Head lift mechanism
US4392165A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1981 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Mar 30, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A mechanism for loading and unloading magnetic heads from the surfaces of a magnetic disc is described. The invention uses lift rods which are pivoted about a portion of their length and have offset sections which cooperate with the head lift arms or mounting flexures upon which the magnetic heads are mounted. The lift rods are controlled through other offset sections located along their lengths. These other offset sections, in the preferred embodiment, are pressed against conical surfaces which are oriented so that the axes of the surfaces are in a direction perpendicular to the pivoting axes of the lift rods. Movement of the conical surfaces toward and away from the pivoting axes of the lift rods imparts an arcuate motion to the offset sections of the lift rods with which they cooperate, and this correspondingly produces arcuate motions in the offset sections which cooperate with the head mounting flexures. By this motion, the magnetic heads are gently loaded or unloaded onto or from a magnetic disc. In the preferred embodiment, the motion of the conical surfaces are accurately controlled by a linear stepper motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.