| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ventilation unit which prevents foreign objects from entering into a housing from a space between a ventilation member and the housing even under an environment on which high external pressure acts. <P>SOLUTION: A ventilation unit 1 includes: a ventilation member 2 attached to an opening 11 of a housing 10 and including a waterproof ventilation film 4 for covering the opening 11; a sealing member 6 sealing a gap between the housing 10 and the ventilation member 2; and a washer 7 pressed against the housing 10 by the ventilation member 2 around the sealing member 6. The washer 7 closes a gap between a peripheral part of the ventilation member 2 and the housing 10, which is formed on the outer side of the sealing member 6 when the ventilation member 2 is attached to the opening 11 of the housing 10. <P>COPYRIGHT: (C)2013,JPO&INPIT |
