JPH0545725U - Electrophotographic device charging device - Google Patents
Electrophotographic device charging deviceInfo
- Publication number
- JPH0545725U JPH0545725U JP9350691U JP9350691U JPH0545725U JP H0545725 U JPH0545725 U JP H0545725U JP 9350691 U JP9350691 U JP 9350691U JP 9350691 U JP9350691 U JP 9350691U JP H0545725 U JPH0545725 U JP H0545725U
- Authority
- JP
- Japan
- Prior art keywords
- photoconductor
- surface potential
- charging device
- electrophotographic apparatus
- potential
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0266—Arrangements for controlling the amount of charge
Abstract
(57)【要約】
【目的】 本考案は電子写真装置の帯電装置に関するも
のであり、その目的とするところは、感光体の表面電位
を検出する表面電位計に異物が付着することを防ぎ、表
面電位計が常に真の表面電位を検出できるようにするこ
とである。
【構成】 感光体１の表面電位を検出する表面電位計４
に防塵カバー６を取付け、かつ、防塵カバー６に電源７
を接続して表面電位計４の校正を行えるようにした。
(57) [Summary] [Object] The present invention relates to a charging device for an electrophotographic apparatus, and an object thereof is to prevent foreign matter from adhering to a surface electrometer for detecting the surface potential of a photoreceptor, The surface electrometer should always be able to detect the true surface potential. [Structure] Surface potential meter 4 for detecting the surface potential of the photoreceptor 1.
Attach the dustproof cover 6 to the
Is connected so that the surface electrometer 4 can be calibrated.
Description
【０００１】[0001]
本考案は、電子写真装置の帯電装置に関するものである。 The present invention relates to a charging device for an electrophotographic apparatus.
【０００２】[0002]
図３に一般に知られている電子写真装置の帯電装置の概略図を示す。電子写真 装置の帯電装置は、感光体１、帯電器２、高圧電源３、表面電位計４、制御装置 ５で構成される。 FIG. 3 shows a schematic view of a charging device of a generally known electrophotographic apparatus. The charging device of the electrophotographic apparatus includes a photoconductor 1, a charger 2, a high voltage power source 3, a surface potential meter 4, and a controller 5.
【０００３】 帯電器２は、一定速度で回転する光導電性のある感光体１と一定距離を持って 対向しており、前記感光体１を一定電位に帯電させている。前記帯電器２には、 高電圧を印加するための高圧電源３が接続されている。前記感光体１の表面電位 は、前記感光体１と一定の距離で対向する表面電位計４により検出される。制御 装置５は、前記表面電位計４で検出した表面電位が規定値であるかどうかを比較 し、規定値でない場合には、表面電位が規定値に達するように前記高圧電源３を 制御する。The charging device 2 faces the photoconductor 1 having photoconductivity that rotates at a constant speed with a constant distance, and charges the photoconductor 1 to a constant potential. A high voltage power source 3 for applying a high voltage is connected to the charger 2. The surface potential of the photoconductor 1 is detected by a surface potential meter 4 facing the photoconductor 1 at a constant distance. The controller 5 compares whether or not the surface potential detected by the surface electrometer 4 is a specified value, and if it is not a specified value, controls the high-voltage power supply 3 so that the surface potential reaches the specified value.
【０００４】[0004]
上記した従来技術の電子写真装置の帯電装置では、電子写真装置に使用する黒 色粉体インクであるトナーや、記録媒体である用紙の紙粉等の異物が表面電位計 に付着するため、表面電位計が感光体の真の表面電位を測定できない状態（誤動 作）が発生し、制御装置によって感光体の表面電位を規定値に保持することがで きないという問題があった。表面電位を規定値に保持できなければ、印字濃度の 低下等、印刷品質上各種の障害が発生する。 In the above-described charging device for the electrophotographic apparatus of the prior art, the toner, which is the black powder ink used in the electrophotographic apparatus, and the foreign matter such as the paper dust of the recording medium paper adheres to the surface electrometer, and There was a problem that the electrometer could not measure the true surface potential of the photoconductor (erroneous operation), and the control device could not keep the surface potential of the photoconductor at the specified value. If the surface potential cannot be maintained at the specified value, various problems such as reduction of print density will occur in print quality.
【０００５】 従って、本考案の目的は上記した従来技術の欠点をなくし、表面電位計が常に 感光体の真の表面電位を検出することを可能とし、その結果として印刷品質の安 定化を図ることである。Therefore, the object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to allow the surface electrometer to always detect the true surface potential of the photoconductor, and as a result, to stabilize the print quality. That is.
【０００６】[0006]
上記目的は、表面電位計に異物付着防止のための防塵カバーを付加し、該防塵 カバーを電源にて一定電位に帯電させること、又は接地状態にすることにより達 成される。 The above object is achieved by adding a dustproof cover for preventing foreign matter from adhering to the surface electrometer and charging the dustproof cover with a power source to a constant potential or grounding the dustproof cover.
【０００７】[0007]
上記のように構成された電子写真装置の帯電装置では、表面電位計が感光体の 表面電位を検出しないときには、異物が表面電位計に付着するのを防止する。ま た、仮に、表面電位の検出中に異物が付着し、表面電位計が感光体の真の表面電 位を検出することができなくなっても、防塵カバーに接続されている電源により 防塵カバーの表面電位計対向面で表面電位計の校正が行える。 In the charging device of the electrophotographic apparatus configured as described above, foreign matter is prevented from adhering to the surface electrometer when the surface electrometer does not detect the surface potential of the photoconductor. In addition, even if foreign matter adheres during the detection of the surface potential and the surface electrometer cannot detect the true surface potential of the photoconductor, the power connected to the dust cover will prevent the dust cover from The surface electrometer can be calibrated on the surface facing the surface electrometer.
【０００８】[0008]
以下、本考案を図面を参照して説明する。図１及び図２は、本考案による帯電 装置の一実施例を示す概略図である。 Hereinafter, the present invention will be described with reference to the drawings. 1 and 2 are schematic views showing an embodiment of a charging device according to the present invention.
【０００９】 感光体１は、帯電器２によって一定電位に帯電されており、帯電器２には高電 圧を印加するための高圧電源３が接続されている。感光体１の表面電位は、防塵 カバー６が付加された表面電位計４により検出される。防塵カバー６には電源７ が接続されており、感光体１の必要とする表面電位と同一の電位に帯電されてい る。制御装置５は、表面電位計４で検出された電位が規定値を保持するように高 圧電源３を制御する。The photoreceptor 1 is charged to a constant potential by the charger 2, and the charger 2 is connected to a high voltage power source 3 for applying a high voltage. The surface potential of the photoconductor 1 is detected by the surface potential meter 4 provided with a dustproof cover 6. A power source 7 is connected to the dustproof cover 6 and is charged to the same potential as the surface potential required by the photoconductor 1. The control device 5 controls the high-voltage power supply 3 so that the potential detected by the surface electrometer 4 holds a specified value.
【００１０】 図１は感光体１の表面電位を検出するときであり、防塵カバー６は感光体１に 対して開いた状態になっている。図２は感光体１の表面電位を検出しないときで あり、防塵カバー６は感光体１に対して閉じた状態になっている。この状態で防 塵カバー６により、表面電位計４の異物付着防止及び校正をすることができる。 また、表面電位計４を校正する方法としては上記方法の他に、防塵カバー６を 接地状態にする方法も考えられる。FIG. 1 shows a case in which the surface potential of the photoconductor 1 is detected, and the dustproof cover 6 is open to the photoconductor 1. FIG. 2 shows the case where the surface potential of the photoconductor 1 is not detected, and the dustproof cover 6 is in a closed state with respect to the photoconductor 1. In this state, the dust cover 6 can prevent foreign matter from adhering to the surface electrometer 4 and perform calibration. As a method of calibrating the surface electrometer 4, in addition to the above method, a method of putting the dustproof cover 6 in a grounded state can be considered.
【００１１】[0011]
本考案によれば、表面電位計に防塵カバーを取付け、かつ、防塵カバーでの校 正を行えるようにしたので、表面電位計は常に表面電位の真値を検出することが 可能となり、常に印刷品質の安定化が図れる。 According to the present invention, since the dustproof cover is attached to the surface electrometer and the calibration with the dustproof cover can be performed, the surface electrometer can always detect the true value of the surface potential and always print. Quality can be stabilized.
【図１】 本考案による電子写真装置の帯電装置の一実
施例を示す概略図であり、感光体の表面電位を検出する
状態である。FIG. 1 is a schematic view showing an embodiment of a charging device of an electrophotographic apparatus according to the present invention, in a state in which the surface potential of a photoconductor is detected.
【図２】 本考案による電子写真装置の帯電装置の一実
施例を示す概略図であり、感光体の表面電位を検出しな
い状態である。FIG. 2 is a schematic view showing an embodiment of a charging device for an electrophotographic apparatus according to the present invention, in a state in which the surface potential of a photoconductor is not detected.
【図３】 従来技術による電子写真装置の帯電装置を示
す概略図である。FIG. 3 is a schematic view showing a charging device of an electrophotographic apparatus according to a conventional technique.
１は感光体、２は帯電器、３は高圧電源、４は表面電位
計、５は制御装置、６は防塵カバーである。Reference numeral 1 is a photoconductor, 2 is a charger, 3 is a high-voltage power supply, 4 is a surface electrometer, 5 is a control device, and 6 is a dust cover.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 篠原 勝弘 茨城県勝田市武田1060番地 日立工機株式 会社内 (72)考案者 小川 開之 茨城県勝田市武田1060番地 日立工機株式 会社内 (72)考案者 小倉 義夫 茨城県勝田市武田1060番地 日立工機株式 会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Katsuhiro Shinohara 1060 Takeda, Katsuta-shi, Ibaraki Hitachi Koki Co., Ltd. (72) Kaiyuki Ogawa 1060 Takeda, Katsuta-shi, Ibaraki Hitachi Koki Co., Ltd. (72) ) Inventor Yoshio Ogura 1060 Takeda, Katsuta City, Ibaraki Prefecture Hitachi Koki Co., Ltd.
Claims (3)
体と、該感光体と一定の距離を持って対向し、前記感光
体を一定電位に帯電する帯電器と、該帯電器に接続され
前記帯電器に高電圧を印加する高圧電源と、前記感光体
と一定の距離を持って対向し、前記感光体の表面電位を
検出する表面電位計と、該表面電位計で検出した表面電
位が規定値であるかどうか比較し、規定値でない場合に
は表面電位が規定値に達するように前記高圧電源を制御
する制御装置で構成される電子写真装置の帯電装置にお
いて、 前記表面電位計に防塵カバーを付加したことを特徴とす
る電子写真装置の帯電装置。1. A photoconductive photoconductor that rotates at a constant speed, a charger that faces the photoconductor with a certain distance and that charges the photoconductor to a constant potential, and is connected to the charger. A high-voltage power supply for applying a high voltage to the charger, a surface electrometer that faces the photoconductor with a certain distance and detects the surface potential of the photoconductor, and a surface potential detected by the surface electrometer. Is a specified value, in the case of not a specified value, in the charging device of the electrophotographic apparatus constituted by a control device that controls the high-voltage power supply so that the surface potential reaches a specified value, in the surface electrometer A charging device for an electrophotographic apparatus, which is provided with a dustproof cover.
る表面電位と同一の電位にしたことを特徴とする請求項
１記載の電子写真装置の帯電装置。2. The charging device for an electrophotographic apparatus according to claim 1, wherein the dust-proof cover has the same potential as the surface potential required by the photoconductor.
特徴とする請求項１記載の電子写真装置の帯電装置。3. The charging device for an electrophotographic apparatus according to claim 1, wherein the dustproof cover is grounded.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9350691U JPH0545725U (en) | 1991-11-14 | 1991-11-14 | Electrophotographic device charging device |
| DE19924238440 DE4238440C2 (en) | 1991-11-14 | 1992-11-13 | Electrophotographic device with a charging device and method for controlling the charging of a photosensitive body of an electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9350691U JPH0545725U (en) | 1991-11-14 | 1991-11-14 | Electrophotographic device charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0545725U true JPH0545725U (en) | 1993-06-18 |
Family
ID=14084237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9350691U Withdrawn JPH0545725U (en) | 1991-11-14 | 1991-11-14 | Electrophotographic device charging device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0545725U (en) |
| DE (1) | DE4238440C2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19511286A1 (en) * | 1995-03-28 | 1996-10-02 | Philips Patentverwaltung | X-ray imaging device with a photoconductor and a charging device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695255A (en) * | 1979-12-28 | 1981-08-01 | Canon Inc | Image forming apparatus |
| JPH01123267A (en) * | 1987-11-06 | 1989-05-16 | Hitachi Koki Co Ltd | Electrophotographic device |
| JPH03107958A (en) * | 1989-09-22 | 1991-05-08 | Ricoh Co Ltd | Image forming device |
| JPH03160472A (en) * | 1989-11-20 | 1991-07-10 | Ricoh Co Ltd | Image forming device |
-
1991
- 1991-11-14 JP JP9350691U patent/JPH0545725U/en not_active Withdrawn
-
1992
- 1992-11-13 DE DE19924238440 patent/DE4238440C2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE4238440A1 (en) | 1993-05-27 |
| DE4238440C2 (en) | 1997-01-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19960208 |