| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing device and an image forming apparatus in which a sufficiently charged developer may be conveyed while suppressing stress caused in the developer. <P>SOLUTION: A developing device 200 comprises a developing tank 201 and a developing roller 204, and an internal space of the developing tank 201 is partitioned by a partition wall 207 into a first conveyance path P, a second conveyance path Q, a first communication path R and a second communication path S. A first developer conveying part 202 for conveying a developer contained in the developing tank 201 in a conveyance direction X is provided in the first conveyance path P, and a second developer conveying part 203 for conveying the developer contained in the developing tank 201 in a conveyance direction Y is provided in the second conveyance path Q. The first developer conveying part 202 includes an inner spiral blade 202a, an outer spiral blade 202b, an upstream spiral blade 202c, a downstream spiral blade 202d, a rotary cylinder 202e, a supporting member 202f and a first gear 202g, and a supply port 205a is provided vertically above the outer spiral blade 202b. <P>COPYRIGHT: (C)2012,JPO&INPIT |
