KR100285742B1 - Retransfer roller of toner in development apparatus - Google Patents

Retransfer roller of toner in development apparatus Download PDF

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Publication number
KR100285742B1
KR100285742B1 KR1019970074170A KR19970074170A KR100285742B1 KR 100285742 B1 KR100285742 B1 KR 100285742B1 KR 1019970074170 A KR1019970074170 A KR 1019970074170A KR 19970074170 A KR19970074170 A KR 19970074170A KR 100285742 B1 KR100285742 B1 KR 100285742B1
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South Korea
Prior art keywords
toner
roller
developing
photosensitive drum
supply
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KR1019970074170A
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Korean (ko)
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KR19990054359A (en
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임영택
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윤종용
삼성전자주식회사
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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
    • G03G15/06—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
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0815—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer handling means after the developing zone and before the supply, e.g. developer recovering roller
    • 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
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0812—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer regulating means, e.g. structure of doctor blade
    • 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
    • G03G2215/06—Developing structures, details
    • G03G2215/0634—Developing device

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE: An inverse return roller for toner of a development unit is provided to maintain the fluidity of toner in a developing unit for preventing the deformation of the toner, thereby improving the image quality. CONSTITUTION: An inverse return roller for toner of a development unit includes a toner loading part(10) for loading toner, a supply roller(7) mounted at a lower part of the toner loading part for conveying stirred toner to a developing roller(6), an inversion return roller(20) mounted at the other side of the supply roller for rotating in contact with the supply roller, a rib(21) extended from an inner surface of the toner loading part and contacting a surface of the supply roller, and a scrapper(23) formed with a supply slit(22) between the rib and having a bottom surface contacting the inversion return roller and a lower end formed with a recovery slit(24) and coupled with a bottom surface of the toner loading part.

Description

현상기의 토너 역반송롤러{RETRANSFER ROLLER OF TONER IN DEVELOPMENT APPARATUS}Toner back conveying roller of developer [RETRANSFER ROLLER OF TONER IN DEVELOPMENT APPARATUS}

본 발명은 전자사진 프로세서에 관한 것으로서, 특히 현상기 내에서 토너가 변형되는 것을 막기 위한 현상기의 토너 역반송롤러에 관한 것이다.TECHNICAL FIELD The present invention relates to an electrophotographic processor, and more particularly, to a toner back conveying roller of a developer for preventing toner from being deformed in a developer.

도 1은 종래 기술의 실시예에 따른 현상기를 나타낸 개략도이다.1 is a schematic view showing a developing device according to an embodiment of the prior art.

도 1에 도시된 바와 같이 종래의 현상기(1)는, 토너(11)를 적재하는 토너적재부(10)와, 상기 토너적재부 내부에 장착되어 토너를 교반하는 교반기(8)와, 상기 토너적재부 하측에 설치되어 교반된 토너를 현상롤러로 이송시키는 공급롤러(7)와, 상기 공급롤러에서 이송된 토너를 감광드럼의 표면에 형성된 정전잠상에 현상시키는 현상롤러(6)와, 상기 현상롤러의 상단부에는 상기 현상롤러의 표면에 형성된 토너를 일정한 높이로 규제하는 블레이드(13)와, 상기 현상롤러의 일측에 설치되어 일정한 주속으로 회전하는 감광드럼(2)으로 구성된다.As shown in FIG. 1, the conventional developing device 1 includes a toner loading portion 10 for loading the toner 11, a stirrer 8 mounted inside the toner loading portion for stirring the toner, and the toner. A supply roller 7 installed below the stacking unit to transfer the stirred toner to the developing roller, a developing roller 6 for developing the electrostatic latent image formed on the surface of the photosensitive drum, and the developing toner transferred from the supply roller; The upper end of the roller is composed of a blade 13 for regulating the toner formed on the surface of the developing roller to a constant height, and a photosensitive drum 2 installed on one side of the developing roller to rotate at a constant circumferential speed.

또한, 상기 감광드럼(2)의 일측 상단부에 설치되어 전기적으로 대전된 감광드럼의 표면에 정전잠상을 형성시키는 노광부(4)가 설치되며, 상기 감광드럼의 타측 상단부에 설치되어 감광드럼의 표면에 전기적으로 전하층을 균일하게 대전시키는 대전롤러(3)와, 상기 대전롤러의 하측에는 상기 감광드럼의 잔류토너를 제거하기 위한 청소기(9)와, 상기 감광드럼의 하단부에는 감광드럼 표면의 토너화상을 용지(12) 상에 전사시키는 전사롤러(5)로 구성된다.In addition, an exposure unit 4 is installed at one end of the photosensitive drum 2 to form an electrostatic latent image on the surface of the electrically charged photosensitive drum. The exposure unit 4 is installed at the other top of the photosensitive drum. A charging roller 3 that electrically charges the charge layer uniformly, a cleaner 9 for removing residual toner of the photosensitive drum under the charging roller, and a toner on the surface of the photosensitive drum at the lower end of the photosensitive drum. It consists of the transfer roller 5 which transfers an image on the paper 12. As shown in FIG.

상기와 같이 구성된 전자사진 프로세서의 현상기가 작동하는 과정을 살펴보면 다음과 같다.Looking at the process of the developer of the electrophotographic processor configured as described above are as follows.

토너적재부(10)에 적재된 토너(11)가 교반기(8)에 의해 교반되어져 공급롤러(7) 쪽으로 이동되고, 상기 공급롤러의 회전에 의해 다시 현상롤러(6)로 공급되어 진다. 이때, 상기 현상롤러 표면에 형성된 토너는 블레이드(13)에 의해 일정한 높이로 규제되어 진다.The toner 11 loaded on the toner loading part 10 is agitated by the stirrer 8 to be moved toward the feed roller 7, and is supplied to the developing roller 6 again by the rotation of the feed roller. At this time, the toner formed on the surface of the developing roller is regulated to a certain height by the blade 13.

이어, 상기 대전롤러(3)의 대전 작용에 의해 감광드럼(2)의 표면이 전기적으로 균일하게 대전되고, 상기 감광드럼의 회전에 의해 대전된 부분이 노광부(4)를 통해 화상을 형성하기 위한 전기적 신호를 받아 상기 감광드럼(2) 표면을 노광시키면, 초기 대전된 상태에서 빛을 받은 부분은 정전잠상이 형성하게 되며, 이때 상기 감광드럼의 정전잠상이 회전되는 현상롤러(6)를 지나는 동안 토너로 현상되어 가시상으로 변하게 된다. 이어, 급지카셋트로부터 이송된 용지(12)가 급지롤러에 의해 급지되고, 이어 전사롤러(5)의 고압작용이 상기 감광드럼(2) 표면의 토너화상을 용지(12)로 전사되게 한다.Subsequently, the surface of the photosensitive drum 2 is electrically uniformly charged by the charging action of the charging roller 3, and the portion charged by the rotation of the photosensitive drum forms an image through the exposure unit 4. When the surface of the photosensitive drum 2 is exposed by receiving an electrical signal, an electrostatic latent image is formed in the portion that receives the light in the initial charged state, where the electrostatic latent image of the photosensitive drum passes through the developing roller 6. While it is developed with toner, it becomes a visible image. Then, the paper 12 conveyed from the paper feed cassette is fed by the paper feed roller, and the high pressure action of the transfer roller 5 causes the toner image on the surface of the photosensitive drum 2 to be transferred to the paper 12.

그러나, 토너적재부로부터 상기 공급롤러 상측(a 부분)으로 공급되는 토너는 분압에 의해 다져져 점차 그 유동성을 잃게 되고, 유동성을 잃은 토너는 공급롤러 및 현상롤러와의 마찰에 의해 변형을 일으키게 된다.However, the toner supplied from the toner loading portion to the upper side (a part) of the supply roller is compacted by partial pressure and gradually loses its fluidity. The toner that has lost the fluidity is deformed by friction with the supply roller and the developing roller.

이와 같이 유동성을 잃고 변형된 토너는 현상롤러 쪽으로 원활히 공급되지 않으므로, 감광드럼 표면의 정전잠상에 부착되는 토너의 양도 줄어들어 용지에 형성되는 화상의 농도가 저하되는 등 화상품질의 저하를 일으키는 문제점이 있었다.Since the toner deteriorated in fluidity and thus deformed is not supplied smoothly to the developing roller, the amount of toner adhered to the electrostatic latent image on the surface of the photosensitive drum is also reduced, resulting in deterioration of image quality, such as a decrease in the density of an image formed on the paper. .

상기와 같은 문제점을 해결하기 위하여 본 발명의 목적은 현상기 내에서 토너가 유동성을 잃고 변형되지 않도록 하기 위한 현상기의 토너 역반송롤러를 제공하는데 있다.SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a toner back conveying roller of a developer for preventing toner from losing its fluidity and being deformed in the developer.

상기와 같은 목적을 달성하기 위하여 본 발명은 감광드럼과 현상롤러를 구비한 전자사진 프로세서의 현상기에 있어서, 상기 현상기는, 토너를 적재하는 토너적재부와; 상기 토너적재부 하측에 설치되어 교반된 토너를 현상롤러로 이송시키는 공급롤러와; 상기 공급롤러의 타측에는 공급롤러 표면과 접하며 회전하는 역반송롤러와; 상기 토너적재부 내측면에서 연장 형성하고 단부가 상기 공급롤러 표면과 접하는 리브와; 상기 리브와의 사이에 공급슬릿을 형성하고, 밑면이 상기 역반송롤러와 접하며, 하단이 회수슬릿을 형성하고 토너적재부의 하측면과 결합하는 스크래퍼를 포함함을 특징으로 하는 현상기의 토너 역반송롤러를 제공한다.In order to achieve the above object, the present invention is a developing device of an electrophotographic processor having a photosensitive drum and a developing roller, the developing device includes a toner loading portion for loading toner; A supply roller which is installed under the toner loading unit and transfers the stirred toner to a developing roller; On the other side of the feed roller and the back conveying roller rotates in contact with the surface of the feed roller; A rib extending from the inner surface of the toner loading portion and having an end contacting the feed roller surface; A feeder slit formed between the ribs, a bottom surface contacting the back conveying roller, and a bottom end forming a recovery slit and including a scraper for engaging with the bottom surface of the toner loading part. To provide.

도 1은 종래 기술의 실시예에 따른 현상기를 나타낸 개략도,1 is a schematic view showing a developing device according to an embodiment of the prior art,

도 2는 본 발명의 바람직한 실시예에 따른 역반송롤러가 설치된 현상기의 개략도.2 is a schematic view of a developing machine equipped with a back conveying roller according to a preferred embodiment of the present invention.

〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

20 : 역반송롤러 21 : 리브20: back conveying roller 21: rib

22 : 공급슬릿 23 : 스크래퍼22: supply slit 23: scraper

24 : 회수슬릿24: recovery slit

이하 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다. 본 발명을 설명함에 있어서, 관련된 공지기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명을 생략한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

본 발명은 전자사진 프로세서에 관한 것으로서, 특히 현상기 내에서 토너가 변형되는 것을 막기 위한 현상기의 토너 역반송롤러에 관한 것이다.TECHNICAL FIELD The present invention relates to an electrophotographic processor, and more particularly, to a toner back conveying roller of a developer for preventing toner from being deformed in a developer.

도 2는 본 발명의 바람직한 실시예에 따른 역반송롤러가 설치된 현상기의 개략도이다.2 is a schematic view of a developing machine equipped with a back conveying roller according to a preferred embodiment of the present invention.

도 2에 도시된 바와 같이 본 발명의 현상기(1)는, 토너(11)를 적재하는 토너적재부(10)와, 상기 토너적재부 내부에 장착되어 토너를 교반하는 교반기(8)와, 상기 토너적재부 하측에 설치되어 교반된 토너를 현상롤러로 이송시키는 공급롤러(7)와, 상기 공급롤러의 타측에는 공급롤러 표면과 접하며 회전하는 역반송롤러(20)와, 상기 토너적재부 내측면에서 연장 형성하고 단부가 상기 공급롤러 표면과 접하는 리브(21)와, 상기 리브와의 사이에 공급슬릿(22)을 형성하고 밑면이 상기 역반송롤러와 접하는 스크래퍼(23)와, 상기 스크래퍼의 하단은 회수슬릿(24)을 형성하여 토너적재부의 하측면과 연장된다.As shown in FIG. 2, the developing device 1 of the present invention includes a toner loading portion 10 for loading the toner 11, a stirrer 8 mounted inside the toner loading portion for stirring the toner, and A supply roller 7 installed at the lower side of the toner loading part to transfer the stirred toner to a developing roller, a reverse conveyance roller 20 rotating and in contact with the surface of the supply roller at the other side of the supply roller, and an inner surface of the toner loading part; A rib 21 extending from the end and contacting the surface of the feed roller, a feed slit 22 formed between the rib, and a bottom surface of the scraper 23 contacting the back conveying roller, and a lower end of the scraper. The silver forms a recovery slit 24 and extends with the lower surface of the toner loading portion.

또한, 상기 공급롤러에서 이송된 토너를 감광드럼의 표면에 형성된 정전잠상에 현상시키는 현상롤러(6)와, 상기 현상롤러의 일측에 설치되어 일정한 주속으로 회전하는 감광드럼(2)과, 상기 감광드럼(2)의 일측 상단부에 설치되어 전기적으로 대전된 감광드럼의 표면에 정전잠상을 형성시키는 노광부(4)가 설치되며, 상기 감광드럼의 타측 상단부에 설치되어 감광드럼의 표면에 전기적으로 전하층을 균일하게 대전시키는 대전롤러(3)와, 상기 대전롤러의 하측에는 상기 감광드럼의 잔류토너를 제거하기 위한 청소기(9)와, 상기 감광드럼의 하단부에는 감광드럼 표면의 토너화상을 용지(12) 상에 전사시키는 전사롤러(5)로 구성된다.In addition, a developing roller 6 for developing the toner transferred from the feed roller to an electrostatic latent image formed on the surface of the photosensitive drum, a photosensitive drum 2 installed at one side of the developing roller and rotating at a constant circumferential speed, and the photosensitive An exposure unit 4 is installed at one upper end of the drum 2 to form an electrostatic latent image on the surface of the electrically charged photosensitive drum, and is installed at the other upper end of the photosensitive drum to electrically charge the surface of the photosensitive drum. A charging roller 3 for uniformly charging the layer, a cleaner 9 for removing residual toner of the photosensitive drum at the lower side of the charging roller, and a toner image on the surface of the photosensitive drum at the lower end of the photosensitive drum. It consists of the transfer roller 5 which transfers on 12).

상기와 같이 구성된 본 발명의 현상기가 작동하는 과정을 살펴보면 다음과 같다.Looking at the operation of the developing device of the present invention configured as described above are as follows.

토너적재부(10)에 적재되어 있던 토너(11)는 교반기(8)에 의해 교반되어져 공급슬릿(22)을 통해 역반송롤러(20) 상측으로 공급된다. 이어, 상기 역반송롤러의 회전에 의해 역반송롤러 상측의 토너는 공급롤러(7)로 이송되고, 상기 공급롤러 표면의 토너는 리브(21)의 단부에 의해 높이가 규제되면서 현상롤러(6) 쪽으로 공급된다.The toner 11 loaded on the toner loading part 10 is stirred by the stirrer 8 and supplied to the upper conveying roller 20 through the supply slit 22. Subsequently, the toner on the upper side of the back conveying roller is transferred to the supply roller 7 by the rotation of the back conveying roller, and the toner on the surface of the feed roller is regulated by the end of the rib 21, and the developing roller 6 Is supplied to the side.

한편, 미처 공급롤러로 이송되지 않고 역반송롤러(20) 표면에 남아 있던 토너들은 역반송롤러의 회전과 함께 스크래퍼(23)에 의해 긁어지고, 회수슬릿(24)을 통해 다시 토너적재부(10)로 이송되어 새로이 교반된다. 이때, 상기 리브(21)는 공급롤러(7) 상측에 밀착되어 설치되므로, b 부분에 토너가 정체되지 않도록 방지하는 역할을 한다.On the other hand, the toner remaining on the surface of the back conveying roller 20 without being conveyed to the feed roller is scraped off by the scraper 23 with the rotation of the back conveying roller, and again the toner loading part 10 through the recovery slit 24. It is transferred to) and stirred freshly. At this time, since the rib 21 is installed in close contact with the upper side of the feed roller 7, the rib 21 serves to prevent the toner from stagnating.

상술한 바와 같이 본 발명의 실시예에 따른 현상기의 토너 역반송롤러는 현상기 내에서 토너가 정체됨이 없이 유동성을 유지하게 함으로써 화상의 품질을 향상시키는 효과가 있다.As described above, the toner back conveying roller of the developing apparatus according to the embodiment of the present invention has the effect of improving the image quality by maintaining the fluidity without remaining toner in the developing apparatus.

Claims (1)

감광드럼과 현상롤러를 구비한 전자사진 프로세서의 현상기에 있어서,In the developing device of an electrophotographic processor having a photosensitive drum and a developing roller, 상기 현상기는, 토너를 적재하는 토너적재부와;The developing device includes a toner loading portion for loading toner; 상기 토너적재부 하측에 설치되어 교반된 토너를 현상롤러로 이송시키는 공급롤러와;A supply roller which is installed under the toner loading unit and transfers the stirred toner to a developing roller; 상기 공급롤러의 타측에는 공급롤러 표면과 접하며 회전하는 역반송롤러와;On the other side of the feed roller and the back conveying roller rotates in contact with the surface of the feed roller; 상기 토너적재부 내측면에서 연장 형성하고 단부가 상기 공급롤러 표면과 접하는 리브와;A rib extending from the inner surface of the toner loading portion and having an end contacting the feed roller surface; 상기 리브와의 사이에 공급슬릿을 형성하고, 밑면이 상기 역반송롤러와 접하며, 하단이 회수슬릿을 형성하고 토너적재부의 하측면과 결합하는 스크래퍼를 포함함을 특징으로 하는 현상기의 토너 역반송롤러.A feeder slit formed between the ribs, a bottom surface contacting the back conveying roller, and a bottom end forming a recovery slit and including a scraper for engaging with the bottom surface of the toner loading part. .
KR1019970074170A 1997-12-26 1997-12-26 Retransfer roller of toner in development apparatus KR100285742B1 (en)

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