Patent ID: 7410310

Claim:
A blade driving apparatus for cameras, comprising: a base plate having an aperture for a photographing optical path; a cover plate having the aperture for the photographing optical path, provided with a blade chamber formed between the base plate and the cover plate; at least one blade rotatably mounted to the base plate in the blade chamber; and at least one electromagnetic driving source configured to drive the blade, the electromagnetic driving source including: a rotor magnetized to have a plurality of magnetic poles at preset angles on a peripheral surface and having a driving pin for driving the blade by rotation thereof; a yoke having a plurality of magnetic pole sections opposite to the peripheral surface of the rotor; and a coil wound through the yoke, at least, the rotor and the yoke of the electromagnetic driving source being interposed between the base plate and the cover plate, the rotor being rotatably mounted to the base plate.