LED ILLUMINATION DEVICE FOR OPTICAL INFORMATION READING DEVICE

PROBLEM TO BE SOLVED: To enhance flexibility of illumination.SOLUTION: In a ring type external illumination unit 4, an LED substrate 77 and a circuit board 78 are housed inside an outer case composed of a ring-shaped cylindrical front case 75 and a rear case 76 in a state of being laminated while sandwiching a first spacer. A plurality of LEDs 80 for illumination are mounted on the LED substrate 77 having a substantially same size as a ring-shaped cross section of the front case 75. On the circuit board 78, an LED driving circuit, a CPU that controls lighting of the plurality of LEDs 80 mounted on the external illumination unit 4 and controls communication with a bar code reader 2, and a memory M are mounted.