Patent ID: 11909273
Assignee: NIDEC SANKYO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. An actuator comprising:
a support body comprising a coil and a coil holder which holds the coil;
a movable body comprising a magnet facing the coil and a yoke to which the magnet is fixed;
a connection body which relatively movably connects the movable body with the support body; and
a magnetic drive mechanism comprising the coil and the magnet to move the support body and the movable body relatively;
wherein in a case that a direction where the coil and the magnet face each other is defined as a first direction, a direction where the movable body and the support body are relatively moved is defined as a second direction which is perpendicular to the first direction, and a direction perpendicular to the first direction and the second direction is defined as a third direction,
a winding part of the coil comprises:
a pair of effective side portions which are arranged in the second direction and extended in the third direction;
a first curved side portion which connects one side ends in the third direction of the pair of the effective side portions; and
a second curved side portion which connects other side ends in the third direction of the pair of the effective side portions;

the magnet faces the pair of the effective side portions and comprises:
a first magnet located on one side with respect to the coil in the first direction; and
a second magnet located on an other side with respect to the coil in the first direction;

the yoke comprises:
a first yoke located on an opposite side of the first magnet with respect to the coil;
a second yoke located on an opposite side of the second magnet with respect to the coil;
a one side connection yoke which is extended in the first direction on one side in the second direction of the coil holder to connect the first yoke with the second yoke; and
an other side connection yoke which is extended in the first direction on an other side in the second direction of the coil holder to connect the first yoke with the second yoke; and

the one side connection yoke and the other side connection yoke are provided at positions so as not to overlap with the effective side portions and the magnet when viewed in the second direction.