| 摘要 |
The present invention relates to injection devices for injecting a medicament from a cartridge (600) through a needle cannula (510). The injection device (100) includes an actuator (330, 360) for driving a piston driver (310) and includes an end of stroke limiter (341, 611). When the piston driver (310) is arrested by the end of stroke limiter (341, 611) a shielding driver (370) is automatically triggered to actively shift the needle cannula (510) into a shielded state. The injection device may include a fluid dispensing interruption mechanism that automatically interrupts fluid flow when the piston driver has moved a predetermined stroke length. The injection device may also include a single pre-stressed spring acting exclusively in a linear compression mode or exclusively in a torsion mode and adapted to sequentially drive the device to enable fully automatic operation. The invention also relates to a method of sterilizing a needle cannula assembly. |
