KR900009115B1 - A sensitive drum protecting circuit of the copying machine - Google Patents

A sensitive drum protecting circuit of the copying machine Download PDF

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Publication number
KR900009115B1
KR900009115B1 KR1019870004849A KR870004849A KR900009115B1 KR 900009115 B1 KR900009115 B1 KR 900009115B1 KR 1019870004849 A KR1019870004849 A KR 1019870004849A KR 870004849 A KR870004849 A KR 870004849A KR 900009115 B1 KR900009115 B1 KR 900009115B1
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South Korea
Prior art keywords
photosensitive drum
main motor
control unit
antistatic lamp
microprocessor
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KR1019870004849A
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Korean (ko)
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KR880014422A (en
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윤석전
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삼성전자 주식회사
안시환
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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
    • 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

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  • General Physics & Mathematics (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

내용 없음.No content.

Description

복사기의 감광드럼 보호회로Photosensitive drum protection circuit of copier

제1도는 일반적인 복사기의 내부구성도.1 is an internal configuration diagram of a general copier.

제2도는 본 발명에 따른 복사기의 감광체 보호회로를 결합한 복사기의 내부구성도.2 is an internal configuration diagram of a copying machine incorporating a photosensitive protection circuit of the copying machine according to the present invention.

제3도는 본 발명의 동작설명을 위한 플로우챠트.Figure 3 is a flow chart for explaining the operation of the present invention.

제4도는 제2도에 도시한 마이크로 프로세서의 출력신호 파형도이다.4 is an output signal waveform diagram of the microprocessor shown in FIG.

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

1 : 원고대 2 : 노광램프1: document glass 2: exposure lamp

3 : 노광가이드 4 : 렌즈3: exposure guide 4: lens

5 : 감광 드럼 6 : 대전기5: photosensitive drum 6: charger

7 : 현상기 8 : 급지카세트7 Developing Machine 8 Paper Feed Cassette

9 : 복사용지 10 : 급지로울러9: copy paper 10: feed roller

11A, 11B : 이송로울러 12 : 전사기11A, 11B: Transfer Roller 12: Transfer Machine

13 : 슬리이브 14 : 클리너13: sleeve 14: cleaner

15A, 15B : 배지로울러 20 : 제전램프15A, 15B: Output roller 20: Antistatic lamp

21A, 21B : 잼(Jam)센서 22 : 마이크로 프로센서21A, 21B: Jam Sensor 22: Micro Pro Sensor

23A, 23B : 버퍼 24 : 제전램프제어부23A, 23B: buffer 24: antistatic lamp control unit

25 : 메인모터제어부 26 : 메인모터25: main motor control unit 26: main motor

본 발명은 복사기에 관한 것으로서, 특히 원고의 복사시 복사를 중지시키는 에러가 발생할 경우 제전램프를 작동시켜둔 상태에서 감광드럼을 구동시키는 메인모터를 강제적으로 회전시켜 감광체 표면에 형성되어 있는 전하를 제어하기 위한 복사기의 감광드럼 보호회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine. In particular, when an error occurs that stops copying during copying of an original, the charge formed on the surface of the photosensitive member is controlled by forcibly rotating the main motor driving the photosensitive drum while the antistatic lamp is operated. It relates to a photosensitive drum protection circuit of the copier for.

종래의 일반적인 복사기는 제1도에 도시한 바와 같이 구성되어 있는바, 복사시 원고대(1)위에 원고(도시하지 않았음)를 위치시킨다음, 사용자가 도시하지 않은 복사개시 키이를 누르게 되면 노광램프(2)에 의해 빛이 노광되어 노광가이드(3)를 거쳐 원고대(1)위에 위치한 원고의 명암에 따라 반사되는 빛이 렌즈(4)를 통해 감광드럼(5)에 주사된다.Conventional general copiers are constructed as shown in FIG. 1, which places an original (not shown) on the original glass 1 when copying, and then, when the user presses a copy start key (not shown), The light is exposed by the lamp 2 and the light reflected by the light and dark of the document positioned on the document glass 1 via the exposure guide 3 is scanned through the lens 4 to the photosensitive drum 5.

감광드럼(5)에 빛이 주사되기전에 대전기(6)에 의해 일정한 전위가 감광드럼(5)에 대전되고, 현상기(7)는 감광드럼(5)에 현상제와 토너의 혼합물을 공급하게 된다. 현상기(7)가 감광드럼(5)에 토너를 공급함과 동시에 급지카세트(8)에 있던 복사용지(9)는 급지로울러(10)의 회전에 의해 급지된뒤 이송로울러(11A, 11B)사이로 공급된다. 이때 이송로울러(11A, 11B)는 복사지(9)를 감광드럼(5)과 전사기(12)사이로 공급시키는바, 전사기(12)는 슬리이브(13)에 의해 드럼(5)에 부착된 토너를 복사용지(9)로 이동시킨다.Before light is injected into the photosensitive drum 5, a constant electric potential is charged by the charger 6 to the photosensitive drum 5, and the developer 7 causes the photosensitive drum 5 to supply a mixture of a developer and a toner. do. At the same time as the developing unit 7 supplies toner to the photosensitive drum 5, the copy paper 9 in the paper feeding cassette 8 is fed by the rotation of the feeding roller 10 and then supplied between the transfer rollers 11A and 11B. do. At this time, the transfer rollers 11A and 11B supply the copy paper 9 between the photosensitive drum 5 and the transfer machine 12, and the transfer machine 12 is attached to the drum 5 by the sleeve 13. The toner is moved to the copy paper 9.

이렇게 토너가 복사용지(9)에 부착되면 정착기(도시하지 않았음)는 토너에 열을 가하여 원고와 동일한 그림 또는 복사용지(9)에 용착시킨다. 한편 클리너(14)는 감광드럼(5)의 표면에 있는 잔류 토너를 제거하는 역할을 한다. 정착기에 의해 용착된 복사용지는 배지로울러(15A), (15B)를 통과하여 도시하지 않은 배지트레이에 쌓이게 된다.When the toner is attached to the copy paper 9 in this way, a fuser (not shown) heats the toner and deposits it on the same picture or copy paper 9 as the original. On the other hand, the cleaner 14 serves to remove residual toner on the surface of the photosensitive drum 5. Copy paper deposited by the fixing unit passes through the discharge rollers 15A and 15B and is accumulated in a discharge tray (not shown).

그러나, 종래의 복사지에 있어서, 복사중에 페이퍼잼(Paper Jam)이나 광학계 구동부의 고장 또는 전원 불량으로 인하여 복사동작이 중지될 경우 감광드럼(5)의 표면에는 잠상전하가 남아있는 영역 "A"이 형되는바, 이러한 영역이 제거되지 않은채로 장시간 방치되면 영역 "A"의 감광드럼 표면은 감도가 저하되어 복사물의 화질이 부분적으로 어두어질 뿐만아니라 농도가 불균일해지므로 감광드럼의 수명을 단축시키는 단점이 있었다.However, in the conventional copy paper, the area "A" in which latent image charge remains on the surface of the photosensitive drum 5 when the copying operation is stopped due to a failure of the paper jam, the optical drive or the power supply during copying. If this area is left without being removed for a long time, the surface of the photosensitive drum of the region "A" will be reduced in sensitivity, which will not only partially darken the image quality of the copy, but also make the density uneven, which will shorten the life of the photosensitive drum. There was this.

따라서, 본 발명은 이러한 문제점을 해결하기 위해 안출한 것으로서, 복사도중에 에러현상이 발생되었을 경우 감광드럼을 구동하는 메인모터와 제전램프를 작동시켜 감광드럼을 강제적으로 회전시킴으로써 감광드럼에 형성된 잠상전하를 용이하게 제거하여 감광드럼의 수명 및 복사감도를 향상시키기 위한 복사기의 감광드럼 보호회로를 제공하는데 그 목적이 있다.Accordingly, the present invention has been made to solve such a problem, and when an error occurs during radiation, by operating the main motor and the antistatic lamp for driving the photosensitive drum to forcibly rotate the photosensitive drum to reduce the latent image charge formed in the photosensitive drum It is an object of the present invention to provide a photosensitive drum protection circuit of a copier for easily removing and improving the life and radiation sensitivity of the photosensitive drum.

이러한 목적을 달성하기위한 본 발명을 제2도 내지 제4도에 의거하여 상세히 설명하면 다음과 같다.The present invention for achieving this purpose is described in detail with reference to FIGS. 2 to 4 as follows.

제2도는 본 발명에 따른 복사기의 감광드럼 보호회로도인바, 제2도중 제1도와 동일한 참조번호는 동일부품을 표시한다. 본 발명은 제2도에서와 같이, 대전기(6)에 의해 일정한 전위가 메인모터(도시하지 않음)에 의해 구동되는 감광드럼(5)표면에 대전되어 소정의 원고를 복사하고 제전램프(20)에 의해 감광드럼(5)표면에 잔류저하영역 "A"을 제거하는 복사기에 있어서, 대전전하가 복사중지 사태로 인해 감광드럼 표면에 남아있을 경우 이를 용이하게 제거하기 위한 것인바, 이를 위해 본 발명은 다음과 같은 수단을 구비하였다.2 is a circuit diagram of a photosensitive drum protection circuit of a copying machine according to the present invention, in which the same reference numerals as those in FIG. 1 denote the same parts. In the present invention, as shown in FIG. 2, a constant electric potential is charged by the charger 6 to the surface of the photosensitive drum 5 driven by the main motor (not shown), thereby copying a predetermined document and removing the antistatic lamp 20 In the copier for removing the residual degradation area "A" on the surface of the photosensitive drum (5) by), it is to easily remove the charge when the charge remaining on the surface of the photosensitive drum due to the radiation stop situation. The invention was equipped with the following means.

복사중 복사기의 동작중지상태는 잼센서(Jam Samsor) (21A, 21B)에 의해 검출되는바, 이 잼센서(21A, 21B)는 복사중 복사용지(9)가 복사기의 내부에 걸렸을 경우(Paper Jamming), 그와 접촉되어 마이크로 프로세서(22)의 단자(

Figure kpo00001
) 또는 (
Figure kpo00002
)에 감지신호를 제공하게 된다.The copying state of the copier during copying is detected by the Jam Samsor (21A, 21B). This jam sensor (21A, 21B) is detected when the copy paper (9) jams inside the copier (Paper). Jamming), and the terminals of the microprocessor 22
Figure kpo00001
) or (
Figure kpo00002
) To provide a detection signal.

이때 마이크로 프로세서(22)는 단자(

Figure kpo00003
) 또는 (
Figure kpo00004
)에 입력되는 감지신호를 입력받아 출력단자(
Figure kpo00005
)와 (
Figure kpo00006
)를 제어하게 된다. 그런데 마이크로 프로세서(22)는 복사도중에 복사기가 이상상태로 말미암아 멈추게될 경우 단자(
Figure kpo00007
)와 (
Figure kpo00008
)를 강제적으로 하이상태로 만든다. 다시 말하면, 제3도에 도시한 바와 같이, 복사기가 정상동작한 후 에러와 같은 이상상태가 발생하면, 마이크로 프로세서(22)는 출력단자(
Figure kpo00009
)와 (
Figure kpo00010
)를 제4도의 (C)와 (D)와 같이 하이상태로 만든다.At this time, the microprocessor 22 has a terminal (
Figure kpo00003
) or (
Figure kpo00004
Output terminal ()
Figure kpo00005
)Wow (
Figure kpo00006
Will be controlled. However, the microprocessor 22 is connected to the terminal when the copier stops due to an abnormal state during copying.
Figure kpo00007
)Wow (
Figure kpo00008
Force) to a high state. In other words, as shown in FIG. 3, when an abnormal state such as an error occurs after the copier normally operates, the microprocessor 22 outputs (
Figure kpo00009
)Wow (
Figure kpo00010
) Is made high as shown in (C) and (D) of FIG.

이렇게 발생된 마이크로 프로세서(22)의 출력은 버퍼(23A, 23B)를 통해 제전램프제어부(24)와 메인모터제어부(25)에 인가된다. 그러면, 제전램프제어부(24)와 메인모터제어부(25)는 버퍼(23A, 23B)로부터 입력된 신호에 의해 동시에 작동하여 제전램프(20)와 메틴모터(26)를 작동시키게 된다. 여기에서, 제전램프제어부(24)와 메인모터제어부(25)는 예컨대 트랜지스터 및 릴레이와 같은 소자로 구성된 회로일 수도 있다.The output of the microprocessor 22 generated in this way is applied to the antistatic lamp control unit 24 and the main motor control unit 25 through the buffer (23A, 23B). Then, the antistatic lamp control unit 24 and the main motor controller 25 operates simultaneously by the signals input from the buffers 23A and 23B to operate the antistatic lamp 20 and the methine motor 26. Here, the antistatic lamp control unit 24 and the main motor control unit 25 may be a circuit composed of elements such as a transistor and a relay, for example.

따라서, 복사도중에 감광드럼(5)의 회전이 페이퍼잼으로 인해 복사동작이 중지되면, 마이크로 프로세서(22)는 잼센서(21A, 또는 21B)로부터의 감지신호에 따라 소정의 시간동안 제전램프제어부(24) 및 메인모터제어부(25)를 제어하여 제전램프(20)를 온시키고, 감광드럼(5)을 강제적으로 회전시켜 감광드럼(5)표면에 남아있는 잔류전하를 제거할 수가 있다. 여기에서, 마이크로 프로세서(22)가 감광드럼(5)을 소정의 시간동안 강제적으로 회전시키는 것은 잼센서(21A, 21B)의 위치에 따라 사전에 프로그램하는 것이 바람직하다.Therefore, when the rotation of the photosensitive drum 5 is stopped due to the paper jam during the radiation, the microprocessor 22 controls the antistatic lamp control unit for a predetermined time in accordance with the detection signal from the jam sensor 21A or 21B. 24) and the main motor control unit 25 can be controlled to turn on the antistatic lamp 20 and forcibly rotate the photosensitive drum 5 to remove residual charge remaining on the surface of the photosensitive drum 5. Here, it is preferable that the microprocessor 22 forcibly rotate the photosensitive drum 5 for a predetermined time in advance according to the positions of the jam sensors 21A and 21B.

이와같이 동작하는 본 발명은 복사도중에 페이퍼잼이 발생되고 그에 따라 감광드럼의 회전이 정지되어 감광드럼 표면에 잔류전하가 형성될 경우 감광드럼을 강제적으로 구동시킴과 동시에 대전램프를 작동시켜 잔류전하를 완전히 제거함으로써 감광드럼의 수명연장 및 감광드럼의 복사감도를 증가시킬 수 있는 특징을 지닌 것이다The present invention operates as described above, when paper jam is generated during radiation, and the rotation of the photosensitive drum is stopped so that residual charge is formed on the surface of the photosensitive drum, the photosensitive drum is forcibly driven and the charging lamp is operated to simultaneously operate the charging lamp. By removing it, the life of the photosensitive drum can be extended and the sensitivity of the photosensitive drum can be increased.

Claims (1)

대전기에 의해 일정한 전위가 메인모터에 의해 구동되는 감광드럼 표면에 대전되어 소정의 원고를 복사하고, 제전램프에 의해 감광드럼 표면의 잔류전하를 제거하는 복사기의 감광드럼 보호회로에 있어서; 복사기의 복사정지상태를 감지하는 센서와; 상기의 복사정지시 제전램프를 작동시키는 제1신호와, 상기의 감광드럼을 회전하는 메인모터를 강제적으로 구동시키는 제2신호를 발생시키기 위한 마이크로 프로세서와; 상기의 복사정지시 상기의 마이크로 프로세서에서 발생되는 제1신호를 제1버퍼를 통해 입력받아 제전램프를 소정의 시간동안 작동시키기 위한 제전램프제어부 및; 상기의 복사정지중 제전램프제어부가 작동하는 시간동안 상기의 마이크로 프로세서에서 발생된 제2신호를 제2버퍼를 통해 입력받아 메인모터를 작동시켜 복사정지로 발생되는 감광드럼 표면의 잔류전하를 제거하기 위한 메인모터제어부로 구성시켜서 된것을 특징으로 하는 복사기의 감광드럼 보호회로.A photosensitive drum protection circuit of a photocopier, in which a constant potential is charged by a charger to a photosensitive drum surface driven by a main motor to copy a predetermined document, and a residual charge on the photosensitive drum surface is removed by an antistatic lamp; A sensor for detecting a copy stop state of the copier; A microprocessor for generating a first signal for operating the antistatic lamp and the second signal forcibly driving the main motor for rotating the photosensitive drum when the radiation is stopped; An antistatic lamp control unit which receives the first signal generated by the microprocessor through the first buffer and operates the antistatic lamp for a predetermined time during the copy stop; During the radiation stop, the second signal generated by the microprocessor is input through the second buffer during the operation of the antistatic lamp control unit to operate the main motor to remove residual charge on the surface of the photosensitive drum generated by the radiation stop. Photosensitive drum protection circuit of a copier, characterized in that consisting of a main motor control unit for.
KR1019870004849A 1987-05-18 1987-05-18 A sensitive drum protecting circuit of the copying machine KR900009115B1 (en)

Priority Applications (1)

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KR1019870004849A KR900009115B1 (en) 1987-05-18 1987-05-18 A sensitive drum protecting circuit of the copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019870004849A KR900009115B1 (en) 1987-05-18 1987-05-18 A sensitive drum protecting circuit of the copying machine

Publications (2)

Publication Number Publication Date
KR880014422A KR880014422A (en) 1988-12-23
KR900009115B1 true KR900009115B1 (en) 1990-12-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870004849A KR900009115B1 (en) 1987-05-18 1987-05-18 A sensitive drum protecting circuit of the copying machine

Country Status (1)

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KR (1) KR900009115B1 (en)

Also Published As

Publication number Publication date
KR880014422A (en) 1988-12-23

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