Piezoelectric fan

Abstract

A piezoelectric fan in which vibration of blades is unaffected by external noise includes a vibrating plate including blades and a base. First piezoelectric elements are attached to a side of a first blade adjacent to the base. Second piezoelectric elements are attached to a side of a second blade adjacent to the base. Third piezoelectric elements are attached to a side of a third blade adjacent to the base. A holder includes a supporting body and a holding member that sandwich the base therebetween. The holding member has a supporting portion and main-body fixing portions including respective main-body fixing holes. The main-body fixing portions extend from the supporting portion.

1 . (canceled) 
     
     
         2 . A piezoelectric fan comprising:
 a vibrating plate including a base having a flat plate shape and a plurality of blades arranged along the base at predetermined intervals in the longitudinal direction of the base;   a piezoelectric element attached to the blade; and   a holding member having a flat plate shape and including a supporting portion and a main-body fixing portion, the supporting portion being configured to support the base; wherein   adjacent ones of the plurality of blades are driven to vibrate in opposite phases; and   the main-body fixing portion of the holding member extends from the supporting portion and is arranged in a region which is not overlapped with the base in a plan view.   
     
     
         3 . The piezoelectric fan according to  claim 2 , wherein the main-body fixing portion is positioned to a blade side compared with the base in the plan view of the vibrating plate. 
     
     
         4 . The piezoelectric fan according to  claim 2 , wherein the holding member is made of an insulating material. 
     
     
         5 . The piezoelectric fan according to  claim 2 , wherein the supporting portion has a shape that is identical or substantially identical to the base; and
 the main-body fixing portion is positioned between the plurality of blades.   
     
     
         6 . The piezoelectric fan according to  claim 2 , wherein the base and the plurality of blades are integrally configured and defined by a single unitary member. 
     
     
         7 . The piezoelectric fan according to  claim 2 , wherein a width of each of plurality of blades varies along a length thereof. 
     
     
         8 . The piezoelectric fan according to  claim 2 , wherein at least two piezoelectric elements are attached to opposite sides of each of the plurality of blades. 
     
     
         9 . The piezoelectric fan according to  claim 2 , wherein the base and the plurality of blades are integrally configured and defined by a single unitary member. 
     
     
         10 . The piezoelectric fan according to  claim 2 , wherein at least one piezoelectric element is attached to one side of each of the plurality of blades. 
     
     
         11 . A piezoelectric fan comprising:
 a vibrating plate including a base having a flat plate shape and including a plurality of blades connected to the base at predetermined intervals in the longitudinal direction of the base;   a piezoelectric element attached to the blade; and   a holding member having a flat plate shape and including a supporting portion having a shape that is identical or substantially identical to the base and a main-body fixing portion, the supporting portion being configured to support the base; wherein   adjacent ones of the plurality of blades are driven to vibrate in opposite phases; and   the main-body fixing portion of the holding member extends from an end surface positioned between the plurality of blades and in parallel or substantially in parallel to the longitudinal direction of the supporting portion.   
     
     
         12 . The piezoelectric fan according to  claim 11 , wherein the main-body fixing portion is positioned to a blade side compared with the base in the plan view of the vibrating plate. 
     
     
         13 . The piezoelectric fan according to  claim 11 , wherein the holding member is made of an insulating material. 
     
     
         14 . The piezoelectric fan according to  claim 11 , wherein the supporting portion has a shape that is identical or substantially identical to the base; and
 the main-body fixing portion is positioned between the plurality of blades.   
     
     
         15 . The piezoelectric fan according to  claim 11 , wherein the base and the plurality of blades are integrally configured and defined by a single unitary member. 
     
     
         16 . The piezoelectric fan according to  claim 11 , wherein a width of each of plurality of blades varies along a length thereof. 
     
     
         17 . The piezoelectric fan according to  claim 11 , wherein at least two piezoelectric elements are attached to opposite sides of each of the plurality of blades. 
     
     
         18 . The piezoelectric fan according to  claim 11 , wherein the base and the plurality of blades are integrally configured and defined by a single unitary member. 
     
     
         19 . The piezoelectric fan according to  claim 11 , wherein at least one piezoelectric element is attached to one side of each of the plurality of blades.