Patent attributes
A design part 20 is attached to an aperture 12 provided in an interior material 11 of a automobile, and a functional part 30 is arranged at the rear side of the interior material 11 supported by the design part 20. A switching unit 32 feeding and cutting an electric power to a light source 31 is configured as a separate body attached to a functional main body 30a in such a manner that switch units 32 of different mechanisms can be selectively attached to the functional main body 30a. Thus, since the functional main body 30a is used in common even when the switching unit 32 is changed and has a general-purpose nature, cost reduction can be attained.