WO2020140165A1 - 扬声器单体 - Google Patents

扬声器单体 Download PDF

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Publication number
WO2020140165A1
WO2020140165A1 PCT/CN2018/125925 CN2018125925W WO2020140165A1 WO 2020140165 A1 WO2020140165 A1 WO 2020140165A1 CN 2018125925 W CN2018125925 W CN 2018125925W WO 2020140165 A1 WO2020140165 A1 WO 2020140165A1
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WIPO (PCT)
Prior art keywords
diaphragm
side wall
clamp plate
speaker unit
magnetic circuit
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Ceased
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PCT/CN2018/125925
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English (en)
French (fr)
Inventor
廖焕彬
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AAC Technologies Holdings Shenzhen Co Ltd
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AAC Acoustic Technologies Shenzhen Co Ltd
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Priority to PCT/CN2018/125925 priority Critical patent/WO2020140165A1/zh
Publication of WO2020140165A1 publication Critical patent/WO2020140165A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

Definitions

  • the invention relates to the technical field of electroacoustic conversion, in particular to a speaker unit in the field of electroacoustic conversion.
  • An object of the present invention is to provide a speaker unit that can solve the problem of improving the sensitivity of the entire speaker unit.
  • a speaker unit includes a basin holder with a storage space, a magnetic circuit system and a vibration system accommodated in the basin holder, the magnetic circuit system includes a lower clamp plate and is attached to the The magnet part of the lower splint, the vibration system includes an upper diaphragm fixed to the basin frame, a voice coil fixed to the side of the upper diaphragm facing the magnetic circuit system, and a voice coil connected to the voice coil and fixed to
  • the lower splint includes a first side oppositely disposed and a second side opposite to the first side and oppositely disposed, the lower splint includes a side along the first side A notch formed by being recessed into the middle region, the lower splint includes a first side wall extending from the edge of the notch toward the lower diaphragm, and the lower diaphragm is provided to avoid the passage of the first side wall mouth.
  • the lower splint includes a second side wall that extends from the first side toward the upper diaphragm, and the second side wall is spaced apart from the first side wall.
  • the magnet portion includes a first magnet portion provided at a central position of the lower splint and second magnet portions provided on both sides of the first magnet portion.
  • the second magnet portion extends along the Set on the second side.
  • the first magnet portion includes a first side surface parallel to the first side, and a distance between the first side wall and the first side surface is smaller than that of the second side wall and the The spacing of the first side.
  • the notch is located in the middle of the first side.
  • it further includes a flexible circuit board located under the lower diaphragm.
  • the beneficial effect of the present invention is that the speaker monomer of the present invention adopts a shaped lower plate to cooperate with the lower diaphragm structure provided with an opening, so that it can not only ensure the suppression effect of the lower diaphragm on swing, but also can improve the short axis of the speaker monomer
  • the strength of the magnetic field which in turn enhances the overall sensitivity of the speaker unit, is conducive to the development of thinner speaker units.
  • FIG. 1 is an exploded schematic view of the speaker unit of the present invention
  • FIG. 2 is a schematic diagram of the assembly structure of the speaker unit of the present invention.
  • FIG. 3 is a schematic cross-sectional view of the speaker unit shown in FIG. 2 taken along line A-A;
  • FIG. 4 is a schematic cross-sectional view of the speaker unit shown in FIG. 2 along line B-B;
  • FIG. 5 is a schematic structural view of the lower splint, the lower diaphragm, and the first magnet part in FIG. 1.
  • a speaker unit 100 includes a basin holder 1 with a storage space 1, a magnetic circuit system 2 housed in the basin holder 1, and vibration System 3;
  • the magnetic circuit system 2 includes a lower clamp 5 and a main magnet 21 and a secondary magnet 23 attached to the lower clamp 5, the number of the secondary magnets 23 is two, and two secondary magnets 23 Located on opposite sides of the main magnet 21; a first magnetic gap is formed between the main magnet 21 and the auxiliary magnet 23;
  • the magnetic circuit system 2 further includes a main pole core 22 disposed on the main magnet 21, and The secondary pole core 24 is arranged around the primary pole core 22, and the secondary pole core 24 is fixed on the pot holder 1.
  • the vibration system 3 includes an upper diaphragm 31 fixed to the top of the basin frame 1, a lower diaphragm 34, and a voice coil inserted into the first magnetic gap and driving the upper diaphragm 31 and the lower diaphragm 34 to vibrate 33, and the flexible circuit board 4 located below the lower diaphragm 34, the upper diaphragm 31 and the lower diaphragm 34 are fixedly connected to the top and bottom ends of the voice coil 33 to vibrate with the voice coil 33, the flexible circuit The board 4 is electrically connected to the voice coil 33.
  • the upper diaphragm 31 is also covered with a dome 32.
  • the voice coil 33 has a frame structure, and in this embodiment is a frame structure with a rectangular cross section, including two longitudinal sides/long sides and two lateral sides/short sides; as shown in FIG. 5, the main magnetic steel 21 It is preferably a rectangular parallelepiped structure including a pair of longitudinal side walls/long side walls and a pair of lateral side walls/short side walls in the circumferential direction.
  • the two longitudinal sides of the voice coil 33 are respectively located in two first magnetic gaps formed between the longitudinal side wall of the main magnet 21 and the two pair of magnets 23.
  • the main magnetic steel 21 and the auxiliary magnetic steel 23 are polarized in the axial direction, and the polarization directions are opposite.
  • the secondary pole core 24, the secondary magnetic steel 23, and the lower clamping plate 5 return to the main magnetic steel 21.
  • the main magnetic steel 21 and the auxiliary magnetic steel 23 are made of permanent magnetic material
  • the main pole core 22, the auxiliary pole core 24 and the lower clamping plate 5 are made of magnetic conductive material such as carbon steel.
  • the lower diaphragm 34 can serve as a “sway suppression unit” to suppress the swing of the speaker itself. Due to the presence of the lower diaphragm 34 in the “sway suppression unit”, the original five-magnetic-circuit speaker can only be designed as a three-magnetic circuit at most, so that the overall magnetic field strength (full-band sensitivity) of the speaker will be reduced; The main reason is the short-axis borderless magnetism, and the gap between the lower clamping plate 5 and the voice coil 33 is large, resulting in a small contribution of the magnetic field strength at the short axis of the voice coil 33, so that the sensitivity of the speaker is not very high.
  • the lower splint 5 has a flat plate shape and includes a bottom plate 51 and a first side wall 52 extending upward from one side of the bottom plate 51.
  • the lower diaphragm 34 is provided with a through hole 35 corresponding to the first side wall 52.
  • the first side wall 52 passes through the through hole 35 and forms a second magnetic gap between the short side wall of the main magnetic steel 21, and the voice coil
  • the two short sides of 33 are respectively located in the two second magnetic gaps, so that the short sides of the voice coil 33 can be subjected to a relatively strong magnetic field.
  • the width of the first side wall 52 should be slightly smaller than the length of the opening 35; this can effectively use the space therein.
  • the plane of the top of the first side wall 52 is higher than the plane of the top of the main magnet 21, that is, the height of the first side wall 52 in the vertical direction Not lower than the height of the main magnet 21.
  • the plane of the top of the first side wall 52 is flush with the top surface of the main pole core 22, so that the magnetic field generated by the main magnetic steel 21 can be effectively guided through the short side of the voice coil 33.
  • the lower splint 5 includes a second side wall 53 extending from the first side toward the upper diaphragm 31, and the second side wall 53 is spaced apart from the first side wall 52 .
  • the magnet portion includes a main magnet 21 provided at the center of the lower splint 5 and auxiliary magnets 23 provided on both sides of the main magnet 21, the auxiliary magnets 23 are provided along the second side .
  • the main magnetic steel 21 includes a first side parallel to the first side, and a distance between the first side wall 52 and the first side is smaller than that between the second side wall 53 and the first side spacing. The notch is in the middle of the first side.
  • the beneficial effect of the present invention is that the speaker unit 100 of the present invention adopts the shaped lower splint 5 to cooperate with the structure of the lower diaphragm 34 provided with a through hole, so that it can not only ensure the suppression effect of the lower diaphragm 34 on swing, but also can improve
  • the magnetic field strength of the short axis of the speaker unit 100, thereby enhancing the overall sensitivity of the speaker unit 100, is beneficial to the development of the speaker unit 100 to be thin.

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

Abstract

本发明提供了一种扬声器单体，包括具有收容空间的盆架、收容于盆架内的磁路系统和振动系统，磁路系统包括下夹板及贴设于下夹板的磁体部，振动系统包括固定于盆架的上振膜、固定于上振膜朝向磁路系统一侧的音圈以及与音圈连接且固定于盆架的下振膜，下夹板包括相对设置的第一侧边以及连接第一侧边且相对设置的第二侧边，下夹板包括沿第一侧边向中间区域凹陷形成的缺口部，下夹板包括自缺口部边缘朝向下振膜弯折延伸的第一侧壁，下振膜设置避让第一侧壁的通口。本发明的扬声器单体采用异形处理的下夹板配合设置有开口的下振膜结构，使得既能够保证下振膜对摇摆的抑制作用，同时能提升扬声器单体短轴的磁场强度。

Description

扬声器单体 【技术领域】
本发明涉及电声转化技术领域，尤其涉及电声转换领域中的扬声器单体。
【背景技术】
现有技术的微型扬声器的发展愈发趋向于超薄化、大Xmax应用等方面,大Xmax应用，则要求扬声器本体的灵敏度高，且抗摇摆的能力强，并且目前常用的三磁路SLS扬声器整体灵敏度会较五磁路扬声器低，需提升当前三磁路SLS扬声器的灵敏度。
因此，有必要提供一种新型的三磁路SLS扬声器设计，在保证单体摇摆的同时，提升其整体的灵敏度。
【发明内容】
本发明的目的在于提供一种扬声器单体，其能解决提高扬声器单体整体的灵敏度的问题。
本发明的技术方案如下：一种扬声器单体，包括具有收容空间的盆架、收容于所述盆架内的磁路系统和振动系统，所述磁路系统包括下夹板及贴设于所述下夹板的磁体部，所述振动系统包括固定于所述盆架的上振膜、固定于所述上振膜朝向所述磁路系统一侧的音圈以及与所述音圈连接且固定于所述盆架的下振膜，所述下夹板包括相对设置的第一侧边以及连接所述第一侧边且相对设置的第二侧边，所述下夹板包括沿所述第一侧边向中间区域凹陷形成的缺口部，所述下夹板包括自所述缺口部边缘朝向所述下振膜弯折延伸的第一侧壁，所述下振膜设置避让所述第一侧壁的通口。
作为本发明的优选，所述下夹板包括自所述第一侧边朝向所述上振膜弯折延伸的第二侧壁，所述第二侧壁与所述第一侧壁间隔设置。
作为本发明的优选，所述磁体部包括设于所述下夹板中央位置的第一 磁体部以及设于所述第一磁体部两侧的第二磁体部，所述第二磁体部沿所述第二侧边设置。
作为本发明的优选，所述第一磁体部包括平行于所述第一侧边的第一侧面，所述第一侧壁与所述第一侧面的间距小于所述第二侧壁与所述第一侧面的间距。
作为本发明的优选，所述缺口部位于所述第一侧边中间。
作为本发明的优选，所述第二侧壁为两个，两个所述第二侧壁设于所述第一侧壁两边。
作为本发明的优选，还包括位于所述下振膜下方的柔性电路板。
本发明的有益效果在于：本发明的扬声器单体采用异形处理的下夹板配合设置有开口的下振膜结构，使得既能够保证下振膜对摇摆的抑制作用，同时能提升扬声器单体短轴的磁场强度，进而提升扬声器单体的整体灵敏度，有利于扬声器单体薄型化发展。
【附图说明】
图1为本发明的扬声器单体的分解示意图；
图2为本发明的扬声器单体的组装结构示意图；
图3为图2所示扬声器单体沿A-A线的剖面示意图；
图4为图2所示扬声器单体沿B-B线的剖面示意图；
图5为图1中的下夹板、下振膜和第一磁体部的结构示意图。
附图标记：100、扬声器单体；1、盆架；2、磁路系统；21、主磁钢；22、主极芯；23、副磁钢；24、副极芯；3、振动系统；31、上振膜；32、球顶；33、音圈；34、下振膜；35、通口；4、柔性电路板；5、下夹板；51、下夹板底板；52、第一侧壁；53、第二侧壁。
【具体实施方式】
下面结合附图和实施方式对本发明作进一步说明。
如图1、图2、图3和图4所示，依照本发明一实施例的扬声器单体100包括具有收容空间的盆架1、收容于所述盆架1内的磁路系统2和振动系统3；所述磁路系统2包括下夹板5及贴设于所述下夹板5的主磁钢21 和副磁钢23，副磁钢23的数量为两个，且两个副磁钢23分别位于主磁钢21相对的两侧；主磁钢21和副磁钢23之间形成第一磁间隙；所述磁路系统2还包括设置于主磁钢21上的主极芯22，以及环绕主极芯22设置的副极芯24，且所述副极芯24固定于盆架1上。
所述振动系统3包括固设于所述盆架1顶部的上振膜31、下振膜34和插入所述第一磁间隙并驱动所述上振膜31和下振膜34振动的音圈33，及位于所述下振膜34下方的柔性电路板4，上振膜31和下振膜34分别固定连接至音圈33的顶端和底端从而可随音圈33振动，所述柔性电路板4与音圈33电连接。上振膜31处还盖设有球顶32。
优选地，音圈33为框形结构，在本实施例中为截面为长方形的框形结构，包括两纵向边/长边和两横向边/短边；如图5所示，主磁钢21优选为长方体结构，沿周向包括一对纵向侧壁/长侧壁和一对横向侧壁/短侧壁。音圈33的两纵向边分别位于主磁钢21的纵向侧壁与两副磁钢23之间形成的两个第一磁间隙内。在本实施例中，主磁钢21和副磁钢23皆沿轴向极化，且极化方向相反，磁力线从主磁钢21出来后，经过主极芯22、音圈33的纵向边、副极芯24、副磁钢23、下夹板5后回到主磁钢21。主磁钢21和副磁钢23由永磁材料制成，主极芯22、副极芯24及下夹板5由导磁材料如碳钢制成。
下振膜34可以作为“摇摆抑制单元”来抑制扬声器自身的摇摆。由于“摇摆抑制单元”中的下振膜34的存在，导致原五磁路的扬声器最多只能设计成三磁路，使得扬声器整体的磁场强度(全频带灵敏度)会降低；其灵敏度降低的其主要是短轴无边磁，且下夹板5与音圈33之间间隙较大，造成音圈33短轴处的磁场强度贡献较小，从而使得扬声器的灵敏度不是很高。
为了解决这样的困境，在本实施例中，通过对扬声器单体100下夹板5做异形处理来解决上述问题。如图1和图5所示，具体的结构如下，下夹板5为平板状，包括底板51、从底板51的一侧向上延伸的第一侧壁52。同时，下振膜34对应第一侧壁52处设置有通口35，第一侧壁52穿过所 述通口35与主磁钢21的短侧壁之间形成第二磁间隙，音圈33的两短边分别位于两第二磁间隙内，从而使得音圈33的短边能够受到比较强的磁场作用。第一侧壁52的宽度应该略小于通口35的长度；这样能够有效的利用其内的空间。
将下振膜34的中间部分挖空，从而使得下夹板5中的一部分可穿过下振膜34到达对应主磁钢21横向侧壁的位置，从而既保证下振膜34对摇摆的抑制作用，同时又能提升单体短轴磁场强度(短轴磁间隙过大导致磁场强度较低)，既而提升扬声器单体100整体的磁场强度及整体灵敏度。在竖直方向也即音圈33的轴向上，所述第一侧壁52顶部所在平面高于主磁钢21顶部所在平面，也即是第一侧壁52在竖直方向上的高度要不低于主磁钢21的高度。优选地，所述第一侧壁52顶部所在平面与主极芯22的顶面平齐，从而可有效地将主磁钢21产生的磁场引导经过音圈33的短边。
优选地，所述下夹板5包括自所述第一侧边朝向所述上振膜31弯折延伸的第二侧壁53，所述第二侧壁53与所述第一侧壁52间隔设置。所述磁体部包括设于所述下夹板5中央位置的主磁钢21以及设于所述主磁钢21两侧的副磁钢23，所述副磁钢23沿所述第二侧边设置。所述主磁钢21包括平行于所述第一侧边的第一侧面，所述第一侧壁52与所述第一侧面的间距小于所述第二侧壁53与所述第一侧面的间距。所述缺口部于所述第一侧边中间。所述第二侧壁53为两个，两个所述第二侧壁53设于所述第一侧壁52两边。
当音圈33中通入电流时，处于所述磁间隙中的音圈33会因为磁场的作用产生运动，随着电流的变化，这种运动也会随之发生变化，从而带动所述振膜上下振动，导致声音的产生。
本发明的有益效果在于：本发明的扬声器单体100采用异形处理的下夹板5配合设置有通口的下振膜34结构，使得既能够保证下振膜34对摇摆的抑制作用，同时能提升扬声器单体100短轴的磁场强度，进而提升扬声器单体100的整体灵敏度，有利于扬声器单体100薄型化发展。
需要说明的是，本发明中所有方向性指示(诸如上、下、内、外、顶 部、底部……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
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 (7)

  1. 一种扬声器单体，包括具有收容空间的盆架、收容于所述盆架内的磁路系统和振动系统，所述磁路系统包括下夹板及贴设于所述下夹板的磁体部，所述振动系统包括固定于所述盆架的上振膜、固定于所述上振膜朝向所述磁路系统一侧的音圈以及与所述音圈连接且固定于所述盆架的下振膜，其特征在于，所述下夹板包括相对设置的第一侧边以及连接所述第一侧边且相对设置的第二侧边，所述下夹板包括沿所述第一侧边向中间区域凹陷形成的缺口部，所述下夹板包括自所述缺口部边缘朝向所述下振膜弯折延伸的第一侧壁，所述下振膜设置避让所述第一侧壁的通口。
  2. 根据权利要求1所述的扬声器单体，其特征在于，所述下夹板包括自所述第一侧边朝向所述上振膜弯折延伸的第二侧壁，所述第二侧壁与所述第一侧壁间隔设置。
  3. 根据权利要求2所述的扬声器单体，其特征在于，所述磁体部包括设于所述下夹板中央位置的第一磁体部以及设于所述第一磁体部两侧的第二磁体部，所述第二磁体部沿所述第二侧边设置。
  4. 根据权利要求2所述的扬声器单体，其特征在于，所述第一磁体部包括平行于所述第一侧边的第一侧面，所述第一侧壁与所述第一侧面的间距小于所述第二侧壁与所述第一侧面的间距。
  5. 根据权利要求2所述的扬声器单体，其特征在于，所述缺口部位于所述第一侧边中间。
  6. 根据权利要求4所述的扬声器单体，其特征在于，所述第二侧壁为两个，两个所述第二侧壁设于所述第一侧壁两边。
  7. 根据权利要求1-6中任意一项所述的扬声器单体，其特征在于：还包括位于所述下振膜下方的柔性电路板。
PCT/CN2018/125925 2018-12-30 2018-12-30 扬声器单体 Ceased WO2020140165A1 (zh)

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WO2023002139A1 (fr) 2021-07-22 2023-01-26 Centre National De La Recherche Scientifique Pseudo-substrat epitaxie piezoelectrique, utilisation et procede de preparation d'un tel pseudo-substrat
WO2024018032A1 (fr) 2022-07-21 2024-01-25 Centre National De La Recherche Scientifique Microsysteme electromecanique sous forme de membrane resonante piezoelectrique a base d'une couche de quartz-alpha et procede de fabrication

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WO2023002139A1 (fr) 2021-07-22 2023-01-26 Centre National De La Recherche Scientifique Pseudo-substrat epitaxie piezoelectrique, utilisation et procede de preparation d'un tel pseudo-substrat
WO2024018032A1 (fr) 2022-07-21 2024-01-25 Centre National De La Recherche Scientifique Microsysteme electromecanique sous forme de membrane resonante piezoelectrique a base d'une couche de quartz-alpha et procede de fabrication

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