Chucking plate for disk cartridge, method for manufacturing the chucking plate, and disk cartridge

A chucking plate for a disk cartridge in which a disk is rotatably housed in a cartridge housing including an upper shell and a lower shell which are combined together, the chucking plate being attached to an inner surface of a central section of the upper shell with an attachment ring member therebetween such that the chucking plate faces a center hole in the disk, the chucking plate holding and rotating the disk while being magnetically chucked on a disk table included in a disk driving unit in the state in which the disk cartridge is loaded in a recording-reproducing apparatus,

• the chucking plate comprising a plate having a slidability film formed at one side thereof is used as a material of the chucking plate and the chucking plate is attached to the cartridge housing such that the side at which the slidability film is formed faces the disk.

A method for manufacturing a chucking plate for a disk cartridge in which a disk is rotatably housed in a cartridge housing including an upper shell and a lower shell which are combined together, the chucking plate being attached to an inner surface of a central section of the upper shell with an attachment ring member therebetween such that the chucking plate faces a center hole in the disk, the chucking plate holding and rotating the disk while being magnetically chucked on a disk table included in a disk driving unit in the state in which the disk cartridge is loaded in a recording-reproducing apparatus,

• the method comprising
• a plate having a slidability film formed at one side thereof is used, and
• the chucking plate is manufactured by subjecting the plate to a pressing step from a side at which the slidability film is not formed and to a washing step, and is attached to the cartridge housing such that the side at which the slidability film is formed faces the disk.

A disk cartridge comprising a disk that is rotatably housed in a cartridge housing including an upper shell and a lower shell which are combined together, the disk cartridge including a chucking plate attached to an inner surface of a central section of the upper shell with an attachment ring member therebetween such that the chucking plate faces a center hole in the disk, the chucking plate holding and rotating the disk while being magnetically chucked on a disk table included in a disk driving unit in the state in which the disk cartridge is loaded in a recording-reproducing apparatus,

• wherein the chucking plate is manufactured using a plate having a slidability film formed at one side thereof as a material by subjecting the plate to predetermined press processing from a side at which the slidability film is not formed, and is attached to the cartridge housing such that the side at which the slidability film is formed faces the disk.