| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing device of non-contact development system with which uniformity of toner adhesion amount in an axial direction of a developing roller is attained, toner fusion to a layer thickness regulation blade is prevented, and stable developing property can be secured. <P>SOLUTION: A developing device 14 comprises: a developer tank 60 for storing toner; a developing roller 61 for carrying the toner stored in the developer tank 60 and conveying the toner to a photoreceptor 11; and a layer thickness regulation blade 64 which abuts on an outer peripheral surface of the developing roller 61 and regulates layer thickness of the toner. A first inclined groove 611 and a second inclined groove 612 which intersect with each other, each of which is inclined in a circumferential direction, and spirally continues are provided on the outer peripheral surface of the developing roller 61. Regarding the first inclined groove 611 and the second inclined groove 612, the ratio (P1/P2) of a groove interval P1 in a central part 610a of the developing roller 61 in an axial direction against a groove interval P2 in end parts 610b, 610c of the developing roller 61 in the axial direction is 0.2-0.75. <P>COPYRIGHT: (C)2012,JPO&INPIT |
