Abstract: Provided in the vicinity of both sides of a disk loading slot, are rods which rotate when contacted by a disk that is loaded, and disk check levers which are in contact with the rods and rotate by a principle of a lever. With such a disk loading apparatus, when loading a disk into a reproduction apparatus, incorrect loading of a disk due to a difference in disk sizes is prevented.

Abstract: The present invention provides a gear mechanism of a power transmitting system, which includes a crank gear operatively coupled with a crankshaft, and a first driven gear that is coupled with a first balance shaft via a damping mechanism that allows relative rotation between the driven gear and the balance shaft. The damping mechanism includes a friction damper that generates frictional force when the first driven gear and a counter gear fixed to the first balance shaft rotate relative to each other within a predetermined rotational phase range or angle, and a stopper rubber or rubbers that elastically deforms to generate elastic force when the first driven gear and the first balance shaft rotate relative to each other beyond the predetermined rotational angle.