Abstract: A motor actuator has a housing, an output gearwheel rotated by a motor, a pattern board provided on one side of the output gearwheel, and a conducting unit. The conducting unit is formed integrally with brushes contacting the pattern board and connector pins corresponding to each of the brushes and electrically connecting the brushes to other electrical components. The brushes and connector pins are fixed by an insulating resin so as to maintain the structure when link portions unneeded for electrical connection are cut.

Abstract: A first conductive plate is formed integrally of a single conductive sheet comprising a plurality of brushes and power supply terminals that are partially short-circuited, and a second conductive plate is formed integrally of a single conductive sheet comprising connector pins for connection for other components that are partially short-circuited.

Abstract: A photoelectric detector for detecting the presence of an object which comprises at least a light ray projecting element, for example, of a luminescent diode and a light ray receiving photoelectric element, for example, of a photo transistor. The two elements are respectively received in bores formed in a housing in such a manner that only the light rays emitted by the projecting elements is received by the receiving element with any lights due to irregular reflection prevented from reaching the receiving element so as to avoid erroneous functioning of the detector.