Holder with Safety Shield for a Drug Delivery Device

An injection device comprising:

• a drug delivery device comprising:
• a body having a reservoir for containing a fluid, said body having a distal port through which the fluid may exit, said body further having a proximal port;
• a pusher including a pusher cap having a cap wall, a pusher stem connected in coaxial relation to said pusher cap and a stopper provided at an end of said pusher stem, said stopper being movable in said reservoir in a proximal to distal direction over a length defining an injection stroke;
• and
• a needle cannula provided on said body and in fluid communication with said reservoir through said distal port such that fluid within said reservoir can flow distally through said needle cannula and exit therefrom;
• and
• a holder comprising:
• a housing having a longitudinal housing cavity;
• a safety shield coaxially supported in said housing cavity, said safety shield being biased toward an extended position and being longitudinally displaceable relative to said housing from a retracted position to the extended position, in which said needle cannula is contained within said safety shield, said safety shield further comprising a shield latch deflectable between ready and released positions, said shield latch engaging said housing when said shield latch is in said ready position to hold said safety shield in said retracted position;
• and
• a retainer ring comprising a ring body coaxially supported around said body, said retainer ring further comprising a ring lever connected to said ring body for radially inward deflection between ready and released positions;
• said cap wall being insertable between said housing and retainer ring wherein insertion of the cap wall between the housing and retainer ring and in contact with the ring lever enables an inward radial deflection of said ring lever to said released position thereof resulting in deflection of said shield latch to said released position thereof resulting in said shield latch disengaging from said housing and movement of said safety shield toward said extended position.