WO2016197536A1 - 压电扬声器 - Google Patents

压电扬声器 Download PDF

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Publication number
WO2016197536A1
WO2016197536A1 PCT/CN2015/094543 CN2015094543W WO2016197536A1 WO 2016197536 A1 WO2016197536 A1 WO 2016197536A1 CN 2015094543 W CN2015094543 W CN 2015094543W WO 2016197536 A1 WO2016197536 A1 WO 2016197536A1
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Prior art keywords
piezoelectric
voice coil
hearing aid
piezoelectric speaker
aid voice
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French (fr)
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蔡晓东
赵国栋
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Goertek Inc
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Goertek Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Definitions

  • the present invention relates to the field of electroacoustics, and more particularly to a piezoelectric speaker.
  • Speaker devices as the main sounding unit of portable electronic terminals, directly affect the use of portable electronic devices.
  • Piezoelectric speakers have become more and more important in the industry due to their thin thickness.
  • a hearing aid voice coil is arranged in the piezoelectric speaker.
  • the prior art piezoelectric speaker with the hearing aid voice coil needs to be separately placed with the hearing aid voice coil, and the process is complicated and the hearing aid sound is provided.
  • the circle occupies the internal space of the piezoelectric speaker, affects the performance of the piezoelectric speaker, and increases the production cost.
  • the technical problem to be solved by the present invention is to provide a piezoelectric speaker which is thin in design, simple in process and good in performance.
  • the piezoelectric speaker of the present invention adopts the following technical solutions:
  • a piezoelectric speaker comprising a conductive terminal, a frame, a diaphragm fixed to the frame, and a piezoelectric piece fixed to the diaphragm, and the piezoelectric speaker further includes a hearing aid voice coil, the hearing aid The voice coil is a planar voice coil, and the planar hearing aid voice coil is etched on the surface of the piezoelectric sheet; the piezoelectric sheet and the hearing aid voice coil are electrically connected to the conductive terminals, respectively.
  • the conductive terminal corresponds to the piezoelectric piece and the The hearing aid voice coils are respectively provided with pads, and the piezoelectric sheets and the hearing aid voice coil are electrically connected to the conductive terminals through the pads.
  • the piezoelectric sheet is provided with an electrode, and the piezoelectric sheet electrode is electrically connected to the conductive terminal.
  • the hearing aid voice coil evades the electrode arrangement.
  • the piezoelectric sheet includes two partial piezoelectric sheets, the two partial piezoelectric sheets are respectively disposed on two sides of the diaphragm, and the hearing aid voice coil is disposed on the two portions. On any part of the piezoelectric sheet.
  • the hearing aid voice coil may be any one of silver, palladium, nickel, and molybdenum-manganese alloy.
  • the frame includes a front cover and a rear cover, and the front cover is provided with an sound hole.
  • the diaphragm and the piezoelectric piece are fixed by a backing ring connection.
  • the backing ring is a polyethylene naphthalate material.
  • the conductive terminal is a flexible circuit board.
  • the hearing aid voice coil is a planar voice coil, and the hearing aid voice coil is etched on the surface of the piezoelectric sheet, and the hearing aid voice coil is integrated with the piezoelectric sheet, and the hearing aid voice coil does not occupy the piezoelectric speaker interior. Space, without increasing the thickness of the piezoelectric speaker, is conducive to the thin design of the product. Moreover, the hearing aid voice coil is etched on the piezoelectric sheet, which reduces the production difficulty of the piezoelectric speaker assembly and simplifies the production process; the hearing aid voice coil does not affect the performance of the piezoelectric speaker, and is beneficial to improving product performance. Therefore, the piezoelectric speaker of the invention has the advantages of thin design, simple process and good performance.
  • Figure 1 is an exploded view of the piezoelectric speaker of the present invention
  • FIG. 2 is a schematic view showing the combination of the piezoelectric speaker piezoelectric piece, the hearing aid voice coil and the conductive terminal shown in FIG. 1.
  • the piezoelectric speaker of the present invention comprises a frame, a diaphragm 2 fixed to the frame, and a piezoelectric sheet 3 fixedly coupled to the diaphragm 2.
  • the frame includes a front cover 11 and a rear cover 12, and a diaphragm 2 is housed and fixed between the front cover 11 and the rear case 12.
  • the piezoelectric speaker of the present invention further includes a conductive terminal 5, and the piezoelectric sheet 3 is electrically connected to the conductive terminal 5.
  • the conductive terminal 5 electrically combines the piezoelectric sheet 3 with an external circuit, and an external driving signal enters the piezoelectric sheet 3 through the conductive terminal 5.
  • the piezoelectric sheet 3 generates an inverse piezoelectric effect and vibrates, and the diaphragm 2 is vibrated, and the diaphragm 2 vibrates. Inspire the air to make a sound.
  • the piezoelectric speaker of the present invention further includes a hearing aid voice coil 6, the hearing aid voice coil 6 is a planar voice coil, and the etching is disposed on the surface of the piezoelectric sheet 3.
  • the hearing aid voice coil 6 improves the piezoelectric speaker and The performance of hearing aids in conjunction with the use of piezoelectric speakers has increased the breadth of applications.
  • the planar hearing aid voice coil 6 disposed on the surface of the piezoelectric sheet 3 avoids the occupation of the internal space of the piezoelectric speaker by the hearing aid voice coil, and is advantageous for the thin design of the piezoelectric speaker, and at the same time, during the assembly of the piezoelectric speaker, It is not necessary to separately place the hearing aid voice coil to simplify the production process, and the hearing aid voice coil does not affect the performance of the piezoelectric speaker, which is beneficial to improve the performance of the piezoelectric speaker.
  • the corresponding piezoelectric pad 3 on the conductive terminal 5 is provided with a first pad 51, and the corresponding hearing aid voice coil 6 is provided with a second pad 52, and the piezoelectric piece 3 and the hearing aid voice coil 6 respectively pass independent.
  • the pads are electrically connected to the conductive terminals 5 and do not interfere with each other, which is advantageous for improving product performance.
  • the piezoelectric sheet 3 is provided with electrodes, and the electrodes are electrically connected to the conductive terminals 5.
  • the hearing aid voice coil 6 avoids the electrode arrangement of the piezoelectric sheet 3 to ensure that the electrodes of the hearing aid voice coil 6 and the piezoelectric sheet 3 do not interfere with each other, thereby improving product performance.
  • the piezoelectric sheet 3 can also be arranged in two pieces, and two piezoelectric sheets are respectively disposed on both sides of the diaphragm 2 to improve the acoustic performance of the piezoelectric speaker, and the hearing aid voice coil 6 can be set in any On the piezoelectric sheet, the advantages of the piezoelectric speaker of the present invention are not affected.
  • the hearing aid voice coil can be any of silver, palladium, nickel, molybdenum-manganese alloys. It can also be a metal or alloy of other materials, ensuring that the flat hearing aid voice coil is conductive and smooth, and plays a hearing aid role, improving product performance and user experience.
  • the front cover 11 is provided with an acoustic hole for sound emission.
  • a spacer ring 4 is disposed between the piezoelectric sheet 3 and the diaphragm 2, and the piezoelectric sheet 3 is connected and fixed to the diaphragm 2 through the backing ring 4, and the backing ring 4 can improve the vibration uniformity of the diaphragm 2. Improve the acoustic performance of piezoelectric speakers.
  • the backing ring 4 may be a polyethylene naphthalate material.
  • the diaphragm 2 can be made of a polymer material diaphragm.
  • the conductive terminal can be a flexible circuit board.
  • the hearing aid voice coil is a planar voice coil, and the hearing aid voice coil is etched on the surface of the piezoelectric sheet, and the hearing aid voice coil is integrated with the piezoelectric sheet, and the hearing aid voice coil does not occupy the piezoelectric speaker interior. Space, without increasing the thickness of the piezoelectric speaker, is conducive to the thin design of the product. Moreover, the hearing aid voice coil is etched on the piezoelectric sheet, which reduces the production difficulty of the piezoelectric speaker assembly and simplifies the production process; the hearing aid voice coil does not affect the performance of the piezoelectric speaker, and is beneficial to improving product performance. Therefore, the piezoelectric speaker of the invention has the advantages of thin design, simple process and good performance.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

本发明公开了一种压电扬声器，包括导电端子、框架、与所述框架固定的振膜以及固定于所述振膜的压电片，并且：所述压电扬声器还包括助听音圈，所述助听音圈为平面音圈，所述平面助听音圈蚀刻设置于所述压电片表面；所述压电片与所述助听音圈分别与所述导电端子电连接。本发明的压电扬声器，助听音圈蚀刻于压电片上不占用压电扬声器内部空间，不增加压电扬声器厚度，有利于产品的薄型化设计，并且，降低了压电扬声器组装时的生产难度，简化生产工艺；助听音圈不会对压电扬声器性能产生影响，有利于提升产品性能。本发明压电扬声器具有薄型化设计好，工艺简单，性能好的优点。

Description

压电扬声器 技术领域
本发明涉及电声领域，尤其涉及一种压电扬声器。
背景技术
随着科学技术的发展，便携式电子装置受到人们的广泛关注，扬声器装置作为便携式电子终端主要的发声单元，直接影响着便携式电子装置的使用效果。
随着便携式电子装置越来越薄，扬声器装置的厚度越来越成为业界关注的重点。压电扬声器以其厚度薄而越来越成为业界关注的重点。为了提高压电扬声器的应用效果，在压电扬声器内设置有助听音圈，现有技术的带有助听音圈的压电扬声器，需要单独放置助听音圈，工艺复杂，助听音圈占用压电扬声器内部空间，影响压电扬声器的性能，并且提高了生产成本。
因此，有必要提出一种改进，以克服现有技术设置助听音圈的压电扬声器的缺陷。
发明内容
本发明所要解决的技术问题是提供一种薄型化设计好，工艺简单，性能好的压电扬声器。
为了实现上述目的，本发明压电扬声器采用以下技术方案：
一种压电扬声器，包括导电端子、框架、与所述框架固定的振膜以及固定于所述振膜的压电片，并且：所述压电扬声器还包括助听音圈，所述助听音圈为平面音圈，所述平面助听音圈蚀刻设置于所述压电片表面；所述压电片与所述助听音圈分别与所述导电端子电连接。
作为一种优选的技术方案，所述导电端子对应所述压电片及所述 助听音圈分别设置有焊盘，所述压电片与所述助听音圈通过所述焊盘与所述导电端子电连接。
作为一种优选的技术方案，所述压电片设置有电极，所述压电片电极与所述导电端子电连接。作为进一步的优选，所述助听音圈避让所述电极设置。
作为一种优选的技术方案，所述压电片包括两部分压电片，所述两部分压电片分别设置于所述振膜的两侧，所述助听音圈设置于所述两部分压电片的任一一部分上。
作为以上方案的优选方案，所述助听音圈可以为银、钯、镍、钼-锰合金中的任意一种。
作为一种优选的技术方案，所述框架包括前盖及后壳，所述前盖设置有出声孔。
作为一种优选的技术方案，所述振膜与所述压电片通过垫环连接固定。作为进一步优选的技术方案，所述垫环为聚萘二甲酸乙二醇酯材料。
作为一种优选的技术方案，所述导电端子为柔性线路板。
本发明压电扬声器，助听音圈为平面音圈，助听音圈蚀刻设置于压电片的表面，将助听音圈与压电片一体设置，助听音圈不占用压电扬声器内部空间，不增加压电扬声器厚度，有利于产品的薄型化设计。并且，助听音圈蚀刻于压电片上，降低了压电扬声器组装时的生产难度，简化生产工艺；助听音圈不会对压电扬声器性能产生影响，有利于提升产品性能。因此，本发明压电扬声器具有薄型化设计好，工艺简单，性能好的优点。
附图说明
图1为本发明压电扬声器分解图；
图2为图1所示压电扬声器压电片、助听音圈与导电端子结合示意图。
具体实施方式
下面结合附图，详细说明本发明内容：
如图1及图2所示，本发明压电扬声器，包括框架，与框架固定的振膜2以及与振膜2固定结合的压电片3，框架包括前盖11和后壳12，振膜2收容固定于前盖11和后壳12之间。本发明压电扬声器还包括导电端子5，压电片3与导电端子5电连接。导电端子5将压电片3与外部电路电结合，外部驱动信号通过导电端子5进入到压电片3，压电片3产生逆压电效应而振动，带动振膜2振动，振膜2振动策动空气发声。
如图2所示，本发明压电扬声器还包括助听音圈6，助听音圈6为平面音圈，蚀刻设置于压电片3的表面，助听音圈6提高了压电扬声器与助听器配合使用时的性能，提高压电扬声器应用的广泛性。设置于压电片3表面的平面助听音圈6，避免了助听音圈对压电扬声器内部空间的占用，有利于压电扬声器的薄型化设计，同时，在压电扬声器装配过程中，不必单独放置助听音圈，简化生产工艺，助听音圈不会对压电扬声器性能产生影响，有利于提高压电扬声器性能。
如图2所示，导电端子5上对应压电片3设置有第一焊盘51，对应助听音圈6设置有第二焊盘52，压电片3与助听音圈6分别通过独立的焊盘与导电端子5电连接，不会相互干扰，有利于提升产品性能。
本实施例的压电扬声器，压电片3上设置有电极，电极与导电端子5电连接。助听音圈6避让压电片3的电极设置，以保证助听音圈6与压电片3的电极相互不干扰，提高产品性能。
在实际应用中，压电片3也可以设置为两片，两片压电片分别设置于振膜2的两侧，以提高压电扬声器的声学性能，助听音圈6可以设置于任一压电片上，均不影响本发明压电扬声器的优点体现。
在实际应用中，助听音圈可以为银、钯、镍、钼-锰合金中的任 意一种，也可以为其他材料的金属或合金，确保平面的助听音圈导电通畅，起到助听作用，提高产品性能和用户体验。
如图1所示，本实施例的压电扬声器，前盖11上设置有供声音出射的出声孔。
如图1所示，压电片3与振膜2之间设置有垫环4，压电片3通过垫环4与振膜2连接固定，垫环4可以提高振膜2振动的一致性，提高压电扬声器声学性能。作为一种优选方案，垫环4可以为聚萘二甲酸乙二醇酯材料。
在实际应用中，振膜2可以采用高分子材料振膜。导电端子可以为柔性线路板。均可体现本发明压电扬声器优点。
本发明压电扬声器，助听音圈为平面音圈，助听音圈蚀刻设置于压电片的表面，将助听音圈与压电片一体设置，助听音圈不占用压电扬声器内部空间，不增加压电扬声器厚度，有利于产品的薄型化设计。并且，助听音圈蚀刻于压电片上，降低了压电扬声器组装时的生产难度，简化生产工艺；助听音圈不会对压电扬声器性能产生影响，有利于提升产品性能。因此，本发明压电扬声器具有薄型化设计好，工艺简单，性能好的优点。
以上仅为本发明实施案例而已，并不用于限制本发明，但凡本领域普通技术人员根据本发明所揭示内容所作的等效修饰或变化，皆应纳入权利要求书中记载的保护范围内。

Claims (10)

  1. 一种压电扬声器，包括导电端子、框架、与所述框架固定的振膜以及固定于所述振膜的压电片，其特征在于：所述压电扬声器还包括助听音圈，所述助听音圈为平面音圈，所述平面助听音圈蚀刻设置于所述压电片表面；所述压电片与所述助听音圈分别与所述导电端子电连接。
  2. 根据权利要求1所述的压电扬声器，其特征在于：所述导电端子对应所述压电片及所述助听音圈分别设置有焊盘，所述压电片与所述助听音圈通过所述焊盘与所述导电端子电连接。
  3. 根据权利要求1所述的压电扬声器，其特征在于：所述压电片设置有电极，所述压电片电极与所述导电端子电连接。
  4. 根据权利要求3所述的压电扬声器，其特征在于：所述助听音圈避让所述电极设置。
  5. 根据权利要求1所述的压电扬声器，其特征在于：所述压电片包括两部分压电片，所述两部分压电片分别设置于所述振膜的两侧，所述助听音圈设置于所述两部分压电片的任一一部分上。
  6. 根据权利要求1至5任一权利要求所述的压电扬声器，其特征在于：所述助听音圈可以为银、钯、镍、钼-锰合金中的任意一种。
  7. 根据权利要求1所述的压电扬声器，其特征在于：所述框架包括前盖及后壳，所述前盖设置有出声孔。
  8. 根据权利要求1所述的压电扬声器，其特征在于：所述振膜与所述压电片通过垫环连接固定。
  9. 根据权利要求8所述的压电扬声器，其特征在于：所述垫环为聚萘二甲酸乙二醇酯材料。
  10. 根据权利要求1所述的压电扬声器，其特征在于：所述导电端子为柔性线路板。
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CN104936111A (zh) * 2015-06-09 2015-09-23 歌尔声学股份有限公司 压电扬声器
CN107566967A (zh) * 2017-09-18 2018-01-09 东莞市赞歌声学科技有限公司 一种带有导电功能的喇叭振膜
KR102936607B1 (ko) 2019-09-24 2026-03-10 삼성전자주식회사 스피커 모듈을 포함하는 전자 장치

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CN103248990A (zh) * 2013-04-12 2013-08-14 广东欧珀移动通信有限公司 一种压电陶瓷扬声器与近距离无线通讯天线集成的装置
CN104936111A (zh) * 2015-06-09 2015-09-23 歌尔声学股份有限公司 压电扬声器
CN204697287U (zh) * 2015-06-09 2015-10-07 歌尔声学股份有限公司 压电扬声器

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