| 摘要 |
<p>A piezoelectric blower (100) is provided with an external case (17), a top plate (37), a side plate (38), an oscillating plate (39), a piezoelectric element (40), and a cap (42). The top plate (37), the side plate (38), and the oscillating plate (39) constitute a blower chamber (36). A through-hole (45) is provided in the top plate (37). A plurality of projections (138) projecting toward the center of the blower chamber (36) are formed on the inside surfaces of the side plates (38) constituting side surfaces of the blower chamber (36). When an alternating driving voltage is applied to the piezoelectric elements (40), the oscillating plate (39) oscillates by bending and the top plate (37) oscillates by bending in concert with the bending oscillation of the oscillating plate (39). Consequently, the volume of the blower chamber (36) changes in a cyclical manner.</p> |
