Owen Mumford

An injection device for delivering a fluid from a syringe having a needle, the device comprising: a casing; a syringe carrier located within a proximal end of the casing for receiving a syringe and being movable along a longitudinal axis of the device between a stowed position and a needle insertion position; a drive assembly located within a distal end of the casing and being movable along said longitudinal axis by an insertion driver in order to move said syringe carrier and a loaded syringe from said stowed position to said needle insertion position, the drive assembly comprising: an insertion tube having a proximal end abutting said syringe carrier or a loaded syringe, a firing cartridge comprising a plunger, a reaction assembly releasably coupled to the plunger, and a delivery driver coupled between the plunger and the reaction assembly, the device further comprising a clip located within a proximal end of the insertion tube and being in a partially compressed state, the plunger being configured to push the clip out of the proximal end of the insertion tube at or close to an end of travel of the plunger, thereby allowing the clip to expand against an inner surface of the casing or a component coupled to the casing to produce an audible click.

An injection device for receiving a syringe therein and for delivering a dose of medicament from the syringe, the injection device comprising: a driver mechanism retainable in a primed state and releasable from the primed state for driving one or more features of the injection device forwards, a trigger mechanism comprising a ramped surface engaged with the driver mechanism to retain the driver mechanism in the primed state, the trigger mechanism being configured on actuation thereof to withdraw the ramped surface from engagement with the driver mechanism for release thereof, wherein the trigger mechanism comprises a rotatable collar, which comprises the ramped surface, and wherein actuation of the trigger mechanism comprises rotation of the collar, wherein the trigger mechanism is configured to translate a linear actuation force into rotation of the collar, wherein the trigger mechanism comprises a trigger lug configured to engage with a ramped section of a trigger track on the collar for rotating the collar.

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