| 摘要 |
A safety syringe with a retractable needle has a syringe body, a needle hub, a bolt and a plunger. The syringe body has a through hole. The needle hub is mounted in the syringe body and has a base. The base has a rear end, a front recess and a first connector. The first connector is formed in the rear end. The bolt with a cutout is mounted in the through hole and the front recess. The plunger is movably mounted in the syringe body and has a front plate and a base. The base is formed on the front plate and has a second connector. After the second connector is engaged with the first connector, the needle hub can be pushed forward to break the cutout. Then the plunger is pulled to allow the needle hub to be retracted into the syringe body.
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