DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

To provide a developing device which, even when a foreign matter such as paper powder gets into the developer container together with a developer which comprises a magnetic toner, can reduce the chances of the foreign matter being again transported to the developer carrier by a transportation member...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: TANAKA HIROKI, MATSUKAWA KENHISA, ITO MOTONARI, KIHARA HIDEO
Format: Patent
Sprache:eng ; jpn
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:To provide a developing device which, even when a foreign matter such as paper powder gets into the developer container together with a developer which comprises a magnetic toner, can reduce the chances of the foreign matter being again transported to the developer carrier by a transportation member, thereby preventing occurrence of the image quality becoming deteriorated, and also to provide a process cartridge having the developing device and an image forming apparatus including the developing device.SOLUTION: The developing device includes: a developer carrier which carries a developer comprising a magnetic toner; and a transportation member including a rotation shaft and a rotation member one end of which is fixed to the rotation shaft and the other end is a free end, for transporting the developer to the developer carrier. The free end of the rotation member is provided with a magnetism generation member and is configured such that the tip of the free end of the rotation member and the tip of the magnetism generation member on the side of the free end in their position in use do not come into contact with the gravity-wise lowermost portion of the inner wall of the developing frame body which comprises the developing chamber.SELECTED DRAWING: Figure 1 【課題】 紙粉などの異物が磁性トナーを含む現像剤と共に現像容器に混入したとしても、搬送部材によって再び現像剤担持体へ搬送されることを軽減し、画像不良の発生を抑制できる現像装置、プロセスカートリッジおよび画像形成装置を提供する。【解決手段】 磁性トナーを含む現像剤を担持する現像剤担持体と、回転軸と一端が回転軸に固定され他端が自由端となる回転部材とを備え現像剤担持体へ現像剤を搬送する搬送部材と、を有する現像装置であって、回転部材の自由端には、磁気を発生する磁気発生部材が設けられ、使用時の姿勢において、回転部材の自由端側の先端、および、磁気発生部材の自由端側における先端は、現像室を構成する現像枠体の内壁面のうち、少なくとも重力方向における最も下方となる最下部に接触されないように構成されている。【選択図】 図1