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.

公开(公告)号：US20220277713A1

公开(公告)日：2022-09-01

申请号：US17747120

申请日：2022-05-18

Applicant: YAMAHA CORPORATION

Inventor： Daisuke MIURA ,  Masahiro KAKISHITA ,  Kenichi NISHIDA ,  Shinichi ITO ,  Akihiro SUGISHIMA ,  Shinichi OHTA ,  Tsuyoshi SATO ,  Yasuhiko OBA ,  Jun ISHII

IPC: G10H1/00 ,  G10H1/34 ,  G10H1/44 ,  G10H1/053

Abstract: A sound production control apparatus has a position detector that detects, in accordance with a playing operation of a musical instrument, a position of a key displaceable within a movement range from a start position to an end position. The movement range includes a sounding range including a sounding position and a setting range that is closer to the start position than the sounding range. The apparatus causes a played sound associated with the key to be produced upon the detected position of the key reaching the sounding position, while controlling a characteristic of the played sound depending on a displacement characteristic of the key within the setting range before the key is positioned in the sounding range.