Developing device, process cartridge and image forming apparatus

摘要

A developing device includes a casing configured to accommodate developer, a developing roller, a seal member, at least portion of which is disposed between the developing roller and the casing, and which includes a fabric member including a plurality of first fibers extending in a first direction, and a heat radiation member configured to contact end surfaces of the first fibers of the seal member and radiate heat of the seal member.

主权项

1. A developing device comprising:
a casing configured to accommodate developer; a developing roller; a seal member, at least a portion of which is disposed between the developing roller and the casing, the seal member including a fabric member including a plurality of first fibers extending in a first direction that is perpendicular to an axial direction of the developing roller and parallel to a longitudinal direction of the seal member, the fabric member having a first surface facing the developing roller, and a second surface opposite to the first surface, the fabric member having cutouts at both sides of the first surface and the second surface while leaving a portion of the fabric member uncut; and a heat radiation member configured to contact end surfaces of the plurality of first fibers of the seal member and radiate heat of the seal member, the heat radiation member including protrusions engaging the cutouts such that the protrusions are in contact with the end surfaces of the plurality of first fibers, wherein each of the plurality of first fibers of the fabric member includes a circumferential surface that has a first heat radiation amount per unit area, and the end surfaces having a second heat radiation amount per unit area larger than the first heat radiation amount, wherein the end surfaces of the plurality of first fibers include a surface that intersects with the first direction, and wherein the developing roller contacts the circumferential surface of the first fibers.