DEVELOPING UNIT DRIVING MECHANISM OF COLOR IMAGE FORMING DEVICE

摘要

PURPOSE: To provide a space-saving and inexpensive developing unit driving means for a color image forming device without requiring a large mechanism rotating a developing unit holding base and without requiring an expensive drive transmitting/interrupting clutch such as an electromagnetic clutch. ;CONSTITUTION: Four developing units are arranged on the periphery of a photoreceptor drum 10, and a reversible development driving motor 71 and two sets of planetary gear mechanisms 80A, 80B are arranged so that their planetary gears 82A, 82B are selectively meshed with two sets of developing gears respectively when the developing units are driven, and a switching member 85 and a switching solenoid 76 selecting the actions of two sets of the planetary gear mechanisms are provided. When one of the planetary gear mechanisms 80A, 80B and one of the forward and reverse directions of the development driving motor 71 are selectively combined, one of the four developing units is selected and driven.;COPYRIGHT: (C)1995,JPO