Developing device, process cartridge, and electrophotographic image forming apparatus

摘要

A developing device includes a developer storage chamber configured to store developer to be supplied to the development chamber, a partition configured to separate a development chamber and the developer storage chamber and having an opening allowing communication between the developer storage chamber and the development chamber, and a protruding portion configured to protrude toward the inside of the developer storage chamber from the partition on a downstream side of the opening in the rotation direction of a rotating shaft, and within one turn of rotation of the rotating shaft, a receiving member moves while contacting the protruding portion according to the rotation of the rotating shaft.

主权项

1. A developing device comprising:
a developer bearing member configured to bear developer; a development chamber including the developer bearing member; a developer storage chamber configured to store developer to be supplied to the development chamber; a partition configured to separate the development chamber and the developer storage chamber and having an opening that allows communication between the developer storage chamber and the development chamber; a rotating shaft configured to be rotatable and provided inside the developer storage chamber; a first sheet member attached to the rotating shaft; a second sheet member attached to the rotation shaft; and a plurality of protruding portions configured to protrude toward the inside of the developer storage chamber from the partition, wherein in a rotation radial direction of the rotating shaft, a length of the first sheet member is shorter than a length of the second sheet member, and the first sheet member contacts the plurality of protruding portions so that a space is formed between the first sheet member and a plane portion of the partition which forms the opening.