Teac Corporation

Masasi Tanaka

Hiroyuki Onda

Tsutomu Morita

Susumu Niinuma

Yo Kamei

Katsumi Aoyama

A disk apparatus includes a metallic chassis unit including a portion being grounded. A movable unit is provided to be movable relative to the chassis unit between an inserted position and a pulled-out position, the movable unit including an optical disk and electric parts for reproducing a signal indicative of information from the optical disk, the movable unit being included in the chassis unit when the movable unit is moved to the inserted position, and being pulled out from the chassis unit when the movable unit is moved to the pulled-out position. A conductive member is provided in the movable unit to protect the electric parts against a discharging of static electricity, the conductive member being electrically connected to the chassis unit when the movable unit is at the inserted position, the electric connection allowing a flow of a discharging current between an operator and the grounded portion of the chassis unit, and the conductive member being separated from the chassis unit when the movable unit is at the pulled-out position.

Disk apparatus in which protection against discharging of static

An optical disk apparatus includes a disk servo unit which generates a servo signal based on a data signal read from an optical disk. The servo signal is supplied to a disk motor to control a rotation of the motor so that a linear velocity of the disk is kept constant when data is read from or written onto the disk. The disk servo unit is connected to the motor when the data is read from or written onto the disk, so that the servo signal is supplied to the motor, and the disk servo unit is disconnected from the motor when a pickup jumps from a present track of the disk to a destination track thereof so that the supply of the servo signal to the motor is inhibited. A velocity change signal which enables the motor to increase or decrease a rotating speed of the motor is generated depending on which one of two directions of the track jump is specified by a direction signal. A time signal which defines an estimated time of the track jump required to change an angular velocity at the present track to an angular velocity at the destination track is generated. The optical disk apparatus supplies the velocity change signal to the motor during the estimated time.

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Higashimurayama, Japan

Masasi Tanaka