| 摘要 |
PROBLEM TO BE SOLVED: To make a mechanism of a gas spray valve, with which a gas can be easily re-injected after a gas container is used up, and which is stronger and more rigid and can be inexpensively manufactured. SOLUTION: An end of a gas passage hole 111 of a valve pin 104 is placed to open above a second seal ring 108 when the valve pin 104 is at a raised position, and to open below the second seal ring 108 when the valve pin 104 is pushed in a first stage and a second stage. A gas supply hole 118 which makes the inside of a gas container 102 communicate with a fixed quantity chamber 110 inside a first seal ring 106 only when the valve pin 104 is at the raised position is provided. When the valve pin 104 is pushed in the second stage, a smaller diameter portion 104a of the valve pin enters below the first seal ring 106, and the inside of the gas container 102 and the fixed quantity chamber 110 communicate with the gas passage hole 111, thereby permitting the gas to be re-injected. |
