Patent ID: 6226460
Filing Date: 2001-05-01
Classification: G02B

Abstract:
A movable filter device to be incorporated in a camera, comprising:a rotary member for holding an optical filter;a holding member for supporting said rotary member rotatably about a pivot point;at least one stopper for abutting against said rotary member for limiting rotation of said rotary member between a first position in which said rotary member is adapted to be set so that the optical filter is positioned on the optical axis of the camera, and a second position; andan elastic member having a first end coupled to said rotary member at a first point, and a second end coupled to said holding member at a second point;wherein the positions of said second point and said first point are determined so that a line linking said pivot point and said second point may intersect with the track of said first point within limitations of the rotation, said elastic member generates a force in a direction of extending the distance between said first point and said second point, and said rotary member is thrust by the force generated by the elastic member toward said first position or said section position; andwherein said rotary member includes at least one elastically deformable low-rigidity portion positioned such that, when said at least one stopper abuts against said rotary member, said at least one stopper abuts against said at least one elastically deformable low-rigidity portion so that impact between said rotary member and said at least one stopper is absorbed by elastic deformation of said at least one elastically deformable low-rigidity portion.