Patent ID: 8185023
Filing Date: 2012-05-22
Classification: G03G,Y10S

Abstract:
1. A developing device for use with an image forming apparatus, comprising: a developing roller for carrying a developer; a developer chamber provided with said developing roller; a developer accommodating chamber for accommodating the developer, said developer accommodating chamber being provided at an upper part with an opening for supplying the developer into said developer chamber; a feeding member, provided in said developer accommodating chamber and having an elasticity, for feeding the developer by rotation thereof; a deformation portion provided in said developer accommodating chamber in contact with said feeding member at a position upstream of the opening with respect to a rotational direction of said feeding member, said deformation portion being capable of deforming said feeding member against the elasticity with rotation of said feeding member; and a restoration portion provided at a position downstream of said deformation portion and upstream of the opening with respect to the rotational direction of said feeding member, said restoration portion being capable of permitting said feeding member deformed by said deformation portion to be elatically restored by separating said feeding member from an internal surface of said developer accommodating chamber, and to cause the developer to jump toward the opening from said feeding member; wherein when viewed in a direction of an axis of said developing roller, a rotational center of said developing roller, and a rotational center of said feeding member are on the same side with respect to the vertical line passing through a boundary portion between said deformation portion and said restoration portion.