Piezoelectric actuator for suppressing disconnection
US-9130149-B2 · Sep 8, 2015 · US
Piezoelectric actuator
US12453289B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12453289-B2 |
| Application number | US-202017783491-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 4, 2020 |
| Priority date | Dec 11, 2019 |
| Publication date | Oct 21, 2025 |
| Grant date | Oct 21, 2025 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
A piezoelectric actuator includes a piezoelectric element having a longitudinal direction, a case including a lid portion, a bottom portion, and a tubular portion and housing the piezoelectric element inside, and a strain gauge positioned at the tubular portion. The tubular portion includes a plurality of bent portions in the longitudinal direction, each of the plurality of bent portions bending in response to extension and contraction of the piezoelectric element. The strain gauge is positioned at the bent portion.
First claim
Opening claim text (preview).
The invention claimed is: 1. A piezoelectric actuator comprising: a piezoelectric element having a longitudinal direction; a case configured to house the piezoelectric element inside, the case comprising a lid portion, a bottom portion, and a tubular portion comprising a plurality of bent portions in the longitudinal direction, the plurality of bent portions each being configured to bend in response to extension and contraction of the piezoelectric element; and a strain gauge positioned at the tubular portion at a bent portion of the plurality of bent portions. 2. The piezoelectric actuator according to claim 1 , wherein the strain gauge is positioned inside the case. 3. The piezoelectric actuator according to claim 1 , wherein the strain gauge is positioned outside the case. 4. The piezoelectric actuator according to claim 1 , wherein the tubular portion has a bellows shape. 5. The piezoelectric actuator according to claim 1 , wherein the tubular portion comprises protrusions, and the strain gauge is positioned on at least one of the protrusions. 6. The piezoelectric actuator according to claim 1 , wherein the tubular portion comprises recesses, and the strain gauge is positioned on at least one of the recesses. 7. The piezoelectric actuator according to claim 1 , wherein the tubular portion comprises protrusions and recesse, and the strain gauge is positioned from at least one of the protrusions to at least one of the recesses. 8. The piezoelectric actuator according to claim 1 , wherein a plurality of the strain gauges are positioned at symmetrical positions with respect to the piezoelectric element. 9. The piezoelectric actuator according to claim 1 , further comprising: a second strain gauge, wherein the second strain gauge is provided on a surface of the piezoelectric element.
Assignees
Inventors
Classifications
Mounts; Supports; Enclosures; Casings · CPC title
- H10N30/50Primary
having a stacked or multilayer structure · CPC title
Constructional details · CPC title
- H10N30/883Primary
Additional insulation means preventing electrical, physical or chemical damage, e.g. protective coatings · CPC title
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Frequently asked questions
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- What does patent US12453289B2 cover?
- A piezoelectric actuator includes a piezoelectric element having a longitudinal direction, a case including a lid portion, a bottom portion, and a tubular portion and housing the piezoelectric element inside, and a strain gauge positioned at the tubular portion. The tubular portion includes a plurality of bent portions in the longitudinal direction, each of the plurality of bent portions bendin…
- Who is the assignee on this patent?
- Kyocera Corp
- What technology area does this patent fall under?
- Primary CPC classification H10N30/50. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 21 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).