| 摘要 |
PURPOSE:To enjoy selectively reproducing irregular sound recording contents by providing a missing part to a free gear so as to allow a position of a rotating phase to be deviated slightly due to shock and vibration by the reproduction of sound recording. CONSTITUTION:The free gear 1 carried by a rocking arm 8, when it is in the free state, is rotated irregularly by irregular vibration such as a reproduced sound received through the rocking arm 8. Thus, the position of the missing part 2 provided to the free gear 1 differs from each reproducing operation so as to make the timing different at each occasion when the gear touches the addendum of a meshed opposite gear in the gear transmission system causing an elongation to a cam member 7 due to torsion. Thus, the timing of lifting a sound conduction member 6 to restore a pickup P to the start point of reproduction while its stylus pressure is released or the retrogression of a record disc 3 differs from each reproduction.
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