| 摘要 |
PURPOSE:To achieve reproduction of picture free from noise bar even at ultrahigh-speed reproduction, by fitting a rotating magnetic head at the tip of bimorph and supporting the base of the bimorph to a shaking body shaking in the action of electromagnetic force. CONSTITUTION:A rotating magnetic head device 1 consists of a lower fixed drum 2 and an upper rotating drum assembly 3, and a magnetic tape 4 runs in contact around the device 1. A rotating shaft 5 is supported rotatably with a bearing 6 and a base plate 7 is inserted and fixed to the shaft 6. The rotating drum assembly 3 consists of a rotating drum main body 8, a rotating yoke 9, and a plate spring 10. The rotating drum main body 8 is fitted to the rotary shaft 5 and screwed to the base plate 7. The center hole of the yoke 9 is freely fitted to the shaft 5 and the yoke is supported at the lower side of the main body 8 with a plate spring 10 and the rotating yoke 9 is rotated incorporatedly with the main body and seesaws around a shaft orthogonal to the shaft 5 together with the elastic deformation of the plate spring 10 through the action of an electromagnetic driving mechanism 11. |
