The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2008
Filed:
Apr. 18, 2006
Ryuuji Hayashi, Daito, JP;
Nobuyuki Okazaki, Daito, JP;
Ryuuji Hayashi, Daito, JP;
Nobuyuki Okazaki, Daito, JP;
Funai Electric Co., Ltd., Osaka, JP;
Abstract
An optical pickup device is provided that permits, with an inexpensive construction, adjustment of the parallelism of a pair of guide rods for guiding an optical head relative to a recording surface of an optical disc. The guide rodsreceive, from twist coil springsfitted to a chassis, an elastic restoring force and are thereby loaded with a force that tends to move the guide rodsaway from the recording surface of the optical disc. At a position close to each of at least three of a total of four endsof the guide rodsan adjustment screwis fitted to the chassis by being screw-engaged into a nutso as to, when rotated, move close to and away from the recording surface of the optical disc. The position in which the guide rodsremain loaded with the force is determined as a result of the outer circumference of the guide rodsat the at least three endsthereof making contact with a flat inner end faceon the head portionof each of the adjustment screws