Rotary developing device and image forming apparatus

摘要

A rotary developing device that rotates about a rotational axis includes plural developing units, an energized member, a hollow cylindrical unit, a first energizing member, a rotatable unit, a second energizing member, a first conductive member, and a second conductive member. Each developing unit develops a latent image formed on an image holding member into a visible image, and is rotatable about the rotational axis so as to be sequentially movable to a developing position facing the image holding member. The hollow cylindrical unit is arranged along the rotational axis. The rotatable unit is supported rotatably with respect to the hollow cylindrical unit. One end of the first conductive member is connected to the first energizing member supported on an outer periphery of the hollow cylindrical unit. The second conductive member connects the second energizing member supported by the rotatable unit to the energized member supported in a developing unit.

主权项

1. A rotary developing device configured to rotate about a rotational axis, the rotary developing device comprising:
a plurality of developing units each configured to develop a latent image formed on a surface of an image holding member into a visible image and rotatable about the rotational axis so as to be sequentially movable to a developing position facing the image holding member; an energized member supported in a developing unit among the developing units; a hollow cylindrical unit having a space therein, the hollow cylindrical unit being arranged along the rotational axis and fixed so that a rotatable unit rotates about the fixed hollow cylindrical unit; a first energizing member supported on an outer periphery of the hollow cylindrical unit; the rotatable unit supported rotatably with respect to the hollow cylindrical unit and rotating together with the rotary developing device; a second energizing member supported by the rotatable unit, the second energizing member including a contact portion that comes into contact with the first energizing member; a first conductive member having an end connected to the first energizing member and another end lead out to outside the developing device through the space in the hollow cylindrical unit; a second conductive member that connects the second energizing member to the energized member; and a replenishing device supported integrally with the developing units so as to be rotatable about the rotational axis, the replenishing device being configured to transport a developer to be replenished to each of the developing units, the replenishing device including a plurality of replenishing units each provided for one of the developing units, the plurality of replenishing units being arranged in an axial direction of the rotational axis, wherein the hollow cylindrical unit is arranged so as to extend through the rotational axis of the replenishing device.