Drive transmission mechanism that ensures extended service life in reduced size and image forming apparatus including the same

摘要

A drive transmission mechanism includes an electromagnetic clutch and a drive output gear. The electromagnetic clutch includes a clutch shaft, a clutch input gear, a clutch idler gear, and a clutch output gear. The drive transmission mechanism transmits driving power using a first drive transmission path or a second drive transmission path. The first drive transmission path includes the clutch idler gear, a first idler gear, and a first output gear unit to transmit driving power to a rotated member connected to a first output gear unit irrespective of the energizing or the non-energizing an electromagnetic clutch. The second drive transmission path includes the clutch output gear, a second idler gear, and a second output gear unit to transmit driving power to a rotated member connected to the second output gear unit only when the electromagnetic clutch is energized.