Media cassette and media dispenser having the same

1. A media cassette comprising:

a casing for mounting on a mounting portion of a media dispenser, said casing having a stack space in which media are to be stacked;

a discharging slot formed in said casing for discharging the media, stacked in said stack space, out of said casing in an edgewise direction of the media; and

a slot shielding unit for opening said discharging slot when said casing is mounted on the mounting portion and for shielding said discharging slot when said casing is detached from the mounting portion, wherein said slot shielding unit is biased toward a direction which shields said discharging slot when said casing is removed from the mounting portion, and wherein said slot shielding unit is magnetically activated to open said discharging slot when said casing is mounted on the mounting portion, wherein said shielding unit includes at least one interacting member which moves through free space under an influence of a magnetic field to contact a magnet provided at the mounting portion, when said casing is mounted on the mounting portions;

wherein said shielding unit includes a rotary shaft, wherein said interacting member is attached to said rotary shaft and a shielding unit end portion is attached to said rotary shaft, and wherein when said interacting member is drawn toward the magnet of the mounting portion, said rotary shaft rotates so that said shielding unit end portion opens said discharging slot.

2. The media cassette of claim 1 , wherein a spring tends to rotate said rotary shaft so that said shielding unit is biased to a position shielding said discharging slot, when said casing is detached from the mounting portion.