Injection device with flexible dose selection

A dose setting mechanism comprising;

• a dose knob;
• a dose selector comprising a dose stop;
• a radial projecting rib positioned circumferentially on an inside surface of the dose selector and comprising a cut-out that is positioned in alignment with the dose stop that corresponds to one of a finite set of predetermined fix dose settings;
• and
• a snap element comprising a first protrusion and a second protrusion;
• wherein engagement of the second protrusion with the radial projecting rib prevents distal axial movement of the dose selector, and
• wherein the dose selector only moves in a proximal direction to start a dose delivery when the second protrusion is aligned with a cut-out in the radially projecting rib.

A dose setting mechanism comprising;

• a dose knob;
• a dose selector comprising a plurality of dose stops positioned on an inside surface of the dose selector;
• a radial projecting rib positioned circumferentially on an inside surface of the dose selector;
• and
• a snap element comprising a first protrusion and a second protrusion;
• wherein engagement of the second protrusion with the radial projecting rib prevents distal axial movement of the dose selector and where the second protrusion will abut a proximal side of the radially projecting rib if the dose knob is released during dose delivery, and
• wherein the dose selector can only move in a distal direction during dose delivery when the second protrusion is aligned with the cut-out of the radially projecting rib.