Patent attributes
An image forming unit 100 has a main body 1 and an opening unit 22 that can be opened and closed with respect to the main body 1. An installation unit 99 is provided to install the secondary transfer roller 20 in the opening unit 22 so that a secondary transfer roller 20 of the opening unit 22 can move within a predetermined space within a bearing holder 25. When the opening unit 22 is closed, the secondary transfer roller 20 presses against an opposing roller 21 of the main body 1. A groove 32 in the main body 1 is formed in a direction different from a trajectory on which the shaft 20a of the secondary transfer roller 20 moves when closing the opening unit 22. The shaft 20a of the secondary transfer roller 20 is inserted into the groove 32 while moving within the predetermined space.
