Charging device, process cartridge and image forming device

An image forming device, comprising at least:

• a process cartridge, having a charging unit therein, wherein the charging unit further comprises a conductive base as an innermost portion of the charging unit, and a single-layered resistant layer, an inner surface of said resistant layer in direct contact with an outer surface of the conductive base, an outer surface of said resistant layer in contact with an electrified body, and by applying a voltage to a conductive base, a charging process is performed in a contact charging manner, and wherein the single-layered resistant layer has a thickness equal or below 0.7 mm, and has a surface resistance between 1×103 (Ω/□) and 1×1015 (Ω/□).

A charging unit, used for an image forming device, comprising:

• a base as an innermost portion of the charging unit, whose surface is a good conductor;
• and
• a resistant member, an inner surface of said resistant member in direct contact with an outer surface of the base, wherein an outer surface of said resistant member keeps a sufficient small gap with an electrified body, and said outer surface of said resistant member is operatively arranged to charge a surface of the electrified body uniformly due to a discharge at the gap between said outer surface of said resistive member and said surface of said electrified body, said resistant member comprising a low friction material, said resistant member further comprising nylon.