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US 5,313,347 AGranted
Rotating magnetic head for a magnetic recording reproduction system
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorYasuo Mitsuhashi
Life of this patent
Estimating the term…
Abstract
A rotating magnetic head for a magnetic recording reproduction system. The rotating magnetic head detects the position of the rotating head placed on the periphery of a rotating drum, and perform servo control of the position of the movable head. The detection of the position of the rotating head is realized by an optical, non-contact mechanism or by detecting the difference of the track scanned by fixed heads. The former requires more than one movable heads and the latter requires a fixed head.
Claims20
A rotating magnetic head unit for a magnetic recording reproduction system comprising:
- rotating drum means rotating at a designated speed, the magnetic tape being transported in contact around a periphery of said rotating drum means, an axis of rotation of said rotating drum means having a designated angle with respect to a width direction of the magnetic tape;
- movable head means, mounted to project radially from the periphery of said rotating drum means to contact the magnetic tape, for recording and reproducing signals on the magnetic tape, said movable head means being movably supported along the axis of rotation of said rotating drum means;
- fixed head means, mounted to project radially from the periphery of said rotating drum means to contact the magnetic tape, for recording and reproducing signals on the magnetic tape, said fixed head means being mounted relative to said movable head means a designated angle around the periphery of said rotating drum means;
- head position detector means for detecting a position of said movable head means along the axis of rotation of said rotating drum means;
- head position controller means, coupled to said head position detector means, for generating a control signal indicative of a difference between the detected position and a designated standard position of said movable head means during normal recording;
- and
- head driver means, operatively coupled to said movable head means, for driving said movable head means along the axis of rotation of said rotating drum means to the designated standard position, in accordance with the control signal.
4 more elements
A rotating magnetic head unit, for use in a magnetic recording/reproducing apparatus, comprising:
- rotating drum means rotating at a designated speed, magnetic tape being transported in contact around a periphery of said rotating drum means, an axis of rotation of said rotating drum means having a designated angle with respect to a width direction of the magnetic tape;
- movable head means, mounted to project radially from the periphery of said rotating drum means to contact the magnetic tape, for recording and reproducing signals on the magnetic tape, said movable head means being movably supported along the axis of rotation of said rotating drum means;
- non-contact head position detection means, mounted upon a frame member of the magnetic recording/reproducing apparatus parallel to a contact area of said rotating drum means and the magnetic tape, for detecting a position of said movable head means along the axis of rotation of said rotating drum means;
- head position control means, coupled to said head position detection means, for generating a control signal indicative of a difference between the detected position and a designated standard position of said movable head means during normal recording;
- and
- head driver means, operatively coupled to said movable head means, for driving said movable head means along the axis of rotation of said rotating drum means to the designated standard position, in accordance with the control signal.
3 more elements
A rotating magnetic head unit, for use in a magnetic recording/reproducing apparatus, comprising:
- rotating drum means rotating at a designated speed, magnetic tape being transported in contact around a periphery of said rotating drum means, an axis of rotation of said rotating drum means having a designated angle with respect to a width direction of the magnetic tape;
- at least one pair of movable head means for recording and reproducing signals on the magnetic tape, said movable head means of said at least one pair of movable head means being mounted in axial symmetric positions with respect to the axis of rotation of said rotating drum means and being movably supported along the axis of rotation of said rotating drum means;
- a designated number of non-contact head position detecting means, mounted upon a frame member of the magnetic recording/reproducing apparatus parallel to a contact area of said rotating drum means and the magnetic tape, for detecting positions of said movable head means along the axis of rotation of said rotating drum means;
- head position control means, operatively coupled to said plurality of head position detecting means, for generating control signals indicative of differences between the detected positions and designated standard positions of said movable head means during normal recording;
- and
- at least one pair of movable head drivers, of number equal to said at least one pair of movable head means, for driving said movable head means along the axis of rotation of said rotating drum means to the designated standard positions, in accordance with the control signals.
3 more elements
Dependencies are inferred from the claim text.