Abstract: A reloadable auto injector includes a syringe with a needle movably positioned in a housing between a first position with the needle inside the housing and a second position with the needle protruding outside the housing. A plunger rod advances in the syringe for delivering a dose of medicament. A plunger rod tube having deflectable locking members interacts with a plunger rod stop to lock the plunger rod. A syringe driver moves the syringe from the first position to the second position. The syringe driver advances the plunger rod tube with the plunger rod to the second position. A plunger rod driver advances the plunger rod in the syringe for delivering a dose of medicament upon unlocking each of the deflectable locking members. A reload mechanism retracts the syringe from the second position to the first position and reloads for repeated activation of the syringe driver.

Abstract: Disclosed herein is an auto injector assembly comprising an auto injector for dose injection of medicament and a protective casing covering the auto injector, the auto injector having a recap prevention cap with one or more recap prevention springs and a housing partly protruding through the recap prevention cap. The housing is for accommodation of a syringe with a needle, a plunger rod, a plunger rod, a syringe driver, and a plunger rod driver.