Patent ID: 6394668
Filing Date: 2002-05-28
Classification: G03B

Abstract:
A shutter for a camera comprising:a supporting plate having an opening therethrough; a fixed printed board held by the supporting plate and provided with an opening therethrough, and having a plurality of coil patterns disposed thereon substantially in a concentric shape relative to a center of an optical axis of the opening, each coil pattern having a spiral shape; a shutter base plate having an opening therethrough; a movable printed board having one face confronting one face of the fixed printed board and being pivotably supported by the shutter base plate and having an opening therethrough, and a plurality of coil patterns disposed thereon substantially in a concentric shape relative to a center of an optical axis of the opening, each coil pattern having a spiral shape; a biasing member for biasing the movable printed board in one direction; and a plurality of sectors engaged to undergo pivotal movement with the movable printed board so as to open and close in response to pivoting of the movable printed board; and a drive circuit connected to the coil patterns for controlling the supply of electricity to the coil patterns such that repulsive magnetic forces are generated while opening the shutter and attractive magnetic forces are generated while closing the shutter.