Title:
KEYBOARD DEVICE AND DETECTION METHOD FOR KEY DEPRESSION INFORMATION
Document Type and Number:
WIPO Patent Application WO/2024/047771
Kind Code:
A1
Abstract:
Detected parts 8 are provided to displacement members 7 that move in association with white keys 2a and hammers 6. The displacement members 7 can be formed to be smaller than the white keys 2a and the hammers 6, which makes it less likely for there to be error in the dimensions of each displacement member 7. In addition, the displacement members 7 are pivotally supported not on a chassis 4 but on a relatively smaller holder 10 that is attached to a board 9, which makes it less likely for there to be error in the attachment of each displacement member 7. Reducing such dimensional and attachment error makes it easier to achieve a designed value for the clearance between the detected part 8 and a coil 90 at each key 2. This makes it possible to accurately detect key depression information for each key 2.
Inventors:
TAKATA YUKIHIDE (JP)
UNO SHIRO (JP)
UNO SHIRO (JP)
Application Number:
PCT/JP2022/032673
Publication Date:
March 07, 2024
Filing Date:
August 30, 2022
Export Citation:
Assignee:
ROLAND CORP (JP)
International Classes:
G10H1/18
Domestic Patent References:
| WO2021100475A1 | 2021-05-27 |
Foreign References:
| JP2000099027A | 2000-04-07 | |||
| JPH0348295A | 1991-03-01 |
Attorney, Agent or Firm:
PATENT FIRM SHINMEI CENTURY (JP)
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