公开(公告)号：US4901614A

公开(公告)日：1990-02-20

申请号：US105188

申请日：1987-10-05

Applicant: Shinji Kumano ,  Keisuke Watanabe ,  Susumu Ohi

Inventor： Shinji Kumano ,  Keisuke Watanabe ,  Susumu Ohi

IPC: G10H1/34

CPC classification number: G10H1/346 ,  Y10S84/07

Abstract: A keyboard apparatus of an electronic musical instrument includes keys, mass members, and springs. Each key can pivot about a first pivot fulcrum. Each mass member can pivot about a second pivot fulcrum. Each spring supplies a biasing force to at least the corresponding mass member so that the mass member returns to an initial state. In this apparatus, each key has a point of application for pivoting the corresponding mass member in the same direction as a pivoting direction of each key when each key is depressed.

Abstract translation: 电子乐器的键盘装置包括键，质量构件和弹簧。 每个键可围绕第一枢轴支点枢转。 每个质量构件可围绕第二枢轴支点枢转。 每个弹簧向至少相应的质量构件施加偏置力，使得质量构件返回到初始状态。 在该装置中，每个按键具有一个应用点，用于当每个按键被按压时，在与每个键的枢转方向相同的方向上枢转相应的质量构件。

公开(公告)号：US4668843A

公开(公告)日：1987-05-26

申请号：US828292

申请日：1986-02-11

Applicant: Keisuke Watanabe ,  Toshiyuki Iwamoto

Inventor： Keisuke Watanabe ,  Toshiyuki Iwamoto

IPC: G10H1/34 ,  H01H13/705 ,  G10H3/00

CPC classification number: G10H1/344 ,  H01H13/705 ,  G10H2220/281 ,  H01H2225/018 ,  H01H2229/068 ,  H01H2231/018 ,  Y10S84/07

Abstract: A keyboard switch apparatus for an electronic musical instrument has first and second switches each constituted by stationary and movable contacts. The stationary contacts of the first and second switches are formed adjacent to each other on a single board. The movable contacts of the first and second switches are mounted on a single flexible member arranged above the single board and are normally spaced apart from the stationary contacts at positions opposite thereto. The flexible member and the movable contacts of the first and second switches are integrally formed to have a uniform cross-sectional shape along one direction. The flexible member is deformed in response to the depression of a key. The stationary contacts corresponding to the movable contacts of the first and second switches are closed with a time difference according to a speed of key depression.

Abstract translation: 一种用于电子乐器的键盘开关装置，具有第一和第二开关，每个开关均由静止和可动触点构成。 第一和第二开关的固定触头在单个板上彼此相邻地形成。 第一和第二开关的可移动触头安装在布置在单板上方的单个柔性构件上，并且在与其相对的位置处通常与固定触点间隔开。 第一和第二开关的柔性构件和可动触头一体地形成为沿着一个方向具有均匀的横截面形状。 柔性构件响应于键的按压而变形。 与第一开关和第二开关的可动触点相对应的固定触点根据键按压的速度以时间差闭合。