Patent ID: 11936269
Assignee: APPLE INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 12:
13. An angular resonant actuator, comprising:
a housing;
a movable mass;
a pivot assembly attaching the movable mass to the housing, the pivot assembly defining a pivot axis, and the movable mass having a mass center offset from the pivot axis along a lever arm extending perpendicular to the pivot axis;
a spring configured to store and release energy received from movement of the movable mass, the spring preventing full rotation of the movable mass about the pivot axis; and
an electric actuator coupled to the movable mass and configured to start and brake the movement of the movable mass, the electric actuator including an electric coil attached to the movable mass, the electric coil having coil lead conductors that transition from on the movable mass to off the movable mass at one or more points on the movable mass, the one or more points on the movable mass located closer to the pivot axis than the mass center.