Vibration structure and vibration generator

Patent metadata

Field	Value
Publication number	US-11930711-B2
Application number	US-202016923345-A
Country	US
Kind code	B2
Filing date	Jul 8, 2020
Priority date	Dec 27, 2018
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

A vibration structure that includes a piezoelectric film constructed to deform in a plane direction as a voltage is applied thereto, a frame-shaped member, a vibration portion surrounded by the frame-shaped member in a plan view of the vibration structure, a support portion connecting the vibration portion and the frame-shaped member, and supporting the vibration portion within the frame-shaped member such that the vibration portion vibrates in the plane direction when the piezoelectric film is deformed in the plane direction, a first connection member that connects the piezoelectric film to the vibration portion, and a second connection member that connects the piezoelectric film to the frame-shaped member. Of the connection members, the first connection member is disposed between the center of gravity of the vibration portion and the second connection member.

First claim

The invention claimed is:

1. A vibration structure comprising:
a film constructed to deform in a plane direction as a voltage is applied thereto;
a frame-shaped member;
a vibration portion surrounded by the frame-shaped member in a plan view of the vibration structure;
a support portion connecting the vibration portion and the frame-shaped member, and supporting the vibration portion within the frame-shaped member such that the vibration portion vibrates in the plane direction when the film is deformed in the plane direction;
a first connection member that connects the film to the vibration portion; and
a second connection member that connects the film to the frame-shaped member, wherein
the first connection member is disposed between a center of gravity of the vibration portion and the second connection member when the vibration portion is viewed in the plan view.

2. The vibration structure according to claim 1 , wherein
the second connection member is disposed on a side surface of the vibration portion,
the first connection member is disposed on a side surface of the frame-shaped member facing the side surface of the vibration member, and
the film is disposed between the first connection member and the second connection member.

3. The vibration structure according to claim 1 , wherein the frame-shaped member, the vibration portion, and the support portion are formed of a same material.

4. The vibration structure according to claim 1 , wherein the vibration portion is a frame-shaped vibration portion.

5. The vibration structure according to claim 4 , wherein the frame-shaped vibration portion has an opening at a position including the center of gravity of the frame-shaped vibration portion.

6. A vibration generator comprising:
the vibration structure according to claim 1 ;
a housing in which the vibration structure is disposed; and
a spacer member that provides a space between the vibration structure and the housing.

7. The vibration generator according to claim 6 , wherein
the second connection member is disposed on a side surface of the vibration portion,
the first connection member is disposed on a side surface of the frame-shaped member facing the side surface of the vibration member, and
the film is disposed between the first connection member and the second connection member.

8. The vibration generator according to claim 6 , wherein the frame-shaped member, the vibration portion, and the support portion are formed of a same material.

9. The vibration generator according to claim 6 , wherein the vibration portion is a frame-shaped vibration portion.

10. The vibration generator according to claim 9 , wherein the frame-shaped vibration portion has an opening at a position including the center of gravity of the frame-shaped vibration portion.

11. A vibration structure comprising:
a film constructed to deform in a plane direction as a voltage is applied thereto;
a frame-shaped member;
a vibration portion surrounded by the frame-shaped member in a plan view of the vibration structure;
a support portion connecting the vibration portion and the frame-shaped member, and supporting the vibration portion within the frame-shaped member such that the vibration portion vibrates in the plane direction when the film is deformed in the plane direction;
a first connection member that connects the film to the vibration portion; and
a second connection member that connects the film to the frame-shaped member.

12. The vibration structure according to claim 11 , wherein
the second connection member is disposed on a side surface of the vibration portion,
the first connection member is disposed on a side surface of the frame-shaped member facing the side surface of the vibration member, and
the film is disposed between the first connection member and the second connection member.

13. The vibration structure according to claim 11 , wherein the frame-shaped member, the vibration portion, and the support portion are formed of a same material.

14. The vibration structure according to claim 11 , wherein the vibration portion is a frame-shaped vibration portion.

15. The vibration structure according to claim 14 , wherein the frame-shaped vibration portion has an opening at a position including the center of gravity of the frame-shaped vibration portion.

16. A vibration generator comprising:
the vibration structure according to claim 11 ;
a housing in which the vibration structure is disposed; and
a spacer member that provides a space between the vibration structure and the housing.

17. The vibration generator according to claim 16 , wherein
the second connection member is disposed on a side surface of the vibration portion,
the first connection member is disposed on a side surface of the frame-shaped member facing the side surface of the vibration member, and
the film is disposed between the first connection member and the second connection member.

18. The vibration generator according to claim 16 , wherein the frame-shaped member, the vibration portion, and the support portion are formed of a same material.

19. The vibration generator according to claim 16 , wherein the vibration portion is a frame-shaped vibration portion.

20. The vibration generator according to claim 19 , wherein the frame-shaped vibration portion has an opening at a position including the center of gravity of the frame-shaped vibration portion.

Assignees

• Murata Manufacturing Co

Inventors

• Hashimoto Junichi
• Endo Jun
• Tominaga Toru
• Otera Shozo

Classifications

• H10N30/206 Primary

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

• H10N30/857

  Macromolecular compositions · CPC title

• H10N30/88

  Mounts; Supports; Enclosures; Casings · CPC title

• B06B1/0688 Primary

  with foil-type piezoelectric elements, e.g. PVDF · CPC title

• B06B1/0648

  of rectangular shape · CPC title