WO2020134464A1 - 发声器件 - Google Patents

发声器件 Download PDF

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Publication number
WO2020134464A1
WO2020134464A1 PCT/CN2019/113327 CN2019113327W WO2020134464A1 WO 2020134464 A1 WO2020134464 A1 WO 2020134464A1 CN 2019113327 W CN2019113327 W CN 2019113327W WO 2020134464 A1 WO2020134464 A1 WO 2020134464A1
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WO
WIPO (PCT)
Prior art keywords
driving unit
sound
diaphragm
piezoelectric
support member
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/CN2019/113327
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English (en)
French (fr)
Inventor
肖波
令狐荣林
刘晓东
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
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AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Pte Ltd
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Application filed by AAC Acoustic Technologies Shenzhen Co Ltd, AAC Technologies Pte Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2020134464A1 publication Critical patent/WO2020134464A1/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
    • H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Definitions

  • the utility model relates to the technical field of vibration sound production, in particular to a sound production device.
  • the sound-generating device includes a casing and a vibration system accommodated in the casing.
  • the vibration system generally includes a diaphragm and a single driving structure that drives the diaphragm to vibrate and sound.
  • the sound-emitting device with a single drive structure has a small driving force for driving the diaphragm to vibrate and sound, the vibration amplitude is low, and the product sensitivity is poor, which leads to the occurrence of defects such as product distortion.
  • the utility model aims to solve one of the technical problems existing in the prior art, and provides a novel sound-emitting device.
  • the present invention provides a sound-generating device, which includes a housing, a vibration system and a circuit board housed in the housing, the vibration system includes a diaphragm and a driving unit that drives the diaphragm to vibrate and sound
  • the driving unit includes a piezoelectric driving unit and a moving iron driving unit coupled in parallel with the piezoelectric driving unit.
  • the piezoelectric driving unit includes a piezoelectric sheet.
  • the moving iron driving unit includes a coil and a magnetic steel. The piezoelectric driving unit and the moving iron driving unit drive the diaphragm to vibrate and sound.
  • the piezoelectric driving unit includes a first base fixed to the housing and fixed to both ends of the piezoelectric sheet, extending from the piezoelectric sheet in the direction of the diaphragm and connected to the A first support connected to the diaphragm and a pressing block that fixes the piezoelectric sheet to the first base.
  • the first support is integrally formed with the piezoelectric sheet.
  • the moving iron drive unit includes a second base fixed to the housing and accommodating the coil, a pole core fixed to the housing and formed in a ring shape, and the magnetic steel is attached to the On both sides of the pole core, the magnetic steel extends perpendicular to the vibration direction of the diaphragm, and the moving iron drive unit further includes a tongue plate extending from the second base through the coil and the pole core, and A second support member extending from the tongue plate toward the diaphragm and connected to the diaphragm.
  • the tongue plate and the second base are integrally formed.
  • the second support is integrally formed with the tongue plate.
  • the housing includes a bottom wall and a side wall formed by bending and extending from the bottom wall, and the vertical distance between the tongue plate and the bottom wall is equal to the piezoelectric plate and the bottom wall The vertical distance between.
  • the length of the first support is equal to the length of the second support.
  • both the piezoelectric sheet and the tongue plate have a center line, and the first support and the second support are located at corresponding positions of the center line.
  • the diaphragm includes a ball top and a folded ring portion formed by bending and extending outward from the ball top, and the first support member and the second support member both abut on the ball top .
  • the sound-generating device of the present invention includes a housing and a vibration system accommodated in the housing, the vibration system includes a diaphragm and a driving unit that drives the diaphragm to vibrate and sound, the
  • the driving unit includes a piezoelectric driving unit and a moving iron driving unit coupled in parallel with the piezoelectric driving unit.
  • the piezoelectric driving unit includes a piezoelectric sheet.
  • the moving iron driving unit includes a coil and a magnetic steel. The piezoelectric The driving unit and the moving iron driving unit jointly drive the diaphragm to vibrate and sound.
  • the sound-generating device of the present invention can effectively increase the driving force, increase the amplitude of vibration, increase the sensitivity of the product, widen the corresponding range, and at the same time, can effectively increase the driving fulcrum and improve the vibration Balance, improve product distortion.
  • Figure 1 is a perspective structural view of the sound-generating device in the present invention
  • FIG. 2 is a cross-sectional view along AA direction in FIG. 1;
  • FIG. 3 is an exploded perspective view of the sound-generating device of the present invention.
  • FIG. 4 is a partial schematic diagram of the sound-generating device of the present invention.
  • the sound-emitting device 100 includes a housing 110, a vibration system 120 housed in the housing 110, a cover plate 130 covered on the housing 110, and a circuit board 140.
  • the vibration system 120 includes a diaphragm 121, a ball top 122 located below the diaphragm 121, and a driving unit that drives the diaphragm 121 to vibrate and sound.
  • the driving unit includes a piezoelectric driving unit 123 and A piezoelectric iron driving unit 123 is coupled in parallel with a moving iron driving unit 124.
  • the piezoelectric driving unit 123 includes a piezoelectric sheet 123b.
  • the moving iron driving unit 124 includes a coil 124b and a magnetic steel 124d.
  • the piezoelectric driving unit 123 and the moving iron driving unit 124 jointly drive the diaphragm 121 to vibrate and sound.
  • the driving unit of the vibration system 120 includes a piezoelectric driving unit 123 and a moving iron driving unit 124 coupled in parallel with the piezoelectric driving unit 123.
  • the piezoelectric driving unit 123 includes piezoelectric
  • the moving iron driving unit 124 includes a coil 124b and a magnetic steel 124d.
  • the piezoelectric driving unit 123 and the moving iron driving unit 124 jointly drive the diaphragm 121 to vibrate and sound.
  • the sound-generating device 100 of this embodiment can effectively increase the driving force, increase the vibration amplitude, increase the sensitivity of the product, and broaden the corresponding range.
  • the sound-generating device 100 with a dual driving structure It can also effectively increase the driving fulcrum, improve vibration balance and improve product distortion.
  • the piezoelectric driving unit 123 includes a first base 123 a fixed to the housing 110 and fixed to both ends of the piezoelectric sheet 123 b,
  • the piezoelectric piece 123b extends toward the diaphragm 121 and is connected to the diaphragm 121 by a first support 123c and a pressing block 123d that fixes the piezoelectric piece 123b to the first base 123a.
  • the piezoelectric effect of the piezoelectric sheet 123b can be twisted and deformed, so that the first support 123c located on the piezoelectric sheet 123b can drive the diaphragm 121 to vibrate and sound.
  • the first support 123c may have a columnar structure.
  • the first support 123c may also have other structures, which can be determined according to actual needs.
  • the first support 123c may be integrally formed with the piezoelectric sheet 123b.
  • the moving iron drive unit 124 includes a second base 124 a fixed to the housing 110 and accommodating the coil 124 b, and fixed to the housing 110 in a ring shape Shaped pole core 124c, the magnetic steel 124d is attached to both sides of the pole core 124c, the magnetic steel 124d extends perpendicular to the vibration direction of the diaphragm 121, and the moving iron drive unit 124 further includes
  • the second base 124a passes through the coil 124b, the pole plate 124c extending from the tongue plate 124e, and a second support member extending from the tongue plate 124e toward the diaphragm 121 and connected to the diaphragm 121 124f.
  • the tongue plate 124e when an electric current passes through the coil 124b, the tongue plate 124e is polarized, so that it can interact with the magnetic field of the magnetic steel 124d, which in turn can push the tongue plate 124e to generate corresponding vibration.
  • the vibration of the tongue plate 124e can drive the
  • the upper second support 124f vibrates, which can drive the diaphragm 121 to vibrate and sound.
  • the tongue plate 124e may be integrally formed with the second base 124a.
  • the second support 124f may be integrally formed with the tongue 124e.
  • the housing 110 includes a bottom wall 111 and a side wall 112 formed by bending and extending from the bottom wall 111.
  • the tongue plate 124e and The vertical distance between the bottom wall 111 is equal to the vertical distance between the piezoelectric sheet 123b and the bottom wall 111.
  • the length of the first support 123c is equal to the length of the second support 124f.
  • the piezoelectric piece 123b and the tongue plate 124e each have a center line, and the first support 123c and the second support 124f are both located at corresponding positions of the center line.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Electromagnetism (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本申请提供一种发声器件，包括壳体、收容于所述壳体内的振动系统以及电路板，所述振动系统包括振膜以及驱动所述振膜振动发声的驱动单元，所述驱动单元包括压电驱动单元以及与所述压电驱动单元并联耦合的动铁驱动单元。本申请的发声器件，可以有效增加驱动力，增大振动幅度，提升产品灵敏度，拓宽相应范围，同时，还能够有效增加驱动支点，改善振动平衡性，改善产品失真。

Description

发声器件 技术领域
本实用新型涉及振动发声技术领域，具体涉及一种发声器件。
 背景技术
传统地，发声器件包括壳体以及收容于所述壳体内的振动系统，所述振动系统一般包括振膜以及驱动振膜振动发声的单驱动结构。
显然，单驱动结构的发声器件，其驱动振膜振动发声的驱动力较小，振动幅度较低，产品灵敏度较差，导致产品容易失真等不良的发生。
 技术问题
本实用新型旨在解决现有技术中存在的技术问题之一，而提供一种新型的发声器件。
 技术解决方案
为实现上述目的，本实用新型提供了一种发声器件，包括壳体、收容于所述壳体内的振动系统以及电路板，所述振动系统包括振膜以及驱动所述振膜振动发声的驱动单元，所述驱动单元包括压电驱动单元以及与所述压电驱动单元并联耦合的动铁驱动单元，所述压电驱动单元包括压电片，所述动铁驱动单元包括线圈以及磁钢，所述压电驱动单元与所述动铁驱动单元共同驱动所述振膜振动发声。
可选地，所述压电驱动单元包括固定于所述壳体且与所述压电片的两端固定的第一基座、自所述压电片向所述振膜方向延伸并与所述振膜连接的第一支撑件以及将所述压电片固定于所述第一基座的压块。
可选地，所述第一支撑件与所述压电片一体成型。
可选地，所述动铁驱动单元包括固定于所述壳体且收容所述线圈的第二基座、固定于所述壳体且呈环状的极芯，所述磁钢贴设于所述极芯的两侧，所述磁钢沿垂直于振膜的振动方向延伸，所述动铁驱动单元还包括自所述第二基座穿过所述线圈、极芯延伸出来的舌板以及自所述舌板向所述振膜方向延伸并与所述振膜连接的第二支撑件。
可选地，所述舌板与第二基座一体成型。
可选地，所述第二支撑件与所述舌板一体成型。
可选地，所述壳体包括底壁以及自所述底壁弯折延伸形成的侧壁，所述舌板与所述底壁之间的垂直距离等于所述压电片与所述底壁之间的垂直距离。
可选地，所述第一支撑件的长度等于所述第二支撑件的长度。
可选地，所述压电片和所述舌板均具有中线，所述第一支撑件和所述第二支撑件均位于对应的所述中线位置处。
可选地，所述振膜包括球顶部以及自所述球顶部向外侧弯折延伸形成的折环部，所述第一支撑件和所述第二支撑件均抵接于所述球顶部。
 有益效果
本实用新型的有益效果是：本实用新型的发声器件，包括壳体以及收容于所述壳体内的振动系统，所述振动系统包括振膜以及驱动所述振膜振动发声的驱动单元，所述驱动单元包括压电驱动单元以及与所述压电驱动单元并联耦合的动铁驱动单元，所述压电驱动单元包括压电片，所述动铁驱动单元包括线圈以及磁钢，所述压电驱动单元与所述动铁驱动单元共同驱动所述振膜振动发声。这样，相比传统的单驱动结构的发声器件，本实用新型的发声器件，可以有效增加驱动力，增大振动幅度，提升产品灵敏度，拓宽相应范围，同时，还能够有效增加驱动支点，改善振动平衡性，改善产品失真。
 附图说明
图1是本实用新型中发声器件的立体结构图；
图2是图1中沿AA方向的剖视图；
图3是本实用新型发声器件的立体分解图；
图4是本实用新型发声器件的局部示意图。
 本发明的实施方式
下面结合图1至图4对本实用新型作详细描述。
本实用新型涉及一种发声器件。如图1和图2所示，该发声器件100包括壳体110、收容于所述壳体110内的振动系统120、盖设在所述壳体110上的盖板130以及电路板140。其中，所述振动系统120包括振膜121、位于所述振膜121下方的球顶部122以及驱动所述振膜121振动发声的驱动单元，所述驱动单元包括压电驱动单元123以及与所述压电驱动单元123并联耦合的动铁驱动单元124，所述压电驱动单元123包括压电片123b，所述动铁驱动单元124包括线圈124b以及磁钢124d。所述压电驱动单元123和所述动铁驱动单元124共同驱动所述振膜121振动发声。
本实施例结构的发声器件100，其振动系统120的驱动单元包括压电驱动单元123以及与所述压电驱动单元123并联耦合的动铁驱动单元124，所述压电驱动单元123包括压电片123b，所述动铁驱动单元124包括线圈124b以及磁钢124d，所述压电驱动单元123和所述动铁驱动单元124共同驱动所述振膜121振动发声。这样，相比传统的单驱动结构的发声器件，本实施例的发声器件100，可以有效增加驱动力，增大振动幅度，提升产品灵敏度，拓宽相应范围，同时，双驱动结构的发声器件100，还能够有效增加驱动支点，改善振动平衡性，改善产品失真。
具体地，如图2、图3和图4所示，所述压电驱动单元123包括固定于所述壳体110且与所述压电片123b的两端固定的第一基座123a、自所述压电片123b向所述振膜121方向延伸并与所述振膜121连接的第一支撑件123c以及将所述压电片123b固定于所述第一基座123a的压块123d。这样，可以通过压电片123b的压电效应，使得其发生扭曲变形，从而可以带动位于压电片123b上的第一支撑件123c驱动振膜121振动发声。
如图2和图4所示，所述第一支撑件123c可以呈柱状结构。当然，除此以外，第一支撑件123c也可以呈其他结构，可以根据实际需要进行确定。为了简化压电驱动单元123的结构，所述第一支撑件123c可以与压电片123b一体成型。
如图2、图3和图4所示，所述动铁驱动单元124包括固定于所述壳体110且收容所述线圈124b的第二基座124a、固定于所述壳体110且呈环状的极芯124c，所述磁钢124d贴设于所述极芯124c的两侧，所述磁钢124d沿垂直于振膜121的振动方向延伸，所述动铁驱动单元124还包括自所述第二基座124a穿过所述线圈124b、极芯124c延伸出来的舌板124e以及自所述舌板124e向所述振膜121方向延伸并与所述振膜121连接的第二支撑件124f。这样，当有电流通过线圈124b时，舌板124e发生极化，从而可以与磁钢124d的磁场产生相互作用，进而可以推动舌板124e产生对应的振动，舌板124e的振动可以带动设置在其上的第二支撑件124f振动，可以带动振膜121振动发声。
为了简化动铁驱动单元124的结构，舌板124e可以与第二基座124a一体成型。此外，所述第二支撑件124f也可以与所述舌板124e一体成型。
如图2和图3所示，所述壳体110包括底壁111以及自所述底壁111弯折延伸形成的侧壁112，为了提高发声器件100的振动发声性能，所述舌板124e与所述底壁111之间的垂直距离等于所述压电片123b与所述底壁111之间的垂直距离。此外，所述第一支撑件123c的长度等于所述第二支撑件124f的长度。并且，进一步地，所述压电片123b和所述舌板124e均具有中线，所述第一支撑件123c和所述第二支撑件124f均位于对应的所述中线位置处。
以上所述的仅是本实用新型的实施方式，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，还可以做出改进，但这些均属于本实用新型的保护范围。

Claims (10)

  1. 一种发声器件，包括壳体、收容于所述壳体内的振动系统以及电路板，所述振动系统包括振膜以及驱动所述振膜振动发声的驱动单元，其特征在于，所述驱动单元包括压电驱动单元以及与所述压电驱动单元并联耦合的动铁驱动单元，所述压电驱动单元包括压电片，所述动铁驱动单元包括线圈以及磁钢，所述压电驱动单元与所述动铁驱动单元共同驱动所述振膜振动发声。
  2. 根据权利要求1所述的发声器件，其特征在于，所述压电驱动单元包括固定于所述壳体且与所述压电片的两端固定的第一基座、自所述压电片向所述振膜方向延伸并与所述振膜连接的第一支撑件以及将所述压电片固定于所述第一基座的压块。
  3. 根据权利要求2所述的发声器件，其特征在于，所述第一支撑件与所述压电片一体成型。
  4. 根据权利要求2或3所述的发声器件，其特征在于，所述动铁驱动单元包括固定于所述壳体且收容所述线圈的第二基座、固定于所述壳体且呈环状的极芯，所述磁钢贴设于所述极芯的两侧，所述磁钢沿垂直于振膜的振动方向延伸，所述动铁驱动单元还包括自所述第二基座穿过所述线圈、极芯延伸出来的舌板以及自所述舌板向所述振膜方向延伸并与所述振膜连接的第二支撑件。
  5. 根据权利要求4所述的发声器件，其特征在于，所述舌板与第二基座一体成型。
  6. 根据权利要求4所述的发声器件，其特征在于，所述第二支撑件与所述舌板一体成型。
  7. 根据权利要求4所述的发声器件，其特征在于，所述壳体包括底壁以及自所述底壁弯折延伸形成的侧壁，所述舌板与所述底壁之间的垂直距离等于所述压电片与所述底壁之间的垂直距离。
  8. 根据权利要求4所述的发声器件，其特征在于，所述第一支撑件的长度等于所述第二支撑件的长度。
  9. 根据权利要求4所述的发声器件，其特征在于，所述压电片和所述舌板均具有中线，所述第一支撑件和所述第二支撑件均位于对应的所述中线位置处。
  10. 根据权利要求4所述的发声器件，其特征在于，所述振膜包括球顶部以及自所述球顶部向外侧弯折延伸形成的折环部，所述第一支撑件和所述第二支撑件均抵接于所述球顶部。
PCT/CN2019/113327 2018-12-28 2019-10-25 发声器件 Ceased WO2020134464A1 (zh)

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CN115086840A (zh) * 2021-03-15 2022-09-20 华为技术有限公司 一种发声装置
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