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:
Apr. 24, 2012
Filed:
May. 30, 2008
Ryohei Shigematsu, Yokohama, JP;
Hiroshi Imamura, Yokohama, JP;
Takafumi Hirata, Yokohama, JP;
NHK Spring Co., Ltd., Yokohama-shi, JP;
Abstract
For realizing widening of a light scanning angle and excellent durability, the optical scanning actuator includes a movable unit that supports an optical element, a plurality of leaf springs having a thin plate shape with one end portion being fixed and another end portion being attached to the movable unit, and an electromagnetic driving unit including a magnet, a yoke laminated on the magnet to form a closed magnetic circuit together with the magnet, and a coil held by the movable unit. The coil is positioned in a gap between the magnet and the yoke such that opening plane of the coil is substantially orthogonal to a laminating direction of the magnet and the yoke. The movable unit is driven by an electromagnetic force applied to the coil.