Miniature sounder

Patent metadata

Field	Value
Publication number	US-2017347201-A1
Application number	US-201715417130-A
Country	US
Kind code	A1
Filing date	Jan 26, 2017
Priority date	May 26, 2016
Publication date	Nov 30, 2017
Grant date	—

Abstract

Some embodiments of the present invention provide miniature sounder which includes a frame and a vibration system and a magnetic path system fixedly connected to the frame. The magnetic path system includes a lower clamping board, a primary magnet disposed on the lower clamping board, secondary magnets disposed on the lower clamping board and arranged around the primary magnet, and a cushion provided on the lower clamping board and located outside the secondary magnets, a gap being provided between two adjacent secondary magnets. The vibration system includes a voice diaphragm, a voice coil which drives the voice diaphragm to vibrate and generate a sound, and a vibrating diaphragm which elastically supports the voice coil. The vibrating diaphragm includes a first connecting portion connected to the voice coil, a second connecting portion connected to the cushion, and a corrugated rim connecting the first connecting portion and the second connecting portion.

First claim

What is claimed is:

1 . A miniature sounder, comprising:
a frame and a vibration system and a magnetic path system fixedly connected to the frame; wherein the magnetic path system comprises a lower clamping board, a primary magnet disposed on the lower clamping board, secondary magnets disposed on the lower clamping board and arranged around the primary magnet, and a cushion provided on the lower clamping board and located outside the secondary magnets, a gap being provided between two adjacent secondary magnets; wherein the vibration system comprises a voice diaphragm, a voice coil which is located below the voice diaphragm and drives the voice diaphragm to vibrate and generate a sound, and a vibrating diaphragm which elastically supports the voice coil; wherein the vibrating diaphragm comprises a first connecting portion connected to the voice coil, a second connecting portion connected to the cushion, and a corrugated rim connecting the first connecting portion and the second connecting portion; wherein the corrugated rim is disposed in the gap, and the corrugated rim comprises successively a first protrusion, a second protrusion, and a third protrusion, the second protrusion being located between the first protrusion and the third protrusion, and a protruding direction of the first protrusion being the same as that of the third protrusion and being opposite to that of the second protrusion.

2 . The miniature sounder according to claim 1 , wherein the secondary magnets are each provided with an extended portion extending to a position over the cushion, and the second connecting portion is sandwiched between the cushion and the extended portion.

3 . The miniature sounder according to claim 1 , wherein the secondary magnets comprise a first secondary magnet connected to the lower clamping board and a second secondary magnet superimposed on the first secondary magnet, the second secondary magnet extends to a position over the cushion, and the second connecting portion is sandwiched between the cushion and the second secondary magnet.

4 . The miniature sounder according to claim 1 , wherein the cushion is made of a magnetically permeable material.

5 . The miniature sounder according to claim 1 , wherein the cushion is formed by extending from the lower clamping board and constructs an integral structure with the lower clamping board.

Assignees

• Linghu Ronglin
• Xiao Bo
• Aac Technologies Pte Ltd

Inventors

• Linghu Ronglin
• Xiao Bo

Classifications

• H04R9/06 Primary

  Loudspeakers · CPC title

• H04R7/18

  at the periphery · CPC title

• H04R7/14

  corrugated, pleated or ribbed · CPC title

• H04R9/025

  Magnetic circuit · CPC title

• H04R9/043

  Inner suspension or damper, e.g. spider (outer suspension or surround H04R7/16) · CPC title