JPH0442660U - - Google Patents
Info
- Publication number
- JPH0442660U JPH0442660U JP8381490U JP8381490U JPH0442660U JP H0442660 U JPH0442660 U JP H0442660U JP 8381490 U JP8381490 U JP 8381490U JP 8381490 U JP8381490 U JP 8381490U JP H0442660 U JPH0442660 U JP H0442660U
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical
- discharge device
- corona discharge
- conductive substrate
- ground
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 108091008695 photoreceptors Proteins 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000002265 prevention Effects 0.000 description 3
Description
第１図はこの考案のコロナ放電装置を使用する
電子写真装置の概略構造を示す図、第２図はコロ
ナ放電器の説明図、第３図はこの考案によるコロ
ナ放電装置の１実施例を示す回路図、第４図は検
出信号のパルス幅変調を説明するための波形図、
第５図はコロナ放電電流とデユーテイとの関係を
示す線図、第６図、第７図は第３図のコロナ放電
装置で使用する高圧電源の実施例を示す回路図、
第８図は制御部の動作を説明するためのフローチ
ヤート、第９図はこの考案によるノイズ防止構造
の１実施例を示す図、第１０図は第９図のノイズ
防止構造の効果を説明するための図、第１１図は
ノイズ防止構造の他の実施例を示す図である。
１１……感光体、１７，１８……コロナ放電器
、３０……電流検出回路、３２……制御部、４０
，４７……導電性基板、４１，４９……円筒状の
導体。
Fig. 1 is a diagram showing the schematic structure of an electrophotographic apparatus using the corona discharge device of this invention, Fig. 2 is an explanatory diagram of the corona discharge device, and Fig. 3 is a diagram showing one embodiment of the corona discharge device of this invention. A circuit diagram, FIG. 4 is a waveform diagram for explaining pulse width modulation of the detection signal,
FIG. 5 is a diagram showing the relationship between corona discharge current and duty; FIGS. 6 and 7 are circuit diagrams showing an example of the high-voltage power supply used in the corona discharge device of FIG. 3;
FIG. 8 is a flowchart for explaining the operation of the control section, FIG. 9 is a diagram showing one embodiment of the noise prevention structure according to this invention, and FIG. 10 is for explaining the effect of the noise prevention structure of FIG. 9. FIG. 11 is a diagram showing another embodiment of the noise prevention structure. 11...Photoreceptor, 17, 18...Corona discharger, 30...Current detection circuit, 32...Control unit, 40
, 47... conductive substrate, 41, 49... cylindrical conductor.
Claims (1)
した感光体帯電電流を検出する電流検出回路と、
検出回路の検出信号に応じてコロナ放電器に供給
する高電圧を制御する制御部とを有し、円筒状の
感光体の内側に導電性基板から絶縁した円筒状の
導体を設けて接地したことを特徴とするコロナ放
電装置。 ２ 接地に接続した円筒状の導体の内側に通電し
た部材を配置するようにした請求項１に記載のコ
ロナ放電装置。[Scope of Claim for Utility Model Registration] 1. A current detection circuit for detecting a photoconductor charging current connected between a conductive substrate of a cylindrical photoconductor and ground;
A control unit that controls the high voltage supplied to the corona discharger according to the detection signal of the detection circuit, and a cylindrical conductor insulated from a conductive substrate is provided inside the cylindrical photoreceptor and grounded. A corona discharge device characterized by: 2. The corona discharge device according to claim 1, wherein the energized member is disposed inside a cylindrical conductor connected to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8381490U JPH0442660U (en) | 1990-08-07 | 1990-08-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8381490U JPH0442660U (en) | 1990-08-07 | 1990-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0442660U true JPH0442660U (en) | 1992-04-10 |
Family
ID=31631802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8381490U Pending JPH0442660U (en) | 1990-08-07 | 1990-08-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0442660U (en) |
-
1990
- 1990-08-07 JP JP8381490U patent/JPH0442660U/ja active Pending
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