ATTACHING/DETACHING MECHANISM OF PHOTOSENSITIVE DRUM UNIT, PHOTOSENSITIVE DRUM UNIT, PROCESS CARTRIDGE, AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an attaching/detaching mechanism of photosensitive drum unit that prevents an excessive thrust load from being exerted to an output shaft of a speed reduction mechanism and a driving shaft of a photosensitive drum resulting in destruction of a coupling section or the speed reduction mechanism itself without impairing driving stability of the photosensitive drum when coupling the output shaft of the speed reduction mechanism and the driving shaft of the photosensitive drum during exchange work of the photosensitive drum.

SOLUTION: A drum driving shaft 111 is provided with an external tooth gear to be connected to an output shaft 179 of a photoreceptor driving unit 160 and a tapered serration 114 of external teeth to be engaged with a photoreceptor flange 121. Consequently it is configured that coupling connection/disconnection of the coupling section and engagement/disengagement of the engagement section are conducted substantially simultaneously. After completion of mounting of a photoreceptor unit case 130 to a case mounting position, the drum driving shaft 111 and the photoreceptor driving unit 160 are connected.

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