Patent ID: 8706006

Claim:
A developing device usable with a main body of an image forming apparatus, the developing device comprising: a photosensitive drum; a charging roller to rotate while contacting the photosensitive drum to charge a surface of the photosensitive drum to a uniform potential; and a separating member to rotate between a first position where the charging roller is separated from the photosensitive drum and a second position where the charging roller contacts the photosensitive drum, the separating member comprising: a body into which a rotary shaft of the charging roller is rotatably inserted; and a contact portion extending from the body and contacting the surface of the photosensitive drum when the separating member is located at the first position so as to separate the charging roller from the photosensitive drum, the contact portion including a friction member formed of rubber; a shaft supporting member to support the rotary shaft of the charging roller; an elastic member providing the shaft supporting member with a pressing force in a direction in which the charging roller contacts the photosensitive drum; and a stopper to restrict a contraction distance of the shaft supporting member in an opposite direction to the pressing force.