公开(公告)号：US20230237982A1

公开(公告)日：2023-07-27

申请号：US18156553

申请日：2023-01-19

Applicant: YAMAHA CORPORATION

Inventor： Akito OHBA ,  Hirotsugu KAMIYA ,  Hiroyuki YAMANO

IPC: G10H1/34 ,  G10C3/12

CPC classification number: G10H1/346 ,  G10C3/12

Abstract: A keyboard unit includes a frame; a first member connected to the frame, a rigidity of the first member in a first direction being lower than a rigidity of the first member in a second direction intersecting with the first direction; and a mounted member. The mounted member includes a first pressing portion configured to suppress a movement of the first member in the first direction by pressing a part of the first member in the second direction, and a positioning portion configured to suppress a movement of the mounted member with respect to the frame in the first direction.

公开(公告)号：US20190378486A1

公开(公告)日：2019-12-12

申请号：US16550627

申请日：2019-08-26

Applicant: YAMAHA CORPORATION

Inventor： Hirotsugu KAMIYA ,  Shunsuke ICHIKI ,  Tsuyoshi SATO

IPC: G10H1/34 ,  G10C3/12

Abstract: A pivot mechanism includes: a shaft portion; a bearing configured to contact the shaft portion and pivot about a pivot axis; and a reinforcement protruding from an outer circumferential surface of the shaft portion. The outer circumferential surface includes a first region contactable by the bearing in a range of its pivotal movement and a second region not including the first region in a region opposed to the first region via the pivot axis. The reinforcement extends from at least a portion of the second region to an outside of the bearing in a pivot-axis direction.