| 摘要 |
A syringe (1) includes a hollow needle (2) preliminarily held in a rigid blocking disk (4) embedded in a rear disk socket (135) perpendicularly formed in a flexible plug (13) inserted in a front portion of the syringe (1) for injection use having a needle head portion (23) formed on a rear portion of the needle (2), and a plunger (31) slidably held in the syringe (1) for boosting a liquid medicine in the syringe (1) to be injected into a patient through the hollow needle (2) having a needle-head socket (32) recessed in the plunger (31) to be engageable with the needle-head portion (23) for pushing the needle head portion (23) of the needle (2) frontwardly to drive the rigid blocking disk (4) frontwardly to engage the blocking disk (4) into a front disk socket (137) which is normally inclinedly formed in the flexible plug (13) and will be operatively perpendicularly biased in the plug (13) when approximately exhausting the liquid in the syringe (1) and finishing the injection, whereby upon a retraction of the plunger (31) and the needle (2) with the needle head portion (23) received in and coupled to the plunger (31) into the syringe (1) to disengage the needle (2) from the rigid disk (4), the flexible plug (13) will restore the front socket (137) and the rigid disk (4) embedded in the front socket (137) to be inclinedly positioned in the plug (13), thereby blocking an outward protruding of the needle (2) retracted in the syringe (1) for preventing its injury or infectious contamination to the surroundings. <IMAGE> |
