Piezoelectric driving device for motor, motor, robot, and pump
US-2016365809-A1 · Dec 15, 2016 · US
Piezoelectric actuator
US9735337B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9735337-B2 |
| Application number | US-201414335337-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 18, 2014 |
| Priority date | Jul 25, 2013 |
| Publication date | Aug 15, 2017 |
| Grant date | Aug 15, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A piezoelectric actuator comprises a substantially rectangular parallelepiped piezoelectric element. One outer surface of the piezoelectric element includes a first region, and a second region located such as to project from the first region and to overlap a region corresponding to an active portion in the one outer surface. The second region has a flat surface configured to come into contact with a body to be driven and to generate a frictional force therewith. The flat surface is shorter in a longitudinal direction of the piezoelectric element than in a lateral direction thereof. The flat surface is longer in the longitudinal direction of the piezoelectric element at a lateral center region thereof than at a lateral end region thereof.
First claim
Opening claim text (preview).
What is claimed is: 1. A piezoelectric actuator comprising a substantially rectangular parallelepiped piezoelectric element configured to generate first and second vibration modes simultaneously with each other in response to a voltage applied thereto, wherein the piezoelectric element has an active portion located between a plurality of inner electrodes arranged in the piezoelectric element and configured to be displaced in response to a voltage applied thereto, wherein one outer surface of the piezoelectric element includes a first region, and a second region located such as to project from the first region and to overlap a region corresponding to the active portion in the one outer surface, wherein the second region has a flat surface configured to come into contact with a body to be driven and generate a frictional force therewith, wherein the flat surface is shorter in a longitudinal direction of the piezoelectric element than in a lateral direction thereof, and wherein the flat surface is longer in the longitudinal direction of the piezoelectric element at a lateral center region thereof than at a lateral end region thereof. 2. A piezoelectric actuator according to claim 1 , wherein the flat surface has a lateral length equal to or shorter than that of the active portion. 3. A piezoelectric actuator according to claim 1 , wherein the second region overlaps a center of the active portion as seen from a direction orthogonal to the one outer surface.
Assignees
Inventors
Classifications
by pressing one or more vibrators against the driven body · CPC title
- H02N2/004Primary
Rectangular vibrators · CPC title
- H01L41/0471Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9735337B2 cover?
- A piezoelectric actuator comprises a substantially rectangular parallelepiped piezoelectric element. One outer surface of the piezoelectric element includes a first region, and a second region located such as to project from the first region and to overlap a region corresponding to an active portion in the one outer surface. The second region has a flat surface configured to come into contact w…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H02N2/004. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 15 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).