# US 2014/0193026 A1 · Loudspeaker, electronic device and mobile device both including the same, and method of producing the same

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- Number: US 2014/0193026 A1
- Document ID: US20140193026A1
- Status: Published application
- Kind: A1
- Application number: 14/240,027
- Filed: 2013-06-18
- Published: 2014-07-10
- Earliest claimed: 2012-06-22
- Assignees: Panasonic Corporation
- Applicants: Panasonic Corporation
- Inventors: Kenichi Ajiki; Toshinori Yamaji; Keiji Ishikawa; Masamichi Ara
- Web page: https://patentgrep.com/patent/US20140193026A1

## CPC

- H04R 1/00: Details of transducers, {loudspeakers or microphones}
- H04R 31/006: {Interconnection of transducer parts (of diaphragm and outer suspension by moulding H04R31/003)}
- H04R 9/02: Details
- H04R 2499/13: Acoustic transducers and sound field adaptation in vehicles
- 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)

## Abstract

A magnetic circuit includes an upper plate, a magnet, a lower plate, and a center pole. The outer circumference of a frame is coupled with a diaphragm. One end of a voice coil is coupled with the diaphragm, and the other end is inserted into a magnetic gap formed between the upper plate and the center pole. The frame is provided with a through hole. An insertion part provided on the outer circumference of the upper plate is inserted into the through hole. The frame is coupled with the upper plate by bending the insertion part.

## Claims

### Claim 1

A loudspeaker comprising:
a frame provided with a through hole;
an upper plate having a main part coupled with a lower face of the frame;
a magnet under the upper plate;
a lower plate under the magnet;
a center pole disposed at a central part of the lower plate, the center pole forming a magnetic gap between the center pole and the upper plate;
a diaphragm coupled with an outer circumference of the frame; and
a voice coil having a first end coupled with the diaphragm and a second end inserted in the magnetic gap,
wherein the upper plate has an insertion part provided at a part of an outer circumference of the main part, inserted into the through hole, and having a penetrating part penetrating the frame and being bent.

### Claim 2 (depends on 1)

The loudspeaker according to claim 1, wherein a plan view of the main part shows angular parts.

### Claim 3 (depends on 2)

The loudspeaker according to claim 2, wherein the insertion part is provided at one of the angular parts of the main part.

### Claim 4 (depends on 1)

The loudspeaker according to claim 1, wherein the insertion part is bent toward an inside of the frame.

### Claim 5 (depends on 1)

The loudspeaker according to claim 1, wherein the insertion part is bent toward an outside of the frame.

### Claim 6 (depends on 1)

The loudspeaker according to claim 1,
wherein the upper plate further includes a burring formed at a center of the main part, and
the magnetic gap is formed between the center pole and an inner circumferential surface of the burring.

### Claim 7 (depends on 1)

The loudspeaker according to claim 1,
wherein the frame further includes a projection provided on a surface opposite to a side, joining with the main part of the upper plate, and touching the penetrating part.

### Claim 8 (depends on 7)

The loudspeaker according to claim 7,
wherein the frame is made of resin, and
a tip of the projection has a buckling part formed thereon.

### Claim 9 (depends on 8)

The loudspeaker according to claim 8, further including an adhesive agent bonding the projection to the penetrating part, or bonding a part of a circumference of the projection to the insertion part.

### Claim 10 (depends on 7)

The loudspeaker according to claim 7,
wherein the frame is made of resin, and is provided with a space at a side opposite to a direction, in which the penetrating part is bent, with respect to the through hole.

### Claim 11 (depends on 10)

The loudspeaker according to claim 10,
wherein the space is a recess,
the loudspeaker further includes an adhesive agent fed into the recess, and the adhesive agent bonds a periphery of the recess to the penetrating part.

### Claim 12 (depends on 1)

An electronic device including:
an enclosure;
an amplifier accommodated in the enclosure; and
the loudspeaker according to claim 1 electrically connected with the amplifier.

### Claim 13 (depends on 1)

A mobile device including:
a main part;
a driving part generating power for moving the main part;
an amplifier accommodated in the main part; and
the loudspeaker according to claim 1 electrically connected with the amplifier.

### Claim at position 14

14-26. (canceled)