公开(公告)号：US20180144773A1

公开(公告)日：2018-05-24

申请号：US15793719

申请日：2017-10-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoichi YAMAMOTO ,  Shinichi MAEDA ,  Norikatsu YOSHIDA ,  Shuji TABUCHI

IPC: G11B23/03 ,  G11B23/00

CPC classification number: G11B23/0323 ,  G11B17/225 ,  G11B23/0035 ,  G11B23/0316

Abstract: A disc tray includes a bottom wall including an outer periphery and an inner rib supporter supporting the lowermost disc from below. The bottom wall is thickened from the outer periphery toward the inner rib supporter. The lowermost disc includes a data recording area, an inner rib, and an outer rib. When the lowermost disc is stationary, the outer rib of the lowermost disc and the upper surface of the bottom wall are separated by a gap. When the lowermost disc is inclined in such a manner that part of the outer rib of the lowermost disc comes into contact with the upper surface of the bottom wall, the data recording area of the lowermost disc and the upper surface of the bottom wall are separated by a gap greater than thickness of the outer or inner rib.