Patent ID: 8843005

Claim:
A developing device, comprising: a developing chamber; a toner carrier disposed in the developing chamber; a toner supply part to supply toner to the toner carrier; a toner amount detecting part to change a rotational position thereof according to an amount of the toner near the toner supply part to detect an amount of the toner remaining in the developing chamber; a toner flow restricting part to block movement of the toner around the toner amount detecting part which is caused by a flow of the toner in the developing chamber generated by rotation of the toner supply part and the toner carrier; and a limiting part to limit a thickness of a toner layer on a surface of the toner carrier, wherein the toner flow restricting part is disposed in a space between the limiting part and the toner amount detecting part and blocks a flow of the toner through a gap between a housing forming the developing chamber and the toner amount detecting part.