Reconfigurable drive assembly of drug delivery devices is today. The reconfigurable drive assembly, the piston rod is axially displaceable and is rotatable relative to the housing between a distal end position (housing 10A, 10B, 10C), the proximal starting position housing ( 20), when administering the dose, and may include (50) stop member drive member for displacing distally toward the end position and the piston rod (30). In order to form the interlocking of the lock releasable first is operable to interact with the piston rod, wherein the interlocking of the first driving member, the piston rod relative to the drive member and is operable to prevent movement of the proximal. In order to form the interlocking of the lock releasable second and is operable to interact with the piston rod, wherein the interlock of the second, relative to the housing stop member, the piston rod (20 and is operable to prevent movement of the proximal). When it is in drive mode drive assembly, proximal movement to the starting position to be prevented from the end position of the piston rod, the interlock is locked. In order switch the reset mode from the drive mode drive assembly, in order to unlock the stop member and interlocking the first piston rod and is rotatable relative to the drive member, the piston rod, the second It is rotatable relative to each other in order to unlock the interlock. When a reconfiguration mode drive assembly, proximal movement of the piston rod to the starting position to be acceptable, the interlock and a second interlock the first, is unlocked. Furthermore, the use of the spring and drug delivery device is today. [Selection Figure 11薬物送達デバイス用の再設定可能なドライブアセンブリが供される。再設定可能なドライブアセンブリは、ハウジング(ハウジング10A、10B、10C)、近位始動位置と遠位端位置の間をハウジングに対して回転可能であり、そして軸方向に変位可能であるピストンロッド(20)、用量を投与するとき、ピストンロッドを端位置に向かって遠位に変位させるための駆動部材(30)、及び停止部材(50)を含み得る。駆動部材は、ロック解除可能な第一のインターロックを形成するために、ピストンロッドと相互作用するように操作可能であり、ここで、第一のインターロックは、駆動部材に対してピストンロッドの近位の動きを阻止するように操作可能である。停止部材は、ロック解除可能な第二のインターロ
