WO2020020067A1 - 发声结构及终端 - Google Patents

发声结构及终端 Download PDF

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Publication number
WO2020020067A1
WO2020020067A1 PCT/CN2019/096734 CN2019096734W WO2020020067A1 WO 2020020067 A1 WO2020020067 A1 WO 2020020067A1 CN 2019096734 W CN2019096734 W CN 2019096734W WO 2020020067 A1 WO2020020067 A1 WO 2020020067A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
opening
sound
magnet
cover
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PCT/CN2019/096734
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English (en)
French (fr)
Inventor
阮清波
Original Assignee
维沃移动通信有限公司
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.)
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Publication date
Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Priority to KR1020217005680A priority Critical patent/KR102502460B1/ko
Priority to EP19840112.7A priority patent/EP3829193A4/en
Publication of WO2020020067A1 publication Critical patent/WO2020020067A1/zh
Priority to US17/158,780 priority patent/US11490207B2/en

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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
    • 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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
    • H04R1/347—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers for obtaining a phase-shift between the front and back acoustic wave
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops

Definitions

  • Embodiments of the present disclosure relate to the field of communications technologies, and in particular, to a sounding structure and a terminal.
  • the first method is to set a home screen, and then set the receiver for the user on the side where the home screen is located.
  • the second method is to set both screens as the home screen, and then set the receivers separately for the user. use.
  • the user needs to be on the side of the home screen to implement the function of the receiver.
  • the second method Setting two receivers can avoid the problem of flipping the screen during use, but setting two receivers requires the layout space of the two receivers, which will affect the installation space of other features.
  • the setup of the dual receiver has a problem of occupying a large space.
  • the embodiments of the present disclosure provide a sound generating structure and a terminal, so as to solve the problem that a large space is occupied by the setting of the dual receiver in the related art.
  • An embodiment of the present disclosure provides a sound generating structure, including:
  • a frame including a receiving cavity, the receiving cavity including a first opening and a second opening provided on two opposite sides of the frame;
  • a magnetic circuit system provided in the accommodation cavity includes a first channel and a second channel;
  • a first diaphragm, the first diaphragm is disposed facing the first opening, and a voice coil is provided on the first diaphragm, and the voice coil portion extends into the first channel;
  • a second diaphragm is provided facing the second opening, and the second channel communicates the first opening and the second opening.
  • An embodiment of the present disclosure further provides a terminal, including the foregoing sound emitting structure.
  • the sound emitting structure includes: a frame body, the frame body including a receiving cavity, the receiving cavity including a first opening and a second opening provided on two opposite sides of the frame body; a magnetic circuit system The magnetic circuit system is disposed in the accommodation cavity, and the magnetic circuit system includes a first channel and a second channel; a first diaphragm, the first diaphragm is disposed facing the first opening, and A voice coil is provided on the first diaphragm, and the voice coil portion extends into the first channel; and a second diaphragm, the second diaphragm is disposed facing the second opening, and the A second channel communicates the first opening and the second opening.
  • FIG. 1 is one of the structural schematic diagrams of a sounding structure provided by an embodiment of the present disclosure
  • FIG. 2 is a second structural schematic diagram of a sound emitting structure provided by an embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a sound generation structure, including:
  • a frame body 10 including a receiving cavity, the receiving cavity including a first opening 11 and a second opening 12 provided on two opposite sides of the frame body 10;
  • a magnetic circuit system provided in the accommodation cavity, and the magnetic circuit system includes a first channel 21 and a second channel 22;
  • a first diaphragm 30 is provided facing the first opening 11, and a voice coil 40 is provided on the first diaphragm 30, and the voice coil 40 partially extends to the first channel.
  • a second diaphragm 50 is provided facing the second opening 12, and the second channel 22 communicates with the first opening 11 and the second opening 12.
  • a first diaphragm 30 is provided through the first openings 11 on two opposite sides of the frame body 10, and a second diaphragm 50 is provided through the second opening 12.
  • the first diaphragm 30 and the voice coil 40 can be bonded together so that the first diaphragm 30 can vibrate along with the voice coil 40. Since the closed-loop magnetic field is formed in the first channel 21, when the part is located in the first When an electric signal passes through the voice coil 40 in the channel 21, the voice coil 40 located in the first channel 21 will vibrate under the action of the magnetic field circuit, and then drive the first diaphragm 30 to vibrate and sound. The vibration will cause the airflow in the accommodation chamber to fluctuate. The fluctuating airflow can be transmitted to the second diaphragm 50 through the second channel 22, so that the second diaphragm 50 follows the first diaphragm 30 to vibrate. Sound can be heard on both opposite sides.
  • the sound generating structure can be a receiver or a speaker, and the size and model can be designed according to actual needs, which is not limited here.
  • the waterproof performance of the sound emitting structure can also be improved.
  • the first channel 21 has a magnetic field loop, so that when the voice coil 40 passes an electric signal, the voice coil 40 will vibrate under the action of the magnetic field loop;
  • the second channel 22 is an airflow channel for the first diaphragm 30
  • the airflow fluctuation generated by the vibration is transmitted to the second diaphragm 50 so that the second diaphragm 50 follows the first diaphragm 30 to vibrate, so as to achieve the effect of a single voice coil to achieve double-sided sound.
  • the frame 10 is a supporting structure of the entire sound emitting structure, which can be injection-molded with plastic material, and a heat radiation vent can be provided on the side wall of the frame 10 to dissipate the magnetic circuit system and the voice coil 40 to prevent the sound structure from working. During the process, the temperature of the voice coil 40 and the magnetic circuit system is too high.
  • the magnetic circuit system includes a first magnet 23 and a second magnet 24, the second magnet 24 is disposed around the outer periphery of the first magnet 23, and the first magnet 23 and the second magnet There is a gap between 24 to form the first channel 21;
  • the first magnet 23 is provided with a first through hole 231 communicating with the first opening 11 and the second opening 12 to form the second channel 22.
  • the first magnet 23 is connected to the inner wall on the side of the second opening 12 of the accommodating cavity, so that the first magnet 23 is fixedly disposed in the accommodating cavity; the second magnet 24 is attached to the accommodating cavity.
  • the inner side wall between the first opening 11 and the second opening 12 allows the second magnet 24 to be fixedly disposed in the accommodating cavity.
  • the second magnet 24 may be integrally formed, or may be formed by combining a plurality of sub-magnets.
  • a receiving groove for accommodating the first magnet 23 is required.
  • the second magnet 24 formed in combination needs to surround the first magnet 23 so that the gap between the first magnet 23 and the second magnet 24 forms the first channel 21.
  • the second magnet 24 in this embodiment may also be replaced with an object having magnetic permeability, as long as the performance of the voice coil 40 can be achieved.
  • the magnetic poles of the first magnet 23 and the second magnet 24 are opposite to each other.
  • the gap between the first magnet 23 and the second magnet 24 can form a magnetic field loop and form the first channel 21, and part of the first channel 21
  • the voice coil 40 in 21 can vibrate under the action of an electric signal and a magnetic field circuit, thereby driving the first diaphragm 30 to make a sound.
  • the first through hole 231 may be provided in the middle of the first magnet 23, or may be located at the left or right position of the middle of the first magnet 23, as long as the second diaphragm 50 can follow the first diaphragm 30 Just shake.
  • the first through hole 231 is provided in the middle of the first magnet 23.
  • a linkage 80 may also be provided between the first diaphragm 30 and the second diaphragm 50, so that the vibration frequency of the second diaphragm 50 and the The vibration frequency is consistent.
  • the linkage rod 80 can be made of a material with light weight, high hardness, and good adhesion with the first diaphragm 30 and the second diaphragm 50, such as a carbon fiber material or a polymer plastic material.
  • a multi-following linkage bar 80 may be provided between the first diaphragm 30 and the second diaphragm 50, which may be two.
  • the magnetic circuit system may further include a first magnetically permeable sheet 25 and a second magnetically permeable sheet 26.
  • the first magnetically permeable sheet 25 is provided corresponding to the first magnet 23, and the first magnetically permeable sheet 25 is provided with the first through hole 231.
  • the second magnetically conductive sheet 26 is provided corresponding to the second magnet 24; wherein the first magnetically conductive sheet 25 is provided on the side of the first magnet 23 facing the first diaphragm 30, and the second magnetically conductive sheet 26
  • the magnetic sheet 26 is provided on a side of the second magnet 24 facing the first diaphragm 30.
  • the sound generating structure further includes a first cover 60 and a second cover 70;
  • the first cover 60 is covered at the first opening 11, and the first diaphragm 30 is located between the first cover 60 and the receiving cavity.
  • the first cover 60 A first sound hole 61 corresponding to the first diaphragm 30 is provided;
  • the second cover 70 is disposed at the second opening 12, and the second diaphragm 50 is located between the second cover 70 and the accommodation cavity.
  • the second cover 70 A second sound emitting hole 71 corresponding to the second diaphragm 50 is provided.
  • the first cover 60 and the second cover 70 by providing the first cover 60 and the second cover 70, the first diaphragm 30 and the second diaphragm 50 can be protected, and the damage of the first diaphragm 30 and the second diaphragm 50 by foreign objects is reduced. Moreover, in the application of the whole machine, the first cover body 60 and the second cover body 70 can also be assembled and contacted with the whole machine.
  • a first protective net can also be provided in the first sound hole 61, and the first protective net can also play a role in preventing dust from covering the first diaphragm.
  • a diaphragm 30 further affects the sound generating effect of the first diaphragm 30;
  • a second protective net can also be provided in the second sound outlet hole 71, and the second protective net can also play a role in preventing dust from covering the second vibration
  • the film 50 further affects the sound emission effect of the second diaphragm 50.
  • each component of the sounding structure can be designed according to actual needs.
  • the first cover 60 and the second cover 70 can be arranged in a square shape.
  • the first cover body 60 and the second cover body 70 may be arranged in a circle.
  • the structural shapes of other components can also be set according to the actual situation, as long as the sound-producing structure can achieve double-sided sound.
  • An embodiment of the present disclosure also relates to a terminal, including the foregoing sound emitting structure.
  • the terminal is a dual-screen terminal, such as a double-screen terminal or a folding screen terminal.
  • the terminal can also be a mobile phone, tablet computer, Personal Digital Assistant (PDA), e-book reader, Moving Picture Experts Standard Audio Level 3 (MP3) player, Motion picture expert compression standard audio layer 4 (Moving Picture Experts Group Audio Audio Layer IV, MP4) player, laptop portable computer, car computer, desktop computer, set-top box, smart TV, wearable device and so on.
  • PDA Personal Digital Assistant
  • MP3 Moving Picture Experts Standard Audio Level 3
  • MP4 Motion picture expert compression standard audio layer 4
  • laptop portable computer car computer
  • desktop computer desktop computer
  • set-top box smart TV
  • smart TV wearable device and so on.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Telephone Set Structure (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

本公开提供一种发声结构及终端，发声结构包括：框体，所述框体包括一容置腔，所述容置腔包括设于所述框体两相对侧的第一开口和第二开口；磁路系统，所述磁路系统设于所述容置腔内，且所述磁路系统包括第一通道和第二通道；第一振膜，所述第一振膜面向所述第一开口设置，且所述第一振膜上设有音圈，所述音圈部分延伸至所述第一通道内；以及，第二振膜，所述第二振膜面向所述第二开口设置，且所述第二通道连通所述第一开口和所述第二开口。

Description

发声结构及终端
相关申请的交叉引用
本申请主张在2018年7月26日在中国提交的中国专利申请No.201810834802.0的优先权，其全部内容通过引用包含于此。
技术领域
本公开实施例涉及通信技术领域，尤其涉及一种发声结构及终端。
背景技术
在相关技术中，对于双屏终端的受话器设置，主要包括两种方式。第一种方式，通过设置一个主屏幕，然后对应主屏幕所在一侧设置受话器，以供用户使用；第二种方式，通过将两个屏幕都设置成主屏幕，然后分别设置受话器，以供用户使用。然而，第一种方式中，用户需要在主屏幕一侧才能实现受话器的功能，导致用户每次使用受话器的过程中，都需要先转到主屏幕一侧；而在第二种方式中，通过设置两个受话器，虽然能够避免使用过程中翻转屏幕的问题，但是设置两个受话器需要占用两个受话器的布局空间，这样会影响其他功能部件的安装空间。
可见，相关技术中，双受话器的设置存在占用空间较大的问题。
发明内容
本公开实施例提供一种发声结构及终端，以解决相关技术中，双受话器的设置存在占用空间较大的问题。
本公开实施例提供了一种发声结构，包括：
框体，所述框体包括一容置腔，所述容置腔包括设于所述框体两相对侧的第一开口和第二开口；
磁路系统，所述磁路系统设于所述容置腔内，且所述磁路系统包括第一通道和第二通道；
第一振膜，所述第一振膜面向所述第一开口设置，且所述第一振膜上设 有音圈，所述音圈部分延伸至所述第一通道内；
以及，第二振膜，所述第二振膜面向所述第二开口设置，且所述第二通道连通所述第一开口和所述第二开口。
本公开实施例还提供一种终端，包括上述发声结构。
本公开实施例中，发声结构包括：框体，所述框体包括一容置腔，所述容置腔包括设于所述框体两相对侧的第一开口和第二开口；磁路系统，所述磁路系统设于所述容置腔内，且所述磁路系统包括第一通道和第二通道；第一振膜，所述第一振膜面向所述第一开口设置，且所述第一振膜上设有音圈，所述音圈部分延伸至所述第一通道内；以及，第二振膜，所述第二振膜面向所述第二开口设置，且所述第二通道连通所述第一开口和所述第二开口。这样通过设置可以双面发声的发声结构，可以有效降低终端中的发声结构的占用空间。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开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公开的一些实施例，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他的附图。
图1是本公开实施例提供的发声结构的结构示意图之一；
图2是本公开实施例提供的发声结构的结构示意图之二。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
如图1和图2所示，本公开实施例提供一种发声结构，包括：
框体10，所述框体10包括一容置腔，所述容置腔包括设于所述框体10两相对侧的第一开口11和第二开口12；
磁路系统，所述磁路系统设于所述容置腔内，且所述磁路系统包括第一通道21和第二通道22；
第一振膜30，所述第一振膜30面向所述第一开口11设置，且所述第一振膜30上设有音圈40，所述音圈40部分延伸至所述第一通道21内；
以及，第二振膜50，所述第二振膜50面向所述第二开口12设置，且所述第二通道22连通所述第一开口11和所述第二开口12。
本实施方式中，通过在框体10两相对侧的第一开口11设置第一振膜30，以及在第二开口12设置第二振膜50。其中，第一振膜30与音圈40可以粘接在一起，以使第一振膜30可以跟随音圈40一起振动；由于第一通道21内形成有闭环的磁场，因此当部分位于第一通道21内的音圈40有电信号通过时，部位位于第一通道21内的音圈40会在磁场回路的作用下产生振动，进而带动第一振膜30振动发声，第一振膜30的振动会带动容置腔内的气流产生波动，波动的气流通过第二通道22可以传导至第二振膜50，进而使第二振膜50跟随第一振膜30进行振动，从而使发声结构的两相对侧都可以发声。
其中，发声结构可以受话器，也可以是扬声器，而且其尺寸和型号可以根据实际需求进行设计，在此不作限定。
而且，通过在第二开口12一侧，设置第二振膜50，还可以提高发声结构的防水性能。
这样对于需要双面发声的终端来说，通过设置一个可以双面发声的发声结构，就可以实现终端的双面发声，相对于相关技术中需要在终端的正反两面分别设置受话器或者扬声器，可以有效解决设置双受话器或者扬声器占用空间大的问题。
其中，第一通道21存在磁场回路，这样当音圈40有电信号通过时，在磁场回路的作用下，音圈40会产生振动；第二通道22为气流通道，以供第一振膜30振动产生的气流波动，传导至第二振膜50，以使第二振膜50跟随第一振膜30振动，达到单音圈实现双面发声的效果。
其中，框体10为整个发声结构的支撑结构，可以采用塑胶材料注塑成型，并可以在框体10的侧壁开设散热透气孔，以对磁路系统和音圈40进行散热，避免发声结构在工作过程中，音圈40和磁路系统温度过高的问题。
可选地，所述磁路系统包括第一磁铁23和第二磁铁24，所述第二磁铁24环绕所述第一磁铁23的外周设置，且所述第一磁铁23与所述第二磁铁24之间存在间隙，以形成所述第一通道21；
所述第一磁铁23设有连通所述第一开口11和所述第二开口12的第一通孔231，以形成所述第二通道22。
本实施方式中，第一磁铁23与容置腔的第二开口12所在一侧的内壁连接，以使第一磁铁23固定设于容置腔内；第二磁铁24贴设于容置腔的第一开口11和第二开口12之间的内侧壁，以使第二磁铁24固定设于容置腔内。
其中，第二磁铁24可以是一体成型的，也可以是多个子磁铁组合形成的，对于一体成型的第二磁铁24，需要设置一个用于收容第一磁铁23的收容槽；而对于多个子磁铁组合形成的第二磁铁24，需要对第一磁铁23形成围设，以便使第一磁铁23和第二磁铁24之间的间隙，形成第一通道21。
需要说明的是，本实施方式中的第二磁铁24还可以用具备导磁性能的物体替代，只要能够实现音圈40的性能即可。
其中，第一磁铁23与第二磁铁24的磁极朝向相反，这样位于第一磁铁23与第二磁铁24之间的间隙，可以形成磁场回路，并形成第一通道21，而部分位于第一通道21内的音圈40可以在电信号以及磁场回路的作用下，进行振动，进而带动第一振膜30发声。
其中，第一通孔231可以设于第一磁铁23的中部，也可以设于第一磁铁23的中部偏左或者偏右的位置，只要能够使第二振膜50能够跟随第一振膜30振动即可。可选地，为提升第二振膜50跟随第一振膜30振动的准确性，提升第二振膜50的发声效果，第一通孔231设于第一磁铁23的中部。
为进一步提升第二振膜50的发声效果，还可以在第一振膜30和第二振膜50之间设置联动杆80，以使第二振膜50的振动频率与第一振膜30的振动频率一致。其中，联动杆80可以质量轻、硬度大、而且与第一振膜30和第二振膜50的粘接性能较好的材料制成，比如碳纤维材料或者高分子塑胶材料等。通过联动杆80的设置，这样第一振膜30和第二振膜50就可以相当于一个整体，从而使发声结构的正反两面的出声效果相当。其中，为提升第一振膜30和第二振膜50的联动效果，可以在第一振膜30和第二振膜50之间 设置多跟联动杆80，可选为两根。
而且，磁路系统还可以包括第一导磁片25和第二导磁片26，第一导磁片25对应第一磁铁23设置，且第一导磁片25设有与第一通孔231对应的第二通孔251，所述第二导磁片26对应第二磁铁24设置；其中，第一导磁片25设于第一磁铁23朝向第一振膜30的一侧，第二导磁片26设于第二磁铁24朝向第一振膜30的一侧。通过设置第一导磁片25和第二导磁片26，可以提升第一通道21内的磁通聚集程度，进而提升第一音圈40的振动效果。
可选地，所述发声结构还包括第一盖体60和第二盖体70；
所述第一盖体60盖设于所述第一开口11处，且所述第一振膜30位于所述第一盖体60与所述容置腔之间，所述第一盖体60设有与所述第一振膜30对应的第一出声孔61；
所述第二盖体70盖设于所述第二开口12处，且所述第二振膜50位于所述第二盖体70与所述容置腔之间，所述第二盖体70设有与所述第二振膜50对应的第二出声孔71。
本实施方式中，通过设置第一盖体60和第二盖体70可以保护第一振膜30和第二振膜50，降低外物对第一振膜30和第二振膜50的损伤，而且在整机应用中，还可以通过第一盖体60和第二盖体70与整机进行装配接触。
而且，为进一步保护第一振膜30和第二振膜50，还可以在第一出声孔61内设置第一防护网，第一防护网还可以起到防尘的作用，避免尘土覆盖第一振膜30进而影响第一振膜30的发声效果；还可以在第二出声孔71内设置第二防护网，第二防护网也可以起到防尘的作用，避免尘土覆盖第二振膜50进而影响第二振膜50的发声效果。
需要说明的是，发声结构的各个部件的结构形状可以根据实际需求进行设计，比如，当框体10为立方体结构时，第一盖体60、第二盖体70可以成方形设置；而当框体10为圆柱体结构时，第一盖体60、第二盖体70则可以成圆形设置。其他部件的结构形状也可以根据实际情况进行设定，只要使发声结构能够实现双面发声即可。
本公开实施例还涉及一种终端，包括上述发声结构。
可选地，终端为双屏终端，比如，双面屏终端，或者折叠屏终端等。
其中，该终端还可以是手机、平板电脑、个人数字助理(Personal Digital Assistant，PDA)、电子书阅读器、动态影像专家压缩标准音频层面3(Moving Picture Experts Group Audio Layer III，MP3)播放器、动态影像专家压缩标准音频层面4(Moving Picture Experts Group Audio Layer IV，MP4)播放器、膝上型便携计算机、车载电脑、台式计算机、机顶盒、智能电视机、可穿戴设备等等。
需要说明的是，上述发声结构实施例的实现方式同样适应于该终端的实施例中，并能达到相同的技术效果，在此不再赘述。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以权利要求的保护范围为准。

Claims (10)

  1. 一种发声结构，包括：
    框体，所述框体包括一容置腔，所述容置腔包括设于所述框体两相对侧的第一开口和第二开口；
    磁路系统，所述磁路系统设于所述容置腔内，且所述磁路系统包括第一通道和第二通道；
    第一振膜，所述第一振膜面向所述第一开口设置，且所述第一振膜上设有音圈，所述音圈部分延伸至所述第一通道内；
    以及，第二振膜，所述第二振膜面向所述第二开口设置，且所述第二通道连通所述第一开口和所述第二开口。
  2. 根据权利要求1所述的发声结构，其中，所述磁路系统包括第一磁铁和第二磁铁，所述第二磁铁环绕所述第一磁铁的外周设置，且所述第一磁铁与所述第二磁铁之间存在间隙，以形成所述第一通道；
    所述第一磁铁设有连通所述第一开口和所述第二开口的第一通孔，以形成所述第二通道。
  3. 根据权利要求2所述的发声结构，其中，所述磁路系统还包括第一导磁片和第二导磁片，所述第一导磁片设于所述第一磁铁朝向所述第一振膜的一侧，且所述第一导磁片设有与所述第一通孔对应的第二通孔，所述第二导磁片设于所述第二磁铁朝向所述第一振膜的一侧。
  4. 根据权利要求2所述的发声结构，其中，所述第一通孔为设于所述第一磁铁中部的通孔。
  5. 根据权利要求1所述的发声结构，其中，所述发声结构还包括位于所述第二通道内的联动杆，所述联动杆的两端分别连接所述第一振膜和所述第二振膜。
  6. 根据权利要求5所述的发声结构，其中，所述联动杆采用碳纤维材料或者高分子塑胶材料制成。
  7. 根据权利要求1所述的发声结构，其中，所述发声结构还包括第一盖体和第二盖体；
    所述第一盖体盖设于所述第一开口处，且所述第一振膜位于所述第一盖体与所述容置腔之间，所述第一盖体设有与所述第一振膜对应的第一出声孔；
    所述第二盖体盖设于所述第二开口处，且所述第二振膜位于所述第二盖体与所述容置腔之间，所述第二盖体设有与所述第二振膜对应的第二出声孔。
  8. 根据权利要求7所述的发声结构，其中，所述第一出声孔设有第一防护网，所述第二出声孔设有第二防护网。
  9. 一种终端，包括如权利要求1至8中任一项所述的发声结构。
  10. 根据权利要求9所述的终端，其中，所述终端为双屏终端。
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