Video disk cartridge disk hub locking mechanism

A removable disk cartridge comprising:

• a housing comprising an inner surface and an opening;
• a plurality of fixed protuberances on the inner surface of the housing;
• a disk having a hub, the disk being rotatably disposed within the housing;
• a rotatable locking mechanism which is operatively coupled to a door, wherein the rotatable locking mechanism is deflected by the plurality of fixed protuberances to engage and clamp the hub of the disk against the inner surface of the housing when the door moves to the closed position;
• and
• a door assembly movable rotatable between an open position and a closed position, wherein the door assembly in the closed position covers the opening, and comprising a spoke and a door, the spoke pivotally coupled to the inner surface of the housing,
• wherein the spoke comprises openings which are aligned over the plurality of protuberances such that the door is not moved axially when the rotatable locking mechanism is deflected axially by the fixed protuberances.

A method comprising:

• closing a door assembly;
• contacting the door assembly with a fixed protuberance;
• resiliently deflecting a locking member against a hub of a disk;
• and
• urging the hub of the disk against an inner surface of a cartridge housing wherein the deflection of the locking member is caused directly by the closing of the door assembly.