| 摘要 |
PURPOSE:To enhance reliability by increasing the heat dissipation of a built-in emergency battery and enhance the workability by improving the weight balance of the whole of a fixture. CONSTITUTION:Emergency batteries 5 are separately arranged at such positions as corresponding to the lengthwise center of a fixture body 1 farthest from the lamp filament sections of fluorescent lamps 7 as heat generating bodies, and to both sides the body 1 in a breadthwise direction. Also, a normal lighting device 3 and an emergency lighting device 4 are arranged in series at such positions as corresponding to the breadthwise center of the body 1 and near the lengthwise center along a lengthwise direction. Furthermore, the cross sectional area of a reflector 2 along a breadthwise direction is formed to be corrugated, so as to be high at a position corresponding to the lamps 7 and low at a position corresponding to each emergency battery 5 at both sides of each lamp 7, and to each of the lighting devices 3 and 4. |
