| 摘要 |
[Object] To provide a piezoelectric micro-blower from which vibration of a vibrating plate does not easily leak to the outside and with which energy loss can be reduced. [Solving Means] A piezoelectric micro-blower includes an inner case 1 to which a peripheral portion of a vibrating plate 2 including a piezoelectric element 20 is fixed such that a blower chamber 3 is formed between the inner case and the vibrating plate and an outer case 5 that covers an outer periphery of the inner case with a predetermined gap therebetween. The inner case 1 is elastically retained in the outer case 5 with a plurality of connecting portions 4. A first opening 11 is formed in a top plate portion 10 of the inner case 1 that faces a central portion of the vibrating plate, and a second opening 53 is formed in a top plate portion 52 of the outer case 5 that faces the first opening. A central space 6 is formed between the top plate portions 10 and 52, and fluid introduced from the outside is guided to the central space through the gap between the inner and outer cases. The vibrating plate 2 is driven in a bending mode so that air is sucked into the central space 6 and is discharged through the second opening 53. The connecting portions 4 suppress leakage of vibration of the vibrating plate 2 from the inner case 1 to the outer case 5, thereby reducing energy loss. |
