Sony patents disc drive mechanism to center discs with fewer parts

1. An optical disc drive comprising: an insertion port configured to receive an optical disc; a spindle motor located behind and away from the insertion port; a mechanism configured to convey, to a position of the spindle motor, the optical disc when inserted through the insertion port; a frame including a stopper portion configured to come into contact with an outer edge of the optical disc when the optical disc is at the position of the spindle motor, wherein the stopper portion is configured to restrict backward movement of the optical disc; and a bias member including a contact portion located on a side opposite to the stopper portion and across the optical disc when the optical disc is positioned at the spindle motor, wherein the bias member is configured to use the contact portion to push the optical disc toward the stopper portion, and wherein: the bias member is rotatable around a first axis, the first axis is disposed on a first side of a first plane and on a back side of a second plane, the first plane extending along a front-back direction and through a rotational center axis of the spindle motor, the second plane extending along a lateral direction and through the rotational center axis of the spindle motor, the bias member has a first portion extending from the first axis and through the first plane, and a second portion extending from the first axis in a curved manner and through the second plane, the bias member comprises an arm having a plurality of contact portions comprising the contact portion, and the plurality of contact portions configured to engage the outer edge of the optical disc at separate locations.