Switch device having self-cleaning function
AssigneeAlps Electric Co., Ltd.
InventorsJunji Tsuchiya, Koji Dono
Life of this patent
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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 top 4 is pushed downward, a portion between a winding start end 7b and a winding terminal end 7c of a spiral contactor 7 is extended by an operation part 3B provided in an actuator 3. At this time, the winding start end 7c slides along the surface of a stationary electrode 5. As a result, dusts or stains attached to the winding terminal end 7c and/or the stationary electrode 5, 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 electrode 6 and the stationary electrode 5.
Claims4
A switch device having a movable electrode, a counter electrode provided to face the movable electrode, and an operating member that pushes at least the movable electrode to bring the movable electrode into contact with the counter electrode,
- wherein the movable electrode comprises an elastic deformation part that is extensibly deformed in a direction approaching the counter electrode and a sliding contact point that slides along the surface of the counter electrode when contacting the counter electrode.
Dependencies are inferred from the claim text.