| 摘要 |
PURPOSE:To provide a lighting device which is not loosened even when it is applied to an appliance that involves vibrations. CONSTITUTION:A plurality of projections 7 are provided at the bottoms of a male threaded part 3 formed on the base 2 of an LED lamp 1 in such a way as discreted over a circumference, and a reverse rotation preventing means consisting of an edge reverse rotation preventing means formed split in the circumferential direction and a bottom preventing means formed so that the length in the axial direction is shorter than the male threaded part 3 is provided in a receptacle member of socket which is equipped with female threads. The reverse rotation preventing means prevents each projection 7 which has passed it from rotating reversely. |
