ACTUATOR

摘要

An actuator (1) is provided with a movable part (120), a support part (110) that supports said movable part, and a torsion bar (230) that connects the movable part and the support part to each other in a long direction such that the movable part can swing about an axis of rotation in said long direction. A first part of the torsion bar, said first part being comparatively far from the axis of rotation, is less dense than a second part of the torsion bar, said second part being comparatively close to the axis of rotation.