Safety injection device for delivering a drug

Abstract

The present disclosure provides a safety device for delivering a drug. The safety device extends generally along a longitudinal axis and has a proximal end configured to point towards a dose delivery site during use of the safety device, and a distal end pointing away from the dose delivery site. The safety device includes a drug container holder, generally cylindrical and extending along the longitudinal axis, and configured to receive and hold a drug container. The safety device further includes a ring-shaped rotator arranged around a portion of the drug container holder. The safety device further includes a manually activated plunger assembly, extending along the longitudinal axis, the plunger assembly comprising a plunger rod capable of acting on a plunger inside a barrel of the drug container for expelling a dose of the drug, and a plunger head formed on a distal end of the plunger rod and configured to be manually pushed in a proximal direction to expel the drug. The plunger head includes at least a fin extending towards the proximal end. The rotator includes an outer pocket designed to receive the fin, and the shapes of the fin and of the outer pocket are such that a movement of the plunger head towards the rotator along the longitudinal axis triggers a rotation of the rotator when the fin contacts a corner of the outer pocket.

Dependencies are inferred from the claim text.