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, 2010
Filed:
Dec. 28, 2005
Yoshio Kenmochi, Tokyo, JP;
Yoshio Kenmochi, Tokyo, JP;
Sunarrow Limited, Tokyo, JP;
Abstract
Mobile phones are in a trend of having thinner configuration due to emphasis on the design. Thus, in order to meet this demand, the present invention aims to thin the key sheet portion as much as possible. A thin key sheet and a thin key unit incorporating the thin key sheet are configured by providing on its surface a key topmade of a metal or a resin with indications such as letters, symbols, graphics or the like indicating the functions of keys are formed on the front surface or the back surface thereof, and switch elementsfor turning ON/OFF of an electric circuit by the pressing of the key top, together with a printed circuit boardon which a circuit pattern involved therewith is formed; and by adhering and fixing the key topand the printed circuit boardtogether via a cushion gaskethaving appropriate elasticity and a filler layerdisposed between the key top and the printed circuit board.