Assembly for a drug delivery device

An assembly for a drug delivery device, comprising an actuator which is configured to perform a setting movement in a proximal direction in order to set a dose of a drug, and which is configured to perform a dispense movement in a distal direction in order to dispense a dose of a drug, and comprising a stop mechanism acting after a maximum amount of a drug has been delivered, and which is configured to axially constrain the setting movement of the actuator such that the setting of a dose is inhibited, wherein, after the maximum amount of the drug has been delivered, a limited axial movement of the actuator is allowed before a stop element of the stop mechanism abuts a last dose stop to axially constrain the setting movement;

• wherein the assembly further comprises a spring mechanism which is configured such that it biases the actuator in the distal direction after the actuator has performed the limited axial movement in the proximal direction;
• a piston rod configured to rotate and axially move in a distal direction during the dispensing of a dose;
• and a drive member coupled to the actuator, wherein the drive member comprises a ramp feature on an outer surface of the drive member, wherein the spring mechanism is configured to, during the limited axial movement, slide along and act on a proximal ramp surface of the ramp feature without reaching a top point of the ramp feature, thereby causing the spring mechanism to exert a force on the proximal ramp surface, so as to bias the ramp feature, the drive member, and the actuator in the distal direction.