| 摘要 |
PURPOSE:To provide an instantaneous cap which does not become an obstacle at the time of usage, can be easily operated and being strong. CONSTITUTION:Drop-in grooves 4, 4a and gradient grooves 5, 5a are formed on a cap main body side, and a protuberance 10a which is fitted in said grooves is formed on a closing cap 9 side. The cap is opened/closed by letting a seal boss 7 go in or out to an open port 11 by the relationship between the gradient grooves 5, 5a and the protuberance 10a. By this method, the cap can be opened/ closed by approximately one half of a turn, and at the same time, the cap does not become an obstacle at the time of usage, and is hard to be destroyed due to the simple constitution, and the manufacture cost is cheap. |
