US12573928USUSPTO Grant XML

Actuator with coil positioning structure

An actuator includes a movable body, a support body provided with a case that houses the movable body and a coil assembly, a first connecting body and a second connecting body to be connected to the movable body and the support body, and a magnetic drive circuit that vibrates the movable body with respect to the support body in an X direction. The coil assembly includes a first plate that overlaps the coil from a Z1 direction, and a second plate that overlaps the coil from a Z2 direction. The first plate includes a notch portion that comes into contact with a short side portion of the coil from an outer peripheral side, and positions the coil by the notch portion.

Patent

Brief

Patent brief

Problem

How can vibration in electric motors and rotors be reduced?

Novelty

The coil assembly includes a first plate that overlaps the coil from a Z1 direction, and a second plate that overlaps th...

Uses

Motor control, Precision machinery, Electromechanical systems

Assignee

NIDEC SANKYO CORPORATION

Published

Mar 10, 2026

Inventors

Shinji Hatano, Masao Tsuchihashi

Domain

Electromechanical systems

Plain-English summary

Problem

How can vibration in electric motors and rotors be reduced?

Solution

actuator includes a movable body, a support body provided with a case that houses the movable body and a coil assembly, a first connecting body and a second connecting body to be connected to the movable body and the support body, and a magnetic drive circuit that vibrates the movable body with respect to the support body in an X direction.

Key novelty

The coil assembly includes a first plate that overlaps the coil from a Z1 direction, and a second plate that overlaps the coil from a Z2 direction.

Applications

Motor controlPrecision machineryElectromechanical systems

Relevant search intents

actuator

Claims preview

1 . An actuator comprising: a movable body; a support body comprising a case that houses the movable body; a connecting body to be connected to the movable body and the support body; and a magnetic drive circuit comprising a coil and a magnet facing the coil in a first direction, and vibrating the movable body with respect to the support body in a second direction intersecting the first direction, wherein the support body comprises a first plate that is made of metal and overlaps the coil from one side in the first direction, and the coil is fixed to the case via the first plate, the case comprising a first case member and a second case member, the first case member comprising a first cutout concave portion and the second case member comprising a second cutout concave portion facing the first cutout concave portion, the coil is an air-core coil comprising a pair of long side portions aligned in the second direction, and a pair of short side portions that connect the pair of long side portions, and the first plate comprises a positioning portion that positions the coil in a direction intersecting the first direction by coming into contact with the coil from an outer peripheral side, wherein the first plate further comprises a protruding plate portion that fits into both the first and second cutout concave portions to thereby position the first plate with respect to the case. 2 . The actuator according to claim 1 , wherein the positioning portion comes into contact with at least either one of the pair of short side portions from the outer peripheral side. 3 . The actuator according to claim 1 , wherein the pair of short side portions has an arc shape, and the positioning portion is disposed at two locations symmetrical in the second direction with respect to a middle of the pair of short side portions in the second direction.

Linked approaches

Active control systems

Control loops that counter vibration using sensing and actuation.

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