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US 7,925,193 B2Granted
Rotary member, developing device, and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsKouichi Oomori, Katsumasa Mikami, Katsumi Kumada, Yuichiro Suzuki, Minoru Toyoda, Yoshitaka Omori
Life of this patent
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Abstract
A rotary member includes a rotating main body, and support members that are formed to be supported by bearings. Each of the support members includes a spindle core formed of a first metal, and a cylindrical sheath that sheathes a portion of the spindle core where slidably contacting respective one of the bearings and that is formed of a second metal different from the first metal.
Claims17
A rotary member comprising:
- a rotating main body;
- and
- support members, which are attached to ends of the rotating main body, and are formed to be supported by bearings,
- wherein each of the support members comprises:
- a spindle core formed of a first metal;
- and
- a cylindrical sheath that sheathes a portion of the spindle core where slidably contacting respective one of the bearings and that is formed of a second metal different from the first metal, and
- wherein the cylindrical sheath includes an idling prevention portion contacting the spindle core and formed to prevent the cylindrical sheath from idling with respect to the spindle core, the idling prevention portion including an area in which the cylindrical sheath comprises a non-uniform inner diameter.
5 more elements
Dependencies are inferred from the claim text.