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CN1969590A - Magnets for transducers - Google Patents

Magnets for transducers Download PDF

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Publication number
CN1969590A
CN1969590A CNA2004800433303A CN200480043330A CN1969590A CN 1969590 A CN1969590 A CN 1969590A CN A2004800433303 A CNA2004800433303 A CN A2004800433303A CN 200480043330 A CN200480043330 A CN 200480043330A CN 1969590 A CN1969590 A CN 1969590A
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China
Prior art keywords
transducer
drive magnet
magnet
manufacturing
yoke
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Pending
Application number
CNA2004800433303A
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Chinese (zh)
Inventor
托马斯·爱德华·米勒
埃文·利亚马斯-扬
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Knowles Electronics LLC
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Knowles Electronics LLC
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Publication of CN1969590A publication Critical patent/CN1969590A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/041—Adaptation of stereophonic signal reproduction for the hearing impaired
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/01—Transducers used as a loudspeaker to generate sound aswell as a microphone to detect sound

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

The invention relates to a magnet arrangement for a transducer. A transducer suitable for use as a microphone or receiver in a hearing aid has a housing and a diaphragm disposed within the housing. Motor means operatively coupled to the diaphragm is also disposed within the housing. The motor apparatus includes a magnet apparatus having a yoke formed with a passage and a drive magnet disposed within the passage. The yoke has a saturation inductance greater than 1.5T and the drive magnet has a saturation inductance greater than 72kJ/m3And a coercivity of greater than 140 kA/m.

Description

The magnet apparatus that is used for transducer
Technical field
Present invention relates in general to available transducer in such as the listening device of hearing aids etc., more particularly, relate to the magnet apparatus that is used for transducer.
Background technology
In recent years, the hearing aids technology is fast-developing.Technological progress Continual Improvement in this field miniaturization, reception, comfortable wearing, useful life and the power efficiency of hearing aids.These lasting progress along with on the performance of ear-wearing type acoustic apparatus have proposed ever-increasing demand for the proper property that improves employed micro acoustic transducer.Known several different hearing aids types in the hearing aids industry: worm behind ear (BTE), inner ear type or full inner ear type (ITE), duct-type (ITC) and full duct-type (CTC).
In general, the listening device such as hearing aids etc. comprises microphone apparatus, amplifier and receiver (loud speaker) device.Microphone apparatus receives sound wave, and generates the signal of telecommunication of these sound waves of expression.Amplifier is accepted the signal of telecommunication, revises this signal of telecommunication, and the modified signal of telecommunication (for example, processing signals) is sent to acceptor device.Acceptor device becomes to be used to send to user's acoustic energy to the electrical signal conversion that increases again.
Known acceptor device comprises shell, armature, drive rod, a pair of magnet, vibrating membrane, drive coil, yoke, sound outlet, and electric terminal.The vibrating membrane setting in the enclosure, shell limits output cavity and motor cavity.Armature is arranged in the motor cavity, and has the executive component that comprises anchor portion and movable end.Armature is coupled to drive vibrating membrane by drive rod.Magnet structure with centre gangway is surrounded the movable end of armature, and provides permanent magnetic field in this passage.Drive coil is around the armature setting, and near magnet structure.
For magnetic flux is provided, magnet can be arranged in the yoke.Magnet can be by making such as the hard magnetic material of ferrite, magnet steel for instance.Yoke can be made by ferronickel (Nickel-Iron).The arrangement of this magnet apparatus (magnet-magnetic yoke structure) has several shortcomings.The hard magnetic material that uses in magnet has relatively low energy content usually, and it also needs certain thickness so that enough magnetic densities to be provided.And the overall dimensions of yoke must be set to enough greatly to avoid magnetic saturation.And the physical size of material has caused restriction to the size of acceptor device, makes its size be difficult to reduction.
Therefore, need a kind of low price, make simple and can narrow down to the transducer of relative reduced size, for example microphone or receiver.
Description of drawings
In order more fully to understand the disclosure, should be with reference to following detailed and accompanying drawing, wherein:
Fig. 1 is the cross-sectional view according to the transducer of embodiment of the present invention;
Fig. 2 is the cross-sectional view according to the transducer of embodiment of the present invention; And
Fig. 3 is the cross-sectional view according to the transducer of embodiment of the present invention.
Embodiment
Though the disclosure is easy to carry out various modifications and has alternate forms,, show certain embodiments by example in the accompanying drawings, and will describe these embodiment in detail at this.Yet, should be understood that the disclosure is not intended to limit the invention to described particular form, and in contrast, the present invention is intended to cover all modifications example, alternative example and the equivalent in the spirit and scope of the present invention that fall into the claims qualification.
Be to be further appreciated that, unless utilize statement " as used herein; term ' _ _ ' is restricted at this and means ... " or similar statement clearly to limit a term in this application, otherwise limit its implication literal or its ordinary meaning that exceeds of this term unintentionally clearly or impliedly, and this term should not be interpreted into the scope that is subject to any statement of being done based on (except the language of claim) in the application's any part.Just quote with regard to any term of quoting in the claim of the application's ending by the mode consistent in this application with single implication, do so only be for clear not allowing for the purpose of reader's muddle, rather than refer to that this claim term impliedly or otherwise is limited to this single implication.Unless word " device " and function and unreferenced any structure limits the claim key element by reference, the scope of any claim key element should based on the 6th section of 35 U.S.C. § 112 should be used for explain.
Fig. 1-2 illustration the cross-sectional view of transducer 100.Transducer 100 can be used as microphone, receiver or other this device, and can be used for such as hearing aids, inner ear type monitor, headphone, electronics hearing protection and very in the device of the acoustic speaker of small scale.Transducer 100 comprises the shell 102 with at least one sound outlet 104.Shell 102 can be a rectangle on cross section, has flat top portion 106, bottom 108 and sidewall 110,112.In alternative embodiment, shell 102 can adopt such as cylindrical, D shape, trapezoidal, roughly square or the various structures of any other desired geometry are made.In addition, the yardstick of shell 102 and size can change based on expection application, operating condition, demand assembly etc.Optional electric terminal 114 can be pasted to the sidewall 112 of shell 102 by bonding or any other suitable joint method.Transducer 100 can also comprise vibrating membrane 116, magnet apparatus 118 and the motor apparatus 124 of operationally coupling.
Magnet apparatus 118 comprises a pair of magnet 120, and so that enough electromagnetic flux density to be provided, described a pair of magnet 120 is engaged to yoke 122 regularly.Magnet apparatus 118 generally can form shape and the structure corresponding to shell 102, but also can form different shape and the size that meets different embodiment.Yoke 122 forms rectangular frame, and this rectangular frame has the central corridor or the passage of the encirclement portion of qualification, and magnet 120 is installed in this encirclement portion and is formed with air gap 140, with the electromagnetic flux of carrying magnet 120 and drive coil 130.
Motor apparatus 124 comprises armature 126, connecting rod or drive rod 128, drive coil 130, and goes between 132.Drive coil 130 and electric terminal 114 all are operatively engaged to lead-in wire 132.In other embodiments, connecting rod or drive rod 128 can be a jockey or a plurality of jockey.It will be appreciated by those skilled in the art that the principle and advantage of embodiment described herein all may be useful for all types receiver such as the receiver with U-shaped or E shape armature.
Vibrating membrane 116 and armature 126 all are operatively engaged to drive rod 128.In alternative embodiment, armature 126 can not utilize drive rod 128 to be pasted to vibrating membrane 116 by any other suitable joint method.In other embodiments, can use vibrating membrane, with the Enhanced Radiation Reduced Blast area and increase the output of acoustic signal of transducer 100 or the sensitivity at acoustic signal of transducer 100 more than one.Vibrating membrane 116 is shown as has one deck at least.Yet vibrating membrane 116 can utilize a plurality of layers.Armature 126 comprises anchor portion 126a and movable end 126b.The movable end 126b of armature 126 extends along drive coil 130 and magnet apparatus 118, and it is connected to vibrating membrane 116 by drive rod 128 again.The anchor portion 126a of armature 126 extends in the outside of drive coil 130 and in shell 102.As shown in Figure 1, the anchor portion 126a of armature 126 is pasted to shell by bonding or any other suitable joint method.In other embodiments, the anchor portion 126a of armature 126 can be pasted to the outside of yoke 122 by the mode near vibrating membrane 116 (as shown in Figure 2), to dwindle the overall dimensions of transducer 100.
Fig. 3 also illustration the magnet apparatus 118 and the structure of transducer 100.Magnet apparatus 118 comprises a pair of magnet 120 that is engaged to yoke 122 regularly.Magnet apparatus 118 is because of the high-energy sum of products high coercivity material of high pulsactor, high magnetic permeability and the low coercivity material and the magnet 120 of yoke 122, and presents high flux density under the small size situation.
Yoke 122 can be made by the soft magnetic material with high magnetic permeability and high pulsactor.For example, yoke 122 can be from Carpenter Technology Corporation by public vanadium ferro-cobalt (FeCoV) alloy that obtains of business name Permendur Hiperco 50A, or make by any similar material.In general, the material that forms yoke 122 should have greater than 1.5 and be preferably the pulsactor of at least 2.0 teslas (T), greater than about 10000 and be preferably more than about 75000 maximum permeability and less than the coercivity of 140 ampere per meter (A/m)s (A/m).
Magnet 120 can be made by having the rareearth magnetic material that improves magnetic characteristic, improvement intrinsic coercive force and improve the ceiling capacity product.For example, magnet 120 can be cobalt samarium (SmCo 5, Sm 2Co 17) alloy, ferro-boron neodymium (NdFeB) alloy, or make by any similar material.Utilize among the embodiment of cobalt samarium alloy one, magnet has high flux density, allows to dwindle the integral thickness of transducer 100 thus.Usually, the material of formation magnet 120 should have greater than about 72 and be preferably about 191 to every cubic metre of (kJ/m of about 422 kilojoules 3) energy product, greater than 1 and be preferably the pulsactor of about 1-1.5 tesla (T) and greater than 140 and be preferably about 690 to about 1040 (h CB, coercivity kA/m).
When transducer 100 is used as receiver, electric current from the expression input audio signal of electric terminal 114 is applied to drive coil 130, has generated corresponding alternating current (a.c.) magnetic flux (not shown) by armature 126, magnet 120 and yoke 122 from drive coil 130.And, from first side of magnet apparatus 118 (for example, the upper-part of magnet 120) to the upper-part of as shown in Figure 3 yoke 122, to second side (for example, the lower member of yoke 122) of magnet apparatus 118, to the lower member of as shown in Figure 3 magnet 120 and cross air gap 140 and generated corresponding direct current (d.c.) magnetic flux path 200.The movable end 126b of armature 126 vibrates in response to the electromagnetic force that magnetic flux 200 produced that is generated by magnet apparatus 118 and drive coil 130, and this causes the motion of drive rod 128 again.Vibrating membrane device 116 moves in response to the moving both vertically of armature movable end 126b that is driven by drive coil 130.Transducer 100 utilizes the correspondence motion of armature movable end 126b and vibrating membrane device 116, generates the output acoustic signal towards user's eardrum.Do the overall dimensions that the reduction acceptor device is provided like this and keep high efficiency advantage.
At these all lists of references of quoting, comprise publication, patent application and patent, all be incorporated into this, pointed out separately and specially to be incorporated into this by reference and to set forth on the whole at this as each list of references by reference to same content.
Use term " " and " described " and similarly refer in (particularly under the linguistic context in following claim) under the linguistic context that present invention is described, should be regarded as having contained odd number and plural number, unless otherwise carried out indicating or obviously contradicting with context at this.Quote number range at this and only be to fall into each independent method of writing a Chinese character in simplified form of quoting separately of value in this scope with opposing, unless otherwise indicate at this, and each independent value is merged in this specification, as having quoted it separately at this.All method described here can be carried out by any suitable order, unless otherwise indicate at this, or obviously contradict with context in other cases.Use only is to explain better the present invention, but not scope of the present invention is limited, unless claim has requirement in addition at these any and all examples that provide or formula language (for example, " as ") for example.Any language in this specification should not be regarded as indicating any enforcement any non-claim key element essential to the invention.
Described the preferred embodiments of the present invention at this, comprised that known being used to of inventor implement optimal mode of the present invention.Should be appreciated that illustrative embodiment only is exemplary, and should not be regarded as scope of the present invention is limited.

Claims (25)

1、一种换能器，该换能器包括：1. A transducer comprising: 用于所述换能器的外壳；a housing for said transducer; 振动膜，其可活动地设置在所述外壳内；a diaphragm movably disposed within the housing; 马达装置，其设置在所述外壳内，该马达装置包括可操作地耦合的固定线圈、与所述振动膜耦合的衔铁以及磁体装置，其中，所述磁体装置具有磁轭和高性能驱动磁体，所述磁轭被形成为包括通道并且具有大于约1.5T的饱和电感，所述驱动磁体设置在所述通道内并且具有大于约72kJ/m3的能量乘积和大于约140kA/m的矫顽磁性中的至少一个。a motor arrangement disposed within the housing, the motor arrangement comprising an operably coupled stationary coil, an armature coupled to the vibrating membrane, and a magnet arrangement, wherein the magnet arrangement has a yoke and a high performance drive magnet, The yoke is formed to include a channel and has a saturation inductance greater than about 1.5T, the drive magnet is disposed within the channel and has an energy product greater than about 72 kJ/ m and a coercivity greater than about 140 kA/m at least one of the 2、根据权利要求1所述的换能器，其中，所述衔铁和所述振动膜被耦合至一驱动连接部。2. The transducer of claim 1, wherein the armature and the diaphragm are coupled to a drive connection. 3、根据权利要求1所述的换能器，其中，所述磁轭具有约2.0T的饱和电感。3. The transducer of claim 1, wherein the yoke has a saturation inductance of about 2.0T. 4、根据权利要求1所述的换能器，其中，所述磁轭包括钴铁(FeCo)合金。4. The transducer of claim 1, wherein the yoke comprises a cobalt iron (FeCo) alloy. 5、根据权利要求1所述的换能器，其中，所述磁轭包括钒钴铁(FeCoV)合金。5. The transducer of claim 1, wherein the yoke comprises an iron-vanadium-cobalt (FeCoV) alloy. 6、根据权利要求1所述的换能器，其中，所述驱动磁体包括设置在所述通道内的第一驱动磁体和第二驱动磁体。6. The transducer of claim 1, wherein the drive magnet comprises a first drive magnet and a second drive magnet disposed within the channel. 7、根据权利要求1所述的换能器，所述驱动磁体具有大于约72kJ/m3的能量乘积、大于约1T的饱和电感以及大于约140kA/m的矫顽磁性。7. The transducer of claim 1, the drive magnet having an energy product greater than about 72 kJ/ m3 , a saturation inductance greater than about IT, and a coercivity greater than about 140 kA/m. 8、根据权利要求1所述的换能器，所述驱动磁体具有约191kJ/m3到约422kJ/m3的能量乘积。8. The transducer of claim 1, said drive magnet having an energy product of about 191 kJ/ m3 to about 422 kJ/ m3 . 9、根据权利要求1所述的换能器，所述驱动磁体具有约690kA/m到约1040kA/m的矫顽磁性。9. The transducer of claim 1, the drive magnet having a coercivity of about 690 kA/m to about 1040 kA/m. 10、根据权利要求1所述的换能器，其中，所述驱动磁体包括从由钴钐(SmCo)合金和硼铁钕(NdFeB)合金组成的合金组中选择的合金。10. The transducer of claim 1, wherein the drive magnet comprises an alloy selected from the group consisting of Samarium Cobalt (SmCo) alloy and Neodymium Iron Boron (NdFeB) alloy. 11、根据权利要求1所述的换能器，所述驱动磁体包括设置在所述通道的第一侧的第一驱动磁体和设置在所述通道的第二侧的第二驱动磁体，而所述衔铁以位于所述第一驱动磁体与所述第二驱动磁体之间的方式设置在所述通道内。11. The transducer of claim 1, said drive magnet comprising a first drive magnet disposed on a first side of said channel and a second drive magnet disposed on a second side of said channel, wherein said The armature is disposed within the channel between the first drive magnet and the second drive magnet. 12、根据权利要求1所述的换能器，其中，所述换能器是麦克风和接收器中的一种。12. The transducer of claim 1, wherein the transducer is one of a microphone and a receiver. 13、根据权利要求1所述的换能器，所述换能器适于在助听器、耳内式监听器、头戴式耳机、电子听力保护装置以及扬声器中的至少一种中使用。13. The transducer of claim 1, adapted for use in at least one of a hearing aid, an in-ear monitor, a headset, an electronic hearing protection device, and a speaker. 14、一种制造换能器的方法，该制造换能器的方法包括以下步骤：14. A method of manufacturing a transducer, the method of manufacturing a transducer comprising the following steps: 磁轭设置步骤，其设置具有通道和大于约1.5T的饱和电感的磁轭；a yoke setting step that sets a yoke having a channel and a saturated inductance greater than about 1.5T; 驱动磁体设置步骤，其在所述通道内设置驱动磁体，所述驱动磁体具有大于约72kJ/m3的能量乘积和大于约140kA/m的矫顽磁性中的至少一个；a drive magnet positioning step of positioning a drive magnet within the channel, the drive magnet having at least one of an energy product greater than about 72 kJ/ m and a coercivity greater than about 140 kA/m; 马达装置设置步骤，其设置包括衔铁并把所述衔铁支承在所述通道内的马达装置；a motor means arranging step of arranging a motor means including an armature and supporting said armature in said channel; 外壳设置步骤，其设置用于所述换能器的外壳；a casing setting step of setting a casing for said transducer; 外壳内组件设置步骤，其在所述外壳内设置磁体装置、所述马达装置以及振动膜，所述振动膜被可活动地支承在所述外壳内；以及an assembly-in-housing step of arranging a magnet device, said motor device, and a vibrating membrane within said housing, said vibrating membrane being movably supported within said housing; and 耦合步骤，其把所述振动膜耦合至所述衔铁。a coupling step of coupling the diaphragm to the armature. 15、根据权利要求14所述的制造换能器的方法，其中，形成磁体装置的步骤包括在所述通道内设置第一驱动磁体和第二驱动磁体的步骤。15. A method of manufacturing a transducer according to claim 14, wherein the step of forming the magnet arrangement includes the step of providing a first drive magnet and a second drive magnet within the channel. 16、根据权利要求14所述的制造换能器的方法，其中，所述磁轭具有约2.0T的饱和电感。16. The method of manufacturing a transducer according to claim 14, wherein the yoke has a saturation inductance of about 2.0T. 17、根据权利要求14所述的制造换能器的方法，其中，所述磁轭包括钴铁(FeCo)合金。17. The method of manufacturing a transducer according to claim 14, wherein the yoke comprises a cobalt-iron (FeCo) alloy. 18、根据权利要求14所述的制造换能器的方法，其中，所述磁轭包括钒钴铁(FeCoV)合金。18. The method of manufacturing a transducer according to claim 14, wherein the yoke comprises an iron-vanadium-cobalt (FeCoV) alloy. 19、根据权利要求14所述的制造换能器的方法，其中，所述驱动磁体设置步骤包括在所述通道内设置第一驱动磁体和第二驱动磁体的步骤。19. The method of manufacturing a transducer according to claim 14, wherein said drive magnet positioning step includes the step of positioning a first drive magnet and a second drive magnet within said channel. 20、根据权利要求14所述的制造换能器的方法，所述驱动磁体具有大于约72kJ/m3的能量乘积、大于约1T的饱和电感以及大于约140kA/m的矫顽磁性。20. The method of manufacturing a transducer of claim 14, said drive magnet having an energy product greater than about 72 kJ/ m3 , a saturation inductance greater than about IT, and a coercivity greater than about 140 kA/m. 21、根据权利要求14所述的制造换能器的方法，所述驱动磁体具有约191kJ/m3到约422kJ/m3的能量乘积。21. The method of manufacturing a transducer according to claim 14, said drive magnet having an energy product of about 191 kJ/ m3 to about 422 kJ/ m3 . 22、根据权利要求14所述的制造换能器的方法，所述驱动磁体具有约690kA/m到约1040kA/m的矫顽磁性。22. The method of manufacturing a transducer according to claim 14, said driving magnet having a coercivity of about 690 kA/m to about 1040 kA/m. 23、根据权利要求14所述的制造换能器的方法，其中，所述驱动磁体包括从由钴钐(SmCo)合金和硼铁钕(NdFeB)合金组成的合金组中选择的合金。23. The method of manufacturing a transducer according to claim 14, wherein the driving magnet comprises an alloy selected from the group consisting of Samarium Cobalt (SmCo) alloy and Neodymium Iron Boron (NdFeB) alloy. 24、根据权利要求14所述的制造换能器的方法，该制造换能器的方法包括把所述换能器设置为麦克风和接收器中的一种的步骤。24. A method of manufacturing a transducer according to claim 14, including the step of configuring said transducer as one of a microphone and a receiver. 25、根据权利要求14所述的制造换能器的方法，该制造换能器的方法包括设置所述换能器以在助听器、耳内式监听器、头戴式耳机、电子听力保护装置以及扬声器中的至少一种中使用的步骤。25. A method of manufacturing a transducer according to claim 14, comprising arranging said transducer for use in hearing aids, in-ear monitors, headphones, electronic hearing protection devices, and steps used in at least one of the speakers.
CNA2004800433303A 2004-06-14 2004-06-14 Magnets for transducers Pending CN1969590A (en)

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PCT/US2004/018570 WO2006001792A1 (en) 2004-06-14 2004-06-14 Magnet assembly for a transducer

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CN1969590A true CN1969590A (en) 2007-05-23

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CN103747384A (en) * 2013-12-27 2014-04-23 苏州恒听电子有限公司 A receiver with an improved driving structure
CN104703102A (en) * 2015-02-12 2015-06-10 苏州赫里翁电子科技有限公司 Sound pressure output device of moving iron unit
CN106060736A (en) * 2016-06-30 2016-10-26 苏州三色峰电子有限公司 Balance armature receiver
CN106331964A (en) * 2016-10-09 2017-01-11 苏州倍声声学技术有限公司 Drop-resisting moving-iron telephone receiver
CN107407588A (en) * 2015-03-25 2017-11-28 恩德莱斯和豪瑟尔两合公司 For Industry Control and electromagnetic drive unit/receiving unit of the field apparatus of automation
CN116233667A (en) * 2023-05-10 2023-06-06 东莞市金文华数码科技有限公司 High-performance sound box module and electronic equipment

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CN103024645B (en) * 2011-09-27 2017-02-08 苏州新吴光电科技有限公司 Magnetic yoke device for moving-iron type microphone/transducer

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Publication number Priority date Publication date Assignee Title
CN103747384A (en) * 2013-12-27 2014-04-23 苏州恒听电子有限公司 A receiver with an improved driving structure
CN104703102A (en) * 2015-02-12 2015-06-10 苏州赫里翁电子科技有限公司 Sound pressure output device of moving iron unit
CN107407588A (en) * 2015-03-25 2017-11-28 恩德莱斯和豪瑟尔两合公司 For Industry Control and electromagnetic drive unit/receiving unit of the field apparatus of automation
US10527585B2 (en) 2015-03-25 2020-01-07 Endress+Hauser SE+Co. KG Electromagnetic driving/receiving unit for a field device of automation technology
CN106060736A (en) * 2016-06-30 2016-10-26 苏州三色峰电子有限公司 Balance armature receiver
CN106060736B (en) * 2016-06-30 2021-03-23 苏州三色峰电子有限公司 Balanced armature type telephone receiver
CN106331964A (en) * 2016-10-09 2017-01-11 苏州倍声声学技术有限公司 Drop-resisting moving-iron telephone receiver
CN116233667A (en) * 2023-05-10 2023-06-06 东莞市金文华数码科技有限公司 High-performance sound box module and electronic equipment

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