Head drum assembly for use in a video cassette recorder

Details Head drum assembly for use in a video cassette recorder Head drum assembly for use in a video cassette recorder

1996-11-27

1998-08-25

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 75, 360107, G11B 553, G11B 5588

Patent

active

057988935

ABSTRACT:
A head drum assembly, for use in a video cassette recorder, comprises a rotary drum provided with a circumferential side wall and at least one opening provided thereon, a pair of heads each of which is provided with a head chip and a head base, a guide member for guiding the head base in a direction that is substantially parallel to the rotating shaft, and an electromagnet for moving the head in the direction parallel to the rotating shaft while the head chip is in contact with the magnetic tape. The rotary drum is held rotatable by a bracket. The heads are disposed 180.degree. from each other on an inner bottom surface of the rotary drum, the head chip coming in contact with a magnetic tape partially wrapped around the rotary drum through the opening. The guide member is secured on the inner bottom surface of the rotary drum, guiding the head base in the direction parallel to the axis of the rotary drum. The electromagnet is curved along a path of rotation of the head base and is held stationary immediately above the guide member by a holder secured to the bracket, moving the head in the direction parallel to the axis of the rotary drum to allow the head chip to dynamically follow the track recorded on the magnetic tape.

REFERENCES:
patent: 4151569 (1979-04-01), Hathaway
patent: 4337492 (1982-06-01), Brookhart et al.
patent: 4344099 (1982-08-01), Kawachi et al.
patent: 4365279 (1982-12-01), Kinjo
patent: 4446497 (1984-05-01), Hirayama
patent: 4485414 (1984-11-01), Baker
patent: 4710828 (1987-12-01), Sulzer

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