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:
Feb. 17, 2015
Filed:
Jul. 05, 2012
Shigeru Yamada, Gunma, JP;
Shigeru Yamada, Gunma, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A key switch structure can include a key top, a link structure, a back plate, a membrane sheet, an elastic member, an arm bar, and a pushing member. The link structure can guide the key top in the pushing direction while the key top is pushed. The back plate can support the link structure. The membrane sheet can include a contact portion arranged on the membrane sheet and connectable, in response to a predetermined pressure, to an electrical contact to form a closed circuit. The elastic member can push and separate the key top from the back plate, and be elastically deformable. The arm bar can movably support the key top, and the arm bar can be supported movably at the back plate. The pushing member can push the link structure while the key top is pushed.