| 摘要 |
<p>PURPOSE:To prevent the generation of noise due to the poor contact between a slip ring and a brush by using a solar battery and a constant voltage circuit as the power source of an amplifying circuit in a main body. CONSTITUTION:A solar battery 1 is provided on the upper part of a rotor, a constant voltage circuit 4 using the solar battery 1 as the power source, amplifying circuits 5 and 6 to amplify the minute signals of magnetic heads 7 and 8 operated by the constant voltage circuit 4, and a primary coil 9a of a rotary transformer 9 are possessed, and a secondary coil 9b of the rotary transformer 9 is possessed fora stator. Further light source lamps 2 and 3 which emit light to the solar battery 1 are provided, and the output of the solar battery 1 is supplied through a constant voltage circuit 4 to the amplifying circuits 5 and 6. Thus since the slip ring and the brush are not used to supply the power source to the amplifying circuits 5 and 6, the noise generation due to the poor contact between the slip ring and the brush can be eliminated.</p> |
