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. 23, 2002
Filed:
Apr. 13, 2001
Junichi Maruyama, Tokyo, JP;
Takashi Terada, Tokyo, JP;
Hitoshi Ohkubo, Tokyo, JP;
Kazutoshi Hayashi, Tokyo, JP;
Fujitsu Takamisawa Component Ltd., Tokyo, JP;
Abstract
A key switch includes a base, a key top arranged above the base, a pair of link members interlocked to each other to support the key top above the base and direct the key top in a vertical direction, and a switching mechanism capable of opening and closing an electric circuit in connection with a vertical movement of the key top. Each of the link members includes an engagable end region engaged with the key top. The base includes an inner peripheral surface defining an opening capable of receiving the link members. The base is provided on the inner peripheral surface with protruding wall parts located at positions respectively facing oppositely to the engagable end regions of the link members. Each protruding wall part serves to locally reduce a clearance defined between the inner peripheral surface and the engagable region of each link member when the link member is received in the opening.