Developing device provided with developing roller and thickness regulating blade

摘要

The developing device includes a casing, a developing roller, a thickness regulating blade, and a seal member. The developing roller has an outer peripheral surface carrying developer. The thickness regulating blade is configured to regulate a thickness of the developer carried on the outer peripheral surface and has an opposed surface confronting the casing. The thickness regulating blade further has one end part supported on the casing and another end part provided with a press member in sliding contact with the outer peripheral surface. The press member is located on the opposed surface and protrudes toward the developing roller. The press member is formed with a receiving portion depressed inward at its widthwise ends in an axial direction of the developing roller. The seal member is disposed between the thickness regulating blade and the casing and contacting at least a part of the receiving portion.

主权项

1. A developing device comprising:
a casing accommodating developer therein; a developing roller provided in the casing, having an outer peripheral surface carrying the developer and configured to rotate in a rotational direction; a thickness regulating blade configured to regulate a thickness of the developer carried on the outer peripheral surface and having an opposed surface confronting the casing, the thickness regulating blade further having one end part supported on the casing and another end part provided with a press member in sliding contact with the outer peripheral surface, the press member being located on the opposed surface and protruding toward the developing roller, the press member being formed with a receiving portion depressed inward at its widthwise ends in an axial direction of the developing roller; and a seal member contacting at least a part of the receiving portion, wherein the receiving portion is configured to receive the seal number and has a contact surface, the contact surface being configured to contact with the seal member and extending in the axial direction of the developing roller, and wherein the seal member is disposed only in an upstream side of the contact surface in the rotational direction of the developing roller.