PROBLEM TO BE SOLVED: To provide a medicine ejection device capable of stabilizing an amount of a medicine ejected into an air flow path of a mouthpiece and appropriately managing the administration amount of the medicine to a user.SOLUTION: The medicine in a tank is supplied through a connection tube 8b to an ejection head 8a for ejecting a medicine into the flow path 20 of the mouthpiece 4. A remaining amount of the medicine in the tank is measured at every inhalation time with the use of a strain gauge 37 to compensate for a decrease of an amount to be inhaled due to the deposition of the medicine in a nozzle (orifice) of the ejection head, and a predetermined amount of the medicine ejected is retained by adjusting an ejecting operation duration of the ejection head when the user inhales the medicine next time.COPYRIGHT: (C)2008,JPO&INPIT【課題】利用者がマウスピースから吸入する薬剤量を一定にする。【解決手段】マウスピース4の気流路20内に薬剤を吐出する吐出ヘッド8aには、連結管8bを介してタンク7内の薬剤が供給される。吐出ヘッドのノズル(オリフィス)に薬剤が付着して吸入量が減少するのを補うために、吸入ごとにタンク内の薬剤の残量を歪ゲージ37を用いて計測し、次回の吸入時における吐出ヘッドの吐出動作期間を調整して所定の薬剤吐出量を維持する。【選択図】図5
