Head drum assembly of video cassette recorder

Details Head drum assembly of video cassette recorder Head drum assembly of video cassette recorder

1996-10-28

1998-03-03

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 1561

Patent

active

057242135

ABSTRACT:
A head drum assembly of a VCR is disclosed which can prevent Jitter and Wow-flutter of signals while recording and reproducing signals and can additionally supply a lubricant. A bearing housing in which lubricant containing groove is formed is integrally formed with a lower drum. Two journal bearings are mounted on the inner side of the bearing housing and support and lubricate a shaft which drives an upper drum. The lubricant in each of the lubricant containing grooves flows into a clearance between the outer surface of the shaft and the inner surface of each of journal bearings along a path formed by the lubricant containing groove, slits, and the lubricating groove, so that an oil film is formed between the shaft and the inner surface of each of the journal bearings. The lubricant can be additionally supplied through lubricant supplying holes.

REFERENCES:
patent: 4273390 (1981-06-01), Swearingen et al.
patent: 4706143 (1987-11-01), Asada et al.
patent: 4972283 (1990-11-01), Kim
patent: 5277499 (1994-01-01), Kameyama

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