Patent ID: 9190234
Filing Date: 2015-11-17
Classification: H01F,H01H

Abstract:
1. An electromagnetic actuator comprising: a magnet core having a coil; a movable yoke; and an actuating shaft extending through the movable yoke and the magnet core, wherein: the magnet core of the electromagnetic actuator is rectangular, the movable yoke is a round yoke which corresponds to a magnetic circuit of the magnet core, the movable yoke has a first surface extending in a first direction and configured to contact a first surface of the magnet core extending in the first direction, a second surface extending in the first direction, and a third surface extending in a second direction orthogonal to the first direction between the first and second surfaces of the movable yoke, the actuating shaft extends in the second direction, the actuating shaft having a first end which extends beyond the second surface of the movable yoke and a second end which extends through a second surface of the magnet core extending in the first direction, the first surface of the magnet core being opposite to the second surface of the magnet core, the movable yoke is rotatable about the actuating shaft perpendicular to the second direction, a second yoke is arranged at the second end of the actuating shaft, the second yoke having first and second surfaces extending in the first direction, and a third surface extending in the second direction between the first and second surfaces of the movable yoke, and the first and second surfaces of the second yoke having a smaller length than the first and second surfaces of the movable yoke.