A springing device including a moveable piece and an elastic object is
provided. The moveable piece is disposed between the aperture and the
tray and is able to swing. The first end of the moveable piece is
pivotally connected to the internal of the casing and the pivotal
connection is used as a supporting point of swinging, the second end of
the moveable piece is pivotally connected to the baffler. The elastic
object is connected to the moveable piece. When the tray is disposed
within the optical disc drive, the elastic object sustains the moveable
piece and the baffler, enabling the baffler to close the aperture. When
the tray moves towards the aperture until touching the moveable piece,
the moveable piece, which receives a force and swings, will apply a force
onto the elastic object and move the baffler to slide, enabling the
baffler to open the aperture.