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:
Feb. 07, 1995
Filed:
Jun. 30, 1993
Hideo Yamasaki, Yokohama, JP;
Makoto Nagasato, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In an optical head which comprises a focusing unit section for moving an objective lens, used to focus a light beam on a recording medium, in a direction perpendicular to the recording medium, and a tracking unit section for moving the focusing unit section in a direction perpendicular to an information track on the recording medium, a lens holder for supporting the objective lens is fixed to two leaf springs, and a carriage body is disposed between the two leaf springs. The leaf springs and the central portion of a tracking coil are fixed to the carriage body. The tracking coil has stepped portions at its central portion, and its whole structure except the central portion is flat.