| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED lighting device with improved heat radiation efficiency in which LED elements are highly integrated to attain compactness, lightweightness, and a high illuminance.SOLUTION: This invention provides a high illuminance LED lighting device in which a through-pass port is arranged at a prescribed position of a circuit base plate having a plurality of LED elements 3 arranged in a laminate comprising a circuit board 10 having the plurality of LED elements 3 arranged in series, an insulation base plate 9 and a thermally conductive base plate 8, a thermally conductive column-like member 13 is inserted into the through-pass port, the LED elements 3 are mounted at a flat part protruded at the circuit base plate side of the column-like member, a plurality of LED lighting modules 4 formed with radiation fins 14 at the column-like member protruded at the thermally conductive base plate side are fixed in parallel with a module holding base plate 11 provided with fixing parts for the LED lighting modules so as to form an LED lighting unit 6, the radiation fins are inwardly installed at a cylindrical frame 2 provided with a fixing mechanism capable of fixing the plurality of LED lighting units, many LED elements are arranged at 360°, the radiation portions are arranged in the cylinder to improve the heat radiation efficiency due to a chimney effect and to attain high integration of LED elements. |
