| 摘要 |
The fluid-dispensing pump 1 has an extendable/retractable member 10 , an inflow valve mechanism 14 connected to the lower end of the extendable/retractable member 10 , and an outflow valve mechanism 15 connected to the upper part of the extendable/retractable member 10 . The outflow valve mechanism 15 includes a valve seat member 151 comprising a first valve seat portion 151 a at the bottom of which an opening portion is formed and a second valve seat portion 151 b which is located at the upper part of the first valve seat portion 151 a and has a nearly cylindrical inner wall, a first valve member 152 configured to close the opening portion in the first valve seat portion 151 a, and a second valve member 153 configured to contact the inner wall in the second valve seat portion 151 b.
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