Speaker

Patent metadata

Field	Value
Publication number	US-10924865-B2
Application number	US-201916526940-A
Country	US
Kind code	B2
Filing date	Jul 30, 2019
Priority date	Aug 3, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

The present disclosure provides a speaker including a frame having an accommodating space, a vibration system and a magnetic circuit system that are accommodated in the accommodating space. The vibration system includes a first diaphragm configured to vibrate and produce sound, a voice coil located below the first diaphragm and configured to drive the first diaphragm to vibrate and produce sound, a flexible circuit board electrically connected to the voice coil and elastically supporting the voice coil, and a second diaphragm fixed to the flexible circuit board. The flexible circuit board includes a first fixing portion connected to the voice coil, a second fixing portion disposed opposite to and separately from the first fixing portion, and an elastic arm connecting the first fixing portion and the second fixing portion. An orthogonal projection of the elastic arm toward the second diaphragm is partially located within a range of the second diaphragm.

First claim

What is claimed is:

1. A speaker, comprising a frame having an accommodating space, a vibration system and a magnetic circuit system that are accommodated in the accommodating space, wherein the vibration system comprises a first diaphragm configured to vibrate and produce sound, a voice coil located below the first diaphragm and configured to drive the first diaphragm to vibrate and produce sound, a flexible circuit board electrically connected to the voice coil and elastically supporting the voice coil, and a second diaphragm fixed to the flexible circuit board, wherein the flexible circuit board comprises a first fixing portion connected to the voice coil, a second fixing portion disposed opposite to and separately from the first fixing portion and connected to the second diaphragm, and an elastic arm connecting the first fixing portion and the second fixing portion, wherein an orthogonal projection of the elastic arm toward the second diaphragm is partially located within a range of the second diaphragm, wherein the elastic arm comprises a first torque arm reciprocally bent from two ends of the first fixing portion toward the second fixing portion, a second torque arm bent and extending from two ends of the second fixing portion toward the first fixing portion, and a third torque arm connecting the first torque arm and the second torque arm and bent in an arc shape, wherein orthogonal projections of the first torque arm and the third torque arm toward the second diaphragm are completely located within the range of the second diaphragm and an orthogonal projection of the second torque arm toward the second diaphragm is located outside the range of the second diaphragm.

2. The speaker according to claim 1 , wherein the first torque arm, the second torque arm, and the third torque arm are integrally formed, and form a closed structure together with the first fixing portion and the second fixing portion.

3. The speaker according to claim 1 , wherein the second diaphragm comprises a fixing portion fixedly connected to the first fixing portion, a connecting portion disposed separately from the fixing portion and connected to the second fixing portion, and a folded ring portion connecting the fixing portion and the connecting portion, wherein the elastic arm and the folded ring portion are disposed separately from each other.

4. The speaker according to claim 3 , wherein the magnetic circuit system comprises a yoke fixedly connected to the frame, a main magnetic steel assembled to the yoke, a main pole core attached to a surface of the main magnetic steel, an auxiliary magnetic steel disposed around the main magnetic steel, and an auxiliary pole core attached to the auxiliary magnetic steel, wherein the main magnetic steel and the auxiliary magnetic steel are separated from each other to form a magnetic gap, and the voice coil is suspended in the magnetic gap.

5. The speaker according to claim 4 , wherein the auxiliary pole core is fixedly connected to the frame, the auxiliary pole core comprises a body portion connected to the auxiliary magnetic steel, an extended portion extending from two ends of the body portion toward a direction away from the body portion, and a step portion bent and extending from one end of the extended portion away from the body portion toward the auxiliary magnetic steel, wherein the second torque arm is disposed in parallel to and separately from the extended portion, and the second fixing portion is fixedly connected to the step portion.

6. The speaker according to claim 5 , wherein the first fixing portion is sandwiched between the fixing portion and the voice coil, and the second fixing portion is sandwiched between the connecting portion and the step portion.

Assignees

• Aac Technologies Pte Ltd

Inventors

• Song Wei
• Wu Shuwen
• Zhang Fan

Classifications

• H04R1/06 Primary

  Arranging circuit leads; Relieving strain on circuit leads · CPC title

• H04R9/025

  Magnetic circuit · CPC title

• H04R2499/11

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

• H04R2307/207

  Shape aspects of the outer suspension of loudspeaker diaphragms · CPC title

• H04R7/20

  Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands · CPC title