Developing cartridge and image forming device with pressing member

摘要

A developing cartridge that maintains a pressing condition to press a developer carrier against the image carrier is described. The developing cartridge may include a coil spring that presses the developer carrier against the image carrier. The coil spring may include a handle that transmits a pressing force to the coil spring via the contacting member. By doing so, every time the developing cartridge is replaced, a new coil spring and handle can be provided for the color laser printer with the developing cartridge attached. Therefore, a constant pressure by the coil spring can be continuously maintained. Thus, a preferable pressure condition of the developer carrier against the image carrier can be continuously maintained.

主权项

1. A developing cartridge comprising:
a case configured to contain developer, the case including a first wall and a second wall, the second wall opposite to the first wall and a third wall extending between the first wall and the second wall; a developer carrier supported by the first wall and the second wall and configured to be rotatable about a rotational axis extending in a direction parallel to the third wall and spaced apart from the third wall; a coupling gear disposed on the first wall and configured to transmit a driving force to the developer carrier so as to rotate the developer carrier, an elastic member configured to press the third wall in a first direction perpendicular to the rotational axis; and a pressing member configured to press the elastic member in the first direction, wherein the elastic member is located between the third wall and the pressing member.