Novo Nordisk A/S
AUTOINJECTION DEVICE HAVING A MEMORY ELEMENT

Abstract:

An autoinjection device (10) for expelling a dose of drug from a held drug container (100) is described. A plunger (500) is drivable by an energy source (550) for expelling a dose, the plunger (500) comprising a retaining geometry (515) in retaining engagement with a retaining element (410, 415), wherein the autoinjection device (10) defines a trigger element (700) serving as a memory element movable from a pre-firing position to a fired position, the memory element comprising an engagement surface (700c) configured for sliding engagement with an activation surface (415c) of the retaining element (410, 415), wherein at least one of the engagement surface (700c) and the activation surface (415c) includes a surface being inclined relative to said radial direction, and wherein the energy source (550) acts on the plunger (500) to force the retaining element (410, 415) radially to release the retaining engagement, the radial movement of the retaining element (410, 415) in turn forcing the memory element to move into the fired position.