JPH0741005Y2 - Electrophotographic device - Google Patents

Electrophotographic device

Info

Publication number
JPH0741005Y2
JPH0741005Y2 JP9899890U JP9899890U JPH0741005Y2 JP H0741005 Y2 JPH0741005 Y2 JP H0741005Y2 JP 9899890 U JP9899890 U JP 9899890U JP 9899890 U JP9899890 U JP 9899890U JP H0741005 Y2 JPH0741005 Y2 JP H0741005Y2
Authority
JP
Japan
Prior art keywords
electrode plate
grid electrode
metal case
pressing
case
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.)
Expired - Lifetime
Application number
JP9899890U
Other languages
Japanese (ja)
Other versions
JPH0457859U (en
Inventor
二郎 深沢
真治 辻
清一 小泉
登 五味
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shindengen Electric Manufacturing Co Ltd
Original Assignee
Shindengen Electric Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shindengen Electric Manufacturing Co Ltd filed Critical Shindengen Electric Manufacturing Co Ltd
Priority to JP9899890U priority Critical patent/JPH0741005Y2/en
Publication of JPH0457859U publication Critical patent/JPH0457859U/ja
Application granted granted Critical
Publication of JPH0741005Y2 publication Critical patent/JPH0741005Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は電子写真装置、特にスコロトロン帯電装置によ
る帯電の安定化と、除電装置による帯電の妨害排除に関
するものである。
DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an electrophotographic apparatus, and more particularly to stabilization of charging by a scorotron charging device and elimination of interference of charging by a charge eliminating device.

(従来技術) 電子写真装置による画像形成は次のようなプロセスで行
われる。即ち第1図に示す構成概略図中の矢印のよう
に、一方向に回転して帯電装置(1)により電荷を与え
られた感光ドラム(2)の表面に、露光装置(3)より
例えばレーザ光を投射して電気潜像を形成し、これを現
像装置(4)からの磁性現像剤により紙(5)に転写す
る。そののち感光ドラム(2)の表面に残った現像剤を
クリーニングブレード(6)により掻き落としたのち、
最後に除電装置(7)により感光ドラム(2)の表面の
残存電荷を除電して、1回の複写を終了する。
(Prior Art) Image formation by an electrophotographic apparatus is performed in the following process. That is, as indicated by the arrow in the schematic configuration diagram shown in FIG. 1, the surface of the photosensitive drum (2) which is rotated in one direction and charged by the charging device (1) is exposed by the exposure device (3) to a laser Light is projected to form an electric latent image, which is transferred to the paper (5) by the magnetic developer from the developing device (4). After that, the developer remaining on the surface of the photosensitive drum (2) is scraped off by the cleaning blade (6),
Finally, the charge removal device (7) removes the residual charge on the surface of the photosensitive drum (2) to complete one copy.

ところでこの場合良好な画像を得るためには、感光ドラ
ム(2)の表面に目標とする電荷が均一に帯電されるこ
とが必要とされる。そこで従来においてはスコロトロン
帯電装置が広く用いられている。
By the way, in this case, in order to obtain a good image, it is necessary to uniformly charge the surface of the photosensitive drum (2) with a target electric charge. Therefore, conventionally, a scorotron charging device has been widely used.

この装置は例えば第1図中に示すように、断面コ字状の
金属ケース(1a)内に絶縁して支持されたコロナ放電線
(1b)(支持部の図示の省略)と、ケース(1a)の開口
部(1a1)を覆うようにケース(1a)に固定された、網
状のステンレス製グリッド電極板(1c)からなる。そし
てグリッド電極板(1c)が感光ドラム(2)の表面に近
接するように固定された帯電装置のコロナ放電線(1b)
とケース(1a)間に電源(8)により高電圧を印加する
ことにより帯電を行い、またグリッド電極板(1c)と感
光ドラム(2)間に電源(9)によりバイアス電圧を印
加することにより(バイアス電圧を印加しない場合もあ
る)、印加電圧およびグリッド電極(1c)と感光ドラム
(2)間の間隔により、帯電電位を一定に制御するもの
である。
For example, as shown in FIG. 1, this device includes a corona discharge wire (1b) (support part is not shown) which is insulated and supported in a metal case (1a) having a U-shaped cross section, and a case (1a). ) Is fixed to the case (1a) so as to cover the opening (1a1) of (1), and is composed of a mesh-shaped stainless grid electrode plate (1c). The corona discharge wire (1b) of the charging device is fixed so that the grid electrode plate (1c) is close to the surface of the photosensitive drum (2).
By applying a high voltage from the power source (8) between the case and the case (1a), and by applying a bias voltage from the power source (9) between the grid electrode plate (1c) and the photosensitive drum (2). The charging potential is controlled to be constant according to the applied voltage and the interval between the grid electrode (1c) and the photosensitive drum (2) (the bias voltage may not be applied in some cases).

しかしこの従来のスコロトロン帯電装置は、以下に述べ
るような解決すべき課題をもつ。
However, this conventional scorotron charging device has the following problems to be solved.

(従来技術の問題点) 従来のスコロトロン帯電装置においては、装置の組立て
の容易化による製造コストの低下を図るため、ケース
(1a)の開口部へのグリッド電極板(1c)の固定に当た
って次のような手段が用いられている。
(Problems of the prior art) In the conventional scorotron charging device, in order to reduce the manufacturing cost by facilitating the assembling of the device, in order to reduce the manufacturing cost, it is necessary to fix the grid electrode plate (1c) to the opening of the case (1a) as follows. Such means are used.

即ち第2図に示す分解斜視図のように、ケース(1a)の
長手方向の両側端を直角に折曲げて被係止突起(1a2)
を設け、またグリッド電極板(1c)の長手方向の両側端
には、被係止突起(1a2)の設置位置に対応して、被係
止突起差込み穴(1c1)を備えたグリッド電極面と直角
な複数箇の係止突起(1c2)を設ける。そして突起(1a
2)を突起(1c2)の差込み穴(1c1)内に差込むことに
より、ケース(1a)の弾性を利用して結合する構造が用
いられている。
That is, as shown in the exploded perspective view of FIG. 2, both side ends in the longitudinal direction of the case (1a) are bent at a right angle so that the locked protrusions (1a2)
The grid electrode plate (1c) is provided with a grid electrode surface provided with locking projection insertion holes (1c1) at both ends in the longitudinal direction of the grid electrode plate (1c) corresponding to the installation positions of the locked projections (1a2). Provide a plurality of right angled locking protrusions (1c2). And the protrusion (1a
A structure is used in which the elasticity of the case (1a) is used to connect the 2) by inserting it into the insertion hole (1c1) of the protrusion (1c2).

この構造は熔接などによる方法に比べて組立が簡単であ
るが、その一方グリッド電極板(1c)の厚みが薄いばか
りか幅が小さく、しかも感光ドラム(2)の幅とほぼ同
等の長さをもつため、使用するうちに第2図中に点線に
よって図示するように、被係止突起(1a2)と係止突起
(1c2)による支持点間のグリッド電極(1c)の〔たる
み〕を防ぐことができない。
This structure is easier to assemble than the welding method, but on the other hand, the grid electrode plate (1c) is not only thin but also has a small width, and the length is almost the same as the width of the photosensitive drum (2). Since it has, it prevents the slack of the grid electrode (1c) between the supporting points by the locked projection (1a2) and the locking projection (1c2) as shown by the dotted line in FIG. 2 during use. I can't.

このため〔たるみ〕が大きい場合には、近接配置されて
回転している感光ドラム(2)の表面上にグリッド電極
板(1c)が接触して傷付けたり、また僅かな〔たるみ〕
であっても、グリッド電極板(1c)と感光ドラム(2)
の表面との距離が大きく変わって、目標とする帯電電圧
が得られなくなる欠点がある。
For this reason, when the [slack] is large, the grid electrode plate (1c) comes into contact with the surface of the photosensitive drum (2) that is arranged in proximity and is rotating and scratches, or a slight [slack].
Even the grid electrode plate (1c) and the photosensitive drum (2)
There is a drawback that the target charging voltage cannot be obtained because the distance from the surface of the is greatly changed.

またこれに加えて帯電能力を高くするため、コロナ放電
線(1b)への印加電圧を高くして、イオン化が活発に行
われるようにしたとき、イオン流によりグリッド電極板
(1c)に振動を生ずるので、これによっても前記と同様
な問題を生じるのを避けえない。
In addition to this, in order to increase the charging ability, when the voltage applied to the corona discharge line (1b) is increased so that ionization is actively performed, the grid electrode plate (1c) is vibrated by the ion current. Since this occurs, it is unavoidable that this also causes the same problems as described above.

このような問題は例えばケース(1a)側とグリッド電極
板(1c)側の、それぞれの被係止突起(1a2)と係止突
起(1c2)の数を増して、突起間の距離を短くすること
によって解決できるが、これでは組立が面倒になりコス
トが高くなる。
Such a problem is to increase the number of locked projections (1a2) and locking projections (1c2) on the case (1a) side and the grid electrode plate (1c) side, respectively, to shorten the distance between the projections. Although this can be solved, this makes the assembly troublesome and the cost is high.

一方、電子写真装置においては除電装置(7)として、
ランプ,LEDなどが用いられることが多いが、この場合最
終処理段階である除電ランプ(7)は、第1図のように
帯電装置(1)に隣接して設けられる。このため除電ラ
ンプ(7)からの光で、帯電装置(1)が付設された感
光ドラム(2)の面に侵入して、帯電を妨害することに
よっても目標帯電電圧が得られなくなる問題がある。
On the other hand, in the electrophotographic apparatus, as the static eliminator (7),
Although a lamp, an LED, etc. are often used, the static elimination lamp (7) which is the final processing stage in this case is provided adjacent to the charging device (1) as shown in FIG. Therefore, there is a problem that the target charging voltage cannot be obtained even if the light from the charge eliminating lamp (7) enters the surface of the photosensitive drum (2) provided with the charging device (1) and interferes with the charging. .

(考案の目的) 本考案は上記のようなグリッド電極の〔たるみ〕や振動
による問題、更には除電光の漏れによる帯電の妨害の両
者を、一挙に解決しうる簡単な構造の提供を目的として
なされたものである。
(Object of the Invention) The present invention aims to provide a simple structure capable of solving both the problems due to the slack of the grid electrode and the vibration as described above, and the disturbance of the charging due to the leakage of the static elimination light. It was made.

(問題点を解決するための本考案の手段) 本考案は除電ランプが、スコロトロン帯電装置に隣接し
て設けられることを利用してなされたもので、除電ラン
プの支持板にグリッド電極板のケースへの押付機能と遮
光機能をもたせて、グリッド電極の〔たるみ〕などによ
る問題の解決を図ったものである。次に実施例図によっ
て本考案を具体的に説明する。
(Means of the Present Invention for Solving Problems) The present invention is made by utilizing the fact that the static elimination lamp is provided adjacent to the scorotron charging device, and the case of the grid electrode plate on the support plate of the static elimination lamp. It is intended to solve the problem due to the [slack] of the grid electrode by providing a pressing function and a light blocking function to the. Next, the present invention will be specifically described with reference to the drawings.

(実施例) 第3図は本考案の一実施例を示す部分側面図、第4図は
グリッド電極板押え兼遮光板の斜視図であって、第1
図,第2図と同一符号に同等部分を示す。第3図におい
て(1)はスコロトロン帯電装置で、第1図で前記した
従来装置と同様に、断面コ字状の金属ケース(1a)と、
コロナ放電線(1b)およびグリッド電極板(1c)とから
形成され、かつグリッド電極板(1c)はその長手方向の
両側端に設けた被係止突起差込み穴(1c1)内に、ケー
ス(1a)側の長手方向の両側端に設けた被係止突起(1a
2)を差込むことにより、ケース(1a)の開口面(1a1)
に固定される。
(Embodiment) FIG. 3 is a partial side view showing an embodiment of the present invention, and FIG. 4 is a perspective view of a grid electrode plate retainer / light shield plate.
The same parts as those in FIGS. In FIG. 3, (1) is a scorotron charging device, and like the conventional device described in FIG. 1, a metal case (1a) having a U-shaped cross section,
The grid electrode plate (1c) is formed of the corona discharge wire (1b) and the grid electrode plate (1c), and the grid electrode plate (1c) is inserted into the locking projection insertion holes (1c1) provided at both longitudinal ends of the case (1a). ) Side locked protrusions (1a
By inserting 2), the opening surface (1a1) of the case (1a)
Fixed to.

(10)は本考案の要部であるケース(1a)の長さとほぼ
同長の絶縁性グリッド電極板押え兼遮光板であって、第
4図(a)のように内側面に除電ランプ(7)が固定さ
れる除電ランプ取付板部(10a)と、これとほぼ直角に
設けられた遮光板部(10b)からなる断面逆L字形をな
す。また遮光板部(10b)の高さは、第3図のように除
電ランプ(7)と感光ドラム(2)の表面間の距離が、
所定長さを満足するようにケース(1a)に取付けられた
状態において、遮光板部(10b)の先端(10b1)が感光
ドラム(2)の表面に近接して、除電ランプ(7)の漏
れ光を遮光しうるように選定される。
Reference numeral (10) denotes an insulating grid electrode plate retainer / light shield plate having a length substantially the same as the length of the case (1a) which is the main part of the present invention. As shown in FIG. The discharge lamp mounting plate portion (10a) to which 7) is fixed and the light shielding plate portion (10b) provided at a right angle to the mounting portion have an inverted L-shaped cross section. Further, the height of the light shielding plate portion (10b) is such that the distance between the charge eliminating lamp (7) and the surface of the photosensitive drum (2) is as shown in FIG.
With the tip (10b1) of the light shielding plate (10b) close to the surface of the photosensitive drum (2), the static elimination lamp (7) leaks when it is attached to the case (1a) so as to satisfy the predetermined length. It is selected so that it can block light.

次に(10c)はグリッド電極板の押え突起であって、第
4図(b)のようにグリッド電極板押え兼遮光板(10)
がケース(1a)に固定された状態において、上面(10c
1)がグリッド電極板(1c)をケース(1a)の長さ方向
の一端面に押えこみうるように、遮光板部(10b)の全
長に亘って第4図(a)のように遮光板部(10b)の外
側面に直角に設けられる。(11)はベース電極板押えこ
み用の導電性テープであって、前記のようにベース押え
突起(10c)により押えられた側端部と対向する側端部
において、ケース(1a)とベース電極板(1c)にまたが
って第4図(b)のように貼りつけられて、ベース電極
板(1c)の〔たるみ〕や振動をグリッド電極板押え突起
(10c)と共に防止する。またケース(1a)の被係止突
起(1a2)と、ベース電極板(1c)の係止突起(1c2)に
よる結合部分の電気的接続の不完全を防止する。
Next, (10c) is a pressing protrusion of the grid electrode plate, and as shown in FIG. 4 (b), the grid electrode plate pressing and shading plate (10)
Is fixed to the case (1a), the upper surface (10c
As shown in FIG. 4 (a), the grid electrode plate (1c) can be pressed into the lengthwise end face of the case (1a) so that the grid electrode plate (1c) can be pressed into the light shield plate (10b). It is provided at a right angle to the outer surface of the portion (10b). Reference numeral (11) is a conductive tape for holding the base electrode plate, which has the case (1a) and the base electrode at the side end opposite to the side end pressed by the base holding protrusion (10c) as described above. It is attached to the plate (1c) as shown in FIG. 4 (b) to prevent [slack] and vibration of the base electrode plate (1c) together with the grid electrode plate pressing projections (10c). In addition, incomplete electrical connection between the locked projection (1a2) of the case (1a) and the locking projection (1c2) of the base electrode plate (1c) is prevented.

(考案の効果) 本考案は以上の構成をもつので、グリッド電極板の〔た
るみ〕や振動を確実に防止して、グリッド電極板と感光
体表面の距離を一定に保つことができる。従って、帯電
の安定化が図られ、しかもグリッド電極板が接触による
感光体の損傷を確実に防ぎうる。また同時に除電ランプ
の漏れ光による帯電の妨害も確実に防ぐことができる。
またグリッド電極板の押え突起と遮光部とがグリッド電
極板押え兼遮光板に一体に構成されているので製作組立
が簡単である。
(Effect of the Invention) Since the present invention has the above-mentioned configuration, it is possible to reliably prevent the grid electrode plate from slackening and vibrating, and to keep the distance between the grid electrode plate and the surface of the photoconductor constant. Therefore, the charging can be stabilized and the damage of the photoconductor due to the contact of the grid electrode plate can be surely prevented. At the same time, it is possible to surely prevent the interference of the charging due to the leakage light of the static elimination lamp.
Further, since the pressing projection of the grid electrode plate and the light shielding portion are integrally formed with the grid electrode plate pressing and light shielding plate, the manufacture and assembly are easy.

【図面の簡単な説明】[Brief description of drawings]

第1図および第2図は従来装置の説明図、第3図および
第4図は本考案の一実施例の説明図である。 (1)……スコロトロン帯電装置、(1a)……ケース、
(1a1)……開口部、(1a2)……突起、(1b)……コロ
ナ放電線、(1c)……グリッド電極板、(1c1)……被
係止突起差込み穴、(1c2)……係止突起、(2)……
感光ドラム、(3)……露光装置、(4)……現像装
置、(5)……紙、(6)……クリーニングブレード、
(7)……除電装置(ランプ)、(8)……電源、
(9)……バイアス電源、(10)……グリッド電極板押
え兼遮光板、(10a)……除電ランプ取付板部、(10b)
……遮光板部、(10b1)……先端部、(10c)……グリ
ッド電極板押え突起、(10c1)……上面、(11)……導
電性テープ。
1 and 2 are explanatory views of a conventional device, and FIGS. 3 and 4 are explanatory views of an embodiment of the present invention. (1) …… Scorotron charging device, (1a) …… Case,
(1a1) …… Aperture, (1a2) …… Protrusion, (1b) …… Corona discharge wire, (1c) …… Grid electrode plate, (1c1) …… Locked protrusion insertion hole, (1c2) …… Locking protrusion, (2) ……
Photosensitive drum, (3) ... exposure device, (4) ... developing device, (5) ... paper, (6) ... cleaning blade,
(7) ... static eliminator (lamp), (8) ... power supply,
(9) ...... Bias power supply, (10) ...... Grid electrode plate retainer and light shield plate, (10a) ...... Static electricity removal lamp mounting plate part, (10b)
...... Light-shielding plate part (10b1) ...... tip part, (10c) ...... grid electrode plate holding protrusion, (10c1) ...... top surface, (11) …… conductive tape.

───────────────────────────────────────────────────── フロントページの続き (72)考案者 小泉 清一 山梨県甲府市宮原町1014番地 山梨電子工 業株式会社内 (72)考案者 五味 登 山梨県甲府市宮原町1014番地 山梨電子工 業株式会社内 (56)参考文献 特開 昭58−182649(JP,A) 実開 平1−88952(JP,U) 実開 平2−39254(JP,U) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Seiichi Koizumi, 1014 Miyahara-cho, Kofu-shi, Yamanashi Yamanashi Electronics Co., Ltd. In-house (56) References JP-A-58-182649 (JP, A) Actual Kaihei 1-88952 (JP, U) Actual Kaihei 2-39254 (JP, U)

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】内部に絶縁支持されたコロナ放電線を備え
た金属ケースと、その一端開口部の長手方向の両側端の
複数箇所に設けた被係止突起が、この被係止突起の設置
位置に対応してグリッド電極板の長手方向に設けた、被
係止突起差込み穴内に嵌入されて前記金属ケースの開口
面に結合されたグリッド電極板とよりなる帯電装置と、
これと隣接配置された除電ランプを備えた電子写真装置
において、 前記金属ケースとほぼ同長の遮光板部と、これとほぼ直
角に設けた除電ランプ取付板部を備えた断面逆L字形の
グリッド電極板押え兼遮光板を、その遮光板部により、
遮光板部の先端を感光体表面に近接させて、前記帯電装
置の金属ケースの長手方向の一側面に固定すると共に、
前記遮光板部の前記金属ケースへの固定面の全長には、
一体に固定面と直角に前記グリッド電極板の長手方向の
一側端を前記金属ケースの長手方向の一側端に押し当て
るグリッド電極板押え突起を設け、またこのグリッド電
極板押え突起による押付け側端と対向する側端の金属ケ
ースとグリッド電極板にまたがって導電性テープを貼付
けて、グリッド電極板を金属ケースに固定するようにし
たことを特徴とする電子写真装置。
1. A metal case having a corona discharge wire insulated and supported therein, and locking projections provided at a plurality of positions at both ends in a longitudinal direction of an opening at one end of the metal case. A charging device, which is provided in the longitudinal direction of the grid electrode plate corresponding to the position, and which comprises a grid electrode plate fitted in the locked projection insertion hole and coupled to the opening surface of the metal case;
In an electrophotographic apparatus provided with a static elimination lamp disposed adjacent to this, a grid having an inverted L-shaped cross section, which comprises a light shielding plate portion having substantially the same length as the metal case, and a static electricity elimination lamp mounting plate portion provided at a substantially right angle thereto. The electrode plate retainer and light shield plate is
The tip of the light-shielding plate portion is brought close to the surface of the photoconductor, and fixed to one side surface in the longitudinal direction of the metal case of the charging device,
The total length of the fixing surface of the light shielding plate portion to the metal case,
A grid electrode plate pressing projection for pressing one longitudinal end of the grid electrode plate against one longitudinal end of the metal case at a right angle to the fixed surface is provided, and the pressing side by the grid electrode plate pressing projection is also provided. An electrophotographic apparatus, characterized in that a conductive tape is attached across the metal case and the grid electrode plate at the side opposite to the end to fix the grid electrode plate to the metal case.
JP9899890U 1990-09-25 1990-09-25 Electrophotographic device Expired - Lifetime JPH0741005Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9899890U JPH0741005Y2 (en) 1990-09-25 1990-09-25 Electrophotographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9899890U JPH0741005Y2 (en) 1990-09-25 1990-09-25 Electrophotographic device

Publications (2)

Publication Number Publication Date
JPH0457859U JPH0457859U (en) 1992-05-18
JPH0741005Y2 true JPH0741005Y2 (en) 1995-09-20

Family

ID=31840599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9899890U Expired - Lifetime JPH0741005Y2 (en) 1990-09-25 1990-09-25 Electrophotographic device

Country Status (1)

Country Link
JP (1) JPH0741005Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6511361B2 (en) * 2015-08-03 2019-05-15 シャープ株式会社 Image forming apparatus and image forming method

Also Published As

Publication number Publication date
JPH0457859U (en) 1992-05-18

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