Dielectric elastomer transducer and dielectric elastomer driving device

Patent metadata

Field	Value
Publication number	US-11081976-B2
Application number	US-201816620576-A
Country	US
Kind code	B2
Filing date	Jun 11, 2018
Priority date	Jun 21, 2017
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

A dielectric elastomer transducer includes a dielectric elastomer function element having a dielectric elastomer layer and a pair of electrode layers between which the dielectric elastomer function element is interposed, and further includes a supporting body that supports the dielectric elastomer function element. Each of the electrode layers has one or more application regions. The dielectric elastomer function element has one or more function portions on which the application regions of the electrode layers are overlapped. The function portion is spaced away from the supporting body. With such a configuration, it is possible to avoid damaging the electrode layer and acquire a sufficient amount of expansion.

First claim

The invention claimed is:

1. A dielectric elastomer transducer comprising a dielectric elastomer function element having a dielectric elastomer layer and a pair of electrode layers between which the dielectric elastomer layer is interposed, and
further comprising a supporting body that supports the dielectric elastomer function element, wherein
each of the electrode layers has one or more application regions,
the dielectric elastomer function element has one or more function portions on which the application regions of the electrode layers are overlapped, and
the function portion is spaced away from the supporting body.

2. The dielectric elastomer transducer according to claim 1 , wherein
the dielectric elastomer function element has one or more electrode-less portions in which the electrode layer is not provided, and
the electrode-less portion is fixed to the supporting body.

3. The dielectric elastomer transducer according to claim 2 , wherein the dielectric elastomer function element has a tubular shape.

4. The dielectric elastomer transducer according to claim 3 , wherein the dielectric elastomer function element has a tubular shape in which at least the function portion is a single sheet without overlapping.

5. The dielectric elastomer transducer according to claim 3 , wherein the dielectric elastomer function element has a plurality of the function portions that are spaced away from each other in an axial direction.

6. The dielectric elastomer transducer according to claim 5 , wherein
the electrode layer has a coupling portion that couples together the application regions, and
the coupling portion is not fixed to the supporting body.

7. The dielectric elastomer transducer according to claim 6 , wherein the coupling portion of one of the electrode layers does not overlap with the other electrode layer.

8. The dielectric elastomer transducer according to claim 3 , wherein the application region is divided into a plurality of portions in a circumferential direction.

9. The dielectric elastomer transducer according to claim 3 , wherein the supporting body is formed of a plurality of plate members that have a circular shape when viewed in an axial direction and that are disposed so as to be spaced away in the axial direction.

10. The dielectric elastomer transducer according to claim 1 , wherein the dielectric elastomer function element has a tubular shape.

11. The dielectric elastomer transducer according to claim 10 , wherein the dielectric elastomer function element has a tubular shape in which at least the function portion is a single sheet without overlapping.

12. The dielectric elastomer transducer according to claim 10 , wherein the dielectric elastomer function element has a plurality of the function portions that are spaced away from each other in an axial direction.

13. The dielectric elastomer transducer according to claim 12 , wherein
the electrode layer has a coupling portion that couples together the application regions, and
the coupling portion is not fixed to the supporting body.

14. The dielectric elastomer transducer according to claim 13 , wherein the coupling portion of one of the electrode layers does not overlap with the other electrode layer.

15. The dielectric elastomer transducer according to claim 10 , wherein the application region is divided into a plurality of portions in a circumferential direction.

16. The dielectric elastomer transducer according to claim 10 , wherein the supporting body is formed of a plurality of plate members that have a circular shape when viewed in an axial direction and that are disposed so as to be spaced away in the axial direction.

17. The dielectric elastomer transducer according to claim 1 , further comprising a wiring connected to the application region.

18. The dielectric elastomer transducer according to claim 1 , further comprising a tensile force maintaining body that causes the dielectric elastomer function element to expand.

19. A dielectric elastomer driving device comprising:
the dielectric elastomer transducer according to claim 1 ; and
a power source unit for applying a voltage to the dielectric elastomer transducer.

Assignees

• Aisin Aw Co
• Chiba Seiki
• Waki Mikio

Inventors

• Chiba Seiki
• Waki Mikio

Classifications

• 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

• H02N1/006 Primary

  of the gap-closing type (H02N1/004 takes precedence) · CPC title

• B06B1/0292 Primary

  Electrostatic transducers, e.g. electret-type · CPC title

• H10N30/30

  with mechanical input and electrical output, e.g. functioning as generators or sensors · CPC title

• H10N30/206

  using only longitudinal or thickness displacement, e.g. d33 or d31 type devices · CPC title