CN202551344U

CN202551344U - Bone-conduction microphone

Info

Publication number: CN202551344U
Application number: CN2012201310872U
Authority: CN
Inventors: 许王华; 贺晶
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Optoelectronic Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Microtech Changzhou Co Ltd; AAC Optoelectronic Changzhou Co Ltd
Priority date: 2012-03-30
Filing date: 2012-03-30
Publication date: 2012-11-21
Anticipated expiration: 2022-03-30

Abstract

The utility model relates to a bone-conduction microphone. The bone-conduction microphone comprises a magnet yoke, as well as a magnetic steel and a coil which are assembled on the magnet yoke, a shrapnel held on the magnet yoke and a quality block which is suspended above the magnetic steel and the coil, wherein the shrapnel comprises a first fixed part held on the quality block, a deformation part which is stretched from the first fixed part, is positioned on the outer side of the long side wall of the quality block and is used for generating elastic deformation, and a second fixing part which is extended from the deformation part and is held on the magnet yoke. The bone-conduction microphone provided by the utility model has the advantages that the structure is simple, and the sensitivity is high.

Description

Bone-conduction microphone

[technical field]

The utility model relates to a kind of transducer, relates in particular to the bone-conduction microphone in a kind of transducer.

[background technology]

The receiver that is used for various communication apparatus at present is air-conduction type; Promptly acoustic pressure is acted on acceptor's the ear-drum through air transmitted; By ear bones, the cochlea of ear-drum through the people, sound imports people's brain into the most at last. and the subject matter of air-conduction type receiver is, must it is buckled on the auricle (earphone) or get lodged in duct mouth (earplug) during use; Like this; When the people puts on earphone or earplug, just can not listen attentively to effectively, analyze acoustic information from surrounding environment, make some should hear that the service condition that must understand environmental information of living in again from the communication equipment voice signal can not satisfy.

And existing bone-conduction microphone; Between mass and yoke, shell fragment is set, and shell fragment one end is immobilizated in the mass end, an other end is immobilizated on the yoke near above-mentioned mass end; Cause the deformations that produces elastic force very short like this, make bone-conduction microphone sensitivity not high

Therefore, be necessary a kind of new bone-conduction microphone to be provided to the problems referred to above.

[utility model content]

The purpose of the utility model is to design a kind of simple in structure, highly sensitive bone-conduction microphone.

A kind of bone-conduction microphone; Comprise yoke, assembly in the magnet steel and the coil of said yoke, be immobilizated in the shell fragment of said yoke and be suspended in the mass of said magnet steel and coil top through shell fragment, said shell fragment comprises first fixed part that is immobilizated in mass, is positioned at second fixed part that the mass long side wall outside is other and be used to produce elastically-deformable deformations and extend and be immobilizated in yoke from said deformations from said first fixed part is extended.

Preferably, said yoke comprises diapire, and said diapire derives and is positioned at first middle boss of diapire and second boss that lays respectively at the diagonal two ends of diapire, and said coil is sheathed on this first boss, and said second fixed part is immobilizated in this second boss.

Preferably, body in the middle of said mass comprises and the recess step that is positioned at two ends, said first fixed part is immobilizated in said recess step upper surface.

Preferably, said recess step derives rib each other dorsad along the body short-axis direction.

Preferably, said first fixed part and second fixed part are individually fixed in the recess step and second boss through the mode of laser spot welding.

Preferably, the quantity of said shell fragment is two and is the L type that deformations is parallel to mass long side wall and is provided with at interval.

Preferably, said magnet steel is positioned at two short end of yoke, and is provided with the gap between said magnet steel and the said recess step.

Preferably, said bone-conduction microphone also comprises the circuit board that is positioned at said yoke below, and said coil is provided with lead-in wire, and said lead-in wire extends to this circuit board along yoke surfaces, also covers one deck on the said lead-in wire and plays glue layer fixing and insulating effect.

Preferably, second weld part that said circuit board is provided with first weld part and is provided with at interval and electrically connects with said first weld part, the said first weld part welding lead, said second weld part welding outer lead.

Preferably, the quantity of said first weld part is two and is provided with at interval each other that the quantity of said second weld part is two and is provided with at interval each other.

The beneficial effect of the utility model is: this bone-conduction microphone is simple in structure, and the deformations length that produces elastic force is long, thereby has improved sensitivity widely.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of bone-conduction microphone;

Fig. 2 is the stereogram of bone-conduction microphone shown in Figure 1;

Fig. 3 is the cutaway view along A-A line among Fig. 2;

Fig. 4 is that the single glue layer of bone-conduction microphone shown in Figure 2 separates stereogram.

[embodiment]

Below in conjunction with accompanying drawing and execution mode the utility model is described further.

As shown in Figure 1; The utility model provides a kind of bone-conduction microphone 1, comprises magnet steel 11 and coil 12 on said yoke 10 of yoke 10, assembly, is positioned at the circuit board 13 of said yoke 10 belows, the mass 14 that is immobilizated in the shell fragment 15 of yoke 10 and is suspended in said magnet steel 11 and coil 12 tops through shell fragment 15.The quantity of said shell fragment 15 is two and is the L type, and it comprises first fixed part 151 that is immobilizated in mass 14, other and be used to produce elastically-deformable deformations 152 and extend and be immobilizated in second fixed part 153 of yoke 10 from said deformations 152 from the extended mass 14 long side walls outside that is positioned at of said first fixed part 151.Said coil 12 has lead-in wire 121; Said lead-in wire 121 electrically connects with circuit board 13, and like this, the outside ac signal that imports conducts to coil 12; The permanent magnetic field that produces at the magnet steel 11 by two short end that are arranged in yoke 10 produces alternating magnetic field; Thereby make the mass 14 that suspends through shell fragment 15 produce vibration, the signal of telecommunication so is transformed into force signal, imports people's brain into through skeleton.

In conjunction with Fig. 1 and shown in Figure 3, the said yoke 10 that plays the magnetic conduction effect comprises diapire 101, and said diapire 101 derives first boss 102 and two second boss 103 that lay respectively at the diagonal two ends of diapire that is positioned at diapire 101 centres.Said coil 12 is sheathed on this first boss 102, and this first boss 102 plays the effect of the magnetic force that increases coil 12 generations, and second fixed part 153 of said shell fragment 15 is immobilizated in this second boss, 103 upper surfaces through the mode of laser spot welding.

Body 141 in the middle of said mass 14 comprises and the recess step 142 that is positioned at two ends are provided with gap 17 between said recess step 142 and the magnet steel below it 11, and the below headspace when this gap 17 is shell fragment 15 vibrations is referring to shown in Figure 3.Combine shown in Figure 1ly again, first fixed part 151 of said shell fragment 15 is immobilizated in said recess step 142 upper surfaces through the mode of laser spot welding.Said recess step 142 derives rib 1421 each other dorsad along body 141 short-axis directions, and these rib 1421 bearing of trends deviate from second boss 103 that is positioned at bone-conduction microphone 1 same short end with it.This rib 1421 has increased the contact area with second fixed part 151, the stress when having disperseed shell fragment 15 bendings.Said body 141 is provided with the through hole 1411 of perforation.

As depicted in figs. 1 and 2; Said deformations 152 is parallel to mass 14 long side walls and is provided with at interval; The shell fragment 15 of this spline structure, its length that produces elastically-deformable deformations 152 increases greatly, thereby has promoted the support arm of force of mass 14; Mass 14 is more prone to vibration, and the sensitivity of bone-conduction microphone is promoted significantly.

As shown in Figure 4; Said lead-in wire 121 extends to this circuit board 13 along yoke 10 surfaces; Also cover one deck on the said lead-in wire 121 and play glue layer 16 fixing and insulating effect; Second weld part 132 that said circuit board 13 is provided with first weld part 131 and is provided with and electrically connects at interval with said first weld part 131, said first weld part, 131 welding leads 121, said second weld part, 132 welding outer leads; The quantity of said first weld part 131 is two and is provided with at interval each other that the quantity of said second weld part 132 is two and is provided with at interval each other.

Above-described only is the preferred embodiments of the utility model; Should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the utility model creation design; Can also make improvement, but these all belong to the protection range of the utility model.

Claims

1. bone-conduction microphone; It is characterized in that; Comprise yoke, assembly in the magnet steel and the coil of said yoke, be immobilizated in the shell fragment of said yoke and be suspended in the mass of said magnet steel and coil top through shell fragment, said shell fragment comprises first fixed part that is immobilizated in mass, is positioned at second fixed part that the mass long side wall outside is other and be used to produce elastically-deformable deformations and extend and be immobilizated in yoke from said deformations from said first fixed part is extended.

2. bone-conduction microphone according to claim 1; It is characterized in that: said yoke comprises diapire; Said diapire derives and is positioned at first middle boss of diapire and second boss that lays respectively at the diagonal two ends of diapire; Said coil is sheathed on this first boss, and said second fixed part is immobilizated in this second boss.

3. bone-conduction microphone according to claim 2 is characterized in that: body in the middle of said mass comprises and the recess step that is positioned at two ends, said first fixed part is immobilizated in said recess step upper surface.

4. bone-conduction microphone according to claim 3 is characterized in that: said recess step derives rib each other dorsad along the body short-axis direction.

5. bone-conduction microphone according to claim 4 is characterized in that: said first fixed part and second fixed part are individually fixed in the recess step and second boss through the mode of laser spot welding.

6. according to claim 1 or 5 described bone-conduction microphones, it is characterized in that: the quantity of said shell fragment is two and is the L type that deformations is parallel to mass long side wall and is provided with at interval.

7. bone-conduction microphone according to claim 3 is characterized in that: said magnet steel is positioned at two short end of yoke, and is provided with the gap between said magnet steel and the said recess step.

8. according to claim 1 or 7 described bone-conduction microphones; It is characterized in that: said bone-conduction microphone also comprises the circuit board that is positioned at said yoke below; Said coil is provided with lead-in wire; Said lead-in wire extends to this circuit board along yoke surfaces, also covers one deck on the said lead-in wire and plays glue layer fixing and insulating effect.

9. bone-conduction microphone according to claim 8; It is characterized in that: second weld part that said circuit board is provided with first weld part and is provided with at interval and electrically connects with said first weld part; The said first weld part welding lead, said second weld part welding outer lead.

10. bone-conduction microphone according to claim 9 is characterized in that: the quantity of said first weld part is two and is provided with at interval each other that the quantity of said second weld part is two and is provided with at interval each other.