Speaker

Patent metadata

Field	Value
Publication number	US-10674279-B1
Application number	US-201916706742-A
Country	US
Kind code	B1
Filing date	Dec 7, 2019
Priority date	Dec 29, 2018
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

The present invention discloses a speaker having a frame, a vibrating system and a magnetic circuit system. The vibrating system has a vibrating diaphragm, a voice coil and an elastic supporting assembly. The magnetic circuit system has a main magnet, a secondary magnet located on two opposite sides of the main magnet, a magnetic plate stacked on the secondary magnet and spaced away from the elastic supporting assembly, and an auxiliary magnet. The magnetic plate has a main body and a supporting portion extending from the main body towards the main magnet and spaced away from the main magnet. The auxiliary magnet is fixed on the supporting portion at the sides away from the vibrating diaphragm and spaced away from the main magnet. The speaker of the present invention has advantages of good reliability and excellent acoustic performance.

First claim

What is claimed is:

1. A speaker, comprising a frame, a vibrating system and a magnet circuit system with a magnetic gap both accommodated in the frame,
wherein, the vibrating system comprises a vibrating diaphragm fixed on the frame, a voice coil inserted into the magnetic gap for driving the vibrating diaphragm, and an elastic supporting assembly fixed on the frame and connected to the voice coil at an end away from the vibrating diaphragm;
the magnetic circuit system comprises a yoke fixed on the frame, a main magnet fixed on the yoke, a secondary magnet located on two opposite sides of the main magnet and spaced away from the main magnet for forming the magnetic gap, and a magnetic plate stacked on the secondary magnet and spaced away from the elastic supporting assembly;
an orthographic projection of the elastic supporting assembly on the yoke along a vibrating direction of the vibrating diaphragm, and an orthographic projection of the secondary magnet on the yoke along the vibrating direction of the vibrating diaphragm at least do not overlap partially;
the magnetic plate includes a main body in an annular shape stacked on the secondary magnet and a supporting portion extending from two opposite sides of the main body towards the main magnet; the supporting portion is spaced away from the main magnet;
the magnet circuit system further includes an auxiliary magnet fixed on the supporting portion and spaced away from the main magnet; the auxiliary magnet is located on the supporting portion at a side away from the vibrating diaphragm and facing to the elastic supporting assembly.

2. The speaker according to claim 1 , wherein an orthographic projection of the auxiliary magnet on the yoke along the vibrating direction of the vibrating diaphragm, and the orthographic projection of the secondary magnet on the yoke along the vibrating direction of the vibrating diaphragm do not overlap each other.

3. The speaker according to claim 1 , where in the supporting portion includes a first wall bent and extended from the main body towards the vibrating diaphragm and a second wall bent and extended from the first wall at an end close to the vibrating diaphragm towards the main magnet; the auxiliary magnet is fixed on the second wall at a side away from the vibrating diaphragm.

4. The speaker according to claim 3 , where in the auxiliary magnet attaches on the first wall at a side close to the main magnet.

5. The speaker according to claim 1 , wherein both the main magnet and the auxiliary magnet are magnetized along the vibrating direction of the vibrating diaphragm, and a magnetic pole of the main magnet is arranged opposite to a magnetic pole of the auxiliary magnet.

6. The speaker according to claim 5 , where in a magnetic pole of the auxiliary magnet close to an end of the vibrating diaphragm is S pole, and a magnetic pole of the auxiliary magnet close to the elastic support assembly is N pole.

7. The speaker according to claim 1 , wherein the main magnet is magnetized along the vibrating direction of the vibrating diaphragm, and the auxiliary magnet is magnetized along a direction perpendicular to the vibrating direction of the vibrating diaphragm.

8. The speaker according to claim 7 , where in a magnetic pole of the auxiliary magnet close to an end of the main magnet is S pole, and a magnetic pole of the auxiliary magnet away from an end of the main magnet is N pole.

9. The speaker according to claim 1 , wherein the main magnet is rectangular, and the secondary magnet is positioned at two opposite sides along a longitudinal direction of the main magnet, and the elastic supporting assembly is located at two opposite sides along a lateral direction of the main magnet, the auxiliary magnet is located at two opposite sides along the lateral direction of the main magnet.

10. The speaker according to claim 1 , wherein the elastic supporting assembly includes an elastic member and an auxiliary vibrating diaphragm connected to the elastic member at a side away from the vibrating diaphragm, wherein one end of the elastic member is fixed on the frame, and the other end of the elastic member is fixed on the voice coil at an end away from the vibrating diaphragm.

11. The speaker according to claim 10 , wherein the elastic member is a flexible circuit board, and the voice coil is electrically connected to the elastic member.

Assignees

• Aac Technologies Pte Ltd

Inventors

• Liu Xiaodong
• Zhang Long

Classifications

• H04R7/18

  at the periphery · CPC title

• H04R9/06 Primary

  Loudspeakers · CPC title

• H04R2400/11

  Aspects regarding the frame of loudspeaker transducers · CPC title

• H04R2499/11

  Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's · CPC title

• H04R9/027

  Air gaps using a magnetic fluid · CPC title