IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0048393
(2013-10-08)
|
등록번호 |
US-9128456
(2015-09-08)
|
우선권정보 |
JP-2010-290305 (2010-12-27); JP-2010-290306 (2010-12-27) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Brother Kogyo Kabushiki Kaisha
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
A cam member has each of a plurality of first exposure-side surfaces provided in association with a first contact part of each exposure units and each of a plurality of second exposure-side surfaces provided in association with each first contact part. Each first contact part confronts but separates
A cam member has each of a plurality of first exposure-side surfaces provided in association with a first contact part of each exposure units and each of a plurality of second exposure-side surfaces provided in association with each first contact part. Each first contact part confronts but separates from the corresponding first exposure-side surface when the corresponding exposure unit is disposed in an adjacent position where the exposure unit is capable of exposing the corresponding photosensitive drum. Each first contact part is in contact with the corresponding second exposure-side surface when the corresponding exposure unit is disposed in a retracted position positioned farther than the adjacent position from the photosensitive drum.
대표청구항
▼
1. An image-forming apparatus comprising: a main casing formed with a first opening and a second opening, the second opening being formed separately from the first opening;a photosensitive drum having a rotation axis extending in an axial direction and configured to rotate about the rotation axis;a
1. An image-forming apparatus comprising: a main casing formed with a first opening and a second opening, the second opening being formed separately from the first opening;a photosensitive drum having a rotation axis extending in an axial direction and configured to rotate about the rotation axis;a moving member configured to move in a first direction from a mounted position in which the moving member is mounted in the main casing to a withdrawn position in which the moving member is withdrawn to an outside of the main casing, the first direction being perpendicular to the axial direction and parallel to a horizontal direction, the moving member being configured to support the photosensitive drum;a developing cartridge including a developing roller and configured to supply developer to the photosensitive drum;a first cover configured to pivotally move about a pivot shaft between a closed position covering the second opening and an open position exposing the second opening, the pivot shaft extending in the axial direction;a fixing device including a heating roller and a pressure roller; anda discharge roller configured to discharge a sheet of paper toward the first cover,wherein the developing cartridge is configured to be detachably mounted in the main casing through the second opening in a vertical direction,wherein the moving member is configured to move from the mounted position to the withdrawn position through the first opening while the developing cartridge remains mounted in the main casing, andwherein the discharge roller and the pressure roller define a first distance therebetween, the discharge roller and the pivot shaft defining a second distance therebetween, the first distance being greater than the second distance. 2. The image-forming apparatus according to claim 1, wherein the first opening is positioned downstream, in the first direction, of the moving member positioned in the mounted position. 3. The image-forming apparatus according to claim 2, further comprising a second cover configured to move between a closed position covering the first opening and an open position exposing the first opening, wherein the main casing has a wall portion, the first opening being separated from the second opening by the wall portion. 4. The image-forming apparatus according to claim 1, further comprising a belt unit including an endless belt configured to contact the photosensitive drum, the belt unit being configured to move together with the moving member. 5. The image-forming apparatus according to claim 1, wherein the main casing includes: a first guide configured to guide a movement of the developing cartridge when the developing cartridge is detached from and when the developing cartridge is mounted in the main casing; anda second guide configured to guide a movement of the moving member in the first direction. 6. An image-forming apparatus comprising: a main casing formed with a first opening and a second opening, the second opening being formed separately from the first opening;a plurality of photosensitive drums arranged to be juxtaposed with each other in a first direction parallel to a horizontal direction;a belt unit including an endless belt configured to contact the plurality of photosensitive drums, the belt unit being configured to move in the first direction from a mounted position in which the belt unit is mounted in the main casing to a withdrawn position in which the belt unit is withdrawn to an outside of the main casing, the belt unit being configured to move in a direction opposite to the first direction from the withdrawn position to the mounted position, the belt unit being configured to move between the mounted position and the withdrawn position through the first opening;a plurality of developer cartridges provided in one-to-one correspondence with the plurality of photosensitive drums, the plurality of developer cartridges being arranged in juxtaposition with each other in the first direction, each one of the plurality of developer cartridges being configured to accommodate developer to be supplied to a corresponding one of the plurality of photosensitive drums, each of the plurality of developer cartridges being configured to be mounted in the main casing through the second opening in a second direction parallel to a vertical direction and detached from the main casing through the second opening in a direction opposite to the second direction; anda plurality of exposure units provided in one-to-one correspondence with the plurality of photosensitive drums, the plurality of exposure units being arranged in juxtaposition with each other in the first direction, each one of the plurality of exposure units being disposed adjacent to each one of the plurality of developer cartridges in the first direction such that the plurality of exposure units and the plurality of developing cartridges are alternately aligned in the first direction,wherein each of the plurality of developer cartridges are mountable in and detachable from the main casing through the second opening in the second direction parallel to the vertical direction and in a direction opposite to the second direction, respectively, while the plurality of exposure units and the plurality of developing cartridges are alternately aligned in the first direction. 7. The image-forming apparatus according to claim 6, further comprising a first cover configured to move between a closed position for covering the first opening and an open position for exposing the first opening. 8. The image-forming apparatus according to claim 7, further comprising a second cover configured to move between a closed position for covering the second opening and an open position exposing the second opening. 9. The image-forming apparatus according to claim 8, wherein the plurality of exposure units is stationary when the second cover is moved from the closed position to the open position, the plurality of exposure unit remains mounted in the main casing when the second cover is in the open position. 10. The image-forming apparatus according to claim 8, wherein the second cover comprises a discharge tray. 11. The image-forming apparatus according to claim 6, further comprising a moving member configured to support the plurality of photosensitive drums and the belt unit, the moving member being configured to move in the first direction from the mounted position to the withdrawn position and to move in the direction opposite to the first direction from the withdrawn position to the mounted position, the moving member being configured to move between the mounted position and the withdrawn position through the first opening. 12. The image-forming apparatus according to claim 11, wherein the moving member comprises a cleaning unit including a cleaning member configured to contact an outer surface of the endless belt to clean the endless belt, the cleaning unit being disposed at a side that is a side at which the plurality of photosensitive drums are provided with respect to the endless belt, and wherein the cleaning unit has a dimension in a direction perpendicular to the outer surface of the endless belt, the dimension of the cleaning unit being smaller than a diameter of each of the plurality of photosensitive drums. 13. The image-forming apparatus according to claim 11, wherein the endless belt is configured to convey a sheet of paper in the direction opposite to the first direction to bring the sheet of paper into contact with the plurality of photosensitive drums, wherein the plurality of photosensitive drums is juxtaposed with gaps between neighboring photosensitive drums, the plurality of photosensitive drums including a first photosensitive drum positioned most downstream in the first direction and a second photosensitive drum next to the first photosensitive drum, a first gap between the first photosensitive drum and the second photosensitive drum being longer than any one of remaining gaps, andwherein the moving member includes a paper dust removing member configured to remove paper dust and disposed in confrontation with the first photosensitive drum. 14. The image-forming apparatus according to claim 6, further comprising a cleaning member, wherein the belt unit further includes a pair of rollers arranged in parallel to each other and spaced apart from each other in the first direction, the endless belt being looped around the pair of rollers such that the endless belt is circularly movable upon rotation of the pair of rollers, the endless belt configured to contact each of the plurality of photosensitive drums in a contact direction and having one side portion and another side portion opposite to the one side portion in the contact direction,wherein the plurality of photosensitive drums is configured to contact an outer surface of the one side portion of the endless belt, and the cleaning member is configured to contact an outer surface of the other side portion of the endless belt to clean the endless belt,wherein the pair of rollers includes one roller and another roller, the one roller being disposed on a downstream side of the other roller in the first direction and having a diameter larger than that of the other roller, andwherein the other side portion of the endless belt has an upstream end and a downstream end in the first direction and slopes gradually closer to the one side portion from the downstream end to the upstream end. 15. The image-forming apparatus according to claim 6, wherein the main casing has a pair of inner walls spaced apart from each other in a third direction orthogonal to the first direction and the second direction, each of the pair of inner walls having a plurality of guide parts, each of the plurality of guide parts being in a form of a groove-like recess and configured to guide one of the plurality of developer cartridges toward corresponding one of the plurality of photosensitive drums. 16. The image-forming apparatus according to claim 15, each of the plurality of guide parts includes: a first portion extending in the second direction; anda second portion positioned upstream of the first portion in the second direction, the second portion having a dimension in the first direction greater than that of the first portion. 17. The image-forming apparatus according to claim 16, wherein the dimension of the second portion is gradually decreased toward a downstream side thereof in the second direction. 18. The image-forming apparatus according to claim 6, wherein each of the plurality of developer cartridges includes a developing roller. 19. The image-forming apparatus according to claim 6, wherein the endless belt is an intermediate transfer belt.
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