JPS61190558U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例に係る現像装置の断
面図である。 １：感光体ドラム、２：現像剤、４：非磁性ス
リーブ、７：永久磁石部材、１３：トナー補給ロ
ーラ。 FIG. 1 is a sectional view of a developing device according to an embodiment of the present invention. 1: Photosensitive drum, 2: Developer, 4: Non-magnetic sleeve, 7: Permanent magnet member, 13: Toner supply roller.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 磁性キヤリアとトナーを混合した現像剤を保持
する回転自在な非磁性スリーブと、該非磁性スリ
ーブ内に配置された複数個の磁極を有する永久磁
石部材と、前記現像剤を収容する現像剤槽と、前
記トナーを収容しかつ前記現像剤槽と連通するト
ナー排出口を有しかつ該排出口にトナー補給用可
動部材を有するトナー槽と、前記非磁性スリーブ
上に保持された現像剤の厚さを規制するドクター
部材と、前記非磁性スリーブに現像バイアス電圧
を印加する直流電源とを有する現像装置において
、前記非磁性スリーブと前記ドクター部材との間
に電流検出部材を接続し、該電流検出部材により
検出された電流値に応じて前記トナー補給用可動
部材の駆動を制御する制御手段を設けたことを特
徴とする現像装置。 a rotatable non-magnetic sleeve holding a developer containing a mixture of magnetic carrier and toner; a permanent magnet member having a plurality of magnetic poles disposed within the non-magnetic sleeve; and a developer tank containing the developer; A toner tank containing the toner and having a toner discharge port communicating with the developer tank, the discharge port having a movable member for replenishing toner, and a thickness of the developer held on the non-magnetic sleeve. In a developing device having a regulating doctor member and a DC power source applying a developing bias voltage to the non-magnetic sleeve, a current detecting member is connected between the non-magnetic sleeve and the doctor member, and the current detecting member A developing device comprising a control means for controlling driving of the toner replenishing movable member according to a detected current value.