WO2021134317A1 - 扬声器 - Google Patents

扬声器 Download PDF

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Publication number
WO2021134317A1
WO2021134317A1 PCT/CN2019/130146 CN2019130146W WO2021134317A1 WO 2021134317 A1 WO2021134317 A1 WO 2021134317A1 CN 2019130146 W CN2019130146 W CN 2019130146W WO 2021134317 A1 WO2021134317 A1 WO 2021134317A1
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WO
WIPO (PCT)
Prior art keywords
housing
dome
magnetic steel
vibration
main body
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PCT/CN2019/130146
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English (en)
French (fr)
Inventor
吴树文
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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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
Priority to PCT/CN2019/130146 priority Critical patent/WO2021134317A1/zh
Publication of WO2021134317A1 publication Critical patent/WO2021134317A1/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
    • H04R9/06—Loudspeakers

Definitions

  • the invention relates to the field of electro-acoustic conversion, in particular to a loudspeaker.
  • the speakers used in such equipment are required to be correspondingly more miniaturized, so that the cooperation between the speakers and other peripheral components is more compact.
  • the quality requirements for the speakers used therein are also getting higher and higher.
  • the dome of the speaker is far away from the magnetic circuit, so that the voice coil is not completely located in the magnetic gap, so that the magnetic flux is reduced, and the space above the dome is all left to the front cavity of the speaker.
  • the object of the present invention is to provide a loudspeaker which can increase the magnetic flux, thereby improving the acoustic performance.
  • the speaker provided by the present invention includes a housing with a housing space, a vibration system housed in the housing, and a magnetic circuit system that drives the vibration system to vibrate and produce sound.
  • the vibration system divides the housing space into a front cavity and The rear cavity, the front cavity is in communication with the outside, the housing also has two bottom walls spaced apart along the vibration direction, and the magnetic circuit system is respectively provided on opposite sides of the vibration system along the vibration direction.
  • the magnetic circuit system is fixed on the bottom wall, the vibration system includes a voice coil, a dome and a sound film, and the voice coil includes a ring-shaped main body part and an extension part extending from the outside of the main body part,
  • the dome is fixed in the main body and divides the main body into a first part and a second part.
  • the extension part and the dome are located on the same horizontal plane.
  • the dome is a dome made of an armature.
  • the magnetic circuit system includes a magnet
  • the magnet includes a main magnet opposite to and spaced apart from the dome
  • the orthographic projection of the main magnet on the dome is located on the dome. In the range.
  • the magnet further includes a secondary magnet arranged around the main magnet and forming a magnetic gap with the main magnet, and the magnetizing directions of the main magnet and the secondary magnet are opposite,
  • the orthographic projection of the main body portion on the bottom wall is located between the main magnet and the auxiliary magnet.
  • the secondary magnetic steel has a continuous ring structure.
  • the first part and the second part are symmetrically distributed with respect to the plane where the dome is located.
  • the magnetic circuit system further includes a pole core attached to a side of the magnetic steel away from the dome.
  • a groove is recessed on the bottom wall, and the pole core is fixed in the groove.
  • the housing includes a first housing and a second housing that is enclosed and assembled with the first housing to form the accommodating space
  • the first housing includes a first bottom that is perpendicular to the direction of vibration.
  • the fixing portion is fixed on the first side wall and the first surrounding wall, and the vibration system is enclosed with the first bottom wall, the first side wall and the first surrounding wall
  • the front cavity is formed.
  • a sound hole connecting the front cavity and the outside is provided on the first side wall.
  • the speaker provided by the present invention is provided with the magnetic circuit system on opposite sides of the vibration system along the vibration direction.
  • the vibration system includes a voice coil, a dome, and a sound film. It includes a ring-shaped body portion and an extension portion extending from the outside of the body portion.
  • the dome is fixed in the body portion and divides the body portion into a first part and a second part.
  • the extension part Located on the same horizontal plane as the dome, the sound membrane includes a folding ring portion, a fixing portion extending outward from the folding ring portion, and a joining portion extending inward from the folding ring portion, and the fixing
  • the coupling portion is fixed on the casing, and the coupling portion is fixed on one side surface of the extension portion along the vibration direction, so that the voice coil has driving force on opposite sides of the voice coil along the vibration direction (that is, the magnetic flux is increased), Thereby improving the acoustic performance of the speaker.
  • Figure 1 is an exploded view of a preferred embodiment of the speaker provided by the present invention.
  • Fig. 2 is a schematic structural diagram of the speaker shown in Fig. 1 from another angle;
  • Fig. 3 is a perspective view of the speaker shown in Fig. 1 after being assembled
  • Figure 4 is a cross-sectional view of the speaker shown in Figure 3 along the A-A direction;
  • FIG. 5 is a schematic diagram of the structure of the housing in the speaker shown in FIG. 4;
  • FIG. 6 is a schematic diagram of the magnetic pole distribution of another embodiment of the magnetic circuit system in the speaker shown in FIG. 4;
  • Fig. 7 is a cross-sectional view of the loudspeaker shown in Fig. 3 along the B-B direction.
  • the speaker includes a housing 1 with a housing space 1A, a vibration system 3 housed in the housing 1, and a magnetic circuit system 5 that drives the vibration system 3 to vibrate and produce sound.
  • the vibration system 3 divides the receiving space 1A into a front cavity 1B and a rear cavity 1C, and the front cavity 1B is in communication with the outside.
  • the housing 1 further has two bottom walls 111, 131 spaced apart along the vibration direction X, and the magnetic circuit system 5 is respectively provided on opposite sides of the vibration system 3 along the vibration direction X.
  • the road system 5 is fixed on the bottom walls 111 and 131.
  • the bottom walls 111 and 131 are respectively the first bottom wall 111 and the second bottom wall 131 described below.
  • the housing 1 includes a first housing 11 and a second housing 13 that is enclosed and assembled with the first housing 11 to form the receiving space 1A.
  • the first housing 11 includes a first bottom wall 111 perpendicular to the vibration direction X, a first side wall 113 formed by bending and extending from the periphery of the first bottom wall 111 toward the second housing 13, and The first bottom wall 111 extends toward the second housing 13 to form a first surrounding wall 115, the vibration system 3 is fixed on the first side wall 113 and the first surrounding wall 115, and The vibration system 3 encloses the first bottom wall 111, the first side wall 113, and the first surrounding wall 115 to form the front cavity 1B.
  • the second housing 13 includes a second bottom wall 131 perpendicular to the vibration direction X, and a second side wall 133 formed by bending and extending from the periphery of the second bottom wall 133 toward the first housing 11.
  • the first side wall 113 is provided with a sound hole 7 connecting the front cavity 1B and the outside. It can be understood that, in other embodiments, the sound hole may also be provided on the first bottom wall according to actual usage requirements.
  • the vibration system 3 includes a voice coil 31, a dome 33 and a sound film 35.
  • the voice coil 31 includes a ring-shaped body portion 311 and an extension portion 313 extending from the outside of the body portion 311.
  • the dome 33 is fixed in the body portion 311 and divides the body portion 311 There are a first part 315 and a second part 317, and the extension part 313 and the dome 33 are located on the same horizontal plane.
  • the sound film 35 includes a folding ring portion 351, a fixing portion 353 extending outward from the folding ring portion 351, and a coupling portion 355 extending inward from the folding ring portion 353, and the fixing portion 353 is fixed at On the housing 1, the coupling portion 355 is fixed on one side surface of the extension portion 313 along the vibration direction X. Wherein, the fixing portion 353 is fixed on the first side wall 113 and the first surrounding wall 115.
  • the voice coil 31 is connected to an external circuit. After the voice coil 31 is energized, the voice coil 31 will vibrate under the action of the magnetic field of the magnetic circuit system 5, and the vibration of the voice coil 31 will drive the sound film 35 vibrate to make a sound.
  • the dome 33 is a dome made of an armature.
  • the voice coil 31 When the voice coil 31 is energized, the dome 33 located in the voice coil 31 is magnetized by the magnetic field of the voice coil 31.
  • the magnetized dome 33 also becomes a magnet, so that the magnetic field of the voice coil 31 and the magnetic field of the dome 33 are superimposed on each other, so that the magnetism of the vibration system 3 is greatly enhanced, which can further Improve acoustic performance.
  • the magnetic circuit system 5 includes a magnet 51, the magnet 51 includes a main magnet 511 arranged at intervals opposite to the dome 33, and the orthographic projection of the main magnet 511 on the dome 33 is located Within the range of the dome 33.
  • the first part 315 and the second part 317 are symmetrically distributed with respect to the plane where the dome 33 is located. This can make full use of the vibration space, which is beneficial to reduce the size of the speaker along the vibration direction.
  • the magnet 51 further includes a secondary magnet 513 arranged around the main magnet 511 and forming a magnetic gap 51A between the main magnet 511 and the main magnet 511 and the secondary magnet 513.
  • the magnetic direction is opposite, and the orthographic projection of the main body 311 on the bottom wall is located between the main magnet 511 and the auxiliary magnet 513.
  • the secondary magnetic steel 513 has a continuous ring structure.
  • the auxiliary magnet may also be arranged in a split structure arranged at intervals. For example, there are four auxiliary magnets, and the four auxiliary magnets are arranged separately. Around the main magnet 511.
  • the magnetic circuit system 5 further includes a pole core 53 attached to the side of the magnetic steel 51 away from the dome 33.
  • the pole core 53 is made of a magnetically conductive material. The arrangement of the pole core 53 can enhance the magnetic flux, so that the acoustic performance of the speaker can be improved.
  • a groove 8 is recessed on the bottom walls 111 and 131, and the pole core 53 is fixed in the groove 8. This can reduce the size of the speaker in the direction of vibration.

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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。其包括具有收容空间的壳体以及收容于壳体内的振动系统及磁路系统，振动系统将收容空间分隔为前腔和后腔，壳体还具有两个沿振动方向间隔设置的底壁，振动系统沿振动方向的相对两侧分别设有磁路系统，磁路系统固设于底壁上，振动系统包括音圈、球顶及音膜，音圈包括呈环状的主体部及自主体部外侧延伸形成的延伸部，球顶固设于主体部内并将主体部划分为第一部分和第二部分，延伸部和球顶位于同一水平面上，音膜包括折环部、自折环部向外延伸形成的固定部及自折环部向内延伸形成的结合部，固定部固定在壳体上，结合部固定在延伸部沿振动方向的一侧表面上。本发明提供的扬声器可以增大磁通量，从而提升声学性能。

Description

扬声器 技术领域
本发明涉及电声转换领域，尤其涉及一种扬声器。
 背景技术
为适应各种音响设备与信息通信设备的小型化、多功能化发展，要求该类设备中所使用的扬声器对应更加趋于小型化，使所述扬声器与周边其他元件的配合更加紧凑。特别随着移动电话轻薄化发展的需求，对其中所使用的扬声器的质量要求也越来越高。
相关技术中，扬声器的球顶远离磁路，使得音圈不完全位于磁间隙中，从而使得磁通量减小，且球顶上方空间全留给扬声器前腔。
因此，实有必要提供一种新的扬声器解决上述问题。
 技术问题
本发明的目的在于提供一种扬声器，该扬声器可以增大磁通量，从而提升声学性能。
 技术解决方案
本发明提供的扬声器，包括具有收容空间的壳体以及收容于所述壳体内的振动系统及驱动所述振动系统振动发声的磁路系统，所述振动系统将所述收容空间分隔为前腔和后腔，所述前腔与外界连通，所述壳体还具有两个沿振动方向间隔设置的底壁，所述振动系统沿振动方向的相对两侧分别设有所述磁路系统，所述磁路系统固设于所述底壁上，所述振动系统包括音圈、球顶及音膜，所述音圈包括呈环状的主体部及自所述主体部外侧延伸形成的延伸部，所述球顶固设于所述主体部内并将所述主体部划分为第一部分和第二部分，所述延伸部和所述球顶位于同一水平面上，所述音膜包括折环部、自所述折环部向外延伸形成的固定部及自所述折环部向内延伸形成的结合部，所述固定部固定在所述壳体上，所述结合部固定在所述延伸部沿振动方向的一侧表面上。
优选地，所述球顶为由衔铁制成的球顶。
优选地，所述磁路系统包括磁钢，所述磁钢包括与所述球顶相对且间隔设置的主磁钢，所述主磁钢在所述球顶上的正投影位于所述球顶的范围内。
优选地，所述磁钢还包括环绕所述主磁钢设置并与所述主磁钢之间形成磁间隙的副磁钢，所述主磁钢与所述副磁钢的充磁方向相反，所述主体部在所述底壁上的正投影位于所述主磁钢和所述副磁钢之间。
优选地，所述副磁钢呈连续的环状结构。
优选地，所述第一部分和所述第二部分关于所述球顶所在的平面对称分布。
优选地，所述磁路系统还包括贴设于所述磁钢远离所述球顶一侧的极芯。
优选地，所述底壁上凹陷形成有凹槽，所述极芯固设于所述凹槽内。
优选地，所述壳体包括第一壳体及与所述第一壳体围合组配形成所述收容空间的第二壳体，所述第一壳体包括与振动方向垂直的第一底壁、自所述第一底壁周缘向所述第二壳体方向弯折延伸形成的第一侧壁及自所述第一底壁向所述第二壳体方向延伸形成的第一围壁，所述固定部固定在所述第一侧壁和所述第一围壁上，且所述振动系统与所述第一底壁、所述第一侧壁及所述第一围壁围合形成所述前腔。
优选地，所述第一侧壁上设有连通所述前腔和外界的出声孔。
 有益效果
与相关技术相比，本发明提供的扬声器通过在所述振动系统沿振动方向的相对两侧分别设置所述磁路系统，所述振动系统包括音圈、球顶及音膜，所述音圈包括呈环状的主体部及自所述主体部外侧延伸形成的延伸部，所述球顶固设于所述主体部内并将所述主体部划分为第一部分和第二部分，所述延伸部和所述球顶位于同一水平面上，所述音膜包括折环部、自所述折环部向外延伸形成的固定部及自所述折环部向内延伸形成的结合部，所述固定部固定在所述壳体上，所述结合部固定在所述延伸部沿振动方向的一侧表面上，从而使得音圈沿振动方向的相对两侧均具有驱动力（即增加了磁通量），从而提升了扬声器的声学性能。
 附图说明
图1为本发明提供的扬声器一较佳实施例的分解图；
图2为图1所示扬声器另一角度的结构示意图；
图3为图1所示扬声器组装后的立体图；
图4为图3所示扬声器沿A-A方向的剖视图；
图5为图4所示扬声器中壳体的结构示意图；
图6为图4所示扬声器中磁路系统另一实施例的磁极分布示意图；
图7为图3所示扬声器沿B-B方向的剖视图。
 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，所描述的实施例仅仅是本发明一部份实施例，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他实施例，都属于本发明保护的范围。
如图1至图7所示，所述扬声器包括具有收容空间1A的壳体1以及收容于所述壳体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，所述振动系统3将所述收容空间1A分隔为前腔1B和后腔1C，所述前腔1B与外界连通。其中，所述壳体1还具有两个沿振动方向X间隔设置的底壁111、131，所述振动系统3沿振动方向X的相对两侧分别设有所述磁路系统5，所述磁路系统5固设于所述底壁111、131上。其中，所述底壁111、131分别为下述所述的第一底壁111和第二底壁131。
所述壳体1包括第一壳体11及与所述第一壳体11围合组配形成所述收容空间1A的第二壳体13。
所述第一壳体11包括与振动方向X垂直的第一底壁111、自所述第一底壁111周缘向所述第二壳体13方向弯折延伸形成的第一侧壁113及自所述第一底壁111向所述第二壳体13方向延伸形成的第一围壁115，所述振动系统3固定在所述第一侧壁113和所述第一围壁115上，且所述振动系统3与所述第一底壁111、所述第一侧壁113及所述第一围壁115围合形成所述前腔1B。
所述第二壳体13包括与振动方向X垂直的第二底壁131、自所述第二底壁133周缘向所述第一壳体11方向弯折延伸形成的第二侧壁133。
如图2和图4所示，所述第一侧壁113上设有连通所述前腔1B和外界的出声孔7。可以理解的是，在其他实施例中，根据实际使用需求，所述出声孔也可以设置在所述第一底壁上。
所述振动系统3包括音圈31、球顶33及音膜35。所述音圈31包括呈环状的主体部311及自所述主体部311外侧延伸形成的延伸部313，所述球顶33固设于所述主体部311内并将所述主体部311划分为第一部分315和第二部分317，所述延伸部313和所述球顶33位于同一水平面上。所述音膜35包括折环部351、自所述折环部351向外延伸形成的固定部353及自所述折环部353向内延伸形成的结合部355，所述固定部353固定在所述壳体1上，所述结合部355固定在所述延伸部313沿振动方向X的一侧表面上。其中，所述固定部353固定在所述第一侧壁113和所述第一围壁115上。所述音圈31与外部电路连接，所述音圈31通电后，所述音圈31会在所述磁路系统5磁场的作用下振动，而所述音圈31振动会带动所述音膜35振动发声。
在本实施例中，所述球顶33为由衔铁制成的球顶。当所述音圈31通电时，位于所述音圈31内的所述球顶33被所述音圈31的磁场磁化。磁化后的所述球顶33也变成了一个磁体，这样由于所述音圈31的磁场和所述球顶33的磁场互相叠加，从而使所述振动系统3的磁性大大增强，进而可以进一步提升声学性能。
所述磁路系统5包括磁钢51，所述磁钢51包括与所述球顶33相对且间隔设置的主磁钢511，所述主磁钢511在所述球顶33上的正投影位于所述球顶33的范围内。
在本实施例中，所述第一部分315和所述第二部分317关于所述球顶33所在的平面对称分布。这样能够充分利用振动空间，从而有利于减小所述扬声器沿振动方向上的尺寸。
所述磁钢51还包括环绕所述主磁钢511设置并与所述主磁钢511之间形成磁间隙51A的副磁钢513，所述主磁钢511与所述副磁钢513的充磁方向相反，所述主体部311在所述底壁上的正投影位于所述主磁钢511和所述副磁钢513之间。
在本实施例中，所述副磁钢513呈连续的环状结构。当然，作为所述副磁钢的其他实施方式，所述副磁钢也可以设置成间隔设置的分体式结构，例如，所述副磁钢设有四个，四个所述副磁钢分别设于所述主磁钢511的四周。
在本实施例中，所述磁路系统5还包括贴设于所述磁钢51远离所述球顶33一侧的极芯53。所述极芯53由导磁材料制成。所述极芯53的设置可以增强磁通量，从而可以提高扬声器的声学性能。
在本实施例中，所述底壁111、131上凹陷形成有凹槽8，所述极芯53固设于所述凹槽8内。这样可以减小所述扬声器沿振动方向上的尺寸。
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. 一种扬声器，其包括具有收容空间的壳体以及收容于所述壳体内的振动系统及驱动所述振动系统振动发声的磁路系统，所述振动系统将所述收容空间分隔为前腔和后腔，所述前腔与外界连通，所述壳体还具有两个沿振动方向间隔设置的底壁，其特征在于：所述振动系统沿振动方向的相对两侧分别设有所述磁路系统，所述磁路系统固设于所述底壁上，所述振动系统包括音圈、球顶及音膜，所述音圈包括呈环状的主体部及自所述主体部外侧延伸形成的延伸部，所述球顶固设于所述主体部内并将所述主体部划分为第一部分和第二部分，所述延伸部和所述球顶位于同一水平面上，所述音膜包括折环部、自所述折环部向外延伸形成的固定部及自所述折环部向内延伸形成的结合部，所述固定部固定在所述壳体上，所述结合部固定在所述延伸部沿振动方向的一侧表面上。
  2. 根据权利要求1所述的扬声器，其特征在于：所述球顶为由衔铁制成的球顶。
  3. 根据权利要求1所述的扬声器，其特征在于：所述磁路系统包括磁钢，所述磁钢包括与所述球顶相对且间隔设置的主磁钢，所述主磁钢在所述球顶上的正投影位于所述球顶的范围内。
  4. 根据权利要求3所述的扬声器，其特征在于：所述磁钢还包括环绕所述主磁钢设置并与所述主磁钢之间形成磁间隙的副磁钢，所述主磁钢与所述副磁钢的充磁方向相反，所述主体部在所述底壁上的正投影位于所述主磁钢和所述副磁钢之间。
  5. 根据权利要求4所述的扬声器，其特征在于：所述副磁钢呈连续的环状结构。
  6. 根据权利要求3所述的扬声器，其特征在于：所述第一部分和所述第二部分关于所述球顶所在的平面对称分布。
  7. 根据权利要求3或4或5或6所述的扬声器，其特征在于：所述磁路系统还包括贴设于所述磁钢远离所述球顶一侧的极芯。
  8. 根据权利要求7所述的扬声器，其特征在于：所述底壁上凹陷形成有凹槽，所述极芯固设于所述凹槽内。
  9. 根据权利要求1所述的扬声器，其特征在于：所述壳体包括第一壳体及与所述第一壳体围合组配形成所述收容空间的第二壳体，所述第一壳体包括与振动方向垂直的第一底壁、自所述第一底壁周缘向所述第二壳体方向弯折延伸形成的第一侧壁及自所述第一底壁向所述第二壳体方向延伸形成的第一围壁，所述固定部固定在所述第一侧壁和所述第一围壁上，且所述振动系统与所述第一底壁、所述第一侧壁及所述第一围壁围合形成所述前腔。
  10. 根据权利要求9所述的扬声器，其特征在于：所述第一侧壁上设有连通所述前腔和外界的出声孔。
PCT/CN2019/130146 2019-12-30 2019-12-30 扬声器 WO2021134317A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012119933A (ja) * 2010-11-30 2012-06-21 Pioneer Electronic Corp スピーカ装置
CN103167374A (zh) * 2011-12-14 2013-06-19 富电电子（株） 高功率微型扬声器
CN204993820U (zh) * 2015-07-09 2016-01-20 张扬 微型发声器
CN205320280U (zh) * 2015-12-22 2016-06-15 瑞声精密电子沭阳有限公司 振动系统及应用所述振动系统的扬声器
CN206433148U (zh) * 2016-02-19 2017-08-22 苹果公司 扬声器组件和扬声器组件隔膜
KR20190019455A (ko) * 2017-08-17 2019-02-27 주식회사 이엠텍 분할 진동 방지 구조를 구비하는 마이크로스피커

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012119933A (ja) * 2010-11-30 2012-06-21 Pioneer Electronic Corp スピーカ装置
CN103167374A (zh) * 2011-12-14 2013-06-19 富电电子（株） 高功率微型扬声器
CN204993820U (zh) * 2015-07-09 2016-01-20 张扬 微型发声器
CN205320280U (zh) * 2015-12-22 2016-06-15 瑞声精密电子沭阳有限公司 振动系统及应用所述振动系统的扬声器
CN206433148U (zh) * 2016-02-19 2017-08-22 苹果公司 扬声器组件和扬声器组件隔膜
KR20190019455A (ko) * 2017-08-17 2019-02-27 주식회사 이엠텍 분할 진동 방지 구조를 구비하는 마이크로스피커

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