Rubber and metal composite electric contact and preparation method therefor

A rubber and metal composite electric contact, wherein the electric contact is a circular layered complex which is formed by tightly combining a metal sheet layer having a plurality of through holes and a rubber layer by means of thermal vulcanization molding and which has a diameter of 1 mm to 15 mm, wherein the metal sheet layer has a thickness of 0.005 mm to 0.5 mm, the layered complex has a thickness of 0.1 mm to 5 mm, and an outer surface of the rubber layer has cylindrical, pillar-shaped, prismatic or hemispherical convexes with diameters of cross-sectional circumcircles less than or equaling to 1 mm and heights of 0 mm to 4.75 mm;

• the metal sheet layer and the rubber layer are combined firmly, and there is no isolation layer or transition layer between the rubber layer and the metal layer;
• the through holes in the metal sheet layer are filled with the rubber but the rubber does not protrude from an outer surface of the metal sheet layer;
• and no rubber is adhered to the outer surface of the metal sheet layer, therefore, there is no problem of rubber overflow.