Patent ID: 9705390
Date: 2017-07-11
CPC Classifications: H02K

Claim:
1. An oscillating type actuator, comprising: a housing having a predetermined inner space; a shaft supported in the housing to be axially rotatable and has an output part to produce an output; a plate-shape oscillating arm that is fixedly supported to the shaft and has a swing surface perpendicular to the axis of the shaft, and makes a swing about the shaft in a swing direction which is identical to the swing surface; two permanent magnets arranged on the swing surface side by side along the swing direction of the oscillating arm and having pole faces different from each other; two magnet coils opposingly arranged to respectively face the pole faces of both sides of the permanent magnet with an air gap; and two pairs of interpoles made of magnetic material; wherein each pair of interpoles are arranged near a corresponding end point of the swing of the oscillating arm at an outer periphery of each magnet coil; and wherein each pair of interpoles are oriented in the direction of the axis of the shaft so that tip surfaces of the interpoles opposingly sandwich one of the permanent magnets arranged side by side on the swing surface with an air gap.