KR920001007Y1 - Apparatus for eliminating latent image in a copier - Google Patents
Apparatus for eliminating latent image in a copier Download PDFInfo
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- KR920001007Y1 KR920001007Y1 KR2019890012117U KR890012117U KR920001007Y1 KR 920001007 Y1 KR920001007 Y1 KR 920001007Y1 KR 2019890012117 U KR2019890012117 U KR 2019890012117U KR 890012117 U KR890012117 U KR 890012117U KR 920001007 Y1 KR920001007 Y1 KR 920001007Y1
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- latent image
- photosensitive drum
- lamp
- copier
- light
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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
- G03G21/06—Eliminating residual charges from a reusable imaging member
- G03G21/08—Eliminating residual charges from a reusable imaging member using optical radiation
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- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래 복사기의 개략 구조도.1 is a schematic structural diagram of a conventional copier.
제2도는 종래 잠상소거램프 구조 및 배광분포도.2 is a conventional latent image erasing lamp structure and light distribution distribution diagram.
제3도는 종래 잠상소거램프의 구동회로도.3 is a driving circuit diagram of a conventional latent image erasing lamp.
제4도는 본 고안의 복사기의 개략구성도.4 is a schematic configuration diagram of the copier of the present invention.
제5도는 본 고안의 잠상소거램프 구조 및 배광 분포도.5 is a latent image erasing lamp structure and light distribution of the present invention.
제6도는 본 고안의 잠상소거램프의 구동회로도.6 is a driving circuit diagram of a latent image erasing lamp of the present invention.
제7도는 본 고안의 잠상소거램프의 구동파형도.7 is a driving waveform diagram of the latent image erasing lamp of the present invention.
본 고안은 복사기와 같은 전자사진 프로세서에 있어서, 감과 드럼상에 맺힌 정전잠상을 소거하기 위한 장치에 관한 것이다.The present invention relates to an apparatus for erasing an electrostatic latent image formed on a persimmon and a drum in an electrophotographic processor such as a copying machine.
통상적으로 사용되는 전사장치는 전자사진 복사기 시스템도를 참조하여 일반적인 복사기능을 설면하면 하기와 같다. 대전기(25)의 코로나 방전에 의해 감광드럼(Ph otoconductor)(28)의 상을 골고루 대전하고 감광드럼(28)의 회전에 의해 대전된 부분은 도시하지 않은 노광램프(exposure lamp)의 광원에 의해 원고대(Platen glass )상의 원고(Original)로 부터 반사된 빛으로 노광한다. 이 노광에 의해 원고의 상(Imag e)과 같은 정전잠상(Electro-static latent image)이 감광드럼(28)위에 생성되며, 이때 이 생성된 잠상이 현상기(27)를 지나는 동안 토너(Toner)로 현상(develope)하여 가시상으로 변하게 되고 이어서 급지롤러(roller)(20)에 의해서 급지된 복사용지 위에 전사기(32)의 작용으로 감광드럼(28)상의 가시상을 복사용지(31)로 전사되게 한다.A commonly used transfer apparatus is described below with reference to an electrophotographic copier system diagram. Evenly charged images of the Ph otoconductor 28 by the corona discharge of the charger 25, and the portion charged by the rotation of the photosensitive drum 28 to the light source of an exposure lamp (not shown) By light reflected from the original on the platen glass. This exposure produces an electrostatic latent image, such as an image of the original, on the photosensitive drum 28, where the latent image is generated as a toner while passing through the developer 27. The visible image on the photosensitive drum 28 is transferred to the copy paper 31 by the action of the transfer machine 32 on the copy paper fed by the feed roller 20 after development and development into a visible image. To be.
이때 복사용지는 정전기력에 의해 감광드럼(28)에 밀착되어지며 분리기(33)는 이 밀착된 복사용지를 분리시켜 주는 역할을 수행한다. 그후 분리된 복사용지를 정착부의 히팅롤러(heating roller)(35) 압착로울러(pressure roller)(34) 사이로 통과시키면 열과 압력에 의해 복사지면에 원고의 상이 정착되어 원하는 복사가 이루어진다. 한편 전사기(32)를 지난 드럼상에 잔여분의 토너와 잠상이 존재하게 되는데, 여기서 토너는 청소기(clearuing blade)(29)에 의해 제거되며, 잠상은 잠상제거 램프(pre-erase lamp array)(37)에 의해 제거되도록 되어있다.At this time, the copy paper is in close contact with the photosensitive drum 28 by the electrostatic force and the separator 33 serves to separate the close contact with the copy paper. Then, when the separated copy paper passes between the heating roller 35 and the pressure roller 34 of the fixing unit, the image of the original is settled on the copying surface by heat and pressure to make a desired copy. On the other hand, residual toner and a latent image are present on the drum passing through the transfer machine 32, where the toner is removed by a clearing blade 29, and the latent image is stored in a pre-erase lamp array. 37) to be removed.
이러한 구조로 이루어진 전자 사진 프로세서의 잠상 제거장치는 제2, 3도에 도시된 바와같이 PCB에 네온램프(50)를 여러개 직렬로 연결한 구조로 되어있으며 감광드럼(28)이 회전함과 동시에 릴레이(Ry)에“온”신호가 입력되면 릴레이(Ry)가 구동되어 AC전원이 네온램프(50)에 가해져 발광이 된다.The latent image removal device of the electrophotographic processor having such a structure has a structure in which several neon lamps 50 are connected to the PCB in series as shown in FIGS. 2 and 3, and the photosensitive drum 28 rotates and relays at the same time. When the "on" signal is input to Ry, the relay Ry is driven so that the AC power is applied to the neon lamp 50 to emit light.
그러나 이러한 잠상 제거장치는 감광드럼(28)의 축방향으로 여러개의 네온램프 (50)를 직렬로 연결한 상태에서 발광하므로 네온램프와 네온램프 사이에는 광량이 떨어져서 불균일 하므로 드럼의 잠상이 분균일하게 소거되어 차기 복사시 화상이 약간씩 복사되어 나오는 문제점이 있으며 이러한 문제점을 해소하기 위하여 발광램프의 전면에 필터를 사용하기도 하나 이러한 경우에는 감광드럼에 도달하는 광량이 감소하므로 부하저항(R)을 적게하여 전력을 증대시킴으로서 광량을 증대하여 잠상제거 효율을 상승시킬 수 있으나 이때에는 광량을 올리므로서 온도가 상승하여 감광드럼이 열화하여 복사화질이 나빠지는 문제점이 있었다.However, since the latent image removal device emits light in a state in which several neon lamps 50 are connected in series in the axial direction of the photosensitive drum 28, the amount of light falls between the neon lamps and the neon lamps so that the latent image of the drum is unevenly distributed. There is a problem that the image is copied a little during the next copy, and the filter is used in front of the light emitting lamp to solve this problem, but in this case, the amount of light reaching the photosensitive drum is reduced, so that the load resistance (R) is reduced. By increasing the power to increase the amount of light to increase the latent image removal efficiency, but at this time there is a problem that the radiation quality is worsened by deteriorating the photosensitive drum by increasing the temperature as the light amount increases.
본 고안은 상기와 같은 문제점을 해소하기 위하여 안출된 것으로서 발광램프를 EL램프를 사용하므로서 높은 광량에도 발열되지 않도록 하여 잠상제거 능률을 향상시키며 감광드럼의 열화현상을 미연에 방지하여 기기의 신뢰성을 향상토록 함에 본 고안의 목적이 있다.The present invention was devised to solve the above problems, and the light emitting lamp does not generate heat even in high light amount by using EL lamp, thereby improving latent image removal efficiency and preventing deterioration of photosensitive drum, thereby improving the reliability of the device. For the purpose of this invention.
상기 목적을 달성하기 위한 실시예를 첨부된 도면에 의거 상세히 설명하면 다음과 같다.An embodiment for achieving the above object will be described in detail with reference to the accompanying drawings.
감광드럼(28)의 표면에 남아있는 정전 잠상을 제거하기 위한 소거램프를 EL램프(50)로 구성하여 직류전압을 소정 주파수를 가지는 전압으로 변환하여 상기 EL램프구동전원을 제공하는 DC-AC인버터(51)와 직류전압단과 상기 DC-AC인버터(51)의 전압 입력단자 사이에 접속되며 복사기 구동신호에 의해 스위칭되어 상기 DC-AC인버터의 직류전압 통로를 형성하는 트랜지스터(Q)로 구성됨을 특징으로 한다.A DC-AC inverter providing an EL lamp driving power by converting a DC voltage into a voltage having a predetermined frequency by forming an erasing lamp for eliminating the electrostatic latent image remaining on the surface of the photosensitive drum 28 by using the EL lamp 50. And a transistor (Q) connected between the DC voltage terminal and the voltage input terminal of the DC-AC inverter 51 and switched by a copier driving signal to form a DC voltage path of the DC-AC inverter. It is done.
이와같이 구성된 본 고안의 작용효과는 복사기를 구동시키면 감광드럼(28)이 회전함과 동시에 트랜지스터(Q)의 베이스단에 온(ON)신호가 로우(LOW)로 입력되면 트랜지스터(Q)가 “온”되어 DC-AC인버터(51)의 입력단자 Vcc전원이 인가되어 인버터(51)의 출력단자에는 제7도와 같이 AC정현파가 출력되어 EL램프(50)를 “온”되어 발광하므로 감광드럼(28)의 표면에 남아있는 정전잠상을 제거하게 된다. 이때 EL램프 발광을 하여도 열을 발산하지 않으므로 감광드럼(28)의 열화현상을 방지할 수 있다.The operating effect of the present invention configured as described above is that if the photosensitive drum 28 is rotated when the copier is driven and the ON signal is input to the base terminal of the transistor Q as LOW, the transistor Q is “on”. Then, the input terminal Vcc power of the DC-AC inverter 51 is applied, and the AC sine wave is outputted to the output terminal of the inverter 51 as shown in FIG. 7 so that the EL lamp 50 is turned on to emit light. This eliminates the electrostatic latent image remaining on the surface. At this time, heat is not emitted even when the EL lamp is emitted, so that deterioration of the photosensitive drum 28 can be prevented.
또한 잠상소거 효율을 올리기 위하여서는 DC-AC인버터(51)의 출력전압을 올리거나 주파수를 상승시키면 되는데 이때 주파수 변경은 인버터 내의 회로정수변경으로 가능하다.In addition, to increase the latent image erasing efficiency, the output voltage of the DC-AC inverter 51 may be increased or the frequency may be increased. In this case, the frequency may be changed by changing the circuit constant in the inverter.
상기한 바와 같이 본 고안에 의하면 감광드럼의 열화를 방지하여 안정된 화상을 얻을 수 있으므로 기기의 신뢰성을 향상시킬 수 있다.As described above, according to the present invention, since a stable image can be obtained by preventing deterioration of the photosensitive drum, the reliability of the device can be improved.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890012117U KR920001007Y1 (en) | 1989-08-17 | 1989-08-17 | Apparatus for eliminating latent image in a copier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890012117U KR920001007Y1 (en) | 1989-08-17 | 1989-08-17 | Apparatus for eliminating latent image in a copier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR910004781U KR910004781U (en) | 1991-03-19 |
| KR920001007Y1 true KR920001007Y1 (en) | 1992-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019890012117U KR920001007Y1 (en) | 1989-08-17 | 1989-08-17 | Apparatus for eliminating latent image in a copier |
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| Country | Link |
|---|---|
| KR (1) | KR920001007Y1 (en) |
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1989
- 1989-08-17 KR KR2019890012117U patent/KR920001007Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR910004781U (en) | 1991-03-19 |
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