Image forming apparatus having a configuration to prevent electric discharge in a cleaning member

摘要

An image forming apparatus is provided, which includes an image forming unit configured to form an image on a recording medium, a cleaned body that is an intended body to be cleaned, a cleaning member configured to clean at least attached matter, which is generated in image formation by the image forming unit, on the cleaned body, a backup member disposed to face the cleaning member across the cleaned body, a voltage supply unit configured to supply the backup member with a cleaning voltage having a polarity identical to a charge polarity of the attached matter, in an operation of cleaning the cleaned body, a detector configured to detect an electric quantity of the cleaning member when the cleaning voltage is supplied to the backup member by the voltage supply unit, and a controller configured to control the detected electric quantity of the cleaning member to be a predetermined value.

主权项

1. An image forming apparatus comprising:
an image forming unit configured to form an image on a recording medium; a cleaned body that is an intended body to be cleaned; a cleaning member configured to clean off at least attached matter, which is generated in image formation by the image forming unit, on the cleaned body; a backup member disposed to face the cleaning member across the cleaned body; a voltage supply unit configured to supply the backup member with a cleaning voltage having a polarity identical to a charge polarity of the attached matter, in an operation of cleaning the cleaned body; a transistor disposed on an electric path of a cleaning current carried through the backup member and the cleaning member; a current detector configured to detect the cleaning current carried through the backup member and the cleaning member when the cleaning voltage is supplied to the backup member by the voltage supply unit; and a controller configured to control the transistor to hold the cleaning current constant.