US 7,526,783 B2
Disk cartridge
Takashi Ohgi, Miyagi (Japan); Takahiro Yamada, Saitama (Japan); Kazuhito Kurita, Kanagawa (Japan); Tokio Kanada, Kanagawa (Japan); and Toru Morikawa, Kanagawa (Japan)
Assigned to Sony Corporation, Tokyo (Japan)
Appl. No. 10/541,456
PCT Filed Oct. 27, 2004, PCT No. PCT/JP2004/015944
§ 371(c)(1), (2), (4) Date Jul. 06, 2005,
PCT Pub. No. WO2005/052939, PCT Pub. Date Jun. 09, 2005.
Claims priority of application No. 2003-398150 (JP), filed on Nov. 27, 2003; application No. 2003-398151 (JP), filed on Nov. 27, 2003; and application No. 2003-398153 (JP), filed on Nov. 27, 2003.
Prior Publication US 2006/0075410 A1, Apr. 06, 2006
Int. Cl. G11B 33/02 (2006.01)
U.S. Cl. 720—743 17 Claims
OG exemplary drawing
 
1. A disk cartridge comprising:
a disk;
a cartridge body housing the disk to be rotatable and having formed therein a write and/or read opening through which a part of the disk is exposed to outside in a range between the inner and outer radii thereof;
a shutter member supported movably on the cartridge body to uncover and cover the write and/or read opening; and
a two-way forcing mechanism to force the shutter member toward any one of a direction to cover the write and/or read opening and a direction to uncover the write and/or read opening.