显影单元和图像形成设备

Developing unit and image forming apparatus

Abstract

A developing unit including a retainer receiving portion for receiving a developer retainer, a first agitation portion adjacent to the retainer receiving portion, a second agitation portion adjacent to the first agitation portion, a first conveyance member received in the first agitation portion, a second conveyance member received in the second agitation portion, a layer thickness limiting member made of a magnetic material and disposed between the second conveyance member and the developer retainer to limit the layer thickness of a developer retained on the surface of a retaining member, and a blocking portion disposed on the upstream side of the layer thickness limiting member in the rotation direction of the retaining member and in a space located between the layer thickness limiting member and the second agitation portion to block a developer on the upstream side of the layer thickness limiting member from entering the space.
本发明提供了一种显影单元,包括:保持体收容部分,其用于收容显影剂保持体;第一搅拌部分,其与所述保持体收容部分相邻;第二搅拌部分,其与所述第一搅拌部分相邻;第一传送部件,其被收容在所述第一搅拌部分中;第二传送部件,其被收容在所述第二搅拌部分中;层厚限制部件,其由磁性材料制成并设置在所述第二传送部件和所述显影剂保持体之间,以限制保持在所述保持部件表面上的显影剂的层厚;以及阻挡部分,其设置于所述层厚限制部件的在所述保持部件的旋转方向上的上游侧,并处于所述层厚限制部件和所述第二搅拌部分之间的空间中,以阻止所述层厚限制部件的上游侧的显影剂进入所述空间。

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