| 摘要 |
A safety syringe (100; 700; 1200) comprising: a barrel (104; 704; 1204) having an opening at an end thereof; a syringe plunger (108; 708; 1208) configured to move within the barrel such that an inward stroke of the syringe plunger causes a substance within the barrel to be expelled from the opening; a safety plunger which is coupled to the syringe plunger and a sheath (112; 712; 1212) configured to cover at least partially the opening in the barrel after use of the syringe, wherein the safety plunger couples to the sheath at a first point in the inward stroke of the syringe plunger and safety plunger is configured to decouple from the syringe plunger at a point on the inward stroke such that the sheath is moveable independently of the syringe plunger and further movement of the safety plunger after decoupling causes the sheath to at least partially cover the opening in the barrel. |
