Magnetic disc device

Abstract

Abstract PURPOSE:To eliminate completely causes of head crush trouble by heating and cuving a bimetal supporting arm of a magnetic head to approximate in to the surface of a magnetic disc when a rotation number detector detects that the rotation number of the magnetic disc exceeds a value sufficient for floating of the magnetic head due to wind pressure. CONSTITUTION:A disc plate 2 is rotated around a revolving shaft 7; and when the rotation number of the disc plate 2 reaches a prescribed value, this state is detected by a rotaion number detector 3, and the detection signal is outputted from the rotation number detector 3 to a bimetal operating circuit 4 through a signal line 8. The bimetal operating circuit 4 supplied power to a part of a bimetal 5 through an electric wire 9 to heat in on a basis of this detection signal. Thus, the bimetal 5 is curved, and a magnetic head 1 stuck to its front end is approximated to the disc plate 2 and is held there while receiving the floating force accompanied with rotation of the disc plate 2, and data can be read from and written on the disc plate 2 by the magnetic head 1.

Inventors

• 👤 Yoshitaka Tanaka
• 👤 田中　美孝

Bibliographic Details