Mitsumi Electric Company Ltd.

Atsushi Kirii

Ken'ichi Furukawa

Kazutomo Imi

Satoru Manabe

Kouji Teranishi

Keiichi Sato

Ken'ichi Hori

Yoshimi Hanaika

Takashi Watanabe

Atsushi Kikuchi

Toshinori Kurosaka

Shinji Tsuyuki

Hirokazu Furuse

Ryuichi Saito

Ken'Ichi Hori

Wataru Minoya

A lens holder driving device includes a lens holder in which a lens assembly is mounted, a driving coil fixed to the lens holder at outside circumference thereof, an outer yoke including an outer hollow cylindrical portion and an ring-shaped end portion disposed an upper end of the outer hollow cylindrical portion, a magnet disposed to an inner wall surface of the outer hollow cylindrical portion so as to be opposite to the driving coil, an elastic member supporting the lens holder in a direction of an optical axis shiftably, and a base disposed at a lower side of the lens holder. The lens holder driving device includes a contact area reduction arrangement reducing a contact area between the ring-shaped end portion of the outer yoke and an upper end portion of the lens holder.

Lens holder driving device capable of ensuring linearity of wide range in driving response

Optical disc recording reproduction apparatus

In a disk apparatus for driving a recording disk medium, a spindle motor is provided with a rotary shaft. A chucking table, on which the recording disk medium is mounted, includes a support integrally formed with a support base having a supporting face which supports the recording disk medium, a cylindrical bearing part, into which the rotary shaft is fitted, extending from the support base in parallel with the rotary shaft, and an annular abutment part extended from the support base in parallel with the bearing part, to be abutted against an inner periphery of the recording disk medium. The chucking table includes at least one claw member provided in an outer periphery of the abutment part, and an urging member disposed between the claw member and the bearing part so as to retractably urge the claw member outwards in a radial direction of the recording disk medium.

Disk apparatus

Apparatus for reading optical disc

An optical pickup supporting device comprises a sheet metal base ( ), a main track ( ) for guiding an optical pickup so that the optical pickup ( ) is moved in a predetermined direction above the base, and a sub track ( ) for guiding the optical pickup in cooperation with the main track. The sub track is formed by a part of the base.

Optical pickup supporting device having simple and compact structure and capable of accurately supporting an optical pickup

A disk device for reproducing information and/or for recording information having a casing in which all parts of the disk device are included. The casing includes a number of first bosses and a recording/reproducing unit. The recording/reproducing unit includes at least a disk motor and an optical head. The optical head accesses the disk to reproduce information from the disk and/or record information in the disk. The recording/reproducing unit is arranged to have corners at positions corresponding to the first bosses of the casing. A plurality of vibration absorbing parts are provided and arranged at corners of the recording/reproducing unit. The vibration absorbing parts are also fixed to the first bosses to absorb vibrations of the recording/reproducing unit. The recording/reproducing unit further includes a chassis having mounting holes at the corners thereof. Each vibration absorbing part is respectively fitted to a periphery of one of such mounting holes.

Disk device having vibration absorbers for providing a small-height structure

A disk device includes a drive mechanism having at least a disk motor and an optical head, the disk motor rotating a recording disk, and the optical head accessing the disk to reproduce information from the disk and/or record information in the disk. A first printed circuit board controls the disk motor and the optical head of the drive mechanism, the first printed circuit board receiving signals from the optical head and/or sending signals to the optical head to perform the reproducing of information and/or the recording of information. The disk device further comprises a second printed circuit board electrically coupling the drive mechanism to the first printed circuit board, the second printed circuit board including a connector coupled to wire patterns of the signals received and/or sent by the first printed circuit board, and the connector being coupled to the first printed circuit board.

Disk device having a drive unit for providing a small-height structure

Disk device having a drive unit and a cam plate which moves up and down

Disc drive

Growing community of inventors

Yamagata, Japan

Atsushi Kirii