JPS6076361U

JPS6076361U - developing device

Info

Publication number: JPS6076361U
Application number: JP16858683U
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図は濃度測定部の構成を示す図、
第４図は磁気抵抗調整用部材を説明するための図、第５
図は濃度測定装置の構成を示す図であり、第６図は他の
実施例における磁気抵抗調整用部材を説明するための図
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、−４６・・・磁気抵抗調整用部材、４７・・・位
置調整用ネジ、５１〜５４・・・コイル、５５・・・濃
度測定部。The drawings show one embodiment of this invention. Fig. 1 is a cross-sectional view showing the structure of an electronic copying machine, Fig. 2 is a cross-sectional view schematically showing the overall structure, and Fig. 3 is a diagram showing the density measuring section. A diagram showing the configuration,
Figure 4 is a diagram for explaining the magnetic resistance adjustment member, Figure 5
The figure is a diagram showing the configuration of the concentration measuring device, and FIG. 6 is a diagram for explaining a magnetic resistance adjusting member in another embodiment. 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 , -46... Member for magnetic resistance adjustment, 47... Screw for position adjustment, 51-54... Coil, 55... Concentration measuring section.

Claims

[Scope of utility model registration request]

A concentration measuring means for measuring a change in the concentration of the developer as a change in magnetic permeability, a means for maintaining the developer at an appropriate concentration according to the measurement result by the concentration measuring means, and a means for transporting the developer at the appropriate concentration to the image carrier. and a developing means for developing an image on an image carrier, wherein the density measuring means moves a part of the magnetic core to change the magnetic resistance, and a comparison magnetic field for temperature change correction. A developing device comprising: a circuit; and a measuring magnetic circuit that is adjusted by the comparative magnetic circuit and outputs a signal corresponding to the concentration of the developer.