| 摘要 |
<p>PURPOSE:To automatically exchange a disk-like recording medium by inhibiting the count of pulses from a position sensor until the specific number of pulses from a sensor for the amount of action is obtained after a pulse signal from the position sensor is detected. CONSTITUTION:A pulling-out/putting-in mechanism 3 pulls out a disired recording medium 1 (1-1 to 1-n) from a magazine 2. A pulse signal HP indicating a storing position corresponding to the relative position of the mechanism 3 and the magazine 2 is outputted from a sensor S7. A motor 25 moves the magazine 2 and the mechanism 2 relatively by the rotation of an output shaft. A pulse signal POT is outputted from a sensor for the amount of action S8 corresponding to the rotation of the output shaft, and the amount of relative movement between the mechanism 3 and the magazine 2 is given with higher resolution than the position sensor S7. A control means 26 produces a signal DE controlling a player 5 from the signals HP and POT outputted from the sensors S7 and S8. The control means 26 counts the number of the HP and detects the relative position of the mechanism 3 and the magazine 2, then inhibits the count of the HP until the specific number of the BOT is obtained after the detection of the UP. By such a constitution, the medium is automatically exchanged.</p> |
