Line light irradiation device and manufacturing method thereof

摘要

The present invention includes: a casing having a bottom wall part and a pair of side wall parts extending upward from this bottom wall part; a rod-shaped lens provided above an LED substrate and along a longitudinal direction inside the casing; and a fixing mechanism for fixing the lens to the pair of side wall parts. The fixing mechanism includes: upwardly facing surfaces longitudinally extending along an inner surface of the side wall parts; downwardly facing surfaces longitudinally extending along side peripheral surfaces of the lens; a concave groove longitudinally extending above the upwardly facing surface on the inner surface of each of the side wall parts; and elastic bodies fitting into the concave grooves to be in contact with the side peripheral surfaces of the lens in a state that the downwardly facing surfaces are in contact with the upwardly facing surfaces.

主权项

1. A line light irradiation device comprising:
an integrally molded casing having a bottom wall part extending in a longitudinal direction and a pair of side wall parts extending upward from both sides in the longitudinal direction of the bottom wall part; an LED substrate provided on the bottom wall part of the casing; a rod-shaped lens provided above the LED substrate along the longitudinal direction inside the casing; and a fixing mechanism for fixing the lens to the pair of side wall parts, wherein the fixing mechanism comprises: a respective upwardly facing surface extending in the longitudinal direction along an inner surface of each of the side wall parts; a respective downwardly facing surface extending in the longitudinal direction along each side peripheral surface of the lens; a respective concave groove extending along the longitudinal direction above the upwardly facing surface on the inner surface of each of the side wall parts; and a respective elastic body detachably provided in each concave groove and fitting into each concave groove to be in contact with a corresponding side peripheral surface of the lens in a state that the downwardly facing surfaces are in contact with the upwardly facing surfaces to thereby press the downwardly facing surfaces against the upwardly facing surfaces.