BEARING MEMBER, END SECTION MEMBER, PHOTORECEPTOR DRUM UNIT, AND METHOD FOR MANUFACTURING BEARING MEMBER

摘要

There are provided a concave section (51c) in which one section is opened and a bottom section (51b) on a side opposite to the one section has a curved surface along the spherical body, the concave section receiving the spherical body therein, and at least two swing grooves (52) being grooves which are provided on a side surface of the concave section and into which end sections of the rotating force transmission pin are inserted. The swing groove at least includes a parallel part which is parallel to an axis of the bearing member and a curved part (52a) curved toward the axis, an undercut section is not provided in the concave section when the concave section is viewed from an opened side of the concave section in a direction of the axis of the bearing member, and a clearance between the two swing grooves in a direction which is orthogonal to the direction of the axis on the opened side of the concave section is formed to be shorter than a distance between both ends of the rotating force transmission pin in the direction which is orthogonal to the axis of the bearing member even when the shaft member is mounted on the bearing member in a posture inclined at the most.