Linear tracking arm drive apparatus
AssigneeSony Corporation
InventorsNaoki Tanaka, Masatake Sasaki
Life of this patent
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Abstract
In a record disc player, a pick-up arm is mounted for movement to and fro along a rectilinear path, a drive assembly is actuable for driving the arm along such path, first and second motors are alternatively operated, and a drive speed change-over mechanism selectively transmits driving torque from the operated one of the first and second motors to the drive assembly so that the pick-up arm can be stably driven at a relatively low speed by operation of one of the motors during the playing or reproducing of signals from a record disc, and high speed movement of the pick-up arm is effected upon operation of the other motor during lead-in and return operations of the player.
Claims10
A record disc player comprising a pick-up arm;
- means mounting said arm for movement to and fro along a rectilinear path;
- drive means for driving said arm along said path;
- first and second alternatively operated motors;
- and drive speed change-over means for selectively transmitting driving torques from said first and second motors to said drive means, said drive speed change-over means including a rotatable sun gear operatively connected with said first motor, an internal gear coaxial with said sun gear and operatively connected with said drive means, rotatable planetary gears disposed between, and meshing with said sun gear and internal gear, and a rotary body coaxial with said sun gear and internal gear and rotatably carrying said planetary gears, said rotary body being operatively connected with said second motor.
Dependencies are inferred from the claim text.