| 摘要 |
A bearing member (45), positioned at the end of a photoreceptor drum (35), for attaching a shaft member (70) that transmits torque. Said bearing member has a tubular body (46) and a retaining part (50, 150). Said retaining part is positioned inside the tubular body and is provided so as to be able to retain and release a torque-transmitting pin (95) provided on the shaft member. The retaining part is provided with the following: pivot grooves (51b, 55b), namely at least two grooves that extend in the direction of the axis of the tubular body and are provided so as to face each other; and entrance grooves (51a, 55a), one end of each of which connects to a pivot groove and the other end of each of which connects to the outside of said pivot groove. The retaining part is positioned such that, in an orientation in which the shaft member transmits torque, with the side of the bearing member from which the shaft member is inserted facing up, the entirety of each entrance groove is below some or all of the torque-transmitting pin. |
