Bearing member, end section member, photoreceptor drum unit, and method for manufacturing bearing member

摘要

A bearing member includes a concave section receiving a spherical body therein, and swing grooves into which end sections of a rotating force transmission pin are inserted. The swing groove at least includes a parallel part an axis and a curved part, 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 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.

主权项

1. An end section member comprising:
a shaft member; a bearing member to be disposed in an end section of a photoreceptor drum, wherein the shaft member includes a spherical body of which at least one part is spherical and a rotating force transmission pin provided to protrude from the spherical body, the shaft member is swingably installed in the bearing member, the bearing member comprising: a concave section in which one section is opened and a bottom section on a side opposite to the one section has a curved surface along the spherical body, the concave section configured to receive the spherical body therein; and at least two swing grooves 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 configured to be inserted, wherein each swing groove at least includes a parallel part which is parallel to an axis of the bearing member and a curved part curved toward the axis, wherein 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 wherein the shaft member is prevented from being removed from the bearing member as the rotating force transmission pin of the shaft member is hooked to the curved part of the swing grooves of the bearing member.