WO2013044551A1 - 用于动铁式传声器/换能器的磁轭装置 - Google Patents

用于动铁式传声器/换能器的磁轭装置 Download PDF

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Publication number
WO2013044551A1
WO2013044551A1 PCT/CN2011/082135 CN2011082135W WO2013044551A1 WO 2013044551 A1 WO2013044551 A1 WO 2013044551A1 CN 2011082135 W CN2011082135 W CN 2011082135W WO 2013044551 A1 WO2013044551 A1 WO 2013044551A1
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WO
WIPO (PCT)
Prior art keywords
transducer
moving iron
microphone
yoke device
soft magnetic
Prior art date
Application number
PCT/CN2011/082135
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English (en)
French (fr)
Inventor
吴哲
Original Assignee
苏州新吴光电科技有限公司
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Publication date
Application filed by 苏州新吴光电科技有限公司 filed Critical 苏州新吴光电科技有限公司
Priority to US14/233,338 priority Critical patent/US9332328B2/en
Priority to EP11873366.6A priority patent/EP2763434B1/en
Priority to DK11873366.6T priority patent/DK2763434T3/en
Publication of WO2013044551A1 publication Critical patent/WO2013044551A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • 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
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
    • 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
    • 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
    • H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H04R9/027—Air gaps using a magnetic fluid

Definitions

  • the present invention relates to a soft magnetic device for transmitting magnetic lines of force, and more particularly to a yoke device for use in a micro-moving iron microphone/transducer device, belonging to the fields of electroacoustics, micromechanics and metal materials and processing.
  • the yoke devices used for moving iron microphones/transducers are mostly enclosed, but the thickness of each surrounding edge is different. Due to the design, the traditional yoke usually adopts laminated and cast two. Manufacturing method.
  • the lamination method uses a sheet having a feature of enclosing a soft magnetic body and an inner through hole by stamping, and then stacking the sheets by mechanical assistance, and finally joining the stacked sheets into a yoke by resistance welding;
  • the casting method requires firstly making a casting mold corresponding to the desired yoke, and then casting the desired yoke by powder metallurgy.
  • the existing two methods generally have the disadvantages of complicated manufacturing process, large process variation, and high cost; further, the resistance welding process used in the lamination method generates a large amount of heat to destroy the internal magnetic circuit structure of the yoke.
  • the magnetic yoke produced by the casting method leaves a lot of dense air gap because of its own characteristics of powder metallurgy, which also destroys the magnetic circuit structure inside the yoke, causing its magnetic permeability to decrease.
  • Such structural, economic and functional deficiencies have jointly led to the development of moving iron microphones/transducers, which greatly weakened their competitive advantage.
  • the present invention is directed to a moving iron microphone/transducer having an improved structure and process A yoke device which can greatly improve the manufacturability of the yoke device and reduce the manufacturing cost thereof, and effectively optimize the magnetic magnetic circuit of the associated yoke, and at the same time significantly improve the microphone/change using the relevant yoke The performance of the energy product.
  • the content of the present invention has a large technical expansion space and good market promotion, thereby overcoming the deficiencies in the prior art.
  • a yoke device for use in a moving iron microphone/transducer comprising an inner through hole, enclosing a soft magnetic body and four end portions orthogonal to the enclosed soft magnetic body.
  • each of the surrounding edge bends has a chamfered design adapted to the process improvement.
  • the material of the yoke device is made of a soft magnetic alloy such as soft iron, A3 steel, or permalloy which has a relatively high magnetic permeability.
  • the yoke device can also be manufactured using a ferrite material.
  • the enclosed soft magnetic body may also have different material thicknesses and different surrounding configurations according to different functional requirements, to generate different peripheral shapes and the inner through hole shape, to satisfy the magnetic circuit design and Various requirements on mechanical assembly.
  • the enclosed configuration and the shape of the inner through hole are (but not limited to): chamfered rectangle, chamfered square and I-shaped.
  • the invention is also unique in that the manufacturing process of the yoke device is that the soft magnetic material required for fabricating the yoke device is first drawn by the metal pipe stretching process to have the softness of the enclosure.
  • the metal tube of the magnet and the inner through hole structure is further cut in a direction orthogonal to the inner through hole (ie, the end surface direction) according to the length required by the design.
  • the periphery of the enclosed soft magnetic body is connected to the armature of the moving iron microphone/transducer, and the inner through hole is used for combining with the magnetic sheet in the movable iron microphone/transducer
  • One of the two end faces is used in combination with the induction coil of the microphone/transducer to form the moving iron microphone/transducer Vibration/transformation drive mechanism in the unit.
  • the periphery of the enclosed soft magnetic body and the armature of the movable iron microphone/transducer are fixedly connected by electric resistance, laser or ultrasonic welding.
  • the inner through hole is combined with the magnetic piece in the moving iron microphone/transducer by laser, ultrasonic welding or adhesive bonding.
  • the combination of one of the two end faces and the induction coil of the moving iron microphone/transducer is an adhesive bond.
  • the present invention unifies the thickness of each enclosed edge in the soft magnetic body, thereby introducing an improved yoke manufacturing process and realizing the function Under the premise, the yoke manufacturing process is largely compressed, the production efficiency is improved, and the manufacturing cost of the yoke is greatly reduced;
  • a magnetic yoke manufacturing process for stretching and cutting a metal pipe used in the present invention is directed to the prior art laminated and cast yokes having magnetic circuit damage and insufficient magnetic permeability due to process defects, The integrity of the metal material is ensured to the greatest extent, the magnetic circuit is effectively protected, and the performance of the microphone/transducer device using the yoke device of the present invention is remarkably improved;
  • the enclosed soft magnetic body of the yoke of the present invention may also have different material thicknesses and different surrounding configurations according to different functional requirements, and generate different peripheral shapes and inner through hole shapes to satisfy the magnetic circuit.
  • the minimum thickness of the enclosed edge can be up to 0.02 mm, in the shape of the enclosed structure and the shape of the inner through hole (but not limited to): a chamfered rectangle, a chamfered square and an I-shaped; It is completely impossible to achieve in traditional lamination and casting processes. Therefore, the invention has a large technical expansion space and good market promotion.
  • 1 is a schematic view showing the structure and manufacturing flow of a conventional laminated yoke
  • 2 is a schematic structural view of a conventional cast yoke
  • Figure 3 is a schematic view showing the structure of a yoke device for a moving iron microphone/transducer according to the present invention
  • Figure 4 is a schematic view showing the manufacturing process of the yoke device for a moving iron microphone/transducer of the present invention
  • Figure 5 is a cross-sectional structural view showing a yoke device for a moving iron microphone/transducer of the present invention applied to a moving iron microphone/transducer;
  • Figure 6 is a schematic view showing the selection of different shapes of the enclosed soft magnetic body of the yoke device for a moving iron microphone/transducer according to the present invention
  • B1-soft magnet raw material B2-tube having a characteristic of surrounding soft magnetic body and inner through hole, B3- yoke device in the invention
  • C1-vibration conduction device C2-armature, C3-diaphragm, C4-yoke, C5-magnetic plate, C6-induction coil, C7-shield case, C8-induction coil signal line, C9-sound port.
  • the present embodiment relates to a yoke device for a moving iron microphone/transducer comprising an inner through hole A2, a soft magnetic body A1 and two orthogonal to the surrounding soft magnetic body. End face A3 composition.
  • the enclosed soft magnetic body A1 is a unitary structure, and each of the surrounding side bends has a chamfering design adapted to the process improvement.
  • the soft magnetic material raw material B1 required for manufacturing the yoke device is first drawn by a metal pipe drawing process.
  • the metal tube B2 surrounding the soft magnetic body A1 and the inner through hole A2 is cut into a single yoke B3 in a direction orthogonal to the inner through hole A2 (ie, the end surface A3 direction) as designed.
  • the periphery of the enclosed soft magnetic field A1 of the yoke C4 is fixedly connected with the armature C2 of the movable iron microphone/transducer, and the inner through hole A2 is used for moving In the iron microphone / transducer, the magnetic plate C5 is fixedly combined, and one of the two ends A3 is fixedly connected with the induction coil C6 of the microphone/transducer to form a vibration/transformation in the moving iron microphone/transducer.
  • Drive mechanism When specifically applied to the moving iron microphone/transducer, the periphery of the enclosed soft magnetic field A1 of the yoke C4 is fixedly connected with the armature C2 of the movable iron microphone/transducer, and the inner through hole A2 is used for moving In the iron microphone / transducer, the magnetic plate C5 is fixedly combined, and one of the two ends A3 is fixedly connected with the induction coil C6 of the microphone/transducer to form a vibration/transformation in the moving iron microphone/transducer
  • the alternating current signal is transmitted to the induction coil C6 through the induction coil signal line C8, and thereby an electromagnetic induction effect is induced to induce an alternating magnetic field, and the alternating magnetic field is magnetized.
  • the armature C2 in the vibration/transformation drive mechanism the armature C2 is pushed and pulled according to the principle of the same pole repulsive and the opposite pole attraction, and the magnetic plate C5 is pushed and pulled to drive the vibration conduction device welded to the armature C2.
  • the sound output port C9 emits a sound, and the energy conversion effect from electric energy to magnetic energy to mechanical energy and finally to sound energy is completed.
  • the invention aims at the defects of the existing yoke device design on the enclosure structure, adopts an integral enclosed soft magnetic structure, and increases the corner of each enclosed side of the enclosed soft magnetic body with the adaptation to the process improvement.
  • the chamfer design introduces an improved yoke manufacturing process, which realizes the yoke manufacturing process to a large extent under the premise of the same function, improves the production efficiency, and greatly reduces the manufacturing cost of the yoke.
  • the invention also aims at the magnetic circuit damage and the magnetic permeability caused by the existing laminated and cast yokes due to the defects of the process, and the yoke manufacturing process of the metal pipe stretching and cutting is adopted, the maximum To the extent that the integrity of the metal material is ensured, the magnetic circuit is effectively protected, and the performance of the microphone/transducer device using the yoke device of the present invention is remarkably improved; further, the enclosing of the yoke is soft in the present invention.
  • the magnets can also be made of different material thicknesses and different enclosure configurations according to different functional requirements, resulting in different peripheral shapes and inner through-hole shapes to meet various requirements in magnetic circuit design and mechanical assembly.
  • the minimum thickness of the enclosed edge can be up to 0.02 mm, in the shape of the enclosed structure and the shape of the inner through hole (but not limited to): a chamfered rectangle, a chamfered square and an I-shaped;
  • the traditional lamination and casting process can not be realized at all, so that the invention has a large technical expansion space and good market promotion.

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

Abstract

一种用于动铁式传声器/换能器的磁轭装置，包括内通孔，围合软磁体和正交于围合软磁体的两个端面。该磁轭装置为一整体结构，其外围和内通孔分别用于与传声器/换能器中电枢及磁片连接，两端面之一用于与传声器/换能器的感应线圈组合，构成振动/换能驱动机构。磁轭由拉伸工艺制成管材后切割制成。本方案简化了磁轭的制造工艺，可制造性更强，成本更低；本方案制造工艺无损磁轭导磁性能，改善了磁路结构；磁轭设计突破了传统工艺限制，在磁轭外形设计上更加灵活多变，应用面更广。

Description

用于动铁式传声器 /换能器的磁轭装置
技术领域
本发明涉及一种传输磁力线的软磁装置， 特别涉及一种应用于微型动铁式 传声器 /换能器装置中的磁轭装置， 属于电声学、 微型机械学和金属材料与加工 学领域。
背景技术
目前市场上用于动铁式传声器 /换能器的磁轭装置设计上多为围合式， 但各 围合边厚度各不相同， 受此设计影响， 传统的磁轭通常采用叠片和铸造两种制 造方式。 工艺上， 叠片法采用先由沖压方式制造出具有围合软磁体和内通孔特 征的薄片， 再由机械辅助将薄片堆叠， 最终由电阻焊接方式将堆叠的薄片连接 制成磁轭； 而铸造法需先制作与所需磁轭相应的铸造模具， 再由粉末冶金方式 铸造出所需磁轭。 但现有这两种方式普遍存在制作工艺复杂， 制程变差大， 成 本高的缺点； 更进一步的， 叠片法中使用到的电阻焊接工艺会产生大量热量以 致破坏磁轭内部磁路结构， 降低其导磁性； 同时， 用铸造法制作的磁轭中又因 为粉末冶金的自身特点会留下许多致密的空气隙， 同样破坏了磁轭内部磁路结 构， 致使其导磁性下降。 如此种种结构性、 经济性和功能性上的不足， 共同制 约了动铁式传声器 /换能器的发展， 大大削弱了其竟争优势。
发明内容
本发明旨在提出一种具有改良结构和工艺的用于动铁式传声器 /换能器的 磁轭装置， 其可以在很大程度上提高磁轭装置的可制造性并降低其制造成本， 并有效的优化相关磁轭的导磁磁路， 同时， 显著提升使用相关磁轭的传声器 /换 能器产品的性能。 另外， 本发明内容具有较大的技术拓展空间和很好的市场推 广性， 从而克服了现有技术中的不足。
为实现上述发明目的， 本发明采用了如下技术方案：
一种用于动铁式传声器 /换能器中的磁轭装置， 其包括内通孔， 围合软磁体 和正交于围合软磁体的两个端面四部分组成。
尤为重要的是， 所述围合软磁体为一整体结构， 且各围合边弯折处均带有 适应于工艺改进的倒角设计。
所述磁轭装置的材料使用导磁率比较高的软铁、 A3钢以及坡莫合金等软磁 合金来制造， 在某些特殊场合， 所述磁轭装置也可使用铁氧体材料来制造。
进一步讲， 所述围合软磁体还可根据不同的功能需求， 选用不同的材料厚 度并进行不同的围合构型， 以产生不同的外围形状和所述内通孔形状， 满足磁 路设计和机械组装上的各种要求。可以选用的围合构型及所述内通孔形状有（但 不仅限于）： 带倒角的矩形， 带倒角的正方形及工字形。
本发明的独特之处还在于， 所述磁轭装置的制造工艺流程为， 先由金属管 材拉伸工艺将制作所述磁轭装置需要的软磁材料原材拉制成具有所述围合软磁 体和内通孔结构的金属管， 再沿与所述内通孔正交方向 （即所述端面方向）按 设计要求的长度切割制而成。
在使用时， 所述围合软磁体其外围和所述动铁式传声器 /换能器中电枢连 接， 所述内通孔用于与所述动铁式传声器 /换能器中磁片组合， 所述两端面之一 用于与所述传声器 /换能器的感应线圈组合， 共同构成所述动铁式传声器 /换能 器中的振动 /换能驱动机构。
具体实施上， 所述围合软磁体外围和所述动铁式传声器 /换能器中电枢固定 连接的方式为电阻、 激光或超声波焊接。 所述内通孔与所述动铁式传声器 /换能 器中磁片组合方式为激光、 超声波焊接或胶黏剂粘结。 而所述两端面之一与所 述动铁式传声器 /换能器的感应线圈组合方式为胶黏剂粘结。
与现有技术相比， 本发明的优点在于：
( 1 )针对现有磁轭装置在围合结构上设计的缺陷， 本发明统一了围合软磁 体中各围合边的厚度， 从而引入了改良的磁轭制造工艺， 实现了在功能不变的 前提下， 很大程度上筒化了磁轭制造工艺， 提升了生产效率， 大幅度的降低了 磁轭制造成本；
( 2 )针对现有叠片式和铸造式磁轭因其工艺缺陷而带来的磁路受损、 导磁 性不足， 本发明中所设计采用的金属管材拉伸加切割的磁轭制造工艺， 最大程 度上的保证了金属材料的完整性， 有效保护了磁路， 显著提升了使用本发明中 磁轭装置的传声器 /换能器装置的性能；
( 3 )本发明中磁轭的围合软磁体还可根据不同的功能需求， 选用不同的材 料厚度并进行不同的围合构型， 产生不同的外围形状和内通孔形状， 以满足磁 路设计和机械组装上的各种要求。 可以选用的围合构型及内通孔形状有 （但不 仅限于）： 带倒角的矩形， 带倒角的正方形及工字形； 且支持的围合边最小厚度 可达 0. 02毫米， 在传统叠片和铸造工艺中完全无法实现。 从而使本发明具有了 较大的技术拓展空间和很好的市场推广性。
附图说明
图 1是现有叠片式磁轭的结构和制造流程示意图； 图 2是现有铸造式磁轭结构示意图；
图 3是本发明用于动铁式传声器 /换能器的磁轭装置结构示意图；
图 4 是本发明用于动铁式传声器 /换能器的磁轭装置的制造工艺流程示意 图；
图 5是本发明用于动铁式传声器 /换能器的磁轭装置应用于一种动铁式传声 器 /换能器中的剖面结构示意图；
图 6是本发明用于动铁式传声器 /换能器的磁轭装置的围合软磁体的不同形 状选择示意图；
图中各附图标记及其所指示的组件分别为：
A1-围合软磁体， A2-内通孔， A3-端面
B1-软磁体原材， B2-具有围合软磁体和内通孔特征的管材， B3-本发明中的 磁轭装置
C1-振动传导装置， C2-电枢， C3-振膜， C4-磁轭， C5-磁片， C6-感应线圈， C7-屏蔽壳， C8-感应线圈信号线， C9-出声口。
具体实施方式
以下结合附图及一较佳实施例对本发明的技术方案作进一步的说明。
参阅图 3-6 , 本实施例涉及一种应用于动铁式传声器 /换能器的磁轭装置， 其包括内通孔 A2 , 围合软磁体 A1和正交于围合软磁体的两个端面 A3组成。 其 中， 围合软磁体 A1为一整体结构， 且其各围合边弯折处均带有适应于工艺改进 的倒角设计。
因为这种优化的结构设计， 本实施例中使用了一种新的制造工艺进行生产， 即， 先由金属管材拉伸工艺将制作磁轭装置需要的软磁材料原材 B1拉制成具有 围合软磁体 A1和内通孔 A2结构的金属管 B2 ,再沿与内通孔 A2正交方向（即端 面 A3方向）按设计要求的长度切割制成单个的磁轭 B3。
当具体应用于动铁式传声器 /换能器中时， 磁轭 C4的围合软磁体 A1其外围 和动铁式传声器 /换能器中电枢 C2 固定连接， 内通孔 A2用于与动铁式传声器 / 换能器中磁片 C5固定组合，两端面 A3之一用于与传声器 /换能器的感应线圈 C6 固定连接， 共同构成动铁式传声器 /换能器中的振动 /换能驱动机构。
当前述动铁式传声器 /换能器工作时，交变电流信号通过感应线圈信号线 C8 传导至感应线圈 C6 , 并由此产生电磁感应效应而感生交变磁场， 交变磁场会磁 化所述振动 /换能驱动机构中的电枢 C2 , 前述电枢 C2会根据同极相斥， 异极相 吸的原理与磁片 C5发生推拉作用， 从而带动焊接于前述电枢 C2上的振动传导 装置 C1沿与前述电枢 C2正交的方向产生振动位移， 当振动位移由前述振动传 导装置 C1传播到与其连接的振膜 C3 , 前述振膜 C3受驱动产生振动， 带动其周 围空气振动， 从而由出声口 C9发出声音， 完成由电能至磁能再至机械能最终至 声能的换能效应。
本发明针对现有磁轭装置在围合结构上设计的缺陷， 采用了一个整体的围 合软磁体结构， 且在围合软磁体的各围合边转角处增加了带有适应于工艺改进 的倒角设计， 从而引入了改良的磁轭制造工艺， 实现了在功能不变的前提下， 很大程度上筒化了磁轭制造工艺， 提升了生产效率， 大幅度的降低了磁轭制造 成本； 同时， 本发明还针对现有叠片式和铸造式磁轭因其工艺缺陷而带来的磁 路受损、 导磁性不足， 设计采用了金属管材拉伸加切割的磁轭制造工艺， 最大 程度上的保证了金属材料的完整性， 有效保护了磁路， 显著提升了使用本发明 中磁轭装置的传声器 /换能器装置的性能； 更进一步的， 本发明中磁轭的围合软 磁体还可根据不同的功能需求， 选用不同的材料厚度并进行不同的围合构型， 产生不同的外围形状和内通孔形状， 以满足磁路设计和机械组装上的各种要求。 可以选用的围合构型及内通孔形状有（但不仅限于）： 带倒角的矩形， 带倒角的 正方形及工字形； 且支持的围合边最小厚度可达 0. 02毫米， 在传统叠片和铸造 工艺中完全无法实现， 从而使本发明具有了较大的技术拓展空间和很好的市场 推广性。
以上对本发明的目的、 技术方案和有益效果进行了进一步详细说明， 所应 理解的是， 以上所述仅为本发明的较佳实施例而已， 并不用于限制本发明， 凡 在本发明的精神和原则之内， 所做的任何修改、 等同替换、 改进等， 均应包含 在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种用于动铁式传声器 /换能器中的磁轭装置， 其包括内通孔， 围合软 磁体和正交于围合软磁体的两个端面四部分组成。
2. 根据权利要求 1 所述的用于动铁式传声器 /换能器中的磁轭装置， 其特 征在于： 所述围合软磁体其外围和所述动铁式传声器 /换能器中电枢连接， 所述 内通孔用于与所述动铁式传声器 /换能器中磁片组合， 所述两端面之一用于与所 述传声器 /换能器的感应线圈组合， 共同构成所述动铁式传声器 /换能器中的振 动 /换能驱动机构。
3. 根据权利要求 2 所述的用于动铁式传声器 /换能器中的磁轭装置， 其特 征在于： 所述围合软磁体外围和所述动铁式传声器 /换能器中电枢固定连接的方 式为电阻、 激光或超声波焊接。
4. 根据权利要求 1 所述的用于动铁式传声器 /换能器中的磁轭装置， 其特 征在于： 所述内通孔与所述动铁式传声器 /换能器中磁片组合方式为激光、 超声 波焊接或胶黏剂粘结。
5. 根据权利要求 2 所述的用于动铁式传声器 /换能器中的磁轭装置， 其特 征在于： 所述两端面之一与所述动铁式传声器 /换能器的感应线圈组合方式为胶 黏剂粘结。
6. 根据权利要求 1或 2或 3或 4或 5所述的用于动铁式传声器 /换能器中 的磁轭装置， 其特征在于： 所述磁轭装置中的围合软磁体为一整体结构， 且所 述围合软磁体的各围合边弯折处均带有适应于工艺改进的倒角设计。
7. 根据权利要求 1和 6所述的用于动铁式传声器 /换能器中的磁轭装置， 其特征在于： 所述磁轭装置的材料使用导磁率比较高的软铁、 A3钢以及坡莫合 金等软磁合金来制造， 在某些特殊场合， 所述磁轭装置也可使用铁氧体材料来 制造。
8. 根据权利要求 1和 6所述的用于动铁式传声器 /换能器中的磁轭装置， 其特征在于： 所述围合软磁体可根据不同的功能需求， 选用不同的材料厚度并 进行不同的围合构型， 以产生不同的外围形状和所述内通孔形状， 满足磁路设 计和机械组装上的各种要求。 可以选用的围合构型及所述内通孔形状有 （但不 仅限于）： 带倒角的矩形， 带倒角的正方形及工字形。
9. 根据权利要求 1和 6和 8所述的用于动铁式传声器 /换能器中的磁轭装 置， 其特征在于： 所述磁轭装置的制造工艺流程为， 先由金属管材拉伸工艺将 制作所述磁轭装置需要的软磁材料原材拉制成具有所述围合软磁体和内通孔结 构的金属管， 再沿与所述内通孔正交方向 （即所述端面方向）按设计要求的长 度切割制而成。
1 0. 根据权利要求 1和 2和 6和 8和 9所述的动铁式传声器 /换能器， 其特 征在于： 所述传声器 /换能器中使用了所述磁轭装置， 并由所述围合软磁体其外 围和所述动铁式传声器 /换能器中电枢连接， 所述内通孔用于与所述动铁式传声 器 /换能器中磁片组合， 所述两端面之一用于与所述传声器 /换能器的感应线圈 组合， 共同构成所述动铁式传声器 /换能器中的振动 /换能驱动机构。 当交变电 流信号通过所述感应线圈， 并由此产生电磁感应效应而感生交变磁场， 所述交 变磁场会磁化所述振动 /换能驱动机构中的电枢， 所述电枢会根据同极相斥， 异 极相吸的原理与所述磁片发生推拉作用， 从而带动焊接于所述电枢上的振动传 导装置沿与所述电枢正交的方向产生振动位移， 当振动位移由所述振动传导装 置传播到与其连接的振膜， 所述振膜受驱动产生振动， 带动其周围空气振动, 从而发出声音， 完成由电能至磁能再至机械能最终至声能的换能效应。
PCT/CN2011/082135 2011-09-27 2011-11-14 用于动铁式传声器/换能器的磁轭装置 WO2013044551A1 (zh)

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