KR930006968B1 - Image forming apparatus - Google Patents

Image forming apparatus Download PDF

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Publication number
KR930006968B1
KR930006968B1 KR1019900021486A KR900021486A KR930006968B1 KR 930006968 B1 KR930006968 B1 KR 930006968B1 KR 1019900021486 A KR1019900021486 A KR 1019900021486A KR 900021486 A KR900021486 A KR 900021486A KR 930006968 B1 KR930006968 B1 KR 930006968B1
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KR
South Korea
Prior art keywords
bracket
led head
photosensitive drum
head array
drum
Prior art date
Application number
KR1019900021486A
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Korean (ko)
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KR920013049A (en
Inventor
이동호
Original Assignee
삼성전자 주식회사
정용문
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Application filed by 삼성전자 주식회사, 정용문 filed Critical 삼성전자 주식회사
Priority to KR1019900021486A priority Critical patent/KR930006968B1/en
Priority to FR9113865A priority patent/FR2670712A1/en
Priority to ITMI913174A priority patent/IT1252695B/en
Priority to GB9125342A priority patent/GB2251083A/en
Priority to DE4140884A priority patent/DE4140884A1/en
Publication of KR920013049A publication Critical patent/KR920013049A/en
Application granted granted Critical
Publication of KR930006968B1 publication Critical patent/KR930006968B1/en

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Classifications

    • 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
    • G03G21/1647—Mechanical connection means
    • 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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
    • B41J2/45—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using light-emitting diode [LED] or laser arrays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/02—Framework
    • 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
    • G03G21/1604—Arrangement or disposition of the entire apparatus
    • G03G21/1623—Means to access the interior of the apparatus
    • G03G21/1628—Clamshell type
    • 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
    • G03G21/1666—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 exposure unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1636—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the exposure unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1654—Locks and means for positioning or alignment
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1678—Frame structures
    • G03G2221/1687—Frame structures using opening shell type machines, e.g. pivoting assemblies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

The image printer for maintaining precise distance between LED head and drum, has an LED array. The LED array illuminates a surface of a light-sensitive drum. A mounting is provided on which the array is mounted. A low friction roller is adjustably disposed between the mounting and the drum to determine the position of the LED array relative to the drum surface. A resilient bias member e.g. a coil spring or plate spring urges the LED array toward the drum surface. The roller is mounted on a free end of a bracket, with the array also mounted on a free end. A housing has two parts, at least one of which is movalbe w.r.t. the other to open the printer.

Description

화상 기록장치Image recorder

제1도는 종래 화상 기록 장치의 개략도.1 is a schematic diagram of a conventional image recording apparatus.

제2도는 본 발명의 화상 기록 장치의 개략도.2 is a schematic diagram of an image recording apparatus of the present invention.

제3도는 본 발명의 요부 사시도.3 is a perspective view of main parts of the present invention.

제4도는 본 발명의 요부 작용도.4 is a main action of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 하우징 2, 6 : 브라켓1 housing 2, 6 bracket

3 : 판스프링 4 : 어레이3: leaf spring 4: array

5 : 부재 7 : 로울러5: member 7: roller

본 발명은 전자사진을 이용하는 화상형성 장치에 관한 것으로서, 특히 LED 헤드 에레이를 이용한 화상기록 장치의 화질을 향상시킬 수 있도록 한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus using electrophotographic, and in particular, to improve the image quality of an image recording apparatus using an LED head array.

종래에 사용되어온 화상 기록 장치는 제1도에 도시한 바와같이 도시하지 않은 컴퓨터로 부터 인쇄 데이타가 입력되면 기록장치내부에 있는 콘트롤 회로가 스캐닝 유니트(10)를 동작시켜 감광드럼(11)에 광을 주사하게 된다.In a conventionally used image recording apparatus, as shown in FIG. 1, when print data is input from a computer (not shown), a control circuit inside the recording apparatus operates the scanning unit 10 to provide light to the photosensitive drum 11. Will be injected.

감광드럼(11)은 대전기(12)에 의해 일정 전압으로 대전된 상태에서 스캐닝 유니트(10)로 부터 광이 조사됨에 따라 광을 받은 부분의 전압이 떨어져 전기적 잠상이 생기게 된다.As the photosensitive drum 11 is irradiated with light from the scanning unit 10 in a state of being charged by the charger 12 at a predetermined voltage, the voltage of the light-receiving portion is dropped, thereby causing an electrical latent image.

이후 감광드럼(11)이 회전함에 따라 감광드럼의 정전잠상위에 현상기(13)의 토너가 옮겨 붙어 가시상으로 변하게 된다.Thereafter, as the photosensitive drum 11 rotates, the toner of the developing unit 13 is transferred onto the electrostatic latent image of the photosensitive drum to change into a visible image.

한편 급지부(14)로 부터 공급되어지는 용지는 레지스터 로울러로부터 정렬된 후 이송되어져 전사부(15)측으로 이송되어지며 이때 감광드럼상에 토너가 용지로 옮겨 붙어 전사가 행하여진다.On the other hand, the sheet supplied from the sheet feeding unit 14 is aligned with the register roller and then conveyed to the transfer unit 15 side. At this time, the toner is transferred to the sheet on the photosensitive drum and the transfer is performed.

이후 감광드럼의 정전기력에 의해 감광드럼에 붙은 용지는 분리기(16)에 의해 분리되어져 정착기(17)측으로 이송되어져 히팅로울러(21)의 열과 압착로울러(22)의 압력에 의하여 토너가 용지에 정착되어져 배지트레이 측으로 이송되어진다.Thereafter, the paper attached to the photosensitive drum by the electrostatic force of the photosensitive drum is separated by the separator 16 and transferred to the fixing unit 17 so that the toner is fixed to the paper by the heat of the heating roller 21 and the pressure of the pressing roller 22. It is transferred to the discharge tray side.

이때 감광드럼상에 남아있는 잔여 토너는 크리닝부(23)에 의해 닦여져서 오우거를 통해 폐토너 회수통으로 보내어지며 정전 잠상은 잠상제거 램프(24)에서 조사되는 빛에 노광되어 잠상이 제거된다.At this time, the remaining toner remaining on the photosensitive drum is wiped by the cleaning unit 23 and sent to the waste toner collecting container through the ogre, and the electrostatic latent image is exposed to light irradiated from the latent image removing lamp 24 to remove the latent image.

상기와 같은 동작을 하는 전자사진 프로세서에서 감광드럼에서 정전잠상을 형성하는 수단으로써 레이져 스캐닝 유니트 사용시 부피가 커지고, 기기를 여닫을 때 발생하는 충격으로 렌즈 또는 거울의 위치가 유동하여 정확한 화상을 재현하지 못하는 문제점이 있었다.As a means of forming an electrostatic latent image in a photosensitive drum in the electrophotographic processor operating as described above, the volume of the laser scanning unit is increased, and the position of the lens or the mirror is moved due to the shock generated when the device is opened and closed, thereby failing to reproduce an accurate image. There was a problem.

따라서 근래에는 LED 램프를 순차적으로 배열하여 감광드럼을 노광시키는 LED 헤드 어레이를 사용하는 방식이 많이 채용되고 있다.Therefore, in recent years, a method of using an LED head array that exposes a photosensitive drum by sequentially arranging LED lamps has been adopted.

이러한 장치에서 종래에 사용되어 온 LED 헤드를 본체 하우징 또는 하우징에 결합되는 브라켓에 직접 부착되어 있어 LED 헤드와 잠상 드럼과의 거리를 정확하게 유지하기 어려웠었다.The LED heads conventionally used in such devices were attached directly to the body housing or to a bracket coupled to the housing, making it difficult to accurately maintain the distance between the LED head and the latent image drum.

본 발명은 상기 문제점을 해소하기 위하여 안출한 것으로 본체 하우징에 탄성을 갖는 탄력부재를 설치한 후 상기 탄력부재에 LED 헤드 어레이를 조립한 후 일측에 설치한 간격 유지 부재에 의해 일정한 거리를 유지시킬 수 있도록 함을 특징으로 한다.The present invention has been made to solve the above problems to install a resilient member having an elastic to the main body housing and then to maintain a constant distance by the interval holding member installed on one side after assembling the LED head array to the resilient member. It is characterized by.

이하 첨부된 도면을 참조하여 본 발명의 구성 및 작용효과를 상세히 설명하면 다음과 같다.Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

우선 제3도를 참조하여 본 발명의 구성을 설명하면, 본체 하우징(1)에 브라켓(2)을 고정 설치하고, 상기 브라켓(2)의 일단에는 탄성부재인 판스프링(3)을 고정하며 상기 탄성부재의 하면에는 LED 헤드 어레이(4)를 설치함과 동시에 상기 LED 헤드 어레이 양단에 위치 결정부재(5)를 설치한 것으로서 상기 위치결정부재는 ㄱ자로 절곡된 브라켓(6)에 하단에 로울러(7)를 설치하여 감광드럼(9)과 서로 접촉하며 일정 거리를 유지할 수 있도록 하였다.First, the configuration of the present invention will be described with reference to FIG. 3. The bracket 2 is fixedly installed on the main body housing 1, and the leaf spring 3, which is an elastic member, is fixed to one end of the bracket 2. At the bottom of the elastic member, the LED head array 4 is installed, and at the same time, the positioning member 5 is installed at both ends of the LED head array, and the positioning member has a roller at the lower end of the bracket 6 bent by a letter. 7) was installed to be in contact with the photosensitive drum (9) to maintain a certain distance.

이때 로울러 대신에 마찰 계수가 적은 물질을 사용하여 감광드럼이 회전할때 저항을 주지 않도록 구성하여도 동일한 작용을 할 수 있다.In this case, the same action may be performed by using a material having a small friction coefficient instead of a roller so as not to give resistance when the photosensitive drum is rotated.

이와 같이 구성된 본 발명의 작용효과는 전자사진 프로세서의 상부 본체 하부에 고정수단에 의해 고정되어 있는 브라켓(2)에 볼트(8)등의 고정수단에 의해 고정되어 있는 판스프링(3)의 하면에 LED 헤드 어레이(4)가 고정되어 있으므로 상부 본체가 열린 상태에서 LED 헤드 어레이(4)를 탄력적으로 유동 가능하게 설치되어 있는 상태이다. 하지만 상부 본체를 닫았을 때에는 LED 헤드 어레이(4) 양측에 설치된 브라켓(6)의 끝단에 설치된 로울러(5)가 감광드럼(9)의 표면에 맞닿는 상태이므로 감광드럼(9)과 LED 헤드 어레이(4)의 거리는 일정한 간격을 유지하게 한다.The effect of the present invention configured as described above is applied to the lower surface of the leaf spring 3 which is fixed by the fixing means such as bolt 8 to the bracket 2 which is fixed by the fixing means on the lower part of the upper body of the electrophotographic processor. Since the LED head array 4 is fixed, the LED head array 4 is elastically movable in the state where the upper main body is open. However, when the upper body is closed, the roller 5 installed at the end of the bracket 6 installed on both sides of the LED head array 4 is in contact with the surface of the photosensitive drum 9, so that the photosensitive drum 9 and the LED head array ( The distance of 4) is to maintain a constant interval.

이후 감광드럼(9)이 회전하더라도 로울러(7)가 회동하므로 항상 일정한 간격을 유지하게 된다.Since the roller 7 is rotated even after the photosensitive drum 9 rotates, it maintains a constant interval at all times.

상기 실시예에서는 탄성 부재로써 판스프링을 사용하였지만 브라켓을 좀더 길게 형성한 후 LED 헤드 어레이를 소정 간격 만큼 이격시킨 후 중간에 코일 스프링을 삽입하여 탄성부재로 이동하여도 동일한 효과를 발생할 수 있음은 주지의 사실이므로 더 이상의 설명은 생략한다.In the above embodiment, the leaf spring is used as the elastic member, but the bracket may be formed longer, and the LED head array may be spaced by a predetermined interval, and then the same effect may be generated even when the coil spring is inserted into the middle to move to the elastic member. Since this is true, further explanation is omitted.

또한 LED 헤드 어레이 양측벽에 설치되는 간격유지 부재는 감광드럼의 회전시 마찰력을 줄이기 위하여 로울러를 사용하였으나 마찰 계수가 매우 작은 물질을 이용하여 동일한 간격을 유지하여도 동일한 효과를 얻을 수 있다.In addition, the gap maintaining member installed on both side walls of the LED head array uses a roller to reduce the friction force during the rotation of the photosensitive drum, but the same effect can be obtained even if the same spacing is maintained by using a material having a very small coefficient of friction.

상기한 바와같이 본 발명에 의하면 LED 헤드 어레이와 감광드럼의 간격을 항상 일정하게 유지토록 하여 화질의 저하를 미연에 방지하여 항상 양질의 화상을 얻을 수 있는 것이다.As described above, according to the present invention, the interval between the LED head array and the photosensitive drum is kept constant at all times to prevent deterioration of image quality and to obtain a good image at all times.

Claims (5)

LED 헤드 어레이를 사용하는 전자사진 프로세서에 있어서, 상부 본체 하우징(1) 하단에 브라켓(2)을 고정하고 상기 브라켓(2)의 선단에는 LED 헤드 어레이(4)가 감광드럼(9)에 빛을 조사하는 방향으로 설치하되 탄성 부재를 사용하여 LED 헤드 어레이가 탄력적으로 작동가능하게 설치되며 상기 LED 헤드 어레이(4)의 양측면에는 위치결정 부재(5)가 설치됨을 특징으로 하는 화상 기록장치.In an electrophotographic processor using an LED head array, a bracket (2) is fixed to the bottom of the upper body housing (1), and at the tip of the bracket (2), the LED head array (4) emits light to the photosensitive drum (9). And an LED member, wherein the LED head array is elastically operable using an elastic member, and positioning members (5) are provided on both sides of the LED head array (4). 제1항에 있어서, 탄성 부재(5)는 판스프링(3)으로 이루어짐을 특징으로 하는 화상 기록장치.An image recording apparatus according to claim 1, wherein the elastic member (5) consists of a leaf spring (3). 제1항에 있어서, 탄성 부재(5)는 코일 스프링으로 이루어짐을 특징으로 하는 화상 기록장치.An image recording apparatus according to claim 1, wherein the elastic member (5) is made of a coil spring. 제1항에 있어서, 위치결정 부재(5)는 브라켓(6)과 상기 브라켓(6)의 선단에 회동 가능하게 설치된 로울러(7)로 이루어진 것을 특징으로 하는 화상 기록장치.2. An image recording apparatus according to claim 1, wherein the positioning member (5) comprises a bracket (6) and a roller (7) rotatably provided at the tip of the bracket (6). 제1항에 있어서, 위치결정 부재(5)는 선단이 감광드럼(9)에 맞닿도록 브라켓으로 하되 마찰 계수가 매우작은 물질로 이루어짐을 특징으로 하는 화상 기록장치.2. An image recording apparatus according to claim 1, wherein the positioning member (5) is made of a material such that the tip of the positioning member is bracketed so as to contact the photosensitive drum (9) with a very small coefficient of friction.
KR1019900021486A 1990-12-22 1990-12-22 Image forming apparatus KR930006968B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1019900021486A KR930006968B1 (en) 1990-12-22 1990-12-22 Image forming apparatus
FR9113865A FR2670712A1 (en) 1990-12-22 1991-11-12 IMAGE PRINTER.
ITMI913174A IT1252695B (en) 1990-12-22 1991-11-28 IMAGE PRINTER EQUIPMENT, IN PARTICULAR OF THE ELECTROPHOTOGRAPHIC TYPE
GB9125342A GB2251083A (en) 1990-12-22 1991-11-28 "An image printer"
DE4140884A DE4140884A1 (en) 1990-12-22 1991-12-11 IMAGE COPIER

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KR1019900021486A KR930006968B1 (en) 1990-12-22 1990-12-22 Image forming apparatus

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KR920013049A KR920013049A (en) 1992-07-28
KR930006968B1 true KR930006968B1 (en) 1993-07-24

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US7819956B2 (en) 2004-07-02 2010-10-26 Siemens Water Technologies Corp. Gas transfer membrane
JP6608322B2 (en) * 2016-03-31 2019-11-20 株式会社沖データ Optical print head and image forming apparatus

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US4703334A (en) * 1983-08-26 1987-10-27 Ricoh Company, Ltd. Optical recording head and belt positioning apparatus
JPS6210673A (en) * 1985-07-09 1987-01-19 Alps Electric Co Ltd Led print head
JPS62131267A (en) * 1985-12-03 1987-06-13 Alps Electric Co Ltd Image forming device
JPS62286769A (en) * 1986-06-04 1987-12-12 Nec Corp Led head positioning mechanism
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JP2568740B2 (en) * 1990-08-13 1997-01-08 三菱電機株式会社 Electrophotographic equipment

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IT1252695B (en) 1995-06-26
FR2670712A1 (en) 1992-06-26
ITMI913174A0 (en) 1991-11-28
GB2251083A (en) 1992-06-24
DE4140884A1 (en) 1992-07-02
GB9125342D0 (en) 1992-01-29
ITMI913174A1 (en) 1993-05-28
KR920013049A (en) 1992-07-28

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