| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an operating device, which is quick in response time and has a large mechanical strength, by a method wherein the device is formed into a constitution, wherein a movable member consists of an electrically conductive material, operating means are connected with an AC voltage source and forces are generated by the interaction between an eddy current, which is induced in the movable member, and a magnetic field, which is generated by the operating means. SOLUTION: Coils 68 and 69 on the inside of a cylindrical body 42 are respectively wound on winding forms 70 and 71 and the winding forms 70 and 71 are mounted on a support rod 56 and are respectively arranged closely on the inner surfaces of end part plates 54 and 55. A tube 63 made of copper can be moved in the axial directions of the coils 68 and 69. When a voltage V1 and a voltage V2 are simultaneously applied to the coils 68 and 69, two forces in the opposite directions act on the tube 63 by the interaction between an eddy current, which is induced in the tube 63, and magnetic fields, generated by the coils 68 and 69, the center of the tube 63 is displaced by a distance X from the center position 32 and the tube 63 is positioned at a position 39, where the two forces become equal. Accordingly, the tube 63 can be positioned at an arbitrary position by controlling the voltages V1 and V2 .</p> |
