AN AUTO-INJECTOR FOR EPINEPHRINE INJECTION

摘要

A reloadable auto injector for epinephrine injection isprovided. The reloadable auto injector has a separate needle insertion andmedicine injection drivers (1600) wherein needle insertion driver (1200) isconfigured to be re-activated upon reloading. A syringe is movablypositioned in a housing between a first position in which the needle isaccommodated inside the housing and a second position in which the needleprotrudes outside the housing. A plunger rod (1500) is normally locked to aplunger rod tube (1100) by at least one deflectable locking member (1110).A syringe driver (1200) applies a force to the syringe to move the syringetogether with plunger rod tube, plunger rod and plunger rod driver from thefirst position to the second position. In the second position, the lockingmember (1110) is unlocked and releases the plunger rod to thereby activatethe plunger rod driver to advance the plunger rod in the syringe fordelivering of medicament. A reload handle (1400) is connected to the syringeassembly so that user operation of the reload handle retracts the syringe tothefirst position and simultaneously reload the syringe driver to thereby readythe auto injector for delivering a further dose of medicament.