| 摘要 |
PROBLEM TO BE SOLVED: To provide an excess pressure release valve, easy to be manufactured and having a simple shape, which can achieve both activities of releasing excess pressure and preventing intrusion of moisture and water while releasing stably and definitely the excess pressure over a long period of time even with a small size and a simple structure and while enabling release for a plurality of times to even few ten thousand times.SOLUTION: In the excess pressure release valve 1, an inner cover 10 and an outer cover 30 are mounted to an airtight container 40 while integrating in order to release inner excess pressure to the outside; wherein, in the inner cover 10, a hole 12 for airtight sealing to the container 40 is communicated, and the outer cover 30 covering the inner cover 10 and enclosing a dome shaped elastic body 20 has an opening hole 33 to the outside. The dome shaped elastic body 20 is pressed and pinched by the inner cover 10 and the outer cover 30, in which a dome opening part 24 comes in contact, causing compression, and with a bias force given by the compression, the hole 12 for airtight sealing is closed airtightly from the outside at a dome top 21 in a manner of being openable with an excessive pressure. Also, a notch 23 is provided to lead the excess pressure to the opening 33 at the opening part 24 of the dome. |
