Photosensitive medium supporting apparatus, developing cartridge and image forming apparatus having the same and method to assemble and disassemble a developing cartridge

摘要

A photosensitive medium supporting apparatus includes a supporting shaft (10,120) to rotatably support a photosensitive medium (3,110) and to have a fixing groove (11,121) or a fixing projection formed at one portion of the supporting shaft that projects from one end of the photosensitive medium, a first shaft supporting member (21) to support the one portion of the supporting shaft that projects from one end of the photosensitive medium and to have a fixing projection or a fixing groove that is inserted into the fixing groove or the fixing projection of the supporting shaft, and a second shaft supporting member (22) to support an other portion of the supporting shaft that projects from the other end of the photosensitive medium.