An integrally molded, one-piece running board is adapted for attachment to a motor vehicle. The inner race may define an inner circumference and may include a plurality of gear teeth around the inner circumference. The second wavelength conversion unit includes a ceramic containing, as a primary component, a pyrochlore-type compound represented by A2B2Ow2. After subsintering, the conductive thickfilm is etched to expose the conductor, and the conductor are then fired. Moreover, the communication wire wound around the pivotal shaft can be tightly positioned thereon without any positioning device. The thermistor body contains a perovskite phase of perovskite-type crystal structure represented by the composition formula: ABO3 where A is at least one A-site element and B is at least one B-site element.