| 摘要 |
An automatic disposable needle guard for a hypodermic syringe and needle which has a sleeve (32) which slides over the needle and is limited in the travel in one direction by a sleeve lanyard (38). A guard (40) is positioned slidably upon the needle with a guard lanyard (52) limiting its travel from the syringe. An expanding flexible shield (54) is placed between the guard and the syringe exerting an expansive force against the lanyard (52). Clipped to the guard is a spring (60). When the guard is manually pulled toward the syringe or the needle penetrates a patient's tissue beyond the exposed length of the needle, the spring (60) trips permitting the shield to expand and cover the entire needle after use. Prior to maximum expansion, the spring having a protecting end (66), releases tension on the side of the needle and slips over the sharp end protecting and retaining the needle within the guard and shield for safe disposal. |
