| 摘要 |
The present invention is intended to fix a rod lens to a casing and not only prevent looseness thereof but also facilitate an assembling work, and includes: a casing 2 having a bottom wall part 21 and a pair of side wall parts 22, 23 extending upward from this bottom wall part 21; a rod-shaped lens 4 provided above an LED substrate 3 and along a longitudinal direction inside the casing 2; and a fixing mechanism 5 for fixing the lens 4 to the pair of side wall parts 22, 23, wherein the fixing mechanism 5 includes: an upward surface 51a provided along the longitudinal direction in an inner surface of the side wall parts 22, 23; a downward surface 52a provided along the longitudinal direction in a side peripheral surface of the lens 4; a concave groove 53 provided along the longitudinal direction above the upward surface 51a in the inner surface of each of the side wall parts 22, 23; and an elastic body 54 fitting into the concave groove 53 to be in contact with the side peripheral surface of the lens 4 in a state that the downward surface 52a is in contact with the upward surface 51a. |
