Piezoelectric actuator

Patent metadata

Field	Value
Publication number	US-2021408362-A1
Application number	US-202117349249-A
Country	US
Kind code	A1
Filing date	Jun 16, 2021
Priority date	Jun 30, 2020
Publication date	Dec 30, 2021
Grant date	—

Abstract

A piezoelectric actuator includes a square suspension plate, an outer frame, a plurality of brackets and a square piezoelectric ceramic plate. The outer frame is arranged around the suspension plate. A second surface of the outer frame and a second surface of the suspension plate are coplanar with each other. Each of the plurality of brackets has two ends, a first end is perpendicular to and connected with the suspension plate, and a second end is perpendicular to and connected with the outer frame for elastically supporting the suspension plate. Each bracket has a length in a range between 1.22 mm and 1.45 mm and a width in a range between 0.2 mm and 0.6 mm. A length of the piezoelectric ceramic plate is not larger than a length of the suspension plate. The piezoelectric ceramic plate is attached on a first surface of the suspension plate.

First claim

What is claimed is:

1 . A piezoelectric actuator, comprising:
a suspension plate having a square shape and with a central portion and a periphery portion, wherein the suspension plate is permitted to undergo a curvy vibration from the central portion to the periphery portion; an outer frame arranged around the suspension plate; a plurality of brackets, wherein each of the plurality of brackets has two ends, a first end is perpendicular to and connected with the suspension plate, and a second end is perpendicular to and connected with the outer frame for elastically supporting the suspension plate, and each bracket has a length in a range between 1.22 mm and 1.45 mm, and a width in a range between 0.2 mm and 0.6 mm; and a piezoelectric ceramic plate having a square shape, wherein a length of a side of the piezoelectric ceramic plate is equal to or less than a length of a side of the suspension plate, and the piezoelectric ceramic plate is attached on a first surface of the suspension plate to drive the suspension plate to undergo the curvy vibration when a voltage is applied to the piezoelectric ceramic plate.

2 . The piezoelectric actuator according to claim 1 , wherein the plurality of brackets are four brackets.

3 . The piezoelectric actuator according to claim 1 , wherein the first end of each bracket is perpendicular to and connected with a lateral rim of the suspension plate, and the second end of the bracket is perpendicular to and connected with an inner rim of the outer frame.

4 . The piezoelectric actuator according to claim 1 , wherein the length of each bracket is 1.30 mm.

5 . The piezoelectric actuator according to claim 1 , wherein the width of each bracket is 0.45 mm.

6 . The piezoelectric actuator according to claim 1 , wherein a thickness of the piezoelectric ceramic plate is in a range between 0.05 mm and 0.3 mm.

7 . The piezoelectric actuator according to claim 6 , wherein the thickness of the piezoelectric ceramic plate is 0.10 mm.

8 . The piezoelectric actuator according to claim 1 , wherein a length of the suspension plate is in a range between 7.5 mm and 12 mm, and a thickness of the suspension plate is in a range between 0.1 mm and 0.4 mm.

9 . The piezoelectric actuator according to claim 8 , wherein the length of the suspension plate is in a range between 9 mm and 10 mm, and the thickness of the suspension plate is 0.27 mm.

Assignees

• Microjet Technology Co Ltd

Inventors

• Mou Hao-Jan
• Chen Shih-Chang
• Liao jia-yu
• Liao Hung-Hsin
• Huang Che-Wei
• Huang Chi-Feng
• Han Yung-Lung
• Kuo Chun-Yi
• Lee Wei-Ming

Classifications

• F04B45/047

  Pumps having electric drive · CPC title

• H01L41/053

  Electricity · mapped topic

• H01L41/09 Primary

  Electricity · mapped topic

• H10N30/2047

  Membrane type · CPC title

• H10N30/20 Primary

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