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. 23, 2004
Filed:
Jul. 19, 2002
Nidec Copal Corporation, Tokyo, JP;
Abstract
An electromagnetic actuator applied to a camera shutter device includes a rotatable disk-shaped rotor ( ) magnetized with different polarities and having an output portion ( ), a first plate-like yoke ( ) with a first magnetic pole part ( ) opposed to the outer peripheral surface of the rotor ( ) and a second plate-like yoke ( ) with a second magnetic pole part ( ) opposed to the outer peripheral surface of the rotor ( ), and a first coil ( ) and a second coil ( ) wound around the joint areas of the yokes so that the first and second coils become flat in the same direction as the first yoke ( ) and the second yoke ( ). By virtue of this configuration, the electromagnetic actuator can be thinned. Furthermore, the camera shutter device using this electromagnetic actuator and thus the camera can be thinned and miniaturized.