magnetic disk device

Abstract

Abstract PURPOSE:To reduce extremely the degree of danger of a head crush accident by using a means which changes the spacing between a magnetic head and a magnetic disk within a range where the buoyancy of the head is produced by the dynamic pressure of a floating element. CONSTITUTION:When a magnetic head is floating, the length L between a slider 2 and the tip of a guide arm 6 is set at 30mm. with application of voltage. Thus the deflection amount of a plate spring is reduced by about 3mm. at a slider part 2, and the spacing is increased to 0.7mum. When a record/reproduction (R/W) instruction for information is delivered from a computer main body (not shown in the diagram), a positioning device 13 is actuated by a positioning device control circuit 11 with a command of a controller 10. Then the slider 2 is positioned at a desired track. Furthermore, a piezoelement 7 is driven simultaneously with the start of a positioning action. Thus the spacing is reduced. Then the end of the positioning action is informed to the controller 10, and an R/W action is executed by an R/W circuit 14.

Inventors

• 👤 Yoshiyuki Hirano
• 👤 義行 平野
• 👤 Yosuke Seo
• 👤 瀬尾　洋右
• 👤 Toyoji Okuwaki
• 👤 奥脇　東洋治
• 👤 Katsuhiko Kato
• 👤 勝彦 加藤
• 👤 Takashi Tamura
• 👤 田村　喬

Bibliographic Details