| 摘要 |
PURPOSE: A light emitting device for a street lamp is provided to discharge the heat generated in an LED rapidly by mounting a cooling fan between a second heat sink and a third heat sink. CONSTITUTION: A light emitting device includes an LED protective unit(42), a lens unit(21), first to third heat sinks(22,70,80), a coupling unit(90), and a PCB(44). The plurality of LEDs are arranged in the bottom of the LED protective unit. The lens unit is mounted on an upper side of the LED protective unit. The first to third heat sinks have a hollow cylinder shape. A plurality of uneven grooves are formed in an outer circumference of the first heat sink with a regular interval. A plurality of curved wings are formed in the outer circumference of the second heat sink and the third heat sink. The coupling unit is projected downwardly from the bottom of the third heat sink. An auxiliary unit is attached to the upper side of the PCB. |
