| 摘要 |
A safety hypodermic syringe is disclosed to include a barrel, which has a front connector with a breakable connection portion connected to the peripheral wall of the barrel, a needle assembly connected to the front connector, a flexible stopper fitting the inner diameter of the barrel, a plunger, which has a stopper holder that holds the flexible stopper and a barbed retaining flange disposed at the front side for engaging two hollow retaining wings of the front connector when the plunger is pushed further forward after the service of the safety hypodermic syringe such that the front connector is separated from the barrel and received with the needle assembly to the inside of the barrel upon a return stroke of the plunger.
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