Patent ID: 6350068
Filing Date: 2002-02-26
Classification: G03B,H04N

Abstract:
A quantity-of-light adjusting device comprising:a) a drive source, said drive source having a plurality of magnetically stable points; b) a base member having an opening formed therein; and c) a blade arranged to move by being driven by said drive source and having two openings formed therein side by side in a row in a moving direction of said blade, wherein, between the two openings formed in said blade, there is provided a light blocking area which is larger than the opening formed in said base member; wherein said base member has a restricting part formed therein to restrict a moving range of said blade by an arm member fixed to said drive source abutting on said restricting part, and wherein said restricting part is set in a position nearer than the position of said arm mater obtained when said drive source is located at one of the magnetically stable points, so that said arm member abuts on said restricting part by using a magnetic force of said drive source acting toward the magnetically stable point.