Patent ID: 8077562
Filing Date: 2011-12-13
Classification: G11B

Abstract:
1. An optical disc apparatus, comprising: a disc rotation mechanism for allowing an optical disc having an information recording face to be placed thereon and rotating the optical disc; an optical pickup including an engaging section and irradiating the information recording face with a light beam to perform at least one of information recording and information reproduction; a base main body for rotatably supporting the optical pickup and having the disc rotation mechanism; a driving source, supported by the base main body, for generating a force for rotating the optical pickup; and a driving force transmission mechanism supported by the base main body, including a worm, and engaged with the engaging section to transmit a driving force of the driving source to the optical pickup, thereby rotating the optical pickup; wherein a distance between the engaging section and a rotating axis of the optical pickup is longer than a distance between the center of gravity of the optical pickup and the rotating axis of the optical pickup; and the driving force transmission mechanism includes a worm wheel engageable with the worm and driven by the worm, and where the advancing angle of the worm is θand a static coefficient of friction for the worm is μ, tan θ<μ.