CONTROL OF INNER PRESSURE IN DEVELOPING DEVICE AND RECOVERY OF SCATTERED DEVELOPER

To solve, even under a high-speed printing condition in which a developing roller rotates at a high speed, the problem that air in an upper space of a stirring and conveying member including a large amount of scattered developer flows out from a portion with low airtightness of a developing device due to an increase in inner pressure in the developing device and contaminates the inside of an image forming apparatus in which the developing device is disposed, and the developer scattered at that time adheres to a sheet and causes image density unevenness and image loss.SOLUTION: A developing device 20 is disclosed. The developing device 20 comprises a rectification member 81 that extends in a direction parallel to an axial direction of a developing roller 21. The rectification member 81 can include a developer collection part 81a that is arranged separated by a predetermined distance from a surface of the developing roller 21, and a rectification part 81b that guides air inside the developing device 20 to the developer collection part 81a toward the upstream side in the direction of rotation of the developing roller 21.SELECTED DRAWING: Figure 7 【課題】現像ローラが高速で回転する高速印字条件下にあっても、飛散現像剤を大量に含む攪拌搬送部材の上部空間内の空気が、現像装置の内圧上昇に起因して現像装置の気密性の低い部分から流出して、現像装置が配設された画像形成装置の内部を汚染し、その際に飛散した現像剤が用紙に付着して画像濃度ムラや画像欠損が生じる問題を解決する【解決手段】現像装置２０が開示される。該現像装置２０は、現像ローラ２１の軸線方向と平行な方向に延びる整流部材８１を備えている。該整流部材８１は、前記現像ローラ２０の表面から所定距離だけ隔置された現像剤捕集部８１ａと、現像装置２０内の空気を前記現像ローラ２０の回転方向の上流側に向かって前記現像剤捕集部８１ａに導く整流部８１ｂとを含むことが可能である。【選択図】図７