| 摘要 |
A hypodermic injection device comprising a cartridge holder having a cylindrical body open at one end and closed at the other end, the closed end being provided with an aperture, a cartridge including an ampoule with attached cannula within the holder, the cannula being directed toward the holder's closed end, the ampoule including a cylindrical sleeve slidably carrying a piston, the sleeve being open at one end and having a necked portion at the other end to receive a hub mounting the cannula, fluid medicament in the sleeve between the piston and cannula, a spring power assembly for moving the cartridge forward and for injecting the fluid medicament carried in the ampoule, a safety assembly for controlling actuation of the spring power assembly, and a resilient sheath covering the cannula to maintain the cannula in sterile condition. |
