Patent ID: 8248731

Claim:
An electrical connecting structure for a piezoelectric element, the piezoelectric element being arranged between a base and head of an object, configured to minutely move the head in a sway direction when deformed with an applied voltage, and having a first end face and a second end face opposite to the first end face, the electrical connecting structure comprising: a terminal used to apply a voltage to the piezoelectric element; an electrode formed on the first end face of the piezoelectric element and facing the terminal; a through hole formed through the piezoelectric element from the electrode on the first end face to the second end face of the piezoelectric element; a conductive part formed by hardening a liquid conductive material extending from an inside of the through hole to the terminal, to join the electrode and terminal together and electrically connect the electrode and terminal to each other; and the through hole having openings on the first and second end faces of the piezoelectric element and a large diameter part formed between the openings so that a diameter of the opening on the second end face is larger than a diameter of the opening on the first end face through the large diameter part; and the conductive part extending from the large diameter part to the terminal and protruding out of only the opening on the first end face of the piezoelectric element.