DRIVING ASSEMBLY FOR PHOTOSENSITIVE DRUM, PHOTOSENSITIVE DRUM ASSEMBLY, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

摘要

PURPOSE: A driving assembly for a photosensitive drum, a photosensitive drum assembly, a process cartridge, and an image generating device are provided to prevent the abrasion of a protrusion receiving a driving force from the image generating device. CONSTITUTION: An image generating device includes a driving assembly for a photosensitive drum, a photosensitive drum assembly, and a process cartridge. The driving assembly has multiple engaging protrusions. The number of the engaging protrusions is n, and the engaging protrusion is inserted into a twisted hole at a driving shaft. The number of the engaging protrusions corresponds to the number of the twisted holes. The number of the edges of the engaging protrusion is above or below the number of the edges of the twisted hole. The engaging protrusion comprises a coupling protrusion and a supporting protrusion. When the engaging protrusion is inserted into the twisted hole and is coupled to the driving shaft, the coupling protrusion is inserted into the edge portion of the twisted hole. [Reference numerals] (AA,BB,EE) Contact (concavo-convex unit); (CC) Cross section A:A ratio 5:1; (DD) Contact; (FF) Cross section B:B ratio 5:1