Inertial drive actuator

Patent metadata

Field	Value
Publication number	US-9621075-B2
Application number	US-201414528306-A
Country	US
Kind code	B2
Filing date	Oct 30, 2014
Priority date	May 1, 2012
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

The task of the present invention is to provide an inertial drive actuator having a small-size arrangement, without using a vibration substrate. The inertial drive actuator includes a coil, a movable body which is disposed in a direction in which, a magnetic flux of the coil is generated, and which is formed of a magnetic material having a surface facing the coil, and a displacement generator (piezoelectric element) which displaces the coil in a direction different from the direction in which the magnetic flux is generated. Moreover, the movable body is displaced relatively with respect to the displacement generator (piezoelectric element), along a direction of displacement of the displacement generator (piezoelectric element).

First claim

What is claimed is:

1. An inertial drive actuator comprising:
a coil;
a movable body which is disposed in a direction in which, a magnetic flux of the coil is generated, and which is formed of a magnetic material having a surface facing the coil; and
a displacement generator which displaces the coil in a direction different from the direction in which the magnetic flux is generated, wherein
the movable body is displaced relatively with respect to the displacement generator, along a direction of displacement of the displacement generator.

2. The inertial drive actuator according to claim 1 , further comprising:
a core material which is disposed at an inner side of the coil, and which is formed of a magnetic material.

3. The inertial drive actuator according to claim 1 , further comprising:
a permanent magnet which is disposed in a direction of the coil, different from the movable body.

4. The inertial drive actuator according to claim 1 , further comprising:
a yoke material which is disposed in the direction of the coil, different from the movable body.

5. The inertial drive actuator according to claim 2 , wherein the core material is interposed between the movable body and the coil.

6. The inertial drive actuator according to claim 3 , wherein the core material is interposed between the permanent magnet and the coil.

7. The inertial drive actuator according to claim 2 , wherein the core material is displaced by the displacement generator.

8. The inertial drive actuator according to claim 3 , wherein the permanent magnet is displaced by the displacement generator.

9. The inertial drive actuator according to claim 4 , wherein the yoke material is displaced by the displacement generator.

10. The inertial drive actuator according to claim 4 , comprising:
a non-magnetic layer between the movable body and the yoke material, wherein
the movable body becomes a yoke.

11. The inertial drive actuator according to claim 4 , wherein the permanent magnet is interposed between the yoke material and the coil.

Assignees

• Olympus Corp

Inventors

• Morishima Tetsuya

Classifications

• H02N2/0055

  Supports for driving or driven bodies; Means for pressing driving body against driven body · CPC title

• H02N2/026 Primary

  by pressing one or more vibrators against the driven body · CPC title

• H02N2/025 Primary

  Inertial sliding motors · CPC title