| 摘要 |
PURPOSE:To prevent temperature rise over a regulated value of a charging battery and to prevent degradation of battery performance and shortening of service life by mounting a transformer integrally with a terminal block on the outer face of a lighting fixture thereby preventing direct transmission of heat from the transformer to the lighting fixture. CONSTITUTION:An emergency lighting fixture is normally fed with power from a power supply line and a charging battery 20 is charged by a charging circuit on a circuit board 26 through a transformer 7. A lamp 21 is not lighted under that state. The transformer 7 is heated upon power supply but since the transformer 7 is assembled integrally with a terminal block 5 and disposed on the outside of a lighting fixture l, heat is not transmitted directly from the transformer 7 to the lighting fixture 1 and thereby temperature rise is suppressed in the lighting fixture 1. Consequently, temperature rise of the charging battery 20, disposed in the lighting fixture 1, is suppressed within the regulated value thereof thus preventing degradation of performance or shortening of service life of the charging battery 20 due to heating of the transformer. |
