Automatic injection device

摘要

An injection device for injecting a fluid into an object, the injection device including a plunger assembly for operative engagement with a syringe adapted to contain the fluid and permit ejection of the fluid therefrom via a syringe outlet, the plunger assembly being displaceable in a first direction which causes at least some of the fluid contained in the syringe to be ejected from the syringe via the syringe outlet and an inadvertent fluid ejection prevention assembly coupled to the plunger assembly for preventing ejection of fluid from the syringe in situations where the syringe outlet is neither in operative engagement with a vial adaptor suitable for providing fluid communication with the interior of a vial nor in fluid communication with an injection site within the object.

主权项

1. An automatic injection device for injecting a fluid into an object, said automatic injection device comprising:
a plunger assembly for operative engagement with a syringe adapted to contain said fluid and permit ejection of said fluid therefrom via a syringe outlet, said plunger assembly being displaceable relative to said syringe in a first direction which causes at least some of said fluid contained in said syringe to be ejected from said syringe via said syringe outlet; a vial adaptor engagement assembly adapted for engagement with a vial adaptor, said vial adaptor engagement assembly comprising a needle guard; and a user operable actuator button which, when displaced in a button displacement direction, is operable to cause displacement of said plunger assembly relative to said syringe in said first direction, said user operable actuator button being mechanically locked against displacement in said button displacement direction by said vial adaptor preventing access to said needle guard at all times that said syringe outlet is in operative engagement with said vial adaptor.