US 11,984,784 B2
Vibration motor with moving part and buffer material
Shinji Hatano, Nagano (JP)
Assigned to NIDEC SANKYO CORPORATION, Nagano (JP)
Filed by NIDEC SANKYO CORPORATION, Nagano (JP)
Filed on Apr. 25, 2022, as Appl. No. 17/727,819.
Claims priority of application No. 2021-076063 (JP), filed on Apr. 28, 2021.
Prior Publication US 2022/0352802 A1, Nov. 3, 2022
Int. Cl. H02K 33/02 (2006.01)
CPC H02K 33/02 (2013.01) 5 Claims
OG exemplary drawing
 
1. An actuator comprising:
a movable body;
a support body with a case to accommodate the movable body;
a connecting body that is connected to the movable body and the support body;
a magnetic drive circuit including a coil and a magnet that is opposed to the coil in a first direction and causing the movable body to vibrate in a second direction that intersects the first direction with respect to the support body; and
a buffer material fixed to one of the case and the movable body and is opposed to the other of the case and the movable body in the second direction,
wherein
when a drive voltage of the magnetic drive circuit is a first voltage capable of continuous drive, an amplitude in the second direction of the movable body is a first amplitude,
when the drive voltage of the magnetic drive circuit is a second voltage that causes the coil to burn out in the case of continuous drive, the amplitude in the second direction of the movable body is a second amplitude, and
a gap between the movable body and the buffer material is larger than the first amplitude and smaller than the second amplitude.