| 摘要 |
PROBLEM TO BE SOLVED: To avoid blinding of a filter caused by contact with liquid, and maintain good use condition at all time by setting an air flow valve openable to only the side of liquid reservoir chamber between the filter disposed in the middle of an air changing path and the liquid reservoir chamber. SOLUTION: A liquid chamber 2 and discharge port 8 are connected by a liquid flow path comprising a vertical hole 5 and lateral hole, and an elastic valve 10 having a slit 9 formed therein is set at the discharge port 8. In addition, provided are a penetration hole communicating with the exterior part, and a porous substance filter 13 in the middle of an inner hole 11 pierced through the liquid chamber 2 by its lower end, and further an air flow valve 15 openable to only the direction of the liquid chamber 2 at the lower part thereof. When the bottle main body 1 is compressed, liquid is discharged from the slit 9 of the elastic valve 10; however, the air flow valve 15 does not open upward, and liquid never contacts with the filter 13. Upon releasing compression to the bottle main body in this instance, air is filtrated by the filter 13 with ease to thereby flow in the liquid chamber 2. |
