| 摘要 |
PROBLEM TO BE SOLVED: To provide a development device capable of preventing deterioration of a developer while achieving thinning and uniformity of a developer layer, and to provide an image forming apparatus having the development device. SOLUTION: The development device 20 includes: a developer carrier 22 having a carrying surface 26 for carrying the developer and a first magnet 29, and receiving the developer from a developer storage part 11 on the carrying surface 26 while rotating in a predetermined direction, and supplying the developer to a predetermined image carrier 10; a magnetic member 30 forming a predetermined regulatory gap G with the carrying surface 26, and arranged opposite to the first magnet 29; and a second magnet 35 disposed more upstream than the magnetic member 30 when viewed from the rotating direction of the developer carrier 22, and having a magnetic pole of the same polarity as the first magnet 29, wherein magnetic force of the second magnet 35 is set higher than the magnetic force of the first magnet 29. COPYRIGHT: (C)2011,JPO&INPIT |
