| 摘要 |
PROBLEM TO BE SOLVED: To provide a gearbox which can enhance power transmission efficiency at lower cost than conventional gearboxes.SOLUTION: On an end surface 7 of an output rotating shaft 2 to which an output gear 4 meshing with an input gear 3 is mounted, a piezo-vibrator 8, an electrode 9, an insulating body 10 and a receiving coil 11 which is electrically connected to the electrode 9 are coaxially and sequentially stacked, and a transmitting coil 14 facing at least a portion of the receiving coil 11 is installed on the inner surface of a case 21. |
