PROBLEM TO BE SOLVED: To make it possible to check whether a predetermined amount of liquid medicine has accumulated.SOLUTION: A liquid medicine injection device (11) comprises: a storage part (46) which inflates as a liquid medicine inflows from a container (2) and is deflatable when the liquid medicine outflows a housing (21) for accommodating the storage part (46) and operation members (71+81) which contact the storage part (46) and are movably supported by the housing (21). In the liquid medicine injection device, when the operation members (71+81) are pressed, the operation members (71+81) move to a second position, which is depressed lower as compared with a first position, and the storage part (46) is pressed and deflates, so that the liquid medicine in the storage part is injected into a subject person. The operation members (71+81) moved to the second position move to the first position as the liquid medicine inflows from the container (2) to the storage part (46) to inflate the storage part, and no energization member is provided to press the operation members (71+81) toward the first position.COPYRIGHT: (C)2015,JPO&INPIT【課題】所定量の薬液が溜まっているかどうか確認可能にすること。【解決手段】容器(2)からの薬液が流入するに連れて膨張すると共に、薬液が流出した場合に収縮可能な貯留部(46)と、貯留部(46)を収容する筐体(21)と、貯留部(46)に接触し且つ筐体(21)に移動可能に支持された操作部材(71+81)と、を備え、操作部材(71+81)が押された場合に、操作部材(71+81)が、第1の位置に比べて押し下げられた第2の位置に移動して、貯留部(46)が押されて収縮して、貯留部の薬液が対象者に注入され、第2の位置に移動した操作部材(71+81)は、容器(2)から薬液が貯留部(46)に流入して膨張することに伴って第1の位置に移動し、且つ、操作部材(71+81)を第1の位置に向けて押す付勢部材が設けられていない薬液注入装置(11)。【選択図】図2
