Blister advancement mechanism comprising an actuator plate

A dry powder inhaler device comprising a body, a trigger moving on an axial/linear direction in the body, a main drum into which a blister strip having drug-carrying cavities is placed, a gear set, wherein the gear set enables a drug in the next cavity of the blister strip to be administered by rotating the main drum and around which a protective layer or cover of the blister strip is wound, and additional gears in connection with the main drum and around which a main layer of the blister strip is wound, said device further comprising

• an actuator plate having a first end connected to the trigger and a second end comprising a socket with a size sufficiently large to receive a transmission wheel therein,
• a series of teeth which are aligned in the socket of the actuator plate on the axial/linear direction in which the trigger is moved, and
• a transmission wheel connected to the teeth provided in the socket for converting the axial/linear motion of the trigger into a rotational motion of the transmission wheel and transferring this rotational motion to the main drum,
• wherein the main drum is disposed on and substantially coaxially with the transmission wheel, wherein the transmission wheel meshes with the series of teeth aligned in the socket of the actuator plate.