JP2020052296A - バイアス電圧変更回路、作像ユニット及び画像形成装置 - Google Patents
バイアス電圧変更回路、作像ユニット及び画像形成装置 Download PDFInfo
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- 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
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/1665—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
- G03G15/167—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer
- G03G15/1675—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer with means for controlling the bias applied in the transfer nip
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
- G05F3/08—Regulating voltage or current wherein the variable is dc
- G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
- G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
- G05F3/18—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using Zener diodes
-
- 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
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
- G03G15/5004—Power supply control, e.g. power-saving mode, automatic power turn-off
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- 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
- G03G15/80—Details relating to power supplies, circuits boards, electrical connections
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
- G03G21/1642—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements for connecting the different parts of the apparatus
- G03G21/1652—Electrical connection means
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
- G03G21/1661—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements means for handling parts of the apparatus in the apparatus
- G03G21/1676—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements means for handling parts of the apparatus in the apparatus for the developer unit
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00978—Details relating to power supplies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
- H01L29/861—Diodes
- H01L29/866—Zener diodes
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- Automation & Control Theory (AREA)
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Abstract
Description
実施形態では、電子写真方式のカラーの画像形成装置を一例として説明する。
図1は、実施形態に係る画像形成装置200の構成の一例を説明する図である。図1において画像形成装置200は、イエロー、マゼンタ、シアン及びブラック(以下、Y、M、C、Kと示す)のトナー像を作像するための4つの作像ユニット1Y、1M、1C及び1Kを有している。これらは、互いに異なる色のY、M、C及びKトナーによりトナー像を作像し、寿命到達時に交換される。
次に、実施形態に係るバイアス電圧変更回路の機能及び構成について説明する。
本実施形態では、ツェナーダイオードの降伏電圧の公差、及び温度特性を考慮して決定したツェナーダイオードの組み合わせの一例を説明する。
VZ1:51V+4V/−2V
VZ2:200V+12V/−12V
VZ3:100V+6V/−6V
VZ4:100V+6V/−6V
(2)温度特性による変化範囲
VZ1:51V+1V/−2V
VZ2:200V+4V/−10V
VZ3:100V+2V/−5V
VZ4:100V+2V/−5V
上記(1)及び(2)によれば、VZ3とVZ4の最大値の和は216Vであり、VZ1とVZ2の最小値の和の225Vより小さい。従ってツェナーダイオードZ3及びZ4で構成されるツェナーダイオード群のみを機能させ、規制バイアス電圧を低く変更することができる。
2Y、2M、2C、2K 感光体ドラム
3Y、3M、3C、3K クリーニングユニット
4Y、4M、4C、4K 帯電ローラ
10Y、10M、10C、10K トナー供給ローラ
11Y、11M、11C、11K 現像ローラ
12Y、12M、12C、12K 規制ブレード
15K バイアス電圧変更回路
16 中間転写ベルト
151 高圧電源
151a、151b 変圧器
153 高圧電源制御部
200、200a、200b 画像形成装置
Z1〜Z4 ツェナーダイオード
N1〜N14 接点
Claims (4)
- 電源を有する本体部に着脱可能な交換部において、前記電源から前記交換部内の部材に印加されるバイアス電圧を変更するバイアス電圧変更回路であって、
前記部材に電気的に接続され、前記本体部に前記交換部を装着した場合に、前記電源に含まれる少なくとも1つの本体側ツェナーダイオードに対して、並列に接続される少なくとも1つの交換側ツェナーダイオードを有し、
相互に直列に接続された前記交換側ツェナーダイオードの降伏電圧の絶対値の総和は、相互に直列に接続された前記本体側ツェナーダイオードの降伏電圧の絶対値の総和より小さい
バイアス電圧変更回路。 - 電源を有する画像形成装置に着脱可能な作像ユニットであって、
潜像担持体と、
表面に担持したトナーによって前記潜像担持体上の潜像を現像するトナー担持体と、
前記トナー担持体の表面に当接して前記表面上のトナー層厚を規制する規制部材と、
前記電源から前記規制部材に印加される規制バイアス電圧を変更するバイアス電圧変更回路と、を有し、
前記バイアス電圧変更回路は、
前記規制部材に電気的に接続され、前記画像形成装置に前記作像ユニットを装着した場合に、前記電源に含まれる少なくとも1つの本体側ツェナーダイオードに対して並列に接続される少なくとも1つの交換側ツェナーダイオードを有し、
相互に直列に接続された前記交換側ツェナーダイオードの降伏電圧の絶対値の総和は、相互に直列に接続された前記本体側ツェナーダイオードの前記降伏電圧の絶対値の総和より小さい
作像ユニット。 - 前記規制バイアス電圧は、変更前に対し、変更後が低い
請求項2に記載の作像ユニット。 - 請求項2、又は3に記載の作像ユニットを有する画像形成装置。
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JP2018182880A JP7147430B2 (ja) | 2018-09-27 | 2018-09-27 | バイアス電圧変更回路、作像ユニット及び画像形成装置 |
US16/574,436 US10948854B2 (en) | 2018-09-27 | 2019-09-18 | Bias circuit, image formation device and image forming apparatus |
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JP2018182880A JP7147430B2 (ja) | 2018-09-27 | 2018-09-27 | バイアス電圧変更回路、作像ユニット及び画像形成装置 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01142739A (ja) * | 1987-11-30 | 1989-06-05 | Ricoh Co Ltd | 現像器脱着型記録装置 |
JP2005338846A (ja) * | 2004-05-25 | 2005-12-08 | Samsung Electronics Co Ltd | 現像器の電圧供給装置および方法 |
JP2006017949A (ja) * | 2004-06-30 | 2006-01-19 | Kyocera Mita Corp | 液体現像装置 |
US20070053707A1 (en) * | 2005-09-07 | 2007-03-08 | Lexmark International, Inc. | Periodic doctor element field reversal in an electrophotographic device |
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JPH052301A (ja) | 1991-02-08 | 1993-01-08 | Canon Inc | 画像形成装置及びプロセスカートリツジ |
KR100428633B1 (ko) * | 2002-07-10 | 2004-04-28 | 삼성전자주식회사 | 현상기의 전압 공급장치 |
EP1628168B1 (en) | 2004-08-17 | 2014-01-08 | Ricoh Company, Ltd. | Apparatus for controlling the driving of an endless belt for an image forming apparatus |
JP2006171594A (ja) | 2004-12-20 | 2006-06-29 | Ricoh Co Ltd | ベルト駆動制御方法、ベルト駆動制御装置、ベルト装置、画像形成装置及びプログラム |
JP4568609B2 (ja) | 2005-01-11 | 2010-10-27 | 株式会社リコー | 画像形成装置 |
JP4732028B2 (ja) | 2005-01-25 | 2011-07-27 | 株式会社リコー | ベルト駆動制御装置、色ずれ検出方法、色ずれ検出装置及び画像形成装置 |
JP2006209042A (ja) | 2005-01-25 | 2006-08-10 | Ricoh Co Ltd | ベルト駆動制御装置及び画像形成装置 |
JP5880023B2 (ja) | 2011-12-22 | 2016-03-08 | 株式会社リコー | 電源供給回路、画像形成装置 |
JP6202357B2 (ja) | 2012-07-11 | 2017-09-27 | 株式会社リコー | シート材厚み検出装置及びこれを用いた画像形成装置 |
JP6277979B2 (ja) | 2015-03-04 | 2018-02-14 | 京セラドキュメントソリューションズ株式会社 | 画像形成装置 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01142739A (ja) * | 1987-11-30 | 1989-06-05 | Ricoh Co Ltd | 現像器脱着型記録装置 |
JP2005338846A (ja) * | 2004-05-25 | 2005-12-08 | Samsung Electronics Co Ltd | 現像器の電圧供給装置および方法 |
JP2006017949A (ja) * | 2004-06-30 | 2006-01-19 | Kyocera Mita Corp | 液体現像装置 |
US20070053707A1 (en) * | 2005-09-07 | 2007-03-08 | Lexmark International, Inc. | Periodic doctor element field reversal in an electrophotographic device |
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