Disclosed is an inverted constant-volume injection mechanism using an actuator which comprises a valve member (5), a movable member (6), a pressing-on operation member (7), and a pressing operation lever (8). On the basis of an operation by a user to hold a container main body and press the pressing-on operation member (7) onto the scalp (13) or a pressing operation by the pressing operation lever (8), first, output valves (5a, 7d) of the actuator art closed and a flow-in valve (4b) of a stem (4) is opened so that the content in the container main body flows into a constant amount chamber (A) defined between the flow-in valve (4b) to the output valves (5a, 7d). On the basis of a releasing operation performed thereafter, the stem (4) returns to a static mode position and the flow-in valve (4b) is closed, so that the content in the constant amount chamber (A) passes through the output valves (5a, 7d) which are opened by the effect of the liquefied gas, and is injected to the external space through a hole (7c) of the pressing-on operation member (7).
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机译：公开了一种使用致动器的倒定量注射机构，该致动器包括阀构件（ 5 ），可动构件（ 6 ），压入操作构件（< B> 7 ）和按下操作杆（ 8 ）。根据使用者握住容器主体并将按压操作构件（ 7 ）按压到头皮（ 13 ）上的操作或按压操作通过按下操作杆（ 8 ），首先，输出阀（ 5 a， 7 d关闭执行机构的并打开阀杆（ 4 ）的流入阀（ 4 b ），以便容器主体中的内容物流入到流入阀（ 4 b ）与输出阀（ 5 a， 7 d ）。在此后执行的释放操作的基础上，阀杆（ 4 ）返回到静态模式位置，流入阀（ 4 b ）关闭，以使恒量腔（A）中的内容物通过输出阀（ 5 a， 7 d ）通过液化气的作用而打开，并通过挤压的孔（ 7 c ）注入到外部空间，在操作成员（ 7 ）上。
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