Patent Number: 6,426,924

Title: Apparatus for recording and/or reproducing information and/or from opticalinformation record disk

Abstract: An apparatus for recording and/or reproducing information on and/or from amagneto-optical disk including an optical head for projecting a laser beamonto a magneto-optical disk and receiving the laser beam reflected by thedisk, an up-down block arranged movably between a lower position and anupper position, an up-down motor for moving said up-down block up anddown, a turntable for supporting the disk and a spindle motor secured tosaid up-down block and having a driving shaft coupled with said turntablefor rotating the turntable, a position detecting device for detecting aposition of said up-down block to derive a position signal when theup-down block is driven into the upper position, a rotation detectingdevice for detecting a rotation of said optical information record disk toderive a rotation signal when the optical information record disk isrotated at a predetermined revolving speed, and a control device forinitiating a focus control for moving said objective lens and turntablerelative to each other in accordance with said position signal androtation signal.

Inventors: Yamamiya; Kunio (Sagamihara, JP)

Assignee:

International Classification: G11B 7/00 (20060101); G11B 007/00 ()

Expiration Date: 07/30/2014