Objective lens driving device

Abstract

Abstract PURPOSE:To improve workability and to reduce cost, by bringing into coincidence the axial lines of the constituting parts provided for the movable member and for the fixed member of a driving means, in a state where an elastic supporting member is bent. CONSTITUTION:The coil 43 of an electromagnetic driving means driven in a tracking direction orthogonal to the optical axis of an objective lens 41 is mounted at a movable member 42 which includes the lens 41, and a permanent magnet 45 operated with the coil is mounted at a fixed member 44. And after the movable member 42, and the fixed member 44 are positioned so that the axis line P of the coil 43 is positioned at the upper part higher than the axis line Q of the permanent magnet 45, plural elastic supporting members 46 are coupled with the movable member, and the fixed member, keeping a freely coupled state. At this time, the position of the fixed member 44 coupling with the elastic supporting member, is set so that the elastic supporting member 46 is positioned almost flatly. By coupling the movable member 42 with the fixed member 44 through the elastic supporting member 46, the movable member set in a free state is lowered to a position where the axis line P of the coil 43 coincides with the axis line Q of the permanent magnet 45. In this way, a coupling work can be quite easily performed, and accurate assembling can be attained.

Inventors

• 👤 Norio Shimizu
• 👤 徳生 清水

Bibliographic Details