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:
Aug. 14, 2001
Filed:
Jul. 25, 2000
Mitsuhiro Okada, Miyagi-ken, JP;
Hidetaka Sato, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A structure of a push-button switch is disclosed which can prevent the occurrence of a poor conduction caused by the influence of dust which has entered the switch and ensuring a stable contact reliability despite of adopting a contact structure which uses round wire rods. The push-button switch comprises a housing having a receptacle portion, a fixed terminal formed by a wire rod, embedded in the housing, and partially projecting to the exterior of the housing, a fixed contact integral with the fixed terminal and using as a contact portion a partially exposed, raised portion of the wire rod exposed to an inside bottom of the receptacle portion of the housing, and a dome-like movable contact accommodated in the receptacle portion and capable of moving into contact with and away from the fixed contact, wherein a groove is formed in an upper surface of the raised portion of the fixed contact so as to cross the raised portion transversely and/or longitudinally, and the thus grooved-upper surface of the raised portion comes into contact with the movable contact.