Storage apparatus offering improved precision in positioning carriage relative to disk

摘要

Provided is a storage apparatus in which the resonant frequency of carriage driving coils is high and precision in positioning a carriage is excellent. The storage apparatus is, for example, an optical disk drive having rails laid parallel to one radius of a disk, and able to read or writing data from or on the disk using a carriage movable along the rails. The carriage is moved using driving coils mounted on the flanks of the carriage and magnetic circuits each composed of a permanent magnet and yokes which are located outside the carriage. The driving coils are each shaped like a parallelepiped whose sides extending in a direction along the flank of the carriage are longer than other sides extending in a direction perpendicular to the flank. The permanent magnet or yokes of each magnetic circuit is opposed to a plane containing the long sides of each of the parallelepiped-shaped driving coils. Consequently, the rigidity of the carriage driving coils has been raised and precision in positioning the carriage has been improved.