| 摘要 |
PURPOSE:To obtain a sufficiently large reduction gear ratio even when a main gear is sized small, by putting a pickup, etc., into operation through a two- stage reduction gear mechanism by the rotating force of a turntable. CONSTITUTION:When a starting rod 8 moves to left to press a friction link 6, a starting link 5 rotates counterclockwise around a shaft 7 and the main gear 4 starts rotating. When a rod driving gear 9 rotates, the main gear 4 is pressed up along an arcuate cam 9b to enage a continuous tooth part 4b with a pinion 3 and the main gear 4 rotates counterclockwise successively. When the rod driving gear 9 further rotates, an arcuate flange 9c is disengaged from a flange 4f simultaneously with a recessed part 4e engages the arcuate cam 9b, and the main gear 4 starts moving down and stops where a nontooth part faces the pinion 3. A driving rod 10 for a pickup arm, etc., moves to left and right according to the rotation of the rod driving gear 9 to operate the pickup arm, etc. |
