WO2013139059A1 - Dispositif de développement - Google Patents

Dispositif de développement Download PDF

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Publication number
WO2013139059A1
WO2013139059A1 PCT/CN2012/074263 CN2012074263W WO2013139059A1 WO 2013139059 A1 WO2013139059 A1 WO 2013139059A1 CN 2012074263 W CN2012074263 W CN 2012074263W WO 2013139059 A1 WO2013139059 A1 WO 2013139059A1
Authority
WO
WIPO (PCT)
Prior art keywords
powder
developing roller
roller
developing
component carbon
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.)
Ceased
Application number
PCT/CN2012/074263
Other languages
English (en)
Chinese (zh)
Inventor
曹国柱
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.)
ZHUHAI BENMA PRINTMAX IMAGINE CO Ltd
Original Assignee
ZHUHAI BENMA PRINTMAX IMAGINE 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 ZHUHAI BENMA PRINTMAX IMAGINE CO Ltd filed Critical ZHUHAI BENMA PRINTMAX IMAGINE CO Ltd
Publication of WO2013139059A1 publication Critical patent/WO2013139059A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0803—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer in a powder cloud

Definitions

  • the present invention relates to a developing device, and more particularly to a developing device in a laser printer.
  • Contact development is one of the main development methods for laser printing. Most of the laser printers such as Samsung and Brother have adopted this development method. Color printers such as Hewlett-Packard and Canon have also adopted this technology.
  • the powder feeding roller is often made of a porous material having a certain resistance.
  • the feed roller is fed with a voltage of about -500 volts, the toner can be made to be negatively charged.
  • the developing roller is mostly a metal core rubber roller and has a large body resistance. When a voltage of -300 V is applied thereto, the charged toner on the powder supply roller is transferred to a developing roller having a relatively high potential.
  • the elastic metal scraper maintains a very small gap with the developing roller, which is also applied with an alternating voltage that activates the toner and scrapes it into a uniform, thin layer in constant oscillation.
  • the photosensitive drum can be obtained under the action of a charging roller -1400V high pressure - At a surface voltage of 800V, the potential of the pattern portion after exposure drops to –50V (this is the residual potential), while the non-graphic portion (white area) remains at –800V, approximately on the developing roller – 300V toner is rejected by –800V, but can be - 50V attracts and develops, this is the development process.
  • This development method requires the photosensitive drum to be in direct contact with the developing roller, which has a large damage to the photosensitive drum, a large rotating torque, and high precision requirements of each component, resulting in high manufacturing cost and unstable printing quality.
  • the present invention provides a developing device for a laser printer having a small torque, high operational stability, and low cost.
  • a developing device characterized by:
  • the utility model comprises a powder silo, a photosensitive drum, a developing roller and a powder controlling device, wherein the powder silo is provided with a one-component carbon powder and a powder feeding roller capable of sending the one-component carbon powder to the developing roller, and the photosensitive drum and the developing roller
  • the spacing d is 0 ⁇ d ⁇ 0.08 mm
  • the one-component carbon powder attached to the developing roller is charged by the friction of the powder controlling device, and the charged one-component carbon powder passes through the surface of the photosensitive drum
  • the electrostatic adsorption force is adsorbed to the latent image area.
  • the distance d between the photosensitive drum and the developing roller is 0.03 ⁇ d ⁇ 0.05 mm.
  • a terminal voltage opposite to that of the one-component carbon powder is applied to the developing roller.
  • the powder feeding roller includes a metal core, and the metal core is wrapped with an electrically conductive elastomer.
  • the powder feeding roller is applied with a terminal voltage which is electrically equivalent to that of the one-component carbon powder.
  • the developing roller employs a metal roller.
  • the developing roller is mainly composed of a conductive plastic layer or a rubber layer coated on the iron core and the iron core.
  • the powder control device adopts a metal powder control knife.
  • the invention has the beneficial effects that the developing roller and the photosensitive drum of the developing device of the structure do not need to be in contact, and the single-component carbon powder after being frictionally charged by the powder controlling device can be assisted without any additional electric or magnetic force. Only by the electrostatic attraction force of the latent image area on the surface of the photosensitive drum, it is possible to jump to the latent image area to complete the development.
  • the developing roller and the photosensitive drum can realize development without contact, avoiding abrasion and large rotational torque caused by mutual contact, and at the same time reducing manufacturing precision of each component, thereby reducing manufacturing cost and improving print quality.
  • Figure 1 is a schematic view of the structure of the present invention.
  • the present invention discloses a developing device comprising a powder chamber 1, a photosensitive drum 2, a developing roller 3, and a powder controlling device.
  • the powder container 1 is provided with a one-component carbon powder 4 and capable of discharging a single-component toner. 4 is sent to the powder feeding roller 5 on the developing roller 3, the distance d between the photosensitive drum 2 and the developing roller 3 is 0 ⁇ d ⁇ 0.08 mm, and the one-component carbon powder 4 adhering to the developing roller 3 is controlled by powder
  • the device is charged with friction and the charged one-component carbon powder 4 is adsorbed to the latent image region by the electrostatic attraction force of the latent image area on the surface of the photosensitive drum 2.
  • the distance control between the developing roller 3 and the photosensitive drum 2 is critical, and the optimum spacing d between the photosensitive drum 2 and the developing roller 3 is tested. 0.03 ⁇ d ⁇ 0.05 mm.
  • the powder control device adopts the metal powder control knife 6, because the one-component carbon powder 4 on the surface of the developing roller 3 is required to be thin, and must be made of a material having a high modulus of elasticity, and the metal is a relatively suitable material.
  • the metal powder controlling blade 6 can increase the frictional charge amount of the one-component carbon powder 4, and the friction between the metal powder controlling blade 6 and the one-component carbon powder 4 can be made.
  • the one-component toner 4 carries a large amount of electric charge.
  • the developing roller 3 is most preferably a metal roller.
  • the metal roller is usually processed by an aluminum tube, and the surface is usually treated with a surface treatment such as electroplating, oxidation or chemical coating to prevent rust or corrosion.
  • the metal has good processing properties, is easy to achieve the required precision, and has high stability, so that it is easy to achieve a small pitch between the developing roller 3 and the photosensitive drum 2.
  • the developing roller 3 is applied with a terminal voltage opposite to that of the one-component carbon powder 4, by which the adsorption force of the developing roller 3 on the one-component carbon powder 4 can be increased, thereby preventing the flying powder and the bottom. gray.
  • the powder feeding roller 5 adopts a metal core, and the metal core is wrapped with an elastic body having conductivity, and the powder feeding roller 5 is applied with the one-component carbon powder 4 The terminal voltage of the same charge electrical property.
  • the working process of the device is as follows: the one-component carbon powder 4 is adsorbed from the powder silo 1 to the developing roller 3 through the powder feeding roller 5, and the metal powder controlling knife 6 in contact with the developing roller 3 scrapes the one-component carbon powder 4 into uniform A very thin layer causes the one-component toner 4 to be charged, and a voltage is applied to the developing roller 3, which ensures that the charged one-component carbon powder 4 can be adsorbed to the surface of the developing roller 3, preventing "" The situation of flying powder” occurs.
  • the charged single-component toner 4 passes through the surface latent image of the photosensitive drum 2 without any other applied electric or magnetic force.
  • the electrostatic adsorption force of the region jumps to the latent image area to complete the development.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
PCT/CN2012/074263 2012-03-20 2012-04-18 Dispositif de développement Ceased WO2013139059A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201220105595 CN202512365U (zh) 2012-03-20 2012-03-20 一种显影装置
CN201220105595.3 2012-03-20

Publications (1)

Publication Number Publication Date
WO2013139059A1 true WO2013139059A1 (fr) 2013-09-26

Family

ID=47064833

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/074263 Ceased WO2013139059A1 (fr) 2012-03-20 2012-04-18 Dispositif de développement

Country Status (2)

Country Link
CN (1) CN202512365U (fr)
WO (1) WO2013139059A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103048906A (zh) * 2012-12-25 2013-04-17 珠海天威飞马打印耗材有限公司 电子照相成像方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947200A (en) * 1988-05-19 1990-08-07 Hitachi, Ltd. Developing device and multi-color recording apparatus
CN1490678A (zh) * 2002-07-24 2004-04-21 三星电子株式会社 形成多色图像的装置和方法
US20060039717A1 (en) * 2004-08-20 2006-02-23 Satoshi Hatori Method and apparatus for image forming
US20060057487A1 (en) * 2004-09-10 2006-03-16 Ricoh Company, Limited. Developer for use in electrophotography, image forming method and process cartridge
CN1983058A (zh) * 2005-11-22 2007-06-20 三星电子株式会社 图像显影装置和使用该装置的成像装置
CN101893838A (zh) * 2010-05-05 2010-11-24 珠海天威飞马打印耗材有限公司 处理盒
CN101986214A (zh) * 2010-11-30 2011-03-16 珠海市奔码打印耗材有限公司 一种接触式显影硒鼓的新显影装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947200A (en) * 1988-05-19 1990-08-07 Hitachi, Ltd. Developing device and multi-color recording apparatus
CN1490678A (zh) * 2002-07-24 2004-04-21 三星电子株式会社 形成多色图像的装置和方法
US20060039717A1 (en) * 2004-08-20 2006-02-23 Satoshi Hatori Method and apparatus for image forming
US20060057487A1 (en) * 2004-09-10 2006-03-16 Ricoh Company, Limited. Developer for use in electrophotography, image forming method and process cartridge
CN1983058A (zh) * 2005-11-22 2007-06-20 三星电子株式会社 图像显影装置和使用该装置的成像装置
CN101893838A (zh) * 2010-05-05 2010-11-24 珠海天威飞马打印耗材有限公司 处理盒
CN101986214A (zh) * 2010-11-30 2011-03-16 珠海市奔码打印耗材有限公司 一种接触式显影硒鼓的新显影装置

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