| 摘要 |
The present invention relates to a disposable safety syringe ( 1 ) including an automatically retractable needle ( 12 ) for preventing said syringe from being reused, comprising a cylindric body ( 82 ) defining, at one end thereof, a needle coupling end-piece ( 7 ) and being opened at the other end portion thereof for introducing thereinto a piston ( 4 ) having a scaling gasket ( 5 ). The feature of the invention is that on said piston are provided engaging means ( 23, 24 ) for engaging and retracting the needle ( 12 ) after the delivering of the injection liquid.
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