DEVELOPER CARRIER, DEVELOPING APPARATUS, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS

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PROBLEM TO BE SOLVED : To provide a developer carrier increasing magnetic polarity of a magnet roller with a small diameter and having excellent rigidity.SOLUTION : The image forming apparatus is provided with a developing sleeve 5 and the magnet roller 6 installed in the developing sleeve 5. The magnet roller 6 is provided with a cylindrical shaped roller main body 61 and a shaft 63 which is integrally formed with both ends of the roller main body part 61 in a developer carrier 4 to which a rare earth magnet block 65 is installed in a recessed groove 64 extending in the axial direction on an outer periphery surface of the magnet roller 6. In addition, the roller main body part 61 is provided with four rod-like reinforcing members 66 extending in the axial direction inside.COPYRIGHT : (C)2008, JPO&INPIT