JPH0394557U

JPH0394557U -

Info

Publication number: JPH0394557U
Application number: JP182090U
Authority: JP
Priority date: 1990-01-12
Filing date: 1990-01-12
Publication date: 1991-09-26

Description

[Brief explanation of drawings]

第１図はこの考案に係る現像装置が適用された
レーザープリンタの概略的構成図、第２図は第１
図の要部に係る現像装置の断面図、第３図は第２
図の平面図、第４図はこの考案の一実施例を示す
ドクターローラのモデル的な構成図、第５図は他
の実施例に係る現像ローラ及びドクターローラの
モデル的な平面配置図、第６図は従来の現像装置
の要部を示す斜視図、第７図は現像ローラをドク
ターローラにより加圧する構成を示すモデル的な
構成図、第８図は第７図のドクターローラの応力
分布図である。６……感光体、９……現像装置、１２……トナ
ー（現像剤）、２０……現像ローラ、２３……ド
クターローラ、３１……スプリング（付勢部材）
。 Figure 1 is a schematic configuration diagram of a laser printer to which a developing device according to this invention is applied, and Figure 2 is a schematic diagram of a laser printer to which a developing device according to the invention is applied.
A cross-sectional view of the developing device related to the main part of the figure, FIG.
4 is a model configuration diagram of a doctor roller showing one embodiment of this invention. FIG. 5 is a model plan layout diagram of a developing roller and a doctor roller according to another embodiment. Figure 6 is a perspective view showing the main parts of a conventional developing device, Figure 7 is a model configuration diagram showing a configuration in which the developing roller is pressurized by a doctor roller, and Figure 8 is a stress distribution diagram of the doctor roller in Figure 7. It is. 6...Photoreceptor, 9...Developing device, 12...Toner (developer), 20...Developing roller, 23...Doctor roller, 31...Spring (biasing member)
.

Claims

[Claims for Utility Model Registration] (1) A developing roller that attaches a developer to an electrostatic latent image formed on the surface of a photoconductor to make it visible, and a thin layer of the developer carried on the developing roller. a doctor roller arranged parallel to the developing roller and in contact with its outer surface; and a biasing member that presses the doctor roller toward the developing roller by pressing both ends of the doctor roller. A developing device, wherein the doctor roller has a diameter that gradually increases from both ends to the center so as to equalize the stress distribution of the doctor roller with respect to the developing roller. (2) A developing roller that attaches developer to the electrostatic latent image formed on the surface of the photoreceptor to make it visible, and an outer surface of the developing roller that thins the developer carried on the developing roller. A developing device comprising a doctor roller disposed in contact with the doctor roller, and an urging member that presses the doctor roller toward the developing roller by pressing both ends of the doctor roller, the doctor roller being placed in contact with the developing roller. A developing device characterized in that the axis of the doctor roller is in contact with the axis of the developing roller in a positional relationship rotated by a predetermined angle about the central intersection of both axes so as to equalize the stress distribution of the roller. .