Syringe.

摘要

A syringe having a barrel (1) fitted with a plunger (2) and a nozzle (10) in which the barrel (1) comprises a hollow cylindrical portion (3) and a tubular portion (8) which is thinner than the cylindrical portion (3) and connected to one end of the cylindrical portion (3), the other end of said cylindrical portion (3) is an open end (5), and at least a part of the cylindrical portion (3) adjacent to the open end (5) has a diameter larger than that of one end of the plunger (2) to be inserted in the barrel (1) so that air present between the end of the plunger (2) and the top surface of a medicament in the barrel (1) can vent through the enlarged diameter part when the plunger (2) is pushed into the barrel (1).