Sanyo Electric Co., Ltd.

Takaya Kamimura

Hideki Ishida

Ichiro Takahara

Masaaki Azumi

Kazuo Shigetomi

The invention relates to a structure for and a method of adjusting the position of a magnetic head especially tangentially of a magnetic disk with improved accuracy for use in an optomagnetic disk device. The device has a head support unit comprising a pickup having an objective lens mounted thereon, and a head arm connected to the pickup and provided with a magnetic head the head arm being adjustable in position relative to the pickup so that the magnetic head is opposed to the objective lens on the pickup the head support unit being movable radially of the disk. The pickup has at least one screw hole for attaching the head arm thereto, and the head arm has a slit opposed to the screw hole of the pickup and in parallel to the tangential direction of the disk. A screw is slidably fitted in the slit of the head arm and has its distal end screwed in the screw hole An elastic member is provided between the screw and the head arm for pressing the head arm against the pickup

Magneto-optic disk device and method of positioning magnetic head of the device

To accurately move a pickup 31 along a radial line of an optical disc in an optical disc apparatus for recording signals on both sides of the disc or reproducing the signals from the both sides, the pickup 31 is mounted on a support base 30 coupled to transport means and movable by being guided by a U-shaped guide assembly 5 which is fixedly and accurately positioned on a chassis carrying a disc drive motor. The guide assembly 5 comprises a pair of straight travel guide portions disposed in parallel to each other on opposite sides of the plane of rotation of the disc, and a circular-arc guide portion interconnecting the two guide portions. When reproducing the recorded signals, the pickup 31 accurately reciprocatingly moves on the disc radial line along the straight travel guide portions, and when the reproduction position is changed from one side of the disc to the other side, the pickup quickly moves upward or downward along the circular-arc guide portion.

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Nara, Japan

Takaya Kamimura