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:
Mar. 16, 2004
Filed:
Oct. 05, 2001
Yasuhiko Tanaka, Saitama, JP;
Fuji Photo Optical Co., Ltd., Saitama, JP;
Abstract
A motor actuation device is constructed of a motor a reduction gear train and a detection mechanism. The reduction gear train includes a worm gear and a worm wheel. The worm gear is fixed to a rotary shaft of the motor and meshes with the worm wheel. The worm wheel transmits the rotation of the motor to the lens barrel to slide it along an optical axis. The detection mechanism includes a first spur gear, an idle gear, a second spur gear, an impeller and a photo interrupter. The first spur gear is molded with the worm gear integrally. The idle gear meshes with the first spur gear and the second spur gear. When the motor causes the rotation, a blade of the impeller passes in the photo interrupter and a pulse is generated from the photo interrupter.