Matsushita Electric Industrial Co., Ltd.

Kenji Akimaru

Teruyuki Takizawa

Yoshihiro Ikawa

Masahiro Inata

Yoshito Sazi

Koji Miyata

A disk drive including a motor that rotates a disk, an auto-balancer connected to a rotating portion of the motor, a base secured to the motor and connected to an external member via a first elastic member, and a dynamic vibration absorber connected to the base via a second elastic member. When the disk makes a whirling motion while being rotated by the motor, a phase angle of 120 degrees to 180 degrees is formed between a direction that is pointed from a whirling center axis toward a center of mass of the disk and a direction that is pointed from the whirling center axis toward the center of mass of the auto-balancer.

Disk device

A disk drive apparatus of the present invention, includes: a movable portion, a stationary portion disposed around the movable portion, and a damping portion disposed between the movable portion and the stationary portion, for connection therebetween, the movable portion, the stationary portion, and the damping portion being disposed substantially in a plane, wherein a head for performing at least one of recording or reproducing information with respect to a disk, a head drive portion for moving the head, and a rotation drive portion for driving a disk are provided on the movable portion.

Disk drive apparatus

To improve the accuracy in holding a disc and to reduce unwanted vibration occurring when the disc is rotated at a high speed (the whirling of a turn table and a rotor), a spindle motor for rotating a disc comprises a turn table (,) that holds a disc (,) to rotate it, a rotor (,) that applies rotational driving force to the turn table, and a rotating shaft (,) provided on the rotation axis of the rotor, wherein the rotating shaft is fixed on the rotation axis of the turn table using a first support member, and the turn table and the rotor are supported by a second support member consisting of a filler filled in a predetermined gap (,).

Spindle motor and its manufacturing method

The swing centers of guide shafts in inclination adjustment of an optical head are set to be on a plane which is perpendicular to a predetermined radial direction of an optical disk and has thereon the rotation axis of a disk motor. When the inclination adjustment of the optical head is conducted, relative gap variation between the optical head and the optical disk does not occur, and the inclination adjustment is realized within a movable range of an objective lens. The inclination angle of the optical head in a radial direction of the optical disk is adjusted by simultaneously moving upward or downward ends of two guide shafts, and the inclination angle of the optical head in a tangential direction of the optical disk can be adjusted by moving upward and downward one end of at least one of the guide shafts.

Growing community of inventors

Osaka, Japan

Kenji Akimaru