WO2016165320A1 - 压电扬声器 - Google Patents

压电扬声器 Download PDF

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Publication number
WO2016165320A1
WO2016165320A1 PCT/CN2015/094537 CN2015094537W WO2016165320A1 WO 2016165320 A1 WO2016165320 A1 WO 2016165320A1 CN 2015094537 W CN2015094537 W CN 2015094537W WO 2016165320 A1 WO2016165320 A1 WO 2016165320A1
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WO
WIPO (PCT)
Prior art keywords
piezoelectric
piezoelectric speaker
diaphragm
antenna line
speaker according
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PCT/CN2015/094537
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English (en)
French (fr)
Inventor
蔡晓东
赵国栋
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歌尔声学股份有限公司
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Publication of WO2016165320A1 publication Critical patent/WO2016165320A1/zh

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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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Definitions

  • the invention relates to the field of electroacoustics, and in particular to a multifunctional piezoelectric speaker.
  • Speaker devices as the main sounding unit of portable electronic terminals, directly affect the use of portable electronic devices.
  • the technical problem to be solved by the present invention is to provide a multi-functional piezoelectric speaker with a thin design and high integration.
  • a piezoelectric speaker comprising a conductive terminal, a frame, a diaphragm fixed to the frame, and a piezoelectric sheet fixed to the diaphragm, wherein the piezoelectric sheet surface is provided with an antenna line, and the pressure The electric piece and the antenna line are electrically connected to the conductive terminals, respectively.
  • the conductive terminals are respectively provided with pads corresponding to the piezoelectric sheets and the antenna lines, and the piezoelectric sheets and the antenna lines are electrically connected to the conductive terminals through pads.
  • the antenna line is a conductive metal line.
  • the antenna line is silver, copper or a conductive alloy.
  • the antenna line is disposed on the surface of the piezoelectric sheet by laser direct molding.
  • 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 diaphragm is a polymer material diaphragm.
  • the conductive terminal is a flexible circuit board.
  • the piezoelectric speaker of the present invention has an antenna circuit disposed on the surface of the piezoelectric sheet, and the antenna device and the piezoelectric speaker are integrally provided, and the speaker function and the antenna function are realized at the same time, and the thickness of the piezoelectric speaker is not increased, thereby facilitating thin design and integration of the product. Design.
  • 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 and the circuit board of FIG.
  • 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 sheet 3 of the piezoelectric speaker of the present invention is provided with an antenna line 6 on its surface, and the antenna line 6 is also electrically connected to the conductive terminal 5.
  • the antenna line 6 disposed on the surface of the piezoelectric sheet 3 integrates the antenna function of the piezoelectric speaker of the present invention.
  • the piezoelectric speaker is not provided with other metal materials and has no magnetic field interference, and the antenna line 6 has good working performance.
  • the antenna line 6 disposed on the surface of the piezoelectric sheet 3 does not occupy any space, does not increase the space of the piezoelectric speaker, and is advantageous for the thin design of the product. Therefore, the piezoelectric speaker of the present invention has a thin design and integration. High advantage.
  • the corresponding piezoelectric strip 3 on the conductive terminal 5 is provided with a first pad 51, and the corresponding antenna line 6 is provided with a second pad 52.
  • the piezoelectric sheet 3 and the antenna line 6 respectively pass through separate pads.
  • the conductive terminals 5 are electrically coupled and electrically connected to the external circuit through the conductive terminals 5, so that the piezoelectric sheets 3 and the antenna lines 6 can operate independently of each other.
  • the antenna line 6 is a conductive metal line.
  • materials such as silver, copper or a conductive alloy may be used as the antenna line.
  • the antenna line 6 can be disposed on the piezoelectric sheet 3 by LDS (laser direct molding), or other methods can be used, and the advantages of the piezoelectric speaker of the present invention are not affected.
  • 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.

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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：所述压电片表面设置有天线线路，所述压电片与所述天线线路分别与所述导电端子电连接。本发明的压电扬声器，在压电片表面设置天线线路，将天线装置与压电扬声器一体设置，同时实现扬声器功能及天线功能，不增加压电扬声器厚度，有利于产品的薄型化设计和集成化设计。

Description

压电扬声器 技术领域
本发明涉及电声领域，尤其涉及一种多功能压电扬声器。
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。同时，为了有利于便携式电子装置的薄型化设计，其内部电子部件的集成化设计成为设计趋势。怎样提供一种薄型化设计、集成度高的扬声器成为研发人员面临的问题。
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、集成度高的多功能压电扬声器。
为了实现上述目的，本发明采用以下技术方案：
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，其特征在于：所述压电片表面设置有天线线路，所述压电片与所述天线线路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天线线路分别设置有焊盘，所述压电片与所述天线线路通过焊盘与所述导电端子电连接。
作为一种优选的技术方案，所述天线线路为导电金属线路。
作为一种进一步优选的技术方案，所述天线线路为银、铜或导电合金。
作为一种进一步优选的技术方案，所述天线线路通过激光直接成型设置于所述压电片表面。
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。
作为一种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，所述振膜为高分子材料振膜。
作为一种优选的技术方案，所述导电端子为柔性线路板。
本发明的压电扬声器，在压电片表面设置天线线路，将天线装置与压电扬声器一体设置，同时实现扬声器功能及天线功能，不增加压电扬声器厚度，有利于产品的薄型化设计和集成化设计。
附图说明
图1为本发明压电扬声器分解图；
图2为图1所述压电扬声器压电片与线路板结合示意图。
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，本发明压电扬声器的压电片3表面设置有天线线路6，天线线路6也与导电端子5电连接。设置于压电片3表面的天线线路6，使本发明压电扬声器集成有天线功能，压电扬声器内不设置有其他金属材质并且无磁场干扰，天线线路6工作性能好。并且，设置于压电片3表面的天线线路6，不额外占用空间，不增加压电扬声器的空间，有利于产品的薄型化设计，因此，本发明压电扬声器具有薄型化设计好，集成度高的优点。
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，对应天线线路6设置有第二焊盘52，压电片3与天线线路6分别通过独立的焊盘与导电端子5电结合，再通过导电端子5分别与外部电路电连接，因此，压电片3与天线线路6可相互独立工作。
作为一种优选，天线线路6为导电金属线路，在实际应用中，可以采用银、铜或导电合金等材料作为天线线路。可以通过LDS(激光直接成型)将天线线路6设置于压电片3上，也可以采用其他方式，均不影响本发明压电扬声器优点体现。
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。
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：所述压电片表面设置有天线线路，所述压电片与所述天线线路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天线线路分别设置有焊盘，所述压电片与所述天线线路通过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：所述天线线路为导电金属线路。
  4. 根据权利要求3所述的压电扬声器，其特征在于：所述天线线路为银、铜或导电合金。
  5. 根据权利要求1或3或4所述的压电扬声器，其特征在于：其特征在于：所述天线线路通过激光直接成型设置于所述压电片表面。
  6. 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。
  7. 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。
  8. 根据权利要求7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。
  9. 根据权利要求1所述的压电扬声器，其特征在于：所述振膜为高分子材料振膜。
  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。
PCT/CN2015/094537 2015-04-16 2015-11-13 压电扬声器 WO2016165320A1 (zh)

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Publication number Priority date Publication date Assignee Title
CN104811880A (zh) * 2015-04-16 2015-07-29 歌尔声学股份有限公司 压电扬声器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1520626A (zh) * 2001-06-29 2004-08-11 菲尔特朗尼克Lk有限公司 集成的无线电话结构
US20120174678A1 (en) * 2010-12-29 2012-07-12 University Of Central Florida Research Foundation, Inc. Wireless saw sensors having integrated antennas
CN203279168U (zh) * 2013-05-03 2013-11-06 瑞声声学科技(常州)有限公司 压电扬声器
CN104811880A (zh) * 2015-04-16 2015-07-29 歌尔声学股份有限公司 压电扬声器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1520626A (zh) * 2001-06-29 2004-08-11 菲尔特朗尼克Lk有限公司 集成的无线电话结构
US20120174678A1 (en) * 2010-12-29 2012-07-12 University Of Central Florida Research Foundation, Inc. Wireless saw sensors having integrated antennas
CN203279168U (zh) * 2013-05-03 2013-11-06 瑞声声学科技(常州)有限公司 压电扬声器
CN104811880A (zh) * 2015-04-16 2015-07-29 歌尔声学股份有限公司 压电扬声器

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