Speaker includes a second fixing arm of an elastic supporting member sandwiched between two independently controlled voice coils

Patent metadata

Field	Value
Publication number	US-11202154-B2
Application number	US-202016935181-A
Country	US
Kind code	B2
Filing date	Jul 21, 2020
Priority date	Jul 22, 2019
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

The present invention provides a speaker having a vibrating system and a magnetic circuit system for driving the vibrating system to vibrate and sound. The magnetic circuit system has magnetic gap. The vibrating system includes vibrating assembly and voice coil assembly connected to the vibrating assembly, the voice coil assembly is inserted into the magnetic gap. The magnetic circuit system has a magnetic line concentrating area in the magnetic gap. The voice coil assembly includes a first voice coil connected to the vibrating assembly and a second voice coil arranged on the first voice coil at a side away from the vibrating assembly. if in the magnetic line concentrating area locates only the first voice coil, an electric signal is input only to the first voice coil; if in the magnetic line concentrating area locates only the second voice coil, electric signal is input only to the second voice coil.

First claim

What is claimed is:

1. A speaker, comprising a vibrating system and a magnetic circuit system for driving the vibrating system to vibrate and generate sound, wherein,
the magnetic circuit system has a magnetic gap, the vibrating system comprises a vibrating assembly and a voice coil assembly connected to the vibrating assembly for driving the vibrating assembly to vibrate, the voice coil assembly is inserted into the magnetic gap;
the magnetic circuit system has a magnetic line concentrating area in the magnetic gap, the voice coil assembly comprising a first voice coil connected to the vibrating assembly and a second voice coil connected to the first voice coil at a side away from the vibrating assembly;
if the first voice coil located in the magnetic line concentrating area, an electric signal is input only to the first voice coil;
if the second voice coil located in the magnetic line concentrating area, an electric signal is input only to the second voice coil,
the speaker further comprises an elastic supporting member for elastically supporting the voice coil assembly, the elastic supporting member comprises a first fixing arm connected to a fixed part of the speaker, a second fixing arm connected to the voice coil assembly, and an elastic arm connected between the first fixing arm and the second fixing arm, the second fixing arm is sandwiched between the first voice coil and the second voice coil, a thickness of the second fixing arm adjusts a distance between the first voice coil and the second voice coil for adjusting a BL curve of the first voice coil and a BL curve of the second voice coil.

2. The speaker according to claim 1 , wherein the magnetic circuit system includes a magnetic bowl and a magnet assembly fixed in the magnetic bowl and forming the magnetic gap with the magnetic bowl; the magnet assembly comprises a magnet and a pole plate stacked on the magnet, the pole plate includes a first surface connected to the magnet and a second surface arranged opposite to the first surface, an area of the magnetic gap located between a plane where the first surface is located and another plane where the second surface is located is the magnetic line concentrating area.

3. The speaker according to claim 1 , wherein the magnetic circuit system comprises a main magnet assembly and an auxiliary magnet assembly spaced apart from the main magnet assembly and forming the magnetic gap; the main magnet assembly includes a first main magnet and a main pole plate stacked on the first magnet, the auxiliary magnet assembly includes two first auxiliary magnets symmetrically arranged on two opposite sides of the first main magnet and an auxiliary pole plate stacked on the first auxiliary magnets; a plane connecting an upper surface of the main pole plate with an upper surface of the auxiliary pole plate is defined as a first plane, another plane connecting a lower surface of the main pole plate with a lower surface of the auxiliary pole plate is defined as a second plane, an area of the magnetic gap located between the first plane and the second plane is the magnetic line concentrating area.

4. The speaker according to claim 3 , wherein the main magnet assembly further comprises a second main magnet arranged on the main pole plate at a side away from the first main magnet, the auxiliary magnet assembly further comprises a second auxiliary magnet arranged on the auxiliary pole plate at a side away from the first auxiliary magnet; the corresponding ends of the first main magnet and the second main magnet have the same polarity, the corresponding ends of the first auxiliary magnet and the second auxiliary magnet have the same polarity, and the polarity of the corresponding ends of the first main magnet and the second main magnet is opposite to the polarity of the corresponding ends of the first auxiliary magnet and the second auxiliary magnet.

5. The speaker according to claim 3 , wherein the speaker further comprises a frame for receiving the vibrating system and the magnetic circuit system; the first fixing arm of the elastic supporting member is connected to the auxiliary pole plate or the frame.

6. The speaker according to claim 5 , wherein the speaker has two elastic supporting members, the voice coil assembly has a rectangular structure with rounded corners, the two first auxiliary magnets are arranged on two sides of the voice coil assembly corresponding to a long axis of the voice coil assembly, and the two elastic supporting members are arranged on two sides of the voice coil assembly corresponding to a short axis of the voice coil assembly.

7. The speaker according to claim 6 , wherein the auxiliary pole plate has an annular shape, the auxiliary pole plate comprises two first pole plate portions each opposite to the corresponding first auxiliary magnet and two second pole plate portions sandwiched between the two first pole plate portions; the first fixing arm of each elastic supporting member is connected to one of the second pole plate portions.

8. The speaker according to claim 1 , wherein the elastic supporting member is a flexible circuit board, the first voice coil and the second voice coil are electrically connected to the elastic supporting member.

9. The speaker according to claim 1 , wherein the vibrating assembly comprises an annular vibrating diaphragm and a dome arranged on the inner side of the annular vibrating diaphragm, and the first voice coil is connected to the annular vibrating diaphragm.

10. The speaker according to claim 1 , wherein a height of the first voice coil is equal to a height of the second voice coil.

11. The speaker according to claim 1 , wherein a thickness of the first voice coil is equal to a thickness of the second voice coil.

Assignees

• Aac Technologies Pte Ltd

Inventors

• Pan Kaitai
• Huang Xingzhi
• Wang Chao
• Xu Bin
• Zhang Henglizi
• Ye Lijian
• Hui Yao
• Shan Feng
• Zhang Zijie

Classifications

• H04R9/045

  Mounting (H04R9/043 takes precedence) · CPC title

• H04R2209/041

  Voice coil arrangements comprising more than one voice coil unit on the same bobbin · CPC title

• H04R9/046

  Construction · CPC title

• H04R9/06

  Loudspeakers · CPC title

• H04R9/025 Primary

  Magnetic circuit · CPC title