Patent ID: 8761636

Claim:
An image forming device comprising: a developing device including: a developing roller configured to define an axis line extending in a first direction, the developing roller having a contact surface configured to contact with developer, the contact surface having a first end in the first direction and a second end opposite from the first end in the first direction; a developer accommodating chamber configured to be disposed below the developing roller and configured to accommodate developer therein; and a supply roller that is adjacent to the developing roller; a first pressing member including a first pressing surface configured to face upward; a first spring configured to be disposed below the first pressing member and configured to bias the first pressing member upward, the first spring configured to press the developing device upward via the first pressing surface of the first pressing member; a second pressing member including a second pressing surface configured to face upward; and a second spring configured to be disposed below the second pressing member and configured to bias the second pressing member upward, the second spring configured to press the developing device upward via the second pressing surface of the second pressing member, wherein the second end of the contact surface of the developing roller is configured to be disposed between: a first imaginary plane that is perpendicular to the axis line of the developing roller and passes through the first end of the contact surface of the developing roller, and a second imaginary plane that is perpendicular to the axis line of the developing roller and passes through the first pressing surface of the first pressing member, and wherein the first end of the contact surface of the developing roller is configured to be disposed between: a third imaginary plane that is perpendicular to the axis line of the developing roller and passes through the second end of the contact surface of the developing roller, and a fourth imaginary plane that is perpendicular to the axis line of the developing roller and passes through the second pressing surface of the second pressing member.