| 摘要 |
PROBLEM TO BE SOLVED: To enable contact of an electrode terminal of a base to an electrode contactor of a lamp socket or to release its contact in a state a ground terminal of the base is in contact with a ground contactor of the lamp socket.SOLUTION: A base part 50 is installed on a single base type lamp 40. The base part 50 has a base body, two electrode terminals 53, and two ground terminals 54. The electrode terminals 53 are pins projecting from one end face of the base body, and are in contact with the socket body 21 electrically, when the base part 50 is installed on the socket body 21 of the lamp socket. The ground terminals 54 are pins projecting longer than the electrode terminals 53 from the same end face as the electrode terminals 53 of the base body, and contact electrically the socket body 21 earlier than the electrode terminals 53, when the base part 50 is installed on the socket body 21. |
