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:
Jan. 18, 2005
Filed:
Jan. 21, 2004
Junji Tsuchiya, Miyagi-ken, JP;
Koji Dono, Miyagi-ken, JP;
Junji Tsuchiya, Miyagi-ken, JP;
Koji Dono, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A switch device that prevents a contact failure from occurring between electrode contact points by having a self-cleaning function is provided. When a key topis pushed downward, a portion between a winding start endand a winding terminal endof a spiral contactoris extended by an operation partB provided in an actuator. At this time, the winding start endslides along the surface of a stationary electrode. As a result, dusts or stains attached to the winding terminal endand/or the stationary electrode, oxide films formed on the surfaces of the electrodes, etc., is self-cleaned. Therefore, it is possible to solve a contact failure problem between the movable electrodeand the stationary electrode