KR0133527Y1 - Earthing structure of exposure drum - Google Patents

Earthing structure of exposure drum Download PDF

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Publication number
KR0133527Y1
KR0133527Y1 KR2019960029661U KR19960029661U KR0133527Y1 KR 0133527 Y1 KR0133527 Y1 KR 0133527Y1 KR 2019960029661 U KR2019960029661 U KR 2019960029661U KR 19960029661 U KR19960029661 U KR 19960029661U KR 0133527 Y1 KR0133527 Y1 KR 0133527Y1
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South Korea
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photosensitive drum
grounding
rotating shaft
grounding structure
present
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KR2019960029661U
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Korean (ko)
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KR19980016350U (en
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상 엽 신
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삼성전자 주식회사
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Publication of KR19980016350U publication Critical patent/KR19980016350U/en
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Publication of KR0133527Y1 publication Critical patent/KR0133527Y1/en

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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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Electrophotography Configuration And Component (AREA)

Abstract

본 고안은 감광드럼의 접지 구조에 관한 것으로 감광드럼과 회전축 사이의 지지부재를 도전성 재료로 형성하여 지지부재 자체가 접지선 역할을 하도록 함으로써 감광드럼의 접지 구조를 단순화하고 감광드럼의 접지불량을 방지하는데 그 목적이 있다.The present invention relates to a grounding structure of a photosensitive drum. The supporting member between the photosensitive drum and the rotating shaft is formed of a conductive material so that the supporting member itself serves as a grounding wire, thereby simplifying the grounding structure of the photosensitive drum and preventing grounding of the photosensitive drum. The purpose is.

이를 위한 본 고안은 감광드럼에 압입되어 회전축을 고정하는 지지부재를 도전성 재료로 사출하는 것을 특징으로 한다.The present invention for this purpose is characterized in that the injection member is pressed into the photosensitive drum to fix the rotating shaft to the conductive material.

이상에서와 같이 본 고안에 의한 감광드럼의 접지 구조에 의하면 감광드럼과 회전축 간의 접지를 위해 별도의 접지부재를 사용하지 않고 감광드럼의 양측에 설치되어 회전축을 지지하는 지지부재 자체를 도전성 재료로 사출하여 설치함으로써 감광드럼의 접지 구조를 단순화할 수 있으므로 원가 절감의 효과가 있으며, 접지의 신뢰도를 높일 수 있는 잇점이 있다.As described above, according to the grounding structure of the photosensitive drum according to the present invention, the support member itself installed on both sides of the photosensitive drum to support the rotating shaft without using a separate grounding member for grounding between the photosensitive drum and the rotating shaft is injected into the conductive material. In this way, the grounding structure of the photosensitive drum can be simplified, thereby reducing the cost and increasing the reliability of the grounding.

Description

감광드럼의 접지 구조Ground structure of photosensitive drum

본 고안은 감광드럼의 접지 구조에 관한 것으로서, 더욱 상세하게는 감광드럼의 양측에 설치되어 회전축(shaft)을 고정시키는데 사용되는 지지부재의 재료를 플라스틱 부재 대신에 도전성 부재를 사용함으로써 감광드럼과 회전축 사이에 접지선 역할을 겸하도록 하는 감광드럼의 접지구조에 관한 것이다.The present invention relates to a grounding structure of a photosensitive drum, and more particularly, a photosensitive drum and a rotating shaft by using a conductive member instead of a plastic member as a material of a support member installed on both sides of the photosensitive drum to fix a shaft. The present invention relates to a grounding structure of a photosensitive drum that serves as a grounding wire therebetween.

일반적으로 복사기, 레이져 프린터 등에 사용되는 전자사진 장치는 도 1에 도시된 바와 같이 대전기(1)의 코로나 방전에 의해 감광드럼(2)의 표면이 골고루 대전되면 노광(3)에 의해 감광드럼(2)의 표면에 정전잠상이 생성되며, 생성된 잠상이 현상기(4)를 지나는 동안 토너로 현상되어 가시상으로 변하게 되고, 전사기(5)에 의해 가시상이 용지(6)로 전사된다.In general, an electrophotographic apparatus used for a copying machine, a laser printer, or the like has a photosensitive drum with an exposure (3) when the surface of the photosensitive drum (2) is evenly charged by corona discharge of the charger (1). An electrostatic latent image is generated on the surface of 2), and the latent image generated is developed with toner while passing through the developer 4 to become a visible image, and the visible image is transferred to the paper 6 by the transfer machine 5.

전사된 용지는 정착기(7)를 통과하면서 열 롤러와 압착 롤러에 의한 열과 압력이 가해져 용지의 상이 정착되며, 전사기(5)를 지나면서 감광드럼(2)의 표면에 잔여분의 토너와 잠상이 존재하는데, 토너는 클리너(8)에 의해 제거되고 잠상은 잠상제거 램프(9)에 의해 제거된다.The transferred paper is subjected to heat and pressure by the heat roller and the compression roller while passing through the fixing unit 7, and the image of the paper is fixed. The remaining toner and the latent image on the surface of the photosensitive drum 2 pass through the transfer unit 5. The toner is removed by the cleaner 8 and the latent image is removed by the latent image removal lamp 9.

여기에서, 감광드럼(2)의 대전은 고전압을 대전기(1)에 인가하여 감광 드럼(2)의 표면에 전하가 쌓여 일정한 표면전위를 갖게함으로써 이루어지는데, 대전된 감광드럼(2)에 노광(3)에 의해 주사된 빛의 양에 따라 감광드럼(2)의 표면에 쌓인 전하가 감광드럼(2)의 접지부재로 흐르게 되어 표면전위의 변화가 발생하게 되고, 감광드럼(2)이 회전하여 현상기(4) 위치에 이르면 표면전위에 따른 일정량의 토너가 감광드럼(2)의 표면에 부착된다.Here, charging of the photosensitive drum 2 is performed by applying a high voltage to the charger 1 to accumulate electric charges on the surface of the photosensitive drum 2 so as to have a constant surface potential, which is exposed to the charged photosensitive drum 2. The charge accumulated on the surface of the photosensitive drum 2 flows to the ground member of the photosensitive drum 2 according to the amount of light scanned by (3), resulting in a change in surface potential, and the photosensitive drum 2 rotates. When the developer reaches the position of the developer 4, a certain amount of toner is adhered to the surface of the photosensitive drum 2 according to the surface potential.

이때, 감광드럼(2)에서 접지로 전하를 흘리기 위한 감광드럼(2)의 통상적인 접지 구조는 도 2에 도시된 바와 같이 원통형의 감광드럼(2)의 양측에 회전축(10)을 지지하기 위한 구동측 지지부재(11)와 지지부재(15)가 각각 형성되어 있으며, 접지부재(12)의 한쪽은 구동측 지지부재(11)와 감광드럼(2) 사이에 압입되어 있고 다른 한쪽은 감광드럼(2)의 내부에서 회전축(10)에 접촉되어 있다.At this time, the conventional ground structure of the photosensitive drum 2 for flowing electric charges from the photosensitive drum 2 to the ground is for supporting the rotating shaft 10 on both sides of the cylindrical photosensitive drum 2 as shown in FIG. The driving side supporting member 11 and the supporting member 15 are formed, respectively, one side of the grounding member 12 is press-fitted between the driving side supporting member 11 and the photosensitive drum 2 and the other side of the photosensitive drum. It is in contact with the rotating shaft 10 inside (2).

감광드럼(2)의 일측에 설치된 구동측 지지부재(11)는 기어(13)와 일체로 형성되어 있고, 구동측 지지부재(11)와 지지부재(15)는 모두 도전성이 전혀 없는 플라스틱과 같은 재료가 사용되며, 감광드럼(2)과 구동측 지지부재(11) 사이에 별도로 압입설치된 접지 부재(12)가 감광드럼(2)과 회전축(10) 사이의 접지선 역할을 하게 된다.The drive side support member 11 provided on one side of the photosensitive drum 2 is integrally formed with the gear 13, and the drive side support member 11 and the support member 15 are both made of non-conductive plastic. A material is used, and a ground member 12 press-fitted separately between the photosensitive drum 2 and the driving side support member 11 serves as a ground wire between the photosensitive drum 2 and the rotation shaft 10.

이때, 감광드럼(2) 내부에서 회전축(10)에 접촉해 있는 접지부재(12)는 자체의 탄성력에 의해 회전축(12)에 접촉해 있는 상태이므로 접점이 불안하여 감광드럼(2) 회전시 접지불량이 발생하는 문제점이 있었다.At this time, since the ground member 12 which is in contact with the rotating shaft 10 in the photosensitive drum 2 is in contact with the rotating shaft 12 by its elastic force, the contact is unstable and the ground when the photosensitive drum 2 is rotated. There was a problem that a defect occurs.

본 고안은 이와 같은 문제점을 해결하기 위해 안출한 것으로 감광드럼과 회전축 사이의 지지부재를 도전성 재료로 형성하여 지지부재 자체가 접지선 역할을 하도록 함으로써 감광드럼의 접지 구조를 단순화하고 감광드럼의 접지불량을 방지하는데 그 목적이 있다.The present invention has been devised to solve such a problem. The support member between the photosensitive drum and the rotating shaft is formed of a conductive material so that the support member itself serves as a ground wire, thereby simplifying the grounding structure of the photosensitive drum and reducing the grounding failure of the photosensitive drum. The purpose is to prevent it.

도 1은 일반적인 전자사진 장치의 구조를 개략적으로 도시한 도면.1 schematically illustrates the structure of a typical electrophotographic apparatus.

도 2는 일반적인 감광드럼의 접지 구조를 나타낸 단면도.2 is a cross-sectional view showing a grounding structure of a general photosensitive drum.

도 3은 본 고안에 의한 감광드럼의 접지 구조를 나타낸 단면도.Figure 3 is a cross-sectional view showing the grounding structure of the photosensitive drum according to the present invention.

＜도면의 주요부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>

1 : 대전기 2 : 감광드럼 3 : 노광DESCRIPTION OF REFERENCE NUMERALS 1 charger 2 photosensitive drum 3 exposure

4 : 현상기 5 : 전사기 6 : 용지4: developing device 5: transferring machine 6: paper

7 : 정착기 8 : 클리너 9 : 잠상제거램프7: fuser unit 8: cleaner 9: latent image removal lamp

10 : 회전축 11 : 구동측 지지부재 12 : 접지부재DESCRIPTION OF SYMBOLS 10 Rotary shaft 11 Drive side support member 12 Grounding member

13 : 기어 14 : 구동측 고정부재 15 : 지지부재13 gear 14 driving side fixing member 15 supporting member

이와 같은 목적을 달성하기 위한 본 고안에 따른 감광드럼의 접지 구조는 감광드럼에 압입되어 회전축을 고정하는 지지부재를 도전성 재료로 사출하는 것을 특징으로 한다.The grounding structure of the photosensitive drum according to the present invention for achieving the above object is characterized in that the support member which is pressed into the photosensitive drum to fix the rotation axis to the conductive material.

이하, 도 2와 도 3을 참조하여 본 고안을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to FIGS. 2 and 3.

도 3은 본 고안에 의한 감광드럼 접지 구조의 일실시예를 도시한 단면도이다.3 is a cross-sectional view showing an embodiment of a photosensitive drum ground structure according to the present invention.

접지부재(12)가 제거되고, 감광드럼(2)의 양측에 압입되어 회전축(10)을 고정하는 구동측 고정부재(14)를 도전성 플라스틱과 같은 도전성 재료를 사용하여 사출하는 것 이외에는 일반적인 감광드럼(2)의 접지 구조와 동일하다.The general photosensitive drum is removed except that the grounding member 12 is removed and the driving side fixing member 14 press-fitted on both sides of the photosensitive drum 2 to fix the rotating shaft 10 is made using a conductive material such as a conductive plastic. It is the same as the grounding structure of (2).

대전기(1)에 의해 대전되어 표면에 전하가 쌓여 일정한 표면전위를 갖게된 감광드럼(2)에 노광(3)으로부터 주사된 빛의 양에 따라 감광드럼(2)의 표면에 쌓였던 전하가 감광드럼(2)으로부터 구동측 고정부재(14), 회전축(10), 전자사진 장치의 몸체(도시 안됨)를 차례로 거치면서 흐르게 되어 감광드럼(2)의 표면전위에 변화가 발생하게 된다.Charges accumulated on the surface of the photosensitive drum 2 are exposed to the photosensitive drum 2, which is charged by the charger 1 and accumulates on the surface and has a constant surface potential, depending on the amount of light scanned from the exposure 3. The drum 2 flows through the driving side fixing member 14, the rotating shaft 10, and the body of the electrophotographic apparatus (not shown) in order, thereby causing a change in the surface potential of the photosensitive drum 2.

따라서, 구동측 고정부재(14) 자체로서 접지부재 역할을 하게 되어 종래의 접지 구조에서 접지부재와 동일한 기능을 수행하면서 구조가 단순화되고, 접지 불량을 방지할 수 있게 된다.Therefore, the drive side fixing member 14 itself serves as a grounding member to perform the same function as the grounding member in the conventional grounding structure, simplifying the structure, it is possible to prevent a poor grounding.

여기에서, 감광드럼(2)의 양측에 각각 압입되어 회전축(10)을 지지 고정하는 구동측 고정부재(14)와 지지부재(15) 중에 어느 일측만을 도전성 재료로 하거나, 아니면 양측 모두를 도전성 재료로 하여도 접지효과는 동일하므로 제조원가 등을 고려하여 선택적으로 적용할 수 있다.Here, only one side of the driving side fixing member 14 and the supporting member 15, which are press-fitted to both sides of the photosensitive drum 2 to support and fix the rotating shaft 10, or both of them are conductive materials. Even if the grounding effect is the same, it can be selectively applied in consideration of manufacturing cost.

이상에서와 같이 본 고안에 의한 감광드럼의 접지 구조에 의하면 감광드럼과 회전축 간의 접지를 위해 별도의 접지부재를 사용하지 않고 감광드럼의 양측에 설치되어 회전축을 지지하는 지지부재 자체를 도전성 재료로 사출하여 설치함으로써 감광드럼의 접지 구조를 단순화할 수 있으므로 원가 절감의 효과가 있으며, 접지의 신뢰도를 높일 수 있는 잇점이 있다.As described above, according to the grounding structure of the photosensitive drum according to the present invention, the support member itself installed on both sides of the photosensitive drum to support the rotating shaft without using a separate grounding member for grounding between the photosensitive drum and the rotating shaft is injected into the conductive material. In this way, the grounding structure of the photosensitive drum can be simplified, thereby reducing the cost and increasing the reliability of the grounding.

Claims (2)

감광드럼의 접지 구조에 있어서, 상기 감광드럼(2)과, 상기 감광드럼(2)에 동력을 전달하기 위한 기어(13)와, 상기 감광드럼(2)의 일측에 설치되어 상기 회전축(10)을 고정하고 상기 기어(13)가 일체되어 있으며 도전성을 가져 상기 감광드럼(2)과 상기 회전축(10) 간에 접지선 역할을 하기 위한 구동측 고정부재(14)를 포함하는 것을 특징으로 하는 감광드럼의 접지 구조.In the ground structure of the photosensitive drum, the photosensitive drum (2), the gear 13 for transmitting power to the photosensitive drum (2), and is installed on one side of the photosensitive drum (2) is the rotating shaft (10) And a driving side fixing member (14) for fixing the gears (13) and having a conductivity to serve as a ground wire between the photosensitive drum (2) and the rotating shaft (10). Grounding structure. 제 1 항에 있어서, 상기 구동측 고정부재(14)의 재질은 도전성 플라스틱인 것을 특징으로 하는 감광드럼의 접지 구조.The grounding structure of a photosensitive drum according to claim 1, wherein the driving side fixing member (14) is made of a conductive plastic.
KR2019960029661U 1996-09-17 1996-09-17 Earthing structure of exposure drum KR0133527Y1 (en)

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KR0133527Y1 true KR0133527Y1 (en) 1999-03-30

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