Patent ID: 8317751

Claim:
An injection device comprising: a housing defining a first axis and adapted to receive a syringe having a discharge nozzle so that the syringe is movable between a retracted position in which the discharge nozzle is contained within the housing and an extended position in which the discharge nozzle extends from the housing through an exit aperture; a drive that is acted upon by a drive spring and in turn acts upon the syringe; a trigger movable from a rest position, in which it causes the drive to be retained by engaging the drive or drive spring and thereby preventing the drive spring from driving the syringe, to an active position, in which it no longer causes the drive to be so retained by disengaging from the drive or drive spring and thereby permitting the drive spring to drive the syringe via the drive, thus allowing the contents of the syringe to be discharged through the discharge nozzle; and a releasable locking mechanism movable from a first position in which the trigger is prevented from moving into its active position to a second position in which the trigger can be moved into its active position, wherein the trigger includes a first portion having a cut-out therein, the first portion extending from a first end of the trigger in a direction away from a second end of the trigger substantially parallel to the first axis; and the releasable locking mechanism includes a protrusion along a second axis for communicating with the first portion of the trigger when the releasable locking mechanism is in its first position and for communicating with the cut-out when the releasable locking mechanism is in its second position; such that when a force is applied to the trigger when the locking mechanism is in its first position, the first portion of the trigger and the protrusion both flex in such a way that the protrusion is forced away from the cut-out.