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:
Oct. 14, 2003
Filed:
Jul. 24, 2000
Motoaki Mushika, Higashiosaka, JP;
Hiroyuki Konishi, Higashiosaka, JP;
Sanyo Electric Co., LTD, Osaka, JP;
Abstract
A key input device comprises a dome sheet provided over a base plate and having a plurality of dome portions, and a plurality of manual keys disposed above the dome sheet for depressing the respective dome portions. Each of the dome portions is elastically restorably inverted by being depressed by the corresponding manual key to close contacts. The dome sheet has a flat sheet portion formed around the dome portions and comprising an inner region extending inwardly of dome portions to be selectively depressed by a seesaw key , and an outer region extending outwardly of the dome portion . A spacer sheet is interposed between the base plate and the dome sheet to thereby position the inner region of the flat sheet portion of the dome sheet at a lower level than the outer region . Accordingly, key contacts can be reliably closed by the seesaw key