Electric keyboard assembly and method of manufacturing weight members provided in keyboard assembly
US6995308B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2001 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Jun 10, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H1/346
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
There is provided an electric keyboard assembly having a construction which is capable of reducing a height of a keyboard and at the same time facilitating key scaling to key-touch response while maintaining the degree of freedom in designing the keyboard. A key is pivotally moved by a key depressing operation. A seesaw-type mass member having a front extension and a rear extension each extending from a pivot-receiving portion thereof, and a tone-generating position adjustment screw fitted in the front extension is pivotally moved about the pivot-receiving portion by a driving force generated by depression of the key and received via the tone-generating position adjustment screw. The front extension of the mass member pops up to a level higher than the key when the key is depressed. A front weight and a back weight are arranged separately in the front extension and in the rear extension, respectively. A distance between the pivot-receiving portion and the front weight arranged in the front extension is set to be shorter than the distance between the pivot-receiving portion and the back weight member arranged in the rear extension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.