developing device

Abstract

Abstract PURPOSE:To prevent a developing roller from deforming and to perform development without any irregularity by bringing the developing roller into contact with a photosensitive body with specific pressure when the photosensitive body is driven, and holding it in a noncontacting state or in a contact state of less than the specific pressure when the photosensitive body is not driven. CONSTITUTION:A guide rail 4 is given with the habit of counterclockwise rotation through the operation of a spring 7 and the developing roller 9 contacts the photosensitive body 1 with the proper pressure, so that developing operation is carried out in this state. At this time, a cam 8 is not in contact with a pressure lever 6, but a motor 10 rotates by 180 deg. when the development is not performed to press the pressure lever 6 by the projection part 8a of the cam 8, so a lever 6 rotates clockwise. Consequently, the bent part 51 of a developing container 13 is pressed up by the guide rail 4 to rotate counterclockwise around a support shaft 3, so that the developing roller 9 leaves the photosensitive body 1 and is released from the pressed state. Thus, the developing roller 9 is prevented from deforming.

Inventors

• 👤 Hiroyuki Idenawa
• 👤 弘行 出縄

Bibliographic Details