Title:
KEYBOARD DEVICE AND METHOD FOR DETECTING KEY PRESS INFORMATION
Document Type and Number:
WIPO Patent Application WO/2024/047773
Kind Code:
A1
Abstract:
A front surface 73 of a displacement member 7 is covered by a front surface portion 81 which is bent from a facing portion 80 of a part 8 to be detected. It is thus possible to ensure a large vertical width of the front surface portion 81 even when the thickness of the part 8 to be detected is thin. Since it is possible to disperse the concentration of lines of magnetic force by ensuring the large vertical width of the front surface portion 81, it is possible to reduce overshoot of a sensor output. That is, it is possible to reduce the overshoot of the sensor output without using a metal plate which has a large thickness such as that of a conventional one. Therefore, key press information can be accurately detected while also suppressing an increase in weight and an increase in cost of the keyboard device 1.
Inventors:
HISAMITSU HAJIME (JP)
SAKASHITA TOSHIHIKO (JP)
SAKASHITA TOSHIHIKO (JP)
Application Number:
PCT/JP2022/032676
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:
| JPS5417373Y1 | 1979-07-05 | |||
| JP2021081615A | 2021-05-27 | |||
| JPH0367299A | 1991-03-22 | |||
| JPH02293796A | 1990-12-04 | |||
| JPS5438199Y1 | 1979-11-14 |
Attorney, Agent or Firm:
PATENT FIRM SHINMEI CENTURY (JP)
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