WO2020134456A1 - 发声器件 - Google Patents

发声器件 Download PDF

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Publication number
WO2020134456A1
WO2020134456A1 PCT/CN2019/113313 CN2019113313W WO2020134456A1 WO 2020134456 A1 WO2020134456 A1 WO 2020134456A1 CN 2019113313 W CN2019113313 W CN 2019113313W WO 2020134456 A1 WO2020134456 A1 WO 2020134456A1
Authority
WO
WIPO (PCT)
Prior art keywords
piezoelectric ceramic
ceramic sheet
sound
diaphragm
pad
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/113313
Other languages
English (en)
French (fr)
Inventor
肖波
刘晓东
令狐荣林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Technologies Pte Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AAC Acoustic Technologies Shenzhen Co Ltd, AAC Technologies Pte Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2020134456A1 publication Critical patent/WO2020134456A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/026—Supports for loudspeaker casings
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/853—Ceramic compositions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the utility model relates to the technical field of electroacoustic devices, in particular to an audible device.
  • a sound-generating device is an electro-acoustic device that converts an audio electrical signal into a sound signal, and is widely used in communication terminal devices such as mobile phones, fixed telephones, and headsets to realize audio output.
  • a common sound-generating device generally uses a driving structure in which a voice coil and a magnetic steel are combined, and an electromagnetic induction force is generated between the energization of the voice coil and the magnetic steel, thereby driving the diaphragm to vibrate and sound.
  • the sound-generating device of the related art uses a piezoelectric ceramic sheet as a driving structure instead of a combination of a voice coil and a magnetic steel, a transmission member is provided on the piezoelectric ceramic sheet to abut against the diaphragm, and the piezoelectric ceramic sheet is energized to generate deformation and be transmitted to The diaphragm, thereby driving the diaphragm to vibrate and sound.
  • abutment position of a single transmission member and the diaphragm is very critical. If the abutment position is poor, the vibration of the diaphragm is likely to be distorted, the driving force is insufficient, and the sensitivity is poor.
  • the present invention provides a sound-generating device, which includes a bottom plate, a pad fixed on the bottom plate, a frame provided on the pad and a diaphragm fixed on the frame, the sound-emitting device also It includes a first piezoelectric ceramic piece and a second piezoelectric ceramic piece fixed on the edge of the pad, and the first piezoelectric ceramic piece and the second piezoelectric ceramic piece Describe the transmission of the diaphragm.
  • the first piezoelectric ceramic sheet and the second piezoelectric ceramic sheet are arranged in parallel.
  • the first piezoelectric ceramic sheet and the second piezoelectric ceramic sheet are connected by a connecting portion, the connecting portion is provided on the outer wall surface of the frame or the outer wall surface of the pad on.
  • the first piezoelectric ceramic sheet and the second piezoelectric ceramic sheet are connected in parallel.
  • the first piezoelectric ceramic sheet and the second piezoelectric ceramic sheet are further provided with a pressing block, the pressing block presses the first piezoelectric ceramic sheet and the second pressing block The electric ceramic sheet is pressed against the edge of the pad.
  • the diaphragm includes a dome and a folding ring disposed around the dome, the transmission member is cylindrical and abuts to the dome.
  • the transmission members are respectively disposed in central regions of the first piezoelectric ceramic sheet and the second piezoelectric ceramic sheet.
  • the sound-generating device of the present invention can increase the driving force, increase the amplitude of vibration, improve product sensitivity, broaden the response range; increase the driving fulcrum, improve vibration balance, and improve product distortion.
  • FIG. 1 is an exploded schematic view of the three-dimensional structure of the sound-generating device of the present invention
  • FIG. 2 is a schematic view of a partial stereo structure of a sound-generating device of the present invention.
  • FIG. 3 is a schematic cross-sectional structure diagram of the sound-generating device of the present invention.
  • the present invention provides a sound-emitting device
  • the sound-emitting device includes a bottom plate 1, a pad 2 fixed on the bottom plate 1, the first pressure is arranged at intervals on the pad 2
  • the electroceramic sheet 3 and the second piezoelectric ceramic sheet 4 the frame 5 provided on the pad 2, the diaphragm 9 fixed to the frame 5, and the front cover 1 pressed on the diaphragm 9
  • the pad 2 and the frame 5 are both hollow ring-shaped members, the orthographic outer contour of the pad 2 on the bottom plate 1 and the frame 5
  • the orthographic outer contour lines on the bottom plate 1 coincide, and the orthographic inner contour lines of the pad 2 on the bottom plate 1 are closer to the center side than the outer projection lines of the frame 5 on the bottom plate 1
  • the first piezoelectric ceramic sheet 3 and The second piezoelectric ceramic sheet 4 is provided with a pressing block 6 against the inner wall surface of the frame 5 , and the pressing block 6 presses the first piezoelectric ceramic sheet 3 and the second piezoelectric ceramic sheet 4 against the pad 2
  • a piezoelectric ceramic piece 3 and a central area on the second piezoelectric ceramic piece 4 are also provided with a transmission member 7 in contact with the diaphragm 9 ; the first piezoelectric ceramic piece 3 and the second piezoelectric ceramic piece 4 are connected in parallel
  • the driving diaphragm 9 is preferably arranged in parallel with the first piezoelectric ceramic sheet 3 and the second
  • the diaphragm 9 includes a dome 91 and a fold ring 92 bent and extending from the dome 91, the dome 91 and the fold ring 92 may be a split structure or an integrated structure; the transmission member 7 It is cylindrical and abuts against the dome 91 of the diaphragm 9.
  • the first piezoelectric ceramic sheet 3 and the second piezoelectric ceramic sheet 4 are connected by a connecting portion 8, preferably, the connecting portion 8 is provided on the outer wall surface of the frame 5, and the first piezoelectric The ceramic sheet 3 and the second piezoelectric ceramic sheet 4 are connected; in other embodiments, the connecting portion 8 may also be provided on the outer wall surface of the pad 2.
  • the connecting portion 8 can be used as an electrical connection end of the piezoelectric ceramic sheet, and at the same time, the relative position of the two piezoelectric ceramic sheets can be ensured.
  • the sound-generating device of the present invention can increase the driving force, increase the vibration amplitude, increase the sensitivity of the product, and broaden the response range; increase the driving fulcrum, improve the vibration balance, and improve the product distortion.

Landscapes

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

Abstract

本实用新型提供一种发声器件，其包括底板、固定于底板上的垫边、设置于垫边上的框架及固定于框架的振膜，所述发声器件还包括固定于所述垫边上的间隔设置的第一压电陶瓷片和第二压电陶瓷片，所述第一压电陶瓷片和所述第二压电陶瓷片上分别设有抵接于所述振膜的传动件。本实用新型的发声器件能够增加驱动力，增大振动幅度，提升产品灵敏度，拓宽响应范围；增加驱动止点，改善振动平衡性，改善产品失真。

Description

发声器件
技术领域
[0001] 本实用新型涉及电声器件技术领域， 特别地涉及一种发声器件。
背景技术
[0002] 发声器件是一种将音频电信号转换成声音信号的电声器件， 广泛应用于移动电 话、 固定电话、 耳机等通信终端设备中， 实现音频的输出。
[0003] 常见的发声器件通常使用音圈和磁钢组合的驱动结构， 音圈通电与磁钢之间产 生电磁感应力， 从而驱动振膜振动发声。
发明概述
技术问题
[0004] 相关技术的发声器件采用压电陶瓷片作为驱动结构替代音圈和磁钢的组合， 压 电陶瓷片上设置传动件抵接于振膜， 压电陶瓷片通电产生形变通过传动件传递 给振膜， 从而驱动振膜振动发声。 然而， 单个传动件与振膜的抵接位置非常关 键， 抵接位置不良的话容易造成振膜的振动不良产生失真， 驱动力不足， 灵敏 度差。
[0005] 因此， 有必要提供一种改进了驱动结构的新的发声器件。
问题的解决方案
技术解决方案
[0006] 为了解决上述问题， 本实用新型提供了一种发声器件， 其包括底板、 固定于底 板上的垫边、 设置于垫边上的框架及固定于框架的振膜， 所述发声器件还包括 固定于所述垫边上的间隔设置的第一压电陶瓷片和第二压电陶瓷片， 所述第一 压电陶瓷片和所述第二压电陶瓷片上分别设有抵接于所述振膜的传动件。
[0007] 作为一种改进， 所述第一压电陶瓷片和所述第二压电陶瓷片平行设置。
[0008] 作为一种改进， 所述第一压电陶瓷片和所述第二压电陶瓷片通过连接部相连， 该连接部设置在所述框架的外壁面上或者所述垫边的外壁面上。
[0009] 作为一种改进， 所述第一压电陶瓷片和所述第二压电陶瓷片并联连接。 [0010] 作为一种改进， 所述第一压电陶瓷片和所述第二压电陶瓷片上还设有压块， 所 述压块将所述第一压电陶瓷片和所述第二压电陶瓷片抵压于所述垫边上。
[0011] 作为一种改进， 所述振膜包括球顶及围绕所述球顶设置的折环， 所述传动件为 柱体状且抵接至所述球顶。
[0012] 作为一种改进， 所述传动件分别设置在所述第一压电陶瓷片和所述第二压电陶 瓷片的中央区域。
发明的有益效果
有益效果
[0013] 本实用新型的有益效果是： 本实用新型的发声器件能够增加驱动力， 增大振动 幅度， 提升产品灵敏度， 拓宽响应范围； 增加驱动支点， 改善振动平衡性， 改 善产品失真。 对附图的简要说明
附图说明
[0014] 图 1为本实用新型的发声器件的立体结构分解示意图；
[0015] 图 2为本实用新型的发声器件的局部立体结构示意图；
[0016] 图 3为本实用新型的发声器件的剖面结构示意图。
发明实施例
具体实施方式
[0017] 下面通过具体实施方式结合附图对本实用新型作进一步详细说明， 以便能够更 好地理解本实用新型的方案以及其各方面的优点。 另外， 提供以下具体实施方 式的目的是便于对本实用新型的内容更清楚透彻的理解， 而不是对本实用新型 的限制。
[0018] 如图 1至图 3所示， 本实用新型提供了一种发声器件， 该发声器件包括底板 1、 固定于底板 1上的垫边 2、 间隔设置在垫边 2上的第一压电陶瓷片 3和第二压电陶 瓷片 4、 设置于垫边 2上的框架 5、 固定于框架 5的振膜 9及压设在振膜 9上的前盖 1
0。
[0019] 垫边 2和框架 5均为中空环状构件， 垫边 2在底板 1上的正投影外轮廓线与框架 5 在底板 1上的正投影外轮廓线重合， 垫边 2在底板 1上的正投影内轮廓线比框架 5 在底板 1上的正投影外轮廓线靠近中心侧； 第一压电陶瓷片 3和第二压电陶瓷片 4 上设有抵靠框架 5内壁面的压块 6 , 压块 6将第一压电陶瓷片 3和第二压电陶瓷片 4 抵压于垫边 2上； 在第一压电陶瓷片 3和第二压电陶瓷片 4上的中央区域还分别设 有与振膜 9相抵接的传动件 7 ; 第一压电陶瓷片 3和第二压电陶瓷片 4并联连接驱 动振膜 9 , 优选的， 第一压电陶瓷片 3和第二压电陶瓷片 4平行设置， 压电陶瓷片 通电后发生形变， 通过传动件 7传递到振膜 9。
[0020] 进一步地， 振膜 9包括球顶 91和自该球顶 91弯折延伸的折环 92 , 球顶 91和折环 9 2可以为分体结构， 也可以为一体结构； 传动件 7为柱体状且抵接至振膜 9的球顶 91。
[0021] 在本实施方式中， 第一压电陶瓷片 3和第二压电陶瓷片 4通过连接部 8相连， 优 选地， 连接部 8设置在框架 5的外壁面， 并将第一压电陶瓷片 3和第二压电陶瓷片 4相连； 在其它实施方式中， 连接部 8还可以设置在垫边 2的外壁面。 连接部 8可 以用作压电陶瓷片的电连接端， 同时也可保证两个压电陶瓷片的相对位置。 上 述仅用于说明， 不能理解成对本实用新型的限制。
[0022] 与现有技术相比， 本实用新型的发声器件能够增加驱动力， 增大振动幅度， 提 升产品灵敏度， 拓宽响应范围； 增加驱动支点， 改善振动平衡性， 改善产品失 真。
[0023] 在此应当指出， 对于本领域的普通技术人员来说， 在不脱离本实用新型创造构 思的前提下， 可以做出各种更改和变化， 但这些均属于实用新型的保护范围。

Claims

权利要求书
[权利要求 1] 一种发声器件， 其包括底板、 固定于底板上的垫边、 设置于垫边上的 框架及固定于框架的振膜， 其特征在于， 所述发声器件还包括固定于 所述垫边上的间隔设置的第一压电陶瓷片和第二压电陶瓷片， 所述第 一压电陶瓷片和所述第二压电陶瓷片上分别设有抵接于所述振膜的传 动件。
[权利要求 2] 根据权利要求 1所述的发声器件， 其特征在于， 所述第一压电陶瓷片 和所述第二压电陶瓷片平行设置。
[权利要求 3] 根据权利要求 1所述的发声器件， 其特征在于， 所述第一压电陶瓷片 和所述第二压电陶瓷片通过连接部相连， 该连接部设置在所述框架的 外壁面上或者所述垫边的外壁面上。
[权利要求 4] 根据权利要求 1所述的发声器件， 其特征在于， 所述第一压电陶瓷片 和所述第二压电陶瓷片并联连接。
[权利要求 5] 根据权利要求 1所述的发声器件， 其特征在于， 所述第一压电陶瓷片 和所述第二压电陶瓷片上还设有压块， 所述压块将所述第一压电陶瓷 片和所述第二压电陶瓷片抵压于所述垫边上。
[权利要求 6] 根据权利要求 1所述的发声器件， 其特征在于， 所述振膜包括球顶及 围绕所述球顶设置的折环， 所述传动件为柱体状且抵接至所述球顶。
[权利要求 7] 根据权利要求 1所述的发声器件， 其特征在于， 所述传动件分别设置 在所述第一压电陶瓷片和所述第二压电陶瓷片的中央区域。
PCT/CN2019/113313 2018-12-28 2019-10-25 发声器件 Ceased WO2020134456A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201822240240.5 2018-12-28
CN201822240240.5U CN209390312U (zh) 2018-12-28 2018-12-28 发声器件

Publications (1)

Publication Number Publication Date
WO2020134456A1 true WO2020134456A1 (zh) 2020-07-02

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US (1) US11109161B2 (zh)
CN (1) CN209390312U (zh)
WO (1) WO2020134456A1 (zh)

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CN209390312U (zh) * 2018-12-28 2019-09-13 瑞声科技(新加坡)有限公司 发声器件
CN112261560B (zh) * 2020-09-28 2022-03-25 瑞声科技（南京）有限公司 发声装置及电子设备
CN114697830B (zh) * 2020-12-28 2023-06-06 华为技术有限公司 扬声器及电子设备
US20240236579A9 (en) * 2022-10-24 2024-07-11 Dell Products L.P. Balance structure to increase speaker rated power

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US20170265007A1 (en) * 2014-11-20 2017-09-14 Goertek, Inc. Speaker Structure
CN206302568U (zh) * 2016-11-11 2017-07-04 歌尔科技有限公司 一种压电式发声装置
CN107566965A (zh) * 2017-08-24 2018-01-09 努比亚技术有限公司 一种振动发声装置和移动终端
CN107820184A (zh) * 2017-11-28 2018-03-20 歌尔股份有限公司 一种压电发声装置
CN209390312U (zh) * 2018-12-28 2019-09-13 瑞声科技(新加坡)有限公司 发声器件

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US20200213767A1 (en) 2020-07-02
US11109161B2 (en) 2021-08-31

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