| 摘要 |
<p>A developing device includes a rotatable toner bearing roller (510) and a regulation blade (560). The toner bearing roller (510) has regularly-arranged projecting sections (512) and non-projecting sections (513), bears toner whose volume average particle diameter is smaller than a depth (d) of the non-projecting section (513) relative to the projecting section (512), and develops a latent image borne on an image bearing member (20) with the toner borne on the toner bearing roller (510). The regulation blade (560) is for regulating an amount of the toner borne on the toner bearing roller (510), and abuts, with a predetermined width (560a), against a circumferential surface of the toner bearing roller (510) in a circumferential direction thereof in such a manner that a longitudinal direction of the regulation blade (560) is along a direction of a rotation axis of the toner bearing roller (510). A tip edge (560b) of the regulation blade (560) in a lateral direction and a thickness direction thereof is located within an abutting section having the predetermined width (560a). The predetermined width (560a) is larger than a maximum width (L4), in the circumferential direction, of the non-projecting section (513).</p> |
