| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal pressure adjustment structure in which a waterproof packing constituting a waterproof portion of waterproof equipment and an elastic body for internal pressure adjustment are formed with one material, without needing a dedicated elastic body for internal pressure adjustment.SOLUTION: In an internal pressure adjustment structure in waterproof equipment, a waterproof unit 2 inside communication equipment 1 has airtightness by fitting a fitting groove of a waterproof packing upper part 3 and a fitting rib of a waterproof lower part 4. When displacement of a button 5 is transmitted to the waterproof packing upper part 3, internal pressure increases with volume decreases of the waterproof unit 2. Internal pressure adjustment parts 40, 41 provided in the waterproof packing lower part 4 are expanded to deform, and thereby reduces increase in internal pressure.SELECTED DRAWING: Figure 1 |
