JPS60220370A - Electrifier for electrophotographic printer - Google Patents

Electrifier for electrophotographic printer

Info

Publication number
JPS60220370A
JPS60220370A JP7742384A JP7742384A JPS60220370A JP S60220370 A JPS60220370 A JP S60220370A JP 7742384 A JP7742384 A JP 7742384A JP 7742384 A JP7742384 A JP 7742384A JP S60220370 A JPS60220370 A JP S60220370A
Authority
JP
Japan
Prior art keywords
printed circuit
circuit board
wire
electrifier
charger
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
Application number
JP7742384A
Other languages
Japanese (ja)
Inventor
Koichi Ubue
生柄　耕一
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7742384A priority Critical patent/JPS60220370A/en
Publication of JPS60220370A publication Critical patent/JPS60220370A/en
Pending legal-status Critical Current

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
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To reduce a danger of cutting of a wire to replace the wire easily by stretching the wire between feeding terminals of a printed circuit board and making the printed circuit board attachable to and detachable from an electrifier case. CONSTITUTION:Holes 72 and 73 where end parts of a wire 1 for electrostatic charge are held are provided in both end parts of a printed circuit board 71, and copper foil patterns 74 and 75 are formed on the surface of this board around these holes. The wire 1 has both end parts inserted into a pair of wire holding holes 72 and 73 of the printed circuit board 71 and a tension is applied to this wire, and the wire 1 is fixed onto copper foil patterns 74 and 75 in this state by soldering. An electrifier 8 has a case 81 where a printed circuit board unit 7 is stored, and the electrifier case 81 is provided with a board holder 82 for keeping the stored printed circuit board 7 vertical and two flat springs 83 which press the printed circuit board unit to this holder 82. When the electrifier 8 is attached to a prescribed position of an electrophotographic printer, a voltage is supplied to the wire 1 for electrostatic charge from a printer-side connector through a feeding terminal 76 of the printed circuit board unit 7.

Description

【発明の詳細な説明】 Ｔａ）　発明の技術分野 本発明は電子写真印刷装置における帯電器に係り、さら
に詳細には帯電用ワイヤーの張架構造に関する。DETAILED DESCRIPTION OF THE INVENTION Ta) Technical Field of the Invention The present invention relates to a charger in an electrophotographic printing apparatus, and more particularly to a tension structure for a charging wire.

（ｂｌ　従来技術と問題点 電子写真印刷装置においては回転している感光ドラムの
表面に帯電器からのコロナ放電により一様に電荷を与え
て帯電させ、続いて印字データにより変調されたレーザ
ー光を前記感光ドラムに照射することにより、該ドラム
上では光の照射された所が導電状態になり電荷が消滅す
る。現像部でプラスに帯電されたトナーが前記ドラム上
の潜像に吸着されトナー像が形成される。さらに印刷用
紙に転写され、熱によりトナーを用紙に定着させること
によって印刷がなされる。(bl) Prior Art and Problems In an electrophotographic printing device, the surface of a rotating photosensitive drum is uniformly charged by corona discharge from a charger, and then a laser beam modulated by print data is applied to the surface of a rotating photosensitive drum. By irradiating the photosensitive drum, the area on the drum that is irradiated with light becomes conductive and the charge disappears.In the developing section, the positively charged toner is attracted to the latent image on the drum, forming a toner image. The toner is then transferred to printing paper and printed by fixing the toner to the paper using heat.

第１図は感光ドラムに電荷を与える帯電器の構造を示す
図である。図において、帯電用ワイヤー１は帯電器ケー
ス６の両端部に保持された１対の絶縁性ホルダー３およ
び４にスプリング２を介して張架されれる。しかして一
方のスプリング２は電圧供給用の端子５に接続され、外
部コネクタ（図示せず）を経由して高電圧が印加される
。FIG. 1 is a diagram showing the structure of a charger that charges a photosensitive drum. In the figure, a charging wire 1 is stretched across a pair of insulating holders 3 and 4 held at both ends of a charger case 6 via a spring 2. One spring 2 is connected to a voltage supply terminal 5, and a high voltage is applied via an external connector (not shown).

ところで、帯電用ワイヤー１は６０〜１００μｍと細く
て切れ易く、またトナー等で汚れ易い。このため、しば
しば張り替えが必要となる。しかし、従来の張架方法で
は帯電用ワイヤー１をスプリング２に巻きつけていたた
め、その部分でワイヤーに傷がつき切れやすかった。ま
た帯電用ワイヤー１の張り替えには長時間を要するため
、交換用の帯電器を保守用として持たねばならない等の
問題があった。By the way, the charging wire 1 is as thin as 60 to 100 μm and is easily cut, and is also easily stained with toner and the like. For this reason, reupholstery is often necessary. However, in the conventional tensioning method, since the charging wire 1 was wound around the spring 2, the wire was easily damaged and broken at that part. Furthermore, since it takes a long time to replace the charging wire 1, there are problems such as having to carry a replacement charger for maintenance.

（０）　発明の目的 本発明は上記従来の欠点に鑑み、ワイヤーの切断の危険
性が少なく、かつワイヤーの交換を簡単に行える帯電器
の提供を目的とする。(0) Purpose of the Invention In view of the above-mentioned drawbacks of the conventional art, an object of the present invention is to provide a charger in which the risk of wire breakage is low and the wire can be easily replaced.

（ｄ）　発明の構成 本発明は上記のような目的を達成するために、ワイヤー
をプリント基板の給電用端子間に張架するとともに、該
プリント基板を帯電器ケースに着脱できるようにしたこ
とを特徴とする。(d) Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a structure in which a wire is stretched between the power supply terminals of a printed circuit board, and the printed circuit board is made detachable from a charger case. Features.

＋ｅ）　発明の実施例 以下、本発明の一実施例について図を参照して詳細に説
明する。第２図は本発明の帯電器８におけるワイヤー張
架用のプリント基板ユニット７の構造を示す。プリント
基板７１の両端部にはワイヤー端部を保持する孔７２お
よび７３が設けられ、これらの孔の周囲の基板表面には
銅箔パターン７４および７５形成されている。帯電用ワ
イヤー１は前記プリント基板７１に対し、その両端部を
１対のワイヤー保持用孔７２．７３に挿入して張力をか
けた状態で銅箔パターン７４．７５上に半田付は固定さ
れている。+e) Embodiment of the Invention Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 shows the structure of the printed circuit board unit 7 for wire tension in the charger 8 of the present invention. Holes 72 and 73 for holding wire ends are provided at both ends of the printed circuit board 71, and copper foil patterns 74 and 75 are formed on the surface of the board around these holes. The charging wire 1 is inserted into the pair of wire holding holes 72.73 at both ends of the printed circuit board 71, and is soldered onto the copper foil pattern 74.75 under tension. There is.

また、プリント基板７１の端部には装置側のコネクタ（
図示せず）と結合して電圧を供給される給電端子７６が
設けられ、該給電端子７６は前記一方の銅箔パターン７
４と接続されている。In addition, the end of the printed circuit board 71 is equipped with a device-side connector (
A power supply terminal 76 is provided which is connected to the copper foil pattern 7 (not shown) and is supplied with a voltage.
4 is connected.

第３図は前記プリント基板ユニット７を取りつけた本発
明の帯電器８の１例構造を一部切断して示した斜視図で
ある。帯電器８は前記プリント基板ユニット７を収容す
るケース８１、を有し、該帯電器ケース８１には収容さ
れたプリント基板ユニット７を垂直に保つための基板ホ
ルダー８２とこれに同基板ユニットを圧接する２つの板
バネ８３が設けられている。さて、このように構成され
た帯電器８を電子写真印刷装置の所定個所に取りつける
と、装置側のコネクタよりプリント基板ユニット７の給
電端子７６を経由して帯電用ワイヤー１に電圧が供給さ
れ、従来同様に感光ドラムに対する給電作用が行われる
。一方、帯電用ワイヤー１の切断時にはプリント基板ユ
ニット７のみを交換すればよく、その作業は短時間にて
可能である。FIG. 3 is a partially cutaway perspective view showing an example structure of the charger 8 of the present invention to which the printed circuit board unit 7 is attached. The charger 8 has a case 81 that houses the printed circuit board unit 7, and the charger case 81 includes a board holder 82 for keeping the housed printed circuit board unit 7 vertical, and a board holder 82 to which the board unit is pressed. Two leaf springs 83 are provided. Now, when the charger 8 configured as described above is attached to a predetermined location of the electrophotographic printing device, voltage is supplied to the charging wire 1 from the connector on the device side via the power supply terminal 76 of the printed circuit board unit 7. Power is supplied to the photosensitive drum in the same manner as in the prior art. On the other hand, when cutting the charging wire 1, only the printed circuit board unit 7 needs to be replaced, and this work can be done in a short time.

（ｆｌ　発明の効果 以上、詳細に説明したように本発明によれば、帯電用ワ
イヤーがプリント基板に半田付けして張架されることに
より切断しにくくなり、またプリント基板にユニット化
することにより短時間で交換できるといった効果がある
。(fl) Effects of the Invention As explained in detail above, according to the present invention, the charging wire is soldered to the printed circuit board and stretched, making it difficult to cut. It has the advantage of being able to be replaced in a short time.

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

第１図は従来の帯電器の構成を示す斜視図、第２図およ
び第３図は本発明の一実施例を説明するための帯電用プ
リント基板ユニットと帯電器全体の構成を示す斜視図で
ある。 図において、１は帯電用ワイヤー、２はスプリング、３
および４は絶縁性のホルダー、５は電圧供給用端子、６
および８１は帯電器ケース、７はプリント基板ユニット
、７１はプリント基板、７２および７３はワイヤー保持
用孔、７４および７５は銅箔パターン、７６は給電端子
、８は帯電器、８２は基板ホルダ・−１８３は板バネで
ある。 第１図 第　３図 ２FIG. 1 is a perspective view showing the structure of a conventional charger, and FIGS. 2 and 3 are perspective views showing the structure of a charging printed circuit board unit and the entire charger for explaining an embodiment of the present invention. be. In the figure, 1 is a charging wire, 2 is a spring, and 3
and 4 is an insulating holder, 5 is a voltage supply terminal, 6
81 is a charger case, 7 is a printed circuit board unit, 71 is a printed circuit board, 72 and 73 are wire holding holes, 74 and 75 are copper foil patterns, 76 is a power supply terminal, 8 is a charger, 82 is a board holder -183 is a leaf spring. Figure 1 Figure 3 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 光の照射により潜像を形成する感光ドラムの表面に均一
な電荷を帯電させるための帯電器であって、−表面に外
部の給電回路と接続される１対の導電体が所定間隔隔て
て設けられ、帯電器ケースに着脱自在なプリント基板と
、該プリント基板の１対の導電体間にその両端部を接続
して張架された帯電用ワイヤーとから成ることを特徴と
する電子写真印刷装置用帯電器。A charger for uniformly charging the surface of a photosensitive drum that forms a latent image by irradiation with light, wherein a pair of conductors connected to an external power supply circuit are provided on the surface at a predetermined interval. An electrophotographic printing device comprising: a printed circuit board which is detachably attached to a charger case; and a charging wire stretched between a pair of conductors of the printed circuit board with both ends thereof connected. Charger for use.
JP7742384A 1984-04-16 1984-04-16 Electrifier for electrophotographic printer Pending JPS60220370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7742384A JPS60220370A (en) 1984-04-16 1984-04-16 Electrifier for electrophotographic printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7742384A JPS60220370A (en) 1984-04-16 1984-04-16 Electrifier for electrophotographic printer

Publications (1)

Publication Number Publication Date
JPS60220370A true JPS60220370A (en) 1985-11-05

Family

ID=13633556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7742384A Pending JPS60220370A (en) 1984-04-16 1984-04-16 Electrifier for electrophotographic printer

Country Status (1)

Country Link
JP (1) JPS60220370A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341667A2 (en) * 1988-05-09 1989-11-15 Mita Industrial Co., Ltd. Image-forming machine
EP1450215A1 (en) * 1999-11-30 2004-08-25 Océ Printing Systems GmbH Device for exchanging a corotron wire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341667A2 (en) * 1988-05-09 1989-11-15 Mita Industrial Co., Ltd. Image-forming machine
EP1450215A1 (en) * 1999-11-30 2004-08-25 Océ Printing Systems GmbH Device for exchanging a corotron wire

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