Cup-shaped heat dissipation member applicable in electric-powered light emitting unit

A cup-shaped heat dissipation member applicable in electric-powered light emitting unit, wherein the cup-shaped structure formed in the heat dissipater (100) opposite to the installation location of the electric luminous body (200) is formed with a single annular groove structure, and it mainly consists of:

• heat dissipater (100):
• formed as a circular, oval or polygonal cup-shaped or cup-like structure, made of materials having great heat conductivity and heat dissipation property such as aluminum, copper and ceramic, integrally formed or assembled by plural pieces;
• including parallel or conical or reverse-conical cup body contours;
• wherein one surface of the heat dissipater (100) is installed with the electric luminous body (200), and the other surface of the heat dissipater (100) is formed with the single annular groove (104) and a tubular central column (103) having a through hole (113);
• the surface of one or both of the cup periphery and/or the inner annular surface of the heat dissipater (100) is formed as a planar or wavelike structure or formed as a structure having heat dissipation fins;
• the outer and/or inner surface of the cup-shaped heat dissipater is served for accommodating the electric luminous body (200).