| 摘要 |
PURPOSE:To easily prevent malfunction of a light receiving element by realizing an aperture means between the light receiving element and a light emitting element with a rough surface adopted for a rear side or a front side of a light transmission member covering the light receiving element. CONSTITUTION:At least one of front and rear sides of a light transmission member 24 except at least a part opposite to light receiving elements 26a-26g covering the light receiving elements 26a-26g provided to one part of a main body equipment is formed to be a rough surface. Thus, the light from light emitting elements 16a-16g provided to other part of the main body equipment is received by the light receiving elements 26a-26g through the opposite light transmission member 24 and the light from the light emitting elements 16a-16g not opposite thereto is sufficiently attenuated. Thus, malfunction is prevented. |
