Pioneer Electronic Corporation

Masao Abe

Shigeharu Furusawa

Isami Kenmotsu

Tadashi Funabashi

Nobuyuki Isobe

Masakazu Yamashita

Tomohiro Mizuno

Yasuhiko Seto

Toshiyasu Iida

Kenjirou Ooizumi

Hidekatsu Miyasaka

An upper clamping device and a lower clamping device are provided for clamping a double-sided optical disc in cooperation with the upper clamping device. An annular holder is axially movably provided in the upper clamping device. A plurality of spheres are radially movably mounted on the holder. A hub having a slant at a periphery thereof is axially movably provided. When the hub is downwardly moved the slant urges the spheres to engage them with an inside wall of a center hole of the optical disc. Thus, the optical disc is centered.

Centering device of an optical disc player

Four compact disks (CDs) and one laser disk (LD) are placed in a tray having a plurality of disk receiving sections and moved through a disk supplying opening into a disk player housing. In accordance with the desired input to the disk player, a disk holder is directed to a desired disk receiving position via a swinging arm device which supports the disk holder and places the desired disk in the disk playing position.

Disk player wherein a plurality of compact disks and a laser disk are

A double-side playing optical disk player which plays both sides of a disk placed on a turntable by driving and guiding a carriage carrying an optical pickup with a guide driving mechanism along both surfaces of the disk. The guide driving mechanism is composed of first and second guide mechanisms disposed on respective sides of the disk-carrying surface of the turntable, and a transfer mechanism for transferring the carriage between prescribed engaging/disengaging positions on the front and rear sides of the disk.

Double-side playing optical disk player

Growing community of inventors

Saitama, Japan

Masao Abe