Patent ID: 8436375

Claim:
A light illuminating device comprising a lengthy LED board on which multiple LEDs are loaded, a housing that has an accommodating concave part to house the LED board, a heat conductive member that is arranged between a back surface of the LED board and a bottom surface of the accommodating concave part, a pressing member that has multiple lens parts corresponding to each of the multiple LEDs and that presses a long side edge part of the LED board against the bottom surface of the accommodating concave part of the housing, a securing mechanism for securing the LED board, the heat conductive member and the pressing member to the housing, and a positioning mechanism for positioning the multiple lens parts relative to the multiple LEDs, wherein the securing mechanism comprises a first surface that is arranged on either one of the housing and the pressing member and that faces a bottom surface side of the accommodating concave part and a second surface that is arranged on the other of the housing and the pressing member and that makes an abutting contact with the first surface and faces an opening side of the accommodating concave part, the positioning mechanism comprises a convex part that is arranged on either one of the LED board and the pressing member and a concave part that is arranged on the other of the LED board and the pressing member and that fits over the convex part, and each of the multiple lens parts is positioned for each of the multiple LEDs respectively by making the first surface of the securing mechanism an abutting contact with the second surface of the securing mechanism and by fittingly inserting the convex part of the positioning mechanism into the concave part of the positioning mechanism in a state that the pressing member presses the long side edge part of the LED board so that the back surface of the LED board tightly contacts the heat conductive member.