Patent ID: 9529298
Filing Date: 2016-12-27
CPC Classification: G03G

Claim Text:
1. A developing cartridge comprising: a developing roller that develops an electrostatic latent image that is formed on an image bearing member; a developer regulating member that regulates a thickness of developer carried on the developing roller; and a frame that rotatably supports the developing roller and supports the developer regulating member, wherein the frame has a developing roller support section that rotatably supports an outer peripheral surface of at least one end of the developing roller, wherein the developing roller support section has a clearance at a position that, when viewed in an axial direction of the developing roller, overlaps a contact region at which the developing roller is in contact with the image bearing member, and wherein a lubricant is interposed between the developing roller and the developing roller support section, and the developing roller support section has a lubricant introduction section in which a clearance that becomes gradually narrower, in a rotation direction of the developing roller, as approaching a contact section with the outer peripheral surface of the developing roller, is formed between the developing roller support section and the outer peripheral surface of the developing roller, the lubricant introduction section being provided upstream of the contact section in the rotation direction.