Konica Minolta, Inc.

Konica Minolta Business Technologies, Inc.

Junji Murakawa

Takeru Kinoshita

Hideji Hayashi

Hideaki Ikeda

A cleaning device includes: a brush-like rotation body that collects residual toner adhering to a photoreceptor from the photoreceptor and holds the residual toner; a collection member that is disposed so as to be in contact with the brush-like rotation body and collects the residual toner held by the brush-like rotation body from the brush-like rotation body; a blade member that scrapes off the residual toner collected by the collection member from the collection member; a conveyance member that is disposed below the brush-like rotation body and the collection member and conveys the residual toner scraped off from the collection member by the blade member; and a restriction part that is disposed above the conveyance member and restricts contact of the conveyance member with the brush-like rotation body and the collection member.

Cleaning device capable of preventing a conveyance member from contacting a brush-like rotation body and a collection member, drum unit, and image forming apparatus

A developing roller includes: a magnet roller including a roll part with a magnetic pole; a cylindrical sleeve that houses the magnet roller; a first flange connected to one end of the sleeve; a second flange connected to another end of the sleeve; a conductive shaft connected to a side of the second flange of the magnet roller; a first bearing that supports the first flange so that the first flange rotates relative to the magnet roller; and second bearings that support the second flange so that the second flange rotates relative to the conductive shaft. The second bearings are conductive, and are disposed at different positions along an axial direction of the conductive shaft.

Developing roller, developer, and image forming apparatus

An image forming apparatus comprises image forming sections for each color, each including a pressure receiving parts pair in a first outer region of a first rotary body and a second rotary body as an image carrier and a developing roller. A first image forming section includes a first pressure receiving part of the first rotary body and a second pressure receiving part of the second rotary body as the pressure receiving parts pair. A second image forming section includes a third pressure receiving part of the first rotary body and a fourth pressure receiving part of the second rotary body as the pressure receiving parts pair. A protruding distance of the first pressure receiving part is smaller than a protruding distance of the third pressure receiving part. A protruding distance of the second pressure receiving part is larger than a protruding distance of the fourth pressure receiving part.

Image forming apparatus, drum unit, and developing unit

In an imaging unit including a drum cartridge having an image carrier composed of a photosensitive drum and a development device having a development roller facing the image carrier, the development device developing an electrostatic latent image formed on the image carrier to form a toner image. The drum cartridge and the development device are provided so as to be allowed to be connected to and separated from each other. The drum cartridge and the development device, when connected to each other, can be made to pivot relative to each other on a shaft of the development roller of the development device.

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Toyokawa, Japan

Junji Murakawa