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. 17, 2007
Filed:
Sep. 11, 2003
Masahiro Kaizu, Chiba, JP;
Tadanori Ominato, Chiba, JP;
Koji Hirai, Chiba, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
The present invention provides a key switch diaphragm capable of obtaining a good click feeling and capable of avoiding contact failure and having a high durability. A key switch diaphragmcomprises a thin plate having flexibility and conductivity, and the key switch diaphragmincludes a truncated pedestal, and a spherical domical portionbeing raised toward an upper portion of the pedestalon the side of the upper portion of the pedestal. The domical portionis provided at its substantially central portion with an outwardly raised portionbeing raised toward an outer surface of the domical portion. An edge of the outwardly raised portionon the side of its inner surface forms a contact