Magnet roller, developer bearer, development device, process cartridge, and image forming apparatus

摘要

A magnet roller includes a roller-shaped body constructed of a magnetic field generating material, a first support rod provided to a first axial end of the body; and a second support rod provided to a second axial end of the body. At least one of the first and second support rods is constructed of a nonmagnetic material and includes a projecting part projecting outside the body from an end face of the body and a buried part united to the projecting part and positioned inside the body. The buried part includes a reduced-area portion smaller than a base end of the projecting part adjacent to the buried part in cross-sectional area perpendicular to an axial direction of the first and second support rods.

主权项

1. A magnet roller comprising:
a roller-shaped body constructed of a magnetic field generating material; a first support rod provided to a first axial end of the body; and a second support rod provided to a second axial end of the body, wherein at least one of the first and second support rods is constructed of a nonmagnetic material and includes a projecting part projecting outside the body from an end face of the body and a buried part united to the projecting part and positioned inside the body from the end face of the body, and the buried part includes a reduced-area portion smaller in cross-sectional area perpendicular to an axial direction of the first and second support rods than a corresponding cross-sectional area of a base end of the projecting part adjacent to the buried part, and the base end of the projecting part directly abuts an axial end surface of the body.