IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0048814
(2005-02-03)
|
등록번호 |
US-7283769
(2007-10-16)
|
우선권정보 |
KR-10-2004-0006972(2004-02-03) |
발명자
/ 주소 |
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출원인 / 주소 |
- Samsung Electronics Co., Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
4 |
초록
▼
A driving apparatus of a detachable developing apparatus, and the detachable developing apparatus using the driving apparatus. The driving apparatus includes: a coupling member including a coupling drive which is connected to a driving element and to which driving power is transferred from the drivi
A driving apparatus of a detachable developing apparatus, and the detachable developing apparatus using the driving apparatus. The driving apparatus includes: a coupling member including a coupling drive which is connected to a driving element and to which driving power is transferred from the driving element, a coupling gear to which driving power is transferred from the coupling drive, and a coupling disc positioned between the coupling drive and the coupling gear for flexibly connecting the coupling drive and the coupling gear; and a power transferring portion including a plurality of gears to transfer driving power from the coupling member to the developing element and the toner supply element. At least one of the plurality of gears is a reduction gear for reducing a load applied to the coupling member from the developing element and the toner supply element.
대표청구항
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What is claimed is: 1. A driving apparatus of a detachable developing apparatus to transfer driving power of a driving element of the developing apparatus to a developing element, comprising: a shaft; a coupling member comprising: a coupling drive which is connected to the driving element and to wh
What is claimed is: 1. A driving apparatus of a detachable developing apparatus to transfer driving power of a driving element of the developing apparatus to a developing element, comprising: a shaft; a coupling member comprising: a coupling drive which is connected to the driving element and to which the driving power is transferred from the driving element, a coupling gear to which the driving power is transferred from the coupling drive, and a coupling disc positioned between the coupling drive and the coupling gear to flexibly connect the coupling drive and the coupling gear to each other, and correcting an eccentricity of the shaft between the driving element and the coupling gear; and a power transferring portion including a plurality of gears so as to transfer the driving power from the coupling member to the developing element, wherein at least one of the plurality of gears is a reduction gear to reduce a load applied to the coupling member from the developing element, and a speed reduction ratio between the developing element and the coupling member is greater than 1:1, a rotation speed of the coupling member is higher than a rotation speed of the developing element, and a torsional moment applied to the coupling member is smaller than a torsional moment applied to the developing element. 2. The driving apparatus of a detachable developing apparatus according to claim 1, further comprising four sliding slots formed at right angles with one another at an outer circumferential surface of the coupling disc. 3. The driving apparatus of a detachable developing apparatus according to claim 2, further comprising two pairs of sliding projections formed at respective surfaces of the coupling drive and the coupling gear which face the coupling disc to make an angle of 180째 with each other on the respective surfaces, wherein the pair of sliding projections of the coupling drive and the pair of sliding projections of the coupling gear are alternately inserted into the sliding slots of the coupling disc. 4. The driving apparatus of a detachable developing apparatus according to claim 3, wherein the sliding projections have a cylindrical shape. 5. The driving apparatus of a detachable developing apparatus according to claim 1, wherein the reduction gear includes a first gear meshed with the coupling gear, and a second gear integrally formed with the first gear, the first and second gears comprising respective sets of teeth, the first gear and the second gear have a common rotation shaft, and a number of teeth of the second gear is smaller than a number of teeth of the first gear. 6. The driving apparatus of a detachable developing apparatus according to claim 5, wherein the power transferring portion further includes idle gears which transfer the driving power to the developing element while meshing with the second gear and rotating. 7. The driving apparatus of a detachable developing apparatus according to claim 1, wherein the power transferring portion transfers the driving power of the driving element to a toner supply element of the developing apparatus. 8. A driving apparatus of a detachable developing apparatus to transfer driving power of a driving element of the developing apparatus to a developing element, comprising: a shaft; a coupling member comprising: a coupling drive which is connected to the driving element and to which the driving power is transferred from the driving element, a coupling gear to which the driving power is transferred from the coupling drive, and a coupling disc positioned between the coupling drive and the coupling gear to flexibly connect the coupling drive and the coupling gear to each other, and correcting an eccentricity of the shaft between the driving element and the coupling gear; a power transferring portion including a plurality of gears so as to transfer the driving power from the coupling member to the developing element, wherein at least one of the plurality of gears is a reduction gear to reduce a load applied to the coupling member from the developing element; and a series of gears connected from the coupling member to the developing element, wherein a speed reduction ratio of the series of gears is greater than 1.5:1. 9. A driving apparatus of a developing apparatus to transfer a driving power of a driving element of the developing apparatus to a developing element of the developing apparatus comprising a shaft, the driving apparatus comprising: a coupling member which is connected to the driving element and to which the driving power is transferred from the driving element, and correcting an eccentricity of the shaft between the driving element and the coupling member; and a power transferring portion including a plurality of gears so as to transfer the driving power from the coupling member to the developing element, wherein at least one of the plurality of gears is a reduction gear to reduce a load applied to the coupling member from the developing element, and a speed reduction ratio between the developing element and the coupling member is greater than 1:1, a rotation speed of the coupling member is higher than a rotation speed of the developing element, and a torsional moment applied to the coupling member is smaller than a torsional moment applied to the developing element. 10. A detachable developing apparatus, comprising: a shaft; a photosensitive unit, an electrostatic image being formed thereon by being exposed to a laser; a developing unit to form a toner image from the electrostatic image by supplying toner to the photosensitive unit; a driving unit to transfer a driving power supplied to the developing unit; a toner supply unit to supply the toner to the developing unit; a coupling member comprising: a coupling drive connected to the driving unit and to which the driving power is transferred from the driving unit, a coupling gear to which the driving power is transferred from the coupling drive, and a coupling disc positioned between the coupling drive and the coupling gear to flexibly connect the coupling drive and the coupling gear to each other, and to correct an eccentricity of the shaft between the driving unit and the coupling gear; and a power transferring unit comprising a plurality of gears to reduce the driving power from the coupling member to the developing unit, a speed reduction ratio between the developing unit and the coupling member being greater than 1:1, a rotation speed of the coupling member is higher than a rotation speed of the developing element, and a torsional moment applied to the coupling member is smaller than a torsional moment applied to the developing element. 11. A detachable developing apparatus comprising: a developer unit to develop an electrostatic image with a toner; a driving unit to transfer a driving power supplied to the developing unit; a coupling unit to receive the driving force, wherein the coupling unit comprises an Oldham's coupling mechanism; and a reduction gear to reduce the received driving force and transfer the reduced driving force to the developer unit, a speed reduction ratio between the developer unit and the coupling unit being greater than 1:1, a rotation speed of the coupling member is higher than a rotation speed of the developing element, and a torsional moment applied to the coupling member is smaller than a torsional moment applied to the developing element. 12. The developing apparatus of claim 11, further comprising a toner supply unit to supply the toner to the developer unit, wherein the reduced driving force is received by the toner supply unit. 13. The developing apparatus of claim 11, wherein the coupling unit comprises a disc having a plurality of slots at an outer circumferential surface thereof. 14. The developing apparatus of claim 13, wherein the coupling unit further comprises a drive to receive the driving force and comprising a projection inserted into one of the slots of the disc. 15. The developing apparatus of claim 13, wherein the coupling unit further comprises a gear to transfer the driving force to the developer unit and comprising a projection inserted into one of the slots of the disc. 16. The developing apparatus of claim 11, further comprising a driving gear to supply the driving force to the coupling unit, wherein the coupling unit corrects an eccentricity of the driving gear. 17. The developing apparatus of claim 16, wherein the coupling unit rotates with the driving gear. 18. A detachable developing apparatus comprising: a developer unit to develop an electrostatic image with a toner; a coupling unit to receive a driving force; and a reduction gear to reduce the received driving force and transfer the reduced driving force to the developer unit, wherein a speed reduction ratio of the reduction gear is 1.5:1 or greater.
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