WO2022000779A1 - 发声器件 - Google Patents

发声器件 Download PDF

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Publication number
WO2022000779A1
WO2022000779A1 PCT/CN2020/114321 CN2020114321W WO2022000779A1 WO 2022000779 A1 WO2022000779 A1 WO 2022000779A1 CN 2020114321 W CN2020114321 W CN 2020114321W WO 2022000779 A1 WO2022000779 A1 WO 2022000779A1
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WO
WIPO (PCT)
Prior art keywords
sound
front cover
away
diaphragm
metal front
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/CN2020/114321
Other languages
English (en)
French (fr)
Inventor
张龙
朱俊杰
董献杰
杨虎虎
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
Original Assignee
AAC Acoustic Technologies Shenzhen Co 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 filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022000779A1 publication Critical patent/WO2022000779A1/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
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • 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
    • H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
    • 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
    • H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones

Definitions

  • the invention relates to the field of electro-acoustic conversion, in particular to a sound-emitting device used in electronic sound box products.
  • Sound-emitting devices also known as speakers or horns, are used in speakers to convert audio signals into sound for playback.
  • the sound-generating device of the related art includes a sound-generating unit, the sound-generating unit includes a vibrating membrane for vibrating and producing sound, and the sound-generating device further includes a front cover which is covered and formed by the vibrating membrane and the vibrating membrane together to form a sound-generating front cavity.
  • the front cover is provided with a sound outlet hole therethrough, and the sound outlet hole communicates the sound-emitting front cavity with the outside world.
  • the front cover is made of plastic, and its thickness is relatively large, resulting in a larger external dimension of the entire sound-emitting device.
  • the purpose of the present invention is to provide a sound-generating device with a smaller volume.
  • the present invention provides a sound-generating device, which includes a sound-generating unit, the sound-generating unit includes a vibrating membrane for vibrating sound, and the sound-generating device further includes a cover disposed on the vibrating membrane away from the A metal front cover on one side of the sounding unit and a sealing layer attached to the side of the metal front cover away from the diaphragm, the metal front cover and the diaphragm are spaced apart to form a sounding front cavity, and the metal front cover There is a sound outlet passing through it and opposite to the diaphragm, the sound outlet communicates the sounding front cavity with the outside world, and the sealing layer is located on the metal front cover along the vibration direction of the diaphragm.
  • the orthographic projection is completely within the confines of the metal front cover.
  • the metal front cover includes a front cover plate spaced from the diaphragm and a surrounding wall that is bent and extended from the periphery of the front cover plate toward the diaphragm, and the sound outlet penetrates through the diaphragm.
  • the front cover is arranged, the sealing layer is attached to the side of the front cover away from the surrounding wall, and the end of the surrounding wall away from the front cover abuts against the diaphragm.
  • the sound-generating unit further includes a basin frame for supporting and fixing the vibrating membrane
  • the vibrating membrane includes a vibrating part, a folded ring part bent and extended outward from the periphery of the vibrating part, and the folded ring a first fixing part extending from the side of the first fixing part away from the vibrating part, and a second fixing part extending along the outer circumference of the basin frame from the side of the first fixing part away from the ring
  • the first fixing part is sandwiched between the surrounding wall and the basin frame, and the second fixing part is attached to the outer peripheral side of the basin frame.
  • the metal front cover further includes an extension wall extending from the peripheral side of the surrounding wall along the second fixing portion, the extension wall and the second fixing portion are spaced apart, and the extension wall is connected to the second fixing portion.
  • the basin frames together form an accommodation space, and the accommodation space is filled with glue to achieve sealing.
  • the metal front cover further comprises a first fixed edge bent and extended from one end of the extension wall away from the surrounding wall in a direction away from the sound-emitting unit, and a first fixed edge extending away from the extension One end of the wall is bent and extended in a direction away from the extension wall, and the auxiliary extension wall is enclosed with the first fixed edge to form a step.
  • the sound-generating device further includes a ventilating spacer that is covered and fixed on the metal front cover and together encloses a receiving cavity, and the sound-generating unit is contained in the receiving cavity.
  • a ventilating spacer that is covered and fixed on the metal front cover and together encloses a receiving cavity, and the sound-generating unit is contained in the receiving cavity.
  • the ventilating spacer includes a bottom plate spaced from the front cover plate, a side wall bent and extended from the peripheral edge of the bottom plate toward the extending wall, and an end of the side wall away from the bottom plate
  • the second fixing edge is bent and extended in the direction away from the sounding unit
  • the metal front cover also includes a first end bent and extended in the direction away from the sounding unit from the end of the extension wall away from the surrounding wall.
  • a fixed edge, the first fixed edge and the second fixed edge are glued and fixed.
  • the sound-generating device of the present invention includes a metal front cover that is covered on the side of the diaphragm away from the sound-generating unit, and a metal front cover that is attached to the side of the metal front cover away from the diaphragm.
  • the metal front cover is spaced from the diaphragm to form a sound-emitting front cavity, the metal front cover is provided with a sound-outlet hole passing through it and opposite to the diaphragm, and the sound-outlet hole separates the
  • the sounding front cavity is communicated with the outside world, and the orthographic projection of the sealing layer on the metal front cover along the vibration direction of the diaphragm is completely within the range of the metal front cover; that is, the front cover is made of metal material;
  • the sealing layer ensures sealing and waterproofing, and its orthographic projection on the metal front cover along the vibration direction of the diaphragm is completely within the range of the metal front cover; that is, this structure is adopted to ensure that the sound-emitting device is sealed and waterproof. Under the premise of reducing its external size, the volume of the entire sound-emitting device is reduced.
  • FIG. 1 is a schematic diagram of the three-dimensional structure of a sound-emitting device and a mobile terminal according to the present invention
  • FIG. 2 is an exploded view of a partial three-dimensional structure of the sound-emitting device and the mobile terminal of the present invention
  • Fig. 3 is the enlarged schematic diagram of B in Fig. 2;
  • Fig. 4 is a sectional view along Fig. 1;
  • Fig. 5 is the enlarged schematic diagram of C in Fig. 4;
  • FIG. 6 is a schematic three-dimensional structure diagram of another sound-emitting device and a mobile terminal of the present invention.
  • FIG. 7 is a cross-sectional view of FIG. 6 .
  • the present invention provides a sound-generating device 100, which includes a sound-generating unit 1, a metal front cover 2 and a sealing layer 4, and the sound-generating unit 1 includes a vibrating membrane 11 for vibrating sound and a The basin frame 12 for supporting and fixing the diaphragm 11 is supported.
  • the vibrating membrane 11 includes a vibrating portion 111 , a ring portion 112 that is bent and extended outward from the periphery of the vibrating portion 111 , and a first fixing portion extending from the side of the ring portion 112 away from the vibrating portion 111 . part 113; and a second fixing part 114 extending along the outer peripheral side of the basin frame 1 from the side of the first fixing part 113 away from the folded ring part 113, the second fixing part 114 is attached to the
  • the outer peripheral side of the basin frame 1 that is, the diaphragm 11 and the basin frame 12 are designed with edging. Its sealing effect is better.
  • the metal front cover 2 is covered on the side of the diaphragm 11 away from the sounding unit 1, and is spaced from the diaphragm 11 to form a sounding front cavity 10.
  • the sound-emitting hole 21 opposite the diaphragm 11 communicates the sound-emitting front cavity 10 with the outside world. That is to say, the front cover is made of metal material.
  • the external size of the sound-emitting device 100 is reduced, and the volume of the entire sound-emitting device 100 is reduced. As shown in FIG.
  • the metal front cover 2 exceeds all
  • the size of the sounding monomer 1 is a, and its a value is 0.2 mm, while the a value in the related art is 0.7 mm, that is, the shape of the present invention is 0.5 mm smaller than that in the related art under the condition of sealing.
  • the metal front cover 2 includes a front cover plate 22 spaced from the diaphragm 11 , a surrounding wall 23 bent and extended from the periphery of the front cover plate 22 to the direction of the diaphragm 11 ,
  • the extension wall 24 extending from the peripheral side of the surrounding wall 23 along the second fixing portion 114 , and the first extension wall 24 bending and extending from the end of the extension wall 24 away from the surrounding wall 23 in the direction away from the sounding unit 1 .
  • the fixed edge 25 and the auxiliary extension wall 26 bent and extended from the end of the first fixed edge 25 away from the extension wall 24 to the direction away from the extension wall 24 , the auxiliary extension wall 26 and the first fixed edge 25 is enclosed to form a step 27 .
  • the extending wall 24 and the second fixing portion 114 are spaced apart, and the extending wall 24 and the basin frame 12 together define a receiving space 28 , and the receiving space 28 is filled with glue to achieve sealing.
  • the sound outlet 21 is disposed through the front cover plate 22 , the end of the surrounding wall 23 away from the front cover plate 22 is in contact with the periphery of the diaphragm 11 , and the first fixing portion 113 is sandwiched between. between the surrounding wall 23 and the basin frame 12 .
  • the steps 27 can prevent glue from overflowing and ensure that the appearance of the sound-emitting device 100 is not affected.
  • the sealing layer 4 is attached to the side of the metal front cover 2 away from the diaphragm 11 . Specifically, the sealing layer 4 is attached to the side of the front cover 22 away from the surrounding wall 23 . The orthographic projection of the sealing layer 4 on the metal front cover 2 along the vibration direction of the diaphragm 11 is completely within the range of the metal front cover 2 .
  • the sound-emitting device 100 is assembled into the mobile terminal 200 through the sealing layer 4.
  • the sealing layer 4 can increase the waterproof and sealing properties of the sound-emitting device 100, and at the same time play a buffer role to protect the sound-emitting device 100 from damage during transportation and use. It should be noted that the mobile terminal 200 in the figure only represents the part assembled with the sound-emitting device 100 .
  • the present invention also provides an embodiment, which is substantially the same as the above structure, except that the sounding device further includes a ventilating spacer 3a fixed on the metal front cover 2a, and the metal front cover 2a has no step structure.
  • the metal front cover 2a and the air-permeable spacer 3a together form an accommodation cavity 30a, and the sound-emitting unit is accommodated in the accommodation cavity 30a.
  • the metal front cover 2a includes a front cover plate 22a spaced from the diaphragm 11a, a surrounding wall 23a bent and extended from the periphery of the front cover plate 22a in the direction of the diaphragm 11a, The extension wall 24a extending from the peripheral side of the surrounding wall 23a along the second fixing portion, and the first fixing edge bent and extended from the end of the extension wall 24a away from the surrounding wall 23a to the direction away from the sounding unit 25a.
  • the breathable spacer 3a includes a bottom plate 31a spaced from the front cover 22a, a side wall 32a bent and extended from the peripheral edge of the bottom plate 31a toward the extending wall 24a, and the side wall 32a.
  • the end away from the bottom plate 31a is a second fixed edge 33a that is bent and extended in the direction away from the sounding unit.
  • the first fixed edge 25a and the second fixed edge 33a are glued and fixed, that is, the metal front cover 2a
  • the first fixing edge 25a and the second fixing edge 33a are glued and fixed with the air-permeable spacer 3a. That is, the difference between this embodiment and the previous embodiment is that the ventilation spacer 3a is added to improve the dustproof ability without occupying additional space.
  • the ventilation spacer 3a is made of metal material, and its size is thinner .
  • the sound-generating device of the present invention includes a metal front cover that is covered on the side of the diaphragm away from the sound-generating unit, and a metal front cover that is attached to the side of the metal front cover away from the diaphragm.
  • the metal front cover is spaced from the diaphragm to form a sound-emitting front cavity, the metal front cover is provided with a sound-outlet hole passing through it and opposite to the diaphragm, and the sound-outlet hole separates the
  • the sounding front cavity is communicated with the outside world, and the orthographic projection of the sealing layer on the metal front cover along the vibration direction of the diaphragm is completely within the range of the metal front cover; that is, the front cover is made of metal material;
  • the sealing layer ensures sealing and waterproofing, and its orthographic projection on the metal front cover along the vibration direction of the diaphragm is completely within the range of the metal front cover; that is, this structure is adopted to ensure that the sound-emitting device is sealed and waterproof. Under the premise of reducing its external size, the volume of the entire sound-emitting device is reduced.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

本发明提供了一种发声器件，其包括发声单体，所述发声单体包括用于振动发声的振膜，所述发声器件还包括盖设于所述振膜远离所述发声单体一侧的金属前盖以及贴合于所述金属前盖远离所述振膜一侧的密封层，所述金属前盖与所述振膜间隔形成发声前腔，所述金属前盖设有贯穿其上并与所述振膜相对的出声孔，所述出声孔将所述发声前腔与外界连通，所述密封层沿所述振膜的振动方向在所述金属前盖的正投影完全位于所述金属前盖的范围内。与相关技术相比，本发明的发声器件体积更小。

Description

发声器件 技术领域
本发明涉及电声转换领域，尤其涉及一种运用于电子音箱产品的发声器件。
 背景技术
发声器件又名扬声器或喇叭，运用于音箱中实现将音频信号转化为声音播放。
相关技术的发声器件包括发声单体，所述发声单体包括用于振动发声的振膜，所述发声器件还包括盖设于所述振膜与所述振膜共同围成发声前腔的前盖，所述前盖设有贯穿其上的出声孔，所述出声孔将所述发声前腔与外界连通。
 技术问题
然而，相关技术的发声器件中，虽然其防水效果较好，但前盖由塑料制成，其厚度较大，导致整个发声器件的外形尺寸较大。
因此，实有必要提供一种新的发声器件解决上述技术问题。
 技术解决方案
本发明的目的在于提供一种体积更小的发声器件。
为了达到上述目的，本发明提供了一种发声器件，其包括发声单体，所述发声单体包括用于振动发声的振膜，所述发声器件还包括盖设于所述振膜远离所述发声单体一侧的金属前盖以及贴合于所述金属前盖远离所述振膜一侧的密封层，所述金属前盖与所述振膜间隔形成发声前腔，所述金属前盖设有贯穿其上并与所述振膜相对的出声孔，所述出声孔将所述发声前腔与外界连通，所述密封层沿所述振膜的振动方向在所述金属前盖的正投影完全位于所述金属前盖的范围内。
优选的，所述金属前盖包括与所述振膜间隔设置的前盖板以及由所述前盖板的周缘向所述振膜方向弯折延伸的围壁，所述出声孔贯穿所述前盖板设置，所述密封层贴合于所述前盖板远离所述围壁的一侧，所述围壁远离所述前盖板的一端抵接于所述振膜。
优选的，发声单体还包括用于支撑固定所述振膜的盆架，所述振膜包括振动部、由所述振动部的周缘向外弯折延伸的折环部、由所述折环部远离所述振动部的一侧延伸的第一固定部、以及由所述第一固定部远离所述折环部的一侧沿所述盆架的外周侧延伸的第二固定部，所述第一固定部夹设于所述围壁和所述盆架之间，所述第二固定部贴设于所述盆架的外周侧。
优选的，所述金属前盖还包括由所述围壁的周侧沿所述第二固定部延伸的延伸壁，所述延伸壁与所述第二固定部间隔设置，且所述延伸壁与所述盆架共同围成收容空间，所述收容空间内填胶实现密封。
优选的，所述金属前盖还包括由所述延伸壁远离所述围壁的一端向远离所述发声单体方向弯折延伸的第一固定边以及由所述第一固定边远离所述延伸壁的一端向远离所述延伸壁方向弯折延伸的副延伸壁，所述副延伸壁与所述第一固定边围合形成台阶。
优选的，所述发声器件还包括盖设固定于所述金属前盖并共同围成收容腔的透气隔离件，所述发声单体收容于所述收容腔。
优选的，所述透气隔离件包括与所述前盖板间隔设置的底板、由所述底板的周缘向所述延伸壁方向弯折延伸的侧壁以及由所述侧壁远离所述底板的一端向远离所述发声单体方向弯折延伸的第二固定边，所述金属前盖还包括由所述延伸壁远离所述围壁的一端向远离所述发声单体方向弯折延伸的第一固定边，所述第一固定边与所述第二固定边胶合固定。
 有益效果
与相关技术相比，本发明的发声器件中，其包括盖设于所述振膜远离所述发声单体一侧的金属前盖以及贴合于所述金属前盖远离所述振膜一侧的密封层，所述金属前盖与所述振膜间隔形成发声前腔，所述金属前盖设有贯穿其上并与所述振膜相对的出声孔，所述出声孔将所述发声前腔与外界连通，所述密封层沿所述振膜的振动方向在所述金属前盖的正投影完全位于所述金属前盖的范围内；即前盖由金属材料制成；同时所述密封层保证密封及防水，其沿所述振膜的振动方向在所述金属前盖的正投影完全位于所述金属前盖的范围内；即采用此种结构，在保证发声器件密封及防水的前提下，减小其外形尺寸，整个发声器件的体积减小。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本发明发声器件与移动终端的立体结构示意图；
图2为本发明发声器件与移动终端的部分立体结构分解图；
图3为图2中B的放大示意图；
图4为沿图1的剖示图；
图5为图4中C的放大示意图；
图6为本发明另一发声器件与移动终端的立体结构示意图；
图7为图6的剖示图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请同时参阅图1-5，本发明提供了一种发声器件100，其包括发声单体1、金属前盖2以及密封层4，发声单体1包括用于振动发声的振膜11以及用于支撑固定所述振膜11的盆架12。
所述振膜11包括振动部111、由所述振动部111的周缘向外弯折延伸的折环部112、由所述折环部112远离所述振动部111的一侧延伸的第一固定部113、以及由所述第一固定部113远离所述折环部113的一侧沿所述盆架1的外周侧延伸的第二固定部114，所述第二固定部114贴设于所述盆架1的外周侧，即所述振膜11与所述盆架12采用包边设计。其密封效果更好。
金属前盖2盖设于所述振膜11远离所述发声单体1一侧，其与所述振膜11间隔形成发声前腔10，所述金属前盖2设有贯穿其上并与所述振膜11相对的出声孔21，所述出声孔21将所述发声前腔10与外界连通。即前盖由金属材料制成，在保证发声器件100密封及防水的前提下，减小其外形尺寸，整个发声器件100的体积减小，如图3所示，金属前盖2单边超过所述发声单体1大小为a，其a值为0.2mm，而相关技术中其a值为0.7mm，即本发明在密封的条件下，其外形比相关技术中小0.5mm。
具体的，所述金属前盖2包括与所述振膜11间隔设置的前盖板22、由所述前盖板22的周缘向所述振膜11方向弯折延伸的围壁23、由所述围壁23的周侧沿所述第二固定部114延伸的延伸壁24、由所述延伸壁24远离所述围壁23的一端向远离所述发声单体1方向弯折延伸的第一固定边25以及由所述第一固定边25远离所述延伸壁24的一端向远离所述延伸壁24方向弯折延伸的副延伸壁26，所述副延伸壁26与所述第一固定边25围合形成台阶27。所述延伸壁24与所述第二固定部114间隔设置，且所述延伸壁24与所述盆架12共同围成收容空间28，所述收容空间28内填胶实现密封。所述出声孔21贯穿所述前盖板22设置，所述围壁23远离所述前盖板22的一端抵接于所述振膜11的周缘，所述第一固定部113夹设于所述围壁23和所述盆架12之间。在进行打胶时，台阶27可以防止溢胶，保证发声器件100的外观不受影响，即在保证发声器件100的密封性和外观下，所述台阶27更有利于打胶。
密封层4贴合于所述金属前盖2远离所述振膜11一侧，具体的，所述密封层4贴合于所述前盖板22远离所述围壁23的一侧，所述密封层4沿所述振膜11的振动方向在所述金属前盖2的正投影完全位于所述金属前盖2的范围内。发声器件100通过密封层4装配至移动终端200中，密封层4可增加发声器件100的防水和密封性，同时起缓冲作用，保护发声器件100在运输过程和使用过程中损坏。需要说明的是，图中移动终端200仅表示与所述发声器件100装配的部分。
本发明还提供一种实施例，其与上述结构大致相同，不同之处在于，发声器件还包括盖设固定于所述金属前盖2a的透气隔离件3a，同时金属前盖2a无台阶结构。
具体的，参图6和图7所示，金属前盖2a与透气隔离件3 a共同围成收容腔30 a，所述发声单体收容于所述收容腔30a。
具体的，所述金属前盖2a包括与所述振膜11a间隔设置的前盖板22a、由所述前盖板22a的周缘向所述振膜11a方向弯折延伸的围壁23a、由所述围壁23a的周侧沿所述第二固定部延伸的延伸壁24a、由所述延伸壁24a远离所述围壁23a的一端向远离所述发声单体方向弯折延伸的第一固定边25a。
所述透气隔离件3a包括与所述前盖板22a间隔设置的底板31a、由所述底板31a的周缘向所述延伸壁24a方向弯折延伸的侧壁32 a以及由所述侧壁32 a远离所述底板31a的一端向远离所述发声单体方向弯折延伸的第二固定边33a，所述第一固定边25a与所述第二固定边33a胶合固定，即所述金属前盖2a与透气隔离件3a通过第一固定边25a与第二固定边33a形成胶合固定。即本实施例与上一实施例的区别在于增加透气隔离件3a，在不占用额外空间的情况下提升防尘能力，优选的，所述透气隔离件3a由金属材料制成，其尺寸更薄。
与相关技术相比，本发明的发声器件中，其包括盖设于所述振膜远离所述发声单体一侧的金属前盖以及贴合于所述金属前盖远离所述振膜一侧的密封层，所述金属前盖与所述振膜间隔形成发声前腔，所述金属前盖设有贯穿其上并与所述振膜相对的出声孔，所述出声孔将所述发声前腔与外界连通，所述密封层沿所述振膜的振动方向在所述金属前盖的正投影完全位于所述金属前盖的范围内；即前盖由金属材料制成；同时所述密封层保证密封及防水，其沿所述振膜的振动方向在所述金属前盖的正投影完全位于所述金属前盖的范围内；即采用此种结构，在保证发声器件密封及防水的前提下，减小其外形尺寸，整个发声器件的体积减小。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (7)

  1. 一种发声器件，其包括发声单体，所述发声单体包括用于振动发声的振膜，其特征在于，所述发声器件还包括盖设于所述振膜远离所述发声单体一侧的金属前盖以及贴合于所述金属前盖远离所述振膜一侧的密封层，所述金属前盖与所述振膜间隔形成发声前腔，所述金属前盖设有贯穿其上并与所述振膜相对的出声孔，所述出声孔将所述发声前腔与外界连通，所述密封层沿所述振膜的振动方向在所述金属前盖的正投影完全位于所述金属前盖的范围内。
  2. 根据权利要求1所述的发声器件，其特征在于，所述金属前盖包括与所述振膜间隔设置的前盖板以及由所述前盖板的周缘向所述振膜方向弯折延伸的围壁，所述出声孔贯穿所述前盖板设置，所述密封层贴合于所述前盖板远离所述围壁的一侧，所述围壁远离所述前盖板的一端抵接于所述振膜。
  3. 根据权利要求2所述的发声器件，其特征在于，发声单体还包括用于支撑固定所述振膜的盆架，所述振膜包括振动部、由所述振动部的周缘向外弯折延伸的折环部、由所述折环部远离所述振动部的一侧延伸的第一固定部、以及由所述第一固定部远离所述折环部的一侧沿所述盆架的外周侧延伸的第二固定部，所述第一固定部夹设于所述围壁和所述盆架之间，所述第二固定部贴设于所述盆架的外周侧。
  4. 根据权利要求3所述的发声器件，其特征在于，所述金属前盖还包括由所述围壁的周侧沿所述第二固定部延伸的延伸壁，所述延伸壁与所述第二固定部间隔设置，且所述延伸壁与所述盆架共同围成收容空间，所述收容空间内填胶实现密封。
  5. 根据权利要求4所述的发声器件，其特征在于，所述金属前盖还包括由所述延伸壁远离所述围壁的一端向远离所述发声单体方向弯折延伸的第一固定边以及由所述第一固定边远离所述延伸壁的一端向远离所述延伸壁方向弯折延伸的副延伸壁，所述副延伸壁与所述第一固定边围合形成台阶。
  6. 根据权利要求4所述的发声器件，其特征在于，所述发声器件还包括盖设固定于所述金属前盖并共同围成收容腔的透气隔离件，所述发声单体收容于所述收容腔。
  7. 根据权利要求6所述的发声器件，其特征在于，所述透气隔离件包括与所述前盖板间隔设置的底板、由所述底板的周缘向所述延伸壁方向弯折延伸的侧壁以及由所述侧壁远离所述底板的一端向远离所述发声单体方向弯折延伸的第二固定边，所述金属前盖还包括由所述延伸壁远离所述围壁的一端向远离所述发声单体方向弯折延伸的第一固定边，所述第一固定边与所述第二固定边胶合固定。
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