WO2021232474A1 - 一种发声器件 - Google Patents

一种发声器件 Download PDF

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Publication number
WO2021232474A1
WO2021232474A1 PCT/CN2020/093117 CN2020093117W WO2021232474A1 WO 2021232474 A1 WO2021232474 A1 WO 2021232474A1 CN 2020093117 W CN2020093117 W CN 2020093117W WO 2021232474 A1 WO2021232474 A1 WO 2021232474A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
sound
circuit system
magnetic circuit
bottom wall
Prior art date
Application number
PCT/CN2020/093117
Other languages
English (en)
French (fr)
Inventor
肖波
令狐荣林
章统
孔晨亮
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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Publication date
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 WO2021232474A1 publication Critical patent/WO2021232474A1/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
    • H04R9/02—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
    • 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

  • This application relates to the field of electro-acoustic conversion, and in particular to a sound-producing device.
  • a loudspeaker will provide a uniform magnetic field through a magnetic steel, so that the voice coil passing the alternating current vibrates in the uniform magnetic field, and the voice coil drives the first diaphragm to vibrate to make the loudspeaker produce sound.
  • the sound film fold ring of the prior art sound device vibrates sharply or has a large stroke, and the cloth edge fold ring is prone to nonlinear vibration, resulting in harmonic distortion (THD), which is extremely A large extent affects the performance of the sound generating device.
  • TDD harmonic distortion
  • the purpose of the present application is to provide a sound emitting device, which includes a first upper sound film formed by two-shot injection molding of two plastics to solve the above-mentioned problems.
  • the present application provides a sound emitting device, the sound emitting device includes a basin frame with a receiving space, a magnetic circuit system and a vibration system arranged in the receiving space,
  • the magnetic circuit system is arranged in the center of the accommodating space, and the vibration system includes a first diaphragm that is fixed to the basin frame and the magnetic circuit system and used for vibrating and sounding, and the first diaphragm includes and The first upper sound film connected to the magnetic circuit system, the first upper sound film folded ring portion, and the folded ring portion includes at least two connected folded rings, wherein the Young's modulus of at least one of the folded rings and the remaining The Young's modulus of other fold rings is different, and the fold ring portion is formed by two-shot injection molding.
  • the protrusion directions of two adjacent folding rings are the same or different.
  • the first upper sound film further includes a first fixing portion extending from the inner periphery of the folding ring portion to the magnetic circuit system, and a first fixing portion extending away from the magnetic circuit system from the outer periphery of the folding ring portion An extended second fixing part, the first fixing part is connected with the magnetic circuit system.
  • the height of the first fixing portion in the vibration direction is greater than the height of the second fixing portion in the vibration direction.
  • the first diaphragm further includes a second upper sound diaphragm connected to the basin frame and arranged around the first upper sound diaphragm at intervals, and a second upper sound diaphragm arranged on the first upper sound diaphragm and the second upper sound diaphragm.
  • the dome between the sound membranes; the dome is connected to the second fixing part.
  • the basin frame includes a bottom wall and an outer wall bent from the edge of the bottom wall toward the first diaphragm, the outer wall and the bottom wall surround the receiving space, and the second upper The sound membrane is connected with the outer wall on the side away from the bottom wall.
  • the magnetic circuit system includes a lower splint arranged in the center of the bottom wall, a main magnetic steel component arranged on the lower splint, a secondary magnetic steel component arranged around the main magnetic steel component, and the
  • the lower splint is arranged oppositely and is arranged on the upper splint on the side of the main magnetic steel component away from the bottom wall, a magnetic gap is provided between the main magnetic steel component and the auxiliary magnetic steel component, and the first upper sound The film is sandwiched between the upper clamping plate and the magnetic circuit system.
  • the vibration system further includes a voice coil arranged in the magnetic gap and a skeleton sleeved outside the auxiliary magnetic steel component and in contact with the voice coil, and the skeleton is a distance away from the bottom wall.
  • the side is connected with the first diaphragm.
  • the vibration system further includes a second diaphragm connected to the side of the basin frame and the frame close to the bottom wall, and the second diaphragm is spaced from the first diaphragm, so
  • the second diaphragm includes a lower sound diaphragm, and the lower sound diaphragm includes a folding ring recessed toward the bottom wall.
  • the vibration system further includes a flexible circuit board sandwiched between the second diaphragm and the frame, and the flexible circuit board is electrically connected to the voice coil.
  • a sound generating device comprising: a basin frame with a receiving space, a magnetic circuit system and a vibration system arranged in the receiving space, and the magnetic circuit system is arranged in the receiving space.
  • the vibration system includes a first diaphragm fixed to the basin frame and the magnetic circuit system and used for vibrating and sounding, and the first diaphragm includes a first upper sound diaphragm connected to the magnetic circuit system ,
  • the first upper sound film is formed by two-shot injection molding of the folding ring with different Young's modulus, which can ensure the boundary strength of the first upper sound film and adjust the shape of the folding ring more conveniently, so as to meet the requirements of the folding ring stroke. It can also adjust the performance of the single F0 and THD of the sound device more flexible, and can form a sound film with a small ring width for large amplitude (above 1mm).
  • FIG. 1 is a schematic diagram of the overall 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 emitting device according to an embodiment of the application
  • FIG. 3 is a schematic diagram of the structure of the first upper sound film in the sound generating device of FIG. 2;
  • Fig. 4 is a cross-sectional view of the sound emitting device of Fig. 1 along the A-A direction;
  • Fig. 5 is a top view of the cooperation of the voice coil, the bobbin and the magnetic circuit system of Fig. 2.
  • Sounding device 100 Basin 1; Bottom wall 11; Concession portion 111; Outer wall 12; First outer wall 121; Second outer wall 122; Third outer wall 123; Magnetic circuit system 2; Lower splint 21; Main magnet Steel component 22; main magnetic steel 221; main pole core 222; secondary magnetic steel component 23; secondary magnetic steel 231; secondary pole core 232; magnetic gap 24; upper splint 25; vibration system 3; first diaphragm 31; first Upper sound film 311; folding ring portion 3111; first folding ring a; second folding ring b; third folding ring c; first fixing portion 3112; second fixing portion 3113; second upper sound film 312; fourth folding Ring d; dome 313; plate-shaped body 3131; give way 3132; voice coil 32; skeleton 33; skeleton body 331; fixed support 332; second diaphragm 34; fifth folding ring e;
  • FIGS. 1-2 show a schematic diagram of the overall and exploded structure of the sound generating device 100 according to an embodiment of the present application.
  • the sound generating device 100 includes a basin frame 1 with a containing space, a magnetic circuit system 2 and a vibration system 3 arranged in the containing space, the basin frame 1 is used to fix the magnetic circuit system 2 and the vibration system 3, and the magnetic circuit system 2 is used to drive vibration System 3 vibrates and produces sound.
  • the basin frame 1 includes a bottom wall 11 and an outer wall 12 bent from the edge of the bottom wall 11 toward the first diaphragm 31.
  • the outer wall 12 and the bottom wall 11 enclose a receiving space.
  • the outer wall 12 includes a first outer wall 121 bent from the edge of the bottom wall 11 toward the first diaphragm 31, and a first outer wall 121 bent and extended from an end of the first outer wall 121 away from the bottom wall 11 toward a distance away from the receiving space.
  • the second outer wall 122 extends from an end of the second outer wall 122 away from the first outer wall 121 toward the third outer wall 123 bent toward the first diaphragm 31.
  • the magnetic circuit system 2 is set in the center of the containing space, abutting against the bottom wall 11, including a lower splint 21 arranged in the center of the bottom wall 11, and a lower splint 21 arranged on the lower splint 21
  • a relief portion 111 is provided in the center of the bottom wall 11, and the lower clamping plate 21 is a flat plate embedded in the relief portion 111.
  • the main magnet assembly 22 includes two main magnets 221 and a main pole core 222 sandwiched between the two main magnets 221.
  • One of the main magnets 221 is fixedly connected to the lower clamping plate 21, and the main magnet 221 is a permanent magnet. , To provide a uniform magnetic field.
  • the secondary magnetic steel component 23 may be an annular shape integrally formed around the main magnetic steel component 22, or it may be surrounded by 4 sets of secondary magnetic steel components 23 into a loop, or may be surrounded by two sets of secondary magnetic steel components 23. ring.
  • four sets of secondary magnetic steel components 23 are provided to surround the main magnetic steel component 22 at intervals to form a magnetic gap 24 between the secondary magnetic steel components 23 and the main magnetic steel component 22.
  • the sub-magnet assembly 23 includes two sub-magnets 231 and a sub-pole core 232 sandwiched between the two sub-magnets 231.
  • the magnetic circuit system 2 further includes an upper splint 25 fixed on the top of the main magnetic steel component 22 and the auxiliary magnetic steel component 23 (an end away from the lower splint 21), and the upper splint 25 is arranged opposite to the lower splint 21 , And abuts against the main magnet 221 at the end of the main magnet assembly 22 away from the bottom wall 11, and the upper clamping plate 25 can avoid the magnetic leakage of the magnetic circuit system 2.
  • the vibration system 3 is arranged around the magnetic circuit system 2 and is connected to the basin frame 1 and the magnetic circuit system 2 respectively.
  • the vibration system 3 includes a voice coil 32 arranged in the magnetic gap 24, a skeleton 33 sleeved on the auxiliary magnetic steel assembly 23 and abutted with the voice coil 32, fixed to the basin frame 1 and the magnetic circuit system 2 and used for vibrating and sounding
  • the first diaphragm 31 may be a complete sound diaphragm, or the sound diaphragm may cooperate with the dome.
  • the first diaphragm 31 includes a first upper sound diaphragm 311 connected to the magnetic circuit system 2, a second upper sound diaphragm 312 connected to the frame 1 and arranged around the first upper sound diaphragm 311 at intervals, and a device The dome 313 between the first upper sound film 311 and the second upper sound film 312.
  • the first upper sound film 311 includes a folding ring portion 3111 having at least two connected folding rings, a first fixing portion 3112 extending from the inner periphery of the folding ring portion 3111 to the magnetic circuit system 2 and an outer periphery of the self-folding ring portion 3111.
  • the second fixing part 3113 extending away from the magnetic circuit system 2.
  • the Young's modulus of at least one of the fold rings is different from the Young's modulus of the remaining fold rings, so that the first upper sound film 311 is two-shot injection molded from two materials with different Young's moduli.
  • the folding ring portion 3111 of this embodiment is described by taking three folding rings as an example. In actual application, it may also include the case where two folding rings or more than three folding rings are provided.
  • the folding ring portion 3111 includes a first folding ring a, a second folding ring b, and a third folding ring c that are sequentially connected, such as the Young's modulus of the second folding ring b and the first folding ring a and The Young's modulus of the third fold ring c is different.
  • the first fold ring a, the second fold ring b and the third fold ring c are formed by two-shot injection molding, so that the shape of each fold ring in the fold ring portion 3111 can be adjusted more conveniently.
  • the convex directions of two adjacent folding rings may be the same or different.
  • the convex direction of the first folding ring a, the convex direction of the second folding ring b, and the The convex direction of the third folding ring c is different.
  • the first fixing portion 3112 is formed by extending the first folding ring a toward the magnetic circuit system 2
  • the second fixing portion 3113 is formed by extending the third folding ring c away from the magnetic circuit system 2
  • the first fixing portion 3112 Both the second fixing part 3113 and the second fixing part 3113 are in a frame structure.
  • the first fixing part 3112 is connected to the top of the magnetic circuit system 2
  • the second fixing part 3113 is connected to the dome 313.
  • the height of the first fixing portion 3112 connected to the magnetic circuit system 2 of the first upper sound film 311 in the vibration direction is greater than the height of the second fixing portion 3113 connected to the dome 313 in the vibration direction.
  • the first fixing portion 3112 and the second fixing portion 3113 form a height difference in the vibration direction, and furthermore, while ensuring the same effective vibration area (SD) of the diaphragm, a first upper sound membrane 311 with a smaller folding ring width is formed. Effectively improving the space utilization rate inside the sound emitting device 100 can make the size of the sound emitting device 100 smaller, which is conducive to the development of miniaturization.
  • the dome 313 includes a plate-shaped main body 3131 and a relief port 3132 opened in the middle of the plate-shaped main body 3131, and the magnetic circuit system 2 is provided in the middle of the relief port 3132.
  • the plate-shaped main body 3131 is connected to the second fixing portion 3113 along the inner edge of the relief opening 3132, and the outer edge of the plate-shaped main body 3131 away from the relief opening 3132 is connected to the second upper sound film 312.
  • the second upper sound film 312 is connected to the third outer wall 123 and the dome 313 and surrounds the first upper sound film 311 at intervals.
  • the fourth folding ring d of the second upper sound film 312 protrudes away from the bottom wall 11.
  • the frame 33 includes a frame-shaped frame body 331 sleeved outside the secondary magnetic steel assembly 23, and an edge A fixed support portion 332 extending from the bottom of the frame main body 331 to the voice coil 32, and the fixed support portion 332 fixedly abuts against the voice coil 32.
  • the vibration system 3 further includes a second diaphragm 34 respectively connected to the outer wall 12 and the frame 33 on the side close to the bottom wall 11 .
  • the second diaphragm 34 may be a complete sound diaphragm, or the sound diaphragm may be matched with the dome.
  • the second diaphragm 34 includes a lower sound diaphragm. The lower sound diaphragm is spaced apart from the first diaphragm 31 along the vertical vibration direction. The lower sound diaphragm is close to the bottom wall 11 from the second outer wall 122 and the frame 33, respectively.
  • the connection includes a fifth folding ring e recessed toward the bottom wall 11.
  • the vibration system 3 further includes a flexible circuit board 35 sandwiched between the second diaphragm 34 and the frame 33, The circuit board is electrically connected to the voice coil 32.
  • the sound generation principle of the sound generating device 100 in the embodiment of the present application is: in the magnetic circuit system 2, the voice coil 32 passing an alternating current vibrates under the action of a uniform magnetic field, and drives the skeleton 33 connected to the voice coil 32 to vibrate, thereby driving The first diaphragm 31 vibrates and produces sound.
  • the first upper sound film 311 is formed by injection molding of two plastics with different Young's modulus ratios, which can ensure the boundary of the first upper sound film 311 (the first fixing portion 3112 and the second fixing portion 3113) At the same time of strength, it is more convenient to adjust the shape of each folding ring in the folding ring part 3111, which not only satisfies the folding ring stroke, but also can adjust the performance of the speaker unit F0 and THD more flexibly.
  • the first upper sound film 311 can realize that the folding ring width of the sound film is small and is applied to the sound generating device 100 with a large amplitude (above 1 mm).

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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)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

本申请提供了一种发声器件，包括：具有收容空间的盆架、设于所述收容空间内的磁路系统和振动系统，所述磁路系统设于所述收容空间的中央，所述振动系统包括固定于所述盆架和所述磁路系统且用于振动发声的第一振膜，所述第一振膜包括与所述磁路系统相连的第一上音膜，通过采用不同杨氏模量的折环双射注塑形成第一上音膜，能够在保证第一上音膜边界强度的同时，更加方便的调节折环形状，以实现既满足折环行程，又能调节发声器件的单体F0、THD性能也更加灵活，能够形成应用于大振幅（1mm以上）折环宽度较小的音膜。

Description

一种发声器件 技术领域
本申请涉及电声转换领域，尤其涉及一种发声器件。
 背景技术
随着科技的发展，越来越多的电子设备都内置有发声器件。一般的，扬声器会通过磁钢提供匀强磁场，使通有交变电流的音圈在匀强磁场中振动，音圈带动第一振膜振动而使扬声器产生声音。
在大振幅（1mm以上）振动的情况下，现有技术的发声器件的音膜折环振动幅度剧烈或者行程较大，布边折环容易出现非线性振动，产生谐波失真（THD），极大程度影响发声器件的性能。
因此，有必要提供一种发声器件来改善上述问题。
 技术问题
本申请的目的在于提供一种发声器件，该发声器件包括具有两种塑料双射注塑成型的第一上音膜用以解决上述问题。
 技术解决方案
本申请的技术方案如下：本申请提供了一种发声器件，所述发声器件包括具有收容空间的盆架、设于所述收容空间内的磁路系统和振动系统，
所述磁路系统设于所述收容空间的中央，所述振动系统包括固定于所述盆架和所述磁路系统且用于振动发声的第一振膜，所述第一振膜包括与所述磁路系统相连的第一上音膜，所述第一上音膜折环部，所述折环部包括至少两个相连的折环，其中至少一个折环的杨氏模量与剩余其他折环的杨氏模量不同，所述折环部由双射注塑形成。
优选的，相邻两个折环的凸起方向相同或者不同。
优选的，所述第一上音膜还包括自所述折环部的内周缘向所述磁路系统延伸的第一固定部以及自所述折环部的外周缘向背离所述磁路系统延伸的第二固定部，所述第一固定部与所述磁路系统相连。
优选的，所述第一固定部在振动方向上的高度大于所述第二固定部在振动方向上的高度。
优选的，所述第一振膜还包括与所述盆架相连且间隔环绕所述第一上音膜设置的第二上音膜以及设于所述第一上音膜和所述第二上音膜之间的球顶；所述球顶与所述第二固定部相连。
优选的，所述盆架包括底壁以及自所述底壁边缘朝向所述第一振膜弯折的外壁，所述外壁和所述底壁围设形成所述收容空间，所述第二上音膜与所述外壁远离所述底壁一侧相连。
优选的，所述磁路系统包括设于所述底壁中央的下夹板、设于所述下夹板上的主磁钢组件、环绕所述主磁钢组件设置的副磁钢组件以及与所述下夹板相对设置且设于所述主磁钢组件远离所述底壁一侧的上夹板，所述主磁钢组件和所述副磁钢组件之间设有磁间隙，所述第一上音膜夹设于所述上夹板和所述磁路系统之间。
优选的，所述振动系统还包括设于所述磁间隙内的音圈以及套设于所述副磁钢组件外且与所述音圈抵接的骨架，所述骨架远离所述底壁一侧与所述第一振膜相连。
优选的，所述振动系统还包括分别与所述盆架和所述骨架靠近所述底壁一侧相连的第二振膜，所述第二振膜与所述第一振膜间隔设置，所述第二振膜包括下音膜，所述下音膜包括朝向所述底壁凹陷的折环。
优选的，所述振动系统还包括夹设于所述第二振膜和所述骨架之间的柔性电路板，所述柔性电路板与所述音圈电连接。
 有益效果
本申请的有益效果在于：提供了一种发声器件，包括：具有收容空间的盆架、设于所述收容空间内的磁路系统和振动系统，所述磁路系统设于所述收容空间的中央，所述振动系统包括固定于所述盆架和所述磁路系统且用于振动发声的第一振膜，所述第一振膜包括与所述磁路系统相连的第一上音膜，通过采用不同杨氏模量的折环双射注塑形成第一上音膜，能够在保证第一上音膜边界强度的同时，更加方便的调节折环形状，以实现既满足折环行程，又能调节发声器件的单体F0、THD性能也更加灵活，能够形成应用于大振幅（1mm以上）折环宽度较小的音膜。
 附图说明
图1为本申请实施例的发声器件的整体结构示意图；
图2为本申请实施例的发声器件的爆炸结构示意图；
图3为图2的发声器件中第一上音膜结构示意图；
图4为图1的发声器件沿A-A向的剖视图；
图5为图2的音圈、骨架和磁路系统配合的俯视图。
附图说明：发声器件100；盆架1；底壁11；让位部111；外壁12；第一外壁121；第二外壁122；第三外壁123；磁路系统2；下夹板21；主磁钢组件22；主磁钢221；主极芯222；副磁钢组件23；副磁钢231；副极芯232；磁间隙24；上夹板25；振动系统3；第一振膜31；第一上音膜311；折环部3111；第一折环a；第二折环b；第三折环c；第一固定部3112；第二固定部3113；第二上音膜312；第四折环d；球顶313；板状主体3131；让位口3132；音圈32；骨架33；骨架主体331；固定支撑部332；第二振膜34；第五折环e；柔性电路板35。
 本发明的实施方式
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1-2，展示了本申请实施例的发声器件100的整体和爆炸结构示意图。发声器件100包括具有收容空间的盆架1，设于收容空间内的磁路系统2和振动系统3，盆架1用于固定磁路系统2和振动系统3，磁路系统2用于驱动振动系统3振动发声。
请参阅图1、图2和图4，盆架1包括底壁11以及自底壁11边缘朝向第一振膜31弯折的外壁12，外壁12和底壁11围设形成收容空间。在一个可选的实施方式中，外壁12包括自底壁11边缘朝向第一振膜31弯折的第一外壁121、自第一外壁121远离底壁11的一端朝向远离收容空间弯折延伸的第二外壁122，自第二外壁122远离第一外壁121的一端朝向第一振膜31弯折的第三外壁123。
请参阅图1、图2、图4和图5，磁路系统2设于收容空间的中央，与底壁11相抵接，包括设于底壁11中央的下夹板21、设于下夹板21上的主磁钢组件22和环绕主磁钢组件22设置的副磁钢组件23，主磁钢组件22和副磁钢组件23之间形成有磁间隙24。其中，底壁11的中央设有让位部111，下夹板21为嵌设于让位部111的平板。且当下夹板21固持于底壁11后，主磁钢组件22和副磁钢组件23贴设于下夹板21，副磁钢组件23环绕环绕主磁钢组件22设置并与副磁钢组件23之间形成磁间隙24。主磁钢组件22包括两个主磁钢221和夹设于两个主磁钢221之间的主极芯222，其中一个主磁钢221与下夹板21固定连接，主磁钢221为永磁体，用以提供匀强磁场。可选的，副磁钢组件23可以为环绕主磁钢组件22一体成型的环状，也可以为4组副磁钢组件23围合成环状，也可以为2组副磁钢组件23围合成环状。在本申请实施例中，设有四组副磁钢组件23间隔环绕主磁钢组件22周围，以在副磁钢组件23和主磁钢组件22之间形成磁间隙24。副磁钢组件23包括两个副磁钢231和夹设于两个副磁钢231之间的副极芯232。通过设置副磁钢组件23，可以调整发声器件100的磁场分布，使磁间隙24各位置的磁场强度相对一致，来提升发声器件100的音质。在一个可选的实施方式中，磁路系统2还包括固持于主磁钢组件22和副磁钢组件23顶部（远离下夹板21一端）的上夹板25，上夹板25与下夹板21相对设置，且与主磁钢组件22远离底壁11一端的主磁钢221相抵接，通过设置上夹板25能够避免磁路系统2的磁泄露。
请参阅图2-图5，振动系统3环绕磁路系统2设置，与盆架1和磁路系统2分别相连。振动系统3包括设于磁间隙24内的音圈32、套设于副磁钢组件23外且与音圈32抵接的骨架33、固定于盆架1和磁路系统2且用于振动发声的第一振膜31。可选的，第一振膜31可以是一个完整的音膜，也可以为音膜与球顶配合。在本实施例中，第一振膜31包括与磁路系统2相连的第一上音膜311、与盆架1相连且间隔环绕第一上音膜311设置的第二上音膜312以及设于第一上音膜311和第二上音膜312之间的球顶313。
第一上音膜311包括具有至少两个相连折环的折环部3111、自折环部3111的内周缘向磁路系统2延伸的第一固定部3112和自折环部3111的外周缘向背离磁路系统2延伸的第二固定部3113。其中至少一个折环的杨氏模量与剩余其他折环的杨氏模量不同，以使得第一上音膜311采用两种不同杨氏模量的材料双射注塑而成。本实施例的折环部3111以具有3个折环为例进行说明，实际应用时还可以包括设置2个折环或者多于3个折环的情形。在本实施例中，折环部3111包括依次相连的第一折环a、第二折环b和第三折环c，例如第二折环b的杨氏模量与第一折环a和第三折环c的杨氏模量不同，第一折环a、第二折环b和第三折环c通过双射注塑成型，能够更加方便的调节折环部3111内各折环形状。在一个可选的实施方式中，相邻两个折环的凸起方向可以相同也可以不同，例如本实施例中第一折环a的凸起方向、第二折环b的凸起方向和第三折环c的凸起方向不同。在本实施例中，第一固定部3112由第一折环a向磁路系统2延伸形成，第二固定部3113由第三折环c向背离磁路系统2延伸形成，第一固定部3112和第二固定部3113均呈框形结构，第一固定部3112与磁路系统2的顶部相连，第二固定部3113与球顶313相连。优选的，本实施例中第一上音膜311与磁路系统2相连的第一固定部3112在振动方向上的高度大于与球顶313相连的第二固定部3113在振动方向上的高度，使得第一固定部3112和第二固定部3113在振动方向上形成高度差，进而在保证振膜有效振动面积（SD）相同的情况下，形成折环宽度较小的第一上音膜311，有效地提高发声器件100内部的空间利用率，可使发声器件100尺寸更小，有利于微型化发展。
球顶313包括板状主体3131以及开设于板状主体3131中间的让位口3132，磁路系统2设于让位口3132中间。板状主体3131沿让位口3132的内边缘与第二固定部3113相连，板状主体3131远离让位口3132的外边缘与第二上音膜312相连。第二上音膜312与第三外壁123和球顶313相连，间隔环绕第一上音膜311外，第二上音膜312的第四折环d向远离底壁11方向凸出。
在以上实施例的基础上，在一个可选的实施方式中，请参阅图2、图4和图5，骨架33包括套设于副磁钢组件23外且呈框状的骨架主体331以及沿骨架主体331底部向音圈32延伸的固定支撑部332，固定支撑部332与音圈32固定抵接。在本实施例中，固定支撑部332设有四个，从骨架主体331的四个框角向音圈32延伸，固定抵接音圈32。
在以上实施例的基础上，在一个可选的实施方式中，请参阅图2和图4，振动系统3还包括与外壁12和骨架33靠近底壁11一侧分别连接的第二振膜34。可选的，第二振膜34可以是一个完整的音膜，也可以为音膜与球顶配合。在本实施例中，第二振膜34包括下音膜，下音膜与第一振膜31沿垂直振动方向间隔设置，下音膜分别与第二外壁122和骨架33靠近底壁11一侧相连，包括向靠近底壁11方向凹陷的第五折环e。
在以上实施例的基础上，在一个可选的实施方式中，请参阅图2和图4，振动系统3还包括夹设于第二振膜34和骨架33之间的柔性电路板35，柔性电路板与音圈32电连接。
本申请实施例的发声器件100发声原理为:在磁路系统2中，通以交变电流的音圈32在匀强磁场的作用中振动，驱动与音圈32相连的骨架33振动，进而带动第一振膜31振动发声。本申请实施例通过采用不同杨氏模量配比的两种塑料进行注塑形成第一上音膜311，能够在保证第一上音膜311边界（第一固定部3112和第二固定部3113）强度的同时，更加方便的调节折环部3111内各折环形状，既满足折环行程，又能调节扬声器单体F0、THD性能也更加灵活。第一上音膜311能够实现音膜的折环宽度较小且应用于大振幅（1mm以上）的发声器件100。
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、一种发声器件，其特征在于，所述发声器件包括具有收容空间的盆架、设于所述收容空间内的磁路系统和振动系统，
所述磁路系统设于所述收容空间的中央，所述振动系统包括固定于所述盆架和所述磁路系统且用于振动发声的第一振膜，所述第一振膜包括与所述磁路系统相连的第一上音膜，所述第一上音膜包括折环部，所述折环部包括至少两个相连的折环，其中至少一个折环的杨氏模量与剩余其他折环的杨氏模量不同，所述第一上音膜由双射注塑形成。
2、根据权利要求1所述的发声器件，其特征在于，相邻两个折环的凸起方向相同或者不同。
3、根据权利要求1或2所述的发声器件，其特征在于，所述第一上音膜还包括自所述折环部的内周缘所述磁路系统延伸的第一固定部以及自所述折环部的外周缘向背离所述磁路系统延伸的第二固定部，所述第一固定部与所述磁路系统相连。
4、根据权利要求3所述的发声器件，其特征在于，所述第一固定部在振动方向上的高度大于所述第二固定部在振动方向上的高度。
5、根据权利要求4所述的发声器件，其特征在于，所述第一振膜还包括与所述盆架相连且间隔环绕所述第一上音膜设置的第二上音膜以及设于所述第一上音膜和所述第二上音膜之间的球顶；所述球顶与所述第二固定部相连。
6、根据权利要求5所述的发声器件，其特征在于，所述盆架包括底壁以及自所述底壁边缘朝向所述第一振膜弯折的外壁，所述外壁和所述底壁围设形成所述收容空间，所述第二上音膜与所述外壁远离所述底壁一侧相连。
7、根据权利要求6所述的发声器件，其特征在于，所述磁路系统包括设于所述底壁中央的下夹板、设于所述下夹板上的主磁钢组件、环绕所述主磁钢组件设置的副磁钢组件以及与所述下夹板相对设置且设于所述主磁钢组件远离所述底壁一侧的上夹板，所述主磁钢组件和所述副磁钢组件之间设有磁间隙，所述第一上音膜夹设于所述上夹板和所述磁路系统之间。
8、根据权利要求7所述的发声器件，其特征在于，所述振动系统还包括设于所述磁间隙内的音圈以及套设于所述副磁钢组件外且与所述音圈抵接的骨架，所述骨架远离所述底壁一侧与所述第一振膜相连。
9、根据权利要求8所述的发声器件，其特征在于，所述振动系统还包括分别与所述盆架和所述骨架靠近所述底壁一侧相连的第二振膜，所述第二振膜与所述第一振膜沿振动方向间隔设置，所述第二振膜包括下音膜，所述下音膜包括朝向所述底壁凹陷的折环。
10、根据权利要求9所述的发声器件，其特征在于，所述振动系统还包括夹设于所述第二振膜和所述骨架之间的柔性电路板，所述柔性电路板与所述音圈电连接。
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