INJECTION DEVICE COMPRISING AN IMPROVED DELIVERY ELEMENT

摘要

The invention relates to an injection device, the delivery element (90) of which has an inner thread. Alternatively or in addition, the delivery element that is driven by rotation has a cylindrical outer wall region which is substantially smooth. Both features permit a delivery element to be designed that is less intimidating to patients than known threaded rods and facilitate easy cleaning. Preferably, the delivery element is non-rotatably guided and axially spring-loaded and can be inserted axially into the housing when the reservoir is replaced. The driving thread element (180) for the delivery element is preferably mounted in the vicinity of the distal end of the housing (20).