Automatic Injection Device with a Top Release Mechanism

摘要

The present invention relates to a handheld mechanical injection device by which set doses of a liquid medicament can be injected from a medical reservoir. The medicament is expelled through an injection needle by release of a power reservoir in the device, the power reservoir being fully or partially released by actuation of a user operable release member being positioned at or near an upper end of the injection device, the upper end being that end of the injection device which is opposite the injection needle.

主权项

1. A handheld injection device, comprising:
a rotatable dose setting member that is rotatable about a longitudinal axis of a housing of the injection device, a power reservoir comprising a torsion spring for storing energy to expel a dose of medication from the injection device, a release member, the injection device further comprising a rotatably arranged multi-component driver (36, 37, 38) having at least a part (38) adapted to drive a piston rod, and a further part (36) being axial movable into a position disconnected from the housing releasing the energy accumulated in the power reservoir, the further part (36) being axially movable by the user applying a force onto a generally planar surface of the release member, wherein the release member is located at the most proximal portion of the proximal end of the injection device.