Plunger Rod with Dose Setting Means and Injection Device

摘要

The present invention relates to a plunger rod for an injection device, having a distal element slidingly coupled to a proximal element having at least one radially flexible branch. The plunger rod includes a lock for selectively locking the distal element and the proximal element in a plurality of relative axial positions defining a plurality of intermediate positions of the plunger rod, wherein the lock is movable from a locked state, in which the distal element and the proximal element are fixed with respect to each other in the axial direction, and an unlocked state, in which the distal element and the proximal element are displaceable in the axial direction with respect to each other, when the at least one radially flexible branch is displaced radially. The invention also relates to an injection device having such a plunger rod.

主权项

1. A plunger rod for an injection device comprising:
a distal element having a proximal end and a distal end, a proximal element having at least one radially flexible branch, wherein the proximal element is slidingly coupled to the distal element and selectively movable in an axial direction between a restricted position of the plunger rod and an extended position of the plunger rod, and a lock for selectively locking the distal element and the proximal element in a plurality of relative axial positions defining a plurality of intermediate positions of the plunger rod, wherein the lock is movable from a locked state, in which the distal element and the proximal element are fixed with respect to each other in the axial direction, and an unlocked state, in which the distal element and the proximal element are displaceable in the axial direction with respect to each other, when the at least one radially flexible branch is displaced radially.