| 摘要 |
PURPOSE: To provide a plastic case which discharges the air in the case to the outside by a simple structure and resists changes in service temperature and which is high in sealability. CONSTITUTION: A plastic case consists of a lid 1 provided with a raised part all around its periphery and a lid 2 provided with a recessed part engageable with the raised part all around its periphery, a groove 5 in communication with the recessed part and a small hole 4. The engaging parts of the recessed and raised parts are filled with silicon seal material and are bonded together under pressure and the small hole 4 is filled with silicon seal material. |
