| 摘要 |
PROBLEM TO BE SOLVED: To provide an easily identifiable ventilation film of a case by disposing index parts of different color tones in at least a part of the ventilation film. SOLUTION: The index parts 70 of different color tones are disposed in at least a part of the ventilation film 7 that is disposed so as to cover vent holes 120 for communicating the internal space S of the case 1 with the outside and has permeability and water proofing property. By employing the ventilation film 7 in the ventilation structure of the case 1, contrast discrimination can be performed easily in the case 1 generally of a single color by difference between the color tone of the ground color of the ventilation film 7 and the color tone of the index parts 70 of different color tones disposed in the ventilation film 7, and peeling of ventilation film 7, forgetting about sticking of the ventilation film, and the like can be easily recognized. Further, the ventilation film 7 can prevent invasion of dust or infiltration of water from the outside of the case 1, which is an original purpose. COPYRIGHT: (C)2011,JPO&INPIT
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