Patent ID: 6778340
Filing Date: 2004-08-17
Classification: G03B

Abstract:
A lens mounting mechanism comprising:a barrel mounting member mountable on an outer periphery of a lens barrel having a lens disposed therein, the barrel mounting member having a cylindrical portion, a flange portion extending radially outwardly from one end of the cylindrical portion, and projections projecting radially outwardly from the other end circumferential plural positions of the cylindrical portion; a base member fixed to an apparatus body to which the lens barrel is mounted, the base member having a hole portion through which the cylindrical portion is inserted together with the lens barrel, a groove formed on an inner periphery of the hole portion for enabling the projections to be inserted, and an opening end surface of the hole portion to which the flange portion is abutted; and a ring member rotatably disposed in a state of being clamped by the base member, the ring member having a recess on an inner periphery thereof for enabling the projections to be inserted in the same manner as the groove, wherein the lens barrel is mounted to the apparatus body by rotating the ring member and aligning the groove on the base member and the recess on the ring member in the circumference direction, inserting the lens barrel into the hole portion until the flange portion of the barrel mounting member abuts against the opening end surface, and subsequently rotating the ring member for displacing the recess and the groove in the circumferential direction so that the projections are locked by the ring member and thus the barrel mounting member is fixed.