Abstract: An optical scanning actuator includes a leaf spring member that has a base end fixed and a tip end, a light source that is fitted to the leaf spring member, an electromagnetic driving unit that oscillates the tip end of the leaf spring member, and an optical element that is fitted to the leaf spring member and that is irradiated with light outgoing from the light source to reflect or refract the light to thereby scan the light.

Abstract: For realizing widening of a light scanning angle and is excellent in durability, the optical scanning actuator includes a movable unit that supports an optical element, a plurality of leaf springs having a thin plate shape with one end portion being fixed and another end portion being attached to the movable unit, and an electromagnetic driving unit including a magnet, a yoke laminated on the magnet to form a closed magnetic circuit together with the magnet, and a coil held by the movable unit. The coil is positioned in a gap between the magnet and the yoke such that opening plane of the coil is substantially orthogonal to a laminating direction of the magnet and the yoke. The movable unit is driven by an electromagnetic force applied to the coil.

Abstract: An object detector has a light projecting unit that projects light, a light scanning actuator that scans the light, and a light receiving unit. The light scanning actuator includes plate springs, each having a thin-plate shape and one end in a longitudinal direction thereof being fixed; a movable part attached to the other ends in the longitudinal directions of the plate springs; and an electromagnetic driving unit having a magnet that generates a magnetic flux, a yoke that forms a closed magnetic circuit with the magnet and has a part being stacked on the magnet, and a coil held by the movable part and positioned in a gap between the magnet and the yoke such that an aperture plane is substantially orthogonal to a stacking direction of the magnet and the yoke, the electromagnetic driving unit configured to drive the movable part by an electromagnetic force applied to the coil.

Abstract: An optical scanning actuator includes a fixed member having a light source, a movable member having an optical element that deflects light emitted from the light source and caused to vibrate by a driving unit in a direction perpendicular to an optical axis of the optical element, and a joint unit that connects the fixed member and the movable member, supports the movable member, and is bent in a direction perpendicular to an optical axis of light emitted from the light source by vibration of the movable member. The optical scanning actuator scans light emitted from the light source in an vibration direction by vibration of the optical element along with the vibration of the movable member. The joint unit includes pairs of joint members connected via at least one deformation reducing member that reduces bending deformation of the joint members caused by the vibration of the movable member.

Abstract: An optical scanning actuator includes a leaf spring member that has a base end fixed and a tip end, a light source that is fitted to the leaf spring member, an electromagnetic driving unit that oscillates the tip end of the leaf spring member, and an optical element that is fitted to the leaf spring member and that is irradiated with light outgoing from the light source to reflect and refract the light to thereby scan the light.