Patent ID: 9744102
Date: 2017-08-29
CPC Classifications: A61J

Claim:
1. A connection device, comprising: holding means spacing a syringe and a vial from each other or bringing said syringe and said vial close to each other; and a double-head cannula which is located between a syringe lid member attached to said syringe and a vial lid member attached to a ring member provided to said vial, and which can penetrate said syringe lid member and said vial lid member, the connection device switching from a pre-use state in which said holding means spaces said syringe and said vial from each other and said double-head cannula does not penetrate said syringe lid member and said vial lid member, to a use state in which said holding means brings said syringe and said vial close to each other and said double-head cannula penetrates said syringe lid member and said vial lid member to establish communication between internal spaces of said syringe and said vial, wherein said holding means includes said syringe holding member has an outer cylindrical portion which is opened on a retracted position side and accommodates said cannula holding member to be movable between said retracted position and said advanced position, said cannula holding member has an inner cylindrical portion which is opened on said retracted position side, is accommodated inside said outer cylindrical portion, and holds said ring member of said vial, and when said cannula holding member is in said use state, a position of an end portion of said outer cylindrical portion on said retracted position side does not protrude to the retracted position side, with respect to a position of an end portion of said inner cylindrical portion on said retracted position side.