US 6,307,831 B1Granted

Disc cartridge having reference holes

AssigneeTDK Corporation

InventorsYukio Miyazaki, Masaru Ikebe, Masatoshi Okamura

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Abstract

A disc cartridge of a three-piece structure capable of being kept from being caught in an information recording/reproducing apparatus during loading/unloading thereof with respect to the apparatus. The disc cartridge includes an upper plate, a lower plate, and a center frame arranged between the upper plate and the lower plate, which are joined to each other to form a casing in which a disc-like medium is received. The upper plate defines the whole upper surface region of the disc cartridge, whereas the lower plate defines the whole lower surface region of the disc cartridge. The disc cartridge also includes an engaged structure in which an engagement structure of the information recording/reproducing apparatus is engagedly fitted. The engaged structure is constituted by only the lower plate.

Claims9

Dependent claims

A disc cartridge comprising:

an upper plate, a lower plate, a center frame arranged between said upper plate and said lower plate which are joined to each other to form a casing in which a disc-like medium is received;
said upper plate defining the whole upper surface region of the disc cartridge and said lower plate defining the whole lower surface region of the disc cartridge;
and
an engaged structure in which an engagement structure of an information recording/reproducing apparatus is engagedly fitted;
said engaged structure being constituted by only said lower plate;
wherein said engaged structure includes reference holes in each of which a respective pin of the information recording/reproducing apparatus is engagedly fitted;
and
said center frame is formed at portions thereof corresponding to said reference holes with relief holes each having a size greater than a corresponding one of said reference holes.

5 more elements

Dependencies are inferred from the claim text.