A guide mechanism and the optical drive utilizing the same. The guide
mechanism includes a guiding base, a first axial fixing member, a driver,
and a rotary structure. The guiding base comprises a first opening and a
second opening. The first axial fixing member is disposed at a side of
the guiding base. The driver, disposed at an opposite side of the guiding
base, comprises an opening and a second axial fixing member. The rotary
structure is fixed between the first axial fixing member and the second
axial fixing member, comprising a spindle and a magnetic structure. The
spindle comprises an operating region and a connecting portion having a
maximum outer diameter smaller than a minimum outer diameter of the
operating region. The magnetic structure is attached to the connecting
portion and disposed in the opening.