Dynamic magnetic information storage or retrieval – Record transport with head moving during transducing – Tape record
Patent
1995-02-28
1997-06-10
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head moving during transducing
Tape record
360 962, G11B 1500, G11B 1544
Patent
active
056382324
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a recording and/or reproducing apparatus for a tape-shaped recording medium for recording and/or reproducing information signals by a head of a rotary head unit having a sliding contact with the tape-shaped recording medium.
BACKGROUND OF THE INVENTION
There has hitherto been employed a helical scan tape recorder in which a rotatable magnetic head provided in a rotary head unit has a sliding contact with a magnetic tape which is wound about the perimetrical surface of the rotary head unit and which is run in one or the other direction in order to effect recording and/or reproduction of information signals. With this type of the tape recorder, a tape cassette having a magnetic tape wound across a pair of tape reels rotatably mounted within a cassette unit is employed as a recording medium.
In a tape recorder having a tape cassette and a rotary head unit as a recording medium and as recording and/or reproducing means for information signals, respectively, it has been proposed to cause a rotationally driven magnetic head of the rotary head unit to have a relative sliding contact with a running magnetic tape within the cassette unit in order to effect recording and/or reproduction of information signals.
By utilizing such a design in which the rotary head unit extends into the cassette unit, the tape recorder itself may be reduced in size.
Specifically, the tape cassette as a recording medium is loaded into a position within a recorder main body of the tape recorder. When the tape cassette is loaded in its loaded position, a pair of reel driving shafts provided on the tape recorder side extend into and are engaged by a pair of tape reels of the tape cassette. If one or both of reel driving shafts are rotatably driven, the magnetic tape wound across a pair of tape reels travels from the supply side tape reel towards the takeup side tape reel.
The portion of the magnetic tape wound within the tape cassette which is run across the tape reels is exposed outwardly by means of an opened face of the cassette unit. The magnetic tape is exposed through the front surface side of the cassette unit facing the rotary head unit. When the tape cassette is loaded in position within the tape recorder, the rotary head unit is extended into the tape cassette from the front side of the cassette unit so as to have a sliding contact with the magnetic tape.
Within the tape cassette, a pinch roller is provided at the reverse side of the magnetic tape running across the tape reels which is opposite to the front side thereof facing outwardly of the cassette. The pinch roller is formed of a high frictional coefficient material, such as butyl rubber, and is cylindrically-shaped and rotatably mounted with its outer peripheral surface in sliding contact with the reverse surface of the magnetic tape.
On the other hand, the rotary head unit provided on the tape recorder side is provided with a cylindrically-shaped stationary drum and a rotary drum which is mounted coaxially with the stationary drum and which is rotatably supported with respect to the stationary drum. The magnetic tape is wrapped around the stationary drum and the rotary drum. The magnetic head is mounted on the surface of the rotary drum facing the stationary drum and is slightly protruded from the outer peripheral surface of the rotary drum. By being mounted integrally with the rotary drum, the magnetic head is rotated in unison with the rotary drum.
When the above-described tape cassette is loaded in position within the tape recorder, the rotary head unit is extended into the tape cassette through the opened front surface of the cassette half. With the rotary head unit thus extended into the tape cassette, the magnetic tape running across the tape reels is wrapped over the peripheral surfaces thereof at a predetermined angle in order to achieve relative sliding contact between the magnetic head and the magnetic tape.
When the rotary head unit is partially extended into the inside of the tape cassette loaded in position,
REFERENCES:
patent: 3621149 (1971-11-01), Wada
patent: 3934840 (1976-01-01), Inaga
patent: 4025959 (1977-05-01), Warren
patent: 4763210 (1988-08-01), Grant
Katoku Takashi
Komoriya Morihiro
Tamura Masafumi
Frommer William S.
Sinderbrand Alvin
Sony Corporation
Wolff John H.
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