Title:
DETECTION DEVICE FOR KEY OPERATION OF KEYBOARD DEVICE, DETECTION METHOD FOR KEY OPERATION, AND KEYBOARD DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/100868
Kind Code:
A1
Abstract:
The present invention provides a detection device (101) for a key operation of a keyboard device, the detection device comprising: a key-side conductive part (20) provided on each of a plurality of keys (13); a substrate (15) provided to face the plurality of keys (13) in the pressing direction of the plurality of keys (13); at least two signal output parts (31, 32) that are provided on the substrate (15) so as to correspond to one key among the plurality of keys (13), each of the at least two signal output parts (31, 32) having a coil and outputting a signal corresponding to a distance from the conductive part (20) provided on the corresponding key (13); and a detection part (50) that, in a key-pressing stroke, detects a displacement in the yaw direction and/or roll direction of the corresponding key (13) on the basis of the signals outputted from the at least two signal output parts (31, 32).
Inventors:
NISHIDA KENICHI (JP)
HOTTA HARUMICHI (JP)
ISHII JUN (JP)
HOTTA HARUMICHI (JP)
ISHII JUN (JP)
Application Number:
PCT/JP2020/043484
Publication Date:
May 27, 2021
Filing Date:
November 20, 2020
Export Citation:
Assignee:
YAMAHA CORP (JP)
International Classes:
G10H1/34; G10B3/12
Domestic Patent References:
| WO2019122867A1 | 2019-06-27 |
Foreign References:
| JPH03163499A | 1991-07-15 | |||
| JPH0367299A | 1991-03-22 | |||
| JPH04109799U | 1992-09-22 | |||
| JPS517088Y1 | 1976-02-26 |
Attorney, Agent or Firm:
SHIN-EI PATENT FIRM, P.C. (JP)
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