KR950000410B1 - Developing gap adjusting device - Google Patents

Developing gap adjusting device Download PDF

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Publication number
KR950000410B1
KR950000410B1 KR1019920019811A KR920019811A KR950000410B1 KR 950000410 B1 KR950000410 B1 KR 950000410B1 KR 1019920019811 A KR1019920019811 A KR 1019920019811A KR 920019811 A KR920019811 A KR 920019811A KR 950000410 B1 KR950000410 B1 KR 950000410B1
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South Korea
Prior art keywords
developing
drum
shaft
housing
gap
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KR1019920019811A
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Korean (ko)
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KR940009773A (en
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김동귀
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삼성전자 주식회사
정용문
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Priority to KR1019920019811A priority Critical patent/KR950000410B1/en
Publication of KR940009773A publication Critical patent/KR940009773A/en
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Publication of KR950000410B1 publication Critical patent/KR950000410B1/en

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern

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

Abstract

A developing gap control device of an electrophotographic processor uniformly maintains a developing gap between a latent image carrier drum and developing rollers supplying developing material in a duplicating apparatus or an office instrument. The device is constructed that within a drum housing a shaft is set, a collar is set on both sides of a developing sleeve set within a developing housing, on its upper side a hinge shaft is set, on its lower side a support shaft is formed a left side of a bracket is inserted into the drum shaft, its lower side is inserted into the support shaft, and a holding bracket is fixed to an upper frame. The gap between the photosensitive drum and the developing sleeve is thus maintained in a close relationship between the photosensitive drum and the collar.

Description

전자사진 프로세서의 현상갭 조절장치Development gap control of electrophotographic processor

제 1 도는 본 발명의 구성도.1 is a block diagram of the present invention.

제 2 도는 제 1 도의 A-A선 단면도.2 is a cross-sectional view taken along the line A-A of FIG.

제 3 도는 기기내부에 장착된 현상갭 유지 상태도.3 is a developing gap holding state mounted inside the apparatus.

제 4 도는 기기외부에 있을때 현상갭 상태도.4 is a development gap state diagram when outside the apparatus.

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

1 : 드럼하우징 2 : 감광드럼1: Drum housing 2: Photosensitive drum

3 : 드럼샤프트 4 : 현상하우징3: drum shaft 4: developing housing

5 : 현상슬리브 6 : 칼라5: developing sleeve 6: color

7 : 서포트 샤프트 8 : 힌지샤프트7: support shaft 8: hinge shaft

9 : 브라켓 10 : 스크류9: bracket 10: screw

11 : 상부프레임 12 : 장공11: upper frame 12: long hole

본 발명은 레이저 프린터, 복사기등 사무기기에 사용되는 전자사진의 잠상 매개체인 드럼과 현상제를 공급하는 현상롤러 사이의 현상갭을 일정하게 유지하기 위한 현상갭 조절장치에 관한 것이다.The present invention relates to a developing gap adjusting device for maintaining a constant developing gap between a drum which is a latent image medium of an electrophotographic used in office equipment such as a laser printer, a copying machine, and a developing roller for supplying a developer.

종래에는 현상존에서의 현상갭을 맞추기 위하여 드럼카트리지와 현상카트리지가 고정되는 사이드 프레임에 드럼과 현상카트리지에 형성된 샤프트를 지지하는 진입가이드를 형성하여 그 상대 거리로서 현상갭을 유지하거나 현상 카트리지를 판스프링이나 압축스프링을 이용하여 드럼쪽으로 밀어줌으로서 드럼과 현상롤러사이의 현상갭이 유지되도록 하였다.Conventionally, in order to match the developing gap in the developing zone, an entry guide for supporting the shaft formed on the drum and the developing cartridge is formed on the side frame where the drum cartridge and the developing cartridge are fixed, thereby maintaining the developing gap as a relative distance or selling the developing cartridge. The developing gap between the drum and the developing roller was maintained by pushing it toward the drum using a spring or a compression spring.

상기와 같은 현상갭 조절장치는 드럼과 현상카트리지의 샤프트가 사이드 프레임에 형성된 진입 가이드를 통하여 드럼과 현상카트리지가 가이드 형상에 의하여 기기내부에 장착되어 카트리지 완전히 고정되어 현상갭을 사이드 프레임에 의하여 결정되는 것이다.In the developing gap adjusting apparatus as described above, the drum and the developing cartridge are mounted inside the apparatus by the guide shape through the entry guide formed in the side frame of the drum and the developing cartridge so that the cartridge is completely fixed so that the developing gap is determined by the side frame. will be.

이러한 현상갭 조절장치는 현상갭을 맞추기 위하여 사이드 프레임의 가이드 설계와 가공 정밀도에 의해 현상갭을 유지하게 되므로 좌, 우 갭을 똑같이 유지한다는 것은 거의 불가능한 문제점이 있다.Since the developing gap adjusting device maintains the developing gap by the guide design of the side frame and the processing precision in order to match the developing gap, it is almost impossible to maintain the same left and right gap.

상기와 같은 문제점을 보완한 종래의 다른 실시예로서 드럼유니트가 기기내부에 장착된 후 현상카트리지를 장착하면 기기내부에 일측에 설치된 스프링이 현상카트리지를 드럼쪽으로 밀게 설치하여 드럼과 현상슬리브간의 현상갭이 유지되도록 한 것이다.As another embodiment of the related art, in which a drum unit is mounted inside a device, and a developing cartridge is mounted, a spring installed on one side of the device pushes the developing cartridge toward the drum, thereby developing a gap between the drum and the developing sleeve. This is to be maintained.

그러나 이러한 종래의 현상갭 조절장치는 현상카트리지가 드럼카트리지에 밀착할 때 스프링의 좌, 우 압착력이 다르거나 설계상 혹은 부품가공 기타 조립등에서 오차가 발생하면 좌, 우 농도가 불균일하여 화상이 불안정한 문제점이 있었다.However, such a conventional developing gap adjusting device has a problem that the image is unstable due to uneven concentration of left and right when the developing cartridge is in close contact with the drum cartridge when the left and right pressing force of the spring is different or an error occurs in the design or part processing or assembly. There was this.

본 발명은 상기와 같은 문제점을 해소하기 위하여 안출된 것으로서 전자사진 프로세서의 현상갭 조절장치는 드럼과 현상카트리지가 기기내부에 장착되었을때 자동적으로 설계된 현상갭을 유지할 수 있도록 하여 최적 현상조건을 제공함에 본 발명의 목적이 있다.The present invention has been made to solve the above problems, the developing gap adjusting device of the electrophotographic processor is to provide the optimum developing conditions by maintaining the designed developing gap automatically when the drum and the developing cartridge is mounted inside the device. There is an object of the present invention.

또다른 목적은 카트리지가 기기외부에 있을때에는 드럼과 현상롤러상의 칼라가 떨어지도록 하여 드럼에 접촉압력을 해제할 수 있도록 함을 본 고안의 목적이 있다.Another object of the present invention is to release the contact pressure on the drum by causing the collar and the drum on the developing roller to fall when the cartridge is outside the machine.

상기와 같은 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.

우선 제 1, 2 도를 참조하여 본 발명의 구성을 설명하면 드럼하우징(1)내에 감광드럼(2)이 회동되게 샤프트(3)을 설치하고 일측에 현상하우징(4)내에 설치된 현상슬리브(5) 양측에 칼라(6)를 설치하고 상측에 현상하우징(4)이 회전되게 힌지샤프트(8)을 설치하고 하측에는 서포트 샤프트(7)을 형성하여 브라켓(9)의 좌측은 드럼샤프트(3)에 끼우고 하측은 장공(9a)을 이루어 서포트 샤프트(7)에 끼워 설치하고 상기 현상하우징(4)을 정방향으로 회전되게 상, 측에 압력보턴(14)이 밀착되도록 압축스프링(13)이 설치된 홀딩 브라켓(12)을 상부프레임(11)에 고정하여 상기 감광드럼(2)에 칼라(6)가 밀착되어 감광드럼(2)과 현상슬리브(5) 사이의 갭(G)을 유지할 수 있도록 설치된 것이다.First, the configuration of the present invention will be described with reference to FIGS. 1 and 2, in which a shaft 3 is installed in the drum housing 1 so that the photosensitive drum 2 is rotated, and a developing sleeve 5 installed in the developing housing 4 on one side thereof. ) The collar 6 is installed at both sides, and the hinge shaft 8 is installed at the upper side so that the developing housing 4 is rotated. The support shaft 7 is formed at the lower side, and the left side of the bracket 9 is the drum shaft 3. And the lower side has a long hole (9a) is installed in the support shaft (7) and the compression spring 13 is installed so that the pressure button 14 is in close contact with the upper and the side to rotate the developing housing (4) in the forward direction. The holding bracket 12 is fixed to the upper frame 11 so that the collar 6 is in close contact with the photosensitive drum 2 so as to maintain the gap G between the photosensitive drum 2 and the developing sleeve 5. will be.

이와 같이 구성된 본 발명의 작용효과는 다음과 같다.Effects of the present invention configured as described above are as follows.

드럼하우징(1)에 설치된 감광드럼(2)과 현상하우징(4)에 설치된 현상슬리브(6) 사이의 현상갭(G)을 조절하고 유지하기 위하여 브라켓(9)이 샤프트(3)에 끼워져 스크류(10)로 드럼하우징(1)과 고정설치되고 상기 브라켓(9)의 우측이 현상하우징(4)의 힌지샤프트(8)와 서포트 샤프트(7)에 끼워진 상태에서 드럼하우징(1)과 현상하우징(4)이 시스템 내부에 장착이 되면 연결브라켓(9)에 끼워진 드럼샤프트(3)에 의해 카트리지가 사이드프레임(15)에 장착이 되면 현상하우징(4)의 현상 카트리지는 힌지샤프트(8)를 기준으로 자중에 의해 시계방향으로 회전하는 힘이 생기게 되므로 현상슬리브(5) 양측에 설치된 칼라(6)가 감광드럼(2) 표면에 접촉하여 이때 감광드럼(2)과 현상슬리브(5) 사이에 최적의 현상갭(G)이 유지된다.The bracket 9 is fitted to the shaft 3 to adjust and maintain the developing gap G between the photosensitive drum 2 installed in the drum housing 1 and the developing sleeve 6 installed in the developing housing 4. The drum housing 1 and the developing housing are fixedly installed with the drum housing 1 and the right side of the bracket 9 is fitted to the hinge shaft 8 and the support shaft 7 of the developing housing 4. When the cartridge (4) is mounted inside the system and the cartridge is mounted on the side frame (15) by the drum shaft (3) inserted into the connecting bracket (9), the developer cartridge of the developing housing (4) is connected to the hinge shaft (8). Since a force that rotates in a clockwise direction due to its own weight is generated as a reference, the collar 6 provided on both sides of the developing sleeve 5 contacts the surface of the photosensitive drum 2, and at this time, between the photosensitive drum 2 and the developing sleeve 5. The optimum developing gap G is maintained.

한편, 이때 현상하우징(4)의 하측 한부분에 돌출되어 있는 서포트 샤프트(7)는 현상하우징(4)의 자중을 지지하는 역할을 수행하며 이 샤프트(7)는 연결 브라켓(9)의 장공(9a)에 끼워져 있으므로 내부에서 현상카트리지가 필요이상으로 회전운동하는 것을 방지하는 역할도 수행하게 설치된 것이다.On the other hand, the support shaft (7) protruding from the lower portion of the developing housing (4) serves to support the weight of the developing housing (4) and the shaft (7) is a long hole (of the connecting bracket 9) 9a) is installed so as to prevent the developing cartridge from rotating more than necessary inside.

또한 상부프레임(11)에 설치된 압력보턴(14)과 홀딩브라켓(12) 및 압축스프링(13)은 상부플레임(11)이 닫혔을때 현상슬리브(5)가 감광드럼(2)에 쉽게 접근하도록 힌지샤프트(8)을 중심으로 현상카트리지가 시계방향으로 회전하는 것을 도와주는 보조수단이다.In addition, the pressure button 14, the holding bracket 12, and the compression spring 13 installed on the upper frame 11 may allow the developing sleeve 5 to easily approach the photosensitive drum 2 when the upper frame 11 is closed. It is an auxiliary means to help the developing cartridge to rotate clockwise about the hinge shaft (8).

제 3 도에서와 같이 감광드럼(2)과 현상하우징(4)이 시스템 내부에 장착되어 전자사진 프로세서를 동작시킬때의 현상갭(G)이 유지되는 상태도이며 제 4 도는 드럼(2)과 현상하우징(4)이 기기외부로 나왔을때 현상하우징(4)이 힌지샤프트(8)을 중심으로 반시계 방향으로 회전하여 현상슬리브(5)상의 칼라(6)가 감광드럼(2)에서 분리되어 있는 상태인 것이다.As shown in FIG. 3, the photosensitive drum 2 and the developing housing 4 are mounted inside the system to maintain the developing gap G when operating the electrophotographic processor. When the housing 4 comes out of the device, the developing housing 4 is rotated counterclockwise around the hinge shaft 8 so that the collar 6 on the developing sleeve 5 is separated from the photosensitive drum 2. It is

상기와 같은 본 발명에 의하면 현상하우징이 힌지샤프트를 중심으로 자중 및 보조수단에 의해 항상 감광드럼 방향으로 압착력이 작용하므로 부품가공 및 조립상에 오차가 발생하여도 현상 존에서도 항상 일정한 현상갭을 유지할 수 있고, 카트리지가 기기외부에 있을 때 현상칼라가 감광드럼에서 분리됨으로서 드럼에 접촉 압력을 해제할 수 있는 잇점이 있다.According to the present invention as described above, since the pressing force acts in the photosensitive drum direction by self-weight and auxiliary means around the hinge shaft, the developing housing can always maintain a constant developing gap even in the developing zone even when an error occurs in processing and assembling the parts. In addition, there is an advantage that the developing color is released from the photosensitive drum when the cartridge is outside the apparatus, thereby releasing the contact pressure to the drum.

Claims (1)

전자사진 프로세서의 현상갭 조절장치에 있어서, 드럼하우징(1)내에 감광드럼(2)이 회동되게 샤프트(3)를 설치하고 일측에 현상하우징(4)내에 설치된 현상슬리브(5) 양측에 칼라(6)를 설치하고 상측에 현상하우징(4)이 회전되게 힌지샤프트(8)을 설치하고 하측에는 서포트 샤프트(7)을 형성하여 브라켓(9)의 좌측은 드럼샤프트(3)에 끼우고 하측은 장공(9a)을 이루어 서포트 샤프트(7)에 끼워 설치하고 상기 현상하우징(4)을 정방향으로 회전되게 상, 측에 압력보턴(14)이 밀착되도록 압축스프링(13)이 설치된 홀딩 브라켓(12)을 상부프레임(11)에 고정하여 상기 감광드럼(2)에 칼라(6)가 밀착되어 감광드럼(2)과 현상슬리브(5) 사이의 갭(G)을 유지할 수 있도록 설치된 것을 특징으로 하는 전자사진 프로세서의 현상갭 조절장치.In the developing gap adjusting device of an electrophotographic processor, a shaft (3) is installed in a drum housing (1) so that the photosensitive drum (2) is rotated, and a collar (on both sides of a developing sleeve (5) installed in the developing housing (4) on one side). 6) and the hinge shaft 8 is installed so that the developing housing 4 is rotated on the upper side, and the support shaft 7 is formed on the lower side, and the left side of the bracket 9 is inserted into the drum shaft 3 and the lower side is Holding bracket (12) provided with a compression spring (13) so that the pressure spring (14) comes into close contact with the developing housing (4), and is installed in the support shaft (7) by making a long hole (9a). To the upper frame 11 so that the collar 6 is in close contact with the photosensitive drum 2 so as to maintain a gap G between the photosensitive drum 2 and the developing sleeve 5. Development gap control of photo processor.
KR1019920019811A 1992-10-27 1992-10-27 Developing gap adjusting device KR950000410B1 (en)

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KR1019920019811A KR950000410B1 (en) 1992-10-27 1992-10-27 Developing gap adjusting device

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KR1019920019811A KR950000410B1 (en) 1992-10-27 1992-10-27 Developing gap adjusting device

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KR940009773A KR940009773A (en) 1994-05-24
KR950000410B1 true KR950000410B1 (en) 1995-01-19

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