JPS6076362U

JPS6076362U - developing device

Info

Publication number: JPS6076362U
Application number: JP16858983U
Authority: JP
Inventors: 向井　秀雄; 浅田　智幸; 宏斉藤
Original assignee: 株式会社東芝
Priority date: 1983-10-31
Filing date: 1983-10-31
Publication date: 1985-05-28

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面はこの考案の一実施例を示すもので、第１図は電子
複写機の構成を示す断面図、第２図は全体の構成を概略
的に示す断面図、第３図および第４図は攪拌ローラの構
成を示す図、第５図は比較用磁気回路の構成を示す図、
第６図は濃度測定装置の構成を示す図である。１０・・・感光体ドラム（像担持体）、１２・・・現像
装置、３１・・・筐体、３２・・・現像剤、３３・・・
現像ローラ、３４・・・ドクタブレード、３５・・・攪
拌ローラ、４１・・・測定用磁気回路、４２・・・測定
部コア、４３・・・比較用磁気回路、４５・・・比較用
コア、５１〜５４・・・コイル。The drawings show one embodiment of this invention, and FIG. 1 is a sectional view showing the structure of an electronic copying machine, FIG. 2 is a sectional view schematically showing the overall structure, and FIGS. A diagram showing the configuration of the stirring roller, FIG. 5 is a diagram showing the configuration of the magnetic circuit for comparison,
FIG. 6 is a diagram showing the configuration of the concentration measuring device. DESCRIPTION OF SYMBOLS 10... Photosensitive drum (image carrier), 12... Developing device, 31... Housing, 32... Developer, 33...
Developing roller, 34... Doctor blade, 35... Stirring roller, 41... Magnetic circuit for measurement, 42... Measuring section core, 43... Magnetic circuit for comparison, 45... Core for comparison , 51-54... Coil.

Claims

[Scope of utility model registration request]

a density measuring means for measuring a change in toner concentration in the developer as a change in magnetic permeability; a replenishing means for replenishing toner according to the measurement result by the density measuring means; In a developing device comprising a stirring means for stirring to obtain an appropriate concentration, and a developing means for conveying a developer having an appropriate concentration to an image bearing member to develop an image on the image bearing member, the concentration measuring means may A developing device characterized in that it is provided inside a means.