PROBLEM TO BE SOLVED: To provide a medicine solution administration apparatus which is used for administering insulin into the body and is capable of administering a medicine solution appropriately and accurately.SOLUTION: When a gasket 12 is located on the most distal part 11B side and abuts a projecting part 11F, a small space is formed by the projecting part 11F between an internal surface 11C of an outer tube 11 and the gasket 12. When air bubbles are present within a medicine solution storing space 13, the air bubbles affixed to a side surface of a main part 11A moves by being pushed by the gasket 12 while the medicine solution is delivered by movement of the gasket 12. When the gasket 12 abuts the projecting part 11F, the air bubbles is pooled within the space formed between the gasket 12 and the internal surface 11C. With such a configuration, the air bubbles are prevented from being delivered outside.COPYRIGHT: (C)2013,JPO&INPIT【課題】本発明は、精度よく薬液を投与する。【解決手段】本発明は、ガスケット12が最も先端部11B側に位置して突起部11Fに当接した状態で、外筒11の内接面11Cとガスケット12との間に突起部11Fにより若干の空間が設けられるので、薬液貯蔵空間13内に気泡が存在している場合、ガスケット12が移動して薬液が送出される際に、本体部11Aの側面に付着した気泡がガスケット12により押されながら移動し、ガスケット12が突起部11Fに当接した際に、該ガスケット12と内接面11Cとの間に設けられた空間に気泡が溜まるので、外部に気泡が送出されることを防止できる。【選択図】図3
