Head feeding mechanism
US6724714B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Oct 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A head feeding mechanism which includes a screw shaft adapted to rotate in the normal and reverse directions using a motor as a drive source, a nut member engaged with the screw shaft, and a spring member connected to a head and adapted to elastically press the nut member against the screw shaft and which causes the head to reciprocate in the thrust direction of the screw shaft through the intermediation of the nut member through rotation of the screw shaft. The nut member has a substantially cylindrical female screw engaged with a male screw of the screw shaft, and the nut member is elastically biased in both the radial direction and the thrust direction of the screw shaft by the spring member. In this construction, if the elastic biasing force in the radial direction of the spring member holding the nut member in pressing contact with the screw shaft is set small, the female screw of the nut member does not move over the male screw of the screw shaft, so that a small torque suffices for the motor rotating the screw shaft, which is effective in achieving a reduction in the size of the motor and the entire head feeding mechanism including the motor. Further, the thrust play of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.