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:
Sep. 07, 2021
Filed:
Oct. 09, 2019
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Hiroyasu Fujinaka, Osaka, JP;
Abstract
There is provided a lens barrel in which is mounted an actuator of a larger size than in a lens barrel of the same size, and with which a lens having a larger mass can be driven. A lens barrelcomprises a linear actuatorthat is disposed more to the outer peripheral side than the outer peripheral surface of a focus lens unit, and has two permanent magnets, a yoke unit, and a coil; and the focus lens unitthat holds a focus lensand is driven back and forth along the optical axis direction. The permanent magnetsare disposed substantially in parallel and spaced apart, with the same poles facing each other. The yoke unit includes a center yoke portion, a back yoke portion, and a yokethat magnetically couples the center yoke portionand the back yoke portion. The coilis wound around the center yoke portion, and its center is offset from the center of the two permanent magnetsto the outer peripheral side with respect to the optical axis center of the focus lens