Title:
DEVELOPING ROLLER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2021036305
Kind Code:
A
Abstract:
To provide a developing roller, a developing device, and an image forming apparatus that, even when bending of a magnet roller occurs, can prevent conduction failure due to the occurrence of a local change in contact resistance and prevent the influence on an image.SOLUTION: A developing roller 45 comprises: a magnet roller 5 that includes a roll part 12; a cylindrical sleeve 9; a flange part 10a as a first flange that is connected with one end of the sleeve; a flange part 10b as a second flange that is connected with the other end; a shaft member 8 as a conductive shaft that is connected with the second flange side of the magnet roller 5; a bearing 64a as a first bearing that rotatably supports the first flange with respect to the magnet roller 5; and a bearing group 64b as a plurality of second bearings that rotatably support the second flange with respect to the shaft member 8. The bearing groups 64b have conductivity and are arranged at different positions along the axial direction of the shaft member 8.SELECTED DRAWING: Figure 9
Inventors:
MURAKAWA JUNJI
KINOSHITA KEN
IKEDA HIDEAKI
KINOSHITA KEN
IKEDA HIDEAKI
Application Number:
JP2019158214A
Publication Date:
March 04, 2021
Filing Date:
August 30, 2019
Export Citation:
Assignee:
KONICA MINOLTA INC
International Classes:
G03G15/09; G03G15/08
Domestic Patent References:
| JPH0792806A | 1995-04-07 | |||
| JP2001215765A | 2001-08-10 | |||
| JPH02158767A | 1990-06-19 | |||
| JPH04212184A | 1992-08-03 |
Attorney, Agent or Firm:
Fukami patent office