| 摘要 |
<p>In a pump mechanism attached to a container to fill a liquid and eject the liquid from the container, the pump mechanism includes: a cylinder having a liquid introduction port; a piston which is displaceable in the cylinder; an ejection guide path for the liquid, the path being communicated with the space in the cylinder, the liquid stored in the cylinder being ejected via the ejection guide path by a pushing force which causes the piston to be displaced from the original position to a displaced position; and a recovery device for restoring the piston from the displaced position to the original position by a gas pressure and storing the liquid in the cylinder when the pushing force is released. The pushing force causes the space in the piston to enter a substantially vacuum state, and the gas pressure is generated by a pressure difference between the internal pressure of the space and atmospheric pressure acting via the liquid on the piston. With the pump mechanism, when it is to be subjected to a disposal process or a recycle process, it is not required to conduct selection according to the material and which can be therefore subjected to such a process at a low cost. <IMAGE></p> |
