JPS5831554U - Toner remaining amount detection device - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は本実施例の現像器の断面図、第２図は第１図を
矢印Ａの方向から見た図、第３図はトナー検出回路図、
第４図はトナー量の分布を示す図、第５図は第２の実施
−を示す図、第６図は第３の実施例を示す図、第７図ａ
、　　ｂは本考案の第４の実施例を示す図、第８図ａ、
　　ｂは本考案の第５の実施例を示す図、第９図はトナ
ー残量検出回路図、第１０図はトナー残量と出力電圧Ｖ
Ａの関係を示す図、第１１図は他のトナー残量検出回路
のブロック図、第、１２図は第１１図の詳細回路図、第
１３図はトナー量と出力電圧Ｖ、の関係を示す図、第１
４図はマイクロコンピュータを用いたトナー残量検出回
路図である。 図において、１０はトナー、１１は電子写真感光ドラム
、１２は磁気スリーブ現像ローラ、１３は収容筐体、１
５はトナー検知導体、１８はコイル状金属性検知導体を
夫々示す。 （Ｑ）　　　、Ｒ。 １１　　　　＼　　　　門 １ （α） １１ へ）−１FIG. 1 is a sectional view of the developing device of this embodiment, FIG. 2 is a view of FIG. 1 viewed from the direction of arrow A, and FIG. 3 is a toner detection circuit diagram.
Fig. 4 is a diagram showing the distribution of toner amount, Fig. 5 is a diagram showing the second implementation, Fig. 6 is a diagram showing the third embodiment, and Fig. 7a.
, b is a diagram showing the fourth embodiment of the present invention, FIG. 8a,
b is a diagram showing the fifth embodiment of the present invention, FIG. 9 is a circuit diagram for detecting the remaining amount of toner, and FIG. 10 is a diagram showing the remaining amount of toner and output voltage V.
11 is a block diagram of another toner remaining amount detection circuit, FIG. 12 is a detailed circuit diagram of FIG. 11, and FIG. 13 is a diagram showing the relationship between toner amount and output voltage V. Figure, 1st
FIG. 4 is a circuit diagram for detecting the remaining amount of toner using a microcomputer. In the figure, 10 is a toner, 11 is an electrophotographic photosensitive drum, 12 is a magnetic sleeve developing roller, 13 is a storage case, 1
Reference numeral 5 indicates a toner detection conductor, and reference numeral 18 indicates a coiled metal detection conductor. (Q), R. 11 \ Gate 1 (α) To 11) -1

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 現像ローラにより記録体上の静電潜像を現像する現像器
内の磁性トナーの残量を検出するトナー残量検知装置に
於て、トナー残量を検出する検知導体を前記現像ローラ
の長手方向に大略平行に配置すると共に、前記検知導体
の表面を絶縁材料により覆ったことを特徴とするトナー
残量検知装置。In a toner remaining amount detection device that detects the remaining amount of magnetic toner in a developing device that develops an electrostatic latent image on a recording medium with a developing roller, a detection conductor for detecting the remaining amount of toner is arranged in the longitudinal direction of the developing roller. A remaining toner amount detecting device characterized in that the detecting conductor is arranged substantially parallel to the detecting conductor, and the surface of the detecting conductor is covered with an insulating material.