WO2013023413A1 - 用于扬声装置的动铁单元 - Google Patents

用于扬声装置的动铁单元 Download PDF

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Publication number
WO2013023413A1
WO2013023413A1 PCT/CN2011/081816 CN2011081816W WO2013023413A1 WO 2013023413 A1 WO2013023413 A1 WO 2013023413A1 CN 2011081816 W CN2011081816 W CN 2011081816W WO 2013023413 A1 WO2013023413 A1 WO 2013023413A1
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Prior art keywords
vibration
diaphragm
vibration ring
ring
moving iron
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PCT/CN2011/081816
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English (en)
French (fr)
Inventor
周巍
Original Assignee
苏州恒听电子有限公司
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Application filed by 苏州恒听电子有限公司 filed Critical 苏州恒听电子有限公司
Publication of WO2013023413A1 publication Critical patent/WO2013023413A1/zh
Priority to US13/780,646 priority Critical patent/US8861754B2/en

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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
    • H04R11/02—Loudspeakers
    • 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
    • H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery

Definitions

  • the present invention relates to a speaker assembly, and more particularly to a moving iron unit for use in a miniature speaker device such as a headphone, and belongs to the field of electroacoustics and micromechanics. Book
  • the moving iron unit used in moving iron earphones on the market currently adopts the basic principle of electromagnetic conversion.
  • the alternating current signal passes through the magnetic induction line, and the line ⁇ induces magnetism, and the balance is placed in the middle of the line.
  • the armature is magnetically (polarized), and the magnetic (polar) balanced armature vibrates up and down in the two permanent magnets according to the principle of the same (polar) repulsive and different (polar) attraction.
  • the vocalization diaphragm of the iron unit is modified, and a metal transmission rod is connected to the balance armature.
  • the object of the present invention is to provide a moving iron unit for a speaker device, which can effectively improve the earphone conversion efficiency and has better mechanical shock resistance, thereby overcoming the deficiencies in the prior art.
  • a moving iron unit for a speaker device comprising a coil, a core, a diaphragm and a magnet, wherein the core is placed in a coil, and the magnet is connected to the diaphragm, and is characterized in that:
  • the vibrating ring is fixed on the vibrating ring, and the vibrating ring is fixed on the inner wall of the shielding cavity via an elastic body disposed along the radial direction thereof, and the vibrating ring is connected to the diaphragm through the conductive rod.
  • the magnet is fixed on one side of the vibration ring, the vibration ring is coaxially disposed with the wire, and one side thereof is connected to the inner wall of the shielding cavity via a spring disposed along the radial direction thereof, and at the same time, the iron One end of the core is fixedly connected to the inner wall of the shielding cavity.
  • a diaphragm holder is further disposed on the inner wall of the shielding cavity, and the diaphragm is fixedly connected to the diaphragm bracket.
  • the diaphragm is two pieces, which are symmetrically disposed on both sides of the vibration ring, and are respectively connected to the vibration ring via a conductive rod.
  • the turns are wound directly on the core.
  • the shielding cavity is formed by a shielding shell and a shielding bottom cover, and the diaphragm brackets are symmetrically disposed on opposite sidewalls of the shielding shell, and a sidewall between the two sidewalls is connected with a spring The ring is connected.
  • One end of the iron core and the wire is fixedly connected to the shielding bottom cover.
  • the vibration ring adopts a 0-type vibration ring.
  • the invention adopts the vibration ring structure instead of the original balanced armature structure, thereby greatly improving the anti-mechanical of the product while ensuring the smooth magnetic circuit of the product. Impact performance
  • FIG. 1 is a schematic structural view of a conventional "U" type balance armature
  • FIG. 2 is a schematic structural view of a conventional "E" type balance armature
  • FIG. 3 is a schematic structural view of a conventional flat type balance armature
  • FIG. 4 is a cross-sectional structural view of a moving iron unit for an earphone according to the present invention
  • FIG. 5 is a plan view of a moving iron unit for an earphone according to the present invention
  • the embodiment relates to a moving iron unit applied to an earphone, which comprises a wire ⁇ 1, a core 4, a diaphragm, a magnet 8 and a 0-type ring 9 which are enclosed in a shielding cavity.
  • the wire ⁇ 1 is disposed on the iron core 4, and the magnet 8 is fixed on the vibration ring 9.
  • the vibration ring 9 is fixed on the inner wall of the shielding cavity via an elastic body disposed along the radial direction thereof, and the vibration ring is simultaneously
  • the transmission rod is connected to the diaphragm drive.
  • the magnet is fixed on one side of the vibration ring, the vibration ring is coaxially disposed with the wire, and one side of the body is connected to the inner wall of the shielding cavity via an elastic body disposed along the radial direction thereof, and the core and the wire are simultaneously One end of the crucible is fixedly connected to the inner wall of the shielding cavity.
  • the diaphragm is preferably two diaphragms 5, 6 which are symmetrically disposed on both sides of the ring and are connected to the ring 9 via a conductive rod 12, 1 1 , respectively.
  • the diaphragm holders 7 and 10 are further disposed on the inner wall of the shielding cavity, and the diaphragms 5 and 6 are fixedly connected to the diaphragm holders 10 and 7, respectively.
  • the shielding cavity is formed by a shielding shell 2 and a shielding bottom cover 3.
  • the diaphragm brackets are symmetrically disposed on opposite sidewalls of the shielding shell, and a sidewall between the two sidewalls passes through the spring 13 Connected to the ring.
  • One end of the iron core and the wire is fixedly connected to the shield bottom cover.
  • the aforementioned turn 1 is preferably formed by winding directly onto the core 4.
  • the aforementioned elastomer preferably uses a spring 13.
  • the electric signal When the moving iron unit is working, the electric signal will pass through the line ⁇ 1. According to the electromagnetic induction effect, the magnetic field generated by the alternating current in the line ⁇ 1 will magnetize the iron core 4, and the iron core 4 will be repelled according to the same sex and the opposite sex. The principle and the magnet 8 fixed to the ring 9 are pushed and pulled, and the ring 9 is connected to the shield case 2 by the spring 13.
  • the vibrating ring 9 When the magnet 8 is driven, the vibrating ring 9 will be squeezed or stretched, which in turn will drive the conductive rods 1 1 and 12 to move, and the conductive rods 11 and 12 will again
  • the diaphragms 5, 6 fixed to the diaphragm holders 7, 10 are driven to vibrate, and the air is encouraged to be transmitted from the opening of the shield case 3 by the vibration of the diaphragms 5, 6 to emit sound.
  • the invention improves the mechanical structure of the balance armature, thereby greatly improving the mechanical impact resistance of the product under the condition of ensuring the smooth magnetic circuit of the product, in particular, adopting the ring "0"
  • the "type design makes the balance armature's mechanical shock resistance in the horizontal and vertical directions greatly enhanced.
  • the invention also optimizes the diaphragm driving structure by the interaction of the magnet, the ring and the iron core. Simultaneously driving two diaphragms to simultaneously emit sound, which greatly improves the conversion efficiency of the product compared with the traditional diaphragm.

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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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

本发明公开了一种用于扬声装置的动铁单元，其包括线圈、铁芯、振膜和磁铁，所述铁芯置于线圈中，所述磁铁与振膜传动连接，其特征在于：它还包括振环，所述磁铁固定在该振环上，该振环经沿其径向设置的弹性体固定在一屏蔽腔体内壁上，同时，该振环经传导杆与振膜传动连接。进一步的，前述振膜为两片，其对称设置于振环两侧，并分别经一传导杆与振环传动连接。前述线圈直接于铁芯上绕制成型。本发明的优点至少在于：采用了振环结构替代传统平衡电枢，可在保证产品磁路畅通的情况下，极大提升了产品的抗机械冲击性能；采用两片振膜同时发声，大幅提升了产品的转换效率；采用了线圈直接成型于铁芯上的设计，使动铁单元的制造流程更加简便，成本更低。

Description

用于扬声装置的动铁单元
技术领域 本发明涉及一种扬声装说置，特别涉及一种应用于耳机等微型扬声 装置中的动铁单元， 属于电声学和微型机械学领域。 书
背景技术 目前市场上的动铁耳机中所使用的动铁单元采用了电磁转换的 基本原理，工作时，以交流电流信号通过磁感应线圏，线圏感应生磁， 对置于线圏中部的平衡电枢进行磁（极）化， 被磁（极）化的平衡电 枢则根据同 （极）性相斥、 异（极）性相吸的原理在两块永磁体中上 下振动。 改动铁单元的发声振膜， 由一根金属传动杆连接在平衡电枢 上， 在电枢上下振动的同时， 也带动了振膜上下振动， 并因此而鼓动 耳机腔体中的空气， 从而发出声音。但现有的动铁耳机普遍存在转换 效率低， 高 /低频响应不足， 响应速度偏慢、 谐波失真较高， 音质易 受温湿度变化影响等不足， 尤其对于其中的平衡电枢来说， 目前常见 的 "U" 型、 "E" 型和平板型平衡电枢（参阅图 1-图 3 ) 均存在抗机 械沖击能力差的弱点。
发明内容 本发明的目的在于提出一种用于扬声装置的动铁单元 ,其可有效 提高耳机转换效率， 并具有较好抗机械沖击性能，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：
一种用于扬声装置的动铁单元， 包括线圏、 铁芯、 振膜和磁铁， 所述铁芯置于线圏中， 所述磁铁与振膜传动连接， 其特征在于： 它还 包括振环， 所述磁铁固定在该振环上， 该振环经沿其径向设置的弹性 体固定在一屏蔽腔体内壁上，同时，该振环经传导杆与振膜传动连接。
进一步的讲， 所述磁铁固定于振环一侧面上， 所述振环与线圏同 轴设置，其一侧部经沿其径向设置的弹簧与屏蔽腔体内壁连接，同时， 所述铁芯一端与屏蔽腔体内壁固定连接。
所述屏蔽腔体内壁上还设有振膜支架，所述振膜与振膜支架固定 连接。
所述振膜为两片， 其对称设置于振环两侧， 并分别经一传导杆与 振环传动连接。
所述线圏直接绕制在所述铁芯上。
所述屏蔽腔体由一屏蔽壳体及一屏蔽底盖围合形成，所述屏蔽壳 体相对的两侧壁上对称设置振膜支架，该两侧壁之间的一侧壁经一弹 簧与振环连接。
所述铁芯和线圏一端与该屏蔽底盖固定连接。
所述振环采用 0型振环。
与现有技术相比， 本发明的优点在于： ( 1 )针对现有技术中平衡电枢的设计缺陷， 本发明采用了振环 结构代替原有平衡电枢结构，从而在保证产品磁路畅通的情况下， 极 大的提升了产品的抗机械沖击性能；
( 2 )采用了独特的振膜驱动结构设计， 由磁铁、 振环和铁芯的 交互作用可同时驱动两片振膜同时发声， 相比传统的一片振膜，提升 了产品的转换效率；
( 3 )采用了线圏直接成型于铁芯上的设计， 使整个动铁单元的 制造流程更加筒便， 成本更低。 附图说明
图 1是现有 "U" 型平衡电枢的结构示意图；
图 2是现有 "E" 型平衡电枢的结构示意图；
图 3是现有平板型平衡电枢的结构示意图；
图 4是本发明用于耳机的动铁单元的剖面结构示意图； 图 5是本发明用于耳机的动铁单元的俯视图；
图中各附图标记及其所指示的组件分别为： 1-线圏， 2-屏蔽壳， 3 -屏蔽底盖， 4_铁芯， 5、 6_振膜， 7、 10 -振膜支架， 8_磁铁， 9 -振 环， 11、 12 -传导杆， 1 3-弹簧。 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 4-5 , 本实施例涉及一种应用于耳机中的动铁单元， 其包 括封装于一屏蔽腔体中的线圏 1 , 铁芯 4 , 振膜、 磁铁 8以及 0型振 环 9 ; 该线圏 1套设在铁芯 4上， 该磁铁 8固定在该振环 9上， 该振 环 9经沿其径向设置的弹性体固定在屏蔽腔体内壁上， 同时， 该振环 经传导杆与振膜传动连接。
优选的， 该磁铁固定于振环一侧面上， 该振环与线圏同轴设置， 其一侧部经沿其径向设置的弹性体与屏蔽腔体内壁连接， 同时， 该铁 芯和线圏一端与屏蔽腔体内壁固定连接。
前述振膜优选为两片振膜 5、 6 , 其对称设置于振环两侧， 并分 别经一传导杆 12、 1 1与振环 9连接。 同时， 在屏蔽腔体内壁上还设 有振膜支架 7、 10 , 振膜 5、 6分别与振膜支架 10、 7固定连接。
前述屏蔽腔体由一屏蔽壳体 2及一屏蔽底盖 3围合形成，该屏蔽 壳体相对的两侧壁上对称设置振膜支架，该两侧壁之间的一侧壁经弹 簧 1 3与振环连接。
前述铁芯和线圏一端与该屏蔽底盖固定连接。
前述线圏 1优选采用直接于铁芯 4上绕制成型的结构。
前述弹性体优选采用弹簧 1 3。
当该动铁单元工作时， 电信号会通过线圏 1 ,根据电磁感应效应， 线圏 1中的交变电流产生的磁场会磁化铁芯 4 , 铁芯 4会根据同性相 斥、 异性相吸的原理和固定在振环 9上的磁铁 8发生推、 拉作用力， 振环 9由弹簧 1 3和屏蔽壳 2相连。 在磁铁 8被驱动时， 振环 9会随 之被挤压或拉伸， 进而带动传导杆 1 1、 12运动， 传导杆 11、 12又会 带动固定在振膜支架 7、 10上的振膜 5、 6振动， 再由振膜 5、 6的振 动而鼓动空气由屏蔽壳体 3的开口中传出， 从而发出声音。
本发明对平衡电枢的机械结构做了改良设计，从而在保证产品磁 路畅通的情况下， 极大的提升了产品的抗机械沖击性能， 具体而言， 即， 采用了环状 "0" 型设计， 使得平衡电枢在水平和竖直方向上的 抗机械沖击能力大为增强， 同时， 本发明还对振膜驱动结构进行了优 化， 由磁铁、 振环和铁芯的交互作用可同时驱动两片振膜同时发声， 相比传统的一片振膜， 大大提升了产品的转换效率。
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. 一种用于扬声装置的动铁单元， 包括线圏、 铁芯、 振膜和磁铁， 所述铁 芯置于线圏中， 所述磁铁与振膜传动连接， 其特征在于： 它还包括振环， 所述 磁铁固定在该振环上， 该振环经沿其径向设置的弹性体固定在一屏蔽腔体内壁 上， 同时， 该振环经传导杆与振膜传动连接。
2. 根据权利要求 1所述的用于扬声装置的动铁单元， 其特征在于： 所述磁 铁固定于振环一侧面上， 所述振环与线圏同轴设置， 其一侧部经沿其径向设置 的弹簧与屏蔽腔体内壁连接， 同时， 所述铁芯一端与屏蔽腔体内壁固定连接。
3. 根据权利要求 1或 2所述的用于扬声装置的动铁单元， 其特征在于： 所 述屏蔽腔体内壁上还设有振膜支架， 所述振膜与振膜支架固定连接。
4. 根据权利要求 1所述的用于扬声装置的动铁单元， 其特征在于： 所述振 膜为两片， 其对称设置于振环两侧， 并分别经一传导杆与振环传动连接。
5. 根据权利要求 1或 2所述的用于扬声装置的动铁单元， 其特征在于： 所 述线圏直接于铁芯上绕制成型。
6. 根据权利要求 1或 2所述的用于扬声装置的动铁单元， 其特征在于： 所 述屏蔽腔体由一屏蔽壳体及一屏蔽底盖围合形成， 所述屏蔽壳体相对的两侧壁 上对称设置振膜支架， 该两侧壁之间的一侧壁经一弹簧与振环连接。
7. 根据权利要求 6所述的用于扬声装置的动铁单元， 其特征在于： 所述铁 芯和线圏一端与该屏蔽底盖固定连接。
8. 根据权利要求 1或 2或 4所述的用于扬声装置的动铁单元，其特征在于： 所述振环采用 0型振环。
PCT/CN2011/081816 2011-08-15 2011-11-04 用于扬声装置的动铁单元 WO2013023413A1 (zh)

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US13/780,646 US8861754B2 (en) 2011-08-15 2013-02-28 Moving iron unit for loudspeakers

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CN201110232849.8A CN102355617B (zh) 2011-08-15 2011-08-15 用于扬声装置的动铁单元

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WO2020228229A1 (zh) * 2019-05-14 2020-11-19 潘国昌 一种平衡振动***
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