WO2021088913A1 - 一种发声装置 - Google Patents

一种发声装置 Download PDF

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Publication number
WO2021088913A1
WO2021088913A1 PCT/CN2020/126678 CN2020126678W WO2021088913A1 WO 2021088913 A1 WO2021088913 A1 WO 2021088913A1 CN 2020126678 W CN2020126678 W CN 2020126678W WO 2021088913 A1 WO2021088913 A1 WO 2021088913A1
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WO
WIPO (PCT)
Prior art keywords
voice coil
centering
connecting portion
centering support
support piece
Prior art date
Application number
PCT/CN2020/126678
Other languages
English (en)
French (fr)
Inventor
杨健斌
强寿松
刘春发
Original Assignee
歌尔股份有限公司
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.)
Filing date
Publication date
Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Priority to US17/773,421 priority Critical patent/US20220408192A1/en
Publication of WO2021088913A1 publication Critical patent/WO2021088913A1/zh

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    • 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
    • H04R9/041—Centering
    • H04R9/043—Inner suspension or damper, e.g. spider
    • 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
    • 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
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/201—Damping aspects of the outer suspension of loudspeaker diaphragms by addition of additional damping means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the present invention relates to the technical field of electro-acoustic conversion, in particular to a sound generating device.
  • the centering support piece is one of the basic components of the sound device. Its main function is to ensure the correct position of the voice coil in the magnetic gap. When the voice coil is under force, the vibration system only reciprocates in the axial direction and provides the vibration system operation. Elastic force during reciprocating motion.
  • traditional sound generating devices such as loudspeaker devices
  • the centering support piece is elastic; on the one hand, the setting position of the traditional centering support piece cannot be The position of the voice coil in the sounding device is well ensured; on the other hand, the structure of the traditional centering support piece increases the height of the loudspeaker along its vibration direction.
  • the present invention provides a new type of sound generating device.
  • An object of the present invention is to provide a sound generating device.
  • a sound generating device includes a diaphragm and a voice coil that drives the diaphragm to vibrate;
  • At least two sets of centering fins are arranged on the voice coil, and at least two sets of the centering fins are respectively arranged at a first position close to the diaphragm and a second position away from the diaphragm;
  • At least two groups of the centering splints include at least a first centering splint and a second centering splint;
  • the first centering support piece has a first connecting portion and a second connecting portion, the first connecting portion is connected to the voice coil, and the second connecting portion is fixed on the sound generating device;
  • a planar elastic member is provided between the first connecting portion and the second connecting portion, and the planar elastic member is bent and extended from the first connecting portion to the second connecting portion, and is located on the same plane as the first connecting portion Inside;
  • the second centering support piece has a first fixing part and a second fixing part, the first fixing part is connected to the voice coil, and the second fixing part is fixed to the sounding device;
  • a connecting arm is provided between the first fixing part and the second fixing part, and the connecting arm is wave-shaped.
  • the voice coil includes a voice coil body and a skeleton, the voice coil body is wound on the outside of the skeleton and forms a circular tube shape with a height difference with the skeleton;
  • the first position is the side surface of the skeleton
  • the second position is the side surface of the voice coil body close to the end surface thereof.
  • At least one of the first centering branches is fixed at the first position; the first connecting portion of the first centering branch and the first connecting portion of one of the adjacent first centering branches Fixed by connecting bridge;
  • the second centering support piece is fixed at the second position in a segmented manner.
  • the connecting bridge is a convex structure, and the convex structure is attached to the side surface of the voice coil.
  • the second centering support piece is sleeved at the first position; the first centering support piece is uniformly fixed at the second position in an array manner.
  • the sound generating device further includes a housing, and the conductive terminals are configured to be injection molded on the housing;
  • the voice coil is connected to the conductive terminal through a connecting wire.
  • the sound emitting device further includes a basin-shaped U iron, a magnet is arranged in the basin of the U iron, and the voice coil is arranged in the basin of the U iron and is subjected to the magnetic field of the magnet;
  • a gap is provided on the U iron, and a centering branch provided at the second position passes through the gap and is connected to the voice coil.
  • the planar elastic member diffuses outward along the direction of the first connecting portion to the second connecting portion, the planar elastic member forms a diffusion angle, and the diffusion angle is not less than 10°.
  • the first centering support piece is integrally wound by a metal wire.
  • the first centering support piece is formed of any one of phosphor bronze, iron wire, steel wire, and alloy wire; the second centering support piece is made of fiber, cotton cloth, blended fabric, or metal material. Any kind of molding.
  • the resonance frequency F0 of the first centering brace is 50-300 Hz.
  • the present invention provides a sounding device, wherein at least two sets of centering support pieces are arranged on the voice coil of the sounding device; compared with the prior art, the present invention improves the vibration stability of the voice coil in the sounding device .
  • the first centering support piece of the sound generating device of the present invention can be made of metal material, which can optimize the acoustic performance of the product by reducing the resonance frequency and total harmonic distortion.
  • FIG. 1 is a schematic diagram of the structure of the sound generating device according to the first embodiment of the present invention.
  • Fig. 2 is a schematic diagram showing a part of the internal structure of the sound generating device in the first embodiment.
  • FIG. 3 is a schematic diagram of the structure of the sound generating device according to the second embodiment of the present invention.
  • Fig. 4 is a schematic diagram showing a part of the internal structure of the sound generating device in the second embodiment of the present invention.
  • Fig. 5 is an impedance curve diagram when the first centering support piece is provided in the sound generating device of the present invention and only the second centering support piece is used in the prior art.
  • FIG. 6 is a graph showing the distortion curve when the first centering support piece is provided in the sound generating device of the present invention and only the second centering support piece is used in the prior art.
  • any specific value should be construed as merely exemplary, and not as a limitation. Therefore, other examples of the exemplary embodiment may have different values.
  • a sound generating device includes a diaphragm and a voice coil that drives the diaphragm to vibrate;
  • At least two sets of centering fins are arranged on the voice coil, and at least two sets of the centering fins are respectively arranged at a first position close to the diaphragm and a second position away from the diaphragm;
  • At least two groups of the centering splints include at least a first centering splint and a second centering splint;
  • the first centering support piece has a first connecting portion and a second connecting portion, the first connecting portion is connected to the voice coil, and the second connecting portion is fixed on the sound generating device;
  • planar elastic member between the first connecting portion and the second connecting portion, and the planar elastic member is bent and extended from the first connecting portion to the second connecting portion, and is located in the same plane as the first connecting portion;
  • the second centering support piece has a first fixing part and a second fixing part, the first fixing part is connected to the voice coil, and the second fixing part is fixed to the sounding device;
  • a connecting arm is provided between the first fixing part and the second fixing part, and the connecting arm is wave-shaped.
  • the voice coil of the sounding device is provided with at least two sets of centering pieces; compared with the prior art, the present invention improves the stability of the voice coil in the sounding device.
  • the first centering support piece of the sound generating device of the present invention can be made of metal material, which can optimize the acoustic performance of the product by reducing the resonance frequency and total harmonic distortion.
  • FIG. 1 to FIG. 2 are schematic structural diagrams of the sound generating device 100 according to the first embodiment of the present invention.
  • the sound generating device includes a diaphragm and a voice coil that drives the diaphragm to vibrate.
  • the voice coil includes a voice coil body 104 and a skeleton 103.
  • the skeleton 103 is in a circular tube shape.
  • the voice coil body 104 is wound outside the skeleton to form a circular tube shape with a height difference from the skeleton 103. It should be noted that, in this embodiment, only a circular sound emitting device is used as an example for description, but it is not intended to limit the present invention.
  • two sets of centering fins are provided on the voice coil; the two sets of centering fins include a first centering fin 105 and a second centering fin 106.
  • the first centering support piece 105 has a first connecting portion 1051 and a second connecting portion 1053, the first connecting portion 1051 is connected to the voice coil, and the second connecting portion 1053 is fixed on the sound generating device; There is a planar elastic member 1052 between the first connecting portion 1051 and the second connecting portion 1053, and the planar elastic member 1052 is bent and extended from the first connecting portion 1051 to the second connecting portion 1053.
  • the first connecting portion 1051 is connected to the side surface of the frame 103; the second connecting portion 1053 is fixed on the sounding device, wherein the sounding device further includes a housing 101, and the second connecting portion 1053 is fixed to the housing 101 on.
  • a fixing column protrudes from the housing 101, and the second connecting portion 1053 is disposed on the fixing column.
  • the planar elastic member 1052 bends and extends from the first connection portion 1051 to the second connection portion 1053, for example, is S-shaped and extends from the first connection portion 1051 to the second connection portion 1053.
  • the second centering support piece includes a first fixing portion 1061 and a second fixing portion 1063, the first fixing portion 1061 is connected to the voice coil, and the second fixing portion 1063 is fixed on the sound generating device; There is a connecting arm 1062 between the first fixing portion 1061 and the second fixing portion 1063, and the connecting arm 1062 is wave-shaped.
  • the second centering support piece may be an elastic wave.
  • the first centering support piece 105 is fixed at a first position, where the first position is the side surface of the frame 103.
  • the first connecting portion 1051 is connected to the side surface of the frame 103; the second connecting portion 1053 is fixed on the housing 101.
  • a plurality of the first centering support pieces 105 are fixed at the first position.
  • four first centering support pieces are fixed at the first position, and one of the first centering support pieces is adjacent to the first centering support piece 105.
  • the centering support pieces are connected by a connecting bridge 107; the first connecting portions of the other two first centering support pieces are also connected by a connecting bridge.
  • the connecting bridge 107 has a convex structure, and the convex structure is attached to the side surface of the voice coil; specifically, the convex structure is attached to the side surface of the frame 103.
  • the connecting bridge may also have an arc-shaped structure, and the arc-shaped structure is attached to the side surface of the skeleton.
  • a first centering support piece and an adjacent centering support piece are integrally formed with the connecting bridge.
  • the second centering support piece is fixed at a second position, wherein the second position is the side surface of the voice coil body 104 close to its end surface, and the "end surface” is the lower end surface of the voice coil body 103, namely The bottom of the voice coil body 103. Specifically, the second centering support piece is fixed in the second position in a segmented manner.
  • the "segmented method" is formed by dividing the second centering support piece into a plurality of fan-shaped centering support pieces 106, and fixing the plurality of fan-shaped centering support pieces 106 on the voice coil. The side surface of the main body 103 close to its end surface.
  • a plurality of centering support pieces 106 in a fan-shaped structure include a first fixing portion 1061 and a second fixing portion 1063, and a connecting arm 1062 is provided between the first fixing portion 1061 and the second fixing portion 1063. 1062 is wavy.
  • the second centering support piece is formed of any one of fiber, cotton cloth, blended fabric or metal material.
  • the sound generating device further includes a basin-shaped U iron, a magnet is arranged in the basin of the U iron, and the voice coil is arranged in the basin of the U iron and is subjected to the magnetic field of the magnet;
  • a gap is provided on the U iron, and a centering branch provided at the second position passes through the gap and is connected to the voice coil.
  • a plurality of centering support pieces 106 in a fan-shaped structure are configured to be able to pass through the gap and be connected to the side surface of the voice coil body 103 close to the end surface thereof. That is, the notches opened on the U iron form a retreat space, so that a plurality of centering support pieces in a fan-shaped structure can generate vibration along the vibration direction of the sound device.
  • the sound emitting device 100 further includes a housing 101, and the conductive terminal 102 is configured to be injection molded on the housing 101; the voice coil is connected to the conductive terminal 102 through a connecting wire.
  • the connecting wire is a brocade wire.
  • the voice coil of the sounding device is provided with two sets of centering braces, which improves the stability of the voice coil in the sounding device and ensures that the axis of the voice coil and the axis of the sounding device are coaxial without being skewed.
  • FIGS. 3 to 4 are schematic diagrams of the structure of the sound emitting device 200 according to the second embodiment of the present invention.
  • the sound generating device 200 includes a diaphragm and a voice coil that drives the diaphragm to vibrate.
  • the voice coil includes a voice coil body 205 and a skeleton 204.
  • the skeleton 204 is in a circular tube shape.
  • the voice coil body 205 is wound outside the skeleton to form a circular tube shape with a height difference from the skeleton 204.
  • two sets of centering fins are provided on the voice coil; the two sets of centering fins include a first centering fin 206 and a second centering fin 207.
  • the first centering support piece 206 has a first connecting portion 2061 and a second connecting portion 2063, the first connecting portion 2061 is connected to the voice coil, and the second connecting portion 2063 is fixed on the sounding device; There is a planar elastic member 2062 between the first connecting portion 2061 and the second connecting portion 2063, and the planar elastic member 2062 is bent and extended from the first connecting portion 2061 to the second connecting portion 2063.
  • the second centering support piece 207 includes a first fixing portion 2071 and a second fixing portion 2073.
  • the first fixing portion 2071 is connected to the voice coil, and the second fixing portion 2073 is fixed to the sound generating device;
  • the second centering support piece 207 may be an elastic wave.
  • the first centering support piece 206 is fixed at the second position, where the second position is the side surface of the voice coil body 205 close to its end surface, and the "end surface" is the lower end surface of the voice coil body, namely The bottom of the voice coil body.
  • the first centering support piece 206 is uniformly fixed at the second position in an array manner.
  • the first centering support piece 206 is fixed at the second position in an annular array.
  • four first centering fins are provided on the side surface of the voice coil body 205 close to the end surface, and the first connecting portion 2061 of the first centering fin 206 is fixed on the side surface of the voice coil body 205 close to the end surface. ;
  • the second connecting portion 2063 is fixed on the housing of the sounding device.
  • the sound generating device further includes a basin-shaped U iron, a magnet is arranged in the basin of the U iron, and the voice coil is arranged in the basin of the U iron and is subjected to the magnetic field of the magnet;
  • a gap is provided on the U iron, and a centering branch provided at the second position passes through the gap and is connected to the voice coil.
  • a plurality of the first centering support pieces 2061 are configured to be able to pass through the gap and be connected to the side surface of the voice coil body close to the end surface thereof. That is, the notches opened on the U iron form a retreat space, so that the plurality of first centering support pieces can generate vibration along the vibration direction of the sound device.
  • the second centering support piece 207 is fixed at a first position, wherein the first position is the side surface of the frame 204.
  • the first fixing portion 2071 is sleeved on the side surface of the frame 204; the second fixing portion 2073 is fixed on the shell.
  • the second centering support piece 207 is formed of any one of fiber, cotton cloth, blended fabric or metal material.
  • the sound generating device further includes a housing 201, and the conductive terminal 202 is configured to be injection molded on the housing; the voice coil is connected to the conductive terminal 202 through a connecting wire 203.
  • the connecting wire 203 is a brocade wire.
  • the voice coil of the sounding device is provided with two sets of centering pieces, which improves the stability of the voice coil in the sounding device and ensures the axis of the voice coil and the axis of the sounding device Coaxial without skew.
  • the first centering support piece is fixed at the first position or the second position.
  • the planar elastic member diffuses outward along the direction of the first connecting portion to the second connecting portion, the planar elastic member forms a diffusion angle, and the diffusion angle is not less than 10°.
  • the mechanical stiffness value of the first centering brace decreases, and the mechanical stiffness of the first centering brace linearly becomes better.
  • the mechanical stiffness of the first centering support piece ranges from 0.2 to 2 N/mm, and preferably, the mechanical stiffness of the first centering support piece is 0.56 N/mm. Within this range of mechanical stiffness, the performance of the first centering support piece is better, and at the same time it plays a good role in supporting the fixation of the voice coil position.
  • the first centering support piece is integrally wound by a metal wire
  • the metal wire can be any one of phosphor bronze, iron wire, steel wire, and alloy wire.
  • the first centering support piece is integrally wound by a metal wire, so that the diaphragm in the sound device can provide better compliance when vibrating under large displacement, and the process is simple and easy to operate; at the same time, the first centering support
  • the sheet is made of metal material, which makes it less affected by high temperature and high humidity environment, and has excellent fatigue resistance, and also enables the sound device to work in harsh environments.
  • curve b represents the impedance curve using only the traditional centering support piece (that is, the second centering support piece);
  • curve c represents the impedance curve of the first centering support piece provided in the sound generating device of the embodiment of the present invention Impedance curve.
  • the resonance frequency F0 of the sound generating device is 50-300 Hz, and preferably, the resonance frequency F0 is 170 Hz.
  • the resonance frequency F0 of the sound device is 195 Hz. Therefore, when the first centering piece is applied to the sounding device, the sounding device has a good low-frequency response, and the acoustic performance of the sounding device is improved;
  • the first centering support piece is applied to the sounding device, which can reduce the total harmonic distortion THD of the sounding device and improve the acoustic performance of the sounding device.
  • the curve b represents the traditional centering piece applied to the sounding device, the distortion curve of the sounding device, and the curve c represents the first centering piece of the present invention applied to the sounding device, the sounding device Distortion curve.
  • the total harmonic distortion THD of the sound generating device of the present invention is less than 10%; specifically, when the frequency is 100 Hz, the total harmonic distortion THD of the sound generating device is less than 10%; when the frequency is 200 Hz , The total harmonic distortion THD of the sounding device is less than 2.5%; when the frequency is 300Hz, the total harmonic distortion THD of the sounding device is less than 2%;
  • the total harmonic distortion THD of the traditional sounding device is less than 16%; specifically, when the frequency is 100 Hz, the total harmonic distortion THD of the sounding device is less than 16%; When the frequency is 200 Hz, the total harmonic distortion THD of the sounding device is less than 5%; when the frequency is 300 Hz, the total harmonic distortion THD of the sounding device is less than 2.5%;
  • the sound device in this example has good acoustic performance.
  • the invention discloses a sound generating device, wherein at least two sets of centering support pieces are arranged on the voice coil of the sound generating device, which improves the stability of the internal structure of the sound device on the one hand; and improves the acoustic performance of the sound device on the other hand .

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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

本发明公开了一种发声装置。在音圈上设置有至少两组定心支片，至少两组定心支片分别设置在靠近所述振膜的第一位置和远离所述振膜的第二位置；至少两组所述定心支片至少包括第一定心支片和第二定心支片；第一定心支片具有第一连接部和第二连接部，第一连接部连接于所述音圈，第二连接部固定在发声装置上；在第一连接部和第二连接部之间具有平面弹性件，平面弹性件从第一连接部向所述第二连接部弯曲延伸，并且与第一连接部位于同一平面内；第二定心支片具有第一固定部和第二固定部，第一固定部连接于所述音圈，第二固定部固定在发声装置上；本发明发声装置的音圈上设置至少两组定心支片；相对于现有技术，本发明提高了音圈在发声装置内的稳定性。

Description

一种发声装置 技术领域
本发明涉及电声转换技术领域，具体地涉及一种发声装置。
背景技术
定心支片是发声装置的基本构件之一，它的作用主要是确保音圈在磁间隙中的正确位置，保持音圈在受力时，振动系统只沿轴向往复运动和提供振动系统作往复运动时的弹力。
目前传统的发声装置，例如在大喇叭装置中，通常在音圈骨架上固定设置一个定心支片，而且定心支片呈弹波状；一方面传统的定心支片的设置位置并不能够很好的保证音圈在发声装置的位置；另一方面传统的定心支片的结构使得在大喇叭沿其振动方向上的高度增加。
因此为了解决上述的任意技术问题，本发明提供一种新型的发声装置。
发明内容
本发明的一个目的是提供一种发声装置。
根据本发明的一个方面，提供一种发声装置。所述发声装置包括振膜和驱动所述振膜振动的音圈；
在所述音圈上设置有至少两组定心支片，至少两组所述定心支片分别设置在靠近所述振膜的第一位置和远离所述振膜的第二位置；
至少两组所述定心支片至少包括第一定心支片和第二定心支片；
所述第一定心支片具有第一连接部和第二连接部，所述第一连接部连接于所述音圈，第二连接部固定在所述发声装置上；
在所述第一连接部和第二连接部之间具有平面弹性件，所述平面弹性件从第一连接部向所述第二连接部弯曲延伸，并且与所述第一连接部位于同一平面内；
所述第二定心支片具有第一固定部和第二固定部，所述第一固定部连 接于所述音圈，第二固定部固定在所述发声装置上；
所述第一固定部和第二固定部之间具有连接臂，所述连接臂呈波浪形。
可选地，所述音圈包括音圈本体和骨架，所述音圈本体绕制在所述骨架外，与所述骨架形成有高度差的圆管形；
所述第一位置为所述骨架的侧面；
所述第二位置为所述音圈本体的靠近其端面的侧面。
可选地，至少一个所述第一定心支片固定在第一位置；所述第一定心支片的第一连接部与其相邻的其中一个第一定心支片的第一连接部通过连接桥固定；
所述第二定心支片呈分段方式固定在第二位置。
可选地，所述连接桥为凸型结构，所述凸型结构贴合于所述音圈的侧面。
可选地，所述第二定心支片套设在所述第一位置；所述第一定心支片呈阵列方式均匀固定在第二位置。
可选地，所述发声装置还包括壳体，导电端子配置为注塑在所述壳体上；
所述音圈通过连接线与所述导电端子连接。
可选地，所述发声装置还包括盆型的U铁，所述U铁的盆腔内设有磁铁，所述音圈设置在所述U铁的盆腔内并受到所述磁铁的磁场作用；
所述U铁上开设有缺口，在第二位置处设置的定心支片穿过所述缺口连接至所述音圈。
可选地，所述平面弹性件沿第一连接部向第二连接部方向向外扩散，所述平面弹性件形成扩散角度，所述扩散角度不小于10°。
可选地，所述第一定心支片由金属线一体绕制而成。
可选地，所述第一定心支片由磷青铜、铁线、钢线、合金线中的任意一种成型；所述第二定心支片由纤维、棉布、混纺或者金属材料中的任意一种成型。
可选地，所述第一定心支片的谐振频率F0为50～300Hz。
本发明的有益效果：本发明提供一种发声装置，其中发声装置的音圈上设置至少两组定心支片；相对于现有技术，本发明提高了音圈在发声装置内振动的稳定性。
其中本发明发声装置的第一定心支片可选择采用金属材质绕制而成，能够通过降低谐振频率和总谐波失真等优化产品的声学性能。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例，并且连同其说明一起用于解释本发明的原理。
图1所示为本发明第一实施例的发声装置的结构示意图。
图2所示为第一实施例中发声装置的部分内部结构示意图。
图3所示为本发明第二实施例的发声装置的结构示意图。
图4所示为本发明第二实施例中发声装置的部分内部结构示意图。
图5所示为本发明发声装置中设置第一定心支片与现有技术中仅应用第二定心支片时的阻抗曲线图。
图6所示为本发明发声装置中设置第一定心支片与现有技术中仅应用第二定心支片时的失真曲线图。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例 性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
根据本发明的一个实施例，提供一种发声装置。所述发声装置包括振膜和驱动所述振膜振动的音圈；
在所述音圈上设置有至少两组定心支片，至少两组所述定心支片分别设置在靠近所述振膜的第一位置和远离所述振膜的第二位置；
至少两组所述定心支片至少包括第一定心支片和第二定心支片；
所述第一定心支片具有第一连接部和第二连接部，所述第一连接部连接于所述音圈，第二连接部固定在所述发声装置上；
在所述第一连接部和第二连接部之间具有平面弹性件，所述平面弹性件从第一连接部向所述第二连接部弯曲延伸，并且与第一连接部位于同一平面内；
所述第二定心支片具有第一固定部和第二固定部，所述第一固定部连接于所述音圈，第二固定部固定在所述发声装置上；
所述第一固定部和第二固定部之间具有连接臂，所述连接臂呈波浪形。
本例子中，发声装置的音圈上设置至少两组定心支片；相对于现有技术，本发明提高了音圈在发声装置内的稳定性。
其中本发明发声装置的第一定心支片可选择采用金属材质绕制而成，能够通过降低谐振频率和总谐波失真等优化产品的声学性能。
在一个例子中，如图1～图2所示为本发明第一实施例的发声装置100的结构示意图。发声装置包括振膜和驱动所述振膜振动的音圈。
所述音圈包括音圈本体104和骨架103，所述骨架103为圆管形，所述音圈本体104绕制在所述骨架外，形成与所述骨架103具有高度差的圆管形。需要说明的是，本实施方式中仅以圆形的发声装置作为示例进行说明，但并不用于限定本发明。
本例子中音圈上设置有两组定心支片；其中两组定心支片包括第一定心支片105和第二定心支片106。
所述第一定心支片105具有第一连接部1051和第二连接部1053，所述第一连接部1051连接于所述音圈，第二连接部1053固定在所述发声装置上；在所述第一连接部1051和第二连接部1053之间具有平面弹性件1052，所述平面弹性件1052从第一连接部1051向所述第二连接部1053弯曲延伸。
具体地，所述第一连接部1051连接于骨架103的侧面；第二连接部1053固定在所述发声装置上，其中所述发声装置还包括壳体101，第二连接部1053固定在壳体101上。所述壳体101上突出有固定柱，所述第二连接部1053设置在所述固定柱上。
所述平面弹性件1052从第一连接部1051向所述第二连接部1053弯曲延伸，例如从第一连接部1051呈S型向所述第二连接部1053弯曲延伸。
所述第二定心支片包括第一固定部1061和第二固定部1063，所述第一固定部1061连接于所述音圈，第二固定部1063固定在所述发声装置上；所述第一固定部1061和第二固定部1063之间具有连接臂1062，所述连接臂1062呈波浪形。例如所述第二定心支片可以为弹波。
本例子中，第一定心支片105固定在第一位置，其中第一位置为骨架103的侧面。具体地，第一连接部1051连接于骨架103的侧面；第二连接部1053固定在壳体101上。其中在第一位置固定多个所述第一定心支片105，本例子在第一位置固定四个所述第一定心支片，其中一个第一定心支片与其相邻的一个第一定心支片通过连接桥107连接；另外两个第一定心支片的第一连接部也通过连接桥连接。
其中所述连接桥107呈凸型结构，所述凸型结构贴合于所述音圈的侧面；具体地，所述凸型结构贴合于所述骨架103的侧面。
可选地，所述连接桥还可以呈弧形结构，所述弧形结构贴合于所述骨架的侧面。
优选地，一个第一定心支片与其相邻的一个定心支片与连接桥一体成型。
所述第二定心支片固定在第二位置，其中所述第二位置为音圈本体104的靠近其端面的侧面，其中所述“端面”为所述音圈本体103的下端面，即所述音圈本体103的底部。具体地，第二定心支片呈分段方式固定在第二位置。其中“分段方式”的形成方式是：将所述第二定心支片分割成多个呈扇形结构的定心支片106，将多个呈扇形结构的定心支片106固定在音圈本体103的靠近其端面的侧面。其中多个呈扇形结构的定心支片106包括第一固定部1061和第二固定部1063，以及所述第一固定部1061和第二固定部1063之间具有连接臂1062，所述连接臂1062呈波浪形。
优选地，所述第二定心支片由纤维、棉布、混纺或者金属材料中的任意一种成型。
其中，所述发声装置还包括盆型的U铁，所述U铁的盆腔内设有磁铁，所述音圈设置在所述U铁的盆腔内并受到所述磁铁的磁场作用；
所述U铁上开设有缺口，在第二位置处设置的定心支片穿过所述缺口连接至所述音圈。
本例子中，多个呈扇形结构的定心支片106配置为能够穿过所述缺口连接至音圈本体103的靠近其端面的侧面。即U铁上开设的缺口形成避让空间，使得多个呈扇形结构的定心支片能够产生沿发声装置的振动方向的振动。
可选地，所述发声装置100还包括壳体101，导电端子102配置为注塑在所述壳体101上；所述音圈通过连接线与所述导电端子102连接。其中所述连接线为锦丝线。
本例子中，发声装置的音圈上设置两组定心支片，提高了音圈在发声装置内的稳定性，保证了音圈轴线与发声装置的轴线共轴线而不发生歪斜。
在一个例子中，如图3～图4所示为本发明第二实施例的发声装置200的结构示意图。发声装置200包括振膜和驱动所述振膜振动的音圈。
所述音圈包括音圈本体205和骨架204，所述骨架204为圆管形，所述音圈本体205绕制在所述骨架外，形成与所述骨架204具有高度差的圆管形。
本例子中音圈上设置有两组定心支片；其中两组定心支片包括第一定 心支片206和第二定心支片207。
所述第一定心支片206具有第一连接部2061和第二连接部2063，所述第一连接部2061连接于所述音圈，第二连接部2063固定在所述发声装置上；在所述第一连接部2061和第二连接部2063之间具有平面弹性件2062，所述平面弹性件2062从第一连接部2061向所述第二连接部2063弯曲延伸。
所述第二定心支片207包括第一固定部2071和第二固定部2073，所述第一固定部2071连接于所述音圈，第二固定部2073固定在所述发声装置上；所述第一固定部2071和第二固定部2073之间具有连接臂2072，所述连接臂2072呈波浪形。例如所述第二定心支片207可以为弹波。
本例子中，第一定心支片206固定在第二位置，其中第二位置为音圈本体205的靠近其端面的侧面，其中所述“端面”为所述音圈本体的下端面，即所述音圈本体的底部。具体地，所述第一定心支片206呈阵列方式均匀固定在第二位置。本例子中，所述第一定心支片206呈环形阵列固定在第二位置。具体地，在音圈本体205的靠近其端面的侧面设置四个第一定心支片，其中第一定心支片206的第一连接部2061固定在音圈本体205的靠近其端面的侧面；第二连接部2063固定在发声装置的壳体上。
其中，所述发声装置还包括盆型的U铁，所述U铁的盆腔内设有磁铁，所述音圈设置在所述U铁的盆腔内并受到所述磁铁的磁场作用；
所述U铁上开设有缺口，在第二位置处设置的定心支片穿过所述缺口连接至所述音圈。
本例子中，多个所述第一定心支片2061配置为能够穿过所述缺口连接至音圈本体的靠近其端面的侧面。即U铁上开设的缺口形成避让空间，使得多个第一定心支片能够产生沿发声装置的振动方向的振动。
其中，所述第二定心支片207固定在第一位置，其中所述第一位置为骨架204的侧面。具体地，第一固定部2071套设在骨架204的侧面；第二固定部2073固定在壳体上。
优选地，所述第二定心支片207由纤维、棉布、混纺或者金属材料中的任意一种成型。
可选地，所述发声装置还包括壳体201，导电端子202配置为注塑在所述壳体上；所述音圈通过连接线203与所述导电端子202连接。其中所述连接线203为锦丝线。
在一个例子中，如图1～图4所示，发声装置的音圈上设置两组定心支片，提高了音圈在发声装置内的稳定性，保证了音圈轴线与发声装置的轴线共轴线而不发生歪斜。其中第一定心支片固定在第一位置或第二位置。
优选地，所述平面弹性件沿第一连接部向第二连接部方向向外扩散，所述平面弹性件形成扩散角度，所述扩散角度不小于10°。本发明人发现，随着扩散角度的增加，第一定心支片的力学劲度值降低，第一定心支片的力学劲度线性变好。例如，第一定心支片的力学劲度范围为0.2～2N/mm，优选地，第一定心支片的力学劲度为0.56N/mm。在此力学劲度范围内，第一定心支片的性能更加优良，同时对音圈位置的固定起到良好的支持作用。
本例子中，所述第一定心支片由金属线一体绕制而成，其中金属线可以采用磷青铜、铁线、钢线、合金线中的任意一种。其中第一定心支片由金属线一体绕制而成，使得发声装置中的振膜在大位移下振动时能够提供较好的顺性，并且工艺简单、便于操作；同时第一定心支片采用金属材料，使得其受高温高湿环境影响较小，耐疲劳性较优秀，也使得发声装置能够在恶劣环境中工作。
本发明人发现，将所述第一定心支片固定在音圈上，使得发声装置在振动位移较大时，可以具有较好的顺性；同时也能够降低发声装置失真，提高发声装置的声学性能。
具体地，如图5所示，曲线b代表仅应用传统定心支片(即第二定心支片)的阻抗曲线；曲线c代表本发明实施例发声装置中设置第一定心支片的阻抗曲线。
其中，应用第一定心支片时，发声装置的谐振频率F0为50～300Hz，优选地，谐振频率F0为170Hz。其中应用传统的定心支片时，发声装置的谐振频率F0为195Hz。因此当第一定心支片应用到发声装置内，使得发声装置具有良好的低频响应，提高了发声装置的声学性能；
同时第一定心支片应用到发声装置内，能够降低发声装置的总谐波失真 THD，提高发声装置的声学性能。具体地，如图6所示，曲线b代表传统的定心支片应用到发声装置中，发声装置的失真曲线，曲线c代表本发明第一定心支片应用到发声装置中，发声装置的失真曲线。
例如，在100-300Hz频段范围内，本发明发声装置的总谐波失真THD小于10％；具体地，当频率为100Hz时,发声装置的总谐波失真THD小于10％；当频率为200Hz时,发声装置的总谐波失真THD小于2.5％；当频率为300Hz时,发声装置的总谐波失真THD小于2％；
而当发声装置中只设置传统的定心支片时，传统的发声装置的总谐波失真THD小于16％；具体地，当频率为100Hz时,发声装置的总谐波失真THD小于16％；当频率为200Hz时,发声装置的总谐波失真THD小于5％；当频率为300Hz时,发声装置的总谐波失真THD小于2.5％；
因此本例子中发声装置具有良好的声学性能。
本发明公开了一种发声装置，其中在所述发声装置的音圈上设置至少两组定心支片，一方面提高了发声装置内部结构的稳定性；另一方面提高了发声装置的声学性能。
虽然已经通过例子对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (11)

  1. 一种发声装置，其特征在于，所述发声装置包括振膜和驱动所述振膜振动的音圈；在所述音圈上设置有至少两组定心支片，至少两组所述定心支片分别设置在靠近所述振膜的第一位置和远离所述振膜的第二位置；
    至少两组所述定心支片至少包括第一定心支片和第二定心支片；
    所述第一定心支片具有第一连接部和第二连接部，所述第一连接部连接于所述音圈，第二连接部固定在所述发声装置上；在所述第一连接部和第二连接部之间具有平面弹性件，所述平面弹性件从第一连接部向所述第二连接部弯曲延伸，并且与所述第一连接部位于同一平面内；
    所述第二定心支片具有第一固定部和第二固定部，所述第一固定部连接于所述音圈，第二固定部固定在所述发声装置上；所述第一固定部和第二固定部之间具有连接臂，所述连接臂呈波浪形。
  2. 根据权利要求1所述的发声装置，其特征在于，所述音圈包括音圈本体和骨架，所述音圈本体绕制在所述骨架外，与所述骨架形成有高度差；
    所述第一位置为所述骨架的侧面；
    所述第二位置为所述音圈本体的靠近其端面的侧面。
  3. 根据权利要求1或2所述的发声装置，其特征在于，至少一个所述第一定心支片固定在第一位置；所述第一定心支片的第一连接部与其相邻的其中一个第一定心支片的第一连接部通过连接桥固定；
    所述第二定心支片呈分段方式固定在第二位置。
  4. 根据权利要求3所述的发声装置，其特征在于，所述连接桥为凸型结构，所述凸型结构贴合于所述音圈的侧面。
  5. 根据权利要求1或2所述的发声装置，其特征在于，所述第二定心支片套设在所述第一位置；所述第一定心支片呈阵列方式均匀固定在第二位置。
  6. 根据权利要求1所述的发声装置，其特征在于，所述发声装置还包括壳体，导电端子配置为注塑在所述壳体上；
    所述音圈通过连接线与所述导电端子连接。
  7. 根据权利要求1或2所述的发声装置，其特征在于，所述发声装置还包括盆型的U铁，所述U铁的盆腔内设有磁铁，所述音圈设置在所述U铁的盆腔内并受到所述磁铁的磁场作用；
    所述U铁上开设有缺口，在第二位置处设置的定心支片穿过所述缺口连接至所述音圈。
  8. 根据权利要求1所述的发声装置，其特征在于，所述平面弹性件沿第一连接部向第二连接部方向向外扩散，所述平面弹性件形成扩散角度，所述扩散角度不小于10°。
  9. 根据权利要求1所述的发声装置，其特征在于，所述第一定心支片由金属线一体绕制而成。
  10. 根据权利要求1所述的发声装置，其特征在于，所述第一定心支片由磷青铜、铁线、钢线、合金线中的任意一种成型；所述第二定心支片由纤维、棉布、混纺或者金属材料中的任意一种成型。
  11. 根据权利要求1所述的发声装置，其特征在于，所述第一定心支片的谐振频率F0为50～300Hz。
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CN112788504A (zh) * 2019-11-08 2021-05-11 歌尔股份有限公司 一种发声装置
CN112788496A (zh) * 2019-11-08 2021-05-11 歌尔股份有限公司 一种定心支片及发声装置
CN112788503A (zh) * 2019-11-08 2021-05-11 歌尔股份有限公司 一种发声装置和电子终端
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