US 5,627,699 A · Magnetic disk unit

Abstract

To provide a lubricant supply being capable of supplying adequate lubricant over a long period in a magnetic disk unit comprising a lubricant supply to reduce friction between a magnetic disk and magnetic head. A unit of the invention can supply lubricant uniformly to a magnetic disk, and easily controls supply volume. This comprises a material impregnated with lubricant having sufficient lubricant to supply over a long period, a thin film to supply predetermined lubricant to a disk surface, the film permeable by lubricant from the material impregnated with lubricant, and a clamp assembly to fix the material impregnated with lubricant and the thin film to the disk. The thin film is fixed on the disk and compressed by a compression part formed at the edge of the clamp assembly. The degree of compression controls lubricant supply to the disk.

Claims7

Dependent claims

A magnetic disk unit comprising:

a spindle motor;
a magnetic disk;
a clamp assembly to secure the magnetic disk to the spindle motor the clamp assembly having a plurality of convex parts formed on it;
a material impregnated with lubricant located between the clamp assembly and the magnetic disk;
a porous film permeable by the lubricant and located between the material impregnated with lubricant and the disk, the porous film having notches formed on its outer circumference in accordance with the convex parts;
and
an assembly to hold and fix the material impregnated with lubricant and the porous film between the clamp assembly and the disk, wherein the porous film is secured on the disk by the clamp assembly through mating of the notches of the porous film with the convex parts of the clamp assembly, and the lubricant in the material impregnated with lubricant is supplied on the disk surface through the porous film.

4 more elements

Dependencies are inferred from the claim text.

Magnetic disk unit

Life of this patent

Magnetic disk unit

Life of this patent

Abstract

Claims7