JPH0248945U - - Google Patents
Info
- Publication number
- JPH0248945U JPH0248945U JP12923388U JP12923388U JPH0248945U JP H0248945 U JPH0248945 U JP H0248945U JP 12923388 U JP12923388 U JP 12923388U JP 12923388 U JP12923388 U JP 12923388U JP H0248945 U JPH0248945 U JP H0248945U
- Authority
- JP
- Japan
- Prior art keywords
- light
- amount
- shielding member
- forming apparatus
- photoreceptor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Optical Systems Of Projection Type Copiers (AREA)
- Control Of Exposure In Printing And Copying (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
第１図は本考案の画像形成装置としての複写機
の断面図、第２図は遮光部材の平面図、第３図Ａ
及びＢは遮光部材の作用を示す側面図、第４図は
本考案に係る制御回路、第５図は第４図の制御回
路の要部の波形に関連した図、第６図は本考案の
他の実施例を示す第３図に対応した側面図、第７
図は交流電源電圧の周波数と時間の関係を示す図
、第８図は生成された画像の濃度ムラを模式的に
示す図である。
２１……照明ランプ、３１……感光体ドラム（
受光体）、４１……遮光部材、４５……モータ、
４６……モータ駆動回路、４８……交流電源、４
９……主制御回路、６１……遮光部材、６２……
偏心カム、Ａ……照明走査方向、Ｇ……原稿。
FIG. 1 is a sectional view of a copying machine as an image forming apparatus of the present invention, FIG. 2 is a plan view of a light shielding member, and FIG. 3A
and B are side views showing the action of the light shielding member, FIG. 4 is a control circuit according to the present invention, FIG. 5 is a diagram related to waveforms of the main part of the control circuit in FIG. 4, and FIG. A side view corresponding to FIG. 3 showing another embodiment, No. 7
The figure is a diagram showing the relationship between the frequency of the AC power supply voltage and time, and FIG. 8 is a diagram schematically showing the density unevenness of the generated image. 21...Illumination lamp, 31...Photosensitive drum (
photoreceptor), 41... light shielding member, 45... motor,
46...Motor drive circuit, 48...AC power supply, 4
9... Main control circuit, 61... Light shielding member, 62...
Eccentric cam, A...Illumination scanning direction, G...Document.
Claims (1)
明板を介して原稿を照明走査し、原稿像を受光体
に導くようにした画像形成装置において、 上記照明ランプから照射され受光体に導かれる
光の一部を遮光する遮光部材と、 上記照明走査方向における照明ランプの周期的
な光量変化に対して受光体上の光量が実質上一定
になるように、照明ランプの周期的な光量変化に
対応して上記遮光部材を駆動する駆動手段と、 を有することを特徴とする画像形成装置。 (2) 上記遮光部材は回転カムによつて光量を調
節するものであり、上記駆動部材は交流電源の周
波数に同期して回転カムを回転させるものである
、上記実用新案登録請求の範囲第１項記載の画像
形成装置。[Scope of Claim for Utility Model Registration] (1) In an image forming apparatus in which an illumination lamp connected to an AC power source illuminates and scans a document through a transparent plate and guides the document image to a photoreceptor, a light shielding member that blocks a part of the light that is irradiated and guided to the photoreceptor; and an illumination lamp configured to keep the amount of light on the photoreceptor substantially constant despite periodic changes in the amount of light of the illumination lamp in the illumination scanning direction. An image forming apparatus comprising: driving means for driving the light shielding member in response to periodic changes in light amount. (2) The light shielding member adjusts the amount of light by means of a rotating cam, and the driving member rotates the rotating cam in synchronization with the frequency of an AC power source. The image forming apparatus described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12923388U JPH0248945U (en) | 1988-09-30 | 1988-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12923388U JPH0248945U (en) | 1988-09-30 | 1988-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0248945U true JPH0248945U (en) | 1990-04-05 |
Family
ID=31383320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12923388U Pending JPH0248945U (en) | 1988-09-30 | 1988-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0248945U (en) |
-
1988
- 1988-09-30 JP JP12923388U patent/JPH0248945U/ja active Pending
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