Abstract: A disk drive unit includes a spindle motor, which has a pivot and a substantially cylindrical hub which is rotatably supported on the pivot and constitutes a rotor. A disk is fitted coaxially on the hub, and an annular clamp member holding the disk is fitted on an end portion of the hub. The clamp member has an inner peripheral edge fitted on an outer peripheral surface of the hub, a plurality of engaging portions spaced in the circumferential direction thereof and capable of engaging a removing tool, and a plurality of notch portions which are formed along the inner peripheral edge between the engaging portions and define gaps outside the outer peripheral surface of the hub.

Abstract: A method for manufacturing an objective lens driving apparatus comprising a lens holder which holds an objective lens and is driven in a focusing direction and a tracking direction with reference to the optical disk, at least two wires having first ends secured to the lens holder and controlling posture of the lens holder, and a wire holder to which second ends of the wires are fixed, the method comprising the steps of preparing a first integrally molded member including the lens holder and the wire holder which are connected together by a holder connecting frame to be removed after assembly, preparing a second integrally molded member including the wires which are suspended from a wire holding frame to be removed after assembly, positioning the second integrally molded member relative to the first integrally molded member such that the first ends of the wires are connected to the lens holder and the second ends of the wires are connected to the wire holder, and removing the wire holding frame and the holder

Abstract: A method for manufacturing an objective lens driving apparatus comprising a lens holder which holds an objective lens and is driven in a focusing direction and a tracking direction with reference to the optical disk, at least two wires having first ends secured to the lens holder and controlling posture of the lens holder, and a wire holder to which second ends of the wires are fixed, the method comprising the steps of preparing a first integrally molded member including the lens holder and the wire holder which are connected together by a holder connecting frame to be removed after assembly, preparing a second integrally molded member including the wires which are suspended from a wire holding frame to be removed after assembly, positioning the second integrally molded member relative to the first integrally molded member such that the first ends of the wires are connected to the lens holder and the second ends of the wires are connected to the wire holder, and removing the wire holding frame and the holder