Small sized magnetic recording and reproducing apparatus with improved rotating magnetic head
US4814910A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | May 27, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/6653
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rotating magnetic head device in a magnetic recording and reproducing apparatus constructed as follows: PA0 (1) A cylinder is composed of an upper fixed cylinder and a lower fixed cylinder, a recess is provided in the part of the upper fixed cylinder where a magnetic tape is not wound, and an inner lid, a top case or the like of the tape cassette is arranged (inserted) in the recess in overlapping fashion, thereby making it possible to reduce the size of the apparatus. PA0 (2) A stator base which has a surface parallel to a rotary disc having magnetic heads placed thereon and which holds a clearance from the rotary member is disposed on the side of the rotary disc closer to the lower fixed cylinder, thereby to magnetically shield a rotary transformer unit from various electromagnetic components and to prevent the degradation of the signal-to-noise ratio of signal transmission attributed to the compaction of the apparatus, and further, various members are received within the lower fixed cylinder, thereby making it possible to heighten the packaging density of the received members and to reduce the size of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.