| 摘要 |
A foam pump dispenser that has a prevention function against any reverse flow is disclosed, which comprises an air guide which is engaged at a lower side of the air and liquid mixing chamber (51) of the piston cover member (50); a liquid leakage prevention spring (200) which is located between the piston cover member (50) and the piston member (70); and a liquid leakage prevention valve (300) which is covered on the upper side of the liquid compression piston (76). The foam pump dispenser with the above construction is able to prevent a leakage of liquid, and is able to obtain a reliable fixed supply of air in a pump dispenser designed to properly mix liquid such as foaming cleanser, foam hand soap, shave foam, and hair mousse, etc. with air and to pump out in a foam shape.
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