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:
Aug. 21, 2018
Filed:
Dec. 30, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Tadanori Okada, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A zoom lens barrel comprises: a focus lens frame moves in an optical axis direction (inOAD) during zooming and focusing; a focus cam ring (FCR) rotates to move focus lens frame inOAD; a key member rotates to transmit torque to FCR; a zoom lens frame moves inOAD along with FCR; a zoom cam ring rotates to move zoom lens frame inOAD; a first rotation transmission portion (RTP) provided to FCR; and a second RTP provided to key member to be engaged with first RTP, in which cam grooves formed on zoom cam ring are engaged with rollers provided to zoom lens frame, respectively, focus lens frame moves inOAD when FCR rotates with rotation of key member during focusing, and focus lens frame moves inOAD along with zoom lens frame when FCR rotates with relative position change of first and second RTPs inOAD during zooming.