An injection device (110) is provided which includes a syringe (122) having adischarge nozzle (118). The syringe is movable between a retracted position inwhich the discharge nozzle is contained within the housing and an extendedposition in which the discharge nozzle extends from the housing. A trigger(114) is activatable to allow the contents of the syringe to be dischargedthrough the discharge nozzle. There is also a releasable locking mechanism(116) which, when engaged, prevents the trigger from moving into an activeposition. The trigger includes a first portion (150) having a cut-out (152)which extends from a first end of the trigger in a direction substantiallyparallel to the first axis (101). The releasable locking mechanism includes aprotrusion (154) along a second axis (181) for communicating with the firstportion of the trigger when the releasable locking mechanism is engaged andfor communicating with the cut-out when the releasable locking mechanism isdisengaged. Such an injection device provides improved protection againstaccidental activation of the trigger.
