WO2023159989A1 - 发声装置和电子设备 - Google Patents

发声装置和电子设备 Download PDF

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Publication number
WO2023159989A1
WO2023159989A1 PCT/CN2022/127358 CN2022127358W WO2023159989A1 WO 2023159989 A1 WO2023159989 A1 WO 2023159989A1 CN 2022127358 W CN2022127358 W CN 2022127358W WO 2023159989 A1 WO2023159989 A1 WO 2023159989A1
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WO
WIPO (PCT)
Prior art keywords
housing
diaphragm
sound
magnetic
voice coil
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PCT/CN2022/127358
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English (en)
French (fr)
Inventor
蔡晓东
张琳琳
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歌尔股份有限公司
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Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2023159989A1 publication Critical patent/WO2023159989A1/zh

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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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • 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
    • H04R9/04—Construction, mounting, or centering of coil
    • 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

  • the invention relates to the technical field of electroacoustic conversion, in particular to a sound generating device and electronic equipment.
  • the sound generating device is an important electro-acoustic transducer element in electronic products, which is used to convert the current signal into sound.
  • the sounding device is usually equipped with a voice coil located in the rear acoustic cavity. During the working process, the voice coil will inevitably generate heat, which needs to be dissipated. At the same time, in order to stabilize the vibration of the diaphragm of the sounding device, it is also necessary to balance the internal and external air pressure of the sounding device. .
  • the main purpose of the present invention is to provide a sound generating device, which is beneficial to heat dissipation and air pressure balance of the sound generating device.
  • the sounding device proposed by the present invention includes:
  • the vibration system is located in the housing, the vibration system includes a diaphragm and a voice coil connected to the diaphragm, the voice coil is flat, and the axial direction of the voice coil is perpendicular to the direction of the diaphragm In the direction of vibration, the opposite sides of the diaphragm respectively form the acoustic side and the rear acoustic cavity, and the diaphragm is arranged in an arc shape and protrudes toward a direction away from the rear acoustic cavity; and
  • the magnetic circuit system is arranged in the housing, the magnetic circuit system includes a first magnetic assembly and a second magnetic assembly arranged in parallel and spaced apart, and a magnetic assembly is formed between the first magnetic assembly and the second magnetic assembly. Gap, the voice coil is inserted in the magnetic gap; wherein,
  • the housing is provided with an air pressure equalization hole communicating with the rear acoustic cavity.
  • the housing includes an upper shell and a lower shell
  • the air pressure equalization hole includes a first air hole provided in the upper shell and a second air hole provided in the lower shell, the first air hole is connected to the lower shell The second air hole is connected.
  • the lower shell is provided with an inserting protrusion inserted into the first air hole, and the second air hole passes through the inserting protrusion.
  • the insertion depth of the insertion protrusion in the first air hole is smaller than the depth of the first air hole.
  • the air pressure equalization hole is provided at one end of the housing along the arc extending direction of the diaphragm.
  • the sound generating device further includes a waterproof and gas-permeable membrane disposed on the housing, and the waterproof and gas-permeable membrane covers the air pressure equalization hole.
  • the waterproof and gas-permeable membrane is arranged on a side of the housing close to the rear acoustic cavity.
  • the first magnetic assembly includes a plurality of first magnets and first magnetic plates arranged in layers, the magnetization direction of the first magnets is the same as the vibration direction of the diaphragm, and any adjacent The magnetization directions of the two first magnets are opposite;
  • the second magnetic assembly is respectively provided with a second magnet and a second magnetic conductive plate corresponding to each first magnet and the first magnetic conductive plate, and the magnetization direction of the second magnet and the magnetization direction of the first magnet opposite to it in the opposite direction.
  • the present invention also proposes an electronic device comprising:
  • the equipment housing at least includes an arc-shaped wall section, and the arc-shaped wall section is provided with a sound outlet;
  • the sound emitting device is attached and installed on the arc-shaped wall section, and the sound emitting side and the air pressure equalization hole are arranged corresponding to the sound outlet.
  • a dust-proof net is further provided between the equipment shell and the sound-generating device, and the dust-proof net covers the sound outlet.
  • the electronic device is a smart watch or smart bracelet.
  • the technical scheme of the present invention directly arranges the air pressure equalization hole on the shell of the sounding device, which is beneficial to the heat dissipation and air pressure balance of the sounding device; in addition, the sounding device of the present invention adopts a flat voice coil, which can produce sound in a small Under the volume of the device, better acoustic performance is achieved, which is conducive to the miniaturization of the sound generating device, so as to facilitate the use of the sound generating device on smaller electronic devices; moreover, the setting of the curved diaphragm can make full use of The space of the arc-shaped shell of the electronic equipment makes the vibration space of the voice coil larger and the vibration amplitude of the diaphragm larger without increasing the volume and shape of the electronic equipment and changing the space occupied by the sounding device, thereby improving the sounding device. acoustic performance.
  • Fig. 1 is a structural schematic diagram of an embodiment of the sounding device of the present invention; wherein, the voice coil and the magnetic circuit system are hidden;
  • Fig. 2 is a schematic cross-sectional structure diagram of the sounding device in Fig. 1;
  • FIG. 3 is a schematic structural diagram of an embodiment of the electronic device of the present invention.
  • FIG. 4 is a schematic diagram of a partial cross-sectional structure of the electronic device in FIG. 3 .
  • the directional indication is only used to explain the relationship between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly.
  • the invention provides a sound generating device.
  • the sounding device 2 includes:
  • the vibration system located in the housing 23, the vibration system includes a diaphragm 21 and a voice coil 25 connected to the diaphragm 21, the voice coil 25 is flat, and the axial direction of the voice coil 25 is vertical
  • the opposite sides of the diaphragm 21 respectively form a sound side and a rear acoustic cavity, and the diaphragm 21 is arranged in an arc and protrudes toward a direction away from the rear acoustic cavity; as well as
  • the magnetic circuit system is arranged in the housing 23, the magnetic circuit system includes a first magnetic assembly 271 and a second magnetic assembly 272 arranged in parallel and spaced apart, the first magnetic assembly 271 and the second magnetic assembly A magnetic gap is formed between 272, and the voice coil 25 is inserted in the magnetic gap; wherein,
  • the casing 23 is provided with an air pressure equalization hole 20 communicating with the rear acoustic cavity.
  • the housing 23 is also arranged in a curved shape, so that the two can be matched and installed; it can be understood that for electronic devices such as smart watches and smart bracelets, , most of the equipment shells 10 are circular or elliptical, or have at least one or more arc-shaped side walls, and the arc-shaped diaphragm 21 is conducive to fitting with the arc-shaped wall segments on these equipment shells 10, The space of the curved housing portion of the electronic device is thus utilized for charging.
  • the magnetic circuit system further includes a magnetically permeable yoke 26 , and the first magnetic assembly 271 and the second magnetic assembly 272 are both disposed on the magnetically permeable yoke 26 .
  • the surface of the magnetic yoke 26 facing away from the vibration system is arranged in a plane, so as to facilitate the stable installation of the sound generating device 2 on the electronic equipment.
  • the air pressure equalization hole 20 is directly arranged on the housing 23 of the sounding device 2, which is beneficial to the heat dissipation and air pressure balance of the sounding device 2; in addition, the sounding device of the present invention adopts a flat voice coil 25, which can Under the smaller volume of the sounding device 2, better acoustic performance is achieved, which is conducive to the miniaturization of the sounding device, so as to facilitate the use of the sounding device on smaller electronic devices; moreover, the curved diaphragm
  • the setting of 21 can make full use of the space of the arc-shaped housing part of the electronic equipment, without increasing the volume and shape of the electronic equipment, and without changing the space occupied by the sound generating device 2, the vibration space of the voice coil 25 is larger, and the space of the diaphragm 21 is larger. The vibration amplitude is larger, thereby improving the acoustic performance of the sound generating device 2 .
  • the housing 23 includes an upper shell 231 and a lower shell 232
  • the air pressure equalization hole 20 includes a first air hole 201 provided on the upper shell 231 and a second air hole 202 provided on the lower shell 232
  • the first air hole 201 communicates with the second air hole 202 to ensure the smoothness of the air pressure equalization hole 20
  • the diaphragm 21 is integrally connected with the upper case 231, so that during assembly, after the lower case 232 is placed on the magnetic circuit system, the integrated diaphragm 21 and the upper case 231 are installed in a modular manner To the lower shell 232, the modular installation of the product is realized, and the assembly efficiency is improved.
  • the diaphragm 21 and the upper shell 231 can be connected as a whole by hot pressing or injection molding, but not limited to, so that, on the one hand, the seamless combination between the diaphragm 21 and the upper shell 231 can be realized , improve the waterproof ability to meet the needs of high-level waterproof, on the other hand, it can simplify the assembly process of materials, save manpower and material resources, and on the other hand, the bonding force between the diaphragm 21 and the upper shell 231 is strong, and it is not easy to separate and fail.
  • the lower shell 232 is provided with an inserting protrusion 234 inserted into the first air hole 201 , so that the upper shell 234 can be installed in alignment with the first air hole 201 to realize the upper positioning installation between the shell 231 and the lower shell 232;
  • the cooperation of an air hole 201 realizes the fixed connection between the upper shell 231 and the lower shell 232 .
  • the second air hole 202 passes through the insertion protrusion 234 to realize communication between the second air hole 202 and the first air hole 201 .
  • the insertion depth of the insertion protrusion 234 in the first air hole 201 is smaller than the hole depth of the first air hole 201; While positioning and installing between them, the outer hole section of the air pressure equalization hole 20 (the part of the first air hole 201 that is not inserted by the insertion protrusion 234) is larger, thereby reducing the air pressure equalization hole 20 being sealed. blocking risk.
  • the air pressure equalization hole 20 is provided at one end of the casing 23 along the arc extending direction of the diaphragm 21 . It can be understood that, in the arc-shaped extension direction of the diaphragm 21, the housing 23 is usually arranged in a long strip shape, and the two ends of the housing 23 in the length direction usually have a larger position, which is more conducive to The opening of the air pressure equalization hole 20 .
  • the sound generating device 2 further includes a waterproof and gas-permeable membrane 24 disposed on the casing 23 , and the waterproof and gas-permeable film 24 covers the air pressure equalization hole 20 to improve the waterproof performance of the sound generating device 2 .
  • the waterproof and gas-permeable membrane 24 is glued to the housing 23. The bonding method can not only realize the connection between the two parts, but also make the connection between the two parts sealed, so as to further improve the product quality. waterproof performance.
  • the waterproof and gas-permeable membrane 24 is disposed on a side of the housing 23 close to the rear acoustic cavity. That is, the waterproof and gas-permeable membrane 24 is located inside the housing 23 , so that the housing 23 can provide protection for the waterproof and gas-permeable membrane 24 , reducing the probability of damage to the waterproof and gas-permeable membrane 24 .
  • the design is not limited thereto.
  • the waterproof and breathable membrane 24 can also be arranged on the side of the housing 23 close to the sound-emitting side, that is, the waterproof and breathable membrane 24 is located on the The outer side of the casing 23, in this way, can facilitate the replacement of the waterproof and gas-permeable membrane 24.
  • the first magnetic assembly 271 includes two first magnets 271a and two first magnetically conductive plates 291 stacked on top of each other, and the magnetization direction of the first magnets 271a is the same as that of the diaphragm 21 have the same vibration direction, and the magnetization directions of the two first magnets 271a are opposite;
  • the second magnetic assembly 272 is provided with a second magnet 272a and A second magnetically conductive plate 292, the magnetization direction of the second magnet 272a is opposite to the magnetization direction of the first magnet 271a opposite to it;
  • the voice coil 25 has two Straight sections arranged at intervals and with opposite current directions, wherein one of the straight sections is located in the magnetic gap formed by a pair of first magnetically conductive plates 291 and second magnetically conductive plates 292 close to one end of the diaphragm 21 , the other said straight section is located in the magnetic gap formed by another pair of first magnetically permeable plate 291 and second magnetically permeable plate 292 away from one end of
  • first magnet 271a and one second magnet 272a may be provided, and the voice coil 25 is arranged between the first magnet 271a and the second magnet 272a;
  • three or more first magnets 271a may also be provided, and for the three or more first magnets 271a, the magnetization of any two adjacent first magnets 271a In the opposite direction, the number and position of the second magnets 272a are set accordingly.
  • the number of voice coils 25 increases accordingly, and a voice coil can be arranged between each pair of first magnets 271a and second magnets 272a 25 , a plurality of voice coils 25 are arranged sequentially along the vibration direction of the diaphragm 21 and fixed together sequentially.
  • the magnet closest to the diaphragm 21 is provided with a first magnetic conductive plate 291 to improve the utilization rate of the magnetic field.
  • a second magnetic conductive plate 292 is provided between any two adjacent magnets, so as to further improve the utilization rate of the magnetic field.
  • the present invention also proposes an electronic device.
  • the electronic device includes a device case 10 and a sounding device 2.
  • the sounding device 2 refer to the above-mentioned embodiments. Since this electronic device adopts all the above-mentioned embodiments All the technical solutions of the present invention, therefore at least have all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be repeated here.
  • the side wall of the device housing 10 includes at least one arc-shaped wall segment, and the arc-shaped wall segment is provided with a sound outlet 100 .
  • the sound generating device 2 is attached to the arc-shaped wall section, that is, the housing 23 and the diaphragm 21 are attached to the arc-shaped wall section.
  • the sound output side is set corresponding to the sound output port 100 to facilitate sound generation.
  • the air pressure equalization hole 20 is also provided corresponding to the sound outlet 100 , so as to pass through the air pressure equalization hole 20 and the sound outlet 100 sequentially for heat dissipation and air pressure equalization.
  • the electronic device may be, but not limited to, a smart watch, a smart bracelet, etc., and its device case 10 may be circular or oval. In this case, the entire side wall of its device case 10 is arc-shaped.
  • the device case 10 may only have one or more arc-shaped side walls, for example but not limited to, the two ends in the length direction are flat, and the two sides in the width direction are arc-shaped.
  • the electronic device also includes a dust-proof net 28, and the dust-proof net 28 at least covers the air pressure equalization hole 20, so as to reduce the risk of dust and other dirt blocking the air pressure equalization hole 20.
  • the dust-proof net 28 also covers the diaphragm 21 to reduce the risk of dust and other dirt adhering to the diaphragm 21, thereby affecting the vibration of the diaphragm 21; it can be understood that in this case, The dust-proof net 28 is usually set to cover the entire sound outlet 100 .
  • the dust-proof net 28 is arranged between the equipment case 10 and the sound generating device 2 .
  • the dust-proof net 28 may only be attached to the casing 23 , or may only be attached to the device case 10 , or may be attached to the case 23 and the device case 10 at the same time.
  • the housing 23 is provided with a mounting protrusion 233 , and the dust filter 28 is mounted on the mounting protrusion 233 so as to be attached to the housing 23 .
  • the installation protrusion 233 is usually arranged close to the edge of the dust-proof net 28 , so as to restrict the edge of the dust-proof net 28 from curling toward the middle through the installation protrusion 233 .
  • at least one installation protrusion 233 is provided on both ends of the casing 23 along the arc-shaped extension direction of the diaphragm 21, so as to at least limit the direction of the two ends of the dust-proof net 28.
  • the middle is crimped to improve the assembly reliability of the dust-proof net 28 .
  • the air pressure equalization hole 20 is opened on a side of one installation protrusion 233 close to the other installation protrusion 233 , so as to ensure that the dust-proof net 28 can cover the air pressure equalization hole 20 .
  • the device case 10 is provided with an abutment protrusion 101 on the sound outlet 100, and the abutment protrusion 101 supports the dust-proof net 28 on the housing 23; It should be understood that, in this embodiment, the dust-proof net 28 is sandwiched between the device case 10 and the housing 23 .
  • the dust-proof net 28 can also be fixed to the casing 23 and/or the device case 10 , but not limited thereto.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本发明公开一种发声装置和电子设备，其中，发声装置包括：壳体；振动系统，设于所述壳体，所述振动系统包括振膜和与所述振膜连接的音圈，所述音圈呈扁平状，所述音圈的轴向垂直于所述振膜的振动方向，所述振膜的相对两侧分别形成出声侧和后声腔，所述振膜呈弧形设置，且朝远离所述后声腔的方向凸出；以及磁路系统，设于所述壳体，所述磁路系统包括平行且相间隔设置的第一磁组件和第二磁组件，所述第一磁组件和所述第二磁组件之间形成磁间隙，所述音圈插设于所述磁间隙；其中，所述壳体设有与所述后声腔连通的气压均衡孔。本发明的技术方案有利于发声装置的散热及气压均衡。

Description

发声装置和电子设备 技术领域
本发明涉及电声转换技术领域，特别涉及一种发声装置和电子设备。
背景技术
发声装置是电子产品中重要的电声换能元件，用于将电流信号转换成声音。发声装置通常设有位于后声腔的音圈，在工作过程中，音圈难免会产生热量，这些热量需要散发出去，同时为使发声装置的振膜的振动稳定，还需要均衡发声装置的内外气压。
发明内容
本发明的主要目的是提出一种发声装置，旨在有利于发声装置的散热及气压均衡。
为实现上述目的，本发明提出的发声装置包括：
壳体；
振动系统，设于所述壳体，所述振动系统包括振膜和与所述振膜连接的音圈，所述音圈呈扁平状，所述音圈的轴向垂直于所述振膜的振动方向，所述振膜的相对两侧分别形成出声侧和后声腔，所述振膜呈弧形设置，且朝远离所述后声腔的方向凸出；以及
磁路系统，设于所述壳体，所述磁路系统包括平行且相间隔设置的第一磁组件和第二磁组件，所述第一磁组件和所述第二磁组件之间形成磁间隙，所述音圈插设于所述磁间隙；其中，
所述壳体设有与所述后声腔连通的气压均衡孔。
可选地，所述壳体包括上壳和下壳，所述气压均衡孔包括设于所述上壳的第一气孔和设于所述下壳的第二气孔，所述第一气孔与所述第二气孔相连通。
可选地，所述下壳设有插入所述第一气孔的插接凸部，所述第二气孔贯 穿所述插接凸部。
可选地，所述插接凸部在所述第一气孔内的插入深度小于所述第一气孔的孔深。
可选地，所述气压均衡孔设于所述壳体的沿所述振膜弧形延伸方向上的一端。
可选地，所述发声装置还包括设于所述壳体的防水透气膜，所述防水透气膜覆盖所述气压均衡孔。
可选地，所述防水透气膜设于所述壳体的靠近所述后声腔的一侧。
可选地，所述第一磁组件包括相层叠设置的多个第一磁体和第一导磁板，所述第一磁体的充磁方向与所述振膜的振动方向相同，且任意相邻的两个第一磁体的充磁方向相反；
所述第二磁组件对应每一第一磁体和第一导磁板分别设有一第二磁体和第二导磁板，所述第二磁体的充磁方向和与其相对的第一磁体的充磁方向相反。
本发明还提出一种电子设备包括：
设备壳，所述设备壳的侧壁至少包括一段弧形壁段，所述弧形壁段开设有出声口；以及
前述的发声装置，所述发声装置贴合安装于所述弧形壁段，所述出声侧和所述气压均衡孔均对应所述出声口设置。
可选地，所述设备壳和所述发声装置之间还设有防尘网，所述防尘网覆盖所述出声口。
可选地，所述电子设备为智能手表或智能手环。
本发明的技术方案通过将气压均衡孔直接设置在发声装置的壳体上，有利于发声装置的散热及气压均衡；此外，本发明的发声装置采用扁平状的音圈，能在较小的发声装置体积下，实现较好的声学性能，有利于发声装置的小型化，以有利于发声装置在较小体积的电子装置上的使用；再者，呈弧形的振膜的设置，能充分利用电子设备弧形外壳部分的空间，在不增加电子设备体积和形状、不改变发声装置占用空间的情况下，使得音圈的振动空间更 大、振膜的振动幅度更大，从而提升发声装置的声学性能。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术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示出的结构获得其他的附图。
图1为本发明发声装置一实施例的结构示意图；其中，音圈和磁路系统隐藏；
图2为图1中发声装置的截面结构示意图；
图3为本发明电子设备一实施例的结构示意图；
图4为图3中电子设备的局部截面结构示意图。
附图标号说明：
标号 名称 标号 名称
10 设备壳 100 出声口
101 抵接凸部 2 发声装置
21 振膜 20 气压均衡孔
201 第一气孔 202 第二气孔
23 壳体 231 上壳
232 下壳 24 防水透气膜
25 音圈 26 导磁轭
271 第一磁组件 271a 第一磁体
272 第二磁组件 272a 第二磁体
28 防尘网 291 第一导磁板
292 第二导磁板 233 安装凸起
234 插接凸部    
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
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，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，若全文中出现的“和/或”或者“及/或”，其含义包括三个并列的方案，以“A和/或B”为例，包括A方案、或B方案、或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种发声装置。
参照图1至图4，在本发明一实施例中，该发声装置2包括：
壳体23；
振动系统，设于所述壳体23，所述振动系统包括振膜21和与所述振膜21连接的音圈25，所述音圈25呈扁平状，所述音圈25的轴向垂直于所述振膜21的振动方向，所述振膜21的相对两侧分别形成出声侧和后声腔，所述振膜21呈弧形设置，且朝远离所述后声腔的方向凸出；以及
磁路系统，设于所述壳体23，所述磁路系统包括平行且相间隔设置的第一磁组件271和第二磁组件272，所述第一磁组件271和所述第二磁组件272之间形成磁间隙，所述音圈25插设于所述磁间隙；其中，
所述壳体23设有与所述后声腔连通的气压均衡孔20。
本实施例中，与呈弧形的振膜21相对应地，所述壳体23也呈弧形设置，以使二者相适配安装；可以理解，对于智能手表、智能手环等电子设备，其设备壳10大都呈圆形或者椭圆形、或者至少具备一段或者多段弧形的侧壁，呈弧形设置的振膜21有利于与这些设备壳10上的弧形壁段相贴合，从而充能利用电子设备的弧形外壳部分的空间。可选地，所述磁路系统还包括导磁轭26，所述第一磁组件271和所述第二磁组件272均设于所述导磁轭26上。可选地，所述导磁轭26的背离所述振动系统的表面呈平面设置，以有利于发声装置2在电子设备上的稳定安装。
本发明的技术方案通过将气压均衡孔20直接设置在发声装置2的壳体23上，有利于发声装置2的散热及气压均衡；此外，本发明的发声装置采用扁平状的音圈25，能在较小的发声装置2体积下，实现较好的声学性能，有利于发声装置的小型化，以有利于发声装置在较小体积的电子装置上的使用；再者，呈弧形的振膜21的设置，能充分利用电子设备弧形外壳部分的空间，在不增加电子设备体积和形状、不改变发声装置2占用空间的情况下，使得音圈25的振动空间更大、振膜21的振动幅度更大，从而提升发声装置2的声学性能。
进一步地，所述壳体23包括上壳231和下壳232，所述气压均衡孔20包括设于所述上壳231的第一气孔201和设于所述下壳232的第二气孔202，所述第一气孔201与所述第二气孔202相连通，以确保所述气压均衡孔20的通畅。可选地，所述振膜21与所述上壳231连接为一体，如此，装配时，在将下壳232设于磁路系统之后，将一体的振膜21与上壳231模块式地安装至下壳232，实现产品的模块化安装，提高装配效率。进一步可选地，所述振膜21与所述上壳231可但不限于通过热压或者注塑的方式连接为一体，如此，一方面能实现振膜21与上壳231之间的无缝结合，提升防水能力，满足高等级防水的需求，另一方面能简化物料的装配工序，节省人力物力，再一方面振膜21与上壳231之间的结合力大，不易分离失效。
进一步地，所述下壳232设有插入所述第一气孔201的插接凸部234，以通过所述插接凸部234与所述第一气孔201的对位安装，来实现所述上壳231与所述下壳232之间的定位安装；并且在所述插接凸部234紧配插接于所述 第一气孔201时，还能通过所述插接凸部234与所述第一气孔201的配合，来实现所述上壳231与所述下壳232之间的固定连接。不失一般性，本实施例中，所述第二气孔202贯穿所述插接凸部234，以实现所述第二气孔202与所述第一气孔201之间的连通。
可选地，，所述插接凸部234在所述第一气孔201内的插入深度小于所述第一气孔201的孔深；如此，能在实现所述上壳231与所述下壳232之间定位安装的同时，使得所述气压均衡孔20的靠外的孔段(第一气孔201的未被插接凸部234插入的部分)较大，从而降低所述气压均衡孔20被封堵风险。
进一步地，所述气压均衡孔20设于所述壳体23的沿所述振膜21弧形延伸方向上的一端。可以理解，在所述振膜21的弧形延伸方向上，所述壳体23通常呈长条形设置，而所述壳体23长度方向上的两端通常有更大的位置，更有利于所述气压均衡孔20的开设。
进一步地，所述发声装置2还包括设于所述壳体23的防水透气膜24，所述防水透气膜24覆盖所述气压均衡孔20，以提高所述发声装置2的防水性能。可选地，所述防水透气膜24粘固于所述壳体23，粘接的方式不仅能实现两个部件之间的连接，还能使连接的两个部件之间密封，以进一步提高产品的防水性能。
可选地，所述防水透气膜24设于所述壳体23的靠近所述后声腔的一侧。也即，所述防水透气膜24位于所述壳体23内侧，使得所述壳体23能为所述防水透气膜24提供防护，降低所述防水透气膜24破损的概率。然本设计不限于此，于其他实施例中，所述防水透气膜24也可以设于所述壳体23的靠近所述出声侧的一侧，也即所述防水透气膜24位于所述壳体23外侧，如此，可便于所述防水透气膜24的更换。
进一步地，参照图2，所述第一磁组件271包括相层叠设置的两个第一磁体271a和两个第一导磁板291，所述第一磁体271a的充磁方向与所述振膜21的振动方向相同，且该两个第一磁体271a的充磁方向相反；所述第二磁组件272对应每一第一磁体271a和每一第一导磁板291设有一第二磁体272a和一个第二导磁板292，所述第二磁体272a的充磁方向和与其相对的第一磁体271a的充磁方向相反；所述音圈25具有两条在所述振膜21的振动方向上间隔设置、且电流方向相反的平直段，其中一所述平直段位于靠近所述振膜21的一 端的一对第一导磁板291和第二导磁板292所形成的磁间隙中，另一所述平直段位于远离所述振膜21的一端的另一对第一导磁板291和第二导磁板292所形成的磁间隙中，如此，所述音圈25所受到的驱动力大，起振速度快。然本设计不限于此，于其他一些实施例中，也可仅设置一个第一磁体271a和一个第二磁体272a，将音圈25设于该第一磁体271a和第二磁体272a之间；而于其他再一些实施例中，还可以设置三个或三个以上的第一磁体271a，对于该三个或三个以上的第一磁体271a，任意相邻的两个第一磁体271a的充磁方向相反，第二磁体272a的个数和位置则相应设置，此种情况下，音圈25的个数相应增加，可以在每一对第一磁体271a和第二磁体272a之间配置一个音圈25，多个音圈25沿所述振膜21的振动方向依次排列设置，并依次固定在一起。
可选地，不管是第一磁组件271还是第二磁组件272，最靠近所述振膜21的磁体上设有第一导磁板291，以提高磁场利用率。进一步可选地，不管是第一磁组件271还是第二磁组件272，任意相邻的两个磁体之间设有第二导磁板292，以进一步提高磁场利用率。
本发明还提出一种电子设备，参照图1至图4，该电子设备包括设备壳10和发声装置2，该发声装置2的具体结构参照上述实施例，由于本电子设备采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。其中，所述设备壳10的侧壁至少包括一段弧形壁段，所述弧形壁段开设有出声口100。所述发声装置2贴合安装于所述弧形壁段，也即所述壳体23和所述振膜21贴合安装于所述弧形壁段。所述出声侧对应所述出声口100设置，以便于发声。所述气压均衡孔20也对应所述出声口100设置，以便于依次通过所述气压均衡孔20和所述出声口100进行散热及气压均衡。需要说明的是，所述电子设备可但不限于是智能手表、智能手环等，其设备壳10可以呈圆形或者椭圆形，此种情况下，其设备壳10的整个侧壁均呈弧形，当然，其设备壳10也可仅具有一段或者多段弧形的侧壁，例如但不限于其长度方向的两端是平整的，宽度方向的两侧则是呈弧形的。
进一步地，所述电子设备还包括防尘网28，所述防尘网28至少覆盖所述 气压均衡孔20，以降低灰尘等脏污将所述气压均衡孔20堵塞的风险。可选地，所述防尘网28还覆盖所述振膜21，以降低灰尘等脏污附着于所述振膜21，从而影响所述振膜21振动的风险；可以理解，此情况下，所述防尘网28通常设置为覆盖整个所述出声口100。
本发明中，所述防尘网28设于所述设备壳10和所述发声装置2之间。具体地，所述防尘网28可以仅安装依附于所述壳体23，也可以仅安装依附于所述设备壳10，还可以同时安装依附于所述壳体23和所述设备壳10。
可选地，所述壳体23上设有安装凸起233，所述防尘网28安装于所述安装凸起233，以安装依附于所述壳体23。本实施例中，所述安装凸起233通常靠近所述防尘网28的边缘设置，以通过所述安装凸起233限制所述防尘网28的边缘向中间卷缩。进一步可选地，所述壳体23的沿所述振膜21弧形延伸方向上的两端各设有至少一所述安装凸起233，以至少限制所述防尘网28的两端向中间卷缩，提高所述防尘网28的装配可靠性。可选地，所述气压均衡孔20开设在一所述安装凸起233的靠近另一所述安装凸起233的一侧，以确保所述防尘网28能覆盖所述气压均衡孔20。
可选地，所述设备壳10在所述出声口100上设有抵接凸部101，所述抵接凸部101将所述防尘网28抵持在所述壳体23上；可以理解，本实施例中，所述防尘网28夹固于所述设备壳10与所述壳体23之间。
当然，于其他实施例中，所述防尘网28还可但不限于粘固于所述壳体23和/或所述设备壳10。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (11)

  1. 一种发声装置，其特征在于，包括：
    壳体；
    振动系统，设于所述壳体，所述振动系统包括振膜和与所述振膜连接的音圈，所述音圈呈扁平状，所述音圈的轴向垂直于所述振膜的振动方向，所述振膜的相对两侧分别形成出声侧和后声腔，所述振膜呈弧形设置，且朝远离所述后声腔的方向凸出；以及
    磁路系统，设于所述壳体，所述磁路系统包括平行且相间隔设置的第一磁组件和第二磁组件，所述第一磁组件和所述第二磁组件之间形成磁间隙，所述音圈插设于所述磁间隙；其中，
    所述壳体设有与所述后声腔连通的气压均衡孔。
  2. 如权利要求1所述的发声装置，其特征在于，所述壳体包括上壳和下壳，所述气压均衡孔包括设于所述上壳的第一气孔和设于所述下壳的第二气孔，所述第一气孔与所述第二气孔相连通。
  3. 如权利要求2所述的发声装置，其特征在于，所述下壳设有插入所述第一气孔的插接凸部，所述第二气孔贯穿所述插接凸部。
  4. 如权利要求3所述的发声装置，其特征在于，所述插接凸部在所述第一气孔内的插入深度小于所述第一气孔的孔深。
  5. 如权利要求1所述的发声装置，其特征在于，所述气压均衡孔设于所述壳体的沿所述振膜弧形延伸方向上的一端。
  6. 如权利要求1所述的发声装置，其特征在于，所述发声装置还包括设于所述壳体的防水透气膜，所述防水透气膜覆盖所述气压均衡孔。
  7. 如权利要求6所述的发声装置，其特征在于，所述防水透气膜设于所 述壳体的靠近所述后声腔的一侧。
  8. 如权利要求1至7任一项所述的发声装置，其特征在于，所述第一磁组件包括相层叠设置的多个第一磁体和第一导磁板，所述第一磁体的充磁方向与所述振膜的振动方向相同，且任意相邻的两个第一磁体的充磁方向相反；
    所述第二磁组件对应每一第一磁体和第一导磁板分别设有一第二磁体和第二导磁板，所述第二磁体的充磁方向和与其相对的第一磁体的充磁方向相反。
  9. 一种电子设备，其特征在于，包括：
    设备壳，所述设备壳的侧壁至少包括一段弧形壁段，所述弧形壁段开设有出声口；以及
    如权利要求1至8任一项所述的发声装置，所述发声装置贴合安装于所述弧形壁段，所述出声侧和所述气压均衡孔均对应所述出声口设置。
  10. 如权利要求9所述的电子设备，其特征在于，所述设备壳和所述发声装置之间还设有防尘网，所述防尘网覆盖所述出声口。
  11. 如权利要求9或10所述的电子设备，其特征在于，所述电子设备为智能手表或智能手环。
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