| 摘要 |
PROBLEM TO BE SOLVED: To realize a linear motor which can provide a stable drive force and a smooth movement and which is small in size and easy to manufacture. SOLUTION: An expansion vibration and a standing wave are simultaneously generated by the laminated piezoelectric devices 54a of a piezoelectric transducer 54. The guide 52 in a linear guide is driven to moved by sliding protrusions 54b which protrude at positions corresponding to the peaks of the standing wave on the surface of the piezoelectric transducer 54 and which are made to form rotary motion traces. At that time, the piezoelectric transducer 54 is held by pressure plates 55 which are provided on both sides of the transducer 54 and which presses a support shaft 54c which is made to protrude from a position corresponding to the knot of the standing wave. The pressing plates 55 are supported by support members 57 fixed to an outer guide 51 so as to rotate freely and a biased force is applied to the pressing plates 55 by a common coil spring 60 as a pressing force. |
