| 摘要 |
PURPOSE:To provide an angular displacement driving device with a simple structure, which is excellent in productivity and maintenance by applying a voltage to a bimorph piezoelectric element which is wound, and by giving an anglular displcement to an object to be driven. CONSTITUTION:A bimorph piezoelectric element 1 is formed into like a belt shape and wound spirally. One end part 2 outward in the radial direction of said element 1 is fixed in a case 7 of a voltmeter. The other end part 3 inward in the radial direction of said element 1 is fixed on a rotary axis 4. The rotary axis 4 is supported with a bearing in the case angular displacable manner and on a number plate 10, an index pointer 9 is fixed. |
