Charging device, process cartridge and image forming apparatus.

摘要

A charging device includes a movable member to be charged having a surface charge injection layer with a volume resistivity of 1x10<1><0> - 1x10<1><4> OMEGA cm; a charging member for charging the member to be charged, the charging member including movable charging brush contactable with the member to be charged and supplied with a voltage; and wherein N(Vb-Vk)/Vk >/= 4, where Vk (mm/sec) is a movement speed of the surface of the member to be charged, Vb (mm/sec) is a movement speed of an outer peripheral of the charging brush, and N (mm) is a contact width between the member to be charged and the charging brush, measured in a movement direction of the member to be charged. <IMAGE>