| 摘要 |
The present invention provides a retractable safety syringe, which comprises a barrel (10), a sleeve (40), a connector (30), a plunger (20) and a standard needle. The barrel has the sleeve fitted at the front end. The connector is fitted in the sleeve and connected to the standard needle. The plunger is fitted in the rear lumen of the barrel for delivering fluid and retracting the connector with the standard needle into the barrel. The sleeve has threads on its inner surface. The connector is formed integrally by a cone-shaped cylinder and a tub-body, wherein the tub-body can be engaged with the plunger so as to retract the standard needle with the connector into the barrel by pulling the plunger. In the present invention, the barrel, the sleeve and the connector are separated.
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