Developing cartridge

摘要

A developing cartridge includes: a developing roller that is rotatable about a developing roller axis line, which extends in a predetermined direction; a supply roller, which is rotatable about a supply roller axis line, which extends in the predetermined direction, and which supplies developer to the developing roller; a developing roller driving gear that is connected to the developing roller; a supply roller driving gear that is connected to the supply roller; and a driving force transmission gear, which is rotatable about a gear axis line extending in the predetermined direction, and which includes: a first gear part meshed with the developing roller driving gear; and a second gear part meshed with the supply roller driving gear. The driving force transmission gear transmits driving force to the developing roller driving gear and the supply roller driving gear.

主权项

1. A developing cartridge comprising:
a developing roller configured to rotate about a developing roller axis; a supply roller configured to rotate about a supply roller axis extending parallel to the developing roller axis, wherein the supply roller is configured to supply developer to the developing roller; a developing gear connected to and rotatable with the developing roller; a supply gear connected to and rotatable with the supply roller; and an input gear including:
a coupling member configured to receive driving force;a first gear being meshed with the developing gear, wherein the first gear has a first helical tooth pattern on a circumferential surface thereof, the first helical tooth pattern having tooth traces following first helix pitches, anda second gear being meshed with the supply gear, wherein the second gear has a second helical tooth pattern on a circumferential surface thereof, the second helical tooth pattern having tooth traces following second helix pitches in a direction opposite to a direction of the first helix pitches.