| 摘要 |
<p>PURPOSE:To improve an assembling workability, to attain the miniaturization and to secure a stable signal even as the position detecting signal by simplifying the constitution for detecting the position of a magnetic head. CONSTITUTION:A part of magnetic pole of a magnet 5b constituting a motor 5 for rotating the magnetic head 9 together with the upper rotary drum 8 is led out to the outside from a hole 11 provided on a rotor case 5a and detected by a magnetic sensor 7 provided oppositely facing on the hole 11. Thus, the rotating position of the magnetic head 9 is detected.</p> |
