Patent ID: 9109592
Filing Date: 2015-08-18
Classification: F04B,F04F

Abstract:
1. A piezoelectric micro-blower, comprising: a vibrating plate including a piezoelectric element; a case to which a peripheral portion of the vibrating plate is fixed, the case including an inner case and an outer case, a blower chamber being defined between the inner case and the vibrating plate; a first opening provided in a wall portion of the case, the wall portion of the case being arranged to face a central portion of the vibrating plate; and a plurality of connecting portions each extending from a periphery of a top plate portion of the inner case to the outer case and connecting the inner case to the outer case, the plurality of connecting portions being arranged to prevent transmission of vibration from the case to outside of the case; wherein the vibrating plate is driven in a bending mode by applying a voltage with a predetermined frequency to the piezoelectric element, such that compressible fluid is discharged from the first opening; and a sum of a length of each of the plurality of connecting portions is less than a sum of a length of each of a plurality of non-connecting portions provided between the plurality of connecting portions on the periphery of the top plate as viewed from above the case.