Patent ID: 11900975
Assignee: NHK SPRING CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A head driving device which drives a head member, the device comprising:
first base portion and second base portion facing each other across an intervening space;
a first head supporting portion provided between the first base portion and the second base portion and supporting the head member;
a first beam extending from the first base portion to the first head supporting portion;
a first base side hinge portion connecting a base portion of the first beam to the first base portion;
a first head side hinge portion connecting a distal end of the first beam to the first head supporting portion;
a second beam provided on an opposite side of the first beam across the intervening first head supporting portion, and extending from the second base portion to the first head supporting portion;
a second base side hinge portion connecting a base portion of the second beam to the second base portion;
a second head side hinge portion connecting a distal end of the second beam to the first head supporting portion;
a first piezoelectric unit provided between the first base portion and the base portion of the first beam, and displacing the distal end of the first beam by deforming in a state where voltage is applied;
a second piezoelectric unit provided between the second base portion and the base portion of the second beam, and displacing the distal end of the second beam by deforming in a state where voltage is applied;
a second head supporting portion provided between the first base portion and the second base portion, and supporting the head member;
a third beam extending from the first base portion to the second head supporting portion;
a third base side hinge portion connecting a base portion of the third beam to the first base portion;
a third head side hinge portion connecting a distal end of the third beam to the second head supporting portion;
a fourth beam provided on an opposite side of the third beam across the intervening second head supporting portion, and extending from the second base portion to the second head supporting portion;
a fourth base side hinge portion connecting a base portion of the fourth beam to the second base portion;
a fourth head side hinge portion connecting a distal end of the fourth beam to the second head supporting portion;
a third piezoelectric unit provided between the first base portion and the base portion of the third beam, and displacing the distal end of the third beam by deforming in a state where voltage is applied; and
a fourth piezoelectric unit provided between the second base portion and the base portion of the fourth beam, and displacing the distal end of the fourth beam by deforming in a state where voltage is applied.