Disk cartridge
AssigneeTDK Corporation
InventorsMasaru Ikebe, Kenji Hashizume
Life of this patent
Estimating the term…
Abstract
In a disc cartridge for an optical disc and the like, to increase stiffness in an opening for a record and reproduction mechanism. A disc cartridge 10 has an upper shell 12, a center frame 14, and a lower shell 16 clamped to one another. A center frame opening 20 and a lower shell opening 22 expose a recording surface of a recording medium contained between the center frame 14 and the upper shell 12 downwardly, and a reinforcing member 24 integrally couples the ends of the center frame opening 20, and a lower shell reinforcing member 26 integrally couples the ends of the lower shell opening 22.
Claims12
A disc cartridge comprising an upper shell, a center frame, and a lower shell superposed on and coupled to each other in a thickness direction, wherein
- a disc container space between said upper shell and said center frame rotatably contains a disc recording medium,
- a center frame opening and a lower shell opening for recording and/or reproducing are formed in the approximately same shape at overlapping positions of said center frame and said lower shell, respectively, to expose a part of a signal recording area of said contained disc recording medium across inner and outer peripheries in a disc radial direction and to the outside of said lower shell in a disc thickness direction, and
- a reinforcing member is integrally provided in said center frame to couple both sides of said center frame opening in an outer edge of said center frame opening, and in a position separate from a surface of said contained disc recording medium on a lower shell side to an upper shell side in the thickness direction.
A disc cartridge comprising an upper shell, a center frame, and a lower shell superposed on and coupled to each other in a thickness direction, wherein
- a disc container space between said upper shell and said center frame rotatably contains a disc recording medium,
- a center frame opening and a lower shell opening for recording and/or reproducing are formed in the approximately same shape at overlapping positions of said center frame and said lower shell, respectively, to expose a part of a signal recording area of said contained disc recording medium across inner and outer peripheries in a disc radial direction and to an outside of said lower shell in a disc thickness direction,
- an arc-shaped disc outer peripheral wall is erectly formed in a surface of said center frame on an upper shell side, and
- an erected end of the disc outer peripheral wall makes contact with an inner surface of said upper shell to form said disc container space.
A disc cartridge comprising an upper shell, a center frame, and a lower shell superposed on and coupled to each other in a thickness direction, wherein
- a disc container space between said upper shell and said center frame rotatably contains a disc recording medium,
- a center frame opening and a lower shell opening for recording and/or reproducing are formed in the approximately same shape at overlapping positions of said center frame and said lower shell, respectively, to expose a part of a signal recording area of said contained disc recording medium across inner and outer peripheries in a disc radial direction and to an outside of said lower shell in a disc thickness direction,
- an arc-shaped disc outer peripheral wall is erectly formed in a surface of said center frame on an upper shell side,
- said upper shell and said lower shell are clamped with making contact with each other at a position outside of said disc outer peripheral wall in the thickness direction, and
- the height of the arc-shaped disc outer peripheral wall is so designed that an end thereof is pressed against an inner surface of said upper shell by clamping force.
A disc cartridge comprising an upper shell, a center frame, and a lower shell superposed on and coupled to each other in a thickness direction, wherein
- a disc container space between said upper shell and said center frame rotatably contains a disc recording medium,
- a center frame opening and a lower shell opening for recording and/or reproducing are formed in the approximately same shape at overlapping positions of said center frame and said lower shell, respectively, to expose a part of a signal recording area of said contained disc recording medium across inner and outer peripheries in a disc radial direction and to an outside of said lower shell in a disc thickness direction,
- a width of said center frame opening in a disc rotational direction is larger than that of said lower shell opening, and
- both ends of the center frame opening in a width direction are disposed outside of both ends of the lower shell opening in the width direction.
A disc cartridge comprising an upper shell, a center frame, and a lower shell superposed on and coupled to each other in a thickness direction, wherein
- a disc container space between said upper shell and said center frame rotatably contains a disc recording medium,
- a center frame opening and a lower shell opening for recording and/or reproducing are formed in the approximately same shape at overlapping positions of said center frame and said lower shell, respectively, to expose a part of a signal recording area of said contained disc recording medium across inner and outer peripheries in a disc radial direction and to an outside of said lower shell in a disc thickness direction,
- at least an inner surface of said lower shell is made of material with low slide frictional resistance, and said upper shell is made of material having higher heat resistance and stiffness than material for the inner surface of said lower shell.
Dependencies are inferred from the claim text.