| 摘要 |
<p>The present invention is a fixed-quantity injection mechanism that uses an actuator comprising a stem connection member (5) an intermediate mobile member (6), and a fixed-quantity-chamber adjustment member (7). On the basis of an injection operation, by means of first the output valve of the actuator closing and the inflow valve of the stem (4) becoming open, vessel body contents flow into a fixed-quantity chamber (A) from the inflow valve to the output valve, and then the stem (4) returns to a still mode position, closing the inflow valve, and the contents of the fixed-quantity chamber (A) are injected to an outside space through the opened output valve by means of the action of liquefied gas or the like. The capacity of the fixed-quantity chamber (A) changes by means of a rotation operation of the fixed-quantity-chamber adjustment member (7) that is screw-coupled to the intermediate mobile member (6). The inflow valve comprises a stem gasket and a horizontal hole section (4b) of the stem (4), and the output valve comprises a frustroconical section (5a) of the stem connection member (5) and an annular protrusion section (6c) of the intermediate mobile member (6). The volume of the fixed-quantity chamber is at a maximum in the state illustrated in the drawing, and becomes smaller as the fixed-quantity-chamber adjustment member (7) is moved downwards.</p> |
