Service life informing device for charged image carrying member, informing method thereof, process cartridge and image forming apparatus

摘要

A life time informing device for a photosensitive member (101) comprising a body (101) to be charged, a charging member (102) for charging the charge body (101), the charging member is adapted to receive an oscillating voltage and to be in contact with the charge body during the charging operation, and informing means (126) for visually or acoustically informing whether the photosensitive member (101) reaches the life time thereof, based on an accumulated time of the application time during which the oscillating voltage is applied.