Novel arc extinguishing bars piece and explosion chamber thereof

The utility model relates to a novel arc extinguishing bars piece and explosion chamber thereof, its arc extinguishing bars piece is a platellite, is equipped with cutting electric arc portion on it,its characterized in that: be provided with at least one curvature on the cutting electric arc width direction of portion, this curvature is concave or protruding, concave or protruding axis is parallel with the electric arc direction of motion. The utility model discloses a set up at least one concave or protruding curvature on the width direction of edge in the cutting electric arc portion of arc extinguishing bars piece for bars piece width direction's developed length increases, and just also increasing the surface area of adjacent bars piece increases bars piece quality promptly, can bearmore electric arc energy, also is exactly that heat capacity increases, thereby obtains the cooling electric arc effect better for traditional plate bars piece, finally promotes the breaking capacityof explosion chamber. 本实用新