| 主权项 |
1. A developing device comprising:
a frame configured to accommodate developing agent therein; a developing roller rotatable in a rotational direction about an axis defining an axial direction relative to the frame, the developing roller having a peripheral surface and an end portion in the axial direction; a first seal provided between the frame and the peripheral surface at the end portion of the developing roller, the first seal having an upstream end portion in the rotational direction; and a second seal extending in the axial direction and in contact with the peripheral surface, the second seal having an end region in the axial direction, the end region being positioned between the first seal and the peripheral surface at the end portion of the developing roller; wherein the frame comprises a seal placement portion at which the first seal is positioned, and a seal adhesion surface to which the second seal is adhered, the seal placement portion having a stepped portion connected to the seal adhesion surface and positioned farther from the developing roller than the seal adhesion surface to the developing roller in a direction perpendicular to the axial direction, the seal adhesion surface including a first surface and a second surface, the first surface being connected to the first seal in the axial direction and positioned inward of the first seal in the axial direction, and the second surface being positioned adjacent to and upstream of the upstream end portion of the first seal; and wherein the second seal has a first end portion and a second end portion, the first end portion being adhered to the seal adhesion surface and having an end part in the axial direction adhered onto the first seal, the second end portion being positioned opposite to the first end portion in the rotational direction and in contact with the peripheral surface of the developing roller, the first seal being compressed in the seal placement portion by the second seal to abut on the stepped portion. |
