US 7,322,037 B2
Structure of optical disc cartridge
Bi Seok Choi, Seoul (Korea, Republic of)
Assigned to LG Electronics Inc., Seoul (Korea, Republic of)
Filed on Aug. 03, 2004, as Appl. No. 10/909,371.
Application 10/909371 is a continuation of application No. 09/405171, filed on Sep. 24, 1999, granted, now 6,785,900.
Claims priority of application No. 1999-2132 (KR), filed on Jan. 23, 1999.
Prior Publication US 2005/0010936 A1, Jan. 13, 2005
Int. Cl. G11B 23/03 (2006.01)
U.S. Cl. 720—733 8 Claims
OG exemplary drawing
 
1. A disc cartridge comprising:
a casing for receiving a disc therein;
a disc holder separably disposable in the casing, having tension arms for elastically holding the disc, and guiding the disc into or out of the casing; and
a protruding supporting member being provided within the casing and protruding to a predetermined height from an inner surface of the casing for contacting with and supporting a non-recording region of the disc, the height being equal to or greater than a value Hopt=G+D+A, wherein G is vertical deflection of the disc due to gravity, D is a vertical deflection of the tension arms, and A is a gap which must be minimally obtained between the disc and flanges of the tension arms wherein G is 0.2 mm, D is 0.05 mm, and A is 0.1+/−0.05 mm;
wherein the height of the protruding supporting member is sufficient to prevent any interference between the disc and tension arms.