WO2013033949A1 - 用于助听器的传声器电磁屏蔽壳 - Google Patents

用于助听器的传声器电磁屏蔽壳 Download PDF

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Publication number
WO2013033949A1
WO2013033949A1 PCT/CN2011/082118 CN2011082118W WO2013033949A1 WO 2013033949 A1 WO2013033949 A1 WO 2013033949A1 CN 2011082118 W CN2011082118 W CN 2011082118W WO 2013033949 A1 WO2013033949 A1 WO 2013033949A1
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Prior art keywords
microphone
electromagnetic shielding
shell
hearing aid
bottom box
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PCT/CN2011/082118
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English (en)
French (fr)
Inventor
周巍
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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 WO2013033949A1 publication Critical patent/WO2013033949A1/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
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/49—Reducing the effects of electromagnetic noise on the functioning of hearing aids, by, e.g. shielding, signal processing adaptation, selective (de)activation of electronic parts in hearing aid

Definitions

  • the present invention relates to an electromagnetic shielding device, and more particularly to an electromagnetic shielding device applied to a micro-microphone device such as a hearing aid, and belongs to the field of electroacoustics and micro-mechanics.
  • the electromagnetic shielding shell used in the microphones for hearing aids on the market generally adopts the docking type.
  • the upper and lower boxes are butt-joined by laser or electric resistance welding, and the magnetic core coil of the microphone is enclosed therein to form a complete electromagnetic Shield the case.
  • a method of stretching, cutting, and secondary processing is employed.
  • the existing electromagnetic shielding shell generally has incomplete electromagnetic shielding, high electromagnetic radiation, complicated combined welding process, and the electromagnetic shielding performance of the product is greatly affected by the process; further, the existing shielding shell (see Figure 1-3)
  • the mechanical structure design of the sound outlet determines that it can only be stretched first, and is manufactured by the secondary processing method, which has high cost and high process difficulty.
  • the object of the present invention is to provide a microphone electromagnetic shielding case for a hearing aid, which can effectively improve the electromagnetic shielding performance of the microphone, and has better manufacturability and cost advantages, thereby overcoming the deficiencies in the prior art.
  • a microphone electromagnetic shielding case for a hearing aid comprising a housing and a bottom box, the housing being combined with the bottom box by a nesting manner, characterized in that: the core coil combination of the microphone The part and the diaphragm part are both placed in the bottom case, and the outer casing and the bottom case are mechanically designed to be in a sliding fit, and the two parts are used in a nested manner.
  • the bottom of the claimed core coil is fixedly connected to the inner wall of the iron box, and at the same time, the diaphragm is fixed to the open end edge of the bottom box.
  • the sound box slot and the signal line slot are also provided on the outer casing of the complaint, and are used for the sound outlet and the signal line outlet of the microphone.
  • the shell and the bottom case are formed by stretching and punching.
  • the outer shape of the outer casing and the bottom box are rectangular, square or round.
  • the present invention adopts a nested structure instead of the shell of the conventional docking structure, and can ensure the product sound quality is unchanged, greatly improving the product. Electromagnetic shielding performance;
  • FIG. 1 is a schematic view of a conventional shielded shell docking structure
  • FIG. 2 is a schematic cross-sectional view of a conventional shielded shell docking structure
  • FIG. 3 is a schematic structural view of a sound outlet of a conventional shield case
  • FIG. 4 is a schematic cross-sectional structural view of a microphone electromagnetic shielding case for a hearing aid according to the present invention
  • Figure 5 is a top plan view of a microphone electromagnetic shielding case for a hearing aid of the present invention
  • Figure 6 is a front elevational view of the electromagnetic shielding case of the microphone for the hearing aid of the present invention.
  • Figure 7 is a rear elevational view of the electromagnetic shielding case of the microphone for the hearing aid of the present invention.
  • the reference numerals in the figure and the components indicated therein are: 1-shell, 2-bottom box, 3-core coil combination, 4-signal slot, 5-diaphragm, 6-speak slot, 7 - Core coil signal line.
  • the present embodiment relates to a microphone electromagnetic shielding case applied to a hearing aid, comprising a housing 1 and a bottom box 2 which are combined in a nested manner, and a signal line slot 4 and a housing provided on the housing 1 a sound groove 6 and a core coil assembly 3, a diaphragm 5 and a core coil combination signal line 7 encapsulated in a bottom case cavity; the core coil assembly 3 is fixedly coupled to the bottom case 2, the diaphragm 5 Fixedly attached to the open end edge of the bottom box 2, the core coil assembly signal line 7 is passed through the bottom box 2 cavity through the signal line slot of the housing 1 for connection to an external circuit for function.
  • the core coil assembly 3 is fixedly coupled to the bottom of the bottom case 1.
  • the diaphragm 5 is preferably fixedly attached to the open end edge of the bottom case 2.
  • the shielding cavity is formed by nesting a casing 1 and a bottom casing 2, and a sliding fit is preferably provided between the casing 1 and the bottom casing 2.
  • the core coil combination signal line 7 is passed through the signal line slot of the outer casing 1 through the cavity of the bottom case 2.
  • the outer casing 1 and the bottom case 1 and the signal line groove 4 and the sound port groove 6 are preferably formed by a one-time drawing process.
  • the electric signal is passed through the core coil combination 3 by the signal line 7 exposed outside the signal line slot 4, and the core coil combination 3 is exchanged according to the electromagnetic induction effect.
  • the magnetic field generated by the variable current will magnetize the core coil assembly 3, and according to the principle of homosexual repulsive and opposite phase attraction, and the magnetizing diaphragm 5 fixed on the open end edge of the bottom box 2, the pushing and pulling force is generated to drive the diaphragm 5 to vibrate.
  • the air is agitated by the vibration of the diaphragm 5 and is transmitted from the sound exit groove 6 of the outer casing 1 to emit sound.
  • the invention improves the mechanical structure of the electromagnetic shielding shell, thereby greatly improving the electromagnetic shielding performance of the product under the condition of ensuring the sound quality of the product, in particular, adopting a nested design, so that the use
  • the electromagnetic shielding performance of the microphone of the electromagnetic shielding shell is greatly enhanced in all directions.
  • the invention also optimizes the mechanical dimensions of the outer casing and the bottom box, and adopts a sliding cooperation combination, which greatly improves the manufacturability of the related microphone product.
  • the invention also reduces the difficulty of the process; in addition, the invention also improves the design of the sound outlet and the signal line outlet of the conventional shielding shell, which is convenient to be fabricated by the stretching and punching one-time forming process, so that the manufacturing process of the magnetic shielding shell is more convenient. The cost is lower.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

本发明公开了一种用于助听器的传声器电磁屏蔽壳，其包括外壳与底盒两部分，所述外壳由嵌套方式与所述底盒组合，其特征在于：所述传声器的所述磁芯线圈组合部分与振膜部分均置于前述底盒中，前述外壳与前述底盒在机械设计上为滑动配合，由嵌套的方式将两部分组合使用。进一步的，前述外壳在其壳体上设计有出声口槽和信号线槽，其分别设置于外壳两侧，分别用于前述传声器的声音出口和前述磁芯线圈组合的信号线出口。前述外壳和底盒由拉伸、冲切一次成型工艺制成。本发明的优点至少在于：采用了嵌套结构代替了传统的对接式结构的壳体组合，可保证产品在声音质量不变的情况下，极大提升产品的电磁屏蔽性能；采用滑动配合组合，大幅提升了相关传声器产品的可制造性，降低了工艺难度；采用了方便拉伸、冲切一次成型工艺的设计，使磁屏蔽壳的制造流程更加筒便，成本更低。

Description

用于助听器的传声器电磁展蔽壳 技术领域
本发明涉及一种电磁屏蔽装置， 特别涉及一种应用于助听器等微型传声器 装置中的电磁屏蔽装置， 属于电声学和微型机械学领域。
背景技术
目前市场上的用于助听器的传声器所使用的电磁屏蔽壳普遍采用对接式， 使用时， 采用激光或电阻焊接的方式， 将上下盒对接组合， 将传声器的磁芯线 圈包围其中， 从而形成完整电磁屏蔽外壳。 制造工艺上， 采用一次拉伸、 切割， 加上二次加工的方法。 但现有的电磁屏蔽壳普遍存在电磁屏蔽不完全， 电磁辐 射高， 组合焊接工艺复杂， 产品电磁屏蔽性能受制程影响大等不足； 更进一步， 现有屏蔽壳的 （参见阅图 1-3 ) 出声口机械结构设计决定了其只能采用先拉伸， 在二次加工的方法制造， 成本高， 工艺难度大。
发明内容
本发明的目的在于提出一种用于助听器的传声器电磁屏蔽壳， 其可以有效 提高传声器的电磁屏蔽性能， 并具有较好的可制造性和成本优势， 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：
一种用于助听器的传声器电磁屏蔽壳， 其包括外壳与底盒两部分， 所述外 壳由嵌套方式与所述底盒组合， 其特征在于： 所述传声器的所述磁芯线圈组合 部分与振膜部分均置于前述底盒中， 前述外壳与前述底盒在机械设计上为滑动 配合， 由嵌套的方式将两部分组合使用。
进一步的讲， 所诉磁芯线圈的底部与所述铁盒内壁固定连接， 同时， 所述 振膜固定于所诉底盒开放端边沿。
所诉外壳与底盒之间为滑动配合组合。
所诉外壳上还设有出声口槽与信号线槽， 用于所诉传声器的声音出口与信 号线出口。
另外， 所诉外壳与底盒为拉伸、 沖切工艺一次成型。
所述外壳和底盒的外形采用长方型、 正方型或圆型。
与现有技术相比， 本发明的优点在于：
( 1 )针对现有磁屏蔽壳设计中对接式存在的缺陷， 本发明采用了嵌套结构 代替了传统的对接式结构的外壳， 可保证产品声音质量不变的情况下， 极大提 升了产品的电磁屏蔽性能；
( 2 )采用滑动配合组合， 相比传统的激光或电阻焊接对工艺的严苛要求， 大幅提升了相关传声器产品的可制造性， 降低了工艺难度；
( 3 )采用了方便拉伸、 沖切一次成型工艺的设计， 使磁屏蔽壳的制造流程 更加筒便， 成本更低。
附图说明
图 1是现有屏蔽壳对接式结构示意图；
图 2是现有屏蔽壳对接式结构的剖面示意图；
图 3是现有屏蔽壳出声口结构示意图；
图 4是本发明用于助听器的传声器电磁屏蔽壳的剖面结构示意图； 图 5是本发明用于助听器的传声器电磁屏蔽壳俯视图；
图 6是本发明用于助听器的传声器电磁屏蔽壳前视图；
图 7是本发明用于助听器的传声器电磁屏蔽壳后视图；
图中各附图标记及其所指示的组件分别为： 1-外壳， 2-底盒， 3-磁芯线圈 组合， 4-信号线槽， 5-振膜， 6-出声口槽， 7-磁芯线圈信号线。
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 4-7 , 本实施例涉及一种应用于助听器的传声器电磁屏蔽壳， 其包括 由嵌套方式组合在一起的外壳 1和底盒 2 ,外壳 1上设有的信号线槽 4和出声口 槽 6 , 及封装于底盒腔体中的磁芯线圈组合 3 , 振膜 5以及磁芯线圈组合信号线 7; 该磁芯线圈组合 3固定连接在底盒 2上， 该振膜 5固定连接在底盒 2的开放 端边沿处， 该磁芯线圈组合信号线 7经底盒 2腔体由外壳 1的信号线槽处穿出， 用于与外部电路的连接以实现功能。
优选的， 该磁芯线圈组合 3固定连接于底盒 1之底部。
前述振膜 5优选为固定连接于底盒 2的开放端边沿处。
前述屏蔽腔体由一外壳 1及一底盒 2嵌套形成， 该外壳 1与底盒 2之间优 选为滑动配合。
前述磁芯线圈组合信号线 7经底盒 2腔体由外壳 1的信号线槽处穿出。 前述外壳 1和底盒 1及前述信号线槽 4及出声口槽 6优选的采用拉伸、 沖 切一次成型工艺制作。
当使用该电磁屏蔽壳的传声器单元工作时， 电信号会由露出于信号线槽 4 外的信号线 7通过磁芯线圈组合 3 , 根据电磁感应效应， 磁芯线圈组合 3中的交 变电流产生的磁场会磁化磁芯线圈组合 3 , 根据同性相斥、 异性相吸的原理和固 定在底盒 2开放端边沿上的磁化振膜 5发生推、 拉作用力， 带动振膜 5振动， 由振膜 5的振动而鼓动空气由外壳 1的出声口槽 6中传出， 从而发出声音。
本发明对电磁屏蔽壳的机械结构做了改良设计， 从而在保证产品声音质量 的情况下， 极大的提升了产品的电磁屏蔽性能， 具体而言， 即， 采用了嵌套型 设计， 使得使用该电磁屏蔽壳的传声器在各个方向的电磁屏蔽性能都大为增强， 同时， 本发明还对外壳与底盒的机械尺寸进行了优化， 采用滑动配合组合， 大 幅提升了相关传声器产品的可制造性， 降低了工艺难度； 另外， 本发明还改进 了传统屏蔽壳的出声口与信号线出口设计， 方便其采用拉伸、 沖切一次成型工 艺制作， 使磁屏蔽壳的制造流程更加筒便， 成本更低。
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. 一种用于助听器的传声器电磁屏蔽壳， 包括外壳与底盒两部分， 所述外 壳由嵌套方式与所述底盒组合， 其特征在于： 所述传声器的所述磁芯线圈组合 部分与所述振膜部分均置于前述底盒中， 前述外壳与前述底盒在机械设计上为 滑动配合， 由嵌套的方式将两部分组合使用。
2. 根据权利要求 1所述的用于助听器的传声器电磁屏蔽壳， 其特征在于： 所诉磁芯线圈的底部与所述铁盒内壁固定连接， 同时， 所述振膜固定于所诉底 盒开放端边沿。
3. 根据权利要求 1或 2所述的用于助听器的传声器电磁屏蔽壳， 其特征在 于： 所诉外壳与底盒之间为滑动配合组合。
4. 根据权利要求 1所述的用于助听器的传声器电磁屏蔽壳， 其特征在于： 所诉外壳上设有出声口槽与信号线槽， 用于所诉传声器的声音出口与信号线出 口。
5. 根据权利要求 1或 2所述的用于助听器的传声器电磁屏蔽壳， 其特征在 于： 所诉外壳与底盒为拉伸、 沖切工艺一次成型。
6. 根据权利要求 1或 2或 3或 4或 5所述的用于助听器的传声器电磁屏蔽 壳， 其特征在于： 所述外壳和底盒的外形采用长方型、 正方型或圆型。
1
PCT/CN2011/082118 2011-09-08 2011-11-12 用于助听器的传声器电磁屏蔽壳 WO2013033949A1 (zh)

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