REPLENISHMENT MECHANISM, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS

To improve the performance to stop replenishment of toner from a replenishment path to a conveyance path.SOLUTION: A replenishment mechanism comprises: a rotating body that is arranged above a conveyance path through which a developer is conveyed and below a replenishment path for a toner, and rotates around an axis along a conveyance direction of the conveyance path while holding the developer; a passage that is provided along part of an outer periphery of the rotating body on the downstream with respect to the replenishment path in the direction of rotation of the rotating body, and through which the toner from the replenishment path is circulated to the conveyance path along the rotation direction; and a retention part that is provided in an area including the passage and extending outward in a radial direction of the rotating body from the passage, and causes the developer moving upward from the conveyance path to be retained therein.SELECTED DRAWING: Figure 4 【課題】補充路から搬送路へのトナーの補充を停止する性能を向上させる。【解決手段】補充機構は、現像剤が搬送される搬送路の上側且つトナーの補充路の下側に配置され、前記現像剤を保持しつつ前記搬送路の搬送方向に沿った軸線周りに回転する回転体と、前記回転体の回転方向において前記補充路に対する下流側に前記回転体の外周一部に沿って設けられ、該補充路からのトナーが前記回転方向に沿って前記搬送路へ流通する通路と、前記通路を含み且つ前記通路から前記回転体の径方向外側へ延び出た領域に設けられ、前記搬送路から上側へ移動した現像剤を滞留させる滞留部と、を備える。【選択図】図４