| 摘要 |
PURPOSE:To reset an index cam, controlling the lead-in position of a tone arm, securely by a crank which drives a driving plate right before a slide base stops at the replacement position of a disk. CONSTITUTION:Through the clockwise turning of a rack gear 15, a slide base 9 having an installed turntable 44, etc., moves from a disk replacement position to a play position. Right before the base 9 stops at the play position, the outer periphery of a 30cm disk R on the turntable 44 comes into contact with a roller 34 fixed to an index cam 33, which is turned to control the play start position of a tone arm 5 corresponding to the 30cm disk. When a driving plate 28 is driven by a crank 43 successively, the projection 28c of the driving plate 28 pushes the projection 33a of the cam 33, which is turned to separate the roller 34 from the outer periphery of the record R. Consequently, the cam 33 is reset securely to eliminate the influence of the roller 34 upon the record R. |
