Keyboard apparatus for an electronic musical instrument
US9040807B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2014 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Sep 29, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H1/346
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Reaction force generation members 21w, 21b are made of elastic body to be shaped like domes, respectively, so that the reaction force generation members 21w, 21b can be elastically deformed by depression exerted in directions of axis lines Yw, Yb, respectively, to increase their respective reaction forces from the beginning with the increasing amount of elastic deformation to buckle after respective peaks of the reaction forces to reduce the respective reaction forces. By varying the directions of the axis lines Yw, Yb of the reaction force generation members between a white key 11w and a black key 11b, the respective directions in which the reaction force generation members 21w, 21b are depressed at the peaks of the reaction forces are made close to the directions of the axis lines Yw, Yb of the reaction force generation members 21w, 21b, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.