Image forming apparatus and fixing unit attachable to image forming apparatus

摘要

The present invention provides an apparatus having a part of a current detecting circuit configured to detect current to a heater in a fixing unit so that a main body of the image forming apparatus may have one configuration for 100 V and 200 V and provides an equal resolution of current detection for an apparatus for 100 V and an apparatus for 200 V.

主权项

1. An image forming apparatus comprising:
an apparatus main body to which a first fixing unit having a heater corresponding to a 100 V series commercial power supply and a second fixing unit having a heater corresponding to a 200 V series commercial power supply are exchangeably attachable; a current detecting unit provided in the apparatus main body, wherein the current detecting unit detects current fed to the heater in the first fixing unit or the second fixing unit attached to the apparatus main body through a current transformer that includes a primary side and a secondary side; and a circuit which connects the current detecting unit with the secondary side of the current transformer, wherein an unfixed image formed on a recording material is fixed to the recording material with heat from the heater in the first fixing unit or the second fixing unit attached to the apparatus main body, wherein at least one of the first fixing unit and the second fixing unit has a part of the circuit provided in the secondary side of the current transformer, and wherein the part of the circuit provided in the at least one of the first and second fixing units is connected with another part of the circuit provided in the secondary side of the current transformer in the apparatus main body when the at least one of the first and second fixing units having the part of the circuit is attached to the apparatus main body.