WO2021103072A1 - 扬声器及音频设备 - Google Patents

扬声器及音频设备 Download PDF

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Publication number
WO2021103072A1
WO2021103072A1 PCT/CN2019/122983 CN2019122983W WO2021103072A1 WO 2021103072 A1 WO2021103072 A1 WO 2021103072A1 CN 2019122983 W CN2019122983 W CN 2019122983W WO 2021103072 A1 WO2021103072 A1 WO 2021103072A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
hole
loudspeaker
magnetic
cavity
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PCT/CN2019/122983
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English (en)
French (fr)
Inventor
肖波
令狐荣林
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2021103072A1 publication Critical patent/WO2021103072A1/zh

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Classifications

    • 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
    • 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

Definitions

  • This application relates to the field of electro-acoustic conversion technology, and in particular to a speaker and audio equipment.
  • the speaker is a commonly used electronic component, mainly used for the playback of audio signals. Its working principle is that a voice coil is built in a magnetic circuit composed of magnets. The current flowing through the voice coil generates a driving force in the up and down directions to make vibrations. The membrane vibrates thereby causing the air to vibrate to produce sound.
  • audio devices electronic devices with audio functions
  • 4G and 5G era people’s requirements for the performance of audio device speakers are also increasing. high.
  • the existing speakers still have the problems of low low frequency sensitivity and high power consumption, which cannot meet the user's requirements for speaker performance and cost.
  • the purpose of this application is to provide a loudspeaker to solve the current technical problems of low-frequency sensitivity of the loudspeaker and high power consumption.
  • a loudspeaker includes a basin frame with a receiving space, and a vibration system and a magnetic circuit system housed in the receiving space, the vibration system including a vibration system fixed to the basin frame and used for vibrating and sounding.
  • a membrane, the magnetic circuit system includes a magnetic bowl fixed to the basin frame;
  • the diaphragm and the magnetic bowl are enclosed with the basin frame to form an inner cavity
  • the speaker further includes a side of the magnetic bowl that faces away from the diaphragm and is enclosed with the magnetic bowl to form an inner cavity.
  • the back cover of the cavity, the back cavity is connected to the inner cavity;
  • the back cover includes a top wall disposed opposite to the magnetic bowl, and a side wall connected around the top wall and connected to the basin frame, the side wall is provided with a first through hole, and the speaker It also includes a sound film fixed to the back cover and covering the first through hole.
  • the magnetic circuit system further includes a magnet unit fixed to the magnetic bowl, the magnet unit is provided with a second through hole penetrating therethrough in the direction of vibration, and the magnetic bowl is provided with the second through hole.
  • a third through hole communicating with the two through holes, the second through hole and the third through hole penetrate the inner cavity and the rear cavity.
  • the speaker further includes a breathable diaphragm, and the breathable diaphragm covers at least one of the second through hole and the third through hole.
  • the vibration system further includes a voice coil that drives the diaphragm to vibrate and produce sound
  • the magnet unit includes a first magnet part and a second magnet part arranged around the first magnet part. A magnetic gap is left between the magnet part and the second magnet part, and the voice coil is inserted into the magnetic gap and surrounds the first magnet part.
  • the vibrating membrane includes a dome in the middle position and a folding ring fixedly connected to the dome, and the folding ring is connected to the basin frame.
  • the speaker further includes a centering support piece which is electrically connected to the voice coil and an external circuit.
  • the sound film is flat.
  • the sound film includes a flat plate part located at an intermediate position and a bent part surrounding the flat plate part, and the bent part protrudes from the flat plate part in a direction away from the rear cavity.
  • a vent hole is provided on the back cover, and the vent hole communicates the back cavity and the external space.
  • the present application also provides an audio device.
  • the audio device includes a casing and the above-mentioned speaker, and the top wall is in soft contact and fit with the casing.
  • the beneficial effects of the speaker are: since the inner cavity is connected to the rear cavity, the vibration of the diaphragm causes the compression of the air in the inner cavity to affect the air flow in the rear cavity; the change of the air in the rear cavity will cause the vibration of the sound diaphragm. Thereby increasing the volume of the rear cavity, so that Fo, the lowest resonant frequency, is reduced, thereby improving the low-frequency sensitivity of the speaker and effectively reducing power consumption.
  • the sound film is arranged on the side wall of the back cover instead of the top wall, so that the top wall of the back cover can be used for soft contact with the cabinet of the audio device, thereby effectively reducing the risk of cabinet vibration caused by speaker vibration, and further Optimize user experience.
  • the audio device provided by the present application has all the beneficial effects of the speaker due to the use of the above-mentioned speaker, and will not be repeated here.
  • FIG. 1 is a schematic diagram 1 of the structure of the loudspeaker provided by this application.
  • Figure 2 is a second structural diagram of the loudspeaker provided by this application.
  • FIG. 3 is a schematic diagram of the top view structure of the speaker provided by this application.
  • Figure 4 is a schematic diagram of the A-A cross-sectional structure in Figure 3;
  • Figure 5 is the first schematic diagram of the explosive structure of the loudspeaker provided by this application.
  • Fig. 6 is the second schematic diagram of the exploded structure of the loudspeaker provided by this application.
  • the present application discloses a speaker 10, which includes a base frame 100, a vibration system 200, a magnetic circuit system 300, a back cover 400 and a sound film 500.
  • the basin frame 100 has a containing space 110
  • the vibration system 200 and the magnetic circuit system 300 are both contained in the containing space 110
  • the magnetic circuit system 300 drives the vibration system 200 to vibrate and produce sound.
  • the vibration system 200 includes a diaphragm 210 and a voice coil 220.
  • the diaphragm 210 is fixed to the frame 100 and used for vibrating and sounding.
  • the magnetic circuit system 300 includes a magnet unit 320 and a magnetic bowl 310.
  • the magnetic bowl 310 is fixed on the frame.
  • the diaphragm 210, the magnetic bowl 310, and the basin frame 100 are enclosed to form an inner cavity 11.
  • the rear cover 400 is connected to the basin frame 100 and is located on the side of the magnetic bowl 310 facing away from the diaphragm 210.
  • the cover 400 and the magnetic bowl 310 are enclosed to form a back cavity 12, and the inner cavity 11 and the back cavity 12 communicate with each other.
  • the back cover 400 includes a top wall 410 and a side wall 420.
  • the top wall 410 is arranged opposite to the magnetic bowl 310.
  • the side wall 420 is connected to the periphery of the top wall 410 and connected to the basin frame 100.
  • the side wall 420 is provided There is a first through hole 421 which communicates the rear cavity 12 with the external space.
  • the sound film 500 is connected to the back cover 400 and covers the first through hole 421.
  • the sound film 500 is an elastic member.
  • the vibration of the diaphragm 210 causes the compression of the air in the inner cavity 11 to affect the air flow in the rear cavity 12, and the change of the air in the rear cavity 12 will cause the sound diaphragm 500 to vibrate, thereby Enlarging the volume of the rear cavity 12 reduces the Fo (lowest resonant frequency), thereby improving the low-frequency sensitivity of the speaker 10 and effectively reducing power consumption.
  • the sound film 500 is arranged on the side wall 420 of the back cover 400 instead of the top wall 410, so that the top wall 410 of the back cover 400 can be used to contact and cooperate with the cabinet of the audio device, thereby effectively reducing the vibration caused by the speaker 10
  • the risk of shell vibration further optimizes the user experience.
  • the sound film 500 and the rear cover 400 are glued and connected.
  • the sound film 500 is in the shape of a flat plate. In this way, the difficulty of processing and assembly is low, which helps to save costs.
  • the sound film 500 includes a flat plate portion 510 at an intermediate position and a bent portion 520 surrounding the flat plate portion 510.
  • the bent portion 520 is connected to the flat plate portion 510 and forms a ring shape by itself.
  • the bent portion 520 protrudes from the flat plate portion 510 in a direction away from the rear cavity 12, so that the volume of the rear cavity 12 can be further increased, low frequency sensitivity is optimized, and power consumption is reduced.
  • the magnet unit 320 is fixed to the magnetic bowl 100. Specifically, the magnet unit 320 is stacked on the side of the magnetic bowl 310 facing the diaphragm 210, wherein the magnet unit 320 is provided with a penetrating through it in the direction of vibration. On the upper second through hole 3213, the magnetic bowl 310 is provided with a third through hole 311 communicating with the second through hole 3213, that is, the second through hole 3213 and the third through hole 311 penetrate the inner cavity 11 and the rear cavity 12, The inner cavity 11 and the rear cavity 12 communicate with each other through the second through hole 3213 and the third through hole 311.
  • the speaker 10 further includes a breathable diaphragm 700 connected to the magnet unit 320 and blocks the second through hole 3213. In this way, the condition that the inner cavity 11 and the rear cavity 12 are communicated can be satisfied. It also has a certain blocking effect, so that the gas communication speed between the inner cavity 11 and the rear cavity 12 is maintained within a certain range, and the sound quality of the speaker 10 is ensured.
  • the breathable membrane 700 blocks at least one of the second through hole 3213 and the third through hole 311, that is, the breathable membrane 700 can also block the third through hole 311, or seal at the same time. Blocking the second through hole 3213 and the third through hole 311 is not uniquely limited here.
  • the magnet unit 320 includes a first magnet part 321 and a second magnet part 322, wherein the second magnet part 322 is arranged around the first magnet part 321, and is left between the first magnet part 321 and the first magnet part 321.
  • the magnetic gap 324 that is, the gap left between the first magnet portion 321 and the second magnet portion 322 satisfies the condition that there is a magnetic induction between the two.
  • at least one of the first magnet part 321 and the second magnet part 322 is a permanent magnet.
  • One end of the voice coil 220 is inserted into the magnetic gap, and the other end is in contact with the diaphragm 210.
  • the current flowing through the voice coil 220 is placed in the magnetic line of induction between the first magnet part 321 and the second magnet part 322.
  • the current change can generate corresponding electromagnetic induction force, thereby driving the diaphragm 210 to vibrate and produce sound.
  • the first magnet portion 321 includes a main magnet 3211 and a main pole core 3212.
  • the main pole core 3212 is stacked on the side of the main magnet 3211 close to the diaphragm 210, and the breathable diaphragm 700 is clamped.
  • the second magnet portion 322 includes two pairs of magnets 3221 and two side magnets 3222, of which the two pairs of magnets 3221 are located on the left and right sides of the main magnet 3211,
  • the steel 3222 is located on the front and rear sides of the main magnet 3211 respectively.
  • the magnet unit 320 further includes an upper clamping plate 323, which is superimposed on the side of the two pairs of magnets 3221 and two magnets 3222 close to the diaphragm 210, and is connected to the basin frame 100, Thus, the positions of the two pairs of magnets 3221 and the two side magnets 3222 are fixed.
  • the magnetic bowl 310 includes a bottom plate and two side plates connected to opposite ends of the bottom plate.
  • the two side plates extend relative to the plane of the bottom plate toward the direction of the diaphragm 210 to form a groove.
  • the main magnet 3211, the auxiliary magnet 3221, and The side magnets 3222 are all set in the groove.
  • the diaphragm 210 includes a dome 211 in the middle position and a folding ring 212 fixedly connected to the dome 211, that is, the folding ring 212 is connected around the dome 211, and the folding ring 212 is connected to the dome 211.
  • the basin frame 100 is connected to realize indirect positioning of the dome 211, and the dome 211 is in contact and fit with the end of the voice coil 220 protruding from the magnetic gap 324.
  • the folding ring 212 bends and extends from the plane where the dome 211 is located toward the direction where the rear cavity 12 is located.
  • the loudspeaker 10 further includes a centering support piece 900, which is a conductive member, is arranged on opposite sides of the voice coil 220 and is electrically connected to the voice coil 220, and the centering support piece 900 One end of 900 protrudes out of the basin frame 100 for electrical connection with an external power source, that is, the centering support piece 900 is electrically connected to the voice coil 220 and the external circuit.
  • the centering support piece 900 plays a role of stabilizing vibration on the one hand, and on the other hand, it introduces electrical energy into the voice coil 220 to conduct electricity.
  • the top wall 410 of the back cover 400 is provided with a vent hole 411, the vent hole 411 communicates with the rear cavity 12 and the external space, and the vent hole 411 is covered by a breathable film 430. In this way, the pressure can be effectively relieved.
  • the ventilation holes 411 may also be provided on the side wall 420, and the number of the ventilation holes 411 may also be increased according to actual needs, which is not uniquely limited here.
  • the speaker 10 further includes a front cover 800
  • the front cover 800 includes a shutter 820 and a front frame 810, wherein the front frame 810 is connected to the periphery of the shutter 820 and connected to the basin frame 100, and the shutter 820 is A sound hole 821 is opened, and the sound hole 821 is opposite to the dome 211.
  • the shutter 820 is a metal piece, and there are four sound outlet holes 821.
  • the audio device provided by the present application includes the above-mentioned speaker 10, and thus has all the beneficial effects of the above-mentioned speaker 10, which will not be repeated here.

Abstract

本申请提供了一种扬声器及音频设备，扬声器包括后盖、音膜、盆架、振动系统及磁路系统，振动系统包括振膜，磁路系统包括磁碗，振膜、磁碗及盆架围合形成内腔，后盖位于磁碗的背向振膜的一侧，并与磁碗围合形成后腔，后腔连通于内腔；后盖包括与磁碗相对设置的顶壁，以及连接于顶壁四周并与盆架连接的侧壁，侧壁上设有第一通孔，音膜固定于后盖并盖封第一通孔。如此，振膜振动使内腔中空气的压缩能够影响到后腔内空气的流动，后腔空气的变化会引起音膜的振动，从而加大后腔的体积，使Fo下降，提高扬声器的低频灵敏度、有效减少功耗；将音膜设在侧壁，使顶壁可用于与音频设备的机壳软接触配合，有效降低扬声器振动导致的机壳振动的风险。

Description

扬声器及音频设备 技术领域
本申请涉及电声转换技术领域，尤其涉及一种扬声器及音频设备。
 背景技术
扬声器是一种常用的电子元器件，主要用于音频信号的播放，其工作原理是在磁铁构成的磁气回路里内置音圈，音圈流过的电流、产生上下方向的驱动力，使振膜振动由此使空气振动来出音。
随着科学技术的进步，具有音频功能的电子设备（以下简称音频设备）的普及率越来越高，尤其是随着4G、5G时代的到来，人们对音频设备扬声器的性能要求也越来越高。
 技术问题
然而，现有的扬声器依然存在的低频灵敏性低，功耗较高的问题，无法满足用户对扬声器性能要求和成本要求。
因此，有必要提供一种新的扬声器以解决上述技术问题。
 技术解决方案
本申请的目的在于提供一种扬声器，以解决目前扬声器的低频灵敏度低、功耗较高的技术问题。
本申请的技术方案如下：
提供了一种扬声器，所述扬声器包括具有收容空间的盆架以及收容于所述收容空间内的振动系统和磁路系统，所述振动系统包括固定于所述盆架且用于振动发声的振膜，所述磁路系统包括固定于所述盆架的磁碗；
所述振膜及所述磁碗与所述盆架围合形成内腔，所述扬声器还包括位于所述磁碗的背向所述振膜的一侧并与所述磁碗围合形成后腔的后盖，所述后腔连通于所述内腔；
所述后盖包括与所述磁碗相对设置的顶壁，以及连接于所述顶壁四周并与所述盆架连接的侧壁，所述侧壁上设有第一通孔，所述扬声器还包括固定于所述后盖并盖封所述第一通孔的音膜。
作为一种改进，所述磁路系统还包括固定于所述磁碗的磁体单元，所述磁体单元设有沿振动方向贯穿其上的第二通孔，所述磁碗设有与所述第二通孔连通的第三通孔，所述第二通孔及所述第三通孔贯通所述内腔及所述后腔。
作为一种改进，所述扬声器还包括透气隔膜，所述透气隔膜盖封所述第二通孔及所述第三通孔中的至少一个。
作为一种改进，所述振动系统还包括驱动所述振膜振动发声的音圈，所述磁体单元包括第一磁体部及环绕所述第一磁体部设置的第二磁体部，所述第一磁体部与所述第二磁体部之间留有磁间隙，所述音圈插入所述磁间隙内并环绕所述第一磁体部。
作为一种改进，所述振膜包括位于中间位置的球顶及与所述球顶固定连接的折环，所述折环与所述盆架连接。
作为一种改进，所述扬声器还包括定心支片，所述定心支片电性连接所述音圈与外部电路。
作为一种改进，所述音膜为平板状。
作为一种改进，所述音膜包括位于中间位置的平板部以及围绕所述平板部的弯折部，所述弯折部自所述平板部向远离所述后腔的方向凸出。
作为一种改进，所述后盖上设有透气孔，所述透气孔连通所述后腔与外部空间。
本申请还提供了一种音频设备，所述音频设备包括机壳，以及上述扬声器，所述顶壁与所述机壳软接触配合。
 有益效果
本申请提供的扬声器的有益效果在于：由于内腔与后腔连通，振膜振动使内腔中空气的压缩能够影响到后腔内空气的流动；后腔空气的变化会引起音膜的振动，从而加大后腔的体积，使Fo，即最低共振周波数下降，进而提高扬声器的低频灵敏度，并有效减少功耗。而且，将音膜设置在后盖的侧壁而非顶壁，使得后盖的顶壁可以用于与音频设备的机壳软接触配合，从而有效降低扬声器振动导致的机壳振动的风险，进一步优化用户体验。
本申请提供的音频设备因采用了上述扬声器而具备了扬声器的全部有益效果，此处不再赘述。
 附图说明
图1为本申请提供的扬声器的结构示意图一；
图2为本申请提供的扬声器的结构示意图二；
图3为本申请提供的扬声器的俯视结构示意图；
图4为图3中A-A向剖视结构示意图；
图5为本申请提供的扬声器的爆炸结构示意图一；
图6为本申请提供的扬声器的爆炸结构示意图二。
 本发明的实施方式
需要说明的是，术语 “上”、“下”、“前”、“后”、“左”、“右”、 “顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。
下面结合附图和实施方式对本申请作进一步说明。
请参阅图1至图6，本申请公开了一种扬声器10，包括盆架100、振动系统200、磁路系统300、后盖400以及音膜500。其中，盆架100具有收容空间110，振动系统200与磁路系统300均收容于收容空间110内，磁路系统300驱动振动系统200振动发声。
具体地，振动系统200包括振膜210及音圈220，振膜210固定于盆架100且用于振动发声，磁路系统300包括磁体单元320及磁碗310，磁碗310固定于盆架，在本实施例中，振膜210、磁碗310及盆架100围合形成内腔11，后盖400连接于盆架100，并位于磁碗310的背向振膜210的一侧，该后盖400与磁碗310围合形成有后腔12，内腔11与后腔12相互连通。后盖400包括顶壁410及侧壁420，其中，顶壁410与磁碗310相对设置，侧壁420连接于顶壁410的四周，并与盆架100连接，另外，在侧壁420上开设有第一通孔421，该第一通孔421连通后腔12与外部空间，音膜500连接于后盖400并盖封该第一通孔421，优选地，该音膜500为弹性件。
如此，由于内腔11与后腔12连通，振膜210振动使内腔11中空气的压缩能够影响到后腔12内空气的流动，后腔12空气的变化会引起音膜500的振动，从而加大后腔12的体积，使Fo（最低共振周波数）下降，进而提高扬声器10的低频灵敏度，并有效减少功耗。而且，将音膜500设置在后盖400的侧壁420而非顶壁410，使得后盖400的顶壁410可以用于与音频设备的机壳接触配合，从而有效降低扬声器10振动导致的机壳振动的风险，进一步优化用户体验。
优选地，该音膜500与后盖400胶合连接。
在一实施例中，音膜500为平板状。如此，加工和装配难度低，有助于节约成本。
在另一实施例中，该音膜500包括位于中间位置的平板部510及围绕平板部510的弯折部520，弯折部520连接于平板部510，并自成环状，且在本实施例中，该弯折部520自平板部510朝远离后腔12的方向凸出，如此，可以进一步加大后腔12的体积，优化低频灵敏度，降低功耗。
在一实施例中，该磁体单元320固定于磁碗100，具体地，该磁体单元320叠设在磁碗310的面向振膜210的一侧，其中，磁体单元320设有沿振动方向贯穿其上的第二通孔3213，磁碗310设有与第二通孔3213连通的第三通孔311，也即，第二通孔3213与第三通孔311贯通内腔11及后腔12，内腔11和后腔12通过该第二通孔3213和第三通孔311相互连通。
在一实施例中，该扬声器10还包括透气隔膜700，该透气隔膜700连接于磁体单元320，并封堵第二通孔3213，如此，既能满足内腔11与后腔12连通的条件，又起到一定的阻隔作用，使内腔11与后腔12的气体连通速度维持在一定的范围内，确保扬声器10的发声质量。
在本申请的其他实施例中，透气隔膜700封堵第二通孔3213及第三通孔311中的至少一个，也即，该透气隔膜700也可以封堵第三通孔311，或者同时封堵第二通孔3213及第三通孔311，此处不做唯一限定。
在一实施例中，磁体单元320包括第一磁体部321和第二磁体部322，其中第二磁体部322环绕设置在第一磁体部321周围，且与该第一磁体部321之间留有磁间隙324，也即，该第一磁体部321与第二磁体部322之间留有的间隙满足二者之间存在磁感应的条件。另外，在本实施例中，该第一磁体部321与第二磁体部322中的至少一个为永磁体。
上述音圈220的一端插入磁间隙，另一端与上述振膜210接触配合，如此，音圈220通电后流过的电流置身于第一磁体部321与第二磁体部322之间的磁感线当中，电流变化即可产生相应的电磁感应力，从而驱动振膜210振动发声。
在一实施例中，该第一磁体部321包括主磁钢3211及主极芯3212，主极芯3212叠设于主磁钢3211的靠近振膜210的一侧，上述透气隔膜700被夹持于主极芯3212与主磁钢3211之间；第二磁体部322包括两副磁钢3221及两边磁钢3222，其中两副磁钢3221分别位于该主磁钢3211的左右两侧，两边磁钢3222分别位于主磁钢3211的前后两侧。
另外，在一实施例中，磁体单元320还包括上夹板323，该上夹板323叠设于两副磁钢3221及两边磁钢3222的靠近振膜210的一侧，并且与盆架100连接，从而将两副磁钢3221及两边磁钢3222的位置固定。
在一实施例中，磁碗310包括底板及连接在底板相对两端的两边板，两边板相对于底板平面朝向振膜210所在的方向延伸形成凹槽，上述主磁钢3211、副磁钢3221以及边磁钢3222均设于该凹槽内。从而使扬声器10内部的结构更加紧凑而稳定，及优化了空间占有量，也提高了结构的可靠性。
在一实施例中，该振膜210包括位于中间位置的球顶211及与球顶211固定连接的折环212，也即，折环212连接于球顶211的周围，并且，折环212与盆架100连接，从而实现对球顶211的间接定位，球顶211与上述音圈220的伸出于磁间隙324的一端接触配合。另外，折环212自球顶211所在的平面朝向后腔12所在的方向弯折延伸。
在一实施例中，扬声器10还包括定心支片900，该定心支片900为导电件，分设于音圈220的相对两侧并与音圈220电性连接，并且该定心支片900的一端伸出于盆架100之外，用于与外部电源电性连接，也即，定心支片900电性连接该音圈220与外部电路。在本实施例中，该定心支片900一方面起到稳定振动的作用，另一方面为音圈220引入电能，起导电作用。
在一实施例中，后盖400的顶壁410上设有透气孔411，该透气孔411连通后腔12及外部空间，且该透气孔411由一透气膜430盖封。如此，可以起到有效的泄压作用。当然，在本申请的其他实施例中，该透气孔411还可以设置在侧壁420上，其数量也可以视实际需要有所增加，此处不做唯一限定。
在一实施例中，扬声器10还包括前盖800，该前盖800包括遮板820及前框810，其中，前框810连接于遮板820的四周并与盆架100连接，遮板820上开设有出声孔821，该出声孔821正对于球顶211。如此，一方面对球顶211及折环212起到一定的保护作用，另一方面方便球顶211振动发出的声音顺利的传播出来。优选地，遮板820为金属件，出声孔821设有四个。
本申请提供的音频设备，包括上述扬声器10，因而具备了上述扬声器10所具有的全部有益效果，此处不再赘述。
以上的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (10)

  1. 一种扬声器，其特征在于：所述扬声器包括具有收容空间的盆架以及收容于所述收容空间内的振动系统和磁路系统，所述振动系统包括固定于所述盆架且用于振动发声的振膜，所述磁路系统包括固定于所述盆架的磁碗；
    所述振膜及所述磁碗与所述盆架围合形成内腔，所述扬声器还包括位于所述磁碗的背向所述振膜的一侧并与所述磁碗围合形成后腔的后盖，所述后腔连通于所述内腔；
    所述后盖包括与所述磁碗相对设置的顶壁，以及连接于所述顶壁四周并与所述盆架连接的侧壁，所述侧壁上设有第一通孔，所述扬声器还包括固定于所述后盖并盖封所述第一通孔的音膜。
  2. 根据权利要求1所述的扬声器，其特征在于：所述磁路系统还包括固定于所述磁碗的磁体单元，所述磁体单元设有沿振动方向贯穿其上的第二通孔，所述磁碗设有与所述第二通孔连通的第三通孔，所述第二通孔及所述第三通孔贯通所述内腔及所述后腔。
  3. 根据权利要求2所述的扬声器，其特征在于：所述扬声器还包括透气隔膜，所述透气隔膜盖封所述第二通孔及所述第三通孔中的至少一个。
  4. 根据权利要求2所述的扬声器，其特征在于：所述振动系统还包括驱动所述振膜振动发声的音圈，所述磁体单元包括第一磁体部及环绕所述第一磁体部设置的第二磁体部，所述第一磁体部与所述第二磁体部之间留有磁间隙，所述音圈插入所述磁间隙内并环绕所述第一磁体部。
  5. 根据权利要求4所述的扬声器，其特征在于：所述振膜包括位于中间位置的球顶及与所述球顶固定连接的折环，所述折环与所述盆架连接。
  6. 根据权利要求4所述的扬声器，其特征在于：所述扬声器还包括定心支片，所述定心支片电性连接所述音圈与外部电路。
  7. 根据权利要求1至6任一项所述的扬声器，其特征在于：所述音膜为平板状。
  8. 根据权利要求1至6任一项所述的扬声器，其特征在于：所述音膜包括位于中间位置的平板部以及围绕所述平板部的弯折部，所述弯折部自所述平板部向远离所述后腔的方向凸出。
  9. 根据权利要求1至6任一项所述的扬声器，其特征在于：所述后盖上设有透气孔，所述透气孔连通所述后腔与外部空间。
  10. 一种音频设备，其特征在于：所述音频设备包括机壳，以及权利要求1至9任一项所述扬声器，所述顶壁与所述机壳软接触配合。
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