Patent ID: 9176429
Filing Date: 2015-11-03
Classification: G03G

Abstract:
1. A developing device, comprising; a housing with a pair of wall portions; a developing roller rotatably supported in the housing between the pair of wall portions and configured to carry developer; a developer supply path arranged along the developing roller and configured such that the developer is conveyed in a first direction and supplied to the developing roller; a developer conveyance path arranged along the developer supply path and configured such that the developer is conveyed in a second direction opposite to the first direction while being agitated; a pair of communication paths arranged at inner sides of the pair of wall portions and allowing communication between end parts of the developer conveyance path and end parts of the developer supply path; a supply-side conveying member including: an agitating-side conveying member including: at least one of the supply-side conveying member and the agitating-side conveying member being formed with projecting members, the projecting members including at least one of: first projecting members extending in the first direction along an outer wall portion of the first rib member from a first area where the supply-side spiral member and the first rib member intersect and projecting radially outward in the rotation of the supply-side conveying member; and second projection members extending in the second direction along an outer wall portion of the second rib member from a second area where the agitating-side spiral member and the second rib member intersect and projecting radially outward in the rotation of the agitating-side conveying member, wherein the hollow interior of the supply-side conveying member is formed between the pair of the supply-side shaft portions, the hollow interior of the agitating-side conveying member is formed between the pair of the agitating-side shaft portions, and the supply-side conveying member and the agitating-side conveying member have no other shaft part in each of the hollow interiors thereof.