Head drum assembly of a video cassette recorder

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

1996-12-12

1998-05-12

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 1561

Patent

active

057515204

ABSTRACT:
Disclosed is a head drum assembly of a video cassette recorder which can support the radial load and the thrust load of the shaft. The head drum assembly includes a lower drum, an upper drum, a motor for generating a rotational force, a shaft for transferring the rotational force of the motor to the upper drum, a housing formed at an inner portion thereof with lubricant containing grooves, lubricating pads for containing the lubricant and being inserted into the lubricant containing grooves, bearings inserted into the housing, and a shield plate disposed between the bearing and the upper drum, for preventing the evaporation of the lubricant of the bearing. The radial load and thrust load of the shaft are effectively supported, a long term lubrication can be achieved by the prevention of the evaporation of lubricant in the bearing, and jittering and wow-fluttering can be prevented while recording a video information onto a magnetic tape or reproducing the video information from the magnetic tape.

REFERENCES:
patent: 4961122 (1990-10-01), Sakai et al.
patent: 4972283 (1990-11-01), Kim
patent: 5277499 (1994-01-01), Kameyama

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