# US 10,311,853 B2 · Piezoelectric sounding body

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- Number: US 10,311,853 B2
- Document ID: US10311853B2
- Status: Granted
- Kind: B2
- Application number: 15/234,825
- Filed: 2016-08-11
- Published: 2017-02-16
- Granted: 2019-06-04
- Earliest claimed: 2015-08-11
- Assignees: TDK Corporation
- Applicants: TDK Corporation
- Inventors: Akira Satoh; Kaoru Kijima
- Web page: https://patentgrep.com/patent/US10311853B2

## CPC

- G10K 9/122: using piezoelectric driving means {(G10K9/121 takes precedence)}
- G10K 9/22: Mountings; Casings
- G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR

## Abstract

A piezoelectric sounding body includes: a piezoelectric vibrating plate; a case housing the piezoelectric vibrating plate; a first conductive terminal electrically connected to one electrode in the piezoelectric vibrating plate; and a second conductive terminal electrically connected to the other electrode in the piezoelectric vibrating plate. The case includes: a lower case where the first conductive terminal and the second conductive terminal are fixed; and an upper case configured to be fixed in a caulking manner to the lower case and to sandwich the piezoelectric vibrating plate between the upper case and the lower case.

## Claims

### Claim 1

A piezoelectric sounding body, comprising:
a piezoelectric vibrating plate;
a case housing the piezoelectric vibrating plate;
a first conductive terminal electrically connected to one electrode in the piezoelectric vibrating plate; and
a second conductive terminal electrically connected to the other electrode in the piezoelectric vibrating plate,
wherein the case includes:
a lower case where the first conductive terminal and the second conductive terminal are fixed; and
an upper case configured to be fixed in a caulking manner to the lower case and to sandwich the piezoelectric vibrating plate between the upper case and the lower case, and
the upper case includes:
a contact projection configured to contact the piezoelectric vibrating plate and to press it toward the lower case; and
an upper case lower surface configured to face the piezoelectric vibrating plate or the lower case with respect to a pressing direction where the piezoelectric vibrating plate is pressed toward the lower case and be arranged with space to the piezoelectric vibrating plate or the lower case wherein
the upper case lower surface includes:
a first upper case lower surface configured to have part of an opening edge of a lower opening; and
a second upper case lower surface configured to have another part of the opening edge, to be positioned farther from the contact projection than the first upper case lower surface, and to have the space being narrower than that of the first upper case lower surface.

### Claim 2 (depends on 1)

The piezoelectric sounding body according to claim 1, wherein
a sealing resin is arranged on a contact portion between the piezoelectric vibrating plate and the contact projection.

### Claim 3 (depends on 1)

The piezoelectric sounding body according to claim 1, wherein
a plurality of insertion holes where a caulking projection for fixing the upper case in a caulking manner to the lower case is inserted is formed in the upper case and has the lower opening positioned on the upper case lower surface.

### Claim 4 (depends on 2)

The piezoelectric sounding body according to claim 2, wherein
a plurality of insertion holes where a caulking projection for fixing the upper case in a caulking manner to the lower case is inserted is formed in the upper case and has the lower opening positioned on the upper case lower surface.

### Claim 5 (depends on 3)

The piezoelectric sounding body according to claim 3, wherein
the contact projection extends along a circumferential direction of the piezoelectric vibrating plate and the plurality of insertion holes is positioned farther than the contact projection with respect to a center of the piezoelectric vibrating plate.

### Claim 6 (depends on 4)

The piezoelectric sounding body according to claim 4, wherein
the contact projection extends along a circumferential direction of the piezoelectric vibrating plate and
the plurality of insertion holes is positioned farther than the contact projection with respect to a center of the piezoelectric vibrating plate.

### Claim 7

A piezoelectric sounding body, comprising:
a piezoelectric vibrating plate;
a case housing the piezoelectric vibrating plate;
a first conductive terminal electrically connected to one electrode in the piezoelectric vibrating plate; and
a second conductive terminal electrically connected to the other electrode in the piezoelectric vibrating plate,
wherein the case includes:
a lower case where the first conductive terminal and the second conductive terminal are fixed; and
an upper case configured to be fixed in a caulking manner to the lower case and to sandwich the piezoelectric vibrating plate between the upper case and the lower case, and
the upper case includes:
a contact projection configured to contact the piezoelectric vibrating plate and to press it toward the lower case; and
an upper case lower surface configured to face the piezoelectric vibrating plate or the lower case with respect to a pressing direction where the piezoelectric vibrating plate is pressed toward the lower case and be arranged with space to the piezoelectric vibrating plate or the lower case wherein
a plurality of Insertion holes where a caulking projection for fixing the upper case in a caulking manner to the lower case is inserted is formed in the upper case and has a lower opening positioned on the upper case lower surface,
the caulking projection has a base connecting to the lower case and an upper edge being larger than a diameter of the insertion hole at upper side to the insertion hole.