Contact mechanism and electromagnetic contactor using the same

摘要

A contact mechanism where a shape of at least one of a fixed contactor including a pair of fixed contact portions and a movable contactor including a pair of movable contact portions capable of contacting with and separating from the pair of fixed contact portions is set to a shape that generates a Lorentz force resisting electromagnetic repulsion in a contactor opening direction generated between the fixed contact portions and the movable contact portions when a current is applied, has the fixed contactor and the movable contactor being inserted in a current path. Magnetic bodies are disposed on at least one of the fixed contactor and the movable contactor for suppressing a force driving arcs, which are generated between the pair of fixed contact portions and the pair of movable contact portions, to the fixed contactor on the opposite side.

主权项

1. A contact mechanism where a shape of at least one of a fixed contactor including a pair of fixed contact portions and a movable contactor including a pair of movable contact portions capable of contacting with and separating from the pair of fixed contact portions is set to a shape that generates a Lorentz force resisting electromagnetic repulsion in a contactor opening direction generated between the fixed contact portions and the movable contact portions when a current is applied, the fixed contactor and the movable contactor being inserted in a current path,
wherein the fixed contactor further comprises a pair of conductive plate portions each including: a first conductive plate portion supporting the fixed contact portion and extending in parallel outwardly toward an end portion of the movable contactor, a second conductive plate portion extending from an outer end portion of the first conductive plate portion passing an outer side of the end portion of the movable contactor, and a third conductive plate portion extending inwardly from an end portion of the second conductive plate portion in parallel with the movable contactor to form a C-shape, wherein the movable contactor further comprises a conductive plate disposed between the first conductive plate portions and the third conductive plate portions of the pair of conductive plate portions, the movable contact portions are disposed on a surface of two end portions of the conductive plate, respectively, and wherein magnetic bodies are disposed on at least one of the fixed contactor and the movable contactor for suppressing a force driving arcs, which are generated between the pair of fixed contact portions and the pair of movable contact portions, to the fixed contactor on an opposite side, the magnetic bodies are disposed to cover at least portions of the second conductive plate portions facing the fixed contact portions.