WO2021258440A1 - 发声器件 - Google Patents

发声器件 Download PDF

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Publication number
WO2021258440A1
WO2021258440A1 PCT/CN2020/102772 CN2020102772W WO2021258440A1 WO 2021258440 A1 WO2021258440 A1 WO 2021258440A1 CN 2020102772 W CN2020102772 W CN 2020102772W WO 2021258440 A1 WO2021258440 A1 WO 2021258440A1
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WO
WIPO (PCT)
Prior art keywords
magnetic steel
yoke
magnetic
skeleton
voice coil
Prior art date
Application number
PCT/CN2020/102772
Other languages
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 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 WO2021258440A1 publication Critical patent/WO2021258440A1/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

  • the invention relates to the field of electro-acoustic conversion, in particular to a sound-producing device applied to electronic sound box products.
  • the sound device in the related art includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system with a magnetic gap;
  • the vibration system includes an upper diaphragm fixed to the basin frame, and The upper diaphragm is inserted in the magnetic gap to drive the voice coil to vibrate and produce sound, the lower diaphragm arranged opposite to the upper diaphragm, and the upper diaphragm and the lower diaphragm respectively.
  • the frame one end of the lower diaphragm is fixed to the frame, and the other end is fixed to the lower diaphragm of the voice coil at an end away from the diaphragm.
  • the lower diaphragm is fixed to the opposite ends of the voice coil.
  • the lower diaphragm can effectively prevent lateral oscillation of the voice coil when it vibrates, it is sandwiched
  • the small space between the basin frame and the voice coil results in a small vibration space of the lower diaphragm.
  • the vibration amplitude of the lower diaphragm is limited, making the lower diaphragm
  • the service life is short, and the stability of the voice coil is also poor, which makes the reliability of the sound generating device poor.
  • the purpose of the present invention is to provide a sound device with long service life and high reliability of the lower diaphragm.
  • the present invention provides a sound generating device, which includes a vibration system and a magnetic circuit system for driving the vibration system to vibrate and produce sound.
  • a voice coil that vibrates and produces sound a lower diaphragm arranged opposite to the upper diaphragm, and a skeleton arranged between the upper diaphragm and the lower diaphragm, and the magnetic circuit system includes
  • the yoke is arranged relatively spaced apart and the first magnetic steel is fixed to the yoke.
  • the yoke includes a yoke body and a yoke supported by the yoke body that protrudes and extends in the direction of the upper diaphragm A stand, the first magnetic steel is fixed to the yoke body, the voice coil is arranged around the outer side of the first magnetic steel, and the yoke support stand is arranged on the inner side of the first magnetic steel;
  • the skeleton includes a skeleton body connecting the upper diaphragm and the lower diaphragm and extending to the inner side of the first magnetic steel, and a skeleton extension part extending from the skeleton body in the direction of the voice coil; the lower The diaphragm is arranged on the inner side of the first magnetic steel and connected between the skeleton body and the yoke support; the first magnetic steel is provided with a fracture through it, and the skeleton extension passes through The fracture is fixed to the voice coil.
  • the magnetic circuit system further includes a second magnetic steel fixed to the yoke body, and the second magnetic steel is arranged on the outer side of the first magnetic steel and is spaced from the first magnetic steel to form a magnetic field. A gap, the voice coil is inserted in the magnetic gap.
  • the skeleton extension includes a skeleton extension body extending from the skeleton body in the direction of the voice coil, and a skeleton first fixing body extending from the skeleton extension body in the direction of the yoke.
  • the second fixed section of the frame is fixed to one end of the voice coil close to the yoke.
  • the yoke supporting table is rectangular
  • the first magnetic steel includes four
  • two of the first magnetic steels are arranged on opposite sides of the yoke supporting table at intervals
  • the other two A magnetic steel is arranged at intervals on the other opposite sides of the yoke support table
  • two adjacent first magnetic steels form the fracture at intervals
  • the skeleton extension includes four, and each of the skeletons extends The part passes through an adjacent said fracture.
  • the voice coil has a rectangular shape with rounded corners, and the four frame extensions are respectively connected to the four rounded corners of the voice coil.
  • the sound emitting device further includes a basin frame for supporting the vibration system and the magnetic circuit system respectively, the upper diaphragm, the basin frame, the skeleton body, the lower diaphragm and the
  • the magnetic circuit system jointly encloses a first inner acoustic cavity, the upper diaphragm, the skeleton body, the lower diaphragm, and the yoke support table jointly enclose a second inner acoustic cavity, and the skeleton body is provided with a through On the leakage hole, the second internal acoustic cavity communicates with the first internal acoustic cavity through the leakage hole.
  • the leakage hole includes a plurality of leakage holes, and the plurality of leakage holes are spaced apart from each other.
  • the lower diaphragm has a ring shape
  • the lower diaphragm includes a first lower fixing portion fixed to the yoke support table, and a lower fold extending from the outer periphery of the first lower fixing portion A ring portion and a second lower fixing portion extending from the outer periphery of the lower folding ring portion in the direction of the first magnetic steel, and the frame body is fixed to the second lower fixing portion.
  • the yoke support table includes a support platen opposite to the upper diaphragm and a side wall of the support table bent and extended from the outer periphery of the support plate to the yoke body, and the support table
  • the side wall is connected to the yoke body and forms a gap with the first magnetic steel.
  • the first lower fixing part is fixed to the support platen, and the lower folding ring part is close to the yoke body. The direction is recessed and accommodated in the gap.
  • the magnetic circuit system further includes a first clamping plate stacked on the first magnetic steel, a second clamping plate stacked on the second magnetic steel, and an auxiliary magnetic steel stacked on the second clamping plate
  • the second magnetic steel and the auxiliary magnetic steel are arranged opposite to each other with the same pole and the opposite magnetic pole of the same pole is opposite to the magnetic pole of the first magnetic steel on the side close to the first clamping plate.
  • the sound-generating device of the present invention sets the yoke of the magnetic circuit system with a yoke support stand protruding upward in the direction of the diaphragm, and by setting the yoke support stand on the inner side of the first magnetic steel, the voice coil surrounds It is arranged on the outside of the first magnetic steel, the first magnetic steel is provided with a fracture, and the skeleton body of the skeleton is connected to the upper diaphragm and the lower diaphragm and extends to the inner side of the first magnetic steel, and the skeleton extension part of the skeleton is penetrated Pass the fracture and fix it to the voice coil.
  • the lower diaphragm is arranged inside the first magnetic steel and connected between the frame body and the yoke support platform.
  • This structure makes the lower diaphragm accommodated in the space enclosed by the first magnetic steel Internally, compared to the space between the lower diaphragm set in the frame and the voice coil in the related art, the space enclosed by the lower diaphragm set in the first magnetic steel is relatively large, so that the lower diaphragm can be designed to be larger.
  • the vibration space of the diaphragm is large, so that the service life of the lower diaphragm is long, and the effect of preventing the lateral swing of the voice coil when vibrating is good, so that the sound generating device has good stability.
  • Fig. 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention
  • FIG. 2 is an exploded view of a part of the three-dimensional structure of the sound generating device of the present invention
  • Figure 3 is a sectional view taken along the line A-A in Figure 1;
  • FIG. 4 is a schematic diagram of the three-dimensional assembly structure of the sound generating device of the present invention with the magnetic yoke removed;
  • FIG. 5 is a schematic diagram of the three-dimensional assembly structure of the upper diaphragm, lower diaphragm, voice coil, and skeleton of the sound generating device of the present invention
  • FIG. 6 is a schematic diagram of the three-dimensional structure of the skeleton of the sound generating device of the present invention.
  • FIG. 7 is a schematic diagram of the three-dimensional structure of the magnetic yoke of the sound generating device of the present invention.
  • the present invention provides a sound generating device 100, which includes a vibration system 2 and a magnetic circuit system 3, and the magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.
  • the magnetic circuit system 3 specifically has a magnetic gap 30.
  • the sound generating device 100 further includes a basin frame 1 for supporting the vibration system 2 and the magnetic circuit system 3 respectively.
  • the vibration system 2 is fixed to the basin frame 1.
  • the vibration system 2 includes an upper diaphragm 21 fixed to the basin frame 1 for vibrating and sounding, a voice coil 22 inserted in the magnetic gap 30 to drive the upper diaphragm 21 to vibrate and sound,
  • a lower diaphragm 23 is arranged opposite to the upper diaphragm 21 and a skeleton 24 arranged between the upper diaphragm 21 and the lower diaphragm 23.
  • the upper diaphragm 21 includes an upper fixing portion 211 fixed to the basin frame 1, an upper folding ring portion 212 that is bent and extended from the periphery of the upper fixing portion 211 into a ring shape, and The upper ring portion 212 is bent and extended in the direction away from the upper fixing portion 211 and the upper vibrating portion 213 and the dome 214 attached and fixed to the upper vibrating portion 213, and the upper vibrating portion 213 is provided with penetrating through it.
  • the first through hole 210 of the dome 214 covers the first through hole 210.
  • the magnetic circuit system 3 includes a magnetic yoke 31 disposed opposite to the upper diaphragm 21, and a first magnetic steel 32 and a second magnetic steel 33 respectively fixed to the magnetic yoke 31.
  • the second magnetic steel 33 is spaced from the first magnetic steel 32 to form the magnetic gap 30.
  • the yoke 31 includes a yoke body 311 and a yoke support platform 312 formed by the yoke body 311 protruding and extending in the direction of the upper diaphragm 21.
  • the yoke support table 312 is located in the middle of the yoke body 311.
  • the first magnetic steel 32 and the second magnetic steel 33 are respectively fixed to the yoke body 311, and the second magnetic steel 33 is arranged on the outside of the first magnetic steel 32 and is connected to the first magnetic steel.
  • the steel 32 forms the magnetic gap 30 at intervals.
  • the first magnetic steel 32 has a ring shape.
  • the yoke support platform 312 is arranged inside the first magnetic steel 32.
  • This structure makes a space between the first magnetic steel 32 and the yoke support table 312, and on the other hand enables the first magnetic steel 32 to be enclosed in a ring structure, which is beneficial to increase the size of the The space of the magnetic gap 30 of the magnetic circuit system 3 improves the acoustic performance of the sound emitting device 100.
  • the frame 24 is fixed to the voice coil 22, the upper diaphragm 21 and the lower diaphragm 23, respectively.
  • the skeleton 24 includes a skeleton body 241 that connects the upper diaphragm 21 and the lower diaphragm 23 and extends to the inner side of the first magnetic steel 32, and is connected to the voice coil 22 from the skeleton body 241.
  • the frame extending in the direction of-extension 242.
  • One end of the frame body 241 is fixed to the upper diaphragm 21, and the other end of the frame body 241 is fixed to the lower diaphragm 23.
  • the frame body 241 is fixed to the dome 214.
  • the lower diaphragm 23 is arranged inside the first magnetic steel 32 and connected between the skeleton body 241 and the yoke support platform 312.
  • the lower diaphragm 23 has a ring shape. Specifically, the outer side of the lower diaphragm 23 is fixed to an end of the frame body 241 away from the upper diaphragm 21, and the inner side of the lower diaphragm 23 is fixed to the yoke support platform 312.
  • the lower diaphragm 23 is arranged in a larger space enclosed by the first magnetic steel 32, Therefore, the lower diaphragm 23 can be designed to be relatively large.
  • the vibration space of the lower diaphragm 23 is large, so that the service life of the lower diaphragm 23 is long, and at the same time, it can prevent the sound
  • the lateral swing effect of the ring 22 when vibrating is good, so that the sound generating device 100 is stable.
  • the frame body 241 is ring-shaped and surrounds the yoke support platform 312.
  • the skeleton body 241 includes a body side wall 2411 arranged at intervals between the first magnetic steel 32 and the yoke support table 312.
  • the body side wall 2411 is close to one end of the upper diaphragm 21.
  • the second reinforcement wall 2413 is fixed to the lower diaphragm 23.
  • this structure increases the connection between the first reinforcing wall 2412 and the upper diaphragm 21 by increasing the coupling area The strength, and the connection strength of the second reinforcement wall 2413 and the lower diaphragm 23, thereby improving the vibration reliability of the upper diaphragm 21 and the lower diaphragm 23.
  • the voice coil 22 is arranged around the outer side of the first magnetic steel 32.
  • the first magnetic steel 32 is provided with a fracture 320 penetrating therethrough, and the frame extension 242 extends through the fracture 320 to the magnetic gap 30 Inside and fixed to the voice coil 22 to elastically hang the voice coil 22 below the upper diaphragm 21.
  • the voice coil 22 drives the frame 24 to drive the upper diaphragm 21 and the lower diaphragm 23 to vibrate simultaneously.
  • the skeleton extension 242 includes a skeleton extension body 2421 extending from the skeleton body 241 in the direction of the voice coil 22, and the skeleton extension body 2421 is bent in the direction of the yoke 31
  • the extended first fixed section 2422 of the skeleton and the second fixed section 2423 of the skeleton extended by the first fixed section 2422 of the skeleton bent in a direction away from the main body 241 of the skeleton, and the first fixed section 2422 of the skeleton is fixed to the
  • the voice coil 22 is close to one side of the first magnetic steel 32, and the second fixing section 2423 of the skeleton is fixed to one end of the voice coil 22 close to the yoke 31.
  • the frame first fixing section 2422 and the frame second fixing section 2423 are simultaneously fixed to the two surfaces connected to the voice coil 22, which can make the fixing stronger and improve the reliability.
  • the voice coil 22 can be adjusted in the vibration direction of the diaphragm 21 through the support of the frame fixing portion 243, thereby driving the upper diaphragm 21 and the lower diaphragm 23 to vibrate simultaneously. A greater amplitude improves the acoustic effect of the sound emitting device 100.
  • the yoke support table 312 is rectangular, the first magnets 32 include four, and the two first magnets 32 are arranged on opposite sides of the yoke support table 312 at intervals.
  • the other two first magnets 32 are arranged at intervals on the other opposite sides of the yoke support table 312, the second magnets 33 include four, and the two second magnets 33 are arranged at intervals.
  • the other two second magnetic steels 33 are arranged on the other opposite sides of the first magnetic steel 32 at intervals.
  • the frame body 241 has a ring shape and surrounds the yoke support platform 312.
  • the two adjacent first magnetic steels 32 form the fractures 320 at intervals
  • the skeleton extensions 242 include four, and each of the skeleton extensions 242 respectively extends to the magnetic gap through one of the fractures 320 Within 30.
  • This structure ensures that the magnetic circuit performance of the magnetic circuit system 3 is basically unchanged, and a relatively large space can be formed in the first magnetic steel 32, and the space can accommodate the lower diaphragm 23.
  • the voice coil 22 is a rectangle with rounded corners
  • the frame fixing portion 243 includes four
  • the four frame extension portions 242 are respectively connected to the four rounded corners of the voice coil 22. . That is, the frame extension 242 is fixed at the position of the rounded corner of the voice coil 22.
  • the lower diaphragm 23 includes a first lower fixing portion 231 fixed to the yoke support platform 312, and a lower folding ring portion 232 bent and extended from the outer periphery of the first lower fixing portion 231 And a second lower fixing portion 233 extending from the outer periphery of the lower folding ring portion 232 in the direction of the first magnetic steel 32.
  • the lower folding ring portion 232 and the second lower fixing portion 233 are both spaced apart from the yoke body 311.
  • the first lower fixing portion 231 is provided with a second through hole 230 penetrating therethrough, and the yoke support 312 covers the second through hole 230.
  • the frame body 241 is fixed to the second lower fixing portion 233. This structure fixes the lower diaphragm 23, and the volume of the lower diaphragm 23 can also be maximized.
  • the upper diaphragm 21, the basin frame 1, the skeleton body 241, the lower diaphragm 23, and the magnetic circuit system 3 collectively enclose the first inner acoustic cavity 101, and the upper vibration
  • the diaphragm 21, the skeleton body 241, the lower diaphragm 23, and the yoke support platform 312 jointly enclose the second inner acoustic cavity 102.
  • the skeleton body 241 is provided with a leakage hole 240 penetrating therethrough.
  • the second internal acoustic cavity 102 communicates with the first internal acoustic cavity 101 through the leakage hole 240.
  • the leakage hole 240 includes a plurality of leakage holes 240, and the plurality of leakage holes 240 are spaced apart from each other.
  • the arrangement of the leakage hole 240 is beneficial to the air pressure balance of the first inner acoustic cavity 101 and the second inner acoustic cavity 10, thereby making the upper diaphragm 21 and the lower diaphragm 23 vibrate at a larger amplitude simultaneously.
  • the vibration of the lower diaphragm 23 is more effective, and the life of the lower diaphragm 23 is also improved.
  • the yoke support table 312 includes a support plate 3121 disposed opposite to the upper diaphragm 21, and a support plate 3121 bent and extended from the outer periphery of the support plate 3121 in the direction of the yoke body 311
  • the supporting table side wall 3122 is connected to the yoke body 311 and is spaced from the first magnetic steel 32 to form an interval gap 301.
  • the first lower fixing portion 231 is fixed to the support plate 3121, and the lower folding ring portion 232 is recessed in a direction approaching the yoke body 311 and is accommodated in the gap 301.
  • This structure enables the lower ring portion 232 of the lower diaphragm 23 for vibration to have a larger vibration space in the interval gap 301 and a better vibration effect.
  • the yoke body 311 includes a first escape groove 302 and a second escape groove 303 formed by recessing its side close to the upper diaphragm 21 in a direction away from the upper diaphragm 21, so
  • the first avoiding groove 302 is arranged in the magnetic gap 30, and this structure makes the vibration amplitude of the voice coil 22 larger and improves the reliability.
  • the second avoiding groove 303 is arranged in the interval gap 301, and this structure makes the vibration amplitude of the lower folding ring portion 232 of the lower diaphragm 23 larger, which improves reliability.
  • the magnetic circuit system 3 further includes a first clamping plate 34 stacked on the first magnetic steel 32 and a ring-shaped second clamping plate 35 stacked on the second magnetic steel 33;
  • the first clamping plates 34 include four, and each of the first clamping plates 34 is stacked on an adjacent one of the first magnets 32;
  • the second clamping plate 35 also includes two first bodies 351 and Two second bodies 352 connected between the first bodies 351 on the adjacent side, and the second bodies 352 are fixed to the basin frame 1. This structure forms an external magnetic circuit system.
  • the magnetic circuit system structure makes the first magnetic steel 32, the first clamping plate 34, the second magnetic steel 33 and the second clamping plate 35 form the magnetic gap 30 It is larger and has a better height in the vibration direction of the upper diaphragm 21, so that the vibration amplitude of the voice coil 22 is large, and at the same time, the magnetic field strength of the magnetic circuit system is effectively improved, and the magnetic circuit system of the magnetic circuit system is improved.
  • the driving force and symmetry enhance the acoustic performance and reliability of the sound emitting device 100.
  • the magnetic circuit system 3 further includes an auxiliary magnet 36 superimposed on the second clamping plate 35, and the second magnet 33 and the auxiliary magnet 36 are arranged opposite to each other in the same pole.
  • the opposite magnetic pole is opposite to the magnetic pole on the side of the first magnet 32 close to the first clamping plate 34.
  • the auxiliary magnets 36 include four. Two auxiliary magnets 36 are stacked on two opposite first bodies 351, and the other two auxiliary magnets 36 are stacked on two opposite second bodies 351. ⁇ 352.
  • the voice coil 22 is arranged on the inner side of the auxiliary magnet 36 at intervals. This structure enables the auxiliary magnet 36 to increase the driving force of the magnetic circuit system 3, and the auxiliary magnet 36 can be arranged to the greatest extent. Keep the structural volume of the magnetic circuit system 3 maximized, thereby maintaining the strength of the magnetic field.
  • the sound-generating device of the present invention sets the yoke of the magnetic circuit system with a yoke support stand protruding upward in the direction of the diaphragm, and by setting the yoke support stand on the inner side of the first magnetic steel, the voice coil surrounds It is arranged on the outside of the first magnetic steel, the first magnetic steel is provided with a fracture, and the skeleton body of the skeleton is connected to the upper diaphragm and the lower diaphragm and extends to the inner side of the first magnetic steel, and the skeleton extension part of the skeleton is penetrated Pass the fracture and fix it to the voice coil.
  • the lower diaphragm is arranged inside the first magnetic steel and connected between the frame body and the yoke support platform.
  • This structure makes the lower diaphragm accommodated in the space enclosed by the first magnetic steel Internally, compared to the space between the lower diaphragm set in the frame and the voice coil in the related art, the space enclosed by the lower diaphragm set in the first magnetic steel is relatively large, so that the lower diaphragm can be designed to be larger.
  • the vibration space of the diaphragm is large, so that the service life of the lower diaphragm is long, and the effect of preventing the lateral swing of the voice coil when vibrating is good, so that the sound generating device has good stability.

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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

本发明提供了一种发声器件，其包括振动系统和磁路系统，振动系统包括上振膜、音圈、下振膜及骨架，磁路系统包括磁轭和第一磁钢，磁轭包括磁轭本体和磁轭支撑台，第一磁钢固定于磁轭本体，音圈环绕设置于第一磁钢的外侧，磁轭支撑台设置于第一磁钢的内侧；骨架包括连接上振膜和下振膜且延伸至第一磁钢内侧的骨架本体和由骨架本体向音圈的方向延伸的骨架延伸部；下振膜设置于第一磁钢的内侧并连接于骨架本体和磁轭支撑台之间；第一磁钢设有贯穿其上的断口，骨架延伸部穿过断口并固定于音圈。与相关技术相比，本发明的发声器件的下振膜使用寿命长且可靠性高。

Description

发声器件 技术领域
本发明涉及电声转换领域，尤其涉及一种运用于电子音箱产品的发声器件。
 背景技术
随着移动互联网时代的到来，智能移动设备的数量不断上升。而在众多移动设备之中，手机无疑是最常见、最便携的移动终端设备。目前，手机的功能极其多样，其中之一便是高品质的音乐功能，因此，用于播放声音的发声器件被大量应用到现在的智能移动设备之中。
相关技术的所述发声器件包括盆架和分别固定于所述盆架的振动系统及具有磁间隙的磁路系统；所述振动系统包括固定于所述盆架的上振膜、固定于所述上振膜并插设于所述磁间隙以驱动所述振膜振动发声的音圈、与所述上振膜相对设置的下振膜以及分别连接所述上振膜和所述下振膜的骨架，所述下振膜的一端固定于所述盆架，另一端固定于所述音圈远离所述振膜一端的下振膜。
 技术问题
然而，相关技术中所述发声器件中，所述下振膜固定于所述音圈的相对两端，虽然所述下振膜可有效防止所述音圈振动时的横向摆动，但其夹设于所述盆架和所述音圈之间的空间较小导致下振膜的振动空间小，在超大振幅（Xmax>1.0mm）条件下，下振膜的振动幅度受限，使下振膜的使用寿命较短，另外还造成音圈的稳定性差，使得发声器件的可靠性差。
因此，实有必要提供一种新的发声器件解决上述技术问题。
 技术解决方案
本发明的目的在于提供一种下振膜使用寿命长且可靠性高的发声器件。
为了达到上述目的，本发明提供了一种发声器件，其包括振动系统和驱动所述振动系统振动发声的磁路系统，所述振动系统包括用于振动发声的上振膜、驱动所述上振膜振动发声的音圈、与所述上振膜相对间隔设置的下振膜以及设置于所述上振膜和所述下振膜之间的骨架，所述磁路系统包括与所述上振膜相对间隔设置的磁轭和固定于所述磁轭的第一磁钢，所述磁轭包括磁轭本体和由所述磁轭本体向所述上振膜的方向凸出延伸的磁轭支撑台，所述第一磁钢固定于所述磁轭本体，所述音圈环绕设置于所述第一磁钢的外侧，所述磁轭支撑台设置于所述第一磁钢的内侧；所述骨架包括连接所述上振膜和所述下振膜且延伸至所述第一磁钢内侧的骨架本体和由所述骨架本体向所述音圈的方向延伸的骨架延伸部；所述下振膜设置于所述第一磁钢的内侧并连接于所述骨架本体和所述磁轭支撑台之间；所述第一磁钢设有贯穿其上的断口，所述骨架延伸部穿过所述断口并固定于所述音圈。
优选的，所述磁路系统还包括固定于所述磁轭本体的第二磁钢，所述第二磁钢设置于所述第一磁钢的外侧并与所述第一磁钢间隔形成磁间隙，所述音圈插设于所述磁间隙。
优选的，所述骨架延伸部包括由所述骨架本体向所述音圈的方向延伸的骨架延伸部本体、由所述骨架延伸部本体向所述磁轭的方向弯折延伸的骨架第一固定段和由所述骨架第一固定段向远离所述骨架本体的方向弯折延伸的骨架第二固定段，所述骨架第一固定段固定于所述音圈靠近所述第一磁钢的一侧，所述骨架第二固定段固定于所述音圈靠近所述磁轭的一端。
优选的，所述磁轭支撑台呈矩形，所述第一磁钢包括四个，两个所述第一磁钢间隔设置于所述磁轭支撑台的相对两侧，另两个所述第一磁钢间隔设置于所述磁轭支撑台的另外相对两侧；相邻的两个所述第一磁钢间隔形成所述断口，所述骨架延伸部包括四个，每一所述骨架延伸部穿过一个相邻的所述断口。
优选的，所述音圈呈带圆角的矩形，四个所述骨架延伸部分别连接于所述音圈的四个圆角的位置。
优选的，所述发声器件还包括用于分别支撑所述振动系统和所述磁路系统的盆架，所述上振膜、所述盆架、所述骨架本体、所述下振膜以及所述磁路系统共同围成第一内声腔，所述上振膜、所述骨架本体、所述下振膜以及所述磁轭支撑台共同围成第二内声腔，所述骨架本体设有贯穿其上的泄露孔，所述第二内声腔通过所述泄露孔和所述第一内声腔连通。
优选的，所述泄露孔包括多个，多个所述泄露孔相互间隔设置。
优选的，所述下振膜呈环状，所述下振膜包括固定于所述磁轭支撑台的第一下固定部、由所述第一下固定部的外周缘弯折延伸的下折环部以及由所述下折环部的外周缘向所述第一磁钢方向延伸的第二下固定部，所述骨架本体固定于所述第二下固定部。
优选的，所述磁轭支撑台包括与所述上振膜相对设置的支撑台板和由所述支撑台板外周缘向所述磁轭本体弯折延伸的支撑台侧壁，所述支撑台侧壁连接于所述磁轭本体并与所述第一磁钢间隔形成间隔空隙，所述第一下固定部固定于所述支撑台板，所述下折环部向靠近所述磁轭本体的方向凹陷并收容于所述间隔空隙内。
优选的，所述磁路系统还包括叠设于所述第一磁钢的第一夹板和叠设于所述第二磁钢的第二夹板以及叠设于所述第二夹板的辅助磁钢，所述第二磁钢与所述辅助磁钢同极相对设置并且所述同极相对的磁极与所述第一磁钢靠近所述第一夹板一侧的磁极相反。
 有益效果
与相关技术相比，本发明的发声器件将磁路系统的磁轭设置向上振膜方向凸起的磁轭支撑台，并通过将磁轭支撑台设置于第一磁钢的内侧，音圈环绕设置于第一磁钢的外侧，第一磁钢设有断口,并将骨架的骨架本体连接上振膜和下振膜且延伸至所述第一磁钢内侧，并将骨架的骨架延伸部穿过断口并固定于音圈，同时将下振膜设置于第一磁钢的内侧并连接于骨架本体和磁轭支撑台之间，该结构使得下振膜收容于第一磁钢围成的空间内，相对于相关技术的下振膜设置于盆架和音圈之间的空间，下振膜设置于第一磁钢围成的空间相对较大，从而使得下振膜可以设计得比较大，下振膜的振动空间大，使得下振膜的使用寿命长，并达到防止所述音圈振动时的横向摆动效果好，从而使得发声器件稳定性好。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，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获得其它的附图，其中：
图1为本发明发声器件的立体结构示意图；
图2为本发明发声器件的部分立体结构分解图；
图3为沿图1中A-A线的剖示图；
图4为本发明发声器件去掉磁轭的立体装配结构示意图；
图5为本发明发声器件的上振膜、下振膜、音圈及骨架的立体装配结构示意图；
图6为本发明发声器件的骨架的立体结构示意图；
图7为本发明发声器件的磁轭的立体结构示意图。
 本发明的实施方式
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做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请同时参阅图1-7，本发明提供了一种发声器件100，其包括振动系统2和磁路系统3，所述磁路系统3驱动所述振动系统2振动发声。所述磁路系统3具体有磁间隙30。
本实施方式中，所述发声器件100还包括用于分别支撑所述振动系统2和所述磁路系统3的盆架1。
所述振动系统2固定于所述盆架1设置。具体的，所述振动系统2包括固定于所述盆架1的用于振动发声的上振膜21、插设于所述磁间隙30以驱动所述上振膜21振动发声的音圈22、与所述上振膜21相对间隔设置的下振膜23以及设置于所述上振膜21和所述下振膜23之间的骨架24。
本实施方式中，所述上振膜21包括固定于所述盆架1的上固定部211、由所述上固定部211的周缘弯折延伸呈环状的上折环部212、由所述上折环部212向远离所述上固定部211的方向弯折延伸的上振动部213以及贴设固定于所述上振动部213的球顶214，所述上振动部213设有贯穿其上的第一通孔210，所述球顶214覆盖所述第一通孔210。
本实施方式中，所述磁路系统3包括与所述上振膜21相对间隔设置磁轭31以及分别固定于所述磁轭31的第一磁钢32和第二磁钢33，所述第二磁钢33与所述第一磁钢32间隔形成所述磁间隙30。
所述磁轭31包括磁轭本体311和由所述磁轭本体311向所述上振膜21的方向凸出延伸形成的磁轭支撑台312。
本实施方式中，所述磁轭支撑台312位于所述磁轭本体311的中间。所述第一磁钢32和所述第二磁钢33分别固定于所述磁轭本体311，所述第二磁钢33设置于所述第一磁钢32的外侧并与所述第一磁钢32间隔形成所述磁间隙30。所述第一磁钢32呈环状。所述磁轭支撑台312设置于所述第一磁钢32内侧。该结构一方面使得所述第一磁钢32与所述磁轭支撑台312之间形成一个空间，另一方面使得所述第一磁钢32可以围成环状结构，有利于增大所述磁路系统3的所述磁间隙30的空间，提高所述发声器件100的声学性能。
为了实现所述上振膜21和所述下振膜23同时振动，所述骨架24分别固定于所述音圈22、所述上振膜21和所述下振膜23。具体的，所述骨架24包括连接所述上振膜21和所述下振膜23且延伸至所述第一磁钢32内侧的骨架本体241和由所述骨架本体241向所述音圈22的方向延伸的骨架-延伸部242。
所述骨架本体241的一端固定于所述上振膜21，所述骨架本体241的另一端固定于所述下振膜23。本实施方式中，所述骨架本体241固定于所述球顶214。
所述下振膜23设置于所述第一磁钢32的内侧并连接于所述骨架本体241和所述磁轭支撑台312之间。本实施方式中，所述下振膜23呈环状。具体的，所述下振膜23的外侧固定于所述骨架本体241远离所述上振膜21的一端，所述下振膜23的内侧固定于所述磁轭支撑台312。相对于相关技术的下振膜23设置于所述盆架1和所述音圈22之间的空间，所述下振膜23设置于所述第一磁钢32围成的空间内较大，从而使得所述下振膜23可以设计得比较大。在所述下振膜23的超大振幅（Xmax>1.0mm）条件下，所述下振膜23的振动空间大，从而使得所述下振膜23的使用寿命长，并同时达到防止所述音圈22振动时的横向摆动效果好，从而使得所述发声器件100稳定性好。
本实施方式中个，所述骨架本体241呈环状且环绕所述磁轭支撑台312。具体的，所述骨架本体241包括间隔设置于所述第一磁钢32和所述磁轭支撑台312之间的本体侧壁2411、由所述本体侧壁2411靠近所述上振膜21一端弯折延伸的第一加强壁2412以及由所述本体侧壁2411靠近所述下振膜23一端弯折延伸的第二加强壁2413，所述第一加强壁2412固定于所述上振膜21，所述第二加强壁2413固定于所述下振膜23。通过在所述骨架本体241上设置所述第一加强壁2412和所述第二加强壁2413，该结构通过增加结合面积以增加了所述第一加强壁2412与所述上振膜21的连接强度，以及所述第二加强壁2413和所述下振膜23的连接强度，从而提高所述上振膜21和所述下振膜23的振动可靠性。
所述音圈22环绕设置于所述第一磁钢32的外侧。为了实现将所述骨架24固定于所述音圈22，所述第一磁钢32设有贯穿其上的断口320，所述骨架延伸部242穿过所述断口320延伸至所述磁间隙30内并固定于所述音圈22以将所述音圈22弹性悬挂于所述上振膜21下方。所述音圈22通过驱动所述骨架24以带动所述上振膜21和所述下振膜23同时振动。
具体的，所述骨架延伸部242包括由所述骨架本体241向所述音圈22的方向延伸的骨架延伸部本体2421、由所述骨架延伸部本体2421向所述磁轭31的方向弯折延伸的骨架第一固定段2422和由所述骨架第一固定段2422向远离所述骨架本体241的方向弯折延伸的骨架第二固定段2423，所述骨架第一固定段2422固定于所述音圈22靠近所述第一磁钢32的一侧，所述骨架第二固定段2423固定于所述音圈22靠近所述磁轭31的一端。该结构一方面通过所述骨架第一固定段2422和所述骨架第二固定段2423同时固定于所述音圈22相连接的两个面，可以使得固定更为牢固，提高可靠性，另一方面，可以使得所述音圈22通过所述骨架固定部243的支撑可以调节在所述振膜21的振动方向的高度，从而驱动所述上振膜21和所述下振膜23同时振动的幅度更大，提高所述发声器件100的声学效果。
本实施方式中，所述磁轭支撑台312呈矩形，所述第一磁钢32包括四个，两个所述第一磁钢32间隔设置于所述磁轭支撑台312的相对两侧，另两个所述第一磁钢32间隔设置于所述磁轭支撑台312的另外相对两侧，所述第二磁钢33包括四个，两个所述第二磁钢33间隔设置于所述第一磁钢32的相对两侧，另两个所述第二磁钢33间隔设置于所述第一磁钢32的另外相对两侧。所述骨架本体241呈环状且环绕所述磁轭支撑台312。相邻的两个所述第一磁钢32间隔形成所述断口320，所述骨架延伸部242包括四个，每一所述骨架延伸部242分别经一个所述断口320延伸至所述磁间隙30内。该结构在保证所磁路系统3的磁路性能基本不变的情况下，可以在所述第一磁钢32内形成一个较大空间，该空间可以收容所述下振膜23。
本实施方式中，所述音圈22呈带圆角的矩形，所述骨架固定部243包括四个，四个所述骨架延伸部242分别连接于所述音圈22的四个圆角的位置。即所述骨架延伸部242固定于所述音圈22的圆角的位置，该结构有利于重复利用所述磁路系统3的空间，也有利于组装。
本实施方式中，所述下振膜23包括固定于所述磁轭支撑台312的第一下固定部231、由所述第一下固定部231的外周缘弯折延伸的下折环部232以及由所述下折环部232的外周缘向所述第一磁钢32方向延伸的第二下固定部233。所述下折环部232和所述第二下固定部233均与所述磁轭本体311间隔设置。所述第一下固定部231设有贯穿其上的第二通孔230，所述磁轭支撑台312覆盖所述第二通孔230。所述骨架本体241固定于所述第二下固定部233。该结构将所述下振膜23固定，且所述下振膜23的体积也可以最大化。
本实施方式中，所述上振膜21、所述盆架1、所述骨架本体241、所述下振膜23以及所述磁路系统3共同围成第一内声腔101，所述上振膜21、所述骨架本体241、所述下振膜23以及所述磁轭支撑台312共同围成第二内声腔102，所述骨架本体241设有贯穿其上的泄露孔240，所述第二内声腔102通过所述泄露孔240和所述第一内声腔101连通。更优的，所述泄露孔240包括多个，多个所述泄露孔240相互间隔设置。所述泄露孔240的设置有利于所述第一内声腔101和所述第二内声腔10的气压平衡，从而使得所述上振膜21和所述下振膜23同时振动的幅度更大，并提供所述下振膜23的振动更为有效，也提升所述下振膜23的寿命。
本实施方式中，所述磁轭支撑台312包括与所述上振膜21相对设置的支撑台板3121和由所述支撑台板3121外周缘向所述磁轭本体311的方向弯折延伸的支撑台侧壁3122，所述支撑台侧壁3122连接于所述磁轭本体311并与所述第一磁钢32间隔形成间隔空隙301。所述第一下固定部231固定于所述支撑台板3121，所述下折环部232向靠近所述磁轭本体311的方向凹陷并收容于所述间隔空隙301内。该结构使得所述下振膜23用于振动的所述下折环部232在所述间隔空隙301内的振动空间更大，振动效果更好。
本实施方式中，所述磁轭本体311包括由其靠近所述上振膜21的一侧向远离所述上振膜21的方向凹陷形成的第一避让槽302和第二避让槽303，所述第一避让槽302设置于所述磁间隙30内，该结构使得所述音圈22的振动幅度更大，提高了可靠性。所述第二避让槽303设置于所述间隔空隙301内，该结构使得所述下振膜23的所述下折环部232的振动幅度更大，提高了可靠性。
本实施方式中，所述磁路系统3还包括叠设于所述第一磁钢32的第一夹板34和叠设于所述第二磁钢33的呈环状的第二夹板35；所述第一夹板34包括四个，每一所述第一夹板34叠设于相邻的一个所述第一磁钢32；所述第二夹板35还包括相对设置的两个第一本体351和连接于相邻一侧所述第一本体351之间的两个第二本体352，所述第二本体352固定于所述盆架1。该结构形成外置式磁路系统，该磁路系统结构使得所述第一磁钢32、所述第一夹板34、所述第二磁钢33及所述第二夹板35形成所述磁间隙30较大，并在所述上振膜21的振动方向上的高度更好，从而使得所述音圈22的振动幅度大，同时有效提高了磁路系统的磁场强度，提升了磁路系统的磁驱动力和对称性，从而增强了所述发声器件100的声学性能和可靠性。
本实施方式中，所述磁路系统3还包括叠设于所述第二夹板35的辅助磁钢36，所述第二磁钢33与所述辅助磁钢36同极相对设置并且所述同极相对的磁极与所述第一磁钢32靠近所述第一夹板34一侧的磁极相反。所述辅助磁钢36包括四个，两个所辅助磁钢36叠设于相对的两个所述第一本体351，另两个所辅助磁钢36叠设于相对的两个所述第二本体352。所述音圈22间隔设置于所述辅助磁钢36内侧，该结构使得所述辅助磁钢36提高所述磁路系统3的驱动力，所述辅助磁钢36的设置则可尽大程度的保持磁路系统3的结构体积最大化，从而保持磁场强度。
与相关技术相比，本发明的发声器件将磁路系统的磁轭设置向上振膜方向凸起的磁轭支撑台，并通过将磁轭支撑台设置于第一磁钢的内侧，音圈环绕设置于第一磁钢的外侧，第一磁钢设有断口,并将骨架的骨架本体连接上振膜和下振膜且延伸至所述第一磁钢内侧，并将骨架的骨架延伸部穿过断口并固定于音圈，同时将下振膜设置于第一磁钢的内侧并连接于骨架本体和磁轭支撑台之间，该结构使得下振膜收容于第一磁钢围成的空间内，相对于相关技术的下振膜设置于盆架和音圈之间的空间，下振膜设置于第一磁钢围成的空间相对较大，从而使得下振膜可以设计得比较大，下振膜的振动空间大，使得下振膜的使用寿命长，并达到防止所述音圈振动时的横向摆动效果好，从而使得发声器件稳定性好。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (10)

  1. 一种发声器件，其包括振动系统和驱动所述振动系统振动发声的磁路系统，所述振动系统包括用于振动发声的上振膜、驱动所述上振膜振动发声的音圈、与所述上振膜相对间隔设置的下振膜以及设置于所述上振膜和所述下振膜之间的骨架，所述磁路系统包括与所述上振膜相对间隔设置的磁轭和固定于所述磁轭的第一磁钢，其特征在于，
    所述磁轭包括磁轭本体和由所述磁轭本体向所述上振膜的方向凸出延伸的磁轭支撑台，所述第一磁钢固定于所述磁轭本体，所述音圈环绕设置于所述第一磁钢的外侧，所述磁轭支撑台设置于所述第一磁钢的内侧；
    所述骨架包括连接所述上振膜和所述下振膜且延伸至所述第一磁钢内侧的骨架本体和由所述骨架本体向所述音圈的方向延伸的骨架延伸部；所述下振膜设置于所述第一磁钢的内侧并连接于所述骨架本体和所述磁轭支撑台之间；
    所述第一磁钢设有贯穿其上的断口，所述骨架延伸部穿过所述断口并固定于所述音圈。
  2. 根据权利要求1所述的发声器件，其特征在于，所述磁路系统还包括固定于所述磁轭本体的第二磁钢，所述第二磁钢设置于所述第一磁钢的外侧并与所述第一磁钢间隔形成磁间隙，所述音圈插设于所述磁间隙。
  3. 根据权利要求1所述的发声器件，其特征在于，所述骨架延伸部包括由所述骨架本体向所述音圈的方向延伸的骨架延伸部本体、由所述骨架延伸部本体向所述磁轭的方向弯折延伸的骨架第一固定段和由所述骨架第一固定段向远离所述骨架本体的方向弯折延伸的骨架第二固定段，所述骨架第一固定段固定于所述音圈靠近所述第一磁钢的一侧，所述骨架第二固定段固定于所述音圈靠近所述磁轭的一端。
  4. 根据权利要求1所述的发声器件，其特征在于，所述磁轭支撑台呈矩形，所述第一磁钢包括四个，两个所述第一磁钢间隔设置于所述磁轭支撑台的相对两侧，另两个所述第一磁钢间隔设置于所述磁轭支撑台的另外相对两侧；相邻的两个所述第一磁钢间隔形成所述断口，所述骨架延伸部包括四个，每一所述骨架延伸部穿过一个相邻的所述断口。
  5. 根据权利要求4所述的发声器件，其特征在于，所述音圈呈带圆角的矩形，四个所述骨架延伸部分别连接于所述音圈的四个圆角的位置。
  6. 根据权利要求1所述的发声器件，其特征在于，所述发声器件还包括用于分别支撑所述振动系统和所述磁路系统的盆架，所述上振膜、所述盆架、所述骨架本体、所述下振膜以及所述磁路系统共同围成第一内声腔，所述上振膜、所述骨架本体、所述下振膜以及所述磁轭支撑台共同围成第二内声腔，所述骨架本体设有贯穿其上的泄露孔，所述第二内声腔通过所述泄露孔和所述第一内声腔连通。
  7. 根据权利要求6所述的发声器件，其特征在于，所述泄露孔包括多个，多个所述泄露孔相互间隔设置。
  8. 根据权利要求1所述的发声器件，其特征在于，所述下振膜呈环状，所述下振膜包括固定于所述磁轭支撑台的第一下固定部、由所述第一下固定部的外周缘弯折延伸的下折环部以及由所述下折环部的外周缘向所述第一磁钢方向延伸的第二下固定部，所述骨架本体固定于所述第二下固定部。
  9. 根据权利要求8所述的发声器件，其特征在于，所述磁轭支撑台包括与所述上振膜相对设置的支撑台板和由所述支撑台板外周缘向所述磁轭本体弯折延伸的支撑台侧壁，所述支撑台侧壁连接于所述磁轭本体并与所述第一磁钢间隔形成间隔空隙，所述第一下固定部固定于所述支撑台板，所述下折环部向靠近所述磁轭本体的方向凹陷并收容于所述间隔空隙内。
  10. 根据权利要求2所述的发声器件，其特征在于，所述磁路系统还包括叠设于所述第一磁钢的第一夹板和叠设于所述第二磁钢的第二夹板以及叠设于所述第二夹板的辅助磁钢，所述第二磁钢与所述辅助磁钢同极相对设置并且所述同极相对的磁极与所述第一磁钢靠近所述第一夹板一侧的磁极相反。
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