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. 29, 2013
Filed:
May. 28, 2009
Applicants:
Shigeru Yamada, Gumma, JP;
Yasushi Takagi, Gumma, JP;
Inventors:
Shigeru Yamada, Gumma, JP;
Yasushi Takagi, Gumma, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H 9/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A key switch structure is provided whose waterproofing property is improved without affecting a contact of a membrane sheet. The upper surfaces of the membrane sheet, the embossed part and the circumferential bend part of a back plate are formed on one and the same plane, and a thermal sheet is welded to those upper surfaces. The thermal sheet comprises a thermally meltable, adhesive sheet, which will be heated and pressed with heat rollers to be welded to the upper surfaces. The back plate has an air vent hole formed in its bottom portion.