VIBRATING DEVICE

• US 20110095649A1
• Filed: 11/18/2010
• Published: 04/28/2011
• Est. Priority Date: 05/19/2008
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Kagayama, Kenji, Unami, Toshihiko
• Granted Patent: US 8,513,858 B2
• Time in Patent Office: Days
• US Class Current: 310/323.01
• CPC Class Codes: B06B 1/0603 using a piezoelectric bender, e.g. bimorph
• CPC Class Codes: H10N 30/204 using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
• CPC Class Codes: H10N 30/2042 Cantilevers, i.e. having one fixed end

Abstract

A vibrating device that includes a small number of components and that has a high vibration transmission efficiency is provided. The vibrating device is fixed to a fixing member. The vibrating device includes a single elastic plate and piezoelectric vibrating plates. The elastic plate includes a fixing portion, a vibrating portion, and a connecting portion. The fixing portion is attached to the fixing member. The vibrating portion is arranged to be substantially parallel to and spaced from a fixing surface at which the fixing portion is fixed to the fixing member. The connecting portion connects an end part of the fixing portion and an end part of the vibrating portion to each other. The piezoelectric vibrating plates are provided on surfaces of the vibrating portion.

Claims

1. A vibrating device comprising:

a single elastic plate including a fixing portion adapted to be fixed to a fixing member, a vibrating portion arranged substantially parallel to and spaced from a fixing surface at which the fixing portion is fixed to the fixing member, and a connecting portion connecting an end part of the fixing portion and an end part of the vibrating portion to each other; and

a first piezoelectric vibrating plate provided on a first surface of the vibrating portion.

2. The vibrating device according to claim 1, further comprising a second piezoelectric vibrating plate provided on a second surface of the vibrating portion, the second surface opposing the first surface.

3. The vibrating device according to claim 1, wherein the single elastic plate is composed of a metal.

4. The vibrating device according to claim 1, wherein an area of the fixing portion that is adapted to be fixed to the fixing member is larger than an area of the piezoelectric vibrating plate.

5. The vibrating device according to claim 1, wherein the connecting portion is in the shape of an arc.

6. The vibrating device according to claim 5, wherein the arc has a central angle of about 180°

.

7. The vibrating device according to claim 1, wherein the connecting portion includes a part that is substantially perpendicular to the fixing portion.

8. The vibrating device according to claim 7, wherein the connecting portion further includes first and second connecting parts, the first connecting part connecting the part that is substantially perpendicular to the fixing portion to the fixing portion, and the second connecting part connecting the part that is substantially perpendicular to the fixing portion to the vibrating portion.

9. The vibrating device according to claim 8, wherein the first and second connecting parts have a central angle of about 90°

10. The vibrating device according to claim 1, wherein the connecting portion includes a plurality of bent parts along a connecting direction between the fixing portion and the vibrating portion.