Patent ID: 8801674

Claim:
An autoinjector, comprising: front ( 10 ) and rear ( 12 ) separable housing portions connectable and disconnectable by a coupling action, the rear housing portion containing a drive mechanism ( 54 ), and the front housing portion being adapted in use to receive a syringe having a needle, the front housing portion including a needle shield portion movable between an extended position in which the needle shield shields the needle of the syringe in use, and a retracted position in which the needle of the syringe is exposed; and a locking arrangement configured to lock said needle shield against retraction movement and which is locked and unlocked automatically during or as a result of the coupling action and reversal thereof as the housing portions are connected and disconnected, such that the needle shield is unlocked in an unlocked mode when said front and rear housing portions are connected to each other and locked in a locked mode when said housing portions are disconnected.