| 摘要 |
A tone arm, designed for use with a semi- or fully automatic record player, is provided with an electromagnetic drive mechanism. The tone arm is supported by two separate shafts so as to be rotatable in both the horizontal and vertical directions. A bobbin, to which horizontal and vertical drive coils are circumferentially attached, is arranged coaxially with that shaft permitting horizontal movement. A permanent magnet is arranged facing the drive coils. Interaction between the permanent magnetic field and those generated by energization of the drive coils causes either a torque or a vertical force to be imparted to the bobbin and thus effect a corresponding movement of the tone arm.
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