An optical disk apparatus comprising a control dial unit having a jog dial
and a shuttle dial which is concentrically mounted outside the jog dial is
provided to solve the problem that when operating the jog dial, the
shuttle dial in proximity of the jog dial is also rotated thereby
preventing its optical pickup to access to a precise target position to be
reproduced. The control dial of the invention is comprised of an outer
control dial and an inner control dial which has a smaller diameter than
the outer control dial and is arranged within a circumference of the outer
control dial, wherein a peripheral corner of an upper surface of the inner
control dial protrudes from an upper surface of the outer control dial,
and its distance of protrusion is larger than 2 mm and smaller than 90 mm.
