| 摘要 |
PROBLEM TO BE SOLVED: To provide a safety valve mechanism of a closed container using a highly reliable motional part and having high airtightness in a simple structure. SOLUTION: It is a safety valve mechanism 1 to prevent immersion of outer fluid in a closed container 6 and to release fluid pressure in the inside of the closed container 6 outside when it becomes high. As a ring type sealing member 3 is fitted in a groove part 4 in an extended state, the sealing member 3 is pressed on an exhaust port 5a by reaction force of extending force. Consequently, when the fluid pressure of the closed container 6 exceeds the reaction force of the extending force, the sealing member 3 extends in the diametrical direction and releases fluid. |
