Patent ID: 7918617

Claim:
A vane driving device comprising: a board having an opening; at least one blade changing an area of the opening, having a cam slot, and being elastically deformable; and a drive member transmitting a drive force from a drive source to the blade, and having at least one drive pin engaging the cam slot, wherein the driving of the drive member is stopped by contacting the drive pin with one of end portions of the cam slot when the blade is located in a fully opened state or in a small aperture state, wherein the blade is movable into and out of contact with a gear transmitting the drive force from the drive source to the drive member, and stops the rotation of the gear by contacting the gear, and wherein the blade is in contact with the gear at the same time when the drive pin contacts the one of end portions of the cam slot, when the blade is located in the fully opened state or in the small aperture state.