Drug delivery device and related methods

Abstract

A drug delivery device may include a housing having a distal end, a proximal end, and an opening adjacent to the distal end, a flange protruding radially inward from an inner surface of the housing, a drug storage container including a delivery member having an insertion end configured to extend at least partially through the opening, a plunger moveable in a distal direction to expel a drug from the drug storage container through the delivery member, a guard moveably positioned adjacent to the opening, a guard extension positioned proximal to the guard and operably coupled to the guard, a releaser member operably coupled to the guard extension, the releaser member having a distally facing contact surface, and a first biasing member disposed between the flange of the housing and the distally facing contact surface of the releaser member. The first biasing member may be configured to bias the releaser member in a proximal direction in at least a pre-delivery state.

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