PURPOSE: To prevent faulty electrification caused by the soil of an electrifying member and the occurrence of faulty image caused by the faulty electrification in an oscillating voltage impressing system and an electrifying member-fixing type electrifying device, and an image forming device and a process cartridge in which the electrifying device is used.
CONSTITUTION: The electrifying member 2 is provided with electrifying member parts 2a to 2c on respectively independent plural discharge areas in a direction where the surface of a body to be electrified moves, a voltage impressed on the electrifying member part 2a in the discharge area on an upstream side in the direction where the surface of the body to be electrified moves is an oscillating voltage, a voltage impressed on the electrifying member parts 2b and 2c in the discharge area on the downstream side from the part 2a is a DC voltage, and VD-DC1≤Vth, and VD-DC2≤Vth are satisfied in the case where the discharge starting voltage of the body 1 to be electrified is Vth, the final surface potential of the body to be electrified is VD, the DC voltage respectively impressed on the electrifying member parts 2b and 2c on at least two discharge areas on the downstream side are DC1, DC2 (DC1<VD<DC2).
FUNABASHI EIJI
YAMAUCHI KAZUMI
OGATA HIROAKI
YAMAZAKI MICHIHITO
KISU HIROKI
