| abstract |
A communication section (9) has a piercing needle (8) capable of piercing through a piercing section (11) of a solute container (10) storing therein a solute such as a drug, and a closing section (7) which is separable inside a storage chamber (2) storing therein a solvent. The communication section (9) is disposed between the solute container and the storage chamber, and a bellows-like guide cover (12) covers the piercing needle. Accordingly, the piercing needle is positively kept separated from the piercing section when not in use and the guide cover undergoes plastic deformation under an external force exceeding a predetermined value when in use, thereby permitting the piercing operation to be initiated and then maintained. Due to the subsequent separation of the closing section, the solute and the solvent are mixed through the communication section and sterile dissolution can be ensured. |