Autoinjector

A drive mechanism for a medicament delivery device, the drive mechanism comprising:

• a needle shroud movable between a first extended position, a retracted position and a locked second extended position;
• a plunger movable from a first axial position to a second axial position;
• a drive spring arranged in the plunger, the drive spring configured to bias the plunger toward the second axial position;
• and
• a collar coupled to the needle shroud,
• wherein the needle shroud is configured to move to the first extended position when the needle shroud is moved to the retracted position to advance the plunger to the second axial position,
• wherein, in the second axial position, a portion of the plunger is arranged within the medicament container.

An autoinjector comprising:

• a case including a rib;
• a needle shroud telescopically coupled to the case and movable between a first extended position, a retracted position and a locked second extended position;
• a carrier arranged in the case and adapted to hold a medicament container;
• a plunger slidably coupled to the carrier, wherein the plunger is arranged to abut a stopper within the medicament container;
• a drive spring arranged in the plunger, the drive spring biasing the plunger relative to the carrier, wherein the plunger is movable from a first axial position to a second axial position relative to the case;
• and
• a collar slidably disposed in the case, the collar coupled to the needle shroud,
• wherein the needle shroud is configured to move to the first extended position when the needle shroud is moved to the retracted position to advance the plunger to the second axial position.