound control board 43, so that even if noises caused by electromagnetic waves are radiated by a static discharge into air from the grounding wire 62 disposed at a left end, the noises radiated toward the game control boards 39, 40, 42 and 43 can be shut off by the conductive protective wall 31, particularly by a left wall part 31a thereof. Noises generated from the game balls 25 moving along a tank rail 34 can be shut off by the conductive protective wall 31, particularly by an upper wall part 31b thereof; noises generated from the game balls 25 moving along a dispensing apparatus 35 and a game ball guiding passage 36 can be shut off by the right wall part 31c and the left wall part 31d.
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