| 摘要 |
PROBLEM TO BE SOLVED: To provide a housing body which enables detecting and announcing of the release of the housing body holding a control board for handling the control of a game machine, a game machine with the same and a game system equipped with the game machine having the housing body. SOLUTION: A board box 80 housing a main control board 41 is provided with a filling valve 90 and a release valve 91. A helium gas is filled from the filling valve 90 and air is discharged from the release valve 91. The main control board 41 is provided with a helium gas sensor 82 to detect the purity of the helium gas within the board box 80.
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