Patent ID: 9508509
Filing Date: 2016-11-29
CPC Classification: H01H

Claim Text:
1. A contact device, comprising: a pair of fixed contacts fixedly disposed inside an arc extinguishing chamber and maintaining a predetermined interval from each other; a movable contact disposed to be contacting to and separating from the pair of fixed contacts; a pair of arc extinguishing permanent magnets sandwiching the movable contact along a longitudinal direction thereof for extending an arc in a direction perpendicular to a moving direction of the movable contact relative to the fixed contact; and an arc root movement promotion portion formed on the movable contact to promote a movement of root of arc in a direction away from the pair of fixed contacts, the root of arc being generated when the movable contact is opened and separates from the pair of fixed contacts, wherein the arc root movement promotion portion includes a pair of arc runners provided on two side surfaces of the movable contact extending in the longitudinal direction of the movable contact and protruding in a direction away from the pair of fixed contacts.