Drug delivery device with retractable needle

Drug delivery device, comprising:

• a needle with a distal end and a proximal end, which comprises:
• an inner surface forming a channel,
• an outer surface,
• a first salient located on the outer surface,
• a second salient located on the outer surface between the proximal end and the first salient,
• a body unit having a first opening and a second opening,
• a plunger arranged such that an outer end of the plunger is positioned outside the body unit, and an inner end of the plunger is positioned within the body unit, wherein the plunger is moveable in the distal direction with respect to the body unit, and wherein the needle is arranged such that the proximal end and the first and second salient are positioned within the body unit, and
• a seal arranged within the body unit, wherein the seal contacts the outer surface of the needle such that the seal is interposed between the first and second salient thereby separating the first salient from the second salient by a distance, wherein in a first position the seal fixes the needle such that it cannot be moved relative to the body unit, wherein the inner end of the plunger is configured to push the seal to a second position where the seal releases the needle, and wherein the inner end of the plunger is configured to be engaged with the first and/or the second salient when the seal is pushed to a second position.