| 摘要 |
An improved hypodermic syringe employs a syringe holder which surrounds the syringe barrel, including the needle, both before and after injection. The syringe holder encases the operable parts of the syringe prior to use. One embodiment employs a plunger having a plunger lock adapted to engage a counterlock in a rubber support, which holds the needle in place. When the plunger is fully compressed to inject the liquid, the plunger lock engages the counterlock, allowing the needle to be retracted into the syringe holder by pulling the plunger. In an alternate embodiment, a conventional one-piece plunger is used. After injection, the needle is retracted into the holder by grasping and pulling the syringe barrel.
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