WO2022007024A1 - 扬声器 - Google Patents

扬声器 Download PDF

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Publication number
WO2022007024A1
WO2022007024A1 PCT/CN2020/104670 CN2020104670W WO2022007024A1 WO 2022007024 A1 WO2022007024 A1 WO 2022007024A1 CN 2020104670 W CN2020104670 W CN 2020104670W WO 2022007024 A1 WO2022007024 A1 WO 2022007024A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
diaphragm
fixed
frame
fixing
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Application number
PCT/CN2020/104670
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English (en)
French (fr)
Inventor
肖波
令狐荣林
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
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 WO2022007024A1 publication Critical patent/WO2022007024A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present invention relates to the field of acoustics and electricity, in particular to a loudspeaker used in portable electronic products.
  • the speaker in the related art includes a basin frame, a vibration system and a magnetic circuit system.
  • the vibration system includes a vibrating membrane fixed on the basin frame, a voice coil that drives the vibrating membrane to vibrate and sound, and an elastic support member. One end of the elastic support member is fixed relative to the basin frame.
  • the elastic support includes a flexible circuit board and an auxiliary vibrating membrane
  • the flexible circuit board includes a first fixing part fixed relative to the basin frame, and a second fixing part spaced from the first fixing part and connecting
  • the auxiliary diaphragm includes a holding part fixed relative to the basin frame, and a ring part and a joint part extending inward from the holding part in order.
  • the second fixing part and the connecting part are stacked on the side of the frame away from the diaphragm by gluing.
  • the stacking structure of the skeleton, the second fixing part and the joint part is not conducive to reducing the thickness of the speaker along the vibration direction on the one hand, and on the other hand, when the thickness of the speaker along the vibration direction is constant, it is not conducive to improving the vibration Amplitude of the system.
  • the purpose of the present invention is to provide a loudspeaker, which can effectively reduce the thickness of the loudspeaker along the vibration direction on the one hand, and increase the amplitude of the vibration system when the thickness of the loudspeaker along the vibration direction is constant.
  • the present invention provides a loudspeaker, including a basin frame, a vibration system accommodated in the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and sound
  • the vibration system includes a vibration system fixed on the basin
  • the component includes a flexible circuit board and an auxiliary diaphragm, the flexible circuit board includes a first fixing part fixed relative to the basin frame, a second fixing part spaced from the first fixing part, and connecting the first fixing part and the deformation part of the second fixing part, the auxiliary diaphragm includes a holding part fixed relative to the basin frame, a ring part and a joint part extending inward from the holding part in order, and the joint part surrounds
  • the opening of the folded ring portion faces the diaphragm
  • the magnetic circuit system has a magnetic yoke fixed on the basin frame, a groove is formed on the yoke, and the folded ring portion is in the The orthographic projection on the yoke is located in the groove.
  • a splint arranged around the frame is fixed in the basin frame, the splint is located between the magnetic yoke and the diaphragm, and the first fixing part and the fixing part are fixed to the The splint is on one side along the vibration direction, and the auxiliary diaphragm is located between the first fixing part and the second fixing part, wherein the splint is provided with an escape to avoid the deformation part. mouth.
  • the orthographic projection of the second fixing portion and the deforming portion on the magnetic yoke is located in the groove.
  • the frame includes a first connection part connected with the diaphragm, a second connection part connected with the combination part and the second fixing part, and a connection between the first connection part and the second connection part.
  • the third connecting part of the connecting part is a first connection part connected with the diaphragm, a second connection part connected with the combination part and the second fixing part, and a connection between the first connection part and the second connection part.
  • a first pad electrically connected to an external circuit is formed on the first fixing portion, and a side electrically connected to the voice coil is formed on the side of the second fixing portion facing the second connecting portion.
  • a second pad, and a window for exposing the second pad is opened on the second connection part.
  • the skeleton further includes a connecting rib connected with the voice coil, the connecting rib is connected with the second connecting portion, and the magnetic circuit system further has an escape groove for avoiding the connecting rib.
  • the side of the magnetic circuit system facing the diaphragm is connected to the diaphragm.
  • the vibrating membrane has a cut hole, and a cover plate covering the cut hole is fixed on the inner periphery of the vibrating membrane.
  • the magnetic circuit system includes a magnetic yoke fixed on the basin frame, a main magnetic part and a plurality of auxiliary magnetic parts fixed on the magnetic yoke, a plurality of the auxiliary magnetic parts and the main magnetic part
  • the voice coil is inserted into the magnetic gap, the escape groove is formed between two adjacent auxiliary magnetic parts, and the inner periphery of the diaphragm is fixed on the cover plate and the Between the auxiliary magnetic parts, the main magnetic part and the cover plate are fixed.
  • the cover plate is a cover plate made of magnetic conductive material.
  • the vibrating membrane comprises a first membrane body, a second membrane body arranged around the first membrane body, and a spherical top connecting the first membrane body and the second membrane body, the first membrane body
  • the inner periphery of the body forms the cut hole
  • the outer periphery of the second membrane body is fixed to the basin frame, and the frame is connected to the dome.
  • the speaker of the present invention can save the auxiliary diaphragm and an adhesive layer by fixing both the joint part and the second fixing part on the surface of the frame away from the diaphragm. Therefore, the thickness of the loudspeaker along the vibration direction can be effectively reduced, or, when the thickness of the loudspeaker along the vibration direction is constant, the amplitude of the vibration system can be increased to improve the acoustic performance of the loudspeaker.
  • FIG. 1 is an exploded view of a preferred embodiment of the speaker of the present invention.
  • FIG. 2 is a schematic structural diagram of the assembled voice coil and the skeleton in the loudspeaker shown in FIG. 1 .
  • FIG. 3 is a schematic structural diagram of the assembled magnetic circuit system in the speaker shown in FIG. 1 .
  • FIG. 4 is a schematic structural diagram of a part of the structure of the speaker shown in FIG. 1 after being assembled.
  • FIG. 5 is a perspective view of the speaker shown in FIG. 1 after being assembled.
  • FIG. 6 is a cross-sectional view of the speaker shown in FIG. 5 along the A-A direction.
  • FIG. 7 is a cross-sectional view of the speaker shown in FIG. 5 along the B-B direction.
  • the speaker includes a basin frame 1 , a vibration system 3 accommodated in the basin frame 1 , and a magnetic circuit system 5 for driving the vibration system 3 to vibrate and produce sound.
  • the magnetic circuit system 5 includes a magnetic yoke 51 fixed on the basin frame 1 , a main magnetic part 53 and a plurality of auxiliary magnetic parts 55 fixed on the magnetic yoke 51 , the plurality of auxiliary magnetic parts 55 and The main magnetic parts 53 are arranged at intervals to form a magnetic gap 5A, and an escape groove 5B is formed between two adjacent auxiliary magnetic parts 55 .
  • auxiliary magnetic parts 55 which are two first auxiliary magnetic parts spaced along the short axis side of the main magnetic part 53 and two auxiliary magnetic parts along the main magnetic part 53 .
  • the two second auxiliary magnetic parts are arranged at intervals along the long axis side of 53 , and the escape groove 5B is formed between the first auxiliary magnetic part and the second auxiliary magnetic part.
  • the main magnet portion 53 includes a first magnet 531 and a second magnet 533 spaced along the vibration direction X, and a magnet 531 and a second magnet 533 sandwiched between the first magnet 531 and the second magnet 533 Main pole core 535 .
  • the secondary magnetic part 55 includes a third magnet 551 and a fourth magnet 553 spaced apart along the vibration direction X, and a secondary pole core 555 sandwiched between the third magnet 551 and the fourth magnet 553 .
  • the secondary pole core 555 and the main pole core 535 are located on the same horizontal plane.
  • the magnetic yoke 51 , the main pole core 535 and the secondary pole core 555 are made of magnetically conductive material. Through the magnetic permeability of the magnetic yoke 51 , the main pole core 535 and the secondary pole core 555 , the magnetic flux in the magnetic gap 5A can be effectively increased, thereby improving the sensitivity of the speaker.
  • the first magnet 531 , the second magnet 533 , the third magnet 551 and the fourth magnet 553 may be magnetic steel or natural lodestones. In this embodiment, preferably, the first magnet 531 , the second magnet 533 , the third magnet 551 and the fourth magnet 553 are all magnetic steel.
  • both the main magnetic part 53 and the secondary magnetic part 55 may be composed of one magnetic steel.
  • the vibration system 3 includes a diaphragm 31 fixed on the basin frame 1 , a voice coil 33 inserted into the magnetic gap 5A and driving the diaphragm 31 to vibrate and sound, and an elastic support 35 , the elastic support 35 One end is fixed relative to the basin frame 1 , and the other end is connected to the diaphragm 31 through the frame 7 .
  • the voice coil 33 When the voice coil 33 is energized, the voice coil 33 will vibrate under the action of the magnetic field of the magnetic circuit system 5 , and at the same time, the voice coil 33 will drive the diaphragm 31 to vibrate together, and the When the diaphragm 31 vibrates, the elastic support 35 is driven to vibrate together.
  • the side of the magnetic circuit system 5 facing the diaphragm 31 is connected to the diaphragm 31 .
  • BL value mechanical-electrical coupling coefficient
  • the diaphragm 31 has a cut hole 31A, and a cover plate 31B covering the cut hole 31A is fixed on the inner periphery of the diaphragm 31 .
  • the inner periphery of the diaphragm 31 is fixed between the cover plate 31B and the secondary magnetic part 55 , and the main magnetic part 53 is fixed to the cover plate 31B.
  • the connection between the magnetic circuit system 5 and the vibrating membrane 31 may also be configured such that the cover plate is fixed between the inner periphery of the vibrating membrane and the secondary magnetic portion , the main magnetic part is fixed with the cover plate.
  • the cover plate 31B is made of a magnetic conductive material.
  • the magnetic flux in the magnetic gap 5A can be effectively increased by the magnetic permeability of the cover plate 31B, so that the sensitivity of the speaker can be improved.
  • the vibrating membrane 31 includes a first membrane body 311 , a second membrane body 313 surrounding the first membrane body 311 , and connecting the first membrane body 311 and the second membrane body 313 .
  • the two elastic support members 35 are arranged at intervals along the long axis of the voice coil 33 .
  • the swing of the voice coil 33 in the direction of the long axis can be limited, and the pure sound effect of the speaker can be improved, especially for a speaker with a large amplitude, the effect is more obvious.
  • the elastic support member 35 includes a flexible circuit board 37 and an auxiliary diaphragm 39 .
  • the flexible circuit board 37 includes a first fixing portion 371 fixed relative to the basin frame 1 , a second fixing portion 373 spaced apart from the first fixing portion 371 , and connecting the first fixing portion 371 and the first fixing portion 371 .
  • Two deformation parts 375 of the fixing part 373 are two deformation parts 375 of the fixing part 373 .
  • a first pad 37A electrically connected to an external circuit is formed on the first fixing portion 371 , and a side of the second fixing portion 373 facing the second connecting portion 73 is formed with the voice coil 33 is electrically connected to the second pad 37B.
  • only one flexible circuit board 37 of the elastic support member 35 is electrically connected to the voice coil 33 .
  • the other flexible circuit board can also be replaced by a base material of the flexible circuit board. Or a non-conductive board made of other materials, which can reduce the cost of using the circuit board.
  • the auxiliary diaphragm 39 includes a holding portion 391 fixed relative to the basin frame 1 , a ring portion 393 and a joint portion 395 extending inward from the holding portion 391 in order, and the joint portion 395 surrounds the magnetic circuit.
  • System 5 The auxiliary diaphragm 39 includes a holding portion 391 fixed relative to the basin frame 1 , a ring portion 393 and a joint portion 395 extending inward from the holding portion 391 in order, and the joint portion 395 surrounds the magnetic circuit. System 5.
  • the joint portion 395 and the second fixing portion 373 are both fixed to the surface of the frame 7 away from the diaphragm 31 , and the second fixing portion 373 is located on the joint portion 395 and the voice coil. between 33.
  • the fixing portion 395 and the second fixing portion 373 and the frame 7 are usually fixed by gluing.
  • the frame 7 is used to fix the joint portion. 395 and the second fixing portion 373 need to be widened relative to the frame in the related art, so that the surface of the frame 7 away from the diaphragm 31 has a sufficient area to be combined with the joint portion. 395 and the second fixing portion 373 are fixed. Specifically, when the frame 7 is formed, the subsequent second connecting portion 73 of the frame 7 needs to be widened.
  • the opening of the folded ring portion 393 faces the diaphragm 31 , a groove 51A is formed on the yoke 51 , and the folded ring portion 393 is on the magnetic yoke 51 .
  • the orthographic projection of is located in the groove 51A, so that when the auxiliary diaphragm 39 vibrates, the groove 51A can avoid the auxiliary diaphragm 39 .
  • the pot frame 1 is fixed with a clamp plate 8 arranged around the frame 7, and the clamp plate 8 is located between the magnetic yoke 51 and the diaphragm 31, and the first fixing portion 371 and the holding portion 391 are fixed on one side of the splint 8 along the vibration direction X, and the auxiliary diaphragm 39 is located between the first fixing portion 371 and the second fixing portion 373, wherein, an escape port 81 for avoiding the deformation portion 375 is provided through the splint 8 .
  • the first fixing portion 371 and the holding portion 391 are fixed on the side of the clamping plate 8 facing the magnetic yoke 51 , and the first pad 37A is located on the first pad 37A.
  • a fixing portion 371 is away from the side of the clamping plate 8 , so as to facilitate the electrical connection between the first pad 37A and the external circuit.
  • the orthographic projection of the second fixing portion 373 and the deforming portion 375 on the magnetic yoke 51 is located in the groove 51A. This can effectively avoid the risk of the second fixing portion 373 and the deforming portion 375 colliding with the magnetic yoke 51 during the vibration of the speaker.
  • the frame 7 includes a first connection portion 71 connected to the diaphragm 31 , a second connection portion 73 connected to the joint portion 395 and the second fixing portion 373 , and the first connection portion 71 and the second fixed portion 373 .
  • the third connecting portion 75 of the second connecting portion 73 and the connecting rib 77 connected to the voice coil 33 are connected to the second connecting portion 73 .
  • the avoiding groove 5B avoids the connecting rib 77 .
  • a window 79 for exposing the second pad 37B is formed on the second connection portion 73 .
  • two connecting ribs 77 are provided along the long axis direction of the voice coil 33 . It can be understood that, in other embodiments, two of the connecting ribs 77 may also be provided along the short axis direction of the basin frame 1 .
  • the frame 7 may not include the connecting ribs, the voice coil 33 is directly connected to the diaphragm 31, and the diaphragm 31 is connected to the magnetic circuit.
  • the systems 5 are arranged at intervals so as to reserve sufficient vibration space for the diaphragm 31 .
  • the magnetic circuit system 5 may not be provided with the avoidance grooves.
  • the auxiliary diaphragm and a portion of the auxiliary diaphragm can be saved.
  • the thickness space of the adhesive layer can effectively reduce the thickness of the loudspeaker along the vibration direction, or, if the thickness of the loudspeaker along the vibration direction is constant, the amplitude of the vibration system can be increased to improve the acoustic performance of the loudspeaker.

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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

本发明提供了一种扬声器，其包括盆架、振动系统及磁路系统，振动系统包括振膜、音圈以及弹性支撑件，弹性支撑件的一端相对盆架固定，其另一端通过骨架与振膜连接，弹性支撑件包括柔性电路板及辅助振膜，柔性电路板包括第一固定部、与第一固定部间隔设置的第二固定部及连接第一固定部和第二固定部的形变部，辅助振膜包括固持部以及自固持部向内依次延伸形成的折环部和结合部，结合部环绕磁路系统，结合部和第二固定部均固定于骨架远离振膜一侧的表面，且第二固定部位于结合部和音圈之间。本实用新型的扬声器一方面可以有效降低扬声器沿振动方向的厚度，另一方面，在扬声器沿振动方向的厚度一定的情况下，可以提高振动系统的振幅。

Description

扬声器 技术领域
本发明涉及声电领域，尤其涉及一种运用于便携式电子产品的扬声器。
 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，用于播放声音的扬声器被大量应用到现在的智能移动设备之中。
相关技术中的扬声器包括盆架、振动系统及磁路系统，振动系统包括固持于盆架的振膜、驱动振膜振动发声的音圈以及弹性支撑件，弹性支撑件的一端相对盆架固定，其另一端通过骨架与振膜连接，弹性支撑件包括柔性电路板及辅助振膜，柔性电路板包括相对盆架固定的第一固定部、与第一固定部间隔设置的第二固定部及连接第一固定部和第二固定部的形变部，辅助振膜包括相对盆架固定的固持部以及自固持部向内依次延伸形成的折环部和结合部。其中，第二固定部和结合部通过胶合的方式堆叠于骨架远离振膜的一侧。然而，这种骨架、第二固定部及结合部三者堆叠的结构一方面不利于降低扬声器沿振动方向的厚度，另一方面，在扬声器沿振动方向的厚度一定的情况下，不利于提高振动系统的振幅。
因此，实有必要提供一种新的扬声器解决上述技术问题。
 技术问题
本发明的目的在于提供一种扬声器，该扬声器一方面可以有效降低扬声器沿振动方向的厚度，另一方面，在扬声器沿振动方向的厚度一定的情况下，可以提高振动系统的振幅。
 技术解决方案
为了达到上述目的，本发明提供了一种扬声器，包括盆架以及收容于所述盆架内的振动系统及驱动所述振动系统振动发声的磁路系统，所述振动系统包括固持于所述盆架的振膜、驱动所述振膜振动发声的音圈以及弹性支撑件，所述弹性支撑件的一端相对所述盆架固定，其另一端通过骨架与所述振膜连接，所述弹性支撑件包括柔性电路板及辅助振膜，所述柔性电路板包括相对所述盆架固定的第一固定部、与所述第一固定部间隔设置的第二固定部及连接所述第一固定部和所述第二固定部的形变部，所述辅助振膜包括相对所述盆架固定的固持部以及自所述固持部向内依次延伸形成的折环部和结合部，所述结合部环绕所述磁路系统，所述结合部和所述第二固定部均固定于所述骨架远离所述振膜一侧的表面，且所述第二固定部位于所述结合部和所述音圈之间。
优选地，所述折环部的开口朝向所述振膜，所述磁路系统具有固持于所述盆架的磁轭，所述磁轭上凹陷形成有凹槽，所述折环部在所述磁轭上的正投影位于所述凹槽内。
优选地，所述盆架内固持有环绕所述骨架设置的夹板，所述夹板位于所述磁轭和所述振膜之间，所述第一固定部和所述固持部固定于所述夹板沿所述振动方向的一侧上，且所述辅助振膜位于所述第一固定部和所述第二固定部之间，其中，所述夹板上贯穿设有避让所述形变部的避让口。
优选地，所述第二固定部和所述形变部在所述磁轭上的正投影位于所述凹槽内。
优选地，所述骨架包括与所述振膜连接的第一连接部、与所述结合部和所述第二固定部连接的第二连接部及连接所述第一连接部和所述第二连接部的第三连接部。
优选地，所述第一固定部上形成有与外部电路电连接的第一焊盘，所述第二固定部朝向所述第二连接部的一侧上形成有与所述音圈电连接的第二焊盘，且所述第二连接部上开设有使所述第二焊盘外露的窗口。
优选地，所述骨架还包括与所述音圈连接的连接筋，所述连接筋与所述第二连接部连接，所述磁路系统还具有避让所述连接筋的避让槽。
优选地，所述磁路系统朝向所述振膜的一侧与所述振膜连接。
优选地，所述振膜具有切中孔，且所述振膜的内周缘上固设有覆盖所述切中孔的盖板。
优选地，所述磁路系统包括固持于所述盆架的磁轭以及固设于所述磁轭上的主磁部和多个副磁部，多个所述副磁部与所述主磁部间隔设置形成磁间隙，所述音圈插入所述磁间隙内，相邻两所述副磁部之间形成所述避让槽，所述振膜的内周缘固定在所述盖板和所述副磁部之间，所述主磁部与所述盖板固定。
优选地，所述盖板为由导磁材料制成的盖板。
优选地，所述振膜包括第一膜体、环绕所述第一膜体设置的第二膜体及连接所述第一膜体和所述第二膜体的球顶，所述第一膜体的内周缘围合形成所述切中孔，所述第二膜体的外周缘固定于所述盆架，所述骨架与所述球顶连接。
 有益效果
与相关技术相比，本发明的扬声器通过将所述结合部和所述第二固定部均固定于所述骨架远离所述振膜一侧的表面，可以节省辅助振膜及一层胶合层的厚度空间，从而可以有效降低扬声器沿振动方向的厚度，或者，在扬声器沿振动方向的厚度一定的情况下，可以提高振动系统的振幅，以提高扬声器的声学性能。
 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为本发明扬声器一较佳实施例的分解图。
图2为图1所示扬声器中音圈与骨架组装后的结构示意图。
图3为图1所示扬声器中磁路系统组装后的结构示意图。
图4为图1所示扬声器中部分结构组装后的结构示意图。
图5为图1所示扬声器组装后的立体图。
图6为图5所示扬声器沿A-A方向的剖示图。
图7为图5所示扬声器沿B-B方向的剖示图。
 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。
请结合参阅图1至图7，扬声器包括盆架1以及收容于所述盆架1内的振动系统3及驱动所述振动系统3振动发声的磁路系统5。
所述磁路系统5包括固持于所述盆架1的磁轭51以及固设于所述磁轭51上的主磁部53和多个副磁部55，多个所述副磁部55与所述主磁部53间隔设置形成磁间隙5A，相邻两所述副磁部55之间形成避让槽5B。
如图1和图3所示，所述副磁部55设有四个，分别为沿所述主磁部53的短轴边间隔设置的两个第一副磁部以及沿所述主磁部53的长轴边间隔设置的两个第二副磁部，所述第一副磁部与所述第二副磁部之间形成所述避让槽5B。
如图6和图7所示，所述主磁部53包括沿振动方向X间隔设置的第一磁体531和第二磁体533以及夹设于所述第一磁体531和所述第二磁体533的主极芯535。
所述副磁部55包括沿振动方向X间隔设置的第三磁体551和第四磁体553以及夹设于所述第三磁体551和所述第四磁体553之间的副极芯555。所述副极芯555和所述主极芯535位于同一水平面上。
其中，所述磁轭51、所述主极芯535及所述副极芯555由导磁材料制成。通过所述磁轭51、所述主极芯535及所述副极芯555的导磁作用，可以有效增加所述磁间隙5A内的磁通量，从而可以提高扬声器的灵敏度。
所述第一磁体531、所述第二磁体533、第三磁体551及所述第四磁体553可以为磁钢，也可以为天然磁石。在本实施方式中，优选地，所述第一磁体531、所述第二磁体533、第三磁体551及所述第四磁体553均为磁钢。
可以理解的是，在其他实施方式中，所述主磁部53和所述副磁部55的结构并不局限于此。例如，所述主磁部53和所述副磁部55也均可以由一个磁钢构成。
所述振动系统3包括固持于所述盆架1的振膜31、插入所述磁间隙5A内并驱动所述振膜31振动发声的音圈33以及弹性支撑件35，所述弹性支撑件35的一端相对所述盆架1固定，其另一端通过骨架7与所述振膜31连接。当所述音圈33通电后，所述音圈33会在所述磁路系统5磁场的作用下振动，与此同时，所述音圈33会驱动所述振膜31一同振动，而所述振膜31振动时会带动所述弹性支撑件35一同振动。
在本实施例中，所述磁路系统5朝向所述振膜31的一侧与所述振膜31连接。这样可以在部改变扬声器厚度的情况下，设计更高的磁路系统，从而提高产品的BL值 （力电耦合系数）以增加产品的灵敏度。
如图1、图6及图7所示，所述振膜31具有切中孔31A，且所述振膜31的内周缘上固设有覆盖所述切中孔31A的盖板31B。所述振膜31的内周缘固定在所述盖板31B和所述副磁部55之间，所述主磁部53与所述盖板31B固定。可以理解的是，在其他实施方式中，所述磁路系统5与所述振膜31的连接也可以设置成所述盖板固定在所述振膜的内周缘和所述副磁部之间，所述主磁部与所述盖板固定。
在本实施方式中，优选地，所述盖板31B由导磁材料制成。通过所述盖板31B的导磁作用可以有效增加所述磁间隙5A内的磁通量，从而可以提高扬声器的灵敏度。
如图1和图6所示，所述振膜31包括第一膜体311、环绕所述第一膜体311设置的第二膜体313及连接所述第一膜体311和所述第二膜体313的球顶315，所述第一膜体311的内周缘围合形成所述切中孔31A，所述第二膜体313的外周缘固持于所述盆架1上，所述骨架7与所述球顶315连接。
如图1、图6及图7所示，所述弹性支撑件35设有两个，且两个所述弹性支撑件35沿所述音圈33的长轴边间隔设置。通过设置所述弹性支撑件35可以限制所述音圈33沿长轴方向的摇摆，改善所述扬声器的纯音效果，尤其是对于超大振幅的扬声器，效果更加明显。
所述弹性支撑件35包括柔性电路板37及辅助振膜39。
所述柔性电路板37包括相对所述盆架1固定的第一固定部371、与所述第一固定部371间隔设置的第二固定部373及连接所述第一固定部371和所述第二固定部373的形变部375。
其中，所述第一固定部371上形成有与外部电路电连接的第一焊盘37A，所述第二固定部373朝向所述第二连接部73的一侧上形成有与所述音圈33电连接的第二焊盘37B。
在本实施方式中，优选地，仅一个所述弹性支撑件35的柔性电路板37与所述音圈33电连接。这样可以减少焊接封线工序。更进一步优选地，当仅一个所述弹性支撑件35的柔性电路板37与所述音圈33电连接时，另一个所述柔性电路板还可以替换为由柔性电路板的基材材料制成或由其他材料制成的非导电板，这样可以降低了电路板的使用成本。
所述辅助振膜39包括相对所述盆架1固定的固持部391以及自所述固持部391向内依次延伸形成的折环部393和结合部395，所述结合部395环绕所述磁路系统5。
所述结合部395和所述第二固定部373均固定于所述骨架7远离所述振膜31一侧的表面，且所述第二固定部373位于所述结合部395和所述音圈33之间。其中，所述结合部395和所述第二固定部373与所述骨架7的固定通常采用胶合的方式固定。
可以理解的是，为了使所述结合部395和所述第二固定部373均能固定于所述骨架7远离所述振膜31一侧的表面，所述骨架7用于固定所述结合部395和所述第二固定部373的部位相对于相关技术中的骨架，需要进行加宽处理，以使得所述骨架7远离所述振膜31一侧的表面具有足够的面积与所述结合部395和所述第二固定部373固定。具体地，所述骨架7成型时，需要所述骨架7的后续的所述第二连接部73进行加宽处理。
如图6和图7所示，所述折环部393的开口朝向所述振膜31，所述磁轭51上凹陷形成有凹槽51A，所述折环部393在所述磁轭51上的正投影位于所述凹槽51A内，从而使得所述辅助振膜39振动时，所述凹槽51A可避让所述辅助振膜39。
在本实施方式中，所述盆架1内固持有环绕所述骨架7设置的夹板8，所述夹板8位于所述磁轭51和所述振膜31之间，所述第一固定部371和所述固持部391固定于所述夹板8沿所述振动方向X的一侧上，且所述辅助振膜39位于所述第一固定部371和所述第二固定部373之间，其中，所述夹板8上贯穿设有避让所述形变部375的避让口81。
如图6和图7所示，所述第一固定部371和所述固持部391固定于所述夹板8朝向所述磁轭51的一侧上，所述第一焊盘37A位于所述第一固定部371远离所述夹板8的一侧，从而便于所述第一焊盘37A与外部电路电连接。
在本实施方式中，优选地，所述第二固定部373和所述形变部375在所述磁轭51上的正投影位于所述凹槽51A内。这样可以有效避免扬声器振动过程中出现所述第二固定部373和所述形变部375与所述磁轭51发生碰撞的风险。
所述骨架7包括与所述振膜31连接的第一连接部71、与所述结合部395和所述第二固定部373连接的第二连接部73、连接所述第一连接部71和所述第二连接部73的第三连接部75以及与所述音圈33连接的连接筋77，所述连接筋77与所述第二连接部73连接，所述磁路系统5的所述避让槽5B避让所述连接筋77。为了便于所述第二焊盘37B与所述音圈33焊接，所述第二连接部73上开设有使所述第二焊盘37B外露的窗口79。
如图1、图2及图7所示，沿所述音圈33的长轴方向设有两个所述连接筋77。可以理解的是，在其他实施方式中，沿所述盆架1的短轴方向也可以设置两个所述连接筋77。
可以理解的是，在其他实施例中，所述骨架7还可以不包括所述连接筋，所述音圈33直接连接在所述振膜31上，且所述振膜31与所述磁路系统5间隔设置，以便给所述振膜31预留充足的振动空间，相应的，所述磁路系统5可以不设置避让所述避让槽。
与相关技术相比，本发明的扬声器通过将所述结合部395和所述第二固定部373均固定于所述骨架7远离所述振膜31一侧的表面，可以节省辅助振膜及一层胶合层的厚度空间，从而可以有效降低扬声器沿振动方向的厚度，或者，在扬声器沿振动方向的厚度一定的情况下，可以提高振动系统的振幅，以提高扬声器的声学性能。
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 (12)

  1. 一种扬声器，包括盆架以及收容于所述盆架内的振动系统及驱动所述振动系统振动发声的磁路系统，所述振动系统包括固持于所述盆架的振膜、驱动所述振膜振动发声的音圈以及弹性支撑件，所述弹性支撑件的一端相对所述盆架固定，其另一端通过骨架与所述振膜连接，所述弹性支撑件包括柔性电路板及辅助振膜，所述柔性电路板包括相对所述盆架固定的第一固定部、与所述第一固定部间隔设置的第二固定部及连接所述第一固定部和所述第二固定部的形变部，所述辅助振膜包括相对所述盆架固定的固持部以及自所述固持部向内依次延伸形成的折环部和结合部，所述结合部环绕所述磁路系统，其特征在于，所述结合部和所述第二固定部均固定于所述骨架远离所述振膜一侧的表面，且所述第二固定部位于所述结合部和所述音圈之间。
  2. 根据权利要求1所述的扬声器，其特征在于，所述折环部的开口朝向所述振膜，所述磁路系统具有固持于所述盆架的磁轭，所述磁轭上凹陷形成有凹槽，所述折环部在所述磁轭上的正投影位于所述凹槽内。
  3. 根据权利要求2所述的扬声器，其特征在于，所述盆架内固持有环绕所述骨架设置的夹板，所述夹板位于所述磁轭和所述振膜之间，所述第一固定部和所述固持部固定于所述夹板沿所述振动方向的一侧上，且所述辅助振膜位于所述第一固定部和所述第二固定部之间，其中，所述夹板上贯穿设有避让所述形变部的避让口。
  4. 根据权利要求3所述的扬声器，其特征在于，所述第二固定部和所述形变部在所述磁轭上的正投影位于所述凹槽内。
  5. 根据权利要求1所述的扬声器，其特征在于，所述骨架包括与所述振膜连接的第一连接部、与所述结合部和所述第二固定部连接的第二连接部及连接所述第一连接部和所述第二连接部的第三连接部。
  6. 根据权利要求5所述的扬声器，其特征在于，所述第一固定部上形成有与外部电路电连接的第一焊盘，所述第二固定部朝向所述第二连接部的一侧上形成有与所述音圈电连接的第二焊盘，且所述第二连接部上开设有使所述第二焊盘外露的窗口。
  7. 根据权利要求5所述的扬声器，其特征在于，所述骨架还包括与所述音圈连接的连接筋，所述连接筋与所述第二连接部连接，所述磁路系统还具有避让所述连接筋的避让槽。
  8. 根据权利要求7所述的扬声器，其特征在于，所述磁路系统朝向所述振膜的一侧与所述振膜连接。
  9. 根据权利要求8所述的扬声器，其特征在于，所述振膜具有切中孔，且所述振膜的内周缘上固设有覆盖所述切中孔的盖板。
  10. 根据权利要求9所述的扬声器，其特征在于，所述磁路系统包括固持于所述盆架的磁轭以及固设于所述磁轭上的主磁部和多个副磁部，多个所述副磁部与所述主磁部间隔设置形成磁间隙，所述音圈插入所述磁间隙内，相邻两所述副磁部之间形成所述避让槽，所述振膜的内周缘固定在所述盖板和所述副磁部之间，所述主磁部与所述盖板固定。
  11. 根据权利要求10所述的扬声器，其特征在于，所述盖板为由导磁材料制成的盖板。
  12. 根据权利要求9所述的扬声器，其特征在于，所述振膜包括第一膜体、环绕所述第一膜体设置的第二膜体及连接所述第一膜体和所述第二膜体的球顶，所述第一膜体的内周缘围合形成所述切中孔，所述第二膜体的外周缘固定于所述盆架，所述骨架与所述球顶连接。
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