The utility model system is the air-valve assembly and a gas cylinder by the export of misty medicament for using for entering dsah-pot fog-like including medicament, controlling misty medicament one-way flow in relation to a kind of suction medicine auxiliary device. Air-valve assembly includes locating piece, elastic valve plate and limited part. Locating piece has hollow-out parts and notch. Elastic valve plate has diaphragm and mounting, respectively to control the one-way flow for flowing to the mist medicament of gas cylinder through hollow-out parts from dsah-pot, and the one-way flow of air-flow of the control from gas cylinder through notch to the external world. Limited part two sides of difference clipping what elastic valve plate in conjunction with locating piece, and the base portion of what mounting is suppressed, to increase mounting to the impedance strength flowed in what external air flow, external air flow is avoided to enter gas cylinder from notch.本新型係有關一種吸藥輔助裝置，其係包括供藥劑進入呈霧狀的緩衝筒、控制霧狀藥劑單向流通的氣閥組件及一將霧狀藥劑導出以供使用的導氣筒。氣閥組件包括定位件、彈性閥片及限制件。定位件具有鏤空部及缺口。彈性閥片具有膜片及封片，分別用以控制自緩衝筒經鏤空部流至導氣筒之霧狀藥劑的單向流通，及控制自導氣筒經缺口至外界之氣流的單向流通。限制件與定位件結合而分別夾制於彈性閥片的兩面，並壓制於封片的基部，以增加封片對於外界氣流內流的阻抗強度，避免外界氣流自缺口進入導氣筒。
