WO2018170945A1 - 动磁式扬声器 - Google Patents

动磁式扬声器 Download PDF

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Publication number
WO2018170945A1
WO2018170945A1 PCT/CN2017/078757 CN2017078757W WO2018170945A1 WO 2018170945 A1 WO2018170945 A1 WO 2018170945A1 CN 2017078757 W CN2017078757 W CN 2017078757W WO 2018170945 A1 WO2018170945 A1 WO 2018170945A1
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WO
WIPO (PCT)
Prior art keywords
magnet
voice coil
motor
vibrator
speaker according
Prior art date
Application number
PCT/CN2017/078757
Other languages
English (en)
French (fr)
Inventor
汲鹏程
祖峰磊
许超
Original Assignee
歌尔股份有限公司
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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
Publication of WO2018170945A1 publication Critical patent/WO2018170945A1/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
    • H04R9/06—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
    • 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
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the invention relates to the technical field of electroacoustic products, in particular to a moving magnetic speaker.
  • a speaker is an important acoustic component of a portable electronic device for converting electrical signals into sound signals. It is an energy conversion device; a linear vibration motor is one of the motors and an important component of portable electronic devices for portable use.
  • the vibration function of electronic equipment With the development of portable electronic devices, their size is required to be smaller and smaller. In order to meet the above requirements, a speaker having a vibration motor function has appeared.
  • the speaker and the vibration motor are packaged in a housing to reduce the volume of the electronic device.
  • Most existing speakers with vibrating motor functions are moving coil speakers, while moving coil speakers usually have motor magnets mounted on the diaphragm. Due to the vibration quality, the motor magnet cannot be too large, but the vibration performance of the vibration motor with a small motor magnet is relatively weak.
  • the present invention provides a moving magnetic speaker which has good high-frequency transient response and can realize the function of a good linear vibration motor, and has high space utilization and thickness. Small, taking up little space.
  • a moving magnetic speaker includes a casing, wherein the casing houses a diaphragm and a vibrator disposed in parallel with the diaphragm, the vibrator includes a voice coil; and the diaphragm is fixed to a side of the vibrator a driving magnet, wherein the voice coil is energized to form an electromagnet, and an electromagnetic induction force generated between the driving coil and the driving magnet drives the diaphragm to vibrate; and a side of the vibrator away from the diaphragm is provided with a motor magnet;
  • the driving motor is fixed on the basin frame, and the two ends of the basin frame are respectively fixed with elastic supporting members; the vibrator is supported by the elastic supporting member and can move left and right in a horizontal direction; the motor magnet and the motor The electromagnetic induction force between the voice coils drives the vibrator to vibrate in the horizontal direction.
  • the driving magnet is provided with three blocks, and the driving magnet located in the middle is set to The magnetic polarity directions of the two driving magnets are opposite to each other; the voice coil is provided with three corresponding to the three driving magnets; the current flowing in the middle of the voice coil is located on both sides The currents of the two voice coils are opposite in direction.
  • the motor magnet is provided with two pieces, and the magnetic polarities of the two motor magnets are oppositely arranged, and two of the motor magnets and the three of the driving magnets are staggered in a vertical direction.
  • the three voice coils are electrically connected to an external circuit through two FPCBs, and the FPCB is provided with three inner pads at one end of the inner side of the housing, and the FPCB is located at one end of the outer portion of the housing. There are three outer pads.
  • the housing is provided with a rear sound hole, and one end of the FPCB provided with the inner pad is located at the rear sound hole.
  • the lead wires of the voice coil located in the middle are electrically connected to one of the inner pads on the two FPCBs, and the lead wires of the voice coils on the two sides and the other two on the same FPCB.
  • the inner pads are electrically connected.
  • the outer pad in communication with the inner pad electrically connected to the middle of the voice coil is the same as any one of the other two outer pads on the same FPCB The outer pad is shorted.
  • the outer pads that are not shorted on the two FPCBs are respectively electrically connected to the positive and negative poles of the external circuit, and the three voice coils are connected in series.
  • the outer pads that are not shorted on the two FPCBs are respectively electrically connected to the positive and negative electrodes of the external circuit, and the shorted outer pads are respectively electrically connected to the negative electrode and the positive electrode of the external circuit, respectively.
  • the voice coils are connected in parallel.
  • each of the voice coils is provided with an armature at a center thereof, and the armatures are respectively disposed opposite to the driving magnets, and the armatures change their magnetization directions according to changes in the direction of current passing through the voice coils.
  • the diaphragm includes a folding ring at an edge and a vibration plate fixed at a middle portion of the folding ring, and the vibration plate is provided with a through hole corresponding to a position of each of the driving magnets, and each of the driving magnets is respectively It is fixed in each of the through holes.
  • the middle portion of the vibrating plate is provided with a curved portion, and the curved portion is convex upward.
  • each of the voice coils is provided with a magnetic conductive member, and the three magnetic conductive members respectively cover an upper surface of each of the voice coils and are provided with openings with respect to positions of the centers of the voice coils.
  • Located in two The magnetically permeable member on the two voice coils on the side also covers a portion of the outer side surface and a portion of the lower surface of the voice coil, and a portion of the magnetic conductive member covering the lower surface of the voice coil covers the sound The location of the center of the circle.
  • the vibrator further includes a magnet disposed between the adjacent two voice coils opposite to the motor magnet, and the magnet is disposed to have a magnetic polarity direction opposite to a magnetic polarity of the motor magnet The opposite direction.
  • one end of the elastic support member is fixedly connected to the basin frame, and the other end of the elastic support member is fixedly connected to the housing.
  • the motor magnet is fixed on the casing below the vibrator, the bottom of the basin frame is provided with an opening corresponding to the positions of the two motor magnets, and the bottom of the basin frame and the two A vibration space is provided between the motor magnets in the horizontal direction.
  • the elastic support member comprises two elastic arms, the two elastic arms are integrally connected at the same side end, the elastic arms are made of an elongated elastic member, and the elastic member The width in the longitudinal direction is greater than the width in the lateral direction; the ends of the two unattached elastic arms are fixedly connected to the basin frame and the outer casing, respectively.
  • the moving magnetic speaker of the present invention comprises a housing, wherein the housing is provided with a diaphragm and a vibrator disposed in parallel with the diaphragm, the vibrator includes a voice coil, and a side of the diaphragm adjacent to the vibrator is fixed with a driving magnet;
  • the ring is fixed on the basin frame, and two ends of the basin frame are respectively fixed with elastic supporting members, the elastic supporting member has an elastic deformation space in a horizontal direction;
  • a motor magnet is disposed on a side of the vibrator away from the diaphragm; and a magnetic sense of the motor magnet Wire cutting the voice coil to push the vibrator to vibrate in the horizontal direction.
  • the motor magnet is disposed on the side away from the diaphragm so that it does not affect the vibration of the diaphragm, so that the size of the motor magnet can be as large as possible.
  • the voice coil passes the alternating motor current
  • the magnetic line of the motor magnet cuts the energized voice coil, and the vibrator is subjected to the electromagnetic induction force to generate horizontal vibration.
  • the size of the motor magnet is large enough to achieve good vibration function.
  • the electro-magnet is formed after the voice coil is energized, and the interaction force with the driving magnet drives the diaphragm to drive the sound.
  • the diaphragm Since the motor magnet and the diaphragm are respectively located on both sides of the vibrator, the diaphragm has sufficient vibration space to realize a good speaker function. . It can be seen that the moving magnetic speaker of the invention can meet the acoustic performance requirements of the high fidelity equipment, and can also realize the function of the good linear vibration motor, and can conveniently adjust the vibration space of the diaphragm, and has high space utilization and thickness. Small, taking up little space.
  • the FPCB Since the three voice coils are electrically connected to the external circuit through the two FPCBs, the FPCB is provided with three inner pads at one end of the inner side of the housing, and three outer pads are provided at one end of the FPCB at the outer side of the housing; the setting of the FPCB simplifies the manufacturing process It is also convenient to adjust the series-parallel relationship of the three voice coils to obtain the required impedance to adapt to the external circuit.
  • the motor magnet is provided with two pieces, the magnetic polarities of the two motor magnets are oppositely arranged, and the two motor magnets and the three driving magnets are staggered in the vertical direction; the two motor magnets improve the performance of the linear vibration motor.
  • the vibrator further includes a magnet disposed opposite the motor magnet between the adjacent two voice coils, and the magnet is disposed such that the magnetic polarity direction is opposite to the magnetic polarity of the motor magnet opposite thereto; the magnet can linearly sense the magnetic force of the motor magnet
  • the offset on both sides makes it more through the two voice coils, which improves the working efficiency of the vibration motor.
  • the magnet and the motor magnet repel each other, which can effectively prevent the driving magnet from adsorbing with the vibrator and balance the vibration position of the diaphragm. And the role of vibration space, improve the stability and reliability of the product.
  • each voice coil Since the center of each voice coil is provided with an armature, the three armatures are respectively arranged opposite to the three driving magnets, and the armature changes its magnetization direction according to the change of the current direction through the voice coil; when the voice coil is energized, the armature can be magnetized, and the sound is sounded.
  • the ring and the armature together constitute an electromagnet, which increases the strength of the magnetic field generated by the voice coil, enhances the force with the driving magnet, and improves the sensitivity of the speaker.
  • the diaphragm includes a folding ring at the edge and a vibration plate fixed at a middle portion of the folding ring, and the vibration plate is provided with a through hole corresponding to a position of each of the driving magnets, and each of the driving magnets is respectively fixed at each of the Through the hole; because the driving magnet is inserted into the through hole, the vibration space is increased, which further compensates for the loss of space performance caused by the speaker.
  • the present invention solves the problems of high frequency transient response difference and large thickness existing in the prior art moving magnetic speaker.
  • the dynamic magnetic speaker of the invention has good high-frequency transient response, and can conveniently adjust the vibration space of the diaphragm, has high space utilization, small thickness, high performance, stability and high reliability, and can meet high fidelity equipment. Performance requirements.
  • FIG. 1 is a schematic exploded view of a moving magnetic speaker of the present invention
  • Figure 2 is a cross-sectional structural view showing a moving magnetic speaker of the present invention
  • FIG. 3 is a schematic view showing the working principle of the speaker of the moving magnetic speaker of the invention.
  • FIG. 4 is a schematic view showing the working principle of the motor of the moving magnetic speaker of the invention.
  • FIG. 5 is a schematic structural view of a pad on a rear sound-emitting side FPCB of the moving magnetic speaker of the present invention.
  • FIG. 6 is a schematic structural view of an external pad of three voice coils connected in series according to the present invention.
  • FIG. 7 is a schematic structural view of an external pad of three voice coils connected in parallel according to the present invention.
  • 10 outer casing
  • 100 fixing part
  • 102 through hole
  • 104 post sound hole
  • 12 front cover
  • 120 sound hole
  • 20 through hole
  • 201 bend
  • 22 folding ring
  • 24 drive magnet
  • 26 motor magnet
  • 28 backing ring
  • 30 basic frame
  • 32a ⁇ 32b magnetically conductive parts
  • 36 armature
  • 38 magnet
  • 39 elastic support Piece
  • 40-FPCB 400-pad, 400a-400b-inner pad
  • 400c-400d-outer pad 50-58-arrow, 60-68-arrow, 70-76-arrow.
  • the moving magnetic speaker of the present invention comprises a housing in which a diaphragm and a vibrator disposed in parallel with the diaphragm are housed, and the vibrator includes a voice coil 34; the side of the diaphragm adjacent to the vibrator is fixed
  • the driving magnet 24 is energized to form an electromagnet, and an interaction force is generated with the driving magnet 24 to drive the diaphragm to vibrate;
  • a motor magnet 26 is disposed on a side of the vibrator away from the diaphragm; and the motor magnet 26 is fixed to the basin frame 30.
  • the two ends of the basin frame 30 are respectively fixed with elastic supporting members 39, and the elastic supporting members 39 can be elastically deformed; the vibrators are supported by the elastic supporting members 39, and can be moved left and right in the horizontal direction; the motor magnet 26 and the voice coil 34 are generated.
  • Electromagnetic induction force (ampere force) that drives the voice coil 34 to move left and right in the horizontal direction to vibrate the vibrator in the horizontal direction; the magnetic polarity directions of the drive magnet 24 and the motor magnet 26 are both vertical directions.
  • the motor magnet 26 Since the motor magnet 26 is provided on the side away from the diaphragm, the vibration of the diaphragm is not affected, and the size of the motor magnet 26 is not restricted by the diaphragm, so that the motor magnet 26 of a larger size can be provided.
  • an electromagnetic induction force (ampere force) is generated between the energized voice coil 34 and the motor magnet 26, and the electromagnetic induction force drives the vibrator to vibrate in the horizontal direction. Since the size of the motor magnet 26 is increased, the vibration function of the vibrator can be improved.
  • the voice coil 34 is energized to form an electromagnet, and the drive magnet 24 generates an interaction force to drive the diaphragm to drive the sound.
  • the diaphragm Since the motor magnet 26 and the diaphragm are respectively located on both sides of the vibrator, the diaphragm has sufficient vibration space to realize a good speaker function. It can be seen that the moving magnetic speaker of the invention can meet the acoustic performance requirements of the high fidelity equipment, and can also realize the function of the good linear vibration motor, and can conveniently adjust the vibration space of the diaphragm, and has high space utilization and thickness. Small, taking up little space.
  • the housing of the present embodiment includes a front cover 12 and an outer casing 10 which are vertically joined together, the front cover 12 is a box-like structure in which the lower end is open, and the outer casing 10 is a box-like structure in which the upper end is open.
  • the open end of the front cover 12 is fastened to the outer casing 10 toward the open end of the outer casing 10.
  • the diaphragm is fixedly mounted on the front cover 12, and the sound hole 120 is disposed in the middle of the front cover 12; the vibrator is disposed in the space surrounded by the front cover 12 and the outer casing 10 through two elastic support members 39, and two elastic support members 39 Attached to the outer casing 10, the motor magnet 26 is bonded to the unitary casing 10.
  • a driving magnet 24 is fixed in a middle portion of the diaphragm, and a through hole 200 corresponding to the driving magnet 24 is disposed at a position corresponding to the driving magnet 24 on the diaphragm, and each driving magnet 24 is inserted and adhered respectively. It is fixed in each through hole 200.
  • the magnetic polarity directions of the drive magnet 24 and the motor magnet 26 are both vertical directions.
  • the diaphragm includes an annular folding ring 22 at the edge and a vibration plate 20 disposed at the center of the folding ring 22.
  • the through hole 200 is disposed on the vibration plate 20, that is, the driving magnet 24 is fixed to the vibration plate 20.
  • a spacer ring 28 is fixed to the upper side of the edge portion of the folded ring 22, and the backing ring 28 is fixed to the inner side of the top of the front cover 12, thereby fixing the diaphragm to the front cover 12.
  • the middle portion of the vibrating plate 20 is provided with a bent portion 201, and the bent portion 201 is upwardly convex and disposed between the two driving magnets 24.
  • the drive magnet 24 of the moving coil type speaker of the present embodiment is provided with three pieces.
  • the voice coil 34 is provided with three, and the center of each of the three voice coils 34 is provided with an armature 36.
  • the three armatures 36 are respectively disposed corresponding to the three driving magnets 24; the driving magnets 24 located in the middle are disposed and located.
  • the magnetic polarity of the two driving magnets 24 on both sides are opposite in direction, and the direction of the energizing current of the voice coil 34 located in the middle is opposite to the direction of the energizing current of the two voice coils 34 located on both sides.
  • the folding ring 22 is a silicone folding ring, and is combined with the front cover 12 and the vibration plate 20 by an injection molding process.
  • the vibration plate 20 is provided with three through holes 200, and the three driving magnets 24 are respectively fixed and fixed. In the three through holes 200.
  • the motor magnet 26 is provided with two pieces, and two motor magnets 26 are fixedly disposed under the vibrator.
  • the two motor magnets 26 of the embodiment are respectively fixed at the bottom of the outer casing 10, and two The block motor magnet 26 and the three drive magnets 24 are alternately arranged in the vertical direction.
  • the vibrator also includes a magnet 38 disposed between adjacent two voice coils 34 and disposed opposite the motor magnet 26.
  • the magnets 38 are provided in total, and correspond to the two motor magnets 26, respectively.
  • the magnetic polarity direction of the magnet 38 is a vertical direction, and each of the magnets 38 is disposed such that the magnetic polarity directions are opposite to the magnetic polarity directions of the corresponding motor magnets 26, respectively, and the magnetic polarity directions of the two motor magnets 26 are oppositely disposed.
  • the voice coil 34, the armature 36 and the magnet 38 are both fixed on the basin frame 30, and the bottom of the basin frame 30 is provided with an opening corresponding to the positions of the two motor magnets 26, and the basin frame 30 is provided.
  • a vibration space is provided between the bottom and the two motor magnets 26.
  • two elastic support members 39 are respectively disposed at two ends of the basin frame 30, and two elastic support members 39 located at the same end of the basin frame 30 are disposed above and below, and are located on the left and right sides of the basin frame 30.
  • the elastic support members 39 are respectively located on both sides of the center line of the vibrator in the vibration direction.
  • each of the three voice coils 34 is provided with a magnetic conductive member.
  • the two magnetic conductive members 32a disposed on the two voice coils 34 on the two sides are identical in structure and disposed opposite to each other.
  • the magnetic conductive member 32a is provided.
  • the upper surface, the partial outer surface and the partial lower surface of the voice coil 34 are covered, and the portion of the magnetic conductive member 32a covering the upper surface of the voice coil 34 is provided with an opening corresponding to the position of the center of the voice coil 34 (ie, the position at which the armature 38 is mounted).
  • the portion of the magnetic conductive member 32a covering the lower surface of the voice coil 34 covers the center position of the voice coil 34, and can support the armature 38 while preventing the armature 38 from interfering with the motor magnet 26.
  • the magnetic conductive member 32b disposed on the voice coil 34 at the intermediate position is a flat plate structure covering only the upper surface of the voice coil 34, and the magnetic conductive member 32 is also provided with an opening with respect to the center of the voice coil 34.
  • the bottom of the outer casing 10 protrudes from the two ends of the outer casing 10 with a fixing portion 100 , and the lower ends of the outer side walls of the outer casings are respectively provided with a through hole. 102.
  • Two FPCBs (flexible printed circuit boards) 40 for electrically connecting the two voice coils 34 and the external circuit respectively pass through the two through holes 102, and one end of the FPCB 40 electrically connected to the voice coil 34 is fixedly fixed on the side.
  • one end of the FPCB 40 connected to the external circuit is attached and fixed to the fixing portion 100, and the other end of the FPCB 40 is fitted through the side wall of the casing 10 to the bottom of the casing 10 on the inner side of the side wall.
  • the outer casing 10 is provided with a rear sound hole 104.
  • the FPCB 10 attached to the fixed portion 100 is provided with three outer pads 400.
  • the FPCB 40 attached to the rear sound hole 104 is provided with three inner pads 400.
  • the number of pads 400 coincides with the number of voice coils 34.
  • the design of the dual FPCB 40 can be adjusted by adjusting the soldering manner of the inner pad 400 and the voice coil 34 lead and the routing mode of the FPCB 40, so that the current on the voice coil 34 is performed after the outer pad 400 is energized according to the requirements of the positive and negative electrodes. The way it needs to flow.
  • the two leads of the voice coil 34 in the middle are connected to the inner pads 400b on the two FPCBs 40, and the leads of the voice coils 34 on the two sides are connected to the inner pads 400a on the FPCB 40 on the same side. If more than three voice coils 34 are provided, the two leads of the middle voice coil 34 are connected to the two FPCBs 40, respectively.
  • the series connection and the parallel connection of the voice coil 34 can be realized by adjusting the other outer pads 400c to connect the positive and negative electrodes of the external circuit.
  • the outer pad 400c on the left side is connected to the positive electrode of the external circuit
  • the outer pad 400c on the right side is connected to the negative electrode of the external circuit
  • the two short-circuited outer pads on the left side are connected to the negative electrode of the external circuit.
  • the three voice coils 34 in the housing are connected in parallel.
  • the working principle of the moving magnetic speaker of the present invention is as follows:
  • FIG. 3 shows the working principle of the speaker.
  • the vibration direction of the sounding unit is vertical.
  • ⁇ and ⁇ represent the current direction in the voice coil 34
  • ⁇ indicates that the current direction is perpendicular to the paper surface
  • ⁇ indicates the current direction.
  • the upper end of the drive magnet 24 on both sides is an S pole
  • the lower end is an N pole
  • the upper end of the drive magnet 24 is N pole at the upper end and S pole at the lower end.
  • the current directions of the three voice coils 34 are as shown in the figure. According to the right hand rule, the voice coils 34 located on both sides at this time generate an upward magnetic field, as indicated by the arrow 52, at the center of the two voice coils 34 on both sides.
  • the upper end of the armature 36 is N pole, repels the driving magnets 24 on both sides, and the moving direction of the driving magnets 24 on both sides is upward, as indicated by an arrow 56; at this time, the voice coil 34 located in the middle is downward.
  • the magnetic field, as indicated by the arrow 50, the upper end of the armature 36 at the center of the voice coil 34 is S pole, repels the drive magnet 24 located in the middle, and the drive magnet 24 located in the middle also moves upward, as indicated by the arrow 54
  • the diaphragm moves upward as indicated by arrow 58. When the current passing through the three voice coils 34 is reversed, the diaphragm will move downward to achieve vibrational sounding.
  • Fig. 4 shows the working principle of the motor.
  • the vibrating direction of the vibrator is horizontal.
  • the upper end of the motor magnet 26a on the left side is N pole
  • the lower end is S pole
  • the upper end of the magnet 38 is S pole and lower end.
  • the magnetic field directions of the motor magnet 26a and the magnet 38 are respectively indicated by arrows 62 and 60, and the magnet 38 divides the magnetic line of the motor magnet 26 to both sides, and more passes through the voice coil 34 on both sides of the magnet 38.
  • the electromagnetic induction force received by the voice coil 34 located on the left side of the motor magnet 26a at this time can be decomposed into two forces to the left and upward, which are located on the right side of the motor magnet 26a.
  • the electromagnetic induction force received by the voice coil 34 can be broken down into two forces, left and downward, where the upward and downward forces cancel each other and the entire vibrator moves to the left, as indicated by arrow 68.
  • the upper end of the motor magnet 26b in the figure is an S pole
  • the lower end is an N pole
  • the upper end of the magnet 38 is an N pole
  • the lower end is an S pole
  • the magnetic directions of the motor magnet 26b and the magnet 38 are indicated by arrows 72 and 70, respectively.
  • the magnet 38 divides the magnetic line of the motor magnet 26b to the sides, more through the voice coil 34 on both sides of the magnet 38, as indicated by arrows 74 and 76, and is located on the left side of the motor magnet 26b according to the left hand rule.
  • the electromagnetic induction force received by the voice coil 34 can be decomposed into two forces to the left and upward, and the electromagnetic induction force received by the voice coil 34 located on the right side of the motor magnet 26b can be decomposed into two forces to the left and the downward, wherein The two forces, up and down, cancel each other out and the entire vibrator moves to the left, as indicated by arrow 68.
  • the vibrator is also not displaced in the vertical direction under the fixation of the elastic support member 39, and can only be displaced in the horizontal direction. When the current passing through the three voice coils 34 is reversed, the vibrator will move to the right, thereby achieving linear horizontal vibration.
  • the two elastic support members 39 have the same structure.
  • the elastic support member 39 includes two elastic arms, each of which is made of an elongated elastic member, and the width of the elastic member in the longitudinal direction is greater than the width in the lateral direction, and the two elastic arms are located on the same side.
  • the end portion is integrally connected, and the two elastic arms are at an angle.
  • the angle is preferably an acute angle, and the ends of the two elastic arms that are not connected are fixedly connected to the basin frame 30 and the outer casing 10, respectively.
  • the connection point between the basin frame 30 and the outer casing 10 is located on the same side of the center line in the vibration direction of the vibrator.
  • the two elastic support members 39 are symmetrically disposed with respect to the diagonal of the vibrator.
  • the input current signal of the voice coil can be adjusted to control whether the product works in the speaker mode or the vibration motor mode, and even the speaker and the vibration motor work simultaneously. This combines the speaker with the vibration motor to greatly increase the space utilization of the portable electronics while maintaining the same performance.

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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)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

一种动磁式扬声器，包括壳体(12；10)，壳体(12；10)内设有振膜和振子，振子包括音圈（34），振子的一侧固定有驱动磁铁（24）；音圈（34）固定于盆架（30）上，盆架（30）的两端分别固定有弹性支撑件（39）；振子远离振膜的一侧设有马达磁铁（26）；马达磁铁（26）与音圈（34）之间的电磁感应力驱动振子在水平方向上振动。

Description

动磁式扬声器 技术领域
本发明涉及电声产品技术领域，尤其涉及一种动磁式扬声器。
背景技术
扬声器是便携式电子设备的重要声学部件，用于将电信号转换为声音信号，是一种能量转换器件；线性振动马达是马达中的一种，也是便携式电子设备的一个重要部件，用于实现便携式电子设备的振动功能。随着便携式电子设备的发展，要求其体积越来越小。为了满足上述要求，出现了具有振动马达功能的扬声器。就是将扬声器与振动马达封装到一个壳体内，以减小电子设备的体积。现有的具有振动马达功能的扬声器大多为动圈式扬声器，而动圈式扬声器通常将马达磁铁安装在振膜上。受限于振动质量，马达磁铁不能太大，但是马达磁铁较小的振动马达的振动性能相对较弱。
发明内容
针对上述现有技术中存在的问题，本发明提供一种动磁式扬声器，该动磁式扬声器高频瞬态响应好，同时能够实现良好的线性振动马达的功能，且空间利用率高，厚度小，占用空间小。
本发明的技术方案
一种动磁式扬声器，包括壳体，所述壳体内收容有振膜以及与所述振膜平行设置的振子，所述振子包括音圈；所述振膜靠近所述振子的一侧固定有驱动磁铁，所述音圈通电后形成电磁铁，与所述驱动磁铁之间产生的电磁感应力驱动所述振膜振动发声；所述振子远离所述振膜的一侧设有马达磁铁；所述驱动马达固定于盆架上，所述盆架的两端分别固定有弹性支撑件；所述振子被所述弹性支撑件支撑，并且可以在水平方向上左右移动；所述马达磁铁与所述音圈之间的电磁感应力驱动所述振子在所述水平方向上振动。
优选方式为，所述驱动磁铁设有三块，位于中间的所述驱动磁铁被设置为 与位于两侧的两所述驱动磁铁的磁极性方向相反；所述音圈设有三个，分别与三块所述驱动磁铁对应设置；位于中间的所述音圈的通电电流方向与位于两侧的两所述音圈的通电电流方向相反。
优选方式为，所述马达磁铁设有两块，两块所述马达磁铁的磁极性方向相反设置，且两块所述马达磁铁与三块所述驱动磁铁在竖直方向上交错设置。
优选方式为，三个所述音圈通过两个FPCB与外部电路电连接，所述FPCB位于所述壳体内侧的一端设有三个内焊盘，所述FPCB位于所述壳体外部的一端设有三个外焊盘。
优选方式为，所述壳体上设有后出声孔，所述FPCB设置有所述内焊盘的一端位于所述后出声孔处。
优选方式为，位于中间的所述音圈的引线分别与两所述FPCB上的一个所述内焊盘电连接，位于两侧的所述音圈的引线与同一所述FPCB上的另两个所述内焊盘电连接。
优选方式为，与位于中间的所述音圈电连接的所述内焊盘相连通的所述外焊盘，与同一所述FPCB上的另两个所述外焊盘中的任一个所述外焊盘短接。
优选方式为，两所述FPCB上未短接的所述外焊盘分别与所述外部电路的正极和负极电连接，三个所述音圈串接。
优选方式为，两所述FPCB上未短接的所述外焊盘分别与外部电路的正极和负极电连接，短接的所述外焊盘分别与外部电路的负极和正极电连接，三个所述音圈并接。
优选方式为，各所述音圈的中心各设置有一块衔铁，所述衔铁分别与所述驱动磁铁相对设置，所述衔铁根据通过所述音圈的电流方向的变化而改变自身的磁化方向。
优选方式为，所述振膜包括位于边缘的折环及固定在所述折环中部的振动板，所述振动板上对应各所述驱动磁铁的位置设有贯穿孔，各所述驱动磁铁分别固定在各所述贯穿孔中。
优选方式为，所述振动板的中部设有弯曲部，所述弯曲部向上凸起。
优选方式为，各所述音圈上均设有导磁部件，三个所述导磁部件分别覆盖各所述音圈的上表面且相对于各所述音圈中心的位置设有开口，设置在位于两 侧的两所述音圈上的所述导磁部件还覆盖了所述音圈的部分外侧面及部分下表面，所述导磁部件覆盖在所述音圈下表面的部分覆盖了所述音圈中心的位置。
优选方式为，所述振子还包括设置在相邻两所述音圈之间与所述马达磁铁相对设置的磁铁，且所述磁铁被设置为磁极性方向与其相对的所述马达磁铁的磁极性方向相反。
优选方式为，所述弹性支撑件的一端与所述盆架固定连接，所述弹性支撑件的另一端与所述壳体固定连接。
优选方式为，所述马达磁铁固定在位于所述振子下方的所述壳体上，所述盆架的底部对应两所述马达磁铁的位置设有开口，且所述盆架的底部与两所述马达磁铁之间在水平方向上设有振动空间。
优选方式为，所述弹性支撑件包括两条弹性臂，两条所述弹性臂位于同侧的端部连接为一体，所述弹性臂由长条形状的弹性构件制成，且所述弹性构件在纵向上的宽度均大于其在横向上的宽度；两条所述弹性臂未相连接的端部分别与所述盆架和所述外壳固定连接。
本发明的有益效果
由于本发明动磁式扬声器，包括壳体，该壳体内设有收容有振膜，以及与振膜平行设置的振子，振子包括音圈，振膜靠近振子的一侧固定有驱动磁铁；其中音圈固定于盆架上，盆架的两端分别固定有弹性支撑件，该弹性支撑件具有沿水平方向的弹性形变空间；振子远离振膜的一侧设有马达磁铁；当马达磁铁的磁感线切割音圈，推动振子沿水平方向振动。本发明因马达磁铁设在远离振膜的一侧，使其不影响振膜的振动，使马达磁铁的尺寸可以尽可能的大。当音圈通过交变的马达电流时，马达磁铁的磁感线切割通电的音圈，振子受到电磁感应力的作用而产生水平方向振动，因马达磁铁的尺寸足够大，实现了良好的振动功能。同时音圈通电后形成电磁铁，与驱动磁铁产生相互作用力驱动振膜驱动发声，因马达磁铁与振膜分别位于振子的两侧，使振膜具有足够的振动空间，实现了良好的扬声器功能。可见，本发明的动磁式扬声器，能够满足高保真设备的声学性能要求，同时还能够实现良好的线性振动马达的功能，且能够很方便的调整振膜的振动空间，空间利用率高，厚度小，占用的空间小。
由于三个音圈通过两个FPCB与外部电路电连接，FPCB位于壳体内侧的一端设有三个内焊盘，FPCB位于壳体外部的一端设有三个外焊盘；FPCB的设置简化了制作工艺，还可方便的调整三个音圈的串并联关系，获得所需的阻抗适应外部电路。
由于马达磁铁设有两块，两块马达磁铁的磁极性方向相反设置，且两块马达磁铁与三块驱动磁铁在竖直方向上交错设置；两块马达磁铁提升了线性振动马达的性能。
由于振子还包括设置在相邻两音圈之间与马达磁铁相对设置的磁铁，且磁铁被设置为磁极性方向与其相对的马达磁铁的磁极性方向相反；磁铁能够将马达磁铁的磁感线向两侧偏移，使其更多的通过两个音圈，提升了振动马达的工作效率，同时磁铁与马达磁铁相互排斥，能够有效的防止驱动磁铁与振子相吸附，起到了平衡振膜振动位置和振动空间的作用，提高了产品的稳定性和可靠性。
由于各音圈的中心各设置有一块衔铁，三衔铁分别与三驱动磁铁相对设置，衔铁根据通过音圈的电流方向的变化而改变自身的磁化方向；当音圈通电时能够将衔铁磁化，音圈与衔铁共同构成了电磁铁，增加了音圈产生的磁场强度，增强了与驱动磁铁之间的作用力，能够提高扬声器的灵敏度。
由于振膜包括位于边缘的折环及固定在所述折环中部的振动板，所述振动板上对应各所述驱动磁铁的位置设有贯穿孔，各所述驱动磁铁分别固定在各所述贯穿孔中；因驱动磁铁插入贯穿孔中，增大了振动空间，进一步弥补了空间减小给扬声器性能带来的损失。
综上所述，本发明解决了现有技术中的动磁式扬声器中存在的高频瞬态响应差，厚度大等问题。本发明的动磁式扬声器的高频瞬态响应好，且能够很方便的调整振膜的振动空间，空间利用率高，厚度小，性能高，稳定性且可靠性高，能够满足高保真设备的性能要求。
附图说明
图1是本发明的动磁式扬声器的分解结构示意图；
图2是本发明的动磁式扬声器的剖视结构示意图；
图3是发明的动磁式扬声器的扬声器工作原理示意图；
图4是发明的动磁式扬声器的马达工作原理示意图；
图5是本发明的动磁式扬声器的后出声孔侧FPCB上焊盘的结构示意图；
图6是本发明的三个音圈串联的外焊盘外接的结构示意图；
图7是本发明的三个音圈并联的外焊盘外接的结构示意图；
图中：10—外壳、100—固定部、102—通孔、104—后出声孔、12—前盖、120—出声孔、20—振动板、200—贯穿孔、201—弯曲部、22—折环、24—驱动磁铁、26—马达磁铁、28—垫环、30—盆架、32a～32b—导磁部件、34—音圈、36—衔铁、38—磁铁、39—弹性支撑件、40—FPCB、400—焊盘、400a～400b—内焊盘、400c～400d—外焊盘、50～58—箭头、60～68—箭头、70～76—箭头。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限制本发明的范围。
如图1和图2所示，本发明的动磁式扬声器包括壳体，壳体内收容有振膜以及与振膜平行设置的振子，振子包括音圈34；振膜靠近振子的一侧固定有驱动磁铁24，音圈34通电后形成电磁铁，与驱动磁铁24产生相互作用力驱动振膜振动发声；振子远离振膜的一侧设有马达磁铁26；马达磁铁26固定于盆架30上，盆架30的两端分别固定有弹性支撑件39，弹性支撑件39可以发生弹性形变；振子被弹性支撑件39支撑，并且可以在水平方向上左右移动；马达磁铁26与音圈34之间产生电磁感应力(安培力)，该电磁感应力驱动音圈34在水平方向上左右移动，从而使振子在水平方向上振动；驱动磁铁24和马达磁铁26的磁极性方向均为竖直方向。
因马达磁铁26设在远离振膜的一侧，使其不影响振膜的振动，使马达磁铁26的尺寸不受振膜的限制，因而可以设置更大尺寸的马达磁铁26。当音圈34通过交变的电流时，通电的音圈34与马达磁铁26之间产生电磁感应力(安培力)，该电磁感应力驱动振子在水平方向上振动。由于马达磁铁26的尺寸增大了，可以改进振子的振动功能。同时，音圈34通电后形成电磁铁，与驱动磁铁 24产生相互作用力驱动振膜驱动发声。因马达磁铁26与振膜分别位于振子的两侧，使振膜具有足够的振动空间，实现了良好的扬声器功能。可见，本发明的动磁式扬声器，能够满足高保真设备的声学性能要求，同时还能够实现良好的线性振动马达的功能，且能够很方便的调整振膜的振动空间，空间利用率高，厚度小，占用的空间小。
如图1和图2所示，本实施例的壳体包括上下结合在一起的前盖12和外壳10，前盖12为下端敞口的盒状结构，外壳10为上端敞口的盒状结构，前盖12的敞口端面向外壳10的敞口端扣合在外壳10上。振膜固定安装在前盖12上，前盖12的中部设有出声孔120；振子通过两个弹性支撑件39设置在前盖12和外壳10围成的空间内，两个弹性支撑件39与外壳10固定连接，马达磁铁26粘结在单体外壳10上。
如图1和图2所示，振膜的中部固定有驱动磁铁24，振膜上对应驱动磁铁24的位置设有与驱动磁铁24相适配的贯穿孔200，各驱动磁铁24分别插入并粘接固定在各贯穿孔200内。驱动磁铁24和马达磁铁26的磁极性方向均为竖直方向。本实施方式中振膜包括位于边缘的环形的折环22及设置在折环22中部的振动板20，贯穿孔200设置在振动板20上，即驱动磁铁24固定在振动板20上。折环22的边缘部的上侧固定有垫环28，垫环28固定在前盖12顶部的内侧，从而将振膜固定在前盖12上。振动板20的中部设有弯曲部201，弯曲部201向上凸起，位于两驱动磁铁24之间设置。
如图1和图2所示，本实施例动圈式扬声器的驱动磁铁24设有三块。相应地，音圈34设有三个，三个音圈34的中心各设有一块衔铁36，三块衔铁36分别与三块驱动磁铁24相对应设置；位于中间的驱动磁铁24被设置为与位于两侧的两驱动磁铁24的磁极性方向相反，位于中间的音圈34的通电电流方向与位于两侧的两音圈34的通电电流方向相反。
如图1和图2所示，折环22为硅胶折环，与前盖12和振动板20通过注塑工艺结合，振动板20上设有三个贯穿孔200，三块驱动磁铁24分别粘接固定在三个贯穿孔200内。
如图1和图2所示，马达磁铁26设有两块，两块马达磁铁26均固定设置在振子的下方，本实施例的两块马达磁铁26分别固定在外壳10的底部，且两 块马达磁铁26与三块驱动磁铁24在竖直方向上交错设置。振子还包括设置在相邻的两音圈34之间并与马达磁铁26相对设置的磁铁38。在本实施方式中，磁铁38共设有两块，分别与两块马达磁铁26相对应。磁铁38的磁极性方向为竖直方向，且每个磁铁38被设置为磁极性方向分别与相对应的马达磁铁26的磁极性方向相反，而且两块马达磁铁26的磁极性方向相反设置。
如图2、图3和图4所示，音圈34、衔铁36和磁铁38均固定在盆架30上，盆架30的底部对应两马达磁铁26的位置各设有一开口，且盆架30的底部与两马达磁铁26之间设有振动空间。
如图2、图3和图4所示，盆架30的两端各设有两个弹性支撑件39，位于盆架30同一端的两弹性支撑件39上下设置，且位于盆架30左右两侧的弹性支撑件39分别位于振子在振动方向上的中心线的两侧。
如图1和图2所示，三个音圈34上均设有一导磁部件，设置在位于两侧的两个音圈34上的两导磁部件32a结构相同且相对设置，导磁部件32a同时覆盖了音圈34的上表面、部分外侧表面和部分下表面，导磁部件32a覆盖住音圈34上表面的部分对应音圈34中心的位置(即安装衔铁38的位置)设有开口，导磁部件32a覆盖住音圈34下表面的部位覆盖了音圈34的中心位置，可对衔铁38起到承托作用，同时还可防止衔铁38与马达磁铁26产生干扰。设置在位于中间位置的音圈34上的导磁部件32b为平板结构，仅覆盖住该音圈34的上表面，同时导磁部件32相对于该音圈34中心的位置也设有开口。
如图1、图2、图5、图6和图7所示，外壳10的底部向外壳10的两端各伸出一固定部100，位于该两端的外壳侧壁的下端各设有一通孔102，用于分别电连接两音圈34与外部电路的两FPCB(柔性印刷线路板)40分别从两个通孔102处穿过，FPCB40与音圈34电连接的一端贴合固定在位于侧壁内侧的外壳底部上，FPCB40与外部电路连接的一端贴合固定在固定部100上，FPCB40的另一端穿过外壳10的侧壁贴合在位于侧壁内侧的外壳10的底部上。外壳10上设有后出声孔104，贴合在固定部100上的FPCB10上设有三外焊盘400，贴合在后出声孔104的FPCB40上设有三内焊盘400。焊盘400的数量与音圈34数量相一致。双FPCB40的设计，可通过调整内焊盘400与音圈34引线的焊接方式和FPCB40的走线方式，实现外焊盘400按照正负极要求通电后，音圈34上的电流按照所 需的方式流动。
如图5所示，位于中间的音圈34的两引线分别与两FPCB40上的内焊盘400b连接，位于两边的音圈34的引线与同侧的FPCB40上的内焊盘400a连接。若设有三个以上的音圈34时，所有位于中间的音圈34的两引线分别接在两个FPCB40上。
如图6和图7所示，FPCB40上的外焊盘400，其中与位于中间的音圈34电连接的外焊盘400d，与其他任一与两侧音圈34电连接的外焊盘400c短接。短接后，通过调整其他外焊盘400c接入外部电路正负极，可实现音圈34的串联连接和并联连接。
如图6中所示，当左侧的外焊盘400c与外部电路负极连接，右侧的外焊盘400c与外部电路正极连接后，短接在一起的外焊盘不外接外部电路时，壳体内的三个音圈34串联连接。
如图7所示，当左侧的外焊盘400c与外部电路正极连接，右侧的外焊盘400c与外部电路负极连接，左侧的两个短接的外焊盘与外部电路负极连接，右侧的两个短接的外焊盘与外部电路正极连接时，壳体内的三个音圈34并联连接。
如图3和图4所示，本发明的动磁式扬声器的工作原理如下：
图3所示的为扬声器的工作原理，发声单元的振动方向为竖直方向，图示中⊙和⊕代表音圈34内的电流方向，⊙表示电流方向垂直于纸面向外，⊕表示电流方向垂直于纸面向内。位于两侧的驱动磁铁24的上端为S极，下端为N极，位于中间的驱动磁铁24的上端为N极，下端为S极。三个音圈34的电流方向如图所示，根据右手定则，此时位于两侧的音圈34产生的是向上的磁场，如箭头52所示，位于两侧的两个音圈34中心的衔铁36的上端为N极，与位于两侧的驱动磁铁24相排斥，位于两侧的驱动磁铁24的运动方向向上，如箭头56所示；此时位于中间的音圈34产生向下的磁场，如箭头50所示，位于该音圈34中心的衔铁36的上端为S极，与位于中间的驱动磁铁24相斥，位于中间的驱动磁铁24也向上运动，如箭头54所示，从而振膜向上运动，如箭头58所示。当三个音圈34内通过的电流反向时，振膜将向下运动，从而实现振动发声。
图4所示的为马达的工作原理，振子的振动方向为水平方向，图中左侧的马达磁铁26a的上端为N极，下端为S极，左侧的磁铁38的上端为S极，下端 为N极，马达磁铁26a与磁铁38的磁场方向分别如箭头62和60所示，磁铁38将马达磁铁26的磁感线分向两侧，更多的穿过磁铁38两侧的音圈34，如箭头64和66所示，根据左手定则，此时位于马达磁铁26a左侧的音圈34受到的电磁感应力可分解为向左和向上的两个力，位于马达磁铁26a右侧的音圈34受到的电磁感应力可分解为向左和向下的两个力，其中向上和向下的两个力相互抵消，整个振子会向左运动，如箭头68所示。图中右侧的马达磁铁26b的上端为S极，下端为N极，磁铁38的上端为N极，下端为S极，马达磁铁26b与磁铁38的磁场方向分别如箭头72和70所示，磁铁38将马达磁铁26b的磁感线分向两侧，更多的穿过磁铁38两侧的音圈34，如箭头74和76所示，根据左手定则，此时位于马达磁铁26b左侧的音圈34受到的电磁感应力可分解为向左和向上的两个力，位于马达磁铁26b右侧的音圈34受到的电磁感应力可分解为向左和向下的两个力，其中向上和向下的两个力相互抵消，整个振子会向左运动，如箭头68所示。振子在弹性支撑件39的固定下也不会在竖直方向上发生位移，只能够在水平方向上发生位移。当三个音圈34内通过的电流反向时，振子将向右运动，从而实现线性的水平方向的振动。
如图1和图2所示，两弹性支撑件39结构相同。弹性支撑件39包括两条弹性臂，两条弹性臂均由长条形状的弹性构件制成，且弹性构件在纵向上的宽度均大于其在横向上的宽度，两条弹性臂位于同侧的端部连接为一体，且两条弹性臂之间夹有一定角度，本实施方式该角度优选为锐角，两条弹性臂未相连接的端部分别与盆架30和外壳10固定连接，且与盆架30和外壳10之间的连接点均位于振子振动方向上的中心线的同侧。两弹性支撑件39相对于振子的对角线对称设置。
由于扬声器与振动马达的F0(谐振频率)相差较大，在工作的过程中，可以通过调整音圈的输入电流信号控制产品工作在扬声器模式还是振动马达模式，甚至是扬声器与振动马达同时工作，这样将扬声器与振动马达组合在一起，在维持性能不变的情况下大大提高了便携式电子产品的空间利用率。
以上所述本发明的较佳实施例而已，并不用以限制本发明的范围，凡在本发明的精神和原则之内所作的任何修改、等同一种动磁式扬声器结构的改进等，均应包含在本发明的保护范围之内。

Claims (17)

  1. 一种动磁式扬声器，包括壳体，其特征在于，所述壳体内收容有振膜以及与所述振膜平行设置的振子，所述振子包括音圈；
    所述振膜靠近所述振子的一侧固定有驱动磁铁，所述音圈与所述驱动磁铁之间产生电磁感应力驱动所述振膜振动发声；
    所述振子远离所述振膜的一侧设有马达磁铁；
    所述马达磁铁固定于盆架上，所述盆架的两端分别固定有弹性支撑件；
    所述振子被所述弹性支撑件支撑，并且可以在水平方向上左右移动；
    所述马达磁铁与所述音圈之间的电磁感应力驱动所述振子在所述水平方向上振动。
  2. 根据权利要求1所述的动磁式扬声器，其特征在于，所述驱动磁铁设有三块，位于中间的所述驱动磁铁被设置为磁极性方向与位于两侧的两所述驱动磁铁的磁极性方向相反；所述音圈设有三个，分别与三块所述驱动磁铁对应设置；位于中间的所述音圈的通电电流方向与位于两侧的两所述音圈的通电电流方向相反。
  3. 根据权利要求2所述的动磁式扬声器，其特征在于，所述马达磁铁设有两块，两块所述马达磁铁的磁极性方向相反设置，且两块所述马达磁铁与三块所述驱动磁铁在竖直方向上交错设置。
  4. 根据权利要求2所述的动磁式扬声器，其特征在于，三个所述音圈通过两个FPCB与外部电路电连接，所述FPCB位于所述壳体内侧的一端设有三个内焊盘，所述FPCB位于所述壳体外部的一端设有三个外焊盘。
  5. 根据权利要求4所述的动磁式扬声器，其特征在于，所述壳体上设有后出声孔，所述FPCB设置有所述内焊盘的一端位于所述后出声孔处。
  6. 根据权利要求5所述的动磁式扬声器，其特征在于，位于中间的所述音圈的引线分别与两所述FPCB上的一个所述内焊盘电连接，位于两侧的所述音圈的引线与同一所述FPCB上的另两个所述内焊盘电连接。
  7. 根据权利要求6所述的动磁式扬声器，其特征在于，与位于中间的所述音圈电连接的所述内焊盘相连通的所述外焊盘，与同一所述FPCB上的另两个所述外焊盘中的任一个所述外焊盘短接。
  8. 根据权利要求7所述的动磁式扬声器，其特征在于，两所述FPCB上未短 接的所述外焊盘分别与所述外部电路的正极和负极电连接，三个所述音圈串接。
  9. 根据权利要求7所述的动磁式扬声器，其特征在于，两所述FPCB上未短接的所述外焊盘分别与外部电路的正极和负极电连接，短接的所述外焊盘分别与外部电路的负极和正极电连接，三个所述音圈并接。
  10. 根据权利要求2至9任一项所述的动磁式扬声器，其特征在于，各所述音圈的中心各设置有一块衔铁，所述衔铁分别与所述驱动磁铁相对设置，所述衔铁根据通过所述音圈的电流方向的变化而改变自身的磁化方向。
  11. 根据权利要求10所述的动磁式扬声器，其特征在于，所述振膜包括位于边缘的折环及固定在所述折环中部的振动板，所述振动板上对应各所述驱动磁铁的位置设有贯穿孔，各所述驱动磁铁分别固定在各所述贯穿孔中。
  12. 根据权利要求11所述的动磁式扬声器，其特征在于，所述振动板的中部设有弯曲部，所述弯曲部向上凸起。
  13. 根据权利要求10所述的动磁式扬声器，其特征在于，各所述音圈上均设有导磁部件，三个所述导磁部件分别覆盖各所述音圈的上表面且相对于各所述音圈中心的位置设有开口，设置在位于两侧的两所述音圈上的所述导磁部件还覆盖了所述音圈的部分外侧面及部分下表面，所述导磁部件覆盖在所述音圈下表面的部分覆盖了所述音圈中心的位置。
  14. 根据权利要求10所述的动磁式扬声器，其特征在于，所述振子还包括设置在相邻两所述音圈之间与所述马达磁铁相对设置的磁铁，所述磁铁被设置为磁极性方向与其相对的所述马达磁铁的磁极性方向相反。
  15. 根据权利要求10所述的动磁式扬声器，其特征在于，所述弹性支撑件的一端与所述盆架固定连接，所述弹性支撑件的另一端与所述壳体固定连接。
  16. 根据权利要求15所述的动磁式扬声器，其特征在于，所述马达磁铁固定在位于所述振子下方的所述壳体上，所述盆架的底部对应两所述马达磁铁的位置设有开口，且所述盆架的底部与两所述马达磁铁之间设有振动空间。
  17. 根据权利要求16所述的动磁式扬声器，其特征在于，所述弹性支撑件包括两条弹性臂，两条所述弹性臂的一端连接为一体，所述弹性臂由长条形状的弹性构件制成，且所述弹性构件在纵向上的宽度均大于其在横向上的宽度；两条所述弹性臂未相连接的端部分别与所述盆架和所述外壳固定连接。
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