ELECTRIC DEVICE

PURPOSE:To reduce influence of electromagnetic noise to a circuit which is provided within a case and to achieve improved appearance by providing an inner door surrounding a source generating electromagnetic wave along with the inner case penetrating through the inner case when an opening can be closed and is in closed state. CONSTITUTION:When replacing a lamp 17 by a new one, an inner door 34 can also be opened by opening an opening/closing door 24. Then, when the replacement is completed and the opening/closing door 24 is closed, the inner door 34 closes an opening part 31 simultaneously. When the inner door 34 is closed, it contacts an inner case 27, thus enabling the inner door 34 and the inner case 27 to conduct electrically. In this state, electromagnetic wave noise emitted from a lighting diagnosis lamp 17 is grounded to a case 16 through the inner door 34 and a pin 33 or directly from the inner case 27 without affecting other electrical equipment. Also, since the inner door 34, etc., is hidden within the case 16 while in use, appearance is not damaged.