JP2011239571A5

JP2011239571A5 -

Info

Publication number: JP2011239571A5
Application number: JP2010109022A
Authority: JP
Filing date: 2010-05-11
Publication date: 2013-06-20
Anticipated expiration: 2030-05-11

Description

本発明の振動波アクチュエータは、少なくとも電気−機械エネルギー変換素子と、前記電気−機械エネルギー変換素子が接合され接触部が形成された弾性体とを有し、前記接触部に楕円運動が生成可能に構成された振動体と、
前記振動体の接触部と加圧接触し前記楕円運動によって移動する被駆動体と、を有する振動波アクチュエータであって、
前記振動体よりも剛性の低い第一の弾性部材を介して該振動体を保持する振動体保持部を備え、
前記振動体保持部に磁石が配置されると共に、前記被駆動体が磁性体で構成されていることを特徴とする。
The vibration wave actuator of the present invention includes at least an electro-mechanical energy conversion element and an elastic body in which the electro-mechanical energy conversion element is joined to form a contact portion, and an elliptical motion can be generated in the contact portion. A configured vibrator,
A driven body that is in pressure contact with the contact portion of the vibrating body and moves by the elliptical motion,
Comprising a vibrating body holding portion for holding the vibrating body via a first elastic member having a rigidity lower than that of the vibrating body;
With magnet is disposed in the vibrator holding portion, the driven member is characterized by being composed of a magnetic material.

Claims

A vibrator having at least an electro-mechanical energy conversion element and an elastic body in which the electro-mechanical energy conversion element is joined to form a contact portion, and configured to generate an elliptical motion in the contact portion;
A driven body that is in pressure contact with the contact portion of the vibrating body and moves by the elliptical motion,
Comprising a vibrating body holding portion for holding the vibrating body via a first elastic member having a rigidity lower than that of the vibrating body;
Vibration wave actuator wherein with the magnet is disposed to the vibrating body holding portion, the driven member is characterized by being composed of a magnetic material.

Vibration actuator according to claim 1, wherein said vibrating body holding portion, characterized in that it is connected to the fixed portion through the lower rigidity than the first elastic member second elastic member.

The second elastic member is elastically deformed so that the vibrating body holding portion follows the driven body when the contact portion of the vibrating body and the driven body are in pressure contact. The vibration wave actuator according to claim 2.

4. The vibration wave actuator according to claim 1, wherein the contact portion of the vibration body and the driven body are brought into pressure contact with each other by an attractive force of the magnet. 5.

4. The vibration wave actuator according to claim 1, wherein the first elastic member is a portion in which a part of the elastic body is thinned.

The vibration wave actuator according to any one of claims 1 to 5, wherein the elastic body of the vibration body is made of a magnetic body.

Said magnet is in said vibration member side of the vibrating body holding portion, according to any one of claims 1 6, characterized in that it is arranged between the vibrating body holding portion and the vibration member Vibration wave actuator.

The magnet, the vibration wave actuator as claimed in any one of claims 1 to 6, wherein the said vibration member side of the vibrator holding portion, characterized in that it is arranged on the opposite side.

The vibration wave actuator according to any one of claims 1 to 8 , wherein the vibrating body holding portion is configured integrally with the magnet.

A plurality of the vibrators;
The plurality of vibrators are arranged at positions where the directions of the forces generated by the elliptical motion are different, and in a predetermined moving direction in which the forces in the different directions are combined, press contact is made via the contact portions of the vibrators. vibration actuator according to any one of claims 1 9, characterized in that to move the driven member you are.