Speaker

Patent metadata

Field	Value
Publication number	US-10820113-B2
Application number	US-201916525576-A
Country	US
Kind code	B2
Filing date	Jul 30, 2019
Priority date	Aug 4, 2018
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

The speaker provided by the present invention includes a magnetic circuit system. The magnetic circuit system includes an upper magnetic conductive plate, and a lower magnetic conductive plate. The magnet includes a first magnet mounted on a center of the lower magnetic conductive plate and facing the diaphragm, and a second magnet mounted on the lower magnetic conductive plate and surrounding the first magnet. The upper magnetic conductive plate includes a first horizontal portion engaging with the second magnet, and a first oblique portion extending obliquely from the first horizontal portion. The speaker further includes a suspension sandwiched between the upper magnetic conductive plate and the second magnet for improving the stability of the vibration of the diaphragm and the balance of the vibration, and thus improves the power of speaker.

First claim

What is claimed is:

1. A speaker, comprising:
a vibration system including a diaphragm and a coil assembly for driving the diaphragm to vibrate along a vibration direction;
a suspension for supporting the coil assembly;
a magnetic circuit system including:
a magnetic conductive assembly having a upper conductive plate adjacent to the diaphragm and a lower magnetic conductive plate away from the diaphragm;
a magnet having a first magnet facing the diaphragm and mounted on a center of the lower magnetic conductive plate, and a second magnet mounted on the lower magnetic conductive plate and keeping a distance from the first magnet;
the upper magnetic conductive plate including a first horizontal portion engaging with the second magnet and a first oblique portion extending from an inner edge of the first horizontal toward the diaphragm and at the same time toward the coil assembly;
a receiving space formed by the magnetic conductive assembly and the second magnet for receiving the suspension and the coil assembly therein.

2. The speaker as described in claim 1 , wherein the second magnet includes a first end surface adjacent to the first horizontal portion, a second end surface adjacent to the lower magnetic conductive plate, and an inner surface adjacent to the first magnet for connecting the first end surface to the second end surface, the inner surface extends from an inner edge of the first end surface toward the lower magnetic conductive plate and at the same time toward the first magnet, the first end surface connects to the first horizontal portion.

3. The speaker as described in claim 2 , wherein the suspension includes a first fastening portion, a second fastening portion, and a connecting portion connecting between the first and second fastening portions, the first fastening portion connects to the coil assembly at an end away from the diaphragm, and the second fastening portion is sandwiched between the first horizontal portion and the second magnet.

4. The speaker as described in claim 3 , wherein the first fastening portion of the suspension extends to the second fastening portion along a waved path.

5. The speaker as described in claim 3 , wherein the first horizontal portion includes a first lower surface adjacent to the first end surface, a first upper surface opposite to the first lower surface, and a first fastening slot recessed from the first lower surface toward the first upper surface, and/or the second magnet includes a second fastening slot recessed from the first end surface toward the second end surface, and the suspension is fixed by the first fastening slot and/or the second fastening slot.

6. The speaker as described in claim 3 , wherein the coil assembly includes a coil frame connected to the diaphragm and a coil wire wound around the coil frame, the coil frame surrounds a part of the first magnet.

7. The speaker as described in claim 6 , wherein the first horizontal portion has a projection along a direction perpendicular to the vibration direction at least partially locates on the coil wire.

8. The speaker as described in claim 1 , further including a pole plate attached to the first magnet, and the pole plate has a projection along the direction perpendicular to the vibration direction at least partially locates on the first horizontal portion.

Assignees

• Aac Technologies Pte Ltd

Inventors

• Song Wei

Classifications

• H04R9/025 Primary

  Magnetic circuit · CPC title

• H04R9/06 Primary

  Loudspeakers · CPC title

• H01F7/0289

  Transducers, loudspeakers, moving coil arrangements · CPC title

• H01F7/126

  Supporting or mounting · CPC title

• H01F7/081

  Magnetic constructions · CPC title