Title:
KEYBOARD INSTRUMENT AND METHOD FOR FORMING MAGNETIC SHIELD
Document Type and Number:
WIPO Patent Application WO/2024/075285
Kind Code:
A1
Abstract:
Magnetic shields 82a, 82b are formed from conductor patterns of a substrate 8. Hence, the magnetic shields 82a, 82b can be formed thin. Thus, even when a displacement member 7 (detection part 75) is displaced substantially in parallel with the substrate 8, key pressing information based on the increase/decrease of inductance of a coil 80 can be detected while suppressing interference of the magnetic shields 82a, 82b with the displacement of the displacement member 7. Also, even when the displacement member 7 (detection part 75) is displaced perpendicularly to the substrate 8, the key pressing information based on the increase/decrease of the inductance of the coil 80 can be detected. Thus, the degree of design freedom of a keyboard instrument 1 is increased. Further, constraints can be suppressed from being imposed on the arrangement of the substrate 8 by forming the magnetic shields 82a, 82b to be thin from the conductor patterns. This also increases the degree of design freedom of the keyboard instrument 1.
Inventors:
HISAMITSU HAJIME (JP)
SAKASHITA TOSHIHIKO (JP)
SAKASHITA TOSHIHIKO (JP)
Application Number:
PCT/JP2022/037663
Publication Date:
April 11, 2024
Filing Date:
October 07, 2022
Export Citation:
Assignee:
ROLAND CORP (JP)
International Classes:
G10H1/32
Domestic Patent References:
| WO2021100472A1 | 2021-05-27 |
Foreign References:
| JPS55115095A | 1980-09-04 | |||
| JPH0251397U | 1990-04-11 | |||
| JP2001067077A | 2001-03-16 |
Attorney, Agent or Firm:
PATENT FIRM SHINMEI CENTURY (JP)
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