US 11,960,666 B2
Acoustic device
Kenji Sasaki, Yokohama (JP); Syusuke Fujiwara, Yokohama (JP); and Nao Takagi, Yokohama (JP)
Assigned to ALPHATHETA CORPORATION, Yokohama (JP)
Appl. No. 17/619,817
Filed by AlphaTheta Corporation, Yokohama (JP)
PCT Filed Jun. 19, 2019, PCT No. PCT/JP2019/024257
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2020/255289, PCT Pub. Date Dec. 24, 2020.
Prior Publication US 2022/0350424 A1, Nov. 3, 2022
Int. Cl. G06F 3/0362 (2013.01); G05G 1/10 (2006.01); G10H 1/32 (2006.01)
CPC G06F 3/0362 (2013.01) [G05G 1/10 (2013.01); G10H 1/32 (2013.01); G10H 2210/241 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An acoustic device comprising:
a rotary operator; and
a base supporting the rotary operator so that the rotary operator is rotatable,
the base comprising:
a braking unit configured to be brought into contact with the rotary operator to cause a braking force to act on the rotary operator; and
an adjuster configured to adjust the braking force caused by the braking unit,
the braking unit comprising:
a plurality of contact members configured to be brought into contact with the rotary operator to cause the braking force to act on the rotary operator; and
a movable body provided with the plurality of contact members and configured to move in directions toward and away from the rotary operator,
wherein
the adjuster moves the movable body in the directions toward and away from the rotary operator, and
the plurality of contact members are each independently biased toward the rotary operator, and the braking force acting on the rotary operator by the plurality of contact members varies depending on an adjustment amount by the adjuster.