A medicament delivery device (1) comprises a metering member (25) mounted for rotation adjacent a reservoir (22) containing a bulk quantity of medicament. The metering member (25) is adapted when at a filling position to volumetrically meter a desired dose of medicament from the reservoir (22). By rotation of the metering member (25) in a first sense said dose is transferred to a dispensing position at which the dose can be dispensed from the device (1). The metering member (25) and/or a component (90) to which the metering member (25) is operably linked is provided with formations (95) effective to prevent reverse rotation of the metering member (25) from the filling position.一藥劑輸送裝置(1),包含一計量構件(25),該計量構件(25)係安裝以供相鄰於一含有一散裝數量的藥劑之貯器(22)作旋轉。計量構件(25)係調適以當位於一充填位置時從貯器(22)容積性地計量一所欲劑量的藥劑。藉由計量構件(25)以一第一指向的旋轉,該劑量被轉移至一可從裝置(1)配送該劑量之配送位置。計量構件(25)及/或一供計量構件(25)可操作地連結之組件(90)係設有可有效防止計量構件(25)從充填位置逆向旋轉之構造(95)。21,21a‧‧‧藥劑22,22a‧‧‧貯器23,23a‧‧‧蓋24,24a‧‧‧開口25,25a‧‧‧計量構件26,26a‧‧‧截頭圓錐形凹部27,27a‧‧‧凹陷(計量杯)28‧‧‧壓縮彈簧90‧‧‧輪100,100a‧‧‧支撐構件X-X‧‧‧共同軸線
