# US 12,010,498 B2 · Speaker

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- Number: US 12,010,498 B2
- Document ID: US12010498B2
- Status: Granted
- Kind: B2
- Application number: 17/859,265
- Filed: 2022-07-07
- Published: 2023-02-09
- Granted: 2024-06-11
- Earliest claimed: 2021-08-06
- Assignees: Alps Alpine Co., Ltd.
- Applicants: Alps Alpine Co., Ltd.
- Inventors: Haruki Uesugi; Kei Tanabe; Yusuke Yoshida
- Web page: https://patentgrep.com/patent/US12010498B2

## CPC

- H04R 9/025: {Magnetic circuit}
- H04R 9/045: {Mounting (H04R9/043 takes precedence)}
- H04R 1/288: {for loudspeaker transducers}
- H04R 9/047: {in which the windings of the moving coil lay in the same plane}
- H04R 9/06: Loudspeakers
- H04R 2209/027: Electrical or mechanical reduction of yoke vibration
- H04R 2400/07: Suspension between moving magnetic core and housing
- H04R 2400/11: Aspects regarding the frame of loudspeaker transducers
- 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

An outer structure of a magnetic circuit is held inside a holder recess of a magnetic circuit holder of a frame. A pressing portion is screw-fixed to a mounting surface of the magnetic circuit holder. Elastically deformable pressing arms are formed at the pressing portion, and the pressing arms press a restriction surface of the outer structure of the magnetic circuit.

## Claims

### Claim 1

A speaker comprising:
a frame;
a diaphragm supported by the frame so as to enable the diaphragm to vibrate;
a coil that drives the diaphragm to vibrate; and
a magnetic circuit that is positioned rearward relative to the diaphragm and applies a magnetic field to the coil, wherein:
the frame has a magnetic circuit holder in which the magnetic circuit is held,
the magnetic circuit holder has a mounting surface that faces frontward,
the magnetic circuit has a restriction surface that faces frontward,
the magnetic circuit holder has pressing arms that are elastically deformable and that are disposed so as to be in contact with the restriction surface,
contact portions between respective pressing arms and the restriction surface are disposed with spacing between each other;
a pressing portion has a fixation portion that is fixed to the mounting surface, and
the pressing arms and the fixation portion are disposed such that a radial line that extends from a center of the magnetic circuit and on which the fixation portion of the pressing portion is positioned does not overlap radial lines that extend from the center of the magnetic circuit and on which respective pressing arms are positioned.

### Claim 2 (depends on 1)

The speaker according to claim 1, wherein:
the magnetic circuit holder is configured such that the magnetic circuit is inserted rearward into the magnetic circuit holder and is fixed in the magnetic circuit holder.

### Claim 3 (depends on 1)

The speaker according to claim 1, wherein:
the pressing arms are integrally formed with the pressing portion.

### Claim 4 (depends on 1)

The speaker according to claim 1, wherein:
the restriction surface is positioned frontward relative to the mounting surface, and
a step is produced between the restriction surface and the mounting surface.

### Claim 5 (depends on 1)

The speaker according to claim 1, wherein:
the pressing portion is formed separately from the frame.

### Claim 6 (depends on 1)

The speaker according to claim 1, wherein:
the pressing portion is formed integrally with the frame.

### Claim 7 (depends on 5)

The speaker according to claim 5, wherein:
a damper support member to which an outer peripheral portion of a damper that supports the diaphragm is fixed is formed separately from the frame, and
the pressing portion is interposed between the mounting surface and the damper support member.

### Claim 8 (depends on 5)

The speaker according to claim 5, wherein:
a damper support member to which an outer peripheral portion of a damper that supports the diaphragm is fixed is formed separately from the frame, and
the pressing portion is formed integrally with the damper support member.

### Claim 9 (depends on 6)

The speaker according to claim 6, wherein:
the frame has a diaphragm support member that supports the diaphragm and a magnetic circuit holder member that holds the magnetic circuit, and
the pressing portion is formed integrally with the diaphragm support member.

### Claim 10 (depends on 5)

The speaker according to claim 5, wherein:
the frame has a diaphragm support member that supports the diaphragm and a magnetic circuit holder member that holds the magnetic circuit, and
the pressing portion is interposed between the mounting surface and the diaphragm support member.

### Claim 11

A speaker comprising:
a frame;
a diaphragm supported by the frame so as to enable the diaphragm to vibrate;
a coil that drives the diaphragm to vibrate; and
a magnetic circuit that is positioned rearward relative to the diaphragm and applies a magnetic field to the coil, wherein:
the frame has a magnetic circuit holder in which the magnetic circuit is held,
the magnetic circuit has a restriction surface that faces frontward,
the magnetic circuit holder has a mounting surface that faces frontward,
a pressing portion has a screw-fixation portion that is screw-fixed to the mounting surface, the pressing portion being integrally formed with pressing arms that are elastically deformable and that are disposed so as to be in contact with the restriction surface,
contact portions between respective pressing arms and the restriction surface are disposed with spacing between each other, and
the pressing arms and the screw-fixation portion are disposed such that a radial line that extends from a center of the magnetic circuit and on which the screw-fixation portion of the pressing portion is positioned does not overlap radial lines that extend from the center of the magnetic circuit and on which respective pressing arms are positioned.

### Claim 12 (depends on 11)

The speaker according to claim 11, wherein:
the magnetic circuit holder is configured such that the magnetic circuit is inserted rearward into the magnetic circuit holder and is fixed in the magnetic circuit holder.

### Claim 13 (depends on 11)

The speaker according to claim 11, wherein:
the restriction surface is positioned frontward relative to the mounting surface, and
a step is produced between the restriction surface and the mounting surface.

### Claim 14 (depends on 11)

The speaker according to claim 11, wherein:
the pressing portion is formed separately from the frame.

### Claim 15 (depends on 11)

The speaker according to claim 11, wherein:
the pressing portion is formed integrally with the frame.

### Claim 16 (depends on 14)

The speaker according to claim 14, wherein:
a damper support member to which an outer peripheral portion of a damper that supports the diaphragm is fixed is formed separately from the frame, and
the pressing portion is interposed between the mounting surface and the damper support member.

### Claim 17 (depends on 14)

The speaker according to claim 14, wherein:
a damper support member to which an outer peripheral portion of a damper that supports the diaphragm is fixed is formed separately from the frame, and
the pressing portion is formed integrally with the damper support member.

### Claim 18 (depends on 15)

The speaker according to claim 15, wherein:
the frame has a diaphragm support member that supports the diaphragm and a magnetic circuit holder member that holds the magnetic circuit, and
the pressing portion is formed integrally with the diaphragm support member.

### Claim 19 (depends on 14)

The speaker according to claim 14, wherein:
the frame has a diaphragm support member that supports the diaphragm and a magnetic circuit holder member that holds the magnetic circuit, and
the pressing portion is interposed between the mounting surface and the diaphragm support member.