INJECTOR FOR PRE-FILLED SYRINGE, PRE-FILLED SYRINGE, AND METHOD FOR INSPECTING CAP FITTING STATE IN PRE-FILLED SYRINGE

摘要

PROBLEM TO BE SOLVED: To provide an injector for a pre-filled syringe for easily confirming whether or not a cap is reliably screwed so as to seal a nozzle part.

SOLUTION: The injector 10 for a pre-filled syringe comprises: an outer cylinder 2 having an outer cylinder body 21 and the nozzle part 22 which is arranged at the tip end of the outer cylinder body; a cap 3 attached to the nozzle part; a gasket 4 stored in the outer cylinder 2; and a pusher 5. The nozzle part 22 includes: a chip part 24 for mounting a syringe needle, whose diameter is reduced toward the tip end; and a nozzle side screw part 25 arranged at a rear end side from the chip part 24. The cap 3 comprises: a chip storage part 49 for storing the chip part 24; a cap side screw part 50 to be screwed onto the nozzle side screw part 25; and a marker 31 for confirming a fitting state between the cap 3 and the chip part 24 where the chip part 24 is reliably sealed by the chip storage part 49.

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