Head feeding device including a screw shaft provided with a pair of grooves with one groove being provided with a lubricant
US5682282A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1996 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Oct 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A head feeding device includes a screw shaft having a thread groove formed with a predetermined pitch, a driver for turning the screw shaft, a head guided in the axial direction of the screw shaft by a shaft bearing sliding on a surface of the screw shaft, and an engagement member that engages in the thread groove of the screw shaft and converts the turning force of the screw shaft into the axial head moving force. A second groove for containing a lubricant is formed on the screw shaft having the same pitch as that of the thread groove. The second groove retains lubricant scraped out of the thread groove by the engagement member. Therefore, lubricant is reliably supplied to the sliding surfaces between the screw shaft and the shaft bearing, thereby eliminating problems caused by increased friction or seizure, and thereby improving the head feeding accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.