Patent ID: 7918572

Claim:
An indicator device comprising: a light emitting element configured for emission of light; and a light conducting plate comprising: a light incidence surface formed on a side face opposite to the light emitting element and configured for light from the light emitting element to strike thereon, a light output surface formed on another side face opposite to the side face and having a prescribed spaced position relative to the light incidence surface to be narrow in width and elongate in a direction perpendicular to an optical axis of the light emitting element and configured for light having income to outgo for a lighted indication; a V-form recess recessed to form with prescribed recess depths in one planer surface of two planer surfaces intersecting at right angles with the side face between the light incidence surface and the light output surface and configured for light from the light emitting element to be reflected in part, and a pair of side faces linking the side face to the another side face and formed to sandwich the optical axis therebetween and be inclined in a direction apart from each other as the pair of side faces extends from side face toward the another side face, wherein the V-form recess has a recess extremity constituting a single vertex thereof disposed in position on the optical axis of the light emitting element and nearer to the light incidence surface than other end parts thereof, wherein the recess depths become shallower as the V-form recess extends from the recess extremity, wherein the V-form recess is formed in a V-form defined with recess side walls as two sides thereof interconnecting the recess extremity and the other end parts, respectively, and wherein the recess side walls are configured for light from the light emitting element to be reflected in part such that the light reflected in part is reflected on the pair of side faces to reach the light output surface.