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:
May. 12, 2020
Filed:
May. 22, 2017
Nidec Copal Corporation, Tokyo, JP;
Kenta Kawakami, Tokyo, JP;
Ushio Uemura, Tokyo, JP;
Nidec Copal Corporation, Tokyo, JP;
Abstract
Provides a focal-plane shutter comprising: a base plate that has an opening portion for exposure; a blade group for opening and closing the opening portion; an arm that is linked to a blade group; and a driving mechanism portion, linked to the arm, for driving the blade group through the arm, wherein: the blade group and the arm are linked through a coupling plated with a metal crystallized structure with crystallization degree of no less than 99%. This focal-plane shutter can improve the wear durability of a coupling for linking a blade group and an arm. This can prevent the production of wear debris, and prevent the coupling from becoming brittle through wear, even given repeated operations.