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. 27, 2021
Filed:
Dec. 17, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Yoshiyuki Matsumoto, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A shutter unit includes a base plate, a first blade operation member movable integrally with the first blade member between a first movement completion position and a first movement start position, a second blade operation member movable integrally with the second blade member between a second movement completion position and a second movement start position, a first charge member configured to charge the first blade operation member from the first movement completion position to the first movement start position, and a second charge member configured to charge the second blade operation member from the second movement completion position to the second movement start position, wherein the first charge member and the second charge member include coaxially arranged cam gears and are configured to rotate in opposite directions.