Disk drive for cartridge disks

Claim 1

In a disk drive having a disk housing, receiving means in said disk housing for receiving a disk cartridge, drive means in said disk housing for engaging a disk enclosed in a cartridge housing of a disk cartridge received in said receiving means, said disk cartridge having a door on said cartridge housing moveable between an open position wherein a surface of said disk is exposed to a sensor in said disk housing to enable recording and/or reading of data recorded on said disk and a closed position wherein said disk surface is enclosed in said cartridge housing and not exposed to said sensor, and bias means carried by said cartridge housing biasing said door to its closed position, the improvement comprising: a recess on said door, said recess being laterally offset from the horizontal center of the cartridge housing so as to be oriented in the upper or lower portion of the door depending on the orientation of the cartridge housing; first and second arms pivotally mounted in said disk housing; a first actuator mounted to said first arm to engage said recess on said door of said disk cartridge when the disk cartridge is in a first orientation in the receivng means of the disk housing such that the recess is above the horizontal center of the cartridge housing; and a second actuator mounted to said second arm to engage said recess on said door of said disk cartridge when the disk cartridge is in a second orientation opposite said first orientation in the receiving means of the disk housing such that the recess is below the horizontal center of the cartridge housing; whereby upon insertion of a disk cartridge into said receiving means, one or the other of said first and second actuators engages said recess so that continued insertion movement of the cartridge housing forces pivotal movement of the arm whose actuator engages said recess causing said door to move from its closed to its open position against the bias of said bias means.