JPH0396654U

JPH0396654U -

Info

Publication number: JPH0396654U
Application number: JP425390U
Authority: JP
Priority date: 1990-01-19
Filing date: 1990-01-19
Publication date: 1991-10-03

Description

[Brief explanation of the drawing]

第１図は本考案が適用されるレーザプリンタの
一例を示す概略的全体構成図、第２図は同上レー
ザープリンタの画像形成部の概略的要部構成図、
第３図は同上レーザープリンタの制御回路の一例
を示すブロツク図、第４図はフオトセンサのタイ
ミング制御の説明図、第５図はフオトセンサが併
設された除電用ＬＥＤアレイの概略的要部斜視図
、第６図は除電用ＬＥＤアレイの回路構成例を示
す回路図である。１……画像形成部、２……感光体、３……現像
装置、４……転写装置、５……クリーニング装置
、６……定着装置、１５……除電装置（除電用Ｌ
ＥＤアレイ）、１６……反射式フオトセンサ、１
８……受光素子。 FIG. 1 is a schematic overall configuration diagram showing an example of a laser printer to which the present invention is applied, and FIG. 2 is a schematic diagram of the main part configuration of an image forming section of the same laser printer.
FIG. 3 is a block diagram showing an example of the control circuit of the laser printer, FIG. 4 is an explanatory diagram of the timing control of the photo sensor, and FIG. 5 is a schematic perspective view of the main parts of the static elimination LED array with which the photo sensor is attached. FIG. 6 is a circuit diagram showing an example of the circuit configuration of the static elimination LED array. DESCRIPTION OF SYMBOLS 1... Image forming section, 2... Photoreceptor, 3... Developing device, 4... Transfer device, 5... Cleaning device, 6... Fixing device, 15... Static eliminator (static eliminator L)
ED array), 16... Reflective photo sensor, 1
8... Light receiving element.

Claims

[Scope of utility model registration request]

A photoconductor, a charging device that uniformly charges the surface of the photoconductor, an optical writing device that exposes the charged photoconductor to light corresponding to a document image or an image signal to form an electrostatic latent image, and a photoconductor. a developing device that develops an electrostatic latent image formed on the body to form a toner image;
A transfer device that transfers the toner image formed on the photoreceptor to a transfer member, a fixing device that fixes the toner image transferred onto the transfer member, and a cleaning device that removes residual toner on the photoreceptor after transfer. , a static eliminator that eliminates static electricity from the surface of the photoreceptor after cleaning, and an image forming apparatus in which the photoreceptor is removable, detecting whether or not the photoreceptor is attached based on light reflected from the photoreceptor. A reflective photo sensor is provided and this photo sensor is placed in a range from the transfer device to the charging device, or
An image forming apparatus characterized in that the static eliminator includes an LED array, and the photo sensor is provided integrally with the static eliminator LED array.