公开(公告)号：US11900975B2

公开(公告)日：2024-02-13

申请号：US17986333

申请日：2022-11-14

Applicant: NHK SPRING CO., LTD.

Inventor： Masao Hanya ,  Ryo Kuwata

IPC: G11B5/48

CPC classification number: G11B5/4873 ,  G11B5/4833

Abstract: A head driving device includes a head supporting portion supporting a head member, a first beam, a second beam, a first piezoelectric unit including a pair of piezoelectric elements, and a second piezoelectric unit including a pair of piezoelectric elements. When voltage is applied to the piezoelectric elements of the first piezoelectric unit, the piezoelectric elements deform, and a distal end of the first beam moves. The piezoelectric elements of the second piezoelectric unit also deform by application of voltage, and moves a distal end of the second beam in a same direction as the distal end of the first beam.