JPS59147359A - Recording device - Google Patents
Recording deviceInfo
- Publication number
- JPS59147359A JPS59147359A JP58020736A JP2073683A JPS59147359A JP S59147359 A JPS59147359 A JP S59147359A JP 58020736 A JP58020736 A JP 58020736A JP 2073683 A JP2073683 A JP 2073683A JP S59147359 A JPS59147359 A JP S59147359A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- signal
- return
- voltage
- recording part
- 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
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 241000544061 Cuculus canorus Species 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Control Or Security For Electrophotography (AREA)
- Fax Reproducing Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明は画像データ等のインターフェース信号を送出す
る制御部を有す筐体と前記インターフェース信号に応じ
て駆動制御される記録部を有す筐体とが分離されている
記録装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention provides a method in which a housing having a control unit that sends out an interface signal such as image data and a housing having a recording unit that is driven and controlled in accordance with the interface signal are separated. This is related to the recording device that is used.
従来技術
従来、コンピュータ等からの出力画像を記録部により記
録する記録装置（例えばレーザービームプリンタ）のよ
うに、装置単体（例えば記録部だけ）では機能せず複数
の装置を組合わせて初めて機能するようなシステムでは
Ｚ装置間の電気的接続が必要であるため、次の様な問題
が生じる。Conventional technology Conventionally, recording devices (e.g. laser beam printers) that record images output from a computer or the like by a recording section do not function by themselves (for example, only the recording section), but function only when multiple devices are combined. Since such a system requires electrical connection between the Z devices, the following problems arise.
すなわち、複数の装置を組合わせるシステムでは、各装
置の接地点が異なると装置間の筐体電位を同一にできな
いのが普通で、特に装置間の距離が長くなるほどその差
は大きくなる。そのため、例えばコンピュータ等の出力
に接続される信号系のグランド、すなわち信号電流の帰
路線を記録部の筐体に接続すると、コンピュータを有す
筐体の接地電位と記録部の筐体の接地電位との差が装置
間のインターフェース信号に重畳され、正しくインター
フェース信号を伝送できなくなる。そこで信号系のグラ
ンドは記録部の筐体から浮かせて、システム全体で一点
にまとめて接地し、各記録部の筐体は感電防止のため各
装置ごとに接地するのが通例であった。That is, in a system that combines a plurality of devices, if the grounding points of each device are different, it is normal that the case potentials of the devices cannot be made the same, and the difference becomes particularly large as the distance between the devices increases. Therefore, for example, when the ground of the signal system connected to the output of a computer, that is, the return line of the signal current, is connected to the housing of the recording unit, the ground potential of the housing containing the computer and the ground potential of the housing of the recording unit This difference is superimposed on the interface signal between the devices, making it impossible to transmit the interface signal correctly. Therefore, it was customary to raise the ground of the signal system above the housing of the recording section and ground the entire system at one point, and to ground the housing of each recording section for each device to prevent electric shock.
上述した一例を第１図に示す。１はコンビュータの筐体
、２はその内部回路、６は筐体の接地線、４は信号系グ
ランドの接地線、５はインターフエ体、８はその内部回
路、９は記録部の筐体接地線である。An example of the above is shown in FIG. 1 is the case of the computer, 2 is its internal circuit, 6 is the ground wire of the case, 4 is the ground wire of the signal system ground, 5 is the interface body, 8 is the internal circuit, 9 is the case ground of the recording section It is a line.
第１図において、システムの信号系グランドの接地は４
の接地線により一点で接地されている。In Figure 1, the system signal ground is grounded at 4.
It is grounded at one point by the ground wire.
この様に信号系のグランドを記録部の筐体から浮かせて
システム全体で一点Ｋまとめて接地し、記録部の筐体は
装置ごとに接地することで装置間の接地電位の違いによ
るノイズをインターフェース信号から除去することがで
きる。In this way, the ground of the signal system is raised above the housing of the recording section and grounded at one point in the entire system, and the housing of the recording section is grounded for each device, thereby eliminating noise due to differences in ground potential between devices. can be removed from the signal.
ところで、感光ドラムを使用する静電記録装置において
は、ドラムを帯電させたり、現像されたトナーを用紙に
転写する際に、高圧電源より高圧を帯電器に印加する。By the way, in an electrostatic recording device that uses a photosensitive drum, a high voltage is applied to a charger from a high voltage power source when charging the drum or transferring developed toner to paper.
そして、印加された高圧電流は帯電器のケースカバーや
ドラムを通って筐体に流され、筐体の中をリターン電流
が流れて高圧電源に回帰するように構成されている。The applied high-voltage current is passed through the case cover and drum of the charger to the casing, and a return current flows through the casing to return to the high-voltage power source.
この様な静電記録装置を前述のシステムて用いた場合、
高圧電源の出力仰１一端は筐体に接続されてしまうが、
高圧電源内の外圧トランスで１次側。When such an electrostatic recording device is used in the system described above,
One end of the output of the high voltage power supply is connected to the housing,
The primary side is an external voltage transformer inside the high voltage power supply.
２次側間を絶縁し、信号系グランドを昇圧トランスの１
次側に接続することで信号系グランドが筐体に接続され
ることを防止していた。Insulate the secondary side and connect the signal ground to step-up transformer 1.
By connecting to the next side, the signal system ground was prevented from being connected to the case.
また、静電記録装置といっても複写機の様にそれ自ハ（
単体で使用できるものは装置間の接地電位差が生じない
ため問題なかった。Also, even though it is an electrostatic recording device, it has its own features like a copying machine.
There was no problem with devices that could be used alone because there was no difference in ground potential between the devices.
ところが前述した様なシステム（（おいて静電記録装置
の高圧電源に例えばインバータ方式を用いた場合、すな
わち低圧直流を交流化して昇圧トランスで昇圧し、かつ
定電流化を行う場合は、定電流化を行うための定電流回
路の信号系グランドを記録部側の筐体に接続しなければ
ならなし・。However, in the system described above (for example, if an inverter method is used for the high voltage power supply of an electrostatic recording device, that is, if low voltage DC is converted to AC and boosted by a step-up transformer, and the current is made constant, the constant current The signal system ground of the constant current circuit must be connected to the housing on the recording unit side.
これは定電流化を行う場合、記録部筐体を流れてから高
圧電源にもどってくる高圧のリターン電流を検出する必
要があるからである。その−例を第２図に示す。第２図
は不図示のコンビュークト接続されたインバータ方式の
高圧電源を有す記録部の概略図である。尚、第１図と同
様の機能を有すものには同一の符号を付けた。１０はイ
ンノ（−夕方式の高圧電源で定電流回路を含む。１１は
感光ドア ム％ １２は感光ドラムのシャフトに接続
されたブラシ、１３はブラシ１２に接続された筐体接地
線、１４は帯電器カッく−、１５は帯電器カッく−の筐
体接地線、１６は帯電線、１７は高圧ケーブル、１８は
高圧電源出力端子、１９は高圧電源の筐体接地線、１９
Ａは高圧のリターン電流の取り入れ口である。高圧電源
出力端子１８から流れ出た高圧電流は、１部は帯電器カ
ー”−１４から筐体接地線１５へ、残りはドラム１１か
ら筐体接地線１６へ流れ筐体中を通って端子１９Ａかも
高圧電源１０にもどってくる。又、高圧電源１０を制御
する制御回路６６はインターフェース信号線５及びその
帰路線６を介して不図示のコンピュータに接続されてい
る。This is because when performing constant current, it is necessary to detect the high-voltage return current that flows through the recording unit housing and then returns to the high-voltage power supply. An example is shown in FIG. FIG. 2 is a schematic diagram of a recording section having an inverter-type high-voltage power source connected in a compact manner (not shown). Components having the same functions as those in FIG. 1 are given the same reference numerals. 10 is an Inno (-evening type) high-voltage power supply that includes a constant current circuit. 11 is a photosensitive drum. 12 is a brush connected to the shaft of the photosensitive drum. 13 is a housing ground wire connected to the brush 12. 14 is a 15 is a charger cuckoo case grounding wire, 16 is a charging wire, 17 is a high voltage cable, 18 is a high voltage power supply output terminal, 19 is a high voltage power supply case grounding wire, 19
A is a high voltage return current intake. Part of the high voltage current flowing from the high voltage power supply output terminal 18 flows from the charger car 14 to the case ground line 15, and the rest flows from the drum 11 to the case ground line 16, passing through the case and passing through the terminal 19A. It returns to the high-voltage power supply 10. Further, a control circuit 66 that controls the high-voltage power supply 10 is connected to a computer (not shown) via the interface signal line 5 and its return line 6.
次に高圧電源１０の内部について説明する。２０は昇圧
トランス、２１は整流器、２２は平滑コンデンサ、２ろ
は放電防止抵抗、２４はリターン電流検出用抵抗、２５
は差動増幅器、２６はレベル可変用抵抗、２７はトラン
ス２０の１次側電圧を変化させるトランジスタ、２８は
バイパスコンデンサ）２９は変調用トランジスタ、３０
は発振器、６１は低圧電源端子、ろ２は信号系グランド
であり、制御回路６６を介して不図示のコンピュータの
信号系グランドに接続されている。発振器３０で駆動さ
れるトランジスタ２９が外圧トランス２０の１次側電圧
を変調する。その電圧振幅を変化させるのがトランジス
タ２７で、そのベースは差動増幅器２５で駆動される。Next, the inside of the high voltage power supply 10 will be explained. 20 is a step-up transformer, 21 is a rectifier, 22 is a smoothing capacitor, 2 is a discharge prevention resistor, 24 is a return current detection resistor, 25
26 is a differential amplifier, 26 is a level variable resistor, 27 is a transistor that changes the primary side voltage of the transformer 20, 28 is a bypass capacitor) 29 is a modulation transistor, 30
is an oscillator, 61 is a low-voltage power supply terminal, and filter 2 is a signal ground, which is connected to the signal ground of a computer (not shown) via a control circuit 66. A transistor 29 driven by an oscillator 30 modulates the primary voltage of the external pressure transformer 20. A transistor 27 changes the voltage amplitude, and its base is driven by a differential amplifier 25.
差動増幅器２５はあらかじめ可変抵抗器２６で設定され
た電圧と、抵抗２４の両端に生じる高圧リターン電流に
比例した電圧との差を出力する。これにより常に一定の
尚圧出力を得ることができる。尚、定電流回路は抵抗２
４、差動増幅器２５、可変抵抗２６、トランジスタ２７
等で構成される。第２図の記録部では制御回路３乙によ
りトランジスタ３３をオン／′オンして、高圧電源１０
（定電流回路）を記録シーケンスに応じて制御する。３
４は制御部３６から送出される制御信号の入力端子であ
イ・１．前述した様に制御回路の信号系グランドはコン
ピュータの信号系グランドと接続されている。従って定
電流回路の信号系グランドが端子１９Ａで筐体に接続さ
れていれば、第１図で説明した様に記録装置の信号系グ
ランドを記録部筐体から溶かすことができなくなる。The differential amplifier 25 outputs the difference between the voltage set in advance by the variable resistor 26 and a voltage proportional to the high voltage return current generated across the resistor 24. This makes it possible to always obtain a constant pressure output. In addition, the constant current circuit has resistor 2
4, differential amplifier 25, variable resistor 26, transistor 27
Consists of etc. In the recording section of FIG. 2, the control circuit 3B turns on/off the transistor 33,
(constant current circuit) according to the recording sequence. 3
4 is an input terminal for a control signal sent from the control unit 36.1. As mentioned above, the signal ground of the control circuit is connected to the signal ground of the computer. Therefore, if the signal system ground of the constant current circuit is connected to the housing through the terminal 19A, it becomes impossible to melt the signal system ground of the recording device from the recording unit housing as explained in FIG.
目 的
本発明の目的は上記従来例の欠点を除去するとともに、
コンピュータ等の制御部から出力される画像信号等のイ
ンターフェース信号が正確に記録部へ伝送される記録装
置を提供することにある。Purpose The purpose of the present invention is to eliminate the drawbacks of the above conventional example, and
An object of the present invention is to provide a recording device in which an interface signal such as an image signal output from a control section of a computer or the like is accurately transmitted to a recording section.
実施例 以下本発明の実施例を図面を参照して説明する。Example Embodiments of the present invention will be described below with reference to the drawings.
第６図は本発明の一実施例である記録装置の概略図であ
り、主に記録部の概略構成を示したものである。尚、第
２図と同様の機能を有すものには同じ符号をつけた。［
図において、４０は記録部を駆動するため制御される高
圧電源であり、第２図で示した高圧電源１０と同様の定
電流回路を６個内蔵している。尚、第２図と同様コンピ
ュータに接続された制御回路により記録シーケンスに応
じて制御される。また各出力を１８Ａ 、 １８Ｂ、１
８Ｃとする。出力１８Ｂは交流のため整流器２１及びコ
ンデンサ２２は除いである。FIG. 6 is a schematic diagram of a recording apparatus that is an embodiment of the present invention, mainly showing the schematic configuration of the recording section. Components having the same functions as those in FIG. 2 are given the same reference numerals. [
In the figure, reference numeral 40 denotes a high-voltage power supply that is controlled to drive the recording section, and includes six constant current circuits similar to the high-voltage power supply 10 shown in FIG. 2. Incidentally, as in FIG. 2, control is performed according to the recording sequence by a control circuit connected to a computer. Also, each output is 18A, 18B, 1
It will be 8C. Since the output 18B is an alternating current, the rectifier 21 and capacitor 22 are excluded.
４１は現像器、４２は現像スリーブ、４６は筐体から電
気的に絶縁された現像スリーブの電極、４４と４５は用
紙を供給するガイド板、１６Ａ。41 is a developing device, 42 is a developing sleeve, 46 is an electrode of the developing sleeve electrically insulated from the housing, 44 and 45 are guide plates for feeding paper, and 16A.
１６Ｂは帯電線、１４Ａ、１４Ｂは筐体から電気的に絶
縁された帯電器カバー、４’６．４７．４８は高圧のリ
ターン線である。16B is a charging wire, 14A and 14B are charger covers electrically insulated from the housing, and 4'6.47.48 is a high voltage return line.
高圧電源４０で発生した高圧は１８Ａ、ＩＢＢ。The high voltage generated by the high voltage power supply 40 is 18A, IBB.
１８Ｃの出力端子から各帯電器１６Ａ、１６Ｂ及び現像
スリーブ４２に加わる。そしてこの高圧電流は帯電器か
らＭ電器カバー１４Ａ、１４Ｂまたはドラム１１にリタ
ーン電流として流れ、リターン線４６，４７．４８を通
って高圧電源の端子１９Ａにもどる。また現像スリーブ
４２に流れた高圧電流もドラム１１に流れリターン線４
７を通−）て端子１９Ａにもどる。It is applied to each charger 16A, 16B and the developing sleeve 42 from the output terminal of 18C. This high-voltage current flows from the charger to the M electric appliance covers 14A, 14B or the drum 11 as a return current, and returns to the terminal 19A of the high-voltage power supply through the return wires 46, 47, 48. In addition, the high voltage current that has flowed through the developing sleeve 42 also flows through the return line 4 to the drum 11.
7 -) and returns to terminal 19A.
この様に本実施例においては、従来筐体に接続されてい
た感光ドラムシャフトのブラシや帯電器カバーを電気的
に絶縁し、電線で高圧電源のリターン端子に接続する様
構成したので、高圧電流を筐体に流さなくてすむように
なった。In this way, in this embodiment, the brush of the photosensitive drum shaft and the charger cover, which were conventionally connected to the housing, are electrically insulated and connected to the return terminal of the high-voltage power supply with an electric wire. It is no longer necessary to drain the liquid into the housing.
そのため信号系グランドと記録部の筐体接地を完全に分
離でき、記録部とコンピュータ間のインターフェース信
号に筒体電位差によるノイズが混入することが無くなっ
た。Therefore, the signal system ground and the housing ground of the recording section can be completely separated, and noise due to the difference in cylinder potential is no longer mixed into the interface signal between the recording section and the computer.
また記録部筐体には高圧のリターン電流ばかりでなく、
装置の商用電源取入口から入り込んでくるノイズ電流も
流れており、高圧電源のリターン電流検出抵抗２４の両
端にそのノイズ電圧が発生することがあったが、その問
題も解決され安定した定電流制御が行えるようになった
。In addition, the recording unit housing not only receives high-voltage return current, but also
Noise current coming in from the commercial power supply inlet of the device also flows, and that noise voltage sometimes occurs across the return current detection resistor 24 of the high voltage power supply, but this problem has been resolved and stable constant current control has been achieved. can now be done.
尚、本実施例ではリターン線４６ 、４７ 、４８は電
線で説明したが、筐体から絶縁された導電体であれば良
い。In this embodiment, the return wires 46, 47, and 48 are described as electric wires, but they may be any conductor as long as they are insulated from the casing.
また本発明は冒圧電のに限らず記録部を駆動側イ４１す
るため、従来筐体中にリターン電流を流していたものな
らば十分応用できるものである。Further, since the present invention is not limited to the voltage applied to the drive side of the recording section, it can be applied to any device in which a return current is conventionally passed through the casing.
効 果
以上説明した様に本発明によれば、ノイズの除去された
インターフェース信号を記録部に伝送−「ることができ
るので、安定した画１象出カを得るこ第１図はコンピュ
ータと記録部を接続する場合の接地方法を示す図、第２
図はインバータ方式の高圧電源を有す記録部の概略図、
第５図は本実施例における記録装置の概略図である。Effects As explained above, according to the present invention, the interface signal from which noise has been removed can be transmitted to the recording section, so that stable image output can be obtained. Diagram showing the grounding method when connecting the parts, 2nd
The figure is a schematic diagram of a recording unit with an inverter-type high-voltage power supply.
FIG. 5 is a schematic diagram of the recording apparatus in this embodiment.
ここで１はコンピュータの筐体、７は記録部の筐体）５
はインターフェース信号線、６はインターフェース信号
の帰路線、１１は感光ドラム、４０は高圧電源、１４Ａ
、１４Ｂは帯電器カバー、１６Ａ、１６］３は帯電線、
４２は現像スリーブである。Here, 1 is the computer case, 7 is the storage unit case)5
is an interface signal line, 6 is a return line for interface signals, 11 is a photosensitive drum, 40 is a high voltage power supply, 14A
, 14B is a charger cover, 16A, 16]3 is a charging wire,
42 is a developing sleeve.
Claims (1)
を有す筐体と前記インターフェース信号に応じて駆動制
御される記録部を有す筐体とが分離されている記録装置
において、前記記録部を駆＃するため制御される電源等
のリターン電流が流れる部分を前記記録部の筐体から電
気的に絶縁する様構成したことを特徴とする記録装置。In a recording apparatus in which a housing having a control unit that sends an interface signal such as image data and a housing having a recording unit that is driven and controlled in accordance with the interface signal are separated, the recording unit is driven. A recording apparatus characterized in that a portion through which a return current flows from a power source or the like that is controlled for this purpose is electrically insulated from a casing of the recording section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58020736A JPS59147359A (en) | 1983-02-10 | 1983-02-10 | Recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58020736A JPS59147359A (en) | 1983-02-10 | 1983-02-10 | Recording device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59147359A true JPS59147359A (en) | 1984-08-23 |
Family
ID=12035476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58020736A Pending JPS59147359A (en) | 1983-02-10 | 1983-02-10 | Recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59147359A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019059084A1 (en) * | 2017-09-19 | 2019-03-28 | 日本電産株式会社 | Unpiloted moving body |
| CN110014913A (en) * | 2017-09-19 | 2019-07-16 | 日本电产株式会社 | Unmanned moving body |
-
1983
- 1983-02-10 JP JP58020736A patent/JPS59147359A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019059084A1 (en) * | 2017-09-19 | 2019-03-28 | 日本電産株式会社 | Unpiloted moving body |
| CN110014913A (en) * | 2017-09-19 | 2019-07-16 | 日本电产株式会社 | Unmanned moving body |
| CN111032419A (en) * | 2017-09-19 | 2020-04-17 | 日本电产株式会社 | Unmanned moving body |
| JPWO2019059084A1 (en) * | 2017-09-19 | 2020-11-05 | 日本電産株式会社 | Unmanned moving body |
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