Patent ID: 10108006

Abstract:
This rotary drive apparatus is arranged to cause incoming light coming from a light source to be reflected, and rotate resulting reflected light, and includes a motor including a rotating portion arranged to rotate about a central axis extending in a vertical direction; a flywheel arranged below the light source, supported by the rotating portion, and caused by the rotating portion to rotate about the central axis; and a cover. The flywheel includes a lens arranged to allow the reflected light to pass therethrough; and a main body arranged to directly support the lens, or indirectly support the lens through a lens frame arranged to accommodate the lens therein. At least one of the lens and the lens frame is arranged radially outside of the main body. An upper surface of the main body is arranged to cross a light path along which the incoming light travels at a position axially overlapping with at least a portion of the light source. At least a portion of the lens is arranged to cross a light path along which the reflected light travels. At least a portion of the cover is arranged to extend all the way around the flywheel radially outside of the flywheel. At least one of at least a portion of the lens and at least a portion of the lens frame is arranged radially inside of the cover.