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    • 9. 发明授权
    • Development device, process cartridge, and image forming apparatus
    • 显影装置,处理盒和成像装置
    • US07974556B2
    • 2011-07-05
    • US12609603
    • 2009-10-30
    • Eisuke HoriHideki Kimura
    • Eisuke HoriHideki Kimura
    • G03G15/04
    • G03G15/0822G03G2215/0802
    • A development device includes a screw conveyer to convey powder contained in a development casing in a direction along a shaft of the screw conveyer, a bearing in which the screw conveyer is inserted, a cylindrical member provided around the screw conveyer and disposed between the screw conveyer and the bearing, the cylindrical member including a flange portion that projects from the cylindrical member toward an outside diameter of the shaft of the screw conveyer, and a powder pressure disperser to reduce pressure of the powder transported by the screw conveyer provided upstream from the flange portion in a direction in which the screw conveyer conveys the toner, the powder pressure disperser provided around and extending outward in directions perpendicular to the shaft of the screw conveyer and having an outer diameter larger than an outer diameter of the flange portion.
    • 显影装置包括:螺旋输送机,用于沿着螺旋输送机的轴的方向输送包含在显影壳体中的粉末;螺旋输送机插入的轴承;设置在螺旋输送机周围的圆柱形部件,并且设置在螺旋输送机 所述圆柱形构件包括从所述圆柱形构件朝向所述螺旋输送机的轴的外径突出的凸缘部分和粉末压力分散器,以减小由所述螺旋输送器输送的粉末的压力,所述螺旋输送器设置在所述凸缘的上游 所述螺旋输送机输送调色剂的方向上的部分,所述粉末压力分散器设置在所述螺旋输送机的轴的方向上并且向外延伸,并且具有大于所述凸缘部的外径的外径。