Patent ID: 9471017
Filing Date: 2016-10-18
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: a main body of the image forming apparatus; a fixing unit configured to fix an unfixed image on a recording material to the recording material while conveying the recording material with the recording material nipped in a fixing nip portion, the fixing unit being removably mounted on the main body and including a cam for switching pressure applied to the fixing nip portion and a first engagement portion for transmitting a driving force to the cam; and a second engagement portion provided in the main body so as to engage with the first engagement portion in a state where the fixing unit is mounted on the main body, wherein the image forming apparatus can switch the fixing nip portion between a pressurized state and a pressure released state by rotating the cam via the first engagement portion and the second engagement portion, wherein a difference between a phase of the cam in the pressurized state and a phase of the cam in the pressure released state is 180°, wherein the first engagement portion has two inlets which the second engagement portion enters, and a difference between respective phases of the two inlets is 180°, and wherein the first engagement portion and the second engagement portion engage with each other when the fixing unit is mounted on the main body regardless of whether the fixing nip portion is in the pressurized state or the pressure released state.