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. 16, 2002
Filed:
Feb. 28, 2000
Hirofumi Sato, Gifu, JP;
Isao Mochizuki, Gifu, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A key switch is configured such that each of a first cam portion of a first link member and a second cam portion of a second link member is provided with first and second cam surfaces and a cam apex Plate springs are integrally provided in the first and second cam portions respectively. When a key top is depressed, the urging force of the plate springs causes the first cam surfaces of both the first and second cam portions to come into contact with each other. Thus the key top is securely held in the depressed position. When key top is pressed the second cam surfaces of the first and second cam portions come into contact with each other while the upward movement of the first and second link members is retained based on the urging force of the plate springs causing the elastic resinous pieces A, A to perform a switching operation.