WO2021248533A1 - 一种发声装置 - Google Patents

一种发声装置 Download PDF

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Publication number
WO2021248533A1
WO2021248533A1 PCT/CN2020/096740 CN2020096740W WO2021248533A1 WO 2021248533 A1 WO2021248533 A1 WO 2021248533A1 CN 2020096740 W CN2020096740 W CN 2020096740W WO 2021248533 A1 WO2021248533 A1 WO 2021248533A1
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Prior art keywords
magnetic steel
fixed
magnetic
fixedly connected
pole core
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PCT/CN2020/096740
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English (en)
French (fr)
Inventor
董献杰
张龙
令狐荣林
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声光电科技(常州)有限公司
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声光电科技(常州)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2021248533A1 publication Critical patent/WO2021248533A1/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

Definitions

  • This application relates to the technical field of electroacoustic devices, and in particular to a sound generating device.
  • the earphone core in the prior art generally uses cylindrical magnetic steel, which has a small volume and low magnetic force, which affects the vibration of the diaphragm and causes poor acoustic performance of the earphone.
  • the present application provides a sounding device, which can solve the problems of small volume and low magnetic force of the magnetic steel of the sounding device in the prior art.
  • a sound generating device which includes a housing frame with a housing space, a magnetic circuit system accommodated in the housing frame, and a vibration system fixed to the housing frame, the magnetic circuit system including a fixed A magnetic bowl on the housing frame, a first magnetic steel fixed to the magnetic bowl, a pole core fixed to the first magnetic steel on a side away from the magnetic bowl, and a pole core fixed to the pole core away from the first magnet A second magnetic steel on one side of the magnetic steel, the pole core includes a lower surface fixedly connected to the first magnetic steel and an upper surface fixedly connected to the second magnetic steel, and the first magnetic steel includes A first surface fixedly connected to the magnetic bowl and a second surface disposed opposite to the first surface and fixedly connected to the lower surface, and the second magnetic steel includes a third surface fixedly connected to the upper surface And a fourth surface opposite to the third surface, the pole core is provided with a first recess formed from the lower surface toward the upper surface and a recess from the upper surface toward
  • the magnetic bowl includes a bottom wall for fixing the first magnetic steel, and a side of the bottom wall fixedly connected to the first magnetic steel is provided with a recess formed in a direction away from the first magnetic steel
  • the first magnetic steel further includes a third convex portion protruding from the first surface toward the bottom wall, and the third convex portion is accommodated and attached to the third Depression.
  • the first protrusion and the third protrusion are tapered.
  • the second magnetic steel further includes a fourth protrusion extending from the fourth surface to a side away from the fourth surface.
  • the second protrusion and the fourth protrusion are tapered.
  • the magnetic bowl further includes a side wall bent and extended from the edge of the bottom wall, and the side wall is fixed to the housing frame.
  • the vibration system includes a diaphragm fixed on the housing frame and a voice coil fixed on the diaphragm and used to drive the diaphragm to vibrate
  • the diaphragm includes a spherical top at an intermediate position and a fixed A folding ring on the shell frame and surrounding the dome and a connecting part connecting the folding ring and the dome
  • the voice coil is fixed to the connecting part
  • the dome includes an intermediate position A central part and an outer peripheral part surrounding the central part, the outer peripheral part is fixedly connected to the connecting part, and the central part arches toward a direction away from the second magnetic steel.
  • the folding ring includes a first fixing part fixed on the housing frame, a second fixing part fixedly connected to the connecting part, and a vibration connecting the first fixing part and the second fixing part.
  • the sound generating device further includes a flexible circuit board that electrically connects the voice coil with an external circuit, and the flexible circuit board includes a third fixing portion fixed to the housing frame, fixed to the voice coil and connected to the A fourth fixing part between the parts and an elastic arm connecting the third fixing part and the fourth fixing part, the vibrating part is arranged opposite to the elastic arm and arches toward a direction away from the elastic arm.
  • the outer peripheral portion and the second fixing portion are both fixed to a side of the connecting portion away from the voice coil.
  • the voice coil is wound by a wire, and in the direction from the first magnet to the second magnet, so The number of winding layers of the wire gradually decreases.
  • the beneficial effect of the present application is that the surfaces of the first magnet and the second magnet increase the volume of the magnet through the protrusions, and at the same time, the magnetic bowl and the pole core are provided with corresponding recesses at the position where the magnet is connected to accommodate the protrusions.
  • the starting part increases the volume of the first magnet and the second magnet in the same space, increases the magnetic force, and improves the acoustic performance of the sound device.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a sound emitting device according to an embodiment of the application
  • FIG. 2 is a schematic diagram of an exploded structure of a sound generating device according to an embodiment of the application
  • Figure 3 is a cross-sectional view along line A-A in Figure 1;
  • FIG. 4 is a schematic diagram of an enlarged structure of area B in FIG. 3;
  • FIG. 5 is a schematic structural diagram of a voice coil according to an embodiment of the application.
  • first”, “second”, and “third” in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first”, “second”, and “third” may explicitly or implicitly include at least one of the features.
  • "a plurality of” means at least two, such as two, three, etc., unless otherwise specifically defined. All directional indicators (such as up, down, left, right, front, back%) in the embodiments of this application are only used to explain the relative positional relationship between the components in a specific posture (as shown in the figure) , Movement status, etc., if the specific posture changes, the directional indication will also change accordingly.
  • the terms “including” and “having” and any variations thereof are intended to cover non-exclusive inclusions.
  • FIG. 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the embodiment of the present application
  • FIG. 2 is an exploded structure diagram of the sound generating device of the embodiment of the present application, as shown in FIG. 1 and FIG.
  • the shell frame 10 the magnetic circuit system 20 accommodated in the accommodating space 11, and the vibration system 30 fixed on the shell frame 10.
  • the magnetic circuit system 20 includes a magnetic bowl 21 fixed to the housing frame 10, a first magnetic steel 22 fixed to the magnetic bowl 21, a pole core 23 fixed to the first magnetic steel 22 on the side away from the magnetic bowl 21, and The pole core 23 is away from the second magnet 24 on the side of the first magnet 22.
  • the central axes of the first magnet 22 and the second magnet 24 coincide with the central axis of the pole core 23, and the magnetizing direction of the first magnet 22 is opposite to the magnetizing direction of the second magnet 24.
  • the pole core 23 includes a lower surface 232 fixedly connected to the first magnetic steel 22 and an upper surface 231 fixedly connected to the second magnetic steel 24;
  • the magnetic bowl 21 includes a bottom wall 211 for fixing the first magnet 22 and a side wall 212 surrounding the bottom wall 211.
  • a magnetic gap 213 is formed between the side wall 212 and the first magnet 22.
  • the bottom wall 211 The side fixedly connected to the first magnetic steel 22 is provided with a third recess 214 formed in a direction away from the first magnetic steel 22.
  • the magnetic bowl 21 of this embodiment is circular, and the shape of the magnetic bowl 21 can be adjusted according to the shape of the first magnet 22.
  • the first magnet 22 includes a first surface 221 fixedly connected to the magnetic bowl 21, a second surface 222 disposed opposite to the first surface 221 and fixedly connected to the lower surface 232, and protrudes from the second surface 222 toward the pole core 23
  • the first protruding portion 223 and the third protruding portion 224 protruding from the first surface 221 toward the bottom wall 211, the first protruding portion 223 is received and attached to the first recessed portion 233, the third protruding portion 224 The receiving is attached to the third recessed portion 214.
  • the first convex portion 223 and the third convex portion 224 of this embodiment are cone-shaped, and the corresponding first concave portion 233 and the third concave portion 214 are inverted cone-shaped, and the angle of the cone angle can be adjusted according to actual needs. .
  • this arrangement increases the volume of the first magnetic steel 22, increases the magnetic force, and improves the acoustic performance of the sound device.
  • the second magnet 24 includes a third surface 241 fixedly connected to the upper surface 231, a fourth surface 242 disposed opposite to the third surface 241, and a second protrusion 243 protruding from the third surface 241 toward the upper surface 231 And a fourth protrusion 244 protrudingly extending from the fourth surface 242 to a side away from the fourth surface 242, and the second protrusion 243 is received and attached to the second recess 234.
  • the second protrusion 243 and the fourth protrusion 244 are tapered, and the corresponding second recess 234 is inverted tapered, and the angle of the taper angle can be adjusted according to actual needs. Compared with the traditional cylindrical magnetic steel, in the same space, the volume of the second magnetic steel 24 is increased, the magnetic force is improved, and the acoustic performance of the sound device is improved.
  • the vibration system 30 includes a diaphragm 31 fixed on the housing frame 10 and a voice coil 32 arranged in the magnetic gap 213 for driving the diaphragm 31 to vibrate.
  • the diaphragm 31 includes a dome 311 in the middle position, a folding ring 312 fixed on the housing frame 10 and surrounding the dome 311, and a connecting portion connecting the folding ring 312 and the dome 311 313.
  • the voice coil 32 is fixed to the connecting portion 313.
  • the dome 311 includes a central portion 3111 at the middle position and an outer peripheral portion 3112 surrounding the central portion 3111.
  • the outer peripheral portion 3112 is fixedly connected to the connecting portion 313, and the central portion 3111 faces away from the second magnet 24. Arched in the direction.
  • the folding ring 312 includes a first fixing portion 3121 fixed to the frame 10, a second fixing portion 3122 fixedly connected to the connecting portion 313, and a vibrating portion 3123 connecting the first fixing portion 3121 and the second fixing portion 3122.
  • the outer peripheral portion 3112 and the second fixing portion 3122 are both fixed on the side of the connecting portion 313 away from the voice coil 24.
  • the sound emitting device 100 further includes a flexible circuit board 40 that electrically connects the voice coil 32 with an external circuit.
  • the flexible circuit board 40 includes a third fixing portion 41 fixed to the housing frame 10, and fixed to the voice coil 32 and the connecting portion.
  • the fourth fixing part 42 between 313 and the elastic arm 43 connecting the third fixing part 42 and the fourth fixing part 42 are arranged opposite to the elastic arm 43 and arched toward the direction away from the elastic arm 43.
  • the voice coil 32 is formed by winding a wire 321. From the first magnet 22 to the second magnet 24, the number of layers of the wire 321 is gradually reduced.
  • the surfaces of the first magnetic steel 22 and the second magnetic steel 24 increase the volume of the magnetic steel through the protrusions, and at the same time, the magnetic bowl 21 and the pole core 23 are provided with corresponding recesses at the position where the magnetic steel is connected.
  • the volume of the first magnetic steel 22 and the second magnetic steel 24 is increased in the same space, the magnetic force is increased, and the acoustic performance of the sounding device is improved.

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

Abstract

本申请涉及电声装置领域，具体涉及一种发声装置，该发声装置包括壳架、磁路系统和振动系统，磁路系统包括磁碗、第一磁钢、极芯以及第二磁钢，极芯包括与第一磁钢连接的下表面以及与第二磁钢连接的上表面，第一磁钢包括与磁碗连接的第一表面以及与下表面连接的第二表面，第二磁钢包括与上表面连接的第三表面以及与第三表面相对设置的第四表面，极芯的下表面设有第一凹陷部，上表面设有第二凹陷部，第一磁钢包括自第二表面朝向极芯凸出延伸的第一凸起部，第一凸起部收容贴合于第一凹陷部，第二磁钢包括自第三表面朝向上表面凸出延伸的第二凸起部，第二凸起部收容贴合于第二凹陷部。该发声装置增加了磁钢的体积，提升了磁力，改善了声学性能。

Description

一种发声装置 技术领域
本申请涉及电声装置技术领域，具体涉及一种发声装置。
 背景技术
近年来，随着移动通信技术的快速发展，消费者越来越多地使用带有语音功能的移动通讯设备，而耳机也成为了人们日常活动和工作中必不可少的视听设备之一，人们不但要求其外观小巧精细，佩戴方便，更加要求其音质好，有立体感。因此，对进一步提高耳机的性能及内部结构的更加合理设计成了当下值得研究的课题。
现有技术中的耳机芯一般使用圆柱型的磁钢，磁钢体积小，磁力低，影响振膜的震动，导致耳机的声学性能不佳。
因此，有必要提供一种新的技术方案以解决上述技术问题。
 技术问题
本申请提供一种发声装置，能够解决现有技术中发声装置的磁钢体积小，磁力低的问题。
 技术解决方案
本申请的技术方案如下：提供一种发声装置，包括具有收容空间的壳架、收容于所述壳架内的磁路系统和固定于所述壳架的振动系统，所述磁路系统包括固定于所述壳架的磁碗、固定于所述磁碗的第一磁钢、固定于所述第一磁钢远离所述磁碗一侧的极芯以及固定于所述极芯远离所述第一磁钢一侧的第二磁钢，所述极芯包括与所述第一磁钢固定连接的下表面以及与所述第二磁钢固定连接的上表面，所述第一磁钢包括与所述磁碗固定连接的第一表面以及与所述第一表面相对设置且与所述下表面固定连接的第二表面，所述第二磁钢包括与所述上表面固定连接的第三表面以及与所述第三表面相对设置的第四表面，所述极芯上设有自所述下表面朝向所述上表面凹陷形成的第一凹陷部以及自所述上表面朝向所述下表面凹陷形成的第二凹陷部，所述第一磁钢包括自所述第二表面朝向极芯凸出延伸的第一凸起部，所述第一凸起部收容贴合于所述第一凹陷部，所述第二磁钢包括自所述第三表面朝向所述上表面凸出延伸的第二凸起部，所述第二凸起部收容贴合于所述第二凹陷部。
优选地，所述磁碗包括用于固定所述第一磁钢的底壁，所述底壁与所述第一磁钢固定连接的一侧设有向远离所述第一磁钢方向凹陷形成的第三凹陷部，所述第一磁钢还包括自所述第一表面朝向所述底壁凸出延伸的第三凸起部，所述第三凸起部收容贴合于所述第三凹陷部。
优选地，所述第一凸起部和所述第三凸起部呈锥型。
优选地，所述第二磁钢还包括自所述第四表面向远离所述第四表面的一侧凸出延伸的第四凸起部。
优选地，所述第二凸起部和所述第四凸起部呈锥型。
优选地，所述磁碗还包括自自所述底壁边缘弯折延伸的侧壁，所述侧壁固定于所述壳架。
优选地，所述振动系统包括固定于所述壳架上的振膜以及固定于所述振膜并用于驱动所述振膜振动的音圈，所述振膜包括位于中间位置的球顶、固定于所述壳架上且环绕所述球顶的折环以及连接所述折环与所述球顶的连接部，所述音圈固定于所述连接部，所述球顶包括位于中间位置的中心部以及环绕所述中心部的外周部，所述外周部与所述连接部固定连接，所述中心部朝向远离所述第二磁钢的方向拱起。
优选地，所述折环包括固定于所述壳架上的第一固定部、与所述连接部固定连接的第二固定部以及连接所述第一固定部和所述第二固定部的振动部，所述发声装置还包括将所述音圈与外部电路电连接的柔性电路板，所述柔性电路板包括固定于所述壳架的第三固定部、固定于所述音圈与所连接部之间的第四固定部以及连接所述第三固定部和所述第四固定部的弹性臂，所述振动部与所述弹性臂相对设置且朝向远离所述弹性臂方向拱起。
优选地，所述外周部和所述第二固定部均固定于所述连接部远离所述音圈的一侧。
优选地，自所述第一磁钢至所述第二磁钢的方向上，所述音圈由导线缠绕而成，自所述第一磁钢至所述第二磁钢的方向上，所述导线缠绕的层数逐渐减少。
 有益效果
本申请的有益效果在于：第一磁钢和第二磁钢的表面通过凸起部增加磁钢的体积，同时，磁碗和极芯在与磁钢连接的位置设置相应的凹陷部以收容凸起部，与传统的发声装置相比，在同等空间下，增加了第一磁钢和第二磁钢的体积，提升了磁力，改善了发声装置的声学性能。
 附图说明
图1为本申请实施例的发声装置的立体结构示意图；
图2为本申请实施例的发声装置的分解结构示意图；
图3为图1中沿A-A线的剖视图；
图4为图3中B区域的放大结构示意图；
图5为本申请实施例的音圈的结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请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申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，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他实施例，都属于本申请保护的范围。
本申请中的术语“第一”、“第二”、“第三”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。由此，限定有“第一”、“第二”、“第三”的特征可以明示或者隐含地包括至少一个该特征。本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。本申请实施例中所有方向性指示（诸如上、下、左、右、前、后……）仅用于解释在某一特定姿态（如附图所示）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。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
图1是本申请实施例的发声装置的立体结构示意图，图2是本申请实施例的发声装置的分解结构示意图，如图1和图2所示，该发声装置100包括设有收容空间11的壳架10、收容于收容空间11内的磁路系统20和固定于壳架10上的振动系统30。
进一步地，磁路系统20包括固定于壳架10的磁碗21、固定于磁碗21的第一磁钢22、固定于第一磁钢22远离磁碗21一侧的极芯23以及固定于极芯23远离第一磁钢22一侧的第二磁钢24。第一磁钢22和第二磁钢24的中心轴线均与极芯23的中心轴线重合，第一磁钢22的充磁方向与第二磁钢24的充磁方向相反。
请参见图2和图3，极芯23包括与第一磁钢22固定连接的下表面232和与第二磁钢24固定连接的上表面231；极芯23上设有自下表面232朝向上表面231凹陷形成的第一凹陷部233以及自上表面231朝向下表面232凹陷形成的第二凹陷部234。
磁碗21包括用于固定第一磁钢22的底壁211和围设于底壁211周侧的侧壁212，侧壁212和第一磁钢22之间形成有磁间隙213，底壁211与第一磁钢22固定连接的一侧设有向远离第一磁钢22方向凹陷形成的第三凹陷部214。本实施例的磁碗21为圆形，磁碗21的形状可以根据第一磁钢22的形状做相适应的调整。
第一磁钢22包括与磁碗21固定连接的第一表面221、与第一表面221相对设置且与下表面232固定连接的第二表面222、自第二表面222朝向极芯23凸出延伸的第一凸起部223以及自第一表面221朝向底壁211凸出延伸的第三凸起部224，第一凸起部223收容贴合于第一凹陷部233，第三凸起部224收容贴合于第三凹陷部214。本实施例的第一凸起部223和第三凸起部224呈锥型，相对应的第一凹陷部233和第三凹陷部214呈倒锥型，锥角的角度可以根据实际需要做调整。与传统的圆柱型磁钢相比，在同等空间下，该设置方式增加了第一磁钢22的体积，提升了磁力，改善了发声装置的声学性能。
第二磁钢24包括与上表面231固定连接的第三表面241、与第三表面241相对设置的第四表面242、自第三表面241朝向上表面231凸出延伸的第二凸起部243以及自第四表面242向远离第四表面242的一侧凸出延伸的第四凸起部244，第二凸起部243收容贴合于第二凹陷部234。本实施例的第二凸起部243和第四凸起部244呈锥型，相对应的第二凹陷部234呈倒锥型，锥角的角度可以根据实际需要做调整。与传统的圆柱型磁钢相比，在同等空间下，增加了第二磁钢24的体积，提升了磁力，改善了发声装置的声学性能。
请参见图2，振动系统30包括固定于壳架10上的振膜31以及设于磁间隙213内用于驱动振膜31振动的音圈32。进一步地，请参见图2至图4，振膜31包括位于中间位置的球顶311、固定于壳架10上且环绕球顶311的折环312以及连接折环312和球顶311的连接部313，音圈32固定于连接部313。更进一步地，请参见图4，球顶311包括位于中间位置的中心部3111以及环绕中心部3111的外周部3112，外周部3112与连接部313固定连接，中心部3111朝向远离第二磁钢24的方向拱起。折环312包括固定于壳架10上的第一固定部3121、与连接部313固定连接的第二固定部3122以及连接第一固定部3121和第二固定部3122的振动部3123。其中，外周部3112和第二固定部3122均固定于连接部313远离音圈24的一侧。
请参见图2，发声装置100还包括将音圈32与外部电路电连接的柔性电路板40，柔性电路板40包括固定于壳架10的第三固定部41、固定于音圈32与连接部313之间的第四固定部42以及连接第三固定部42和第四固定部42的弹性臂43，振动部3123与弹性臂43相对设置且朝向远离弹性臂43方向拱起。
请参见图5，音圈32由导线321缠绕而成，自第一磁钢22至第二磁钢24的方向上，导线321缠绕的层数逐渐减少。
本申请的发声装置中，第一磁钢22和第二磁钢24的表面通过凸起部增加磁钢的体积，同时，磁碗21和极芯23在与磁钢连接的位置设置相应的凹陷部以收容凸起部，与传统的发声装置相比，在同等空间下，增加了第一磁钢22和第二磁钢24的体积，提升了磁力，改善了发声装置的声学性能。
以上所述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、一种发声装置，包括具有收容空间的壳架、收容于所述壳架内的磁路系统和固定于所述壳架的振动系统，其特征在于，所述磁路系统包括固定于所述壳架的磁碗、固定于所述磁碗的第一磁钢、固定于所述第一磁钢远离所述磁碗一侧的极芯以及固定于所述极芯远离所述第一磁钢一侧的第二磁钢，所述极芯包括与所述第一磁钢固定连接的下表面以及与所述第二磁钢固定连接的上表面，所述第一磁钢包括与所述磁碗固定连接的第一表面以及与所述第一表面相对设置且与所述下表面固定连接的第二表面，所述第二磁钢包括与所述上表面固定连接的第三表面以及与所述第三表面相对设置的第四表面，所述极芯上设有自所述下表面朝向所述上表面凹陷形成的第一凹陷部以及自所述上表面朝向所述下表面凹陷形成的第二凹陷部，所述第一磁钢包括自所述第二表面朝向极芯凸出延伸的第一凸起部，所述第一凸起部收容贴合于所述第一凹陷部，所述第二磁钢包括自所述第三表面朝向所述上表面凸出延伸的第二凸起部，所述第二凸起部收容贴合于所述第二凹陷部。
2、根据权利要求1所述的发声装置，其特征在于，所述磁碗包括用于固定所述第一磁钢的底壁，所述底壁与所述第一磁钢固定连接的一侧设有向远离所述第一磁钢方向凹陷形成的第三凹陷部，所述第一磁钢还包括自所述第一表面朝向所述底壁凸出延伸的第三凸起部，所述第三凸起部收容贴合于所述第三凹陷部。
3、根据权利要求2所述的发声装置，其特征在于，所述第一凸起部和所述第三凸起部呈锥型。
4、根据权利要求1所述的发声装置，其特征在于，所述第二磁钢还包括自所述第四表面向远离所述第四表面的一侧凸出延伸的第四凸起部。
5、根据权利要求4所述的发声装置，其特征在于，所述第二凸起部和所述第四凸起部呈锥型。
6、根据权利要求2所述的发声装置，其特征在于，所述磁碗还包括自自所述底壁边缘弯折延伸的侧壁，所述侧壁固定于所述壳架。
7、根据权利要求6所述的发声装置，其特征在于，所述振动系统包括固定于所述壳架上的振膜以及固定于所述振膜并用于驱动所述振膜振动的音圈，所述振膜包括位于中间位置的球顶、固定于所述壳架上且环绕所述球顶的折环以及连接所述折环与所述球顶的连接部，所述音圈固定于所述连接部，所述球顶包括位于中间位置的中心部以及环绕所述中心部的外周部，所述外周部与所述连接部固定连接，所述中心部朝向远离所述第二磁钢的方向拱起。
8、根据权利要求7所述的发声装置，其特征在于，所述折环包括固定于所述壳架上的第一固定部、与所述连接部固定连接的第二固定部以及连接所述第一固定部和所述第二固定部的振动部，所述发声装置还包括将所述音圈与外部电路电连接的柔性电路板，所述柔性电路板包括固定于所述壳架的第三固定部、固定于所述音圈与所述连接部之间的第四固定部以及连接所述第三固定部和所述第四固定部的弹性臂，所述振动部与所述弹性臂相对设置且朝向远离所述弹性臂方向拱起。
9、根据权利要求7所述的发声装置，其特征在于，所述外周部和所述第二固定部均固定于所述连接部远离所述音圈的一侧。
10、根据权利要求9所述的发声装置，其特征在于，所述音圈由导线缠绕而成，自所述第一磁钢至所述第二磁钢的方向上，所述导线缠绕的层数逐渐减少。
PCT/CN2020/096740 2020-06-10 2020-06-18 一种发声装置 WO2021248533A1 (zh)

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