SWING MEMBER DEVICE, AND OPTICAL DEFLECTOR AND IMAGE-FORMING APPARATUS EMPLOYING THE SWING MEMBER DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a swing member device which has a simple constitution and can be produced at a low cost, and is affected less by unsteady drag force caused by ambient atmosphere in the region of movement of the swingable member with which the shake of the swing member is suppressed, and to provide an optical deflector and an image-forming apparatus. SOLUTION: A swing member device comprises a swingable part supported by a supporting part to be swingable around a torsional axis on a supporting base in at least one intrinsic oscillation mode: the swing member device having a temperature-raising unit for raising the temperature of ambient atmosphere in the region of swing motion of the swingable part, the temperature-raising unit raising the temperature of the ambient atmosphere to enable decrease in an influence of an unsteady dragging force caused by the ambient atmosphere. COPYRIGHT: (C)2009,JPO&INPIT