| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a conventional pachinko game machine that foreign materials tend to enter because various apparatuses are exposed at the rear side of the game board and troubles tend to occur because of static electricity. SOLUTION: A box body structure is made by fixing a base door 33 supporting a game board 32 on an opening of a boxy base frame. Apparatuses fixed behind the game board 32 are contained in the boxy body. Therefore, foreign materials will not enter from outside to the apparatuses like a ball tank 48 and ball jamming or other troubles will not occur. Because circuit boards can be located at a rear face 35a, far from the rear of the game board 32 having a ball passage, circuit boards will not easily influenced by the static electricity caused by ball movement and malfunctioning on the game control will be alleviated. Because the flat copper braided wire 45 is fixed on the inner surface of the base frame 35, the inner space of the box body is electrostatically shielded and the circuit board is not influenced by static electricity occurred outside.
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