| 摘要 |
PURPOSE:To design a driving part compactly, by only controlling the turning- on/off of an electromagnetic clutch electrically to control freely the driving and the stop of a developing device. CONSTITUTION:An electromagnetic spring clutch unit Cl consists of a clutch shaft 30, an electromagnetic part 31 attached to one end of this shaft 30, a transmission gear G2 which is pressed into the other end to be made into one body together with the shaft 30, and a developing sleeve gear G1 which is fitted loosely to the shaft 30 between the electromagnetic part 31 and the transmission gear G2, and the tip part in the side of a transmission gear G3 of the clutch shaft 30 is inserted to the tip part of an outside projecting shaft 191 of a device box deep plate 5 of a developing sleeve unit, and the gear G2 is connected rotatably as one body by a pin 32. When power is supplied from the controlling system of a copying machine to the electromagnetic part 31, a clutch plate 311 is moved toward the developing sleeve gear G1 and is engaged with this gear G1, and the electromagnetic clutch unit Cl is made into one body through the gear G1, the clutch shaft 30, and the clutch plate 311. |
