PROBLEM TO BE SOLVED: To achieve simplification and downsizing of a structure.SOLUTION: A medicine delivery device comprises: a cylindrical body 2 having a body in which a medicine 10 is encapsulated, and a cylinder tip 5 in which a delivery hole 5a for delivering the medicine is formed a lid body 3 having an air inflow hole 6a and coupled to the cylindrical body and a sealing film 15 for closing the air inflow hole by being adhered to the lid body during non-delivery of the medicine from the delivery hole. An internal space 9, which communicates with the delivery hole and the air inflow hole and in which an expansion agent 11 and the medicine are encapsulated in a separated state, is formed by the cylindrical body and the lid body. The expansion agent is encapsulated in the internal space and made of a material containing iron as a main component. Air flows through the air inflow hole, iron oxide is generated by oxygen in the flowing air, and this causes the expansion agent to expand. Pressure is applied to the medicine due to the expansion of the expansion agent and cases the medicine to be delivered from the delivery hole. The sealing film is adhered to the lid body, thereby stopping the delivery of the medicine from the delivery hole.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】 構造の簡素化及び小型化を図る。【解決手段】 薬剤10が封入される本体と薬剤を送出する送出孔5aが形成された筒先5とを有する筒状筐体2と、空気流入孔6aを有し筒状筐体に結合された蓋体3と、薬剤の送出孔からの非送出時に蓋体に貼り付けられ空気流入孔を閉塞する封止フィルム15とを備え、筒状筐体と蓋体によって、送出孔と空気流入孔に連通され膨張剤11と薬剤が分離された状態で封入される内部空間9が形成され、膨張剤は内部空間に封入されると共に鉄を主成分とした材料から成り、空気流入孔から空気が流入され、流入された空気中の酸素により酸化鉄が生成されて膨張剤が膨張され、膨張剤の膨張によって薬剤に圧力が付与されて薬剤が送出孔から送出され、封止フィルムが蓋体に貼り付けられて薬剤の送出孔からの送出が停止される。【選択図】図1
