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. 26, 2019
Filed:
Feb. 15, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Ryo Abe, Tokyo, JP;
Mitsuhiro Izumi, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A driving device that is capable of suppressing enlargement of diameter when a movable amount of a moving part increases. The driving device drives a moving part that is movably supported by a fixing part in a predetermined direction. A drive unit has first and second actuators each of which includes a coil arranged in one of the fixing part and moving part and a magnet arranged in the other part so as to face the coil, and gives a thrust to drive the moving part. A control unit controls the drive unit by controlling electric currents supplied to the coils of the first and second actuators in response to results obtained by multiplying first and second coefficients that vary in response to the position of the moving part to first and second control values obtained from first and second functions based on the position of the moving part, respectively.