Drive device

摘要

To improve the reliability of an engagement and ejection mechanism of a drive device having an accommodating portion for accommodating therein a magnetic disk. A drive device with a cartridge engagement and ejection mechanism comprises: a cam having a sliding groove containing an engaging corner for locking a driving axis and an disengaging corner positioned adjacent to the engaging corner; a latching member having a latching portion to be engaged with a notch of a magnetic disk cartridge, and a driving shaft which slides within the sliding groove; and a resilient member for urging the latching member in the direction ejecting the magnetic disk cartridge, wherein the disengaging corner is selected to satisfy the relationship d<=r<=3 d, where "r" is a curvature of the disengaging corner and "d" is a radius of the driving shaft.