US 12,285,781 B2
Oscillatory actuator
Yoshikazu Okazaki, Tokyo (JP); Tatsushi Sasanuma, Tokyo (JP); Takafumi Asukagawa, Tokyo (JP); Yusuke Chiba, Tokyo (JP); Hajime Goto, Tokyo (JP); Akira Hara, Tokyo (JP); and Ken Yamakami, Tokyo (JP)
Assigned to FOSTER ELECTRIC COMPANY, LIMITED, Tokyo (JP)
Appl. No. 18/035,756
Filed by FOSTER ELECTRIC COMPANY, LIMITED, Tokyo (JP)
PCT Filed Sep. 24, 2021, PCT No. PCT/JP2021/035064
§ 371(c)(1), (2) Date May 8, 2023,
PCT Pub. No. WO2022/102259, PCT Pub. Date May 19, 2022.
Claims priority of application No. 2020-187107 (JP), filed on Nov. 10, 2020.
Prior Publication US 2024/0009701 A1, Jan. 11, 2024
Int. Cl. B06B 1/04 (2006.01)
CPC B06B 1/045 (2013.01) 10 Claims
OG exemplary drawing
 
1. A vibration actuator comprising:
a casing with cylindrical shape;
a coil provided in the casing; and
a mover that vibrates along a vibration-axis direction of the casing,
wherein:
the mover includes a mover body and a weight fixed to the mover body,
a protrusion protruding toward an opening of the casing is provided at a central portion of the mover body,
a recess which is recessed toward the opening of the casing is provided at a central portion of the weight, and
the mover body and the weight are fixed in a state in which the protrusion is inserted into the recess.