HELICAL BAND DRIVE FOR DISC STORAGE APPARATUS

摘要

A disc drive including a drive mechanism including a stepper drive motor (6) for moving a carriage (17) or the like to any desired position between two extreme positions along a path of travel. The drive motor includes a rotatable shaft (12) coupled to the carriage through a band (14) which is helically wound on the motor drive shaft. The band is wound on the shaft in two portions (14A, 14B), one portion being wound on the shaft while the other is unwound. The carriage forms part of a head positioning apparatus which mounts a magnetic head for movement relative to a recording medium in response to movement of the carriage by the drive motor.