Patent ID: 7531941

Claim:
A piezoelectric element comprising: a first non-extendible and non-contractible portion which neither extend nor contract, the first non-extendible and non-contractible portion being provided at one end of the piezoelectric element; an extendible and contractible portion which extends and contracts; a plurality of electrodes which are provided on a surface of the extendible and contractible portion and are provided so as to extend to a position where a surface of the first non-extendible and non-contractible portion lies; a plurality of connecting terminals which are connected to said plurality of electrodes and are provided in a position where the first non-extendible and non-contractible portion lies; and a flexible printed wiring substrate positioned to be adjacent to a back end surface of said first non-extendible and non-contractible portion, wherein said plurality of connecting terminals are connected to the flexible printed wiring substrate.