Disk apparatus

A disk apparatus comprising:

• a stock section in which a plurality of disks are stored while being stacked in the axial direction thereof;
• a disk transfer mechanism for withdrawing a selected disk out of said stock section;
• a selection mechanism for changing the relative positions of said stock section and said disk transfer mechanism so that the selected disk and said disk transfer mechanism face each other;
• a rotating section for driving the disk withdrawn from said stock section;
• a common motor for supplying power to said selection mechanism and said disk transfer mechanism;
• a power transmission mechanism for selectively transmitting the power of said motor to said selection mechanism and to said disk transfer mechanism;
• a switching mechanism for switching between a first switching state in which the power of said motor is transmitted to said disk transfer mechanism and a second switching state in which the power of said motor is transmitted to said selection mechanism;
• and
• a lock member for locking said selection mechanism when said switching mechanism is placed in the first switching state and for unlocking said selection mechanism when said switching mechanism is switched from the first switching state to the second switching state,
• wherein said switching mechanism is switched between the first switching state and the second switching state by a moving force produced when said disk transfer mechanism moves between a transfer-force transmitting position for transmitting a transfer force to the disk and a transfer-force interrupting position spaced apart from the disk, and said lock member is moved between a position so as to lock said selection mechanism and a position so as to unlock said selection mechanism.