| 摘要 |
A metered dispensing pump device preventable of water permeation is disclosed and is comprised of a liquid discharging cover, a cap, a liquid storing pipe, a liquid suction valve, a bottle cap, a spring, a valve film and a pipe-like seat. Wherein, the cap is screwed in and locked onto the pipe-like seat. One end of the liquid storing pipe is extended through the cap to connect with the liquid discharging cover, and the other end thereof is connected with the liquid suction valve. The liquid suction valve is loaded with the spring to firmly press the valve film onto the pipe-like seat; thus the metered dispensing pump device is constructed which is locked onto a bottle mouth. When the liquid discharging cover is pressed down, the liquid in the bottle can be easily drawn out of the bottle. By a specific peripheral wall of the liquid storing pipe together with the fact that a tapered pipe of the cap being higher than the cap tightly prevents permeation of water, bathing water can be prevented from permeating into the bottle. Thereby the liquid in the bottle can be protected from pollution of the bathing water.
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