Kyocera Document Solutions Inc.

Uto Syu

Tamotsu Shimizu

Akihiro Watanabe

Yasuhiro Tauchi

Yuji Toyota

Ryo Yamada

A developing device includes a developing container, a first stirring conveyance member, a second stirring conveyance member, a developer carrying member including a developing sleeve and a magnet, and a regulation member. The regulation pole in the magnet has a region extending over 10° or more in which a maximum value of a vertical magnetic force is not more than 65 [mT] and a vertical magnetic force gradient is not more than 0.3 [mT/°]. A peak position of the vertical magnetic force gradient of the regulation pole is arranged at a position opposed to the second stirring conveyance member, and when a value of the vertical magnetic force gradient and a value of the vertical magnetic force at the peak position of the vertical magnetic force gradient are indicated as A [mT/°] and K [mT], respectively, A≥2.8 and A×K≥62.5 are satisfied.

Developing device including developer carrying member and containing two-component developer and image forming apparatus including the developing device

Growing community of inventors

Osaka, Japan

Uto Syu