| 摘要 |
PROBLEM TO BE SOLVED: To provide an aspiration sensor for surely and rapidly sensing an aspiration action even when a small amount of air is sucked by the aspiration action. SOLUTION: The aspiration sensor includes: an outgoing channel through which the inside air is sucked, and a valve channel (28) through which the inside air is sucked out, both performing their operations along with the aspiration action of a user; a valve port (36) formed on the way of the valve channel (28); a flap-like valve element (40) which is disposed on the downstream side of the valve port (36) and opens the valve port (36) at a timing of the aspiration action; and optical transceivers (46, 54) for detecting an opening operation of the flap-like valve element (40). COPYRIGHT: (C)2009,JPO&INPIT
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