Actuator, driving member, tactile sense presenting device, and driving device

Patent metadata

Field	Value
Publication number	US-11433425-B2
Application number	US-201816612281-A
Country	US
Kind code	B2
Filing date	May 2, 2018
Priority date	May 10, 2017
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

An actuator includes a laminate including an elastomer layer and an electrode, in which the laminate has a spiral or concentric shape, pre-distortion is applied to at least one member out of the elastomer layer and the electrode, and area distortion of the at least one member is 10% or larger.

First claim

The invention claimed is:

1. An actuator comprising:
a laminate including an elastomer layer and an electrode,
wherein the laminate has a spiral or concentric shape,
pre-distortion is applied to at least one member out of the elastomer layer and the electrode, and
area distortion of the at least one member is 10% or larger, and
wherein a Young's modulus of the elastomer layer is from 0.05 MPa to 10 MPa.

2. The actuator according to claim 1 , wherein a stress ratio (A:B) between a stress A in an axial direction and a stress B in a circumferential direction of the laminate is 1:2.

3. The actuator according to claim 1 , wherein the area distortion of the at least one member is 50% or larger.

4. The actuator according to claim 1 , wherein the pre-distortion is applied in an axial direction and a circumferential direction of the laminate.

5. The actuator according to claim 4 , wherein a contraction force in the axial direction and a contraction force in the circumferential direction of the laminate are balanced.

6. The actuator according to claim 1 ,
wherein breaking distortion of the elastomer layer is 50% or larger.

7. The actuator according to claim 1 , wherein at least one member out of the elastomer layer and the electrode has a multilayer structure.

8. The actuator according to claim 7 , wherein a surface layer of the member having the multilayer structure has stickiness.

9. The actuator according to claim 1 , wherein at least one member out of the elastomer layer and the electrode has a sticky surface.

10. The actuator according to claim 1 , further comprising:
a winding stop member which stops winding the laminate having a spiral shape.

11. The actuator according to claim 1 , further comprising:
a tubular housing member which houses the laminate having a spiral shape.

12. The actuator according to claim 1 , wherein one end on an outermost circumferential side of the laminate having a spiral shape is stopped winding by adhesion.

13. The actuator according to claim 1 , wherein the actuator is spirally twisted.

14. The actuator according to claim 1 , wherein the actuator has a fiber shape.

15. A driving member comprising: a plurality of the actuators according to claim 1 .

16. The driving member according to claim 15 , wherein the plurality of actuators is bundled.

17. The driving member according to claim 15 , wherein the plurality of actuators is arranged in line such that axial directions of the plurality of actuators are in a same direction, and peripheral surfaces of adjacent actuators face each other.

18. The driving member according to claim 15 , wherein the plurality of actuators is arranged in a mesh pattern.

19. A tactile sense presenting device comprising: the actuator according to claim 1 .

20. A driving device comprising: the actuator according to claim 1 .

Assignees

• Sony Corp

Inventors

• Nakata Akihiro
• Nakamaru Satoshi
• Goto Yoshio
• Ishikawa Hiroichi
• Sakai Kentarou
• Wakana Kazuhito

Classifications

• B06B1/0603 Primary

  using a piezoelectric bender, e.g. bimorph · CPC title

• H02N2/10

  producing rotary motion, e.g. rotary motors · CPC title

• H02N11/00

  Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means (by hydrostatic pressure F03B17/04; {by mechanical means F03G7/10;} by dynamo-electric means, {including arrangements of permanent magnets interacting with other permanent magnets,} H02K53/00) · CPC title

• G08B6/00

  Tactile signalling systems, e.g. tactile personal calling systems · CPC title

• H01L41/0973

  Electricity · mapped topic