US Patent 11117438 Door actuating device

A door actuating device includes a plurality of doors disposed in a flow channel for adjusting a degree of opening of the flow channel defined in an air conditioner case, the doors having respective door drive shafts, and a link unit actuating at least two of the doors. The link unit includes an actuator, a plate-like base member having two surfaces, a link mechanism having a plurality of levers mounted on at least either one of the two surfaces of the base member, and a rack member movably disposed on the base member and movable by a drive force transmitted from the actuator.