Magnetic disk drive

• Main Authors: OKAZAKI TOSHIHISA, OKUNAGA NOBUYUKI
• Format: Patent
• Language: English
• Published: 03.09.2002
• Edition: 7
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

There is disclosed a support structure for a magnet-yoke assembly which prevents the magnet-yoke assembly, when vibrated on receipt of the driving reaction of a carriage, from causing a magnetic head and a magnetic disk to vibrate and which is independent of temperature. In a magnetic disk drive having a magnetic circuit which gives a driving force to a carriage 7 holding a magnetic head so as to position the magnetic head, the magnetic circuit comprises a driving coil 9 attached fixedly to the carriage and a magnet-yoke assembly 8, and the magnet-yoke assembly 8 is supported in a housing at one point thereof so as to be able to rotate in the direction parallel to the surface of the magnetic disk. The assembly is rotatably supported by means of a bearing 14 and the bearing is given with an initial displacement so as to increase the axial bearing rigidity thereof. A base 10 is provided with a slip guide 16 which allows the magnet-yoke assembly 8 to rotate with low friction and serves to give the initial displacement to the bearing. A visco-elastic member 17 is provided for restricting the rotation of the assembly.