A bearing mechanism for connection with a photosensitive drum and an electronic imaging device includes a transmission member for coupling a rotary driving member of the electronic imaging device, a conductive piece at an inner portion of the transmission member, a conductive bar, and a spring member. The transmission member is synchronously rotatably mounted to the photosensitive drum and includes a through hole. The conductive bar is slidably mounted into the through hoe of the transmission member for electrically contacting a conductive shaft of the electronic imaging device. The spring member is electrically connected between the conductive piece and the conductive bar for providing a rebound force forcing the conductive bar to move away from the inner portion of the transmission member. In this way, the axial offset between the transmission member and the rotary driving member can be compensated.