| 摘要 |
A locking mechanism (10) for a medical sharp device such as a syringe assembly (62) includes a retainer part (12) for retaining a hypodermic needle (22), and a connector part (14). The retainer part includes lugs (46) for engagement with a recess (82) formed in a neck (70) of the syringe assembly. When a plunger (72) of the syringe assembly is pushed fully forwards, the lugs (56) of the retainer part (12) engage behind a ledge (54) of the connector part (14) and the lugs (46) disengage from the recess (82). The plunger (72) may then be retracted, pulling the needle (22) into the barrel (64) of the assembly. The neck portion may be eccentrically mounted on the barrel and means (116, 118) may be provided for preventing rotation of the plunger (72) in the barrel (64). |
