Adjusting driving device having electrically-driven motor and transmission gear arranged rear of driving motor

PURPOSE: To provide a lightweight transmission gear having the considerably small number of constituent parts and capable of being manufactured at low cost. CONSTITUTION: A transmission gear 18 is provided with a casing constituted of many parts and manufactured of plastic, and plastic-made transmission gear parts 36, 56 for transmitting the adjusting movement are directly supported on the inner peripheral wall of the casing without arranging any special support element. COPYRIGHT: (C)1995,JPO