WO2022110362A1 - 发声装置 - Google Patents

发声装置 Download PDF

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Publication number
WO2022110362A1
WO2022110362A1 PCT/CN2020/136945 CN2020136945W WO2022110362A1 WO 2022110362 A1 WO2022110362 A1 WO 2022110362A1 CN 2020136945 W CN2020136945 W CN 2020136945W WO 2022110362 A1 WO2022110362 A1 WO 2022110362A1
Authority
WO
WIPO (PCT)
Prior art keywords
diaphragm
voice coil
sound
magnet assembly
magnet
Prior art date
Application number
PCT/CN2020/136945
Other languages
English (en)
French (fr)
Inventor
严绪东
邵涛
顾小江
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声光电科技(常州)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 瑞声声学科技(深圳)有限公司, 瑞声光电科技(常州)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2022110362A1 publication Critical patent/WO2022110362A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • 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
    • H04R9/045—Mounting
    • 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
    • H04R9/06—Loudspeakers
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/026—Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice
    • 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 field of sound-electricity conversion, in particular to a sound-generating device.
  • the prior art sound generating device includes a magnetic circuit system, a voice coil and a bracket, and the bracket is used to carry the magnetic circuit system and the voice coil.
  • the energized voice coil is subjected to Ampere force in the magnetic field generated by the magnetic circuit system, which causes the voice coil to vibrate, and the voice coil vibration drives the diaphragm to vibrate, which converts mechanical energy into sound energy.
  • the signal radiates out and reaches the human ear through the propagation of the air medium. Generally, we can hear the relevant sound information.
  • the utilization efficiency of the magnetic circuit system is not high, thereby affecting the sound-producing performance of the sound-producing device.
  • the purpose of the present invention is to provide a sound-generating device, which can improve the use efficiency of the magnetic circuit system by improving the design of the magnetic circuit system, thereby improving the sound-generating performance of the sound-generating device.
  • a sound-generating device comprising a support, a vibration system and a magnetic circuit system fixed to the support, the vibration system comprising a first vibration film, a second vibration film arranged opposite to the first vibration film, a driving A first voice coil of a diaphragm and a second voice coil that drives the second diaphragm.
  • the magnetic circuit system includes an iron core, a magnet assembly sleeved on the iron core, and a magnetic frame sleeved on the magnet assembly.
  • the first voice coil is provided with Between the magnetic frame and the magnet assembly, the second voice coil is arranged between the magnet assembly and the iron core.
  • the vibration system further includes a first voice coil bobbin disposed between the magnetic frame and the magnet assembly and a second voice coil bobbin disposed between the magnet assembly and the iron core, the first voice coil bobbin facing the first diaphragm One end is connected to the first diaphragm, the end of the first voice coil frame away from the first diaphragm is connected to the first voice coil, the first voice coil is wound on the first voice coil frame, and the second voice coil frame faces the second diaphragm One end of the second voice coil is connected to the second diaphragm, one end of the second voice coil frame away from the second diaphragm is connected to the second voice coil, and the second voice coil is wound and arranged on the second voice coil frame.
  • the magnetic frame includes a bottom for carrying the magnet assembly and a first side wall disposed around the bottom, the first side wall and the bottom form a accommodating cavity for accommodating the magnet assembly and the iron core, the bottom is provided with an opening, and the second voice coil bobbin passes through in the opening and arranged between the magnet assembly and the iron core.
  • the iron core includes a base and a cylinder located in a central area of the base, the magnet assembly is sleeved with the cylinder, and the base of the iron core and the bottom of the magnetic frame cooperate to limit the magnet assembly.
  • the magnet assembly includes a first magnet, a second magnet and a pole core spaced apart from the first magnet and the second magnet, and the first magnet, the pole core and the second magnet are arranged along the vibration direction of the first diaphragm.
  • the first diaphragm includes a first spherical top and a first sound diaphragm connected to the outer periphery of the first spherical top, the outer edge of the first sound diaphragm is fixed to the bracket, the first spherical top is connected to the first voice coil skeleton, the first The second diaphragm includes a second spherical top and a second sound diaphragm connected to the outer periphery of the second spherical top, the outer edge of the second sound diaphragm is fixed on the bracket, and the second spherical top is connected with the second voice coil frame.
  • the bracket includes a bearing portion for bearing the magnetic frame, the bearing portion includes a second side wall disposed around the magnetic frame, and the second side wall limits the magnetic frame.
  • the magnetic frame includes a first end portion facing the first diaphragm and a lug extending away from the iron core from the first end portion, and the lug is connected to the bearing portion.
  • the vibration system further includes an elastic wave disposed between the first diaphragm and the second diaphragm
  • the bracket further includes a main body and a connecting skeleton protruding from the main body toward the bearing portion, the connecting skeleton connects the main body and the bearing portion, and the elastic wave Installed on the connecting frame.
  • the vibration system further includes a first connector connected to the first diaphragm and a second connector connected to the second diaphragm
  • the elastic wave includes a first subsection and a second subsection that are connected to each other
  • the first connection The part includes a first annular part connected with the first diaphragm and a first extension part extending from the first annular part to the elastic wave, the first extension part is connected with the first sub-part
  • the second connecting part includes a second connection part with the second
  • the diaphragm is connected with the second annular portion and the second extension portion extending from the second annular portion toward the elastic wave, and the second extension portion is connected with the second sub-portion.
  • the magnetic circuit system includes an iron core, a magnet assembly sleeved on the iron core, and a magnetic frame sleeved on the magnet assembly, the first voice coil is disposed between the magnetic frame and the magnet assembly, and the second voice coil is disposed between the magnetic frame and the magnet assembly. It is arranged between the magnet assembly and the iron core.
  • the magnetic circuit system composed of the magnetic frame and the magnet assembly provides the driving force for the first voice coil, thereby driving the first diaphragm to vibrate and sound
  • the magnetic circuit system composed of the magnet assembly and the iron core provides the driving force for the second voice coil, thereby driving the first voice coil.
  • the second diaphragm vibrates to produce sound.
  • FIG. 1 is a schematic structural diagram of a sound generating device provided by an embodiment of the present invention
  • Fig. 2 is the exploded structure schematic diagram of the sounding device shown in Fig. 1;
  • FIG. 3 is a cross-sectional view of the sounding device shown in FIG. 1 along the A-A direction;
  • Fig. 4 is the structural representation of the bracket in the sounding device shown in Fig. 1;
  • Fig. 5 is the structural schematic diagram of the elastic wave in the sounding device shown in Fig. 2;
  • FIG. 6 is a schematic structural diagram of a first connector and a second connector in the sounding device shown in FIG. 2;
  • FIG. 7 is a schematic structural diagram of a first connector, a spring wave and a second connector in the sounding device shown in FIG. 2;
  • FIG. 8 is a schematic structural diagram of a magnetic frame in the sounding device shown in FIG. 2 .
  • FIG. 1 is a schematic structural diagram of a sounding device provided by an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an explosion structure of the sounding device shown in FIG. 1; Sectional drawing.
  • the present invention provides a sound generating device 100, which includes a bracket 1, a vibration system 2 and a magnetic circuit system 3 fixed to the bracket 1, the bracket 1 can provide support for the vibration system 2 and the magnetic circuit system 3, and the magnetic circuit system 3 can Drive the vibration system 2 to vibrate and sound.
  • the vibration system 2 includes a first diaphragm 21 , a second diaphragm 22 disposed opposite the first diaphragm 21 , a first voice coil 23 for driving the first diaphragm 21 , and a second voice coil 24 for driving the second diaphragm 22 .
  • the vibration system 2 further includes a first voice coil bobbin 28 disposed between the magnet frame 33 and the magnet assembly 32 and a second voice coil bobbin 29 disposed between the magnet assembly 32 and the iron core 31 . Both the first voice coil bobbin 28 and the second voice coil bobbin 29 are annular.
  • One end of the first voice coil bobbin 28 facing the first diaphragm 21 is connected to the first diaphragm 21 , and one end of the first voice coil bobbin 28 away from the first diaphragm 21 is connected to the first voice coil 23 , and the first voice coil 23 is wound and arranged On the first voice coil bobbin 28 , the first voice coil 23 vibrates to drive the first diaphragm 21 to vibrate through the first voice coil bobbin 28 to emit sound in the first sounding direction.
  • One end of the second voice coil bobbin 29 facing the second diaphragm 22 is connected to the second diaphragm 22 , one end of the second voice coil bobbin 29 away from the second diaphragm 22 is connected to the second voice coil 24 , and the second voice coil 24 is wound around On the second voice coil bobbin 29, the vibration of the second voice coil 24 drives the second diaphragm 22 to vibrate through the second voice coil bobbin 29 to emit sound in the second sounding direction.
  • the second sounding direction and the first sounding direction are different and opposite directions.
  • the first diaphragm 21 includes a first spherical top 214 and a first sound diaphragm 212 connected to the outer periphery of the first spherical top 214.
  • the first spherical top 214 may be a circular ring, and the first sound diaphragm 212 has an outer edge, an inner edge and a
  • the first sound membrane 212 also includes a first circular cavity formed by the inner edge, and the first dome 214 is clamped on the inner edge of the first sound membrane 212 to form a closed The first sound-emitting side structure.
  • the outer edge of the first sound membrane 212 is fixed to the bracket 1 , and the first dome 214 is connected with the first voice coil skeleton 28 , so that the first dome 214 and the first sound membrane 212 vibrate under the driving of the first voice coil skeleton 28 . voice.
  • the second diaphragm 22 includes a second spherical top 224 and a second sound diaphragm 222 connected to the outer periphery of the second spherical top 224.
  • the second spherical top 224 may be annular, and the second sound diaphragm 222 has an outer edge, an inner edge and
  • the second sound membrane 222 further includes a second circular cavity formed by the inner edge, and the second dome 224 is clamped on the inner edge of the second sound membrane 222 to form a closed The second sounding side structure.
  • the outer edge of the second sound membrane 222 is fixed to the bracket 1, and the second dome 224 is connected to the second voice coil skeleton 29, so that the second voice coil skeleton 29 drives the second dome 224 and the second sound membrane 222 to vibrate and produce sound .
  • the second dome 224 and the first dome 214 can be set to have the same shape and size, and the second sound membrane 222 and the first sound membrane 212 can also be set to have the same shape and size. .
  • the magnetic circuit system 3 includes an iron core 31 , a magnet assembly 32 sleeved on the iron core 31 , and a magnetic frame 33 sleeved on the magnet assembly 32 .
  • the first voice coil 23 is disposed between the magnetic frame 33 and the magnet assembly 32 .
  • the first voice coil 23 and the second voice coil 24 may be hollow cylinders, the first voice coil 23 is inserted in the gap between the magnetic frame 33 and the magnet assembly 32, and the second voice coil 24 is inserted in the gap between the magnetic frame 33 and the magnet assembly 32. in the gap between the magnet assembly 32 and the iron core 31 .
  • the magnetic frame 33 and the magnet assembly 32 drive the first voice coil 23 and the first diaphragm 21 to vibrate to emit sound from the first diaphragm 21 away from the first voice coil 23 , and the second voice coil 24 is disposed on the magnet assembly 32 and the iron core 31
  • the magnet assembly 32 and the iron core 31 drive the second voice coil 24 and the second diaphragm 22 to vibrate so as to emit sound from the second diaphragm 22 away from the second voice coil 24 .
  • the magnet assembly 32 includes a first magnet 322, a second magnet 324 and a pole core 326 spaced apart from the first magnet 322 and the second magnet 324.
  • the first magnet 322, the pole core 326 and the second magnet 324 vibrate along the first
  • the vibration direction of the film 21 is set to separate the first magnetic circuit system composed of the first magnet 322 and the magnetic frame 33 from the second magnetic circuit system composed of the second magnet 324 and the iron core 31, so as not to generate interference.
  • the pole core 326 may be a circular ring, and is sleeved on the second voice coil 24
  • the first voice coil 23 is sleeved on the pole core 326 .
  • the first voice coil 23, the pole core 326 and the second voice coil 24 are nested with each other.
  • the first magnet 322 may be a circular ring, and the thickness of the first magnet 322 is greater than the thickness of the pole core 326.
  • the second magnet 324 may also be a circular ring. The thicknesses of the two magnets 324 can be the same or different, so that the first magnet 322 interacts with the magnetic frame 33 to generate a first magnetic circuit system and the second magnet 324 interacts with the iron core 31 to generate a second magnetic circuit system.
  • the first magnet 322 and the second magnet 324 are symmetrically arranged with respect to the pole core 326 to save space.
  • FIG. 8 is a schematic structural diagram of the magnetic frame in the sounding device shown in FIG. 2 .
  • the magnetic frame 33 may include a bottom 331 for carrying the magnet assembly and a first side wall 332 disposed around the bottom.
  • the first side wall 332 and the bottom form a magnetic frame accommodating cavity 333 for accommodating the magnet assembly and the iron core.
  • the magnetic frame 33 may be Torus.
  • the bottom of the magnetic frame 33 is provided with an opening 334 , and the opening 334 may be circular.
  • the second voice coil bobbin 29 passes through the circular opening and is disposed between the magnet assembly 32 and the iron core 31 .
  • the bottom 331 of the magnetic frame 33 can carry the magnet assembly 32, and no other structure is required to carry the magnet assembly, thereby reducing the number of structural parts.
  • the magnetic frame 33 further includes a first end 336 facing the first diaphragm 21 and a lug 335 extending away from the iron core 31 from the first end 336 . Connect to bracket 1.
  • the magnetic frame 33 is arranged on the bracket 1 by the lugs 335 , and the lugs 335 and the bracket 1 can be fixedly connected by means of glue, clamping, etc., so that the magnetic frame 33 can be conveniently fixed in the bracket 1 .
  • the iron core 31 includes a base 312 and a cylinder 314 located in the central area of the base. Both the base 312 and the cylinder 314 are annular, and the thickness of the cylinder 314 is greater than that of the base. In some embodiments, the thickness of the cylinder 314 Equal to the thickness of the magnet assembly plus the thickness of the bottom opening of the magnet frame.
  • the magnet assembly 32 is sleeved with the column body 314 , and the base 312 of the iron core 31 and the bottom 331 of the magnetic frame 33 cooperate with the magnet assembly 32 to limit the position. By using the base 312 of the iron core and the bottom 331 of the magnetic frame to abut the magnet assembly from both sides, the magnet assembly can be well limited without other structures.
  • the magnetic frame 33 and the magnet assembly 32 form a first magnetic circuit system, which drives the first voice coil 23 to reciprocate, thereby driving the first dome 214 and the first sound membrane 212 to vibrate and emit sound toward the first sounding direction.
  • the magnet assembly 32 and the iron core 31 form a second magnetic circuit system, which drives the second voice coil 24 to reciprocate, thereby driving the second dome 224 and the second sound membrane 222 to vibrate and emit sound toward the second sounding direction.
  • FIG. 4 is a schematic structural diagram of the bracket in the sounding device shown in FIG. 1 .
  • the bracket 1 includes a bearing portion 16 for bearing the magnetic frame 33 .
  • the bearing portion 16 may be annular.
  • the bearing portion 16 includes a second side wall 162 disposed around the magnetic frame 33 , and the second side wall 162 is used to limit the circumference of the magnetic frame 33 direction of movement.
  • the length of the second side wall 162 in the vibration direction of the first diaphragm 21 can be equal to or similar to the length of the magnetic frame 33 in the vibration direction of the first diaphragm 21 , so as to limit the magnetic frame and prevent the magnetic frame 33 from shaking. .
  • One end of the bearing portion 16 facing the first diaphragm 21 can be connected to the lug 335 of the magnetic frame for carrying the magnetic frame 33 .
  • the bracket 1 further includes a main body 12 and a spaced connecting frame 14 protruding from the main body 12 toward the bearing portion 16 .
  • the connecting frame 14 connects the main body 12 and the bearing portion 16 .
  • the bracket 1 can be in the shape of a circular ring, and is used for accommodating the bearing portion 16 , the connecting frame 14 and the magnetic circuit system 3 .
  • the connecting frame 14 can be a plurality of connecting plates arranged at intervals, and the spaced cavities are used for placing related structures.
  • the bracket 1 further includes a fixing portion arranged around the bracket body, the fixing portion is in the shape of a circular ring, and is provided with a plurality of connecting holes for fixing the bracket 1 to the required components.
  • the fixing portion and the bracket body 12 may be integrally formed, or the bracket body 12 may be provided with a plurality of connection holes that are the same as the fixing portion, for detachably connecting the bracket body and the fixing portion.
  • FIG. 5 is a schematic structural diagram of a spring wave in the sounding device shown in FIG. 2
  • FIG. 6 is a structural schematic diagram of a first connecting piece and a second connecting piece in the sounding device shown in FIG. 2
  • FIG. 7 is a FIG. 2 is a schematic structural diagram of the first connecting piece, the elastic wave and the second connecting piece in the sounding device.
  • the vibration system 2 may further include an elastic wave 25 disposed between the first diaphragm 21 and the second diaphragm 22 , and the elastic wave 25 is installed on the connecting frame 14 .
  • the shape of the elastic wave 25 may be similar to that of the first sound film 212, and the elastic wave may include a first sub-section 252 and a second sub-section 254, and the first sub-section 252 may be two concave sections arranged oppositely or adjacently arranged.
  • the second sub-portion 254 can also be two concave parts arranged oppositely or adjacently, wherein, the four concave parts can be connected by two annular structures to form a whole. During manufacture, Can be integrally formed.
  • the vibration system 2 further includes a first connecting member 26 connected to the first diaphragm 21 and a second connecting member 27 connected to the second diaphragm 22 .
  • the first connecting member 26 includes a first connecting member 26 connected to the first diaphragm 21 A first annular portion 262 connected to the diaphragm 21 and a first extension portion 264 extending from the first annular portion 262 to the elastic wave 25.
  • the first extension portion 264 may also include two tabs disposed opposite or adjacent to each other. .
  • the first extension portion 264 is connected to the first sub-portion 252 .
  • the two protruding pieces of the first extension portion 264 are stably connected to the edges of the two concave portions of the first sub-portion 252 respectively.
  • the second connecting member 27 includes a second annular portion 272 connected to the second diaphragm 22 and a second extending portion 274 extending from the second annular portion 272 to the elastic wave.
  • the second extending portion 274 may also include an opposite or opposite Two tabs set adjacent to each other.
  • the second extension portion 274 is connected to the second sub-portion 254 .
  • the two protruding pieces of the second extension portion 274 are stably connected to the edges of the two concave portions of the second sub-portion 254 respectively.
  • the elastic waves are respectively connected with the first vibrating film by the first connecting piece and the second vibrating film with the second connecting piece, so that the vibrations of the first vibrating film and the second vibrating film can be balanced, so as to stabilize the sound.
  • the magnetic circuit system Compared with the related art, by setting the magnetic circuit system to include an iron core, a magnet assembly sleeved on the iron core, and a magnetic frame sleeved on the magnet assembly, the first voice coil is disposed between the magnetic frame and the magnet assembly, and the second voice coil is arranged between the magnetic frame and the magnet assembly.
  • the coil is arranged between the magnet assembly and the iron core.
  • the magnetic circuit system composed of the magnetic frame and the magnet assembly provides the driving force for the first voice coil, thereby driving the first diaphragm to vibrate and sound
  • the magnetic circuit system composed of the magnet assembly and the iron core provides the driving force for the second voice coil, thereby driving the first voice coil.
  • the second diaphragm vibrates to produce sound.
  • the abutment limit of the magnet assembly can be realized without redundant components, so that the magnet assembly is securely installed and the structure of the magnetic circuit system is simple.

Abstract

一种发声装置(100)，包括支架(1)以及固接于所述支架(1)的振动系统(2)和磁路系统(3)，所述振动系统(2)包括第一振膜(21)、与所述第一振膜(21)相对设置的第二振膜(22)、驱动所述第一振膜(21)的第一音圈(23)和驱动所述第二振膜(22)的第二音圈(24)，所述磁路系统(3)包括铁芯(31)、套设于所述铁芯(31)的磁体组件(32)以及套设于所述磁体组件(32)的磁框(33)，所述第一音圈(23)设置于所述磁框(33)与所述磁体组件(32)之间，所述第二音圈(24)设置于所述磁体组件(32)和所述铁芯(31)之间。使得在同一磁框(33)空间范围内具有两套磁路结构，分别驱动第一振膜(21)和第二振膜(22)朝向不用方向振动发声，在节省空间的同时也使磁路系统(3)的利用效率提高，从而提高发声装置(100)的发声性能。

Description

发声装置
本发明要求于2020年11月30日提交中国专利局、申请号为202011384307.8、发明名称为“发声装置”的中国专利申请的优先权，其全部内容通过引用结合在本发明中。
技术领域
本发明涉及声电转换领域，尤其涉及一种发声装置。
 背景技术
现有技术的发声装置包括磁路系统、音圈和支架，支架用于承载磁路系统和音圈。当音圈中流过电信号时，通电的音圈在磁路系统产生的磁场中受安培力的作用，从而导致音圈振动，音圈振动带动膜片振动，这种振动将机械能转换为声能信号辐射出去，通过空气媒介的传播到达人耳，一般情况下我们就可听到相关声音信息。
目前对于磁路系统的利用效率不高，从而影响发声装置的发声性能。
因此，有必要提供一种改进的发声装置来解决上述问题。
 技术问题
本发明的目的在于提供一种发声装置，通过对磁路系统进行改进设计可以提升磁路系统的使用效率，进而提高发声装置的发声性能。
 技术解决方案
本发明的技术方案如下：一种发声装置，包括支架以及固接于支架的振动系统和磁路系统，振动系统包括第一振膜、与第一振膜相对设置的第二振膜、驱动第一振膜的第一音圈和驱动第二振膜的第二音圈，磁路系统包括铁芯、套设于铁芯的磁体组件以及套设于磁体组件的磁框，第一音圈设置于磁框与磁体组件之间，第二音圈设置于磁体组件和铁芯之间。
优选的，振动系统还包括设置于磁框与磁体组件之间的第一音圈骨架和设置于磁体组件和铁芯之间的第二音圈骨架，第一音圈骨架朝向第一振膜的一端与第一振膜连接，第一音圈骨架远离第一振膜的一端连接第一音圈，第一音圈缠绕设置在第一音圈骨架上，第二音圈骨架朝向第二振膜的一端与第二振膜连接，第二音圈骨架远离第二振膜的一端连接第二音圈，第二音圈缠绕设置在第二音圈骨架上。
优选的，磁框包括承载磁体组件的底部和围绕底部设置的第一侧壁，第一侧壁和底部形成容纳磁体组件和铁芯的容纳腔，底部设有开口，第二音圈骨架穿设于开口，并设置于磁体组件和铁芯之间。
优选的，铁芯包括基底和位于基底中心区域的柱体，磁体组件套设柱体，铁芯的基底与磁框的底部配合限位磁体组件。
优选的，磁体组件包括第一磁体、第二磁体和将第一磁体和第二磁体间隔设置的极芯，第一磁体、极芯和第二磁体沿第一振膜的振动方向设置。
优选的，第一振膜包括第一球顶和连接于第一球顶外周的第一音膜，第一音膜的外边缘固定于支架，第一球顶与第一音圈骨架连接，第二振膜包括第二球顶和连接于第二球顶外周的第二音膜，第二音膜的外边缘固定于支架，第二球顶与第二音圈骨架连接。
优选的，支架包括承载磁框的承载部，承载部包括围绕磁框设置的第二侧壁，第二侧壁限位磁框。
优选的，磁框包括朝向第一振膜的第一端部和自第一端部朝远离铁芯方向延伸的凸耳，凸耳与承载部连接。
优选的，振动系统还包括设置于第一振膜和第二振膜之间的弹波，支架还包括本体和自本体朝向承载部突出设置的连接骨架，连接骨架连接本体和承载部，弹波安装于连接骨架。
优选的，振动系统还包括与第一振膜相连的第一连接件和与第二振膜相连的第二连接件，弹波包括相互连接的第一子部和第二子部，第一连接件包括与第一振膜连接的第一圆环部和自第一圆环部向弹波延伸的第一延伸部，第一延伸部与第一子部连接，第二连接件包括与第二振膜连接的第二圆环部和自第二圆环部向弹波延伸的第二延伸部，第二延伸部与第二子部连接。
 有益效果
本发明的有益效果在于：磁路系统包括铁芯、套设于铁芯的磁体组件以及套设于磁体组件的磁框，第一音圈设置于磁框与磁体组件之间，第二音圈设置于磁体组件和铁芯之间。磁框和磁体组件组成的磁路系统为第一音圈提供驱动力，从而带动第一振膜振动发声，磁体组件和铁芯组成的磁路系统为第二音圈提供驱动力，从而带动第二振膜振动发声。使得在同一磁框空间范围内具有两套磁路结构，分别驱动第一振膜和第二振膜朝向不用方向振动发声，在节省空间的同时也使磁路系统的利用效率提高，从而提高发声装置的发声性能。
 附图说明
图1为本发明实施例提供的发声装置的结构示意图；
图2为图1所示发声装置的爆炸结构示意图；
图3为图1所示发声装置沿A-A方向的剖面图；
图4为图1所示发声装置中支架的结构示意图；
图5为图2所示发声装置中弹波的结构示意图；
图6为图2所示发声装置中第一连接件和第二连接件的结构示意图；
图7为图2所示发声装置中第一连接件、弹波和第二连接件的结构示意图；
图8为图2所示发声装置中磁框的结构示意图。
 本发明的实施方式
下面结合附图和实施方式对本发明作进一步说明。
请参阅图1至图3，图1为本发明实施例提供的发声装置的结构示意图；图2为图1所示发声装置的爆炸结构示意图；图3为图1所示发声装置沿A-A方向的剖面图。本发明提供了一种发声装置100，其包括支架1以及固接于支架1的振动系统2和磁路系统3，支架1可以为振动系统2和磁路系统3提供支撑，磁路系统3可以驱动振动系统2振动发声。
振动系统2包括第一振膜21、与第一振膜21相对设置的第二振膜22、驱动第一振膜21的第一音圈23和驱动第二振膜22的第二音圈24。
振动系统2还包括设置于磁框33与磁体组件32之间的第一音圈骨架28和设置于磁体组件32和铁芯31之间的第二音圈骨架29。第一音圈骨架28和第二音圈骨架29均呈圆环形。第一音圈骨架28朝向第一振膜21的一端与第一振膜21连接，第一音圈骨架28远离第一振膜21的一端连接第一音圈23，第一音圈23缠绕设置在第一音圈骨架28上，用于第一音圈23振动通过第一音圈骨架28带动第一振膜21振动以朝第一发声方向发声。第二音圈骨架29朝向第二振膜22的一端与第二振膜22连接，第二音圈骨架29远离第二振膜22的一端连接第二音圈24，第二音圈24缠绕设置在第二音圈骨架29上，用于第二音圈24振动通过第二音圈骨架29带动第二振膜22振动以朝第二发声方向发声。其中，第二发声方向和第一发声方向为不同的方向且为相反的方向。
第一振膜21包括第一球顶214和连接于第一球顶214外周的第一音膜212，第一球顶214可以为圆环形，第一音膜212具有外边缘、内边缘和设置于外边缘和内边缘之间的凹部，第一音膜212还包括由内边缘形成的第一圆形腔，第一球顶214卡设在第一音膜212的内边缘，以形成封闭的第一发声侧结构。第一音膜212的外边缘固定于支架1，第一球顶214与第一音圈骨架28连接，使得在第一音圈骨架28的带动下第一球顶214和第一音膜212振动发声。
第二振膜22包括第二球顶224和连接于第二球顶224外周的第二音膜222，第二球顶224可以为圆环形，第二音膜222具有外边缘、内边缘和设置于外边缘和内边缘之间的凹部，第二音膜222还包括由内边缘形成的第二圆形腔，第二球顶224卡设在第二音膜222的内边缘，以形成封闭的第二发声侧结构。第二音膜222的外边缘固定于支架1，第二球顶224与第二音圈骨架29连接，使得在第二音圈骨架29的带动第二球顶224和第二音膜222振动发声。
其中，为了方便制造，可以将第二球顶224和第一球顶214设置为形状尺寸均相同的结构，也可以将第二音膜222和第一音膜212设置为形状尺寸均相同的结构。
磁路系统3包括铁芯31、套设于铁芯31的磁体组件32、以及套设于磁体组件32的磁框33，第一音圈23设置于磁框33与磁体组件32之间。示例性地，第一音圈23和第二音圈24可以为中空的柱状，第一音圈23插设于磁框33和磁体组件32之间的间隙中，第二音圈24插设于磁体组件32与铁芯31之间的间隙中。磁框33与磁体组件32驱动第一音圈23和第一振膜21振动以自第一振膜21背离第一音圈23方向发声，第二音圈24设置于磁体组件32和铁芯31之间，磁体组件32与铁芯31驱动第二音圈24和第二振膜22振动以自所述第二振膜22背离第二音圈24方向发声。通过将铁芯31、磁体组件32和磁框33嵌套设置，可以节省空间，在有限的磁框尺寸范围内，设置两套磁路系统，增大磁路的使用效率。
其中，磁体组件32包括第一磁体322、第二磁体324和将第一磁体322和第二磁体324间隔设置的极芯326，第一磁体322、极芯326和第二磁体324沿第一振膜21的振动方向设置，用以将第一磁体322和磁框33组成的第一磁路系统、与第二磁体324和铁芯31组成的第二磁路系统间隔开，相互之间不产生干扰。其中，极芯326可以为圆环形，套设于第二音圈24，第一音圈23套设于极芯326。第一音圈23、极芯326和第二音圈24相互嵌套。
在一些实施例中，第一磁体322可以为圆环形，第一磁体322的厚度大于极芯326的厚度，为便于制造，第二磁体324也可以为圆环形，第一磁体322和第二磁体324的厚度可以相同也可以不同，以使得第一磁体322与磁框33相互作用产生第一磁路系统和第二磁体324与铁芯31相互作用产生第二磁路系统。第一磁体322和第二磁体324相对于极芯326对称设置，以节省空间。
请参阅图8，图8为图2所示发声装置中磁框的结构示意图。磁框33可以包括承载磁体组件的底部331和围绕底部设置的第一侧壁332，第一侧壁332和底部形成容纳磁体组件和铁芯的磁框容纳腔333，例如，磁框33可以为圆环形。磁框33底部设有开口334，开口334可以为圆形，第二音圈骨架29穿设于圆形开口，并设置于磁体组件32和铁芯31之间。磁框33的底部331可以承载磁体组件32，不需要其他结构来承载磁体组件，减少了结构件。
其中，磁框33还包括朝向第一振膜21的第一端部336和自第一端部336朝远离铁芯31方向延伸的凸耳335，凸耳335可以为圆环形，凸耳335与支架1连接。磁框33利用凸耳335设置在支架1上，并且凸耳335与支架1可以通过胶水、卡接等方式固定连接，可以方便的将磁框33固设于支架1内。
铁芯31包括基底312和位于基底中心区域的柱体314，基底312和柱体314均为圆环形，且柱体314的厚度大于基底的厚度，在一些实施例中，柱体314的厚度等于磁体组件的厚度加磁框底部开口的厚度。磁体组件32套设柱体314，铁芯31的基底312与磁框33的底部331配合限位磁体组件32。利用铁芯的基底312和磁框的底部331从两侧抵接磁体组件，不需要其他结构就可以很好的限位磁体组件。
磁框33和磁体组件32组成第一磁路系统，驱动第一音圈23往复运动，进而带动第一球顶214和第一音膜212振动朝向第一发声方向发声。
磁体组件32和铁芯31组成第二磁路系统，驱动第二音圈24往复运动，进而带动第二球顶224和第二音膜222振动朝向第二发声方向发声。
请参阅图4，图4为图1所示发声装置中支架的结构示意图。支架1包括承载磁框33的承载部16，承载部16可以为圆环形，承载部16包括围绕磁框33设置的第二侧壁162，第二侧壁162用以限位磁框33圆周方向的运动。第二侧壁162在第一振膜21振动方向上的长度可以与磁框33在第一振膜21振动方向上的长度相等或相近，从而很好的限位磁框，防止磁框33晃动。
其中，承载部16朝向第一振膜21的一端可以与磁框的凸耳335连接，用以承载磁框33。
请继续参阅图4，支架1还包括本体12和自本体12朝向承载部16突出的间隔设置的连接骨架14，连接骨架14连接本体12和承载部16。支架1可以为圆环形，用以容纳承载部16、连接骨架14和磁路系统3。连接骨架14可以为间隔设置的多个连接板，间隔的空腔用于放置相关结构。
支架1还包括围绕支架本体设置的固定部，固定部呈圆环形，其上设置有多个连接孔，用于将支架1固定于所需部件上。固定部与支架本体12可以一体成型，也可以在支架本体12设置与固定部相同的多个连接孔，用于可拆卸连接支架本体和固定部。
请参阅图5至图7，图5为图2所示发声装置中弹波的结构示意图，图6为图2所示发声装置中第一连接件和第二连接件的结构示意图，图7为图2所示发声装置中第一连接件、弹波和第二连接件的结构示意图。
振动系统2还可以包括设置于第一振膜21和第二振膜22之间的弹波25，弹波25安装于连接骨架14。弹波25形状可以与第一音膜212相似，并且弹波可以包括第一子部252和第二子部254，第一子部252可以为相对设置的两个凹部，也可以为相邻设置的两个凹部，相对应的，第二子部254也可以为相对设置或相邻设置的两个凹部，其中，四个凹部可以通过两个圆环形结构相连组成一个整体，在制造时，可一体成型。
请继续参阅图5至图7，振动系统2还包括与第一振膜21相连的第一连接件26和与第二振膜22相连的第二连接件27，第一连接件26包括与第一振膜21连接的第一圆环部262和自第一圆环部262向弹波25延伸的第一延伸部264，第一延伸部264也可以包括相对或相邻设置的两个凸片。第一延伸部264与第一子部252连接，具体地，第一延伸部264的两个凸片分别于第一子部252的两个凹部的边缘稳定连接。第二连接件27包括与第二振膜22连接的第二圆环部272和自第二圆环部272向弹波延伸的第二延伸部274，第二延伸部274也可以包括相对或相邻设置的两个凸片。第二延伸部274与第二子部254连接，具体地，第二延伸部274的两个凸片分别于第二子部254的两个凹部的边缘稳定连接。将弹波分别利用第一连接件与第一振膜相连以及利用第二连接件与第二振膜相连，可以平衡第一振膜和第二振膜的振动，以使发声稳定。
与相关技术相比，通过设置磁路系统包括铁芯、套设于铁芯的磁体组件以及套设于磁体组件的磁框，第一音圈设置于磁框与磁体组件之间，第二音圈设置于磁体组件和铁芯之间。磁框和磁体组件组成的磁路系统为第一音圈提供驱动力，从而带动第一振膜振动发声，磁体组件和铁芯组成的磁路系统为第二音圈提供驱动力，从而带动第二振膜振动发声。使得在同一磁框空间范围内具有两套磁路结构，分别驱动第一振膜和第二振膜朝向不用方向振动发声，在节省空间的同时也使磁路系统的利用效率提高，从而提高发声装置的发声性能。
此外，通过将磁体组件对顶设置于磁框和铁芯之间，不需要多余部件就能实现磁体组件的抵接限位，使得磁体组件的安装牢靠、磁路系统的结构简单。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (10)

  1. 一种发声装置，包括支架以及固接于所述支架的振动系统和磁路系统，所述振动系统包括第一振膜、与所述第一振膜相对设置的第二振膜、驱动所述第一振膜的第一音圈和驱动所述第二振膜的第二音圈，其特征在于，所述磁路系统包括铁芯、套设于所述铁芯的磁体组件以及套设于所述磁体组件的磁框，所述第一音圈设置于所述磁框与所述磁体组件之间，所述第二音圈设置于所述磁体组件和所述铁芯之间。
  2. 根据权利要求1所述的发声装置，其特征在于，所述振动系统还包括设置于所述磁框与所述磁体组件之间的第一音圈骨架和设置于所述磁体组件和所述铁芯之间的第二音圈骨架，所述第一音圈骨架朝向第一振膜的一端与第一振膜连接，所述第一音圈骨架远离所述第一振膜的一端连接第一音圈，所述第一音圈缠绕设置在第一音圈骨架上，所述第二音圈骨架朝向第二振膜的一端与第二振膜连接，所述第二音圈骨架远离所述第二振膜的一端连接第二音圈，所述第二音圈缠绕设置在第二音圈骨架上。
  3. 根据权利要求2所述的发声装置，其特征在于，所述磁框包括承载所述磁体组件的底部和围绕所述底部设置的第一侧壁，所述第一侧壁和所述底部形成容纳所述磁体组件和所述铁芯的容纳腔，所述底部设有开口，所述第二音圈骨架穿设于所述开口，并设置于所述磁体组件和所述铁芯之间。
  4. 根据权利要求3所述的发声装置，其特征在于，所述铁芯包括基底和位于基底中心区域的柱体，所述磁体组件套设所述柱体，所述铁芯的基底与所述磁框的底部配合限位所述磁体组件。
  5. 根据权利要求1所述的发声装置，其特征在于，所述磁体组件包括第一磁体、第二磁体和将所述第一磁体和第二磁体间隔设置的极芯，所述第一磁体、所述极芯和所述第二磁体沿所述第一振膜的振动方向设置。
  6. 根据权利要求1所述的发声装置，其特征在于，所述第一振膜包括第一球顶和连接于所述第一球顶外周的第一音膜，所述第一音膜的外边缘固定于所述支架，所述第一球顶与所述第一音圈骨架连接，所述第二振膜包括第二球顶和连接于所述第二球顶外周的第二音膜，所述第二音膜的外边缘固定于所述支架，所述第二球顶与所述第二音圈骨架连接。
  7. 根据权利要求1所述的发声装置，其特征在于，所述支架包括承载所述磁框的承载部，所述承载部包括围绕所述磁框设置的第二侧壁，所述第二侧壁限位所述磁框。
  8. 根据权利要求7所述的发声装置，其特征在于，所述磁框包括朝向第一振膜的第一端部和自所述第一端部朝远离所述铁芯方向延伸的凸耳，所述凸耳与所述承载部连接。
  9. 根据权利要求7所述的发声装置，其特征在于，所述振动系统还包括设置于所述第一振膜和所述第二振膜之间的弹波，所述支架还包括本体和自本体朝向所述承载部突出设置的连接骨架，所述连接骨架连接所述本体和所述承载部，所述弹波安装于所述连接骨架。
  10. 根据权利要求9所述的发声装置，其特征在于，所述振动系统还包括与所述第一振膜相连的第一连接件和与所述第二振膜相连的第二连接件，所述弹波包括相互连接的第一子部和第二子部，所述第一连接件包括与所述第一振膜连接的第一圆环部和自所述第一圆环部向所述弹波延伸的第一延伸部，所述第一延伸部与所述第一子部连接，所述第二连接件包括与所述第二振膜连接的第二圆环部和自所述第二圆环部向所述弹波延伸的第二延伸部，所述第二延伸部与所述第二子部连接。
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