| 摘要 |
PURPOSE:To obtain a titled cylinder unit which is reduced in unit capacity and eliminated electromagnetic noise to be generated, by using an ultrasonic motor to turn a video head and providing the motor at the inside of the upper and lower cylinders. CONSTITUTION:The signal given from a video magnetic head 4 is transmitted to an upper rotary transformer 13 via a lower rotary transformer 14 and then fed to an electric circuit for recording and reproduction. The ultrasonic vibration is transmitted to a vibrating bar 7 from an oscillator 9 via a horn 8, and the vibration of the bar 7 is converted into the rotary motion of an upper cylinder 3 with a contact to the cylinder 3. A rotary shaft 1 is connected to the cylinder 3 and the transformer 14 and fixed by a bearing 2 containing a bearing 12 and a pressure control mechanism. The bearing 2 and the oscillator 9 are fixed to a lower cylinder 5, and the bearing 12 and the transformer 13 are fixed to an upper cover 11. The cover 11 is fixed to a side post 10, and the post 10 is fixed to a fixing stage 6. |
