DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS WITH DEVELOPING DEVICE

• Main Author: SHIGETA KUNIO
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2015
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a developing device and an image forming apparatus which fully mix and agitate a developer to thereby cause no uneven concentration in a toner image.SOLUTION: A developing unit 100 is a device that performs developing while circulating and transporting a developer containing toner and carrier. The developing unit 100 includes a developing roller 110, a supply transportation chamber 120, an agitation transportation chamber 130, a supply transportation member 140, an agitation transportation member 150, and an agitation member 160. The agitation transportation chamber 130 is arranged adjacent to the developing roller 110, and houses a developer that is recovered from the developing roller 110 while communicating with the supply transportation chamber 120 to form a circulation transportation path for a developer. The agitation transportation member 150 and the agitation member 160 are disposed in the agitation transportation chamber 130, and configured to rotate from above to below in mutually forward direction, for transportation in transportation direction G while cooperating to agitate the developer. 【課題】 現像剤の混合撹拌を十分に行ってトナー画像に濃度むらが発生しない現像装置及び画像形成装置を提供する。【解決手段】 現像ユニット１００は、トナー及びキャリアを含む現像剤を循環搬送しながら現像を行う装置である。現像ユニット１００は、現像ローラ１１０、供給搬送室１２０、撹拌搬送室１３０、供給搬送部材１４０，撹拌搬送部材１５０、及び、撹拌部材１６０を備える。撹拌搬送室１３０は、現像ローラ１１０に隣接して配置され、現像ローラ１１０から回収する現像剤を収容すると共に、供給搬送室１２０と連通して現像剤の循環搬送路を形成する。撹拌搬送部材１５０と撹拌部材１６０は、撹拌搬送室１３０内に配置され、互いに順方向に上から下に回転するように構成され、協働して現像剤を撹拌しながら搬送方向Ｇに搬送する。【選択図】 図１