| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine which can make a visually recognizable proof mark leave to clearly show the application of external forces when the forces are applied to an extent enough to elastically deform a lid or the body itself of a board case for housing a control board expanding a clearance between the lid and the body. SOLUTION: The game machine includes a proof mark clarification member 44 which clearly indicates a crack 60 as a proof mark for clearly showing the application of external forces by a change to a broken state easily identifiable as caused under the external forces when the forces are applied to extent enough to deform the body 42 or the lid 41 for expanding the clearance between the lid and the body while at least either one of the body 42 and the lid 41 is kept sealed by a sealing means. COPYRIGHT: (C)2010,JPO&INPIT
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