US 12,463,517 B2
Vibration actuator with elastic body with rectangualr frame body surrounding the plate and contact-type input device
Soichi Sato, Tokyo (JP); Yosuke Kinoshita, Tokyo (JP); Koichi Azumai, Tokyo (JP); and Koji Aita, Shizuoka (JP)
Assigned to MINEBEA MITSUMI Inc., Nagano (JP)
Appl. No. 18/860,800
Filed by MINEBEA MITSUMI Inc., Nagano (JP)
PCT Filed Apr. 28, 2023, PCT No. PCT/JP2023/016957
§ 371(c)(1), (2) Date Oct. 28, 2024,
PCT Pub. No. WO2023/210823, PCT Pub. Date Nov. 2, 2023.
Claims priority of application No. 2022-074823 (JP), filed on Apr. 28, 2022.
Prior Publication US 2025/0112534 A1, Apr. 3, 2025
Int. Cl. H02K 33/02 (2006.01)
CPC H02K 33/02 (2013.01) 18 Claims
OG exemplary drawing
 
1. A vibration actuator, comprising:
a plate that is a magnetic body;
an electromagnet in which a coil is disposed at a central portion of a core; and
an elastic body that is a frame body formed by arranging a plurality of L-shaped elastically deformable arm portions in a rectangular shape surrounding an outer periphery of the plate and is connected, while suspending the electromagnet from opposite sides of the frame body, to the plate with a pair of connection portions protruding inward from other opposite sides, wherein
one of the coil and the plate is displaced to approach the other and vibrates by a magnetic force generated by energization of the coil.