Electromagnetic actuator device and suspension device provided with same

An electromagnetic actuator device comprising:

• a magnet portion;
• and
• an armature that moves relative to the magnet portion, wherein the armature includes a plurality of teeth formed in a relative movement direction, a plurality of slots formed between the plurality of teeth, a yoke that connects the plurality of teeth, and a winding wound around the plurality of slots,
• wherein:
• the magnet portion includes a plurality of magnets that face the plurality of teeth via an air gap and are disposed in the relative movement direction, and
• a relationship between a minimum sectional area Sc1 of one tooth end portion of the armature and a minimum sectional area Sc2 of another tooth end portion is Sc1>Sc2, and a relationship between the minimum sectional area Sc2 of the other tooth end portion and a sectional area Sy of the yoke in a direction crossing the relative movement direction is Sc2≥Sy,
• the magnet portion is formed into a tubular portion, and
• the armature is disposed on a side of an inner circumference of the magnet portion formed into the tubular shape.

An electromagnetic actuator device comprising:

• a magnet portion;
• and
• an armature that moves relative to the magnet portion, wherein the armature includes a plurality of teeth formed in a relative movement direction, a plurality of slots formed between the plurality of teeth, a yoke that connects the plurality of teeth, and a winding wound around the plurality of slots,
• wherein:
• the magnet portion includes a plurality of magnets that face the plurality of teeth via an air gap and are disposed in the relative movement direction, and
• a relationship between a minimum sectional area Sc1 of one tooth end portion of the armature and a minimum sectional area Sc2 of another tooth end portion is Sc1>Sc2, and a relationship between the minimum sectional area Sc2 of the other tooth end portion and a sectional area Sy of the yoke in a direction crossing the relative movement direction is Sc2≥Sy, and
• a relationship between a dimension We of a surface of the other tooth end portion facing the magnets in the relative movement direction and a dimension Wm of surfaces of the magnets facing the other tooth end portion in the relative movement direction is Wc≠Wm.