Patent ID: 9651897
Date: 2017-05-16
CPC Classifications: G03G

Claim:
1. An image forming apparatus comprising: an image carrier rotatably supported centering on a spindle; a development device developing an electrostatic latent image formed on the image carrier; and a guide part guiding the development device in an approaching direction to the image carrier in a direction orthogonal to an axial direction of the spindle, wherein the development device includes: a magnet roller including a shaft on which magnets are arrayed along a circumferential direction and a rotation sleeve incorporating the shaft to carry a developer on a surface of the rotation sleeve by a magnetic force of the magnets; and a cover member includes a bearing part formed into a hollow boss-like shape projecting to the outside in an axial direction of the shaft and the bearing part is engaged with the guide part and, into the bearing part, an end part at the outside in the axial direction of the shaft is inserted, the end part of the shaft and the bearing part respectively include an engaged part and an engaging part, the engaged part and the engaging part include respective contact faces provided along an action direction of a force acting from the guide part to the bearing part when the bearing part is engaged with the guide part and the development device approaches the image carrier, the contact faces of the engaged part and the engaging part come into contact with each other so as to restrict positions of the magnets in the circumferential direction of the shaft the development device is configured so that a clearance is provided between an outer circumferential face of the end part of the shaft and an inner circumferential face of the bearing part surrounding the outer circumferential face at an upstream side from the contact faces in the action direction of the force.