US 12,334,792 B2
Vibration actuator and electric apparatus
Yuki Ogihara, Tokyo (JP); Shigeyuki Shimomura, Tokyo (JP); Chikara Sekiguchi, Tokyo (JP); and Yoshihiro Maeda, Tokyo (JP)
Assigned to Minebea Mitsumi Inc., Nagano (JP)
Filed by Yuki Ogihara, Tokyo (JP); Shigeyuki Shimomura, Tokyo (JP); Chikara Sekiguchi, Tokyo (JP); and Yoshihiro Maeda, Tokyo (JP)
Filed on Jun. 28, 2022, as Appl. No. 17/851,182.
Claims priority of application No. 2021-109258 (JP), filed on Jun. 30, 2021.
Prior Publication US 2023/0006525 A1, Jan. 5, 2023
Int. Cl. H02K 33/12 (2006.01)
CPC H02K 33/12 (2013.01) 10 Claims
OG exemplary drawing
 
1. A vibration actuator comprising:
a movable body including a magnet having a circular plate shape in which no through hole is provided, wherein a pair of annular yokes including an opening at a center and a pair of weight parts including a through hole that is contiguous with the opening in an axial direction are stacked on a front surface and a rear surface of the magnet in the axis direction, and another end portion of a connecting part that connects a corresponding elastic support part of a pair of elastic support parts on one end portion side is disposed to face each of the front surface and the rear surface of the magnet in the opening and the through hole that are contiguous with each other; and
a fixing body including a cylindrical part configured to house the movable body, wherein with the pair of elastic support parts, the movable body is supported so as to be allowed to vibrate back and forth in the axial direction, and a pair of annular coils disposed radially outside the movable body is provided,
wherein the movable body is vibrated in the axial direction through energization of the coil.