# US 12,225,826 B2 · Vibration device

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- Number: US 12,225,826 B2
- Document ID: US12225826B2
- Status: Granted
- Kind: B2
- Application number: 18/079,292
- Filed: 2022-12-12
- Published: 2023-07-20
- Granted: 2025-02-11
- Earliest claimed: 2022-01-17
- Assignees: TDK Corporation
- Applicants: TDK Corporation
- Inventors: Akira Satoh; Kaoru Kijima
- Web page: https://patentgrep.com/patent/US12225826B2

## CPC

- H04R 1/2888: {for loudspeaker transducers}
- H10N 30/875: {Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins}
- H04R 17/00: Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00})
- H10N 30/88: Mounts; Supports; Enclosures; Casings
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

A vibration device includes: a piezoelectric unit including a piezoelectric element; a housing that holds the piezoelectric unit; a wiring member electrically connected to the piezoelectric unit; and a joining member that joins the housing to an external device. The housing includes a bottom surface portion to which the piezoelectric unit is fixed, and a side surface portion standing at an edge portion of the bottom surface portion. The side surface portion has a first surface formed on a top portion of the side surface portion, and a second surface that is one step lowered from the first surface by a cutout portion formed in the top portion. The joining member extends along the first surface to bridge over the cutout portion. The wiring member is joined to the joining member at a position of the first surface, and passes through the cutout portion in a state where the wiring member is not joined to the second surface.

## Claims

### Claim 1

A vibration device comprising:
a piezoelectric unit including a piezoelectric element;
a housing that holds the piezoelectric unit;
a wiring member electrically connected to the piezoelectric unit; and
a joining member that joins the housing to an external device,
wherein the housing includes a bottom surface portion to which the piezoelectric unit is fixed, and a side surface portion standing at an edge portion of the bottom surface portion,
the side surface portion has a first surface formed on a top portion of the side surface portion, and a second surface that is one step lowered from the first surface by a cutout portion formed in the top portion,
the joining member extends along the first surface to bridge over the cutout portion, and
the wiring member is joined to the joining member at a position of the first surface, and passes through the cutout portion in a state where the wiring member is not joined to the second surface.

### Claim 2 (depends on 1)

The vibration device according to claim 1,
wherein the joining member is joined to at least a part of the second surface.

### Claim 3 (depends on 2)

The vibration device according to claim 2,
wherein a joining area between the wiring member and the joining member is larger than a joining area between the second surface and the joining member.

### Claim 4 (depends on 1)

The vibration device according to claim 1,
wherein a tensile force is applied to the wiring member in an extending direction of the wiring member between the piezoelectric unit and the cutout portion.

### Claim 5 (depends on 1)

The vibration device according to claim 1,
wherein the side surface portion is smoothly continuous with the bottom surface portion, and is inclined to open outward from the edge portion with respect to the bottom surface portion.