| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rotation unit which is capable of suppressing inclined contact of a contact member with an opposite member even in a configuration in which a shaft on one side and a shaft on the other side have different diameters, and to provide a process cartridge and image forming apparatus.SOLUTION: The rotation unit such as a development device has a shaft provided on a first contact member holding side plate such as a side part on one side of a development case, and a shaft provided on a second contact member holding side plate, with the diameters of the shafts being different. The shaft center O2 of a second shaft 52b as a small diameter shaft is provided on a first load part S1 side rather than a shaft center O1 of a first shaft 52a as a large diameter shaft in the view from the shaft direction of a contact member such as a development roller 5a, the first load part S1 being a location which applies load for an opposite member holding member from the large diameter shaft when the first contact member holding side plate and the second contact member holding side plate start to rotate by energization force by energization means such as a compression spring, with a contact part R between the contact member and an opposite member as a supporting point.</p> |
