DEVELOPING DEVICE, IMAGE FORMING APPARATUS

摘要

A developing device includes a developing roller, a housing, and a film member. A side opening provided in the housing communicates with a suction device at an end in a rotation axis direction of the developing roller. A downstream cover portion of the housing covers the developing roller from a downstream side in a rotation direction of the image carrying member. Concave portions of the downstream cover portion and a portion of a film member bonded to the downstream cover portion form ducts that communicate from openings facing the image carrying member to the side opening.

主权项

1. A developing device comprising:
a developing roller configured to rotate while facing a rotating photoconductor; a housing that is a mold member made of synthetic resin and covers the developing roller; and a film member, wherein the housing includes:
a side opening that is an opening provided at an end of the housing in a rotation axis direction of the developing roller and communicates with a suction device; anda downstream cover portion covering the developing roller from a downstream side in a rotation direction of the image carrying member, the downstream cover portion includes:
a plurality of facing openings that are openings formed at a plurality of locations along the rotation axis direction of the developing roller in an end surface of the downstream cover portion that faces the image carrying member; anda plurality of concave portions formed along a plurality of paths that extend from the plurality of facing openings to the side opening, the film member is bonded to a surface of the downstream cover portion to overlap the concave portions, and the concave portions of the downstream cover portion and a portion of the film member stretched over the concave portions form a plurality of ducts that communicate from the plurality of facing openings to the side opening and are separated from an inner space of the housing.