KR200168094Y1 - Structure for opening and shutting cover of image forming device - Google Patents

Structure for opening and shutting cover of image forming device Download PDF

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Publication number
KR200168094Y1
KR200168094Y1 KR2019990015852U KR19990015852U KR200168094Y1 KR 200168094 Y1 KR200168094 Y1 KR 200168094Y1 KR 2019990015852 U KR2019990015852 U KR 2019990015852U KR 19990015852 U KR19990015852 U KR 19990015852U KR 200168094 Y1 KR200168094 Y1 KR 200168094Y1
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KR
South Korea
Prior art keywords
cover
opening
coil spring
rack
image forming
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KR2019990015852U
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Korean (ko)
Inventor
조용곤
Original Assignee
삼성전자주식회사
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Priority to KR2019990015852U priority Critical patent/KR200168094Y1/en
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Publication of KR200168094Y1 publication Critical patent/KR200168094Y1/en

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Classifications

    • 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
    • B41J29/12—Guards, shields or dust excluders
    • B41J29/13—Cases or covers
    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/04—Sound-deadening or shock-absorbing devices or measures therein
    • B41J19/06—Resilient mounting of mechanism
    • 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
    • B41J29/54—Locking devices applied to printing mechanisms

Abstract

본 고안은 화상형성장치의 커버 개폐 구조에 관한 것으로, 본체에는 커버가 회전 가능하게 장착되며, 커버는 비틀림코일스프링의 탄성력에 의해 오픈 방향으로 탄지되고, 커버의 하단에는 피니언이 회전 가능하게 결합되며, 본체에는 피니언이 연결되는 래크가 힌지를 중심으로 하여 회전 가능하게 설치되고, 래크와 본체 사이에는 코일스프링이 설치되며, 코일스프링의 일단은 래크의 힌지포인트의 하측에 고정된다.The present invention relates to a cover opening and closing structure of the image forming apparatus, the cover is rotatably mounted to the main body, the cover is supported in the open direction by the elastic force of the torsion coil spring, the pinion is rotatably coupled to the bottom of the cover In the main body, the rack to which the pinion is connected is rotatably installed around the hinge, and a coil spring is installed between the rack and the main body, and one end of the coil spring is fixed to the lower side of the hinge point of the rack.

이와 같이 구성된 본 고안에 의하면, 커버의 오픈시 커버와 일체로 피니언이 공전 및 래크를 따라 자전하게 되며, 래크는 코일스프링의 탄성력에 의해 힌지를 중심으로 하여 피니언측으로 회전하게 되어 커버가 오픈될수록 피니언과 래크 사이의 부하가 커지게 되어 커버를 지지하는 비틀림코일스프링의 탄성력이 작아지므로 커버는 서서히 개폐된다.According to the present invention configured as described above, when the cover is opened, the pinion rotates along the revolution and the rack integrally with the cover, and the rack rotates toward the pinion side around the hinge by the elastic force of the coil spring so that the pinion is opened as the cover is opened. Since the load between the and rack increases, the elastic force of the torsion coil spring supporting the cover decreases, so that the cover opens and closes gradually.

이에 의하여, 커버가 급작스럽게 개폐되지 않으므로 제품의 파손이 방지 및 소음이 발생되지 않게 된다.As a result, since the cover is not opened and closed abruptly, damage of the product is prevented and noise is not generated.

Description

화상형성장치의 커버 개폐 구조{STRUCTURE FOR OPENING AND SHUTTING COVER OF IMAGE FORMING DEVICE}Cover opening and closing structure of image forming apparatus {STRUCTURE FOR OPENING AND SHUTTING COVER OF IMAGE FORMING DEVICE}

본 고안은 화상형성장치의 커버 개폐 구조에 관한 것으로, 더욱 상세하게는 커버가 부드럽게 개폐되도록 한 화상형성장치의 커버 개폐 구조에 관한 것이다.The present invention relates to a cover opening and closing structure of the image forming apparatus, and more particularly to a cover opening and closing structure of the image forming apparatus to open and close the cover smoothly.

일반적으로, 프린터, 복합기, 팩시밀리 등의 화상형성장치의 메카니즘은 크게 본체와, 본체에 개폐 가능하게 설치되며 조작키가 장착되는 커버와, 용지를 급지하는 급지장치, 용지를 이송시키는 이송장치, 이송되는 용지 표면에 화상을 형성하는 인쇄장치, 인쇄가 완료된 용지를 배출시키는 배출장치를 기본으로 한다.In general, the mechanism of an image forming apparatus such as a printer, a multifunction printer, a facsimile machine, etc. is largely installed in the main body, the main body, a cover to which the operation keys are mounted, a paper feeder for feeding paper, a paper feeder for conveying paper, and a transport. It is based on the printing apparatus which forms an image on the surface of the paper which will be used, and the discharge apparatus which discharges the printed paper.

이와 같이 화상형성장치에 적용되는 커버의 개폐 구조를 프린터로 예를 들어 설명하면 다음과 같다.The opening and closing structure of the cover applied to the image forming apparatus as described above will be described with a printer as an example.

도 1은 커버의 개폐 구조를 보인 측면도로, 커버(1)는 본체(2)에 회전축(3)을 매개로 하여 회전 가능하게 설치되어 회전 동작에 의해 개폐되며, 커버(1)는 비틀림코일스프링(4)에 의해 오픈 방향으로 탄지되고, 이러한 커버(1)는 별도의 록킹장치에 의해 록킹 상태를 유지하게 된다.1 is a side view showing the opening and closing structure of the cover, the cover 1 is rotatably installed on the main body 2 via the rotation shaft 3, and is opened and closed by a rotation operation, the cover 1 is a torsion coil spring The cover 1 is held in the open direction by (4), and the cover 1 is kept in a locked state by a separate locking device.

록킹장치는 커버측의 걸림부(1a)에 록킹되는 록커(5)와, 록커(5)를 조작하기 위한 버튼(6)과, 록커(5)를 록킹방향으로 탄력 지지하는 코일스프링(미도시)으로 구성된다.The locking device includes a locker 5 locked to the engaging portion 1a on the cover side, a button 6 for operating the locker 5, and a coil spring for elastically supporting the locker 5 in the locking direction (not shown). It is composed of

이와 같이 구성된 종래 기술에 따른 커버의 개폐 동작을 설명하면 다음과 같다.Referring to the opening and closing operation of the cover according to the prior art thus configured as follows.

커버(1)가 닫힌 상태는 록커(5)가 코일스프링의 탄성력에 의해 커버측의 걸림부(1a)에 록킹되어 닫힘 상태가 유지된다.In the state in which the cover 1 is closed, the locker 5 is locked to the engaging portion 1a on the cover side by the elastic force of the coil spring, thereby maintaining the closed state.

그리고, 현상기(미도시)를 탈거하거나 용지 걸림이 발생되면 이를 해소하기 위해 커버(1)를 오픈하게 되며, 커버(1)를 오픈하기 위해 버튼(6)을 누르면 록커(5)가 코일스프링의 탄성력을 이기며 측방으로 이동되면서 커버측의 걸림부(1a)로부터 이격된다.Then, when the developer (not shown) is removed or a paper jam occurs, the cover 1 is opened to solve the problem. When the button 6 is pressed to open the cover 1, the locker 5 is connected to the coil spring. While moving sideways while winning the elastic force is spaced apart from the locking portion (1a) of the cover side.

이렇게 되면, 커버(1)를 지지하는 비틀림코일스프링(4)의 탄성력에 의해 커버(1)가 회전축(4)과 함께 회전되면서 오픈된다.In this case, the cover 1 is opened while being rotated together with the rotation shaft 4 by the elastic force of the torsion coil spring 4 supporting the cover 1.

반대로, 오픈 상태의 커버(1)를 닫기 위해 커버(1)를 오픈시와 반대 방향으로 회전시키면, 커버(1)에 가해진 힘에 의해 비틀림코일스프링(4)의 탄성력을 이기면서 서서히 오픈시와 반대 방향으로 회전되면서 닫히게 되며, 커버(1)가 닫히다가 걸림부(1a)에 록커(5)가 위치되면 록커(5)가 이동되다가 걸림부(1a)가 록커(5)를 지나게 되면 코일스프링에 의해 록커(5)가 원위치로 복귀되면서 걸림부(1a)에 록킹된다.On the contrary, when the cover 1 is rotated in a direction opposite to that of the open state to close the open cover 1, the force applied to the cover 1 overcomes the elastic force of the torsion coil spring 4 and gradually opens. The cover 1 is closed while being rotated in the opposite direction. When the locker 5 is positioned at the catching portion 1a while the cover 1 is closed, the locker 5 is moved, and the catching spring 1a passes through the locker 5 and the coil spring is closed. By the locker 5 is returned to its original position by the locking to the locking portion (1a).

그런데, 상기와 같이 구성된 종래 기술에 따른 커버의 개폐 구조에 의하면, 별도의 작업없이 커버(1)가 오픈되도록 비틀림코일스프링(4)을 사용하게 되는 바, 커버(1)가 급작스럽게 오픈되므로 커버(1)가 완전히 오픈되는 시점에서 커버(1)에 충격이 가해져 제품이 쉽게 파손됨은 물론, 극심한 소음이 발생되는 문제점이 있다.By the way, according to the opening and closing structure of the cover according to the prior art configured as described above, the torsion coil spring (4) to be used so that the cover (1) is opened without a separate operation, the cover (1) is opened suddenly open the cover When (1) is completely opened, the shock is applied to the cover 1, the product is easily damaged, there is a problem that extreme noise is generated.

본 고안은 전술한 문제점을 해소하기 위해 안출된 것으로, 커버가 급작스럽게 오픈되지 않고 부드럽게 오픈되도록 하여 제품의 파손을 방지 및 소음이 발생되되지 않도록 한 화상형성장치의 커버 개폐 구조를 제공하려는데 그 목적이 있다.The present invention has been made to solve the above-mentioned problems, to provide a cover opening and closing structure of the image forming apparatus to prevent the damage of the product and to prevent noise caused by opening the cover gently without sudden opening. have.

도 1은 종래 기술에 따른 커버의 개폐 구조를 도시한 측면도.1 is a side view showing the opening and closing structure of the cover according to the prior art.

도 2는 본 고안의 실시예에 의한 커버의 개폐 구조를 보인 측면도.Figure 2 is a side view showing the opening and closing structure of the cover according to an embodiment of the present invention.

도 3은 본 고안의 실시예에 의한 커버의 오픈 동작을 나타낸 측면도.Figure 3 is a side view showing the opening operation of the cover according to an embodiment of the present invention.

도 4는 본 고안에 의한 실시예에 적용된 댐핑수단의 평면도.Figure 4 is a plan view of the damping means applied to the embodiment according to the present invention.

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

1 : 커버 2 : 본체1: cover 2: body

3 : 회전축 4 : 비틀림코일스프링3: rotating shaft 4: torsion coil spring

5 : 록커 6 : 버튼5: rocker 6: button

10 : 가드 브래킷 20 : 피니언10: guard bracket 20: pinion

30 : 래크 31 : 힌지30: rack 31: hinge

32 : 코일스프링32: coil spring

상기 목적을 달성하기 위한 본 고안에 따른 화상형성장치의 커버 개폐 구조는, 본체에 회동 가능하게 설치되는 커버와, 상기 커버를 상기 본체에 록킹시키는 록킹장치와, 상기 록킹장치를 해제시키는 해제장치와, 상기 커버를 오픈 방향으로 탄력 지지하는 탄성부재와, 상기 커버의 개폐를 원활하게 하는 댐핑수단을 포함하여 이루어진 것을 특징으로 한다.Cover opening and closing structure of the image forming apparatus according to the present invention for achieving the above object, the cover is rotatably installed on the main body, a locking device for locking the cover to the main body, a release device for releasing the locking device and It characterized in that it comprises an elastic member for elastically supporting the cover in the open direction, and a damping means for smoothly opening and closing the cover.

상기 댐핑수단은 상기 커버에 회동 가능하게 설치되는 구름부재와, 상기 본체에 설치되며 상기 구름부재와 소정 압력으로 접촉되면서 상기 구름부재의 구름을 안내하는 안내부재를 포함하여 이루어진 것이 바람직하다.Preferably, the damping means includes a rolling member rotatably installed on the cover, and a guide member installed on the main body and guided to the rolling member while contacting the rolling member at a predetermined pressure.

상기 안내부재는 소정 각도내에서 회동 가능하게 힌지를 매개로 하여 회전 가능하게 결합되며, 상기 안내부재의 후방에는 상기 안내부재를 탄력 지지하는 탄성부재가 설치되는 것이 바람직하다.The guide member is rotatably coupled via a hinge so as to be rotatable within a predetermined angle, and an elastic member for elastically supporting the guide member is installed at the rear of the guide member.

상기 탄성부재의 일단은 상기 안내부재의 힌지의 하측에 연결되어 상기 커버가 오픈될수록 상기 안내부재와 상기 구름부재 사이의 마찰 저항을 크게하는 것이 바람직하다.One end of the elastic member is connected to the lower side of the hinge of the guide member is preferably increased the frictional resistance between the guide member and the rolling member as the cover is opened.

이하, 첨부 도면을 참조로 하여 본 고안의 바람직한 실시예에 따른 화상형성장치의 커버 개폐 구조를 상세히 설명하면 다음과 같다.Hereinafter, the cover opening and closing structure of the image forming apparatus according to an embodiment of the present invention with reference to the accompanying drawings in detail as follows.

도 2는 본 고안에 의한 실시예의 구조를 보인 측면도이며, 도 3은 본 고안의 실시예에 따른 커버의 오픈 동작을 도시한 측면도이고, 도 4는 본 고안에 의한 실시예에 적용된 댐핑수단의 평면도이다. 설명의 편의를 위해 종래와 동일한 구성부재에 대해서는 동일한 부재번호를 부여한다.Figure 2 is a side view showing the structure of an embodiment according to the present invention, Figure 3 is a side view showing the opening operation of the cover according to an embodiment of the present invention, Figure 4 is a plan view of the damping means applied to the embodiment according to the present invention to be. For convenience of description, the same member numbers are assigned to the same constituent members as in the prior art.

이에 도시된 바와 같이, 본 고안 화상형성장치의 커버 개폐 구조는, 본체(2)의 전방측에는 커버(1)가 설치되며, 커버(1)의 하단에는 회전축(3)이 결합되어 회전축(3)과 함께 회전되고, 회전축(3)의 양단에는 커버(1)를 오픈 방향으로 탄력 지지하는 비틀림코일스프링(4)이 각각 결합되며, 커버(1)의 록킹을 위해 커버(1)에는 걸림부(1a)가 형성되고, 본체(2)에는 걸림부(1a)에 록킹되는 록커(5)가 코일스프링(미도시)을 매개로 하여 설치되며, 록커(5)에는 버튼(6)이 연결된다.As shown in the figure, the cover opening and closing structure of the subject innovation image forming apparatus, the cover 1 is provided on the front side of the main body 2, the rotary shaft 3 is coupled to the lower end of the cover 1, the rotary shaft 3 And the torsion coil springs 4 which are elastically supporting the cover 1 in the open direction at both ends of the rotation shaft 3, respectively, and the locking portion is locked to the cover 1 for locking the cover 1. 1a is formed, a locker 5 locked to the locking portion 1a is installed in the main body 2 via a coil spring (not shown), and a button 6 is connected to the locker 5.

그리고, 커버(1)의 하단에는 가드 브래킷(10)이 볼트(11) 체결되며, 가드 브래킷(10)에는 피니언(20)이 회전 가능하게 결합되고, 본체(2)에는 피니언(20)이 연결되는 래크(30)가 설치된다.In addition, the guard bracket 10 is fastened to the lower end of the cover 1 by bolts 11, the pinion 20 is rotatably coupled to the guard bracket 10, and the pinion 20 is connected to the main body 2. The rack 30 is installed.

래크(30)는 중앙의 힌지(31)를 중심으로 하여 소정 각도내에서 회전 가능하게 설치되며, 그 후방에는 코일스프링(32)이 장착되고, 코일스프링(32)의 일단은 힌지(31)의 하측에 연결되어 래크(30)의 상단을 피니언(20)측으로 지지하게 된다.The rack 30 is rotatably installed within a predetermined angle around the central hinge 31, and a coil spring 32 is mounted at the rear thereof, and one end of the coil spring 32 is connected to the hinge 31. It is connected to the lower side to support the upper end of the rack 30 to the pinion 20 side.

이와 같이 구성된 본 고안에 의한 실시예의 작용 상태를 설명하면 다음과 같다.Referring to the working state of the embodiment according to the present invention configured as described above are as follows.

초기 커버(1)가 닫힌 상태는 록커(5)가 커버(1)의 걸림부(1a)에 록킹되어 커버(1)를 닫힌 상태로 유지시키게 되며, 이 때, 피니언(20)은 래크(30)의 최하단에 고정되어 있다.In the state where the initial cover 1 is closed, the locker 5 is locked to the latching portion 1a of the cover 1 to keep the cover 1 closed, and at this time, the pinion 20 is the rack 30 It is fixed at the bottom of).

한편, 커버(1)의 오픈을 위해 버튼(6)을 누르게 되면, 록커(5)가 걸림부(1a)로부터 이격되며, 이 순간 커버(1)를 오픈 방향으로 탄력 지지하는 비틀림코일스프링(4)에 의해 커버(1)가 A 방향으로 회전하게 된다.On the other hand, when the button 6 is pressed to open the cover 1, the locker 5 is spaced apart from the locking portion 1a, and the torsion coil spring 4 which elastically supports the cover 1 in the open direction at this moment. ) Rotates the cover 1 in the A direction.

커버(1)의 오픈되면서 피니언(20)은 래크(30)를 따라 슬라이딩되며, 동시에, 코일스프링(32)의 탄성력이 작용되어 래크(30)가 힌지(31)를 중심으로 하여 B 방향으로 회전하면서 각 부품(20)(30)의 사이에는 부하가 커지게 된다. 즉, 커버(1)를 오픈시키는 비틀림코일스프링(4)의 탄성력이 피니언(20)과 래크(30)사이의 부하에 의해 작아지게 되어 커버(1)는 서서히 오픈된다.The pinion 20 is slid along the rack 30 while the cover 1 is opened, and at the same time, the elastic force of the coil spring 32 is applied so that the rack 30 rotates in the B direction about the hinge 31. While the load is increased between the parts 20, 30. That is, the elastic force of the torsion coil spring 4 which opens the cover 1 is reduced by the load between the pinion 20 and the rack 30, and the cover 1 is gradually opened.

반대로, 오픈 상태의 커버(1)를 닫기 위해 커버(1)를 A 반대 방향으로 회전시키면, 피니언(20)은 래크(30)를 따라 하측으로 슬라이딩되며, 피니언(20)이 래크(3)를 따라 슬라이딩되면서 부하가 작아지게 되므로 커버(1)는 무리한 힘을 가하지 않아도 닫히게 되며, 커버(1)의 록킹 동작은 종래와 동일하므로 생략하기로 한다.On the contrary, when the cover 1 is rotated in the opposite direction to A to close the open cover 1, the pinion 20 slides downward along the rack 30, and the pinion 20 lifts the rack 3. As the load decreases while sliding, the cover 1 is closed without applying excessive force, and the locking operation of the cover 1 is the same as in the related art, and thus will be omitted.

따라서, 커버(1)의 개폐시 커버(1)를 오픈 방향으로 탄력 지지하는 비틀림코일스프링(4)의 탄성력이 작아져 커버(1)가 종래와 같이 순간적으로 오픈되지 않고 서서히 개폐된다.Therefore, the elastic force of the torsion coil spring 4 which elastically supports the cover 1 in the open direction at the time of opening and closing of the cover 1 becomes small, so that the cover 1 is gradually opened and closed without being instantaneously opened as in the prior art.

이상에서 살펴본 바와 같이 본 고안에 따른 화상형성장치의 커버 개폐 구조에 의하면, 커버가 서서히 개폐되어 완전히 오픈되는 시점에서 커버에 충격이 가해지지 않으므로 제품의 파손이 방지되며, 아울러, 소음이 발생되지 않으므로 제품의 신뢰성을 향상시킬 수 있다.As described above, according to the cover opening and closing structure of the image forming apparatus according to the present invention, since the shock is not applied to the cover at the time when the cover is gradually opened and closed, damage to the product is prevented and noise is not generated. Product reliability can be improved.

Claims (4)

본체에 회동 가능하게 설치되는 커버와, 상기 커버를 상기 본체에 록킹시키는 록킹장치와, 상기 록킹장치를 해제시키는 해제장치와, 상기 커버를 오픈 방향으로 탄력 지지하는 탄성부재와, 상기 커버의 개폐를 원활하게 하는 댐핑수단을 포함하여 이루어진 것을 특징으로 하는 화상형성장치의 커버 개폐 구조.A cover rotatably mounted to the main body, a locking device for locking the cover to the main body, a release device for releasing the locking device, an elastic member for elastically supporting the cover in the open direction, opening and closing the cover Cover opening and closing structure of the image forming apparatus, comprising a damping means for smoothing. 제 1 항에 있어서, 상기 댐핑수단은 상기 커버에 회동 가능하게 설치되는 구름부재와, 상기 본체에 설치되며 상기 구름부재와 소정 압력으로 접촉되면서 상기 구름부재의 구름을 안내하는 안내부재를 포함하여 이루어진 것을 특징으로 하는 화상형성장치의 커버 개폐 구조.The method of claim 1, wherein the damping means comprises a rolling member rotatably installed on the cover, and a guide member which is installed on the main body and guides the cloud of the cloud member while being in contact with the cloud member at a predetermined pressure; Cover opening and closing structure of the image forming apparatus. 제 2 항에 있어서, 상기 안내부재는 힌지를 매개로 하여 소정 각도내에서 회동 가능하게 결합되며, 상기 안내부재의 후방에는 상기 안내부재를 탄력 지지하는 탄성부재가 설치되는 것을 특징으로 하는 화상형성장치의 커버 개폐구조.The image forming apparatus of claim 2, wherein the guide member is rotatably coupled within a predetermined angle via a hinge, and an elastic member is installed at the rear of the guide member to elastically support the guide member. Cover opening and closing structure. 제 3 항에 있어서, 상기 탄성부재의 일단은 상기 안내부재의 힌지의 하측에 연결되어 상기 커버가 오픈될수록 상기 안내부재와 상기 구름부재 사이의 마찰 저항을 크게하는 것을 특징으로 하는 화상형성장치의 커버 개폐 구조.The cover of an image forming apparatus according to claim 3, wherein one end of the elastic member is connected to a lower side of the hinge of the guide member so that the frictional resistance between the guide member and the rolling member increases as the cover is opened. Opening and closing structure.
KR2019990015852U 1999-08-04 1999-08-04 Structure for opening and shutting cover of image forming device KR200168094Y1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7343118B2 (en) 2004-12-02 2008-03-11 Samsung Electronics Co., Ltd. Door shock absorber and image forming apparatus employing the same
US7903997B2 (en) 2006-12-06 2011-03-08 Samsung Electronics Co., Ltd. Coupling apparatus and image forming apparatus employing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7343118B2 (en) 2004-12-02 2008-03-11 Samsung Electronics Co., Ltd. Door shock absorber and image forming apparatus employing the same
US7903997B2 (en) 2006-12-06 2011-03-08 Samsung Electronics Co., Ltd. Coupling apparatus and image forming apparatus employing the same

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