| 摘要 |
PURPOSE:To provide a driving device formed from a frictional anisotropic material in which the frictional coefficient between a driving member and a driven member is differed in positive and reversed vibrating directions of the driving member. CONSTITUTION:A driving member 12 consisting of a frictional anisotropic material is cut from a fiber-contained material in which a carbon fiber (f) is axially inclined, and electro polished to slightly expose the head part of the fiber (f) to the surface. The upper half of a driven member 13 makes frictional contact with the driving member 12, and the lower half is gently fitted to the driving member 12. When a sine wave alternate current is applied to a piezoelectric element 14, it is contractively and expansively displaced, and a driving shaft 11 fixed and connected thereto is also axially vibrated. In the arrowed directional (b) movement of the driving shaft 11, the arrowed directional (b) frictional resistance with the driven member 13 is small, and the arrowed directional (c) frictional resistance is large because the exposing direction of the fiber (f) in the driving member 12 is the arrowed direction (b), so that the driven member 13 is moved in an arrowed direction P together with the driving member 12, but in the arrowed directional (b) movement of the driving shaft 11, the driven member 13 is stayed in the position by the inertial force. |
