Injection device for delivering a drug

Abstract

The present disclosure provides an injection device for delivering a drug, extending generally along a longitudinal axis, and having a proximal end configured to point towards a dose delivery site and a distal end pointing away from the dose delivery site. The injection device includes a drug container comprising a barrel and a plunger axially movable inside the barrel, and a safety device. The safety device includes a housing, a drug container holder holding the drug container in the housing, and a needle assembly attached to a proximal end of the drug container holder and comprising a needle. The safety device further includes a manually actuatable plunger assembly comprising a plunger rod capable of proximally pushing the plunger for expelling a dose of the drug through the needle. The safety device further includes a biasing member capable, when released, of moving the needle assembly and the drug container holder from an end of injection position where the needle extends partially out of a proximal part of the housing, to a final retracted lock-out position where the needle extends fully inside the housing. The safety device further includes cooperating elements of the housing and the drug container holder is capable, when engaged, of retaining the drug container holder in the end of injection position, and when disengaged, of releasing the biasing member. The safety device further includes a sheath lock having a leg extending radially between the drug container holder and the housing. and capable, in an end of injection position of the sheath lock, of disengaging the cooperating elements.

Dependencies are inferred from the claim text.