| 摘要 |
PURPOSE:To prohibit unnecessary lighting of a room light to operate in linkage with a door switch by interrupting the energization thereof from a battery detecting the brightness in the surrounding area. CONSTITUTION:A solar battery 8 is excited during the daytime when it is bright in the surrounding area and the contact of a relay 6 is held open through a relay coil 6b and a relay mobile piece 6a. This allows no power to be fed to a room lamp 3 from the battery 1 thereby always keeping the room lamp 3 OFF while ignoring the setting of a room lamp switch 4 to a contact (c) or (b). |
