| 摘要 |
Oscillators (101a and 101b) are attached to a spring material (100) whose both ends (105a and 105b) are held, and piezoelectric elements (103a, 103b, and 106) are attached to the spring material or the oscillators. Assuming that an axis parallel to an axis connecting the both ends of the spring material is a Y-axis, an axis parallel to a plane including the Y-axis and the oscillators and orthogonal to the Y-axis is an X-axis, and an axis orthogonal to the Y-axis and the X-axis is a Z-axis, the oscillators are asymmetric with respect to a plane including the Y-axis and the Z-axis. Consequently, when acceleration is applied, torsional vibrations act on the spring material. When the torsional rigidity of the spring material is set to be low, the resonant frequency of the torsional vibrations can be reduced. Since the both ends of the spring material are held, the spring material is bent in a small amount. Therefore, it is possible to realize a downsized piezoelectric power generating mechanism with a low resonant frequency.
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