| 摘要 |
<p>In a vibration wave driven apparatus, a vibration member of a closed loop shape having at least one set of parallel straight portions is provided on one of the straight portions with a projection group in which in the driving frequency of the vibration member, the vibration mode is the 1st-order mode of the fixed end-free end vibration and on the other straight portion with a projection group in which the vibration mode is the 2nd-order mode of the fixed end-free end vibration, whereby forces in the same direction which are not couples are generated in the both straight portions to thereby enable an object to be rectilinearly driven in a plane formed by the straight portions, thus preventing the irregularity of feeding speed and any partial wear caused by one-sided contact and enabling the drive force to be increased. <IMAGE></p> |
