Patent ID: 7922403
Filing Date: 2011-04-12
Classification: G03B

Abstract:
1. A blade driving apparatus for a camera, comprising: a base plate having an aperture section for a photographing optical path; a partition plate having an aperture section for the photographing optical path configured such that an exposure aperture is restricted by at least one of the aperture section of the base plate and the partition plate, mounted to one surface of the base plate so that a blade chamber is defined between the base plate and the partition plate; a cover frame at a side area of the exposure aperture, mounted to the base plate so that the partition plate is positioned between the base plate and the cover frame, having an actuator chamber between the partition plate and the cover frame; a permanent magnet rotor positioned in the actuator chamber and rotatably mounted to a shank of the rotor arranged on the cover frame so that an output pin integrally rotated is introduced into the blade chamber; a yoke shaped like a letter “U” in which tops of two legs constructed as magnetic pole sections are positioned opposite to a peripheral surface of the rotor in the actuator chamber and one of the two legs is fitted into a bobbin around which a coil is wound; and at least one blade placed in the blade chamber, rotatably mounted to a shank for at least one blade which is arranged on the cover frame so as to be introduced into the blade chamber, and configured so as to be introduced into, and removed from, the exposure aperture by the output pin.