A two point door latch device having a master latch assembly, an auxiliary latch assembly, a linkage operationally joining the master latch assembly and the auxiliary latch assembly, and a handle for operating the master latch assembly. At the time of starting the apparatus, the operation of a tray driver which pulls a loaded optical disk within the apparatus is conducted in parallel with the operation of a beam-expander driver which allows a movable lens of the beam-expander to move to a predetermined position in accordance with the kind of optical disk. A graph is materialized from the received sharing event data. Input shaft is connectable, via clutches, respectively to shafts. The apex and the side wall portions are different in stiffness.