| 摘要 |
<p>PURPOSE:To enable a noncontact power supply to recording and reproducing amplifiers by rectifying an AC generated by a rotary coil opposite to a fixed generating magnet by means of a substrate that is the same as the rotary coil and giving it to a signal amplifier after stabilization. CONSTITUTION:When a stator coil of a motor which is not shown in the figure is electrified, rotating force is generated on a rotor, and a part surrounded by a broken line 77 in the figure is rotated in the direction of an arrow 78. The rotary coil 69 is rotated in opposition to the fixed generating magnet 67 to generated the AC on the rotary coil 69. This AC voltage is impressed upon a rectifier and power source regulator 79 on a printed board as shown by a broken line 70 to generate a stable DC voltage to be supplied as the power source for reproducing amplifier 31a and the recording amplifier 31b. By this method, the constitution for supplying power to the amplifiers can be completely free from a power supply method by rotary contact of a slip ring with an electrode and a brush.</p> |
