Drive transmission for photosensitive drum of electrophotographic copier - has drum gearwheel arranged at one end of drum shaft for transmitting movement of drive gear wheel of motor and second drum gear wheel

摘要

The second (28c) of two drum gear wheels (28a,28c) is arranged at the other of end of the other end of the shaft of the drum (28). A first transmission unit (70) is connected with the first drum gear wheel (28a), and a second transmission unit (60) is connected with the second drum gear wheel (28c). The transmission units give a uniform distribution of the torque of the drive gears. The first transmission unit has a first magnetic roller gear wheel (27a) of a magnetic roller (27b) of a developer unit (27). This gear wheel meshes with the first drum gear wheel (28a), a developer drive unit, a first idle gear wheel (52) and an intermediate drive unit. This connects a first magnetic roller gear wheel (27a) with the developer drive unit and the idle gear wheel. ADVANTAGE - Drive torque is distributed evenly over drum, so that gap between drum and developer roller is stable.