| 摘要 |
There is provided an injector having a gasket held in excellent intimate contact with an inner wall surface of a barrel and shortened in overall length. A gasket is joined to a mount base disposed on a tip end of a plunger and having a bendable portion which bends toward an axis of the plunger radially outwardly of the mount base. The gasket is joined to the mount base with a gap left for allowing the bendable portion to bend toward the tip end of the plunger when the gasket slides toward an injection needle. The gasket is made of a synthetic resin having an A-scale Shore hardness in the range from 20 to 70. The gasket has a groove define therein radially outwardly of the mount base, and the bendable portion comprises a portion of the gasket disposed radially outwardly of the groove.
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