US 12,224,686 B2
Actuator
Tomoya Ishitani, Tokyo (JP); and Yuki Takahashi, Tokyo (JP)
Assigned to Minebea Mitsumi Inc., Nagano (JP)
Filed by Tomoya Ishitani, Tokyo (JP); and Yuki Takahashi, Tokyo (JP)
Filed on Jun. 29, 2023, as Appl. No. 18/215,837.
Application 18/215,837 is a continuation of application No. 17/065,518, filed on Oct. 8, 2020, granted, now 11,728,756.
Claims priority of application No. 2019-185840 (JP), filed on Oct. 9, 2019.
Prior Publication US 2023/0344376 A1, Oct. 26, 2023
Int. Cl. H02M 1/12 (2006.01); H02P 25/032 (2016.01)
CPC H02P 25/032 (2016.02) 5 Claims
OG exemplary drawing
 
1. An actuator comprising:
an actuator body that includes:
a base part having a flat plate shape;
a core assembly in which a coil is wound around a core, the core assembly being fixed to the base part;
a yoke having a flat plate shape to surround the coil and disposed to face the core assembly; and
an elastic part connecting between the core assembly and the base part such that the yoke is displaceable in a perpendicular direction perpendicular to a surface of the base part,
wherein the yoke is driven to one direction of the perpendicular direction by an attraction force caused by a magnetic force generated from energizing the coil so that the yoke vibrates in the perpendicular direction; and
a control device that includes:
circuitry configured to supply a main driving current pulse and a sub-driving current pulse to the coil, both of which are driving current pulses for driving an operation device in the one direction, in accordance with a touch operation of the operation device supported so as to be elastically vibrated, the main driving current pulse being capable of starting an elastic vibration, the sub-driving current pulse being capable of adjusting an attenuation period of the elastic vibration after the starting the elastic vibration, and polarities of the main driving current pulse and the sub-driving current pulse being all identical.