WO2018040398A1 - 一种动圈式扬声器 - Google Patents

一种动圈式扬声器 Download PDF

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Publication number
WO2018040398A1
WO2018040398A1 PCT/CN2016/111132 CN2016111132W WO2018040398A1 WO 2018040398 A1 WO2018040398 A1 WO 2018040398A1 CN 2016111132 W CN2016111132 W CN 2016111132W WO 2018040398 A1 WO2018040398 A1 WO 2018040398A1
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WO
WIPO (PCT)
Prior art keywords
conductive material
diaphragm
material layer
moving coil
speaker
Prior art date
Application number
PCT/CN2016/111132
Other languages
English (en)
French (fr)
Inventor
曹惠娴
姜舒
杨鑫峰
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 KR1020197007727A priority Critical patent/KR102260112B1/ko
Priority to US16/329,205 priority patent/US20190200137A1/en
Publication of WO2018040398A1 publication Critical patent/WO2018040398A1/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/007—Protection circuits for transducers
    • 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • 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
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
    • H04R29/003—Monitoring arrangements; Testing arrangements for loudspeakers of the moving-coil type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006—Interconnection of transducer parts

Definitions

  • the present invention relates to an electroacoustic conversion device, and more particularly to a moving coil speaker.
  • the voice coil working under low frequency conditions will produce excessive displacement, while the excessive displacement will cause the distortion to rise sharply, and even the obvious voice coil and magnetic circuit system will be rubbed, which will cause the speaker Irreversible damage.
  • the current solution is to use an intelligent power amplifier control unit to control the power fed to the speaker product, and to reduce the power when the speaker vibration displacement exceeds a predetermined level.
  • This requires knowledge of the vibration displacement of the speaker.
  • a voice coil using a speaker and an external circuit are used as sensors, and real-time measurement of the speaker model and real-time monitoring of the input signal are performed to monitor the vibration displacement of the speaker.
  • the premise of this solution is to assume that the speaker has a theoretical model, such as diaphragm stiffness coefficient Kms, vibration system mass Mms, force drive factor Bl, damping factor Rms, DC impedance Re, inductance Le, and so on.
  • a moving coil speaker including a vibration system and a magnetic circuit system located below the vibration system;
  • the vibration system includes a diaphragm, a centering piece, and a voice coil that are joined together from top to bottom, and the diaphragm includes a diaphragm body portion with a folding ring and a center coupled to the lower portion of the diaphragm body portion a diaphragm reinforcement portion of the position; wherein the diaphragm reinforcement portion includes a first conductive material layer, the centering support sheet includes a second conductive material layer, the diaphragm reinforcement portion and the centering branch Bonding between sheets by an insulating adhesive;
  • the magnetic circuit system includes a center washer, a center magnet, and a yoke that are joined together from top to bottom;
  • the first conductive material layer and the second conductive material layer are used as a movable plate, and the center washer, the center magnet, and the yoke are used as a fixed plate to form a vibration displacement for detecting the moving coil speaker.
  • Capacitor structure
  • the yoke is a basin
  • the fixed plate is connected to an external circuit through a bottom of the basin.
  • the center washer, the center magnet and the yoke are bonded and fixed by a conductive adhesive or an insulating adhesive.
  • a moving coil type speaker comprising a front cover, a vibration system, and a magnetic circuit system in order from top to bottom;
  • the front cover includes a third conductive material layer
  • the vibration system includes a diaphragm, a centering piece, and a voice coil that are joined together from top to bottom, and the diaphragm includes a diaphragm body portion with a folding ring and a center coupled to the lower portion of the diaphragm body portion a diaphragm reinforcement portion of the position; wherein the diaphragm reinforcement portion includes a first conductive material layer, the centering support sheet includes a second conductive material layer, the diaphragm reinforcement portion and the centering branch Bonding between sheets by an insulating adhesive;
  • the magnetic circuit system includes a center washer, a center magnet, and a yoke that are joined together from top to bottom;
  • the first conductive material layer and the second conductive material layer serve as a movable electrode plate, and the third conductive material layer functions as a fixed electrode plate, and constitutes a capacitor structure for detecting a vibration displacement of the moving coil speaker.
  • the front cover is provided with a front cover pad, and the front cover pad is provided with a connection terminal, and the fixed electrode plate is connected to the external circuit through the connection terminal.
  • the centering piece is a flexible circuit board.
  • the movable plate is connected to an external circuit through the centering piece.
  • the centering piece is a central hollow structure.
  • the area of the first conductive material layer is larger than the area of the second conductive material layer.
  • the moving coil speaker further includes a housing that houses the vibration system and the magnetic circuit system, and an edge of the centering piece is fixed to the housing.
  • the moving coil speaker of the present invention provides a capacitor structure for detecting the actual vibration displacement of the vibration system, and the capacitor structure can be used for real-time and accurate detection of the vibration displacement of the moving coil speaker product.
  • FIG. 1 is a schematic cross-sectional view of a moving coil speaker according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a moving coil speaker according to a second embodiment of the present invention.
  • FIG 3 is a cross-sectional view showing a moving coil type speaker according to a third embodiment of the present invention.
  • FIG. 4 is a cross-sectional view showing a moving coil speaker according to a fourth embodiment of the present invention.
  • Dynamic coil loudspeakers typically include a vibrating system, a magnetic circuit system, and a housing that houses a vibrating system including a diaphragm and a voice coil coupled to one side of the diaphragm.
  • the magnetic circuit system typically includes a washer and a magnet. And a magnetic yoke, the voice coil is suspended in a magnetic gap formed by the magnetic circuit system.
  • the diaphragm generally includes a diaphragm body portion and a diaphragm reinforcement portion coupled to a side of the diaphragm body portion.
  • the diaphragm body portion generally has a folding ring, and a fixing portion for fixing to the housing is disposed at a periphery of the folding ring.
  • the diaphragm reinforcement can be, for example, DOME.
  • the magnetic circuit system may be a dual magnetic circuit structure, the magnet including a central magnet disposed at a central position of the yoke and a side magnet surrounding the central magnet, the wavy including a center waist corresponding to the central magnet and surrounding The edge of the central Huashi, the integral structure of the central magnet and the central huasi and the integral structure of the side magnet and the edge huasi are provided with a magnetic gap, and the voice coil is disposed in the magnetic gap.
  • the magnetic yoke may be a basin frame, and a central magnet is disposed at a center of the bottom of the basin frame, and a center washer is disposed corresponding to the central magnet, and the central magnet and the central structure of the center washer are interposed between the base frame and the basin frame.
  • a magnetic gap is provided, and the voice coil is disposed in the magnetic gap.
  • the invention designs a capacitor structure for detecting the actual vibration displacement of the moving coil type speaker vibration system, and the capacitor is composed of a movable plate and a fixed plate opposite to the movable plate, wherein the movable plate is a vibration system. A part vibrates with the vibration system. When the vibration system vibrates, the distance between the movable plate and the fixed plate changes, thereby causing a change in the capacitance of the capacitor, monitoring the change in the capacitance of the capacitor or monitoring the current change of the circuit connected to the capacitor. The actual vibration displacement of the vibration system can be calculated.
  • FIG. 1 the structure of the moving coil speaker provided by the first embodiment of the present invention is illustrated:
  • the moving coil speaker includes a vibration system, a magnetic circuit system located below the vibration system, and a housing that houses the vibration system and the magnetic circuit system.
  • the vibration system includes a diaphragm that is joined together from top to bottom, a centering piece 13, and a voice coil 16.
  • the diaphragm includes a diaphragm body portion 15 having a folded ring and a diaphragm reinforcing portion 11 coupled to a central position below the diaphragm body portion 15.
  • the center of the centering piece 13 is a hollow structure, and the edge of the centering piece 13 is fixed to the casing.
  • the diaphragm reinforcement portion 11 includes a first conductive material layer, and the centering support sheet 13 includes a second conductive material layer.
  • the diaphragm reinforcement portion 11 and the centering support sheet 13 are bonded by a conductive adhesive 12, And the conductive adhesive 12 turns on the first conductive material layer and the second conductive material layer.
  • the diaphragm reinforcing portion 11 as a whole may be made of a conductive material, for example, the diaphragm reinforcing portion 11 is made of a metal material.
  • the magnetic circuit system includes a center washer 18, a center magnet 19, and a basin frame 17 that are joined together from top to bottom, and the three are bonded together by a conductive adhesive.
  • the first conductive material layer and the second conductive material layer together serve as a movable plate, and the center washer 18, the center magnet 19, and the basin frame 17 together serve as a fixed plate, and constitute a capacitor for detecting the vibration displacement of the moving coil speaker. structure.
  • the diaphragm reinforcing portion 11 has a first conductive material layer, and the first conductive material layer and the second conductive material layer are connected by the conductive adhesive 12, and the first conductive material layer and the first conductive material layer The two conductive material layers together form a movable plate, which increases the area of the movable plate, thereby increasing the capacitance of the capacitor structure and improving the sensitivity of the capacitor structure.
  • the voice coil 16 drives the diaphragm and the centering piece 13 to vibrate together, thereby causing a change in the capacitance of the movable plate and the fixed plate.
  • the actual value of the vibration system can be calculated by calculating the change value of the capacitor.
  • the actual displacement of the vibration system can also be calculated by indirectly monitoring the current change of the circuit connected to the capacitor.
  • the smart power amplifier control unit can be connected to the capacitor to monitor the actual displacement of the vibration system and reduce the input power of the moving coil speaker when needed to protect the moving coil speaker from being too distorted or physically damaged.
  • the wire 101 can be drawn from the bottom of the basin frame 17, so that the fixed plate can be connected to the external circuit through the bottom of the basin frame 17.
  • the centering piece 13 is a flexible circuit board, and the wire 102 can be led out from the edge of the centering piece 13, so that the movable plate is grounded or connected to an external circuit through the centering piece 13, and the capacitance detecting chip can be placed at The flexible circuit board.
  • the centering slabs serve multiple functions simultaneously, reducing the number of components required for the speaker product, thereby reducing cost and reducing the space requirements for product design.
  • the centering piece itself has the function of maintaining the concentric vibration of the vibrating parts of the vibration system, reducing the polarization, and then the centering piece as a part of the movable plate can be used to detect the vibration displacement of the vibration system, and at the same time, centering
  • the support piece can feed back the electrical signal of the capacitor to the external detection system.
  • the acoustic performance of the speaker can be adjusted by selecting different materials for the diaphragm reinforcement, especially in the high frequency range.
  • the acoustics of the speaker can also be adjusted by designing the size of the central hollow portion of the centering segment. performance.
  • the magnetic circuit system may also be the aforementioned dual magnetic circuit structure, with the center washer, the center magnet, and the yoke closest to the vibration system as the fixed plates.
  • FIG. 2 the structure of the moving coil speaker provided by the second embodiment of the present invention is illustrated:
  • the moving coil speaker includes a vibration system, a magnetic circuit system located below the vibration system, and a housing that houses the vibration system and the magnetic circuit system.
  • the vibration system includes a diaphragm that is joined together from top to bottom, a centering piece 23, and a voice coil 26.
  • the diaphragm includes a diaphragm body portion 25 having a folded ring and a diaphragm reinforcing portion 21 coupled to a center position below the diaphragm body portion 25.
  • the center of the centering piece 23 is a hollow structure, and the edge of the centering piece 23 is fixed to the casing.
  • the diaphragm reinforcement portion 21 includes a first conductive material layer, and the centering support sheet 23 includes a second conductive material layer.
  • the diaphragm reinforcement portion 21 and the centering support sheet 23 are bonded by an insulating adhesive 22 therebetween. together.
  • the diaphragm reinforcing portion 21 as a whole may be made of a conductive material, for example, the diaphragm reinforcing portion 21 is made of a metal material.
  • the magnetic circuit system includes a central huasi 28 and a central magnet 29 that are joined together from top to bottom. And the basin frame 27, the three are bonded together by a conductive adhesive.
  • the first conductive material layer and the second conductive material layer serve as movable plates, and the center washer 28, the center magnet 29, and the basin frame 27 serve as fixed plates, and constitute a capacitor structure for detecting vibration displacement of the moving coil speaker.
  • the diaphragm reinforcing portion 21 has a first conductive material layer, and the first conductive material layer and the second conductive material layer together serve as a movable plate.
  • the capacitance structure is The capacitance value will be relatively large. After actual testing, the capacitance of this structure is very sensitive, which can well meet the requirement of detecting the vibration displacement of the speaker.
  • the wire 201 can be drawn from the bottom of the basin frame 27 so that the fixed plate can be connected to the external circuit through the bottom of the basin frame 27.
  • the centering piece 23 is a flexible circuit board, and the wire 202 can be taken out from the edge of the centering piece 23, so that the movable plate is grounded or connected to an external circuit through the centering piece 23, and the capacitance detecting chip can be disposed at The flexible circuit board.
  • the centering slabs serve multiple functions simultaneously, reducing the number of components required for the speaker product, thereby reducing cost and reducing the space requirements for product design.
  • the centering piece itself has the function of maintaining the concentric vibration of the vibrating parts of the vibration system, reducing the polarization, and then the centering piece as a part of the movable plate can be used to detect the vibration displacement of the vibration system, and at the same time, centering
  • the support piece can feed back the electrical signal of the capacitor to the external detection system.
  • the acoustic performance of the speaker can be adjusted by selecting different materials for the diaphragm reinforcement, especially in the high frequency range.
  • the acoustics of the speaker can also be adjusted by designing the size of the central hollow portion of the centering segment. performance.
  • the insulating adhesive is selected to bond the diaphragm reinforcing portion and the centering piece together, and the conductive adhesive is used in the same manner as the first embodiment, and the sensitive capacitor structure can also be realized and increased.
  • An optional range of adhesives are optionally used.
  • FIG. 3 the structure of the moving coil speaker provided by the third embodiment of the present invention is illustrated:
  • the moving coil speaker includes, in order from top to bottom, a front cover, a vibration system, and a magnetic circuit system, and the moving coil type speaker further includes a housing that is coupled with the front cover.
  • the vibration system includes a diaphragm that is joined together from top to bottom, a centering piece 33, and a voice coil 36.
  • the diaphragm includes a diaphragm body portion 35 having a folded ring and a diaphragm reinforcing portion 31 coupled to a center position below the diaphragm body portion 35.
  • the center of the centering piece 33 is a hollow structure, and the edge of the centering piece 33 is fixed to the casing.
  • the diaphragm reinforcement portion 31 includes a first conductive material layer, and the centering support sheet 33 includes a second conductive material layer, and the diaphragm reinforcement portion 31 and the centering support sheet 33 are bonded together.
  • the diaphragm reinforcing portion 31 as a whole may be made of a conductive material, for example, the diaphragm reinforcing portion 31 is made of a metal material.
  • the magnetic circuit system includes a center washer 38, a center magnet 39, and a basin frame 37 that are joined together from top to bottom.
  • the front cover includes a third layer of conductive material, that is, at least a portion of the front cover is made of a conductive material, for example, the lower surface of the front cover is a metal plate 30.
  • the front cover is entirely made of a conductive material, for example, the front cover is a single piece of metal plate.
  • the first conductive material layer and the second conductive material layer together serve as a movable plate, and the third conductive material layer serves as a fixed plate, and constitutes a capacitor structure for detecting a vibration displacement of the moving coil speaker.
  • the diaphragm reinforcing portion 31 and the centering support piece 33 may be bonded by a conductive adhesive as in the first embodiment, and the conductive adhesive turns on the first conductive material layer and the second conductive material.
  • the material layer may be bonded to the diaphragm reinforcing portion 31 and the centering piece 33 by an insulating adhesive as in the second embodiment.
  • a front cover pad may be provided on the front cover, a terminal is provided on the front cover pad, and the wire 302 is taken out from the terminal to connect the fixed plate to an external circuit.
  • the centering piece 33 is a flexible circuit board, and the wire 301 can be drawn from the edge of the centering piece 33 such that the movable plate is grounded or connected to an external circuit through the centering piece 33, and the capacitance detecting chip can be disposed at The flexible circuit board.
  • the centering pieces simultaneously serve multiple functions, which can reduce the speaker product Parts are needed to reduce costs and reduce space requirements for product design.
  • the centering piece itself has the function of maintaining the concentric vibration of the vibrating parts of the vibration system, reducing the polarization, and then the centering piece as a part of the movable plate can be used to detect the vibration displacement of the vibration system, and at the same time, centering
  • the support piece can feed back the electrical signal of the capacitor to the external detection system.
  • the acoustic performance of the speaker can be adjusted by selecting different materials for the diaphragm reinforcement, especially in the high frequency range.
  • the acoustics of the speaker can also be adjusted by designing the size of the central hollow portion of the centering segment. performance.
  • FIG. 4 the structure of the moving coil speaker provided by the fourth embodiment of the present invention is illustrated:
  • the moving coil speaker includes a front cover, a vibration system, and a magnetic circuit system in order from top to bottom, and the moving coil type speaker further includes a housing that is coupled with the front cover.
  • the vibration system includes a diaphragm that is joined together from top to bottom, a centering piece 43, and a voice coil 46.
  • the diaphragm includes a diaphragm body portion 45 having a folded ring and a diaphragm reinforcing portion 41 coupled to a center position below the diaphragm body portion 45.
  • the center of the centering piece 43 is a hollow structure, and the edge of the centering piece 43 is fixed to the casing.
  • the diaphragm reinforcing portion 41 includes a first conductive material layer, and the centering piece 43 includes a second conductive material layer, and the diaphragm reinforcing portion 41 and the centering piece 43 are bonded together.
  • the diaphragm reinforcing portion 41 as a whole may be made of a conductive material, for example, the diaphragm reinforcing portion 41 is made of a metal material.
  • the magnetic circuit system includes a center washer 48, a center magnet 49, and a basin frame 47 that are bonded together from top to bottom.
  • the front cover includes a third layer of conductive material, that is, at least a portion of the front cover is made of a conductive material, for example, the lower surface of the front cover is a metal plate 40.
  • the front cover is entirely made of a conductive material, for example, the front cover is a single piece of metal plate.
  • the first conductive material layer and the second conductive material layer together serve as a movable plate, and the third conductive material layer serves as a first fixed plate, and the central washer 48, the center magnet 49, and the basin frame 47 collectively serve as a second fixed plate.
  • the first fixed plate, the movable plate, and the second fixed plate constitute a capacitor structure for detecting a vibration displacement of the moving coil speaker.
  • the diaphragm reinforcing portion 41 and the centering piece 43 may be bonded by a conductive adhesive as in the first embodiment, and the conductive adhesive turns on the first conductive material layer and the second conductive material.
  • the material layer may be bonded to the diaphragm reinforcing portion 41 and the centering piece 43 by an insulating adhesive as in the second embodiment.
  • a front cover pad may be provided on the front cover, a terminal is provided on the front cover pad, and the wire 401 is taken out from the terminal to connect the first fixed plate to an external circuit.
  • the bonding of the three can be conducted through the conductive adhesive, and the wire 403 can be led out from the bottom of the basin frame 47, so that the second fixed plate can be It is connected to an external circuit through the bottom of the basin frame 47.
  • the centering piece 43 is a flexible circuit board which can be grounded or connected to an external circuit by the centering piece 43.
  • the wires 402 and 404 can be drawn from the edge of the centering piece 43 such that the first capacitive structure composed of the first fixed plate and the movable plate can feed back signals to the external circuit through the wire 401 and the wire 402, the second fixed plate
  • the second capacitor structure composed of the movable plate can feed back the signal to the external capacitor through the wire 403 and the wire 404.
  • the capacitance detecting chip may be disposed on the flexible circuit board.
  • the centering slabs serve multiple functions simultaneously, reducing the number of components required for the speaker product, thereby reducing cost and reducing the space requirements for product design.
  • the centering piece itself has the function of maintaining the concentric vibration of the vibrating parts of the vibration system, reducing the polarization, and then the centering piece as a part of the movable plate can be used to detect the vibration displacement of the vibration system, and at the same time, centering
  • the support piece can feed back the electrical signal of the capacitor to the external detection system.
  • the acoustic performance of the speaker can be adjusted by selecting different materials for the diaphragm reinforcement, especially in the high frequency range.
  • the acoustics of the speaker can also be adjusted by designing the size of the central hollow portion of the centering segment. performance.
  • the embodiment fully utilizes the structural characteristics of the speaker and its system, and designs two fixed plates to further improve the sensitivity of the capacitor structure and increase the space utilization, which is beneficial to the integration of the speaker and other functional blocks.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
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  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

本发明公开了动圈式扬声器，包括振动系统和位于振动系统下方的磁路系统；振动系统包括自上而下结合在一起的振膜、定心支片、以及音圈，振膜包括带有折环的振膜本体部和结合于振膜本体部下方中心位置的振膜补强部；振膜补强部包括第一导电材料层，定心支片包括第二导电材料层，振膜补强部和定心支片之间通过绝缘粘接剂粘接；磁路系统包括自上而下结合在一起的中心华司、中心磁铁、以及导磁轭；第一导电材料层和第二导电材料层作为可动极板，中心华司、中心磁铁、导磁轭作为固定极板，构成用于检测动圈式扬声器的振动位移的电容结构。利用本发明的提供的电容结构可以对动圈式扬声器产品的振动位移进行监测。 (图2)

Description

一种动圈式扬声器 技术领域
本发明涉及电声转换装置，更具体的，涉及一种动圈式扬声器。
背景技术
现有技术中，扬声器在工作于低频条件下时，限制产品最大功率应用的问题主要在于：
大功率下，工作于低频条件下的音圈会产生过大的位移，而过大的位移会导致失真急剧升高，甚至出现明显的音圈与磁路系统的擦碰，这会对扬声器造成不可逆的损伤。
对于这一问题，目前的解决方案是采用智能功放控制单元控制馈给扬声器产品的功率，在扬声器振动位移超出预定程度时降低功率。这需要获知扬声器的振动位移，现有技术中，有使用扬声器的音圈以及外部电路作为传感器，通过扬声器模型的实时测量以及对输入信号的实时监控，实现对扬声器振动位移的监控。此种解决方案的前提是假设扬声器有一个理论模型，比如振膜劲度系数Kms，振动系统质量Mms，力电驱动因数Bl，阻尼因数Rms，直流阻抗Re，电感Le等。
但是，理论的扬声器模型与实际产品之间仍然具有一定的差异，导致扬声器位移监控的准确度有限，这制约了扬声器的低频性能，并影响工作于低频条件下扬声器大功率下性能的优化。
发明内容
本发明的目的是提供一种动圈式扬声器，且该扬声器具有可用于检测所述动圈式扬声器的振动位移的电容结构。
根据本发明的第一方面，提供了一种动圈式扬声器，所述动圈式扬声器包括振动系统和位于所述振动系统下方的磁路系统；
所述振动系统包括自上而下结合在一起的振膜、定心支片、以及音圈，所述振膜包括带有折环的振膜本体部和结合于所述振膜本体部下方中心位置的振膜补强部；其中，所述振膜补强部包括第一导电材料层，所述定心支片包括第二导电材料层，所述振膜补强部和所述定心支片之间通过绝缘粘接剂粘接；
所述磁路系统包括自上而下结合在一起的中心华司、中心磁铁、以及导磁轭；
所述第一导电材料层和第二导电材料层作为可动极板，所述中心华司、中心磁铁、导磁轭作为固定极板，构成用于检测所述动圈式扬声器的振动位移的电容结构。
优选地，所述导磁轭为盆架，所述固定极板通过所述盆架的底部连接至外部电路。
优选地，所述中心华司、中心磁铁以及导磁轭通过导电粘结剂或绝缘粘接剂粘接固定。
根据本发明的第二方面，提供了一种动圈式扬声器，所述动圈式扬声器自上至下依次包括前盖、振动系统、以及磁路系统；
所述前盖包括第三导电材料层；
所述振动系统包括自上而下结合在一起的振膜、定心支片、以及音圈，所述振膜包括带有折环的振膜本体部和结合于所述振膜本体部下方中心位置的振膜补强部；其中，所述振膜补强部包括第一导电材料层，所述定心支片包括第二导电材料层，所述振膜补强部和所述定心支片之间通过绝缘粘接剂粘接；
所述磁路系统包括自上而下结合在一起的中心华司、中心磁铁、以及导磁轭；
所述第一导电材料层和第二导电材料层作为可动极板，所述第三导电材料层作为固定极板，构成用于检测所述动圈式扬声器的振动位移的电容结构。
可选地，所述前盖上设置有前盖焊盘，所述前盖焊盘上设有接线端子，所述固定极板通过所述接线端子连接至外部电路。
可选地，所述定心支片为柔性线路板。
可选地，所述可动极板通过所述定心支片连接到外部电路。
可选地，所述定心支片为中心镂空结构。
可选地，所述第一导电材料层的面积大于所述第二导电材料层的面积。
可选地，所述动圈式扬声器还包括容纳所述振动系统和所述磁路系统的壳体，所述定心支片的边缘与所述壳体固定。
本发明的动圈式扬声器，提供了用于检测振动系统实际振动位移的电容结构，利用该电容结构可以对动圈式扬声器产品的振动位移进行实时的、精确的检测。
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是本发明第一实施例提供的动圈式扬声器的剖面示意图。
图2是本发明第二实施例提供的动圈式扬声器的剖面示意图。
图3是本发明第三实施例提供的动圈式扬声器的剖面示意图。
图4是本发明第四实施例提供的动圈式扬声器的剖面示意图。
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，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。
首先，需要说明的是，本发明的“下方”、“自上而下”、“上表面”、“下表面”等术语仅仅表示了扬声器各部件之间的相对位置关系，当对扬声器进行翻转或旋转时，这一相对位置关系可能会发生颠倒或变化。
动圈式扬声器通常包括振动系统、磁路系统、以及容纳振动系统和磁路系统的壳体，振动系统包括振膜和结合于振膜一侧的音圈，磁路系统通常包括华司、磁铁、以及导磁轭，音圈悬置于磁路系统形成的磁间隙中。所述振膜通常包括振膜本体部和结合于振膜本体部一侧的振膜加强部，振膜本体部通常具有折环，在折环的外围设有用于和壳体固定的固定部，振膜加强部可以例如为DOME。所述磁路系统可以为双磁路结构，所述磁铁包括设置于导磁轭的中心位置的中心磁铁以及围绕中心磁铁的边磁铁，所述华司包括与中心磁铁对应的中心华司和围绕中心华司的边华司，所述中心磁铁、中心华司的一体结构与所述边磁铁、边华司的一体结构之间设置有磁间隙，所述音圈设置于该磁间隙内。或者，所述导磁轭可以为盆架，在盆架底部的中心位置设有中心磁铁，与中心磁铁对应设置有中心华司，所述中心磁铁、中心华司的一体结构与盆架之间设置有磁间隙，所述音圈设置于该磁间隙内。
本发明设计了用于检测动圈式扬声器振动系统实际振动位移的电容结构，该电容由可动极板和与可动极板相对的固定极板组成，其中，可动极板为振动系统的一部分随振动系统一起振动。当振动系统振动时，可动极板与固定极板之间的距离产生变化，从而导致该电容的容值发生变化，监控该电容的容值变化或者监控与该电容相连的电路的电流变化即可计算出振动系统的实际振动位移。
<实施例一>
参见图1所示说明本发明第一实施例提供的动圈式扬声器的结构：
动圈式扬声器包括振动系统、位于振动系统下方的磁路系统、以及容纳所述振动系统和所述磁路系统的壳体。
所述振动系统包括自上而下结合在一起的振膜、定心支片13、以及音圈16。所述振膜包括带有折环的振膜本体部15和结合于振膜本体部15下方中心位置的振膜补强部11。定心支片13的中心为镂空结构，定心支片13的边缘与壳体固定。其中，振膜补强部11包括第一导电材料层，定心支片13包括第二导电材料层，振膜补强部11和定心支片13之间通过导电粘接剂12粘接，并且导电粘接剂12导通第一导电材料层和第二导电材料层。优选的，振膜补强部11整体都可以由导电材料制成，例如，振膜补强部11由金属材质制成。
所述磁路系统包括自上而下结合在一起的中心华司18、中心磁铁19、以及盆架17，三者之间通过导电粘接剂粘接在一起。
第一导电材料层和第二导电材料层共同作为可动极板，中心华司18、中心磁铁19、盆架17共同作为固定极板，构成用于检测该动圈式扬声器的振动位移的电容结构。
由于定心支片13一般为镂空结构，第二导电材料层的面积会比较小，如果仅仅由第二导电材料层作为可动极板，则构成的电容结构的容值会非常小，在检测时容易不灵敏。所以，在本实施例中，振膜补强部11具有第一导电材料层，通过导电粘接剂12连接导通第一导电材料层和第二导电材料层，由第一导电材料层和第二导电材料层共同构成可动极板，增大了可动极板的面积，从而加大了电容结构的容值，提高了电容结构的灵敏性。
当通电的音圈16在磁路系统的作用下振动时，音圈16带动振膜和定心支片13一起振动，从而导致可动极板和固定极板组成的电容发生变化，通过监控该电容的变化数值就可以计算出振动系统的实际位移，也可以间接监控与该电容相连的电路的电流变化计算出振动系统的实际位移。可以利用智能功放控制单元与该电容相连，以监控振动系统的实际位移并在需要时减小动圈式扬声器的输入功率，保护动圈式扬声器不会过于失真或者受到物理损伤。
由于中心华司18、中心磁铁19、盆架17均为导体，可以从盆架17的底部引出导线101，使得固定极板可以通过盆架17的底部连接至外部电路。定心支片13为柔性线路板，可以从定心支片13的边缘引出导线102，使得可动极板通过定心支片13接地或者连接到外部电路，并且，可以将电容检测芯片设置在该柔性线路板上。
在这一实施例中，定心支片同时起到多重作用，能够减少扬声器产品所需部件，从而降低成本，并且减少产品设计的空间需求。具体来说，定心支片本身具有保持振动系统振动部件同心振动，减少偏振的作用，然后定心支片作为可动极板的一部分，能够用于检测振动系统的振动位移，同时，定心支片作为电连接结构，能够将电容的电信号反馈到外部检测系统。
本实施例在满足电容传感器可动极板设计要求的同时，给扬声器声学性能调节引入更多的可调节项。具体来说，可以通过为振膜补强部选择不同的材料，来调节扬声器的声学性能，特别是高频域性能；还可以通过设计定心支片的中心镂空部分的大小来调节扬声器的声学性能。
在另一实施例中，磁路系统还可以为前述的双磁路结构，由最接近振动系统的中心华司、中心磁铁、以及导磁轭作为固定极板。
<实施例二>
参见图2所示说明本发明第二实施例提供的动圈式扬声器的结构：
动圈式扬声器包括振动系统、位于振动系统下方的磁路系统、以及容纳所述振动系统和所述磁路系统的壳体。
所述振动系统包括自上而下结合在一起的振膜、定心支片23、以及音圈26。所述振膜包括带有折环的振膜本体部25和结合于振膜本体部25下方中心位置的振膜补强部21。定心支片23的中心为镂空结构，定心支片23的边缘与壳体固定。其中，振膜补强部21包括第一导电材料层，定心支片23包括第二导电材料层，振膜补强部21和定心支片23之间通过绝缘粘接剂22粘接在一起。优选的，振膜补强部21整体都可以由导电材料制成，例如，振膜补强部21由金属材质制成。
所述磁路系统包括自上而下结合在一起的中心华司28、中心磁铁29、 以及盆架27，三者之间通过导电粘接剂粘接在一起。
第一导电材料层和第二导电材料层作为可动极板，中心华司28、中心磁铁29、盆架27作为固定极板，构成用于检测该动圈式扬声器的振动位移的电容结构。
由于定心支片23一般为镂空结构，第二导电材料层的面积会比较小，如果仅仅由第二导电材料层作为可动极板，则构成的电容结构的容值会非常小，在检测时容易不灵敏。所以，在本实施例中，振膜补强部21具有第一导电材料层，由第一导电材料层和第二导电材料层共同作为可动极板，从电容的基本原理可知，虽然振膜补强部21与定心支片23之间没有导通，由于振膜补强部21与定心支片23的距离很近，并且第一导电材料层的面积比较大，所以该电容结构的容值会比较大，经过实际测试发现，这种结构的电容非常灵敏，能够很好的满足检测扬声器的振动位移的需求。
由于中心华司28、中心磁铁29、盆架27均为导体，可以从盆架27的底部引出导线201，使得固定极板可以通过盆架27的底部连接至外部电路。定心支片23为柔性线路板，可以从定心支片23的边缘引出导线202，使得可动极板通过定心支片23接地或者连接到外部电路，并且，可以将电容检测芯片设置在该柔性线路板上。
在这一实施例中，定心支片同时起到多重作用，能够减少扬声器产品所需部件，从而降低成本，并且减少产品设计的空间需求。具体来说，定心支片本身具有保持振动系统振动部件同心振动，减少偏振的作用，然后定心支片作为可动极板的一部分，能够用于检测振动系统的振动位移，同时，定心支片作为电连接结构，能够将电容的电信号反馈到外部检测系统。
本实施例在满足电容传感器可动极板设计要求的同时，给扬声器声学性能调节引入更多的可调节项。具体来说，可以通过为振膜补强部选择不同的材料，来调节扬声器的声学性能，特别是高频域性能；还可以通过设计定心支片的中心镂空部分的大小来调节扬声器的声学性能。
本实施例中，选中绝缘粘接剂将振膜补强部和定心支片粘结在一起，相对于第一实施例采用导电粘接剂的方式，同样能够实现灵敏的电容结构，并且增加了粘接剂的可选范围。
<实施例三>
参见图3所示说明本发明第三实施例提供的动圈式扬声器的结构：
动圈式扬声器自上至下依次包括前盖、振动系统、磁路系统，该动圈式扬声器还包括与所述前盖结合在一起的壳体。
所述振动系统包括自上而下结合在一起的振膜、定心支片33、以及音圈36。所述振膜包括带有折环的振膜本体部35和结合于振膜本体部35下方中心位置的振膜补强部31。定心支片33的中心为镂空结构，定心支片33的边缘与壳体固定。其中，振膜补强部31包括第一导电材料层，定心支片33包括第二导电材料层，振膜补强部31和定心支片33粘接在一起。优选的，振膜补强部31整体都可以由导电材料制成，例如，振膜补强部31由金属材质制成。
所述磁路系统包括自上而下结合在一起的中心华司38、中心磁铁39、以及盆架37。
所述前盖包括第三导电材料层，即，前盖的至少一部分是由导电材料制成，例如前盖的下表面为金属板30。可选的，前盖整体都是由导电材料制成，例如，前盖为一整块金属板。
第一导电材料层和第二导电材料层共同作为可动极板，第三导电材料层作为固定极板，构成用于检测该动圈式扬声器的振动位移的电容结构。
其中，振膜补强部31和定心支片33之间可以像第一实施例一样，通过导电粘接剂粘接，并且所述导电粘接剂导通第一导电材料层和第二导电材料层，也可以像第二实施例一样，通过绝缘粘接剂粘接振膜补强部31和定心支片33。
在这一实施例中，可以在前盖上设置前盖焊盘，在前盖焊盘上设置接线端子，从接线端子引出导线302，从而将固定极板连接至外部电路。定心支片33为柔性线路板，可以从定心支片33的边缘引出导线301，使得可动极板通过定心支片33接地或者连接到外部电路，并且，可以将电容检测芯片设置在该柔性线路板上。
在这一实施例中，定心支片同时起到多重作用，能够减少扬声器产品所 需部件，从而降低成本，并且减少产品设计的空间需求。具体来说，定心支片本身具有保持振动系统振动部件同心振动，减少偏振的作用，然后定心支片作为可动极板的一部分，能够用于检测振动系统的振动位移，同时，定心支片作为电连接结构，能够将电容的电信号反馈到外部检测系统。
本实施例在满足电容传感器可动极板设计要求的同时，给扬声器声学性能调节引入更多的可调节项。具体来说，可以通过为振膜补强部选择不同的材料，来调节扬声器的声学性能，特别是高频域性能；还可以通过设计定心支片的中心镂空部分的大小来调节扬声器的声学性能。
<实施例四>
参见图4所示说明本发明第四实施例提供的动圈式扬声器的结构：
动圈式扬声器包括自上至下依次包括前盖、振动系统、磁路系统，该动圈式扬声器还包括与所述前盖结合在一起的壳体。
所述振动系统包括自上而下结合在一起的振膜、定心支片43、以及音圈46。所述振膜包括带有折环的振膜本体部45和结合于振膜本体部45下方中心位置的振膜补强部41。定心支片43的中心为镂空结构，定心支片43的边缘与壳体固定。其中，振膜补强部41包括第一导电材料层，定心支片43包括第二导电材料层，振膜补强部41和定心支片43粘接在一起。优选的，振膜补强部41整体都可以由导电材料制成，例如，振膜补强部41由金属材质制成。
所述磁路系统包括自上而下粘结在一起的中心华司48、中心磁铁49、以及盆架47。
所述前盖包括第三导电材料层，即，前盖的至少一部分是由导电材料制成，例如前盖的下表面为金属板40。可选的，前盖整体都是由导电材料制成，例如，前盖为一整块金属板。
第一导电材料层和第二导电材料层共同作为可动极板，第三导电材料层作为第一固定极板，中心华司48、中心磁铁49、盆架47共同作为第二固定极板，第一固定极板、可动极板、以及第二固定极板构成用于检测所述动圈式扬声器的振动位移的电容结构。
其中，振膜补强部41和定心支片43之间可以像第一实施例一样，通过导电粘接剂粘接，并且所述导电粘接剂导通第一导电材料层和第二导电材料层，也可以像第二实施例一样，通过绝缘粘接剂粘接振膜补强部41和定心支片43。
在这一实施例中，可以在前盖上设置前盖焊盘，在前盖焊盘上设置接线端子，从接线端子引出导线401，从而将第一固定极板连接至外部电路。
由于中心华司48、中心磁铁49、盆架47均为导体，三者的粘接可以通过导电粘结剂实现导通，可以从盆架47的底部引出导线403，使得第二固定极板可以通过盆架47的底部连接至外部电路。在另一个实施例中，也可以类似可动极板使用绝缘粘结剂粘结的原理，采用绝缘粘结剂粘接中心华司48、中心磁铁49、盆架47，依然通过盆架47的底部连接至外部电路。
定心支片43为柔性线路板，可动极板可以通过定心支片43接地或连接至外部电路。可以从定心支片43的边缘引出导线402和404，使得第一固定极板和可动极板组成的第一电容结构可以通过导线401和导线402向外部电路反馈信号，第二固定极板和可动极板组成的第二电容结构可以通过导线403和导线404向外部电容反馈信号。其中，电容检测芯片可以设置在该柔性线路板上。
在这一实施例中，定心支片同时起到多重作用，能够减少扬声器产品所需部件，从而降低成本，并且减少产品设计的空间需求。具体来说，定心支片本身具有保持振动系统振动部件同心振动，减少偏振的作用，然后定心支片作为可动极板的一部分，能够用于检测振动系统的振动位移，同时，定心支片作为电连接结构，能够将电容的电信号反馈到外部检测系统。
本实施例在满足电容传感器可动极板设计要求的同时，给扬声器声学性能调节引入更多的可调节项。具体来说，可以通过为振膜补强部选择不同的材料，来调节扬声器的声学性能，特别是高频域性能；还可以通过设计定心支片的中心镂空部分的大小来调节扬声器的声学性能。
本实施例充分利用扬声器及其系统的结构特点，设计两个固定极板，进一步提升了电容结构的灵敏度，增加空间利用率，有利于扬声器与其他功能块进行集成。
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 (10)

  1. 一种动圈式扬声器，其特征在于，所述动圈式扬声器包括振动系统和位于所述振动系统下方的磁路系统；
    所述振动系统包括自上而下结合在一起的振膜、定心支片、以及音圈，所述振膜包括带有折环的振膜本体部和结合于所述振膜本体部下方中心位置的振膜补强部；其中，所述振膜补强部包括第一导电材料层，所述定心支片包括第二导电材料层，所述振膜补强部和所述定心支片之间通过绝缘粘接剂粘接；
    所述磁路系统包括自上而下结合在一起的中心华司、中心磁铁、以及导磁轭；
    所述第一导电材料层和第二导电材料层作为可动极板，所述中心华司、中心磁铁、导磁轭作为固定极板，构成用于检测所述动圈式扬声器的振动位移的电容结构。
  2. 根据权利要求1所述的动圈式扬声器，其特征在于，所述导磁轭为盆架，所述固定极板通过所述盆架的底部连接至外部电路。
  3. 根据权利要求1或2任一项所述的动圈式扬声器，其特征在于，所述中心华司、中心磁铁以及导磁轭通过导电粘结剂或绝缘粘接剂粘接固定。
  4. 一种动圈式扬声器，其特征在于，所述动圈式扬声器自上至下依次包括前盖、振动系统、以及磁路系统；
    所述前盖包括第三导电材料层；
    所述振动系统包括自上而下结合在一起的振膜、定心支片、以及音圈，所述振膜包括带有折环的振膜本体部和结合于所述振膜本体部下方中心位置的振膜补强部；其中，所述振膜补强部包括第一导电材料层，所述定心支片包括第二导电材料层，所述振膜补强部和所述定心支片之间通过绝缘粘接剂粘接；
    所述磁路系统包括自上而下结合在一起的中心华司、中心磁铁、以及导磁轭；
    所述第一导电材料层和第二导电材料层作为可动极板，所述第三导电 材料层作为固定极板，构成用于检测所述动圈式扬声器的振动位移的电容结构。
  5. 根据权利要求4所述的动圈式扬声器，其特征在于，所述前盖上设置有前盖焊盘，所述前盖焊盘上设有接线端子，所述固定极板通过所述接线端子连接至外部电路。
  6. 根据权利要求1-5任一项所述的动圈式扬声器，其特征在于，所述定心支片为柔性线路板。
  7. 根据权利要求1-6任一项所述的动圈式扬声器，其特征在于，所述可动极板通过所述定心支片连接到外部电路。
  8. 根据权利要求1-7任一项所述的动圈式扬声器，其特征在于，所述定心支片为中心镂空结构。
  9. 根据权利要求1-8任一项所述的动圈式扬声器，其特征在于，所述第一导电材料层的面积大于所述第二导电材料层的面积。
  10. 根据权利要求1-9任一项所述的动圈式扬声器，其特征在于，所述动圈式扬声器还包括容纳所述振动系统和所述磁路系统的壳体，所述定心支片的边缘与所述壳体固定。
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