| 摘要 |
PURPOSE:To provide a compact self-ballasted fluorescent lamp device in which a molding mold has simple structure and the inclination or shaking of a base fixed to a cylindrical part is prevented. CONSTITUTION:In a compact self-ballasted fluorescent lamp device in which a screw base 3 is screwed in a cylindrical part 2 formed in a synthetic resin cover 1, three or more projections 21a-21f are formed on the outer circumferential surface of the cylindrical part, and arranged so that the projections form a vertical screw thread having the length of one turn or more when these projections are connected. These projections are arranged separately each other in a circumferential direction, and slits 22a-22f which are continued to the projections, extended toward the root of the cylindrical part, have the opened extended end, and are opened on the inner surface and the outer surface of the cylindrical part are formed. Since the base fixed to the cylindrical part is locked to three or more projections separated each other, inclination or shaking of the base is prevented. |
