JPS60130473U

JPS60130473U - Cleaning blade pressure device in electrophotographic copying machine

Info

Publication number: JPS60130473U
Application number: JP1688284U
Authority: JP
Inventors: 大塚　浩久; 福田　晴彦
Original assignee: 株式会社リコー
Priority date: 1984-02-10
Filing date: 1984-02-10
Publication date: 1985-08-31

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 drawings]

第１図は、電子写真複写機の感光体ドラム周辺部の構成
部品の側面図、第２図および第３図は、その部分に従来
から使用されてきた感光体ドラムのクリーニング装置の
拡大側面図、第４図ａ、　ｂ図は、本考案クリーニング
ブレード加圧装置の側面図で、そのａはブレードの加圧
時の状態、そのｂは解除時の状態を示す。第５図は、ブ
レード加圧装置の制御回路のブロック図、第６図は、そ
のうちの制御部の配線図、第７図は前記制御回路の作動
のタイミイグチャートを示す。第８図は、本考案の別の
実施例の要部側面図である。７・・・ブレード、１１・・・ブレードブラケット、１
−２・・・ブレードホルダ、１４□・・・永久磁石、１
５・・・電磁コイル、２０・・・制御部、２１・・・出
力回路、２２・・・ブレード加圧信号、２３・・・ブレ
ード解除信号、２４・・・コイル出力Ａ１２５・・・コ
イル出力Ｂ１２６〜２９・・・トランジスタ、３０・・
・可変抵抗器。第４図FIG. 1 is a side view of components around the photoreceptor drum of an electrophotographic copying machine, and FIGS. 2 and 3 are enlarged side views of a photoreceptor drum cleaning device conventionally used in that area. Figures 4a and 4b are side views of the cleaning blade pressurizing device of the present invention, where a shows the state when the blade is pressurized, and b shows the state when the blade is released. FIG. 5 is a block diagram of the control circuit of the blade pressurizing device, FIG. 6 is a wiring diagram of the control section thereof, and FIG. 7 is a timing chart of the operation of the control circuit. FIG. 8 is a side view of main parts of another embodiment of the present invention. 7...Blade, 11...Blade bracket, 1
-2...Blade holder, 14□...Permanent magnet, 1
5... Electromagnetic coil, 20... Control unit, 21... Output circuit, 22... Blade pressure signal, 23... Blade release signal, 24... Coil output A125... Coil output B126-29...transistor, 30...
・Variable resistor. Figure 4

Claims

[Scope of utility model registration request]

(1) In a cleaning device for an electrophotographic copying machine, at least a portion of the cleaning blade is formed of a non-magnetic material and is rotatably supported by a bracket, and the cleaning blade is fixed to one end of the non-magnetic material portion of the bracket. A cleaning blade pressurizing device consisting of a permanent magnet and an electromagnetic coil placed opposite the magnet.

(2) By controlling the direction of energization to the electromagnetic coil,
A cleaning blade pressurizing device for an electrophotographic copying machine as set forth in claim (1) of the utility model registration, characterized in that the cleaning blade pressurizing device pressurizes and releases the blade.

(3) Utility model registration claim item (1) or (2) characterized in that the blade is pressurized when the opposing magnetic poles of the electromagnetic coil and the permanent magnet have the same polarity.
A cleaning blade pressurizing device for an electrophotographic copying machine as described in 1.

(4) Utility model registration claims (1) to (3) characterized in that the pressing force of the cleaning blade is adjusted by varying the strength of the current passing through the electromagnetic coil. A cleaning blade pressurizing device in the electrophotographic copying machine described above.