| 摘要 |
<p>With reference to Fig. 2, elongation of a piezoelectric element is enlarged by the lever arms (3a, 3b) by the principles of the lever and fulcrum. The thus enlarged elongation is further enlarged by a beam (6) by the principle of buckling. Clampers (9a, 9b) extending at an angle from an axis along which buckling of the beam (6) occurs open and close in accordance with the motion of the beam (6). When the clampers (9a, 9b) open or close, the elongation of the piezoelectric element (1) is further enlarged. Thus, the piezoelectric clamp device in accordance with the invention uses only one beam (6) in comparison with prior piezoelectric clamp devices using two beams. The use of only one beam (6) reduces a load to be exerted on the lever arms (3a, 3b) to thereby enlarge output elongation of the piezoelectric element (1). In addition, the pair of clampers (9a, 9b) have a function of enlarging the elongation of the piezoelectric element (1). <IMAGE></p> |
