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:
Jul. 11, 2000
Filed:
Nov. 17, 1999
Seiichi Suga, Fukushima-ken, JP;
Kazuhiro Yokoyama, Fukushima-ken, JP;
Kazutoshi Watanabe, Fukushima-ken, JP;
Tsuyoshi Narusawa, Fukushima-ken, JP;
Shinji Hirano, Fukushima-ken, JP;
Katsuyuki Katayama, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A keyboard is constructed so that a ratio of a dimension between a first latching portion of a first lever and a pivotally supporting portion thereof to a dimension between this pivotally supporting portion thereof and a second latching portion thereof is equal to a ratio of a dimension between a first latching portion of a second lever and another pivotally supporting portion thereof to a dimension between this pivotally supporting portion thereof and a second latching portion thereof. Thus, when the key top descends, the second latching portions of the first and second levers are placed outside the first latching portions of the first and second levers. Consequently, reduction in thickness of a keyboard is achieved.