| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing device and an image forming apparatus, favorably sealing a developer. <P>SOLUTION: A partition wall 61 in a development housing 60 is provided in a position inside a bearing 80 along the outer peripheral surface of a rotating shaft 68 and at a space S from the rotating shaft 68. That is, a circular hole 61a formed by the tip of the partition wall 61 and concentric with the rotating shaft 68 has a diameter a little larger than the diameter of the rotating shaft 68, and the rotating shaft 68 penetrates the circular hole 61a. A cylindrical bar magnet 90 includes an N-pole and an S-pole disposed concentrically with the rotating shaft 68 in the direction of the rotating shaft, and buried in a position opposite to the tip of the partition wall 61 of the development housing 60 that is provided in the position inside the bearing 80. The bar magnet 90 attracts some of magnetic toner T stored in the development housing 60 to thereby form a magnetic brush of the magnetic toner T in a gap between the rotating shaft 68 and the tip face 61b of the partition wall 61. <P>COPYRIGHT: (C)2011,JPO&INPIT |
