| 摘要 |
<p>The adapter has a silicon/hollow resilient valve (30) mounted in a mounting recess of a base (10) and a dosing tube (20). A positioning ring is mounted on the bottom of the base, where an upper end of the ring is selectively abutted to a stop of the dosing tube. A bendable portion is formed around the upper end of the positioning ring. A plunger (33A) is formed on the bendable portion and protrudes into an injection tube (21) of the dosing tube. An air chamber is defined in the positioning ring, the bendable portion and the plunger and communicates with the exhaust channel of the base.</p> |
