ILLUMINATION SHEET MEMBER AND COVER MEMBER FOR CONTROL SWITCH

摘要

PROBLEM TO BE SOLVED: To provide an illumination sheet that easily secures more amount of light internally and optically guided, and that is easy to be made smaller and thinner. SOLUTION: The illumination sheet member 40 comprises: a light incident portion 41 through which light from a light source 11 enters; a light guide portion 43 for guiding the light incident from the light incident portion 41 through the interior; and a plurality of radiation portions 45 for radiating the light guided by the light guide portion 43. The light incident portion 41 comprises: a light incident surface 51 that closely adheres to the surface of the light guide portion 43 in a protruding condition and faces a light emitting surface 11a of the light source 11; and a light guide surface 53 that is provided to a light radiation portion 45 side rather than to the light incident surface 51 and is slanted to be progressively thinner from the light source 11 side towards the radiation portion 45 side. The light that enters the light incident surface 51 and reaches the light guide surface 53 is guided to the interior of the light guide portion 43 by the light guide surface 53. COPYRIGHT: (C)2009,JPO&INPIT