Vibrating device and optical detector device

Patent metadata

Field	Value
Publication number	US-11012597-B2
Application number	US-202016817679-A
Country	US
Kind code	B2
Filing date	Mar 13, 2020
Priority date	Dec 27, 2017
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A vibrating device includes a dome-shaped cover, a cylindrical or substantially cylindrical vibrating body, and a piezoelectric element. The dome-shaped cover is disposed so as to include a detection field of an optical detector element, and the cylindrical or substantially cylindrical vibrating body is fixed to the cover. The piezoelectric element is fixed to the vibrating body and vibrates the cover via the vibrating body. The vibrating body includes a cylinder portion, a first connection portion connected to a first end portion of the cylinder portion, a first ring-shaped portion connected to the first connection portion at a position near the cover, a second connection portion connected to a second end portion of the cylinder portion, and a second ring-shaped portion connected to the second connection portion at a position opposite to a surface to which the cylinder portion is connected.

First claim

What is claimed is:

1. A vibrating device comprising:
a dome-shaped cover disposed so as to include a detection field of an optical detector element;
a cylindrical or substantially cylindrical vibrating body to which the cover is fixed; and
a piezoelectric element fixed to the vibrating body and vibrating the cover via the vibrating body; wherein
the vibrating body includes:
a cylinder portion including a first end portion positioned near the cover and a second end portion positioned opposite to the cover;
a cylindrical or substantially cylindrical first connection portion connected to the first end portion of the cylinder portion and having an inside diameter larger than an inside diameter of the cylinder portion;
a first ring-shaped portion connected to the first connection portion at a position near the cover and having an inside diameter smaller than the inside diameter of the first connection portion, the cover being connected to a surface of the first ring-shaped portion proximate to the cover;
a second connection portion connected to the second end portion of the cylinder portion and having an outside diameter smaller than an outside diameter of the cylinder portion; and
a second ring-shaped portion fixed to a surface of the second connection portion opposite to a surface to which the cylinder portion is connected and having an outside diameter larger than the outside diameter of the second connection portion; and

the piezoelectric element is fixed to a surface of the second ring-shaped portion opposite to the surface fixed to the second connection portion.

2. The vibrating device according to claim 1 , wherein the second end portion of the cylinder portion is positioned within a range of about ½±40% of a dimension of the cylindrical or substantially cylindrical vibrating body in a direction extending between the first end portion of the cylinder portion and the second end portion thereof.

3. The vibrating device according to claim 1 , wherein the outside diameter of the second ring-shaped portion is different from the outside diameter of the cylinder portion.

4. The vibrating device according to claim 1 , wherein a difference obtained from a formula of the outside diameter of the second ring-shaped portion—the outside diameter of the cylinder portion is about +16% or less of the outside diameter of the cylinder portion.

5. The vibrating device according to claim 1 , wherein a vibrating portion including the vibrating body and the cover vibrates in a (0, 0) mode.

6. The vibrating device according to claim 5 , wherein a difference obtained from a formula of the outside diameter of the second ring-shaped portion—the outside diameter of the cylinder portion is about 0% or more and about 15% or less of the outside diameter of the cylinder portion.

7. The vibrating body according to claim 1 , wherein a vibrating portion including the vibrating body and the cover vibrates in a (0, 1) mode.

8. The vibrating device according to claim 7 , wherein a difference obtained from a formula of the outside diameter of the second ring-shaped portion—the outside diameter of the cylinder portion is in a vicinity of about 0% of the outside diameter of the cylinder portion or in a range of about 5% or more and about +15% or less of the outside diameter thereof.

9. The vibrating body according to claim 1 , wherein a vibrating portion including the vibrating body and the cover vibrates in a (0, 2) mode.

10. The vibrating device according to claim 9 , wherein a difference obtained from a formula of the outside diameter of the second ring-shaped portion—the outside diameter of the cylinder portion is in a range of about −6% or more and about −4% or less of the outside diameter of the cylinder portion or in a range of about 0% or more and about +12% or less of the outside diameter thereof.

11. The vibrating device according to claim 1 , wherein the outside diameter of the cylinder portion is equal or substantially equal to an outside diameter of the first connection portion.

12. The vibrating device according to claim 1 , wherein the second ring-shaped portion is a vibrating plate.

13. The vibrating device according to claim 12 , wherein the second ring-shaped portion is a flange that protrudes radially outward from an outer circumferential edge of the second connection portion.

14. The vibrating device according to claim 1 , wherein the piezoelectric element has a ring shape, and an outside diameter of the piezoelectric element is equal or substantially equal to the outside diameter of the cylinder portion.

15. The vibrating device according to claim 1 , wherein the cover includes a light-transmissive portion.

16. An optical detector device comprising:
the vibrating device according to claim 1 ; and
an optical detector element disposed in at least a portion of an internal space of the cylindrical or substantially cylindrical vibrating body of the vibrating device and including a detection field in the cover.

17. The optical detector device according to claim 16 , wherein the optical detector element is an imaging element, and the detection field is a field of view.

18. The optical detector device according to claim 16 , wherein the optical detector element is an element that optically detects activation energy beams.

19. The optical detector device according to claim 18 , wherein the activation energy beams are at least one of infrared beams and electromagnetic waves.

Assignees

• Murata Manufacturing Co

Inventors

• Fujimoto Katsumi
• Sakaguchi Hitoshi

Classifications

• H04N23/52 Primary

  Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/54

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• G01S7/4813

  Housing arrangements · CPC title

• G01S7/027

  Constructional details of housings, e.g. form, type, material or ruggedness · CPC title