A transfer lock assembly for a drug delivery device, the transfer lock assembly having a locking member (50, 50', 50") configured to interact with a control member (60). The locking member (50, 50′, 50″) is provided on the control member (60) from a first state where the control member (60) is fixed to a second state where the control member (60) freely moves. Movable relative to the transfer lock assembly further comprises a housing portion (20) having a key member (22), the assembly of the power pack (30) with the housing portion (20) including the key member (22). , The locking members (50, 50', 50") are moved from the first state to the second state.薬剤送達装置のための移送ロックアセンブリであって、移送ロックアセンブリは、制御部材(60)と相互作用するように構成されたロック部材(50,50’,50”)を有するパワーパック(30)を備え、ロック部材(50,50’,50”)は、制御部材(60)が固定される第1状態から、制御部材(60)が自由に動く第2状態まで、制御部材(60)に対して移動可能であり、移送ロックアセンブリはさらに、鍵部材(22)を有するハウジング部(20)を備え、パワーパック(30)のハウジング部(20)との組立ては、鍵部材(22)が、ロック部材(50,50’,50”)を第1状態から第2状態まで移動させる。