| 摘要 |
A disc drive apparatus is composed of a disc carrying mechanism, a turntable ( 1 ), a pickup unit ( 2 ), a pickup transport mechanism, a reversible motor ( 7 ), a first transmission system ( 8 A), a second transmission system ( 8 B), and a transmission route changing mechanism. The pickup transport mechanism is further composed of a screw shaft ( 5 ) and a driven body ( 6 ) linking to the screw shaft ( 5 ) and the pickup unit ( 2 ). The driven body ( 6 ) moves reciprocally and linearly in a transport direction of the pickup unit ( 2 ) by reversible rotation of the reversible motor ( 7 ), and moves with being accompanied by the pickup unit ( 2 ) within a movable range (L) of the pickup unit ( 2 ), and moves independently out of the movable range (L). The transmission route changing mechanism conducts to change the transmission route linked to the reversible motor ( 7 ) from the first transmission system ( 8 A) over to the second transmission system ( 8 B) when the driven body ( 6 ) is moved independently out of the movable range (L) while the pickup unit ( 2 ) is stopped at one end of the movable range (L).
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