Patent ID: 8670699

Claim:
A developing device that is provided in an image forming device that holds developer and forms an image, comprising: an image carrier on which an electrostatic latent image is formed; a developer carrier that is configured to form a developer image on a surface of the image carrier by urging the developer on the electrostatic latent image; and a contact member that is configured to contact the developer carrier and that includes a bent part at a tip part thereof, the bent part contacting the developer carrier, wherein the contact member contacts the developer carrier and exerts a contact pressure per unit area thereon, the contact pressure per unit area being based on charging characteristics of the developer being used and a bent ratio of the bent part, the developing device comprises a plurality of developing devices, each of the plurality of developing devices contains one of at least two types of developers each having different charging characteristics, and a bent ratio of a first bent part of a first one of the developing devices that uses more easily charged developer is set smaller than a bent ratio of a second bent part of a second one of the developing devices that uses more difficultly charged developer.