WO2022206046A1 - 发声装置 - Google Patents

发声装置 Download PDF

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Publication number
WO2022206046A1
WO2022206046A1 PCT/CN2021/139425 CN2021139425W WO2022206046A1 WO 2022206046 A1 WO2022206046 A1 WO 2022206046A1 CN 2021139425 W CN2021139425 W CN 2021139425W WO 2022206046 A1 WO2022206046 A1 WO 2022206046A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
central
voice coil
magnetic conductive
diaphragm
Prior art date
Application number
PCT/CN2021/139425
Other languages
English (en)
French (fr)
Inventor
蔡晓东
李波波
刘松
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 WO2022206046A1 publication Critical patent/WO2022206046A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—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
    • H04R9/025—Magnetic circuit
    • H04R9/027—Air gaps using a magnetic fluid
    • 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
    • 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

Definitions

  • the present invention relates to the technical field of acoustic-electrical conversion, in particular to a sound-generating device.
  • a central magnetic conductive plate is usually used to support the central magnetic circuit assembly, that is, a central magnetic body is respectively provided on two opposite sides of the central magnetic conductive plate, and the outer circumference of each central magnet forms a magnetic
  • the voice coils on both sides extend into the two magnetic gaps respectively.
  • the central magnetic conductive plate will occupy the size (thickness) of the sounding device along the depth direction of the magnetic gap.
  • the thickness of the sounding device needs to be made smaller, the thickness of the central magnet will be reduced, thereby reducing the magnetic gap.
  • the depth of the voice coil reduces the vibration space of the voice coil, which seriously affects the acoustic performance.
  • the main purpose of the present invention is to provide a sounding device, which aims to increase the vibration space of the voice coil in the magnetic gap while realizing double-sided sounding.
  • the sounding device proposed by the present invention includes:
  • a magnetic circuit system includes a central magnetic circuit structure and a side magnetic circuit structure, the central magnetic circuit structure includes a central magnet, two central magnetic conducting plates respectively arranged on the upper and lower sides of the central magnet, each The central magnetic conductive plate includes a first magnetic conductive portion corresponding to the central magnet, and at least one of the central magnetic conductive plates includes a connection portion extending from the edge of the first magnetic conductive portion to the outside, and the connection portion is connected with the first magnetic conductive portion.
  • the casing or the side magnetic circuit structure is connected; the side magnetic circuit structure is fixed on the casing, and the side magnetic circuit structure includes a plurality of side magnets arranged around the central magnet and a plurality of side magnets arranged on the side Side magnetic conductive plates on the upper and lower sides of the magnet; a magnetic gap is formed between the central magnet and the central magnetic conductive plate and the side magnets and the side magnetic conductive plates;
  • a first vibrating system comprising a first vibrating membrane and an annular voice coil disposed on the first vibrating membrane, the first vibrating membrane is mounted on the housing, and the annular voice coil extends into the magnetic gap;
  • a second vibrating system includes a second vibrating membrane and a flat voice coil, the second vibrating membrane is mounted on the housing and is located on the side of the magnetic circuit system away from the first vibrating membrane, the flat voice The coil is arranged on the side of the second diaphragm facing the first diaphragm and extends into the magnetic gap, and the flat voice coil and the connecting portion are distributed at intervals in the circumferential direction of the central magnet.
  • the two central magnetic conductive plates include a first central magnetic conductive plate and a second central magnetic conductive plate, and the first central magnetic conductive plate includes a first central magnetic conductive plate separately disposed on the first central magnetic conductive plate.
  • the two connecting parts on two opposite sides of the magnetic part.
  • the first central magnetic conductive plate is located on the side of the central magnet close to the second diaphragm; the side magnetic conductive plate includes a first side corresponding to the first central magnetic conductive plate a magnetic conductive plate, and a second side magnetic conductive plate corresponding to the second central magnetic conductive plate; the two connecting parts are connected with the corresponding first side magnetic conductive plate.
  • the first central magnetic conducting plate is arranged on a side of the central magnet close to the first vibrating film, and both of the connecting parts include a first connecting section and a second connecting section, the first connecting section.
  • a connecting segment is connected to the edge of the first magnetic conductive portion and extends toward the second diaphragm, and the second connecting segment is connected to a side of the first connecting segment away from the first magnetic conductive portion , and extend toward the side of the central magnet;
  • the side magnets corresponding to the two connecting parts include upper and lower parts, and the two connecting parts are located between the upper and lower parts;
  • the annular voice coil extends into the A portion of the magnetic gap is located on a side of the first connecting segment facing away from the other central magnet.
  • the magnetic gap includes two opposite first gaps and two opposite second gaps, and the two first gaps and the two second gaps alternate in sequence along the circumferential direction of the central magnet. distribution, the flat voice coil extends into the first gap, and the connecting portion is provided at the junction of the first gap and the second gap.
  • both of the central magnetic conductive plates include the first magnetic conductive portion and the connection portion, the central magnet is arranged between the two first magnetic conductive portions, and each of the connections The connecting parts of the two central magnetic conductive plates are arranged opposite to each other, and the connecting parts of the two central magnetic conductive plates are bent towards each other. bent and connected to each other.
  • the side magnetic conducting plate includes an annular connecting portion and a side magnetic conducting portion, the annular connecting portion is connected to the casing, the side magnetic conducting portion is connected to the inner side of the annular connecting portion, and the The sides of the side magnets facing the first vibrating film and the second vibrating film are both provided with the side magnetic conducting parts.
  • the second vibration system further includes a connection bracket, and the connection bracket connects the second diaphragm and the flat voice coil.
  • the connecting bracket includes a first fixing part and two second fixing parts located at both ends of the first fixing part, the first fixing part is connected to the second diaphragm, and the second fixing part is
  • the second vibration system includes two of the connecting brackets and two of the flat voice coils; one end of one of the flat voice coils is connected to one of the connecting brackets a second fixing part of the flat voice coil, the other end of the flat voice coil is connected to a second fixing part of the other connecting bracket; the two ends of the other flat voice coil are respectively connected to the other of the two connecting brackets the second fixed part.
  • the first vibration system further includes a first centering support piece, the first centering support piece elastically connects the annular voice coil and the housing; and/or, the second vibration system A second centering support piece is also included, the second centering support piece elastically connects the flat voice coil and the housing.
  • the technical solution of the present invention is that the first vibration system and the second vibration system are respectively arranged on both sides of the magnetic circuit system, and both the annular voice coil of the first vibration system and the flat voice coil of the second vibration system can extend into the magnetic circuit system.
  • both the first vibration system and the second vibration system can vibrate and sound, thereby realizing the double-sided sound of the sounding device.
  • the central magnet is arranged on the first magnetic conductive portion of the central magnetic conductive plate, and the connecting portion of the central magnetic conductive plate is extended to the outside from the edge of the central magnet, so that the connecting portion is connected to the side magnets.
  • a circuit structure or a connection housing is used, and then the flat voice coil and the connection part are distributed at intervals in the circumferential direction of the central magnet.
  • the fixing of the central magnet can be realized by connecting the connecting part to the casing or the side magnetic circuit structure, and it is also avoided that when there is a connecting part between the flat voice coil and the annular voice coil, the connecting part occupies the magnetic gap in the depth direction (That is, the vibration direction), so that at least the size of the flat voice coil extending into the magnetic gap can be increased, thereby increasing the vibration space of the flat voice coil in the depth direction of the magnetic gap, which can improve the acoustic performance of the sounding device.
  • FIG. 1 is an exploded view of an embodiment of a sound-emitting device of the present invention
  • Fig. 2 is the cutaway schematic diagram of the sounding device in Fig. 1 after being assembled;
  • Fig. 3 is the enlarged view of A place in Fig. 2;
  • Fig. 4 is an exploded view of the magnetic circuit system in Fig. 1;
  • Fig. 5 is the structural representation of the center magnetic conducting plate in Fig. 4;
  • FIG. 6 is an exploded view of another embodiment of the sounding device of the present invention.
  • Fig. 7 is an exploded view of the magnetic circuit system in Fig. 6;
  • FIG. 8 is an exploded view of another embodiment of the sounding device of the present invention.
  • Fig. 9 is an exploded view of the magnetic circuit system in Fig. 8.
  • Fig. 10 is the cutaway schematic diagram of the magnetic circuit system in Fig. 8;
  • Fig. 11 is the structural schematic diagram of the side magnetic conducting plate of the magnetic circuit system in Fig. 8;
  • FIG. 12 is a schematic structural diagram of the housing in FIG. 1;
  • FIG. 13 is a schematic structural diagram of a flat voice coil, a connecting bracket and a second centering support piece in FIG. 1;
  • FIG. 14 is a schematic structural diagram of the connecting bracket in FIG. 13 .
  • connection shell 30 first vibration system 12 pressure relief hole 31 first diaphragm 20 Magnetic circuit system 32 ring voice coil twenty one Magnetic gap 33 first centering piece 211 first gap 40 Second Vibration System 212 second gap 41 second diaphragm twenty two center magnet 42 flat voice coil twenty three side magnet 43 connecting bracket twenty four Center magnetic plate 431 first fixed part 240 The first center magnetic conductive plate 432 second fixing part 241 The first magnetic conductive part 433 first connection board 243 connector 434 second connection board
  • the directional indications are only used to explain the relationship between various components in a specific posture If the specific posture changes, the directional indication also changes accordingly.
  • the present invention provides a sounding device for use in electronic equipment, and the electronic equipment can be a mobile phone, a tablet computer, a computer, or a wearable device such as a watch.
  • the sound generating device includes a housing 10 , a magnetic circuit system 20 , a first vibration The system 30 and the second vibration system 40, the magnetic circuit system 20 includes a central magnetic circuit structure and a side magnetic circuit structure, and the central magnetic circuit structure includes a central magnet 22 and two central magnetic conducting plates 24 respectively arranged on the upper and lower sides of the central magnet 22 .
  • Each central magnetic conductive plate 24 includes a first magnetic conductive portion 241 corresponding to the central magnet 22 , and at least one central magnetic conductive plate 24 includes a connection portion 243 extending from the edge of the first magnetic conductive portion 2 to the outside.
  • the connection portion 243 It is connected with the casing 10 or the side magnetic circuit structure.
  • the side magnetic circuit structure is fixed on the housing 10, and the side magnetic circuit structure includes a plurality of side magnets 23 arranged around the central magnet 22 and side magnetic conducting plates 26 arranged on the upper and lower sides of the side magnet 23; the central magnet 22 and the central magnetic conducting plate A magnetic gap 21 is formed between the side magnet 23 and the side magnetic conducting plate 26 .
  • the first vibrating system 30 includes a first vibrating membrane 31 and an annular voice coil 32 disposed on the first vibrating membrane 31 .
  • the first vibrating membrane 31 is mounted on the housing 10 , and the annular voice coil 32 extends into the magnetic gap 21 .
  • the second vibrating system 40 includes a second vibrating membrane 41 and a flat voice coil 42.
  • the second vibrating membrane 41 is mounted on the housing 10 and is located on the side of the magnetic circuit system 20 away from the first vibrating membrane 31, and the flat voice coil 42 is provided on the
  • the second diaphragm 41 faces one side of the first diaphragm 31 and extends into the magnetic gap 21 .
  • the flat voice coil 42 and the connecting portion 243 are distributed at intervals in the circumferential direction of the central magnet 22 .
  • the casing 10 is provided with openings at both ends, the first diaphragm 31 is installed at the opening at one end of the casing 10 , the second diaphragm 41 is installed at the opening at the other end of the casing 10 , and the annular voice coil 32 is provided On the side of the first diaphragm 31 facing the second diaphragm 41 , the flat voice coil 42 is provided on the side of the second diaphragm 41 facing the first diaphragm 31 .
  • the row of the first diaphragm 31 and the second diaphragm 41 The cloth direction is the vibration direction of the first diaphragm 31 and the second diaphragm 41 .
  • the central magnet 22 is disposed between the first diaphragm 31 and the second diaphragm 41 , and the annular voice coil 32 at least partially extends into the magnetic gap 21 , which is equivalent to that the central magnet 22 is partially located inside the annular voice coil 32 .
  • the flat voice coil 42 has two wire segments spaced along the arrangement direction of the first diaphragm 31 and the second diaphragm 41. The wire segment of the flat voice coil 42 away from the second diaphragm 41 extends into the magnetic gap 21, and the flat voice coil 42 extends into the magnetic gap 21. The wire segment of the coil 42 close to the second diaphragm 41 is located outside the magnetic gap 21 .
  • the flat voice coil 42 and the annular voice coil 32 protrude into the magnetic gap 21 from two opposite sides of the center magnet 22, and the flat voice coil 42 and the annular voice coil 32 are spaced apart along the depth direction of the magnetic gap 21.
  • the annular voice coils 32 do not interfere with each other when they vibrate simultaneously.
  • the flat voice coil 42 and the connecting portion 243 are distributed in the circumferential direction of the central magnet 22 , that is, the orthographic projection of the flat voice coil 42 and the connecting portion 243 on the second diaphragm 41 is spaced along the circumferential direction of the diaphragm.
  • the first vibration system 30 and the second vibration system 40 may vibrate individually or simultaneously. Electrical signals may be input to the flat voice coil 42 and the annular voice coil 32, respectively.
  • the technical solution of the present invention is that the first vibration system 30 and the second vibration system 40 are respectively arranged on both sides of the magnetic circuit system 20, and the annular voice coil 32 of the first vibration system 30 and the flat voice coil 42 of the second vibration system 40 are both It can extend into the magnetic gap 21 of the magnetic circuit system 20, and after the annular voice coil 32 of the first vibration system 30 and the flat voice coil 42 of the second vibration system 40 are energized, the first vibration system 30 and the second vibration system 40 are both energized. It can vibrate and sound, so as to realize double-sided sound of the sound-emitting device.
  • the flat voice coil 42 and the connecting portion 243 are spaced apart in the circumferential direction of the central magnet 22 .
  • the central magnet 22 can be fixed by connecting the connecting portion 243 to the housing 10 or the side magnetic circuit structure, and it is also avoided that when the connecting portion 243 exists between the flat voice coil 42 and the annular voice coil 32, the connecting portion 243 In the case of occupying the space of the magnetic gap 21 in the depth direction (ie, the vibration direction), that is, the situation where the connecting portion 243 and the flat voice coil 42 share space in the depth direction of the magnetic gap 21 is avoided, so that the magnetic field of the flat voice coil 42 can be increased.
  • the vibration space in the gap 21 can improve the vibration effect of the vibration system, thereby improving the acoustic performance of the sound-generating device.
  • the second vibration system 40 includes two flat voice coils 42 , the two flat voice coils 42 are respectively disposed on two opposite sides of the central magnet 22 , and the two flat voice coils 42 are both disposed on the second diaphragm 41 , Both can extend into the magnetic gap 21 , so that the second diaphragm 41 can be uniformly stressed during vibration, reduce the possibility of polarization of the second vibration system 40 , and improve the sound performance of the second vibration system 40 .
  • the second vibration system 40 may also include only one flat voice coil 42 or three, four or more flat voice coils 42 .
  • the two central magnetic conductive plates 24 include a first central magnetic conductive plate 240 and a second central magnetic conductive plate 242 .
  • the magnetic conductive plate 240 includes two connecting portions 243 respectively disposed on two opposite sides of the first magnetic conductive portion 241 of the first central magnetic conductive plate 240 . That is, the two central magnetic conductive plates 24 are the first central magnetic conductive plate 240 and the second central magnetic conductive plate 242 respectively, and the central magnet 22 is disposed between the first central magnetic conductive plate 240 and the second central magnetic conductive plate 242 .
  • the first central magnetic conducting plate 240 can be connected to the casing 10 (side magnetic circuit structure) through the connecting portions 243 on the two opposite sides of the first magnetic conducting portion 241 , which not only increases the size between the first central magnetic conducting plate 240 and the casing 10 ( The connection area of the side magnetic circuit structure) also makes the two opposite sides of the first magnetic conductive portion 241 receive uniform force, thereby improving the stability of the first central magnetic conductive plate 240 and ensuring the stability of the entire magnetic circuit system 20 during the vibration process. .
  • the first central magnetic conductive plate 240 may be provided on the side of the central magnet 22 facing the second diaphragm 41 , or may be provided on the side of the central magnet 22 facing the first diaphragm 31 .
  • the connecting portion 243 may be connected only on one side of the first magnetic conducting portion 241 .
  • the first central magnetic conductive plate 240 is located on the side of the central magnet 22 close to the second diaphragm 41 , and the side magnetic conductive plate 26 includes and the first central magnetic conductive plate 240
  • the corresponding first magnetic conductive plates 260 and the second magnetic conductive plates 263 corresponding to the second central magnetic conductive plates 242 are connected with the corresponding first magnetic conductive plates 260 . That is, the side magnetic conductive plates 26 on the upper and lower sides of the side magnet 23 are the first magnetic conductive plate 260 and the second magnetic conductive plate 263 respectively.
  • the two magnetic conductive plates 263 are disposed correspondingly to the second central magnetic conductive plate 242 .
  • the first magnetic conductive plates 260 and the first central magnetic conductive plate 240 can be connected as a whole, that is, the first magnetic conductive plates 260 and the casing can be connected together.
  • the first central magnetic conductive plate 240 can be fixed to the casing 10 through the first side magnetic conductive plate 260 . Therefore, when installing the magnetic circuit system 20, there is no need to additionally connect the first central magnetic conductive plate 240 to the housing 10, which is beneficial to simplify the installation process and improve the production efficiency.
  • the first central magnetic conducting plate 240 is disposed on the side of the central magnet 22 close to the second diaphragm 41, so that the connecting portion 243 can also be disposed on the side of the central magnet 22 close to the second diaphragm 41, for example, the first center
  • the magnetic conductive plate 240 is in the shape of a flat plate.
  • the space along the vibration direction can increase the vibration space of the annular voice coil 32 and the flat voice coil 42 in the depth direction of the magnetic gap 21 without increasing the thickness of the central magnet 22, thereby improving the acoustic performance of the sounding device.
  • the space in the width direction of the magnetic gap 21 can be prevented from being occupied by the connecting portion 243 , which is beneficial to reduce the width or length of the sounding device.
  • the first magnetic conductive portion 241 , the connecting portion 243 and the first magnetic conductive plate 260 can be integrally formed, so as to facilitate the manufacturing and molding of the first central magnetic conductive plate 240 and the first magnetic conductive plate 260 and reduce the first center magnetic conductive plate.
  • the connection process of the plate 240 and the first side magnetic conductive plate 260 can also be used between the first magnetic conducting portion 241 and the connecting portion 143 and between the connecting portion 243 and the first side magnetic conducting plate 260 .
  • the first central magnetic conductive plate 240 is arranged on the side of the central magnet 22 close to the first diaphragm 31 .
  • the two connecting parts 243 both include a first connecting segment 244 and a second connecting segment 245 .
  • the first connecting segment 244 is connected to the edge of the first magnetic conducting part 241 and extends toward the second diaphragm 41 .
  • the second connecting section 245 is connected to the side of the first connecting section 244 away from the first magnetic conducting portion 241 and extends laterally toward the center magnet 22 .
  • the side magnets 23 corresponding to the two connecting portions 243 include an upper and a lower portion.
  • the connecting portion 243 is located between the upper and lower parts.
  • the portion of the annular voice coil 32 extending into the magnetic gap 21 is located on the side of the first connecting segment 244 away from the other central magnet 22 . That is to say, the central magnet 22 is disposed between the two first connecting sections 244 , and the two second connecting sections 245 extend in directions away from each other and are connected to the housing 10 respectively. In this way, the contact area between the central magnet 22 and the first central magnetic conducting plate 240 is increased, and the connection stability of the central magnet 22 can be improved.
  • the annular voice coil 32 can be avoided to provide an avoidance space for the annular voice coil 32 to protrude into the magnetic gap 21 , so that the size of the annular voice coil 32 protruding into the magnetic gap 21 is larger.
  • the magnetic gap 21 includes two opposite first gaps 211 and two opposite second gaps 212 , and the two first gaps 211 and the two second gaps 212 are located along the center magnet 22 are alternately distributed in the circumferential direction, the flat voice coil 42 extends into the first gap 211 , and the connecting portion 243 is provided at the junction of the first gap 211 and the second gap 212 .
  • the sound-generating device may be in a direction or a circle, that is, the central magnet 22 may be in a square or circular shape, or the central magnet 22 may be in a tri-deformation, a pentagon, a hexagon, or an octagon, and so on.
  • the central magnet 22 is substantially square, it is equivalent to the magnetic gap 21 where the connecting portion 243 is provided at the corner of the central magnet 22 , so that the number of flat voice coils 42 can be easily set according to requirements, for example, the two first gaps 211 And the flat voice coils 42 are arranged in the two second gaps 212, which can facilitate the increase of the number of the flat voice coils 42, and can avoid that when there is a connecting portion 243 between the flat voice coil 42 and the annular voice coil 32, the connecting portion 243 occupies the magnetic field.
  • the gap 21 is in the space in the depth direction (ie, the vibration direction).
  • the central magnetic conductive plate 24 may be provided on the side of the central magnet 22 away from the first vibrating film 31 , or may be provided on the side of the central magnet 22 facing the first vibrating film 31 .
  • the two central magnetic conductive plates 24 both include a first magnetic conductive portion 241 and a connecting portion 243 , the central magnet 22 is disposed between the two first magnetic conductive portions 241 , and each connecting portion 243 is disposed in the The intersection of the first gap 211 and the second gap 212 .
  • the two central magnetic conductive plates 24 are both connected to the housing 10 , so that a central magnetic conductive plate 24 is respectively provided on two opposite sides of the central magnet 22 for support, which can improve the stability of the magnetic circuit system 20 .
  • the connecting portions 243 of the two central magnetic conducting plates 24 are disposed opposite to each other, and the connecting portions 243 of the two central magnetic conducting plates 24 are bent toward each other, and connected to each other. That is, the connecting portion 243 of the central magnetic conducting plate 24 is bent and arranged in the direction of the other central magnetic conducting plate 24 to be connected with the connecting portion 243 of the other central magnetic conducting plate 24 . Stability between magnetic plates 24.
  • the connecting portion 243 may also be straight, that is, the connecting portion 243 is not bent.
  • the side magnetic conductive plate 26 includes an annular connecting portion 261 and a side magnetic conductive portion. 262, the annular connecting portion 261 is connected to the housing 10, the side magnetic conducting portion 262 is connected to the inner side of the annular connecting portion 261, and the side magnet 23 facing the first vibrating film 31 and the surface of the second vibrating film 41 are provided with side magnetic conducting portions. 262. That is, a plurality of side magnetic conductive parts 262 can be provided inside the annular connecting part 261 , and the number of the side magnetic conductive parts 262 can be set according to the number of the side magnets 23 .
  • the annular connecting portion 261 and the side magnetic conducting portion 262 are integrally formed. Compared with the way of arranging a plurality of independent side magnetizing plates 26, the side magnetic conducting portion 262 and the annular connecting portion 261 can be connected as a whole, which can reduce the number of sound-emitting devices. The number of parts is reduced, which is beneficial to reduce the assembly process and improve the production efficiency. Moreover, by connecting the outer periphery of the annular connecting portion 261 to the housing 10 , the connection stability of the side magnetic conducting plate 26 can be improved.
  • the side magnetic conducting plate 26 and the casing 10 are integrally injection-molded, so that the structural strength of the casing 10 can be improved through the side magnetic conducting 26 , and the connection between the casing 10 and the magnetic circuit system 20 can be improved.
  • the stability can also reduce the number of parts and components in the assembly process of the sounding device and reduce the assembly process.
  • the casing 10 and the side magnetic conductive plate 26 may be glued or fixed together by means of screws or the like.
  • the housing 10 includes two connecting shells 11 , the connecting shells 11 are open at both ends, and the open ends of the two connecting shells 11 are connected. That is to say, the two connection shells 11 are arranged separately. When assembling, the open ends of the two connection shells 11 are connected. In this way, during installation, the part of the magnetic circuit system 20 can be installed in the connection shell 11, and then the two connection shells can be connected together. 11 is connected, which can facilitate the assembly of the housing 10 and the magnetic circuit system 20 .
  • the housing 10 may also be an integral structure.
  • the side magnetic conductive plate 26 (annular connection portion) is integrally formed with the connecting shell 11 , for example, the side magnetic conductive plate 26 is used as an insert to be integrally injection molded with the connecting shell 11 , and the shell can be lifted by the central magnetic conductive plate 24
  • the structural strength of 10 can improve the connection stability between the housing 10 and the central magnetic conducting plate 24, and can also reduce the number of parts and components in the assembly process of the sounding device, and reduce the assembly process.
  • the central magnetic conductive plate 24 (connecting part) and the connecting shell 11 are integrally injection-molded.
  • the central magnetic conductive plate 24 is used as an insert to be integrally injection-molded with the connecting shell 11, which is beneficial to reduce the number of parts in the assembly process. quantity, reducing the assembly process.
  • the central magnetic conducting plate 24 (connecting portion) is sandwiched between the two connecting shells 11 .
  • the two central magnetic conducting plates 24 are integrally formed with the two connecting shells 11 in one-to-one correspondence, or the connecting portions 243 of the two central magnetic conducting plates 24 are sandwiched between the two connecting shells 11 . between the shells 11. This is beneficial to reduce the number of parts and components in the assembly process and reduce the assembly process.
  • a pressure relief hole 12 is provided at the joint of the two connection shells 11 , and the pressure relief hole 12 communicates with the inner cavity of the casing 10 .
  • the pressure relief hole 12 may be provided in one of the connection shells 11 , or both of the two connection shells 11 are provided with a gap at one end connected to each other, and the two gaps form the pressure relief hole 12 . In this way, the pressure relief hole 12 is provided at the joint of the two connection shells 11 , which is convenient for forming.
  • the second vibration system 40 further includes a connecting bracket 43 , and the connecting bracket 43 is connected to the second diaphragm 41 and the flat voice coil 42 .
  • the second diaphragm 41 includes a center portion, a ring portion surrounding the outer edge of the center portion, and an edge portion surrounding the outer edge of the ring portion, wherein the ring portion and the edge portion are both ring-shaped shape.
  • the connecting bracket 43 is connected to the side of the second diaphragm 41 facing the center magnet 22 , that is, the connecting bracket 43 is connected to the side of the center portion facing the center magnet 22 , and the flat voice coil 42 is connected to the connecting bracket 43 away from the second diaphragm 41 .
  • the size of the flat voice coil 42 can also be increased to ensure that the wire segment of the flat voice coil 42 can extend into the magnetic gap 21 .
  • the second vibration system 40 includes two connecting brackets 43 and two flat voice coils 42, and each connecting bracket 43 includes a first fixing portion 431 and a The two second fixing portions 432 at both ends of the first fixing portion 431 , the first fixing portion 431 is connected to the second diaphragm 41 , and the second fixing portions 432 extend in a direction away from the second diaphragm 41 .
  • One end of one of the flat voice coils 42 is connected to a second fixing portion 432 of a connecting bracket 43
  • the other end of the flat voice coil 42 is connected to a second fixing portion 432 of the other connecting bracket 43 .
  • Two ends of the other flat voice coil 42 are respectively connected to the other second fixing parts 432 of the two connecting brackets 43 .
  • the two flat voice coils 42 are disposed opposite to each other, and the two connecting brackets 43 are disposed opposite to each other. Two ends of one of the flat voice coils 42 are respectively connected to one of the second fixing portions 432 of the two connecting brackets 43 , and two ends of the other flat voice coil 42 are respectively connected to the other second fixing portion 432 of the two connecting brackets 43 ,
  • the two connecting brackets 43 and the two flat voice coils 42 are connected in a frame shape. This arrangement is equivalent to connecting the two connecting brackets 43 and the two flat voice coils 42 as a whole, which not only increases the connection stability of the connecting bracket 43 and the flat voice coil 42 , but also increases the distance between the two flat voice coils 42 .
  • connection bracket 43 may be connected to only one flat voice coil 42 , or only one connection bracket 43 may be provided, and two flat voice coils 42 may be connected to the connection bracket 43 .
  • the first vibration system 30 further includes a first centering support piece 33 , the first centering support piece 33 is connected to the annular voice coil 32 and the housing 10 , and the annular voice coil is elastically connected by the first centering support piece 33 .
  • the ring 32 and the housing 10 can reduce the offset movement of the annular voice coil 32 in the direction perpendicular to the vibration direction, thereby effectively reducing the polarization phenomenon of the voice coil and improving the listening yield of the sound generating device.
  • the first centering support piece 33 includes a first fixing section, a first elastic section and a first supporting section. Two ends of the first elastic section are respectively connected to the first fixing section and the first supporting section.
  • the segment is connected to the housing 10 and the first support segment is connected to the annular voice coil 32 .
  • the first fixing section is installed at the notch of the connecting shell 11 for forming the pressure relief hole 12 , which can not only provide a space for the installation of the first centering support piece 33 , but also facilitate the forming of the pressure relief hole 12. Realize the pressure relief function.
  • the second vibration system 40 further includes a second centering support piece 44 , and the second centering support piece 44 is connected to the flat voice coil 42 and the housing 10 .
  • the second centering support piece 44 By arranging the second centering support piece 44 to elastically connect the flat voice coil 42 and the housing 10, the offset movement of the flat voice coil 42 in the direction perpendicular to the vibration direction can be reduced, thereby effectively reducing the polarization phenomenon of the voice coil and improving the sound generating device listening rate.
  • the second centering support piece 44 includes a second fixing segment 443, a second elastic segment 442 and a second supporting segment 441, and two ends of the second elastic segment 442 are respectively connected to the second fixing segment 443 and the second supporting segment Section 441 , the second fixed section 443 is connected to the housing 10 , and the second support section 441 is connected to the flat voice coil 42 .
  • the second support section 441 may be directly connected to the flat voice coil 42, or may be connected to the portion of the connecting bracket 43 that is connected to the flat voice coil 42 (the second fixed portion 432), or the second support section 441 may be connected to the flat voice coil at the same time 42 and the portion of the connecting bracket 43 to which the flat voice coil 42 is connected (the second fixing portion 432 ).
  • the second fixing section 443 is installed at the notch of the connecting shell 11 for forming the pressure relief hole 12 , so that it can not only provide space for the installation of the second centering support piece 44 , but also facilitate the forming of the pressure relief hole 12. Realize the pressure relief function.
  • the second fixing portion 432 includes a first connecting plate 433 and a second connecting plate 434.
  • the first connecting plate 433 is connected to the first fixing portion 431 and extends away from the second diaphragm 41, and the second connecting plate 433 is connected to the first fixing portion 431.
  • the plate 434 connects the side of the first connecting plate 433 away from the first fixing portion 431 and extends in a direction away from the other second fixing portion 432 , that is, the second connecting plates 434 of the two second fixing portions 432 face away from each other.
  • the flat voice coil 42 is installed on the surface of the first connecting plate 433 facing the other first connecting plate 433, and the second centering support piece 44 (the second supporting section 441) is connected to the second connecting plate 434 away from the first fixed the surface of the portion 431 (the second diaphragm 41 ).
  • the second fixing portion 432 can fix both the flat voice coil 42 and the second centering support piece 44 , and can avoid the flat voice coil 42 and the second centering support piece 44 (the second support section 441 ).
  • the flat voice coil 42 can also be in contact with the second centering support piece 44 (the second support section 441 ), which increases the selectivity of assembly and facilitates the assembly of the sounding device.
  • the present invention also provides an electronic device, the electronic device includes a casing and a sounding device.
  • the specific structure of the sounding device refers to the above-mentioned embodiments. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it has at least the above-mentioned embodiments. All the beneficial effects brought by the technical solution will not be repeated here.
  • the sound generating device is arranged in the casing.
  • the electronic device may be a mobile phone, a tablet computer, a computer, or a wearable device such as a watch.
  • the housing has an installation cavity
  • the sound-emitting device is installed in the installation cavity
  • the installation cavity is divided into a first acoustic cavity and a second acoustic cavity
  • the first diaphragm communicates with the first acoustic cavity
  • the second diaphragm communicates with the second acoustic cavity
  • the shell is provided with two sound holes, one of which is communicated with the first sound cavity, and the other sound hole is communicated with the second sound cavity.
  • the volume can be increased.
  • only one sound outlet hole may be provided, and the sound outlet hole communicates with the first sound cavity and the second sound cavity.

Abstract

本发明公开一种发声装置，包括壳体、磁路系统、第一振动系统和第二振动系统，磁路系统包括中心磁路结构和固定于壳体的边磁路结构，中心磁路结构包括中心磁体和两个中心导磁板，每个中心导磁板包括与中心磁体对应的第一导磁部，至少一个中心导磁板包括连接于第一导磁部边缘的连接部，连接部与壳体或边磁路结构连接，中心磁体和中心导磁板与边磁体和边导磁板之间形成磁间隙。第一振动系统包括第一振膜和设于第一振膜的环形音圈。第二振动系统包括第二振膜和设于第二振膜的扁平音圈，第二振膜位于磁路系统背离第一振膜的一侧，扁平音圈与连接部在中心磁体的周向间隔分布。本发明技术方案能够实现双面发声的同时，增大音圈在磁间隙中的振动空间。

Description

发声装置 技术领域
本发明涉及声电转换技术领域，特别涉及一种发声装置。
背景技术
在目前的双面发声器件中，通常使用一个中心导磁板来支撑中心磁路组件，即在中心导磁板的两相对侧分别设有一个中心磁体，每一个中心磁体的外周均形成一个磁间隙，两侧的音圈分别伸入两个磁间隙中。然而如此设置时，中心导磁板会占用发声器件沿磁间隙深度方向的尺寸(厚度)，在需要使发声器件的厚度较小时，则会导致中心磁体的厚度减小，进而减小了磁间隙的深度，导致音圈的振动空间减小，严重影响声学性能。
发明内容
本发明的主要目的是提出一种发声装置，旨在实现双面发声的同时，增大音圈在磁间隙中的振动空间。
为实现上述目的，本发明提出的发声装置，包括：
壳体；
磁路系统，所述磁路系统包括中心磁路结构和边磁路结构，所述中心磁路结构包括中心磁体、分别设于所述中心磁体上下两侧的两个中心导磁板，每个所述中心导磁板包括与所述中心磁体对应的第一导磁部，至少一个所述中心导磁板包括由第一导磁部的边缘向外侧延伸设置的连接部，所述连接部与所述壳体或所述边磁路结构连接；所述边磁路结构固定于所述壳体，所述边磁路结构包括环绕所述中心磁体设置的多个边磁体以及设于所述边磁体上下两侧的边导磁板；所述中心磁体和所述中心导磁板与所述边磁体和边导磁板之间形成磁间隙；
第一振动系统，包括第一振膜和设于所述第一振膜的环形音圈，所述第一振膜安装于所述壳体，所述环形音圈伸入所述磁间隙；以及，
第二振动系统，包括第二振膜和扁平音圈，所述第二振膜安装于所述壳体，并位于所述磁路系统背离所述第一振膜的一侧，所述扁平音圈设于所述第二振膜朝向所述第一振膜的一侧，并伸入所述磁间隙，所述扁平音圈与所述连接部在所述中心磁体的周向间隔分布。
可选地，所述两个中心导磁板包括第一中心导磁板和第二中心导磁板，所述第一中心导磁板包括分设于所述第一中心导磁板的第一导磁部的两相对侧的两所述连接部。
可选地，所述第一中心导磁板位于所述中心磁体的靠近所述第二振膜的一侧；所述边导磁板包括与所述第一中心导磁板对应的第一边导磁板，和与所述第二中心导磁板对应的第二边导磁板；两所述连接部与对应的第一边导磁板连接。
可选地，所述第一中心导磁板设于所述中心磁体的靠近所述第一振膜的一侧，两所述连接部均包括第一连接段和第二连接段，所述第一连接段连接于所述第一导磁部的边缘，并朝向所述第二振膜延伸，所述第二连接段连接于所述第一连接段远离所述第一导磁部的一侧，并朝所述中心磁体的侧向延伸；与两所述连接部对应的边磁体包括上下两个部分，两所述连接部位于所述上下两个部分之间；所述环形音圈伸入所述磁间隙的部分位于所述第一连接段背离另一所述中心磁体的一侧。
可选地，所述磁间隙包括相对的两个第一间隙和相对的两个第二间隙，两个所述第一间隙和两个所述第二间隙沿所述中心磁体的周向依次交替分布，所述扁平音圈伸入所述第一间隙，所述连接部设于所述第一间隙和所述第二间隙的交接处。
可选地，两个所述中心导磁板均包括所述第一导磁部和所述连接部，所述中心磁体设于两个所述第一导磁部之间，每一所述连接部均设于所述第一间隙和所述第二间隙的交接处；两个所述中心导磁板的连接部相对设置，且两个所述中心导磁板的连接部呈相互朝向弯折的弯折状，并相互连接。
可选地，所述边导磁板包括环形连接部和边导磁部，所述环形连接部与所述壳体连接，所述边导磁部连接于所述环形连接部的内侧，所述边磁体朝向所述第一振膜和所述第二振膜的表面均设有所述边导磁部。
可选地，所述第二振动系统还包括连接支架，所述连接支架连接所述第 二振膜和所述扁平音圈。
可选地，所述连接支架包括第一固定部和分设于所述第一固定部两端的两个第二固定部，所述第一固定部连接所述第二振膜，所述第二固定部朝远离所述第二振膜的方向延伸；所述第二振动系统包括两个所述连接支架和两个所述扁平音圈；其中一个所述扁平音圈的一端连接一个所述连接支架的一个第二固定部，所述扁平音圈的另一端连接另一个所述连接支架的一个第二固定部；另一个所述扁平音圈的两端分别连接两个所述连接支架的另一个第二固定部。
可选地，所述第一振动系统还包括第一定心支片，所述第一定心支片弹性连接所述环形音圈和所述壳体；和/或，所述第二振动系统还包括第二定心支片，所述第二定心支片弹性连接所述扁平音圈和所述壳体。
本发明技术方案通过在磁路系统的两侧分别设置第一振动系统和第二振动系统，且第一振动系统的环形音圈和第二振动系统的扁平音圈均能伸入磁路系统的磁间隙中，向第一振动系统的环形音圈和第二振动系统扁平音圈通电后，使得第一振动系统和第二振动系统均能振动发声，从而实现发声装置双面发声。同时，在磁路系统中，通过将中心磁体设于中心导磁板的第一导磁部，并使得中心导磁板的连接部于中心磁体的边缘向外侧延伸，以使连接部连接边磁路结构或连接壳体，再将扁平音圈与连接部在中心磁体的周向上间隔分布。如此既能通过连接部与壳体或与边磁路结构的连接而实现中心磁体的固定，也避免了扁平音圈和环形音圈之间存在连接部时，连接部占用磁间隙在深度方向(即振动方向)的空间的情况，从而至少可以增大扁平音圈伸入磁间隙的尺寸，进而增加扁平音圈在磁间隙深度方向上的振动空间，能提升发声装置的声学性能。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的 附图。
图1为本发明发声装置一实施例的爆炸图；
图2为图1中发声装置组装后的剖切示意图；
图3为图2中A处的放大图；
图4为图1中磁路系统的爆炸图；
图5为图4中中心导磁板的结构示意图；
图6为本发明发声装置另一实施例的爆炸图；
图7为图6中磁路系统的爆炸图；
图8为本发明发声装置又一实施例的爆炸图；
图9为图8中磁路系统的爆炸图；
图10为图8中磁路系统的剖切示意图；
图11为图8中磁路系统的边导磁板的结构示意图；
图12为图1中壳体的结构示意图；
图13为图1中扁平音圈、连接支架和第二定心支片的结构示意图；
图14为图13中连接支架的结构示意图。
附图标号说明：
标号 名称 标号 名称
10 壳体 262 边导磁部
11 连接壳 30 第一振动系统
12 泄压孔 31 第一振膜
20 磁路系统 32 环形音圈
21 磁间隙 33 第一定心支片
211 第一间隙 40 第二振动系统
212 第二间隙 41 第二振膜
22 中心磁体 42 扁平音圈
23 边磁体 43 连接支架
24 中心导磁板 431 第一固定部
240 第一中心导磁板 432 第二固定部
241 第一导磁部 433 第一连接板
243 连接部 434 第二连接板
244 第一连接段 44 第二定心支片
245 第二连接段 441 第二支撑段
242 第二中心导磁板 442 第二弹性段
26 边导磁板 443 第二固定段
260 第一边导磁板 263 第二边导磁板
261 环形连接部    
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，全文中出现的“和/或”的含义为，包括三个并列的方案，以“A和/或B为例”，包括A方案，或B方案，或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种发声装置，用于电子设备，电子设备可以为手机、平板电脑、电脑或如手表等可穿戴设备。
在本发明实施例中，请结合参考图1至图5、或者结合参考图6和图7、或者结合参考图8和图9，该发声装置包括壳体10、磁路系统20、第一振动系统30和第二振动系统40，磁路系统20包括中心磁路结构和边磁路结构，中心磁路结构包括中心磁体22、分别设于中心磁体22上下两侧的两个中心导磁板24。每个中心导磁板24包括与中心磁体22对应的第一导磁部241，至少一个中心导磁板24包括由第一导磁部2的边缘向外侧延伸设置的连接部243，连接部243与壳体10或边磁路结构连接。边磁路结构固定于壳体10，边磁路结构包括环绕中心磁体22设置的多个边磁体23以及设于边磁体23上下两侧的边导磁板26；中心磁体22和中心导磁板24与边磁体23和边导磁板26之间形成磁间隙21。
第一振动系统30包括第一振膜31和设于第一振膜31的环形音圈32，第一振膜31安装于壳体10，环形音圈32伸入磁间隙21。第二振动系统40包括第二振膜41和扁平音圈42，第二振膜41安装于壳体10，并位于磁路系统20背离第一振膜31的一侧，扁平音圈42设于第二振膜41朝向第一振膜31的一侧，并伸入磁间隙21，扁平音圈42与连接部243在中心磁体22的周向间隔分布。
本实施例中，壳体10呈两端开口设置，第一振膜31安装于壳体10的一端开口处，第二振膜41安装于壳体10的另一端开口处，环形音圈32设于第一振膜31朝向第二振膜41的一侧，扁平音圈42设于第二振膜41朝向第一振膜31的一侧，第一振膜31和第二振膜41的排布方向即为第一振膜31和第二振膜41的振动方向。中心磁体22设于第一振膜31和第二振膜41之间，环形音圈32至少部分伸入磁间隙21，相当于中心磁体22部分位于环形音圈32内侧。扁平音圈42具有沿第一振膜31和第二振膜41的排布方向间隔分布的两个导线段，扁平音圈42远离第二振膜41的导线段伸入磁间隙21，扁平音圈42靠近第二振膜41的导线段位于磁间隙21外。即相当于扁平音圈42和环形音圈32从中心磁体22的两相对侧伸入磁间隙21，且扁平音圈42和环形音圈32沿磁间隙21的深度方向间隔，扁平音圈42和环形音圈32在同时振动时互不干涉。扁平音圈42与连接部243在中心磁体22的周向间隔分布时，即扁平音圈42与连接部243在第二振膜41上的正投影沿振膜的周向间隔。其中，第一振动系统30和第二振动系统40可以单独振动，也可以同时 振动。可以向扁平音圈42和环形音圈32分别输入电信号。
本发明技术方案通过在磁路系统20的两侧分别设置第一振动系统30和第二振动系统40，且第一振动系统30的环形音圈32和第二振动系统40的扁平音圈42均能伸入磁路系统20的磁间隙21中，向第一振动系统30的环形音圈32和第二振动系统40扁平音圈42通电后，使得第一振动系统30和第二振动系统40均能振动发声，从而实现发声装置双面发声。同时，在磁路系统20中，通过将中心磁体22设于中心导磁板24的第一导磁部241，并使得中心导磁板24的连接部243于中心磁体22的边缘向外侧延伸，以使连接部243连接边磁路结构或连接壳体10，再将扁平音圈42与连接部243在中心磁体22的周向上间隔分布。如此既能通过连接部243与壳体10或与边磁路结构的连接而实现中心磁体22的固定，也避免了扁平音圈42和环形音圈32之间存在连接部243时，连接部243占用磁间隙21在深度方向(即振动方向)的空间的情况，即避免了连接部243和扁平音圈42在磁间隙21的深度方向共用空间的情况，从而可以增大扁平音圈42在磁间隙21中的振动空间，提升振动系统的振动效果，进而能提升发声装置的声学性能。
一实施例中，第二振动系统40包括两个扁平音圈42，两个扁平音圈42分设于中心磁体22的两相对侧，且两个扁平音圈42均设于第二振膜41，并均能伸入磁间隙21，如此能够保证第二振膜41在振动时受力均匀，降低第二振动系统40发生偏振的可能，提升第二振动系统40的发声性能。当然，在其它实施例中，第二振动系统40也可以仅包括一个扁平音圈42或者包括三个、四个或更多数量的扁平音圈42。
请结合参考图1和图4、或者结合参考图6和图7，一实施例中，两个中心导磁板24包括第一中心导磁板240和第二中心导磁板242，第一中心导磁板240包括分设于第一中心导磁板240的第一导磁部241的两相对侧的两连接部243。即两个中心导磁板24分别为第一中心导磁板240和第二中心导磁板242，中心磁体22设于第一中心导磁板240和第二中心导磁板242之间。第一中心导磁板240能够通过第一导磁部241两相对侧的连接部243与壳体10(边磁路结构)连接，既增大了第一中心导磁板240与壳体10(边磁路结构)的连接面积，也使得第一导磁部241两相对侧受力均匀，从而能提升第一中心导磁板240的稳定性，保证整个磁路系统20在振动过程中保持稳定。 在本实施例中，第一中心导磁板240可以设于中心磁体22朝向第二振膜41的一侧，也可以设于中心磁体22朝向第一振膜31的一侧。当然，在其它实施例中，也可以仅在第一导磁部241的其中一侧连接部243。
请结合参考图6和图7，一实施例中，第一中心导磁板240位于中心磁体22的靠近第二振膜41的一侧，边导磁板26包括与第一中心导磁板240对应的第一边导磁板260，和与第二中心导磁板242对应的第二边导磁板263，两连接部243与对应的第一边导磁板260连接。即边磁体23上下两侧的边导磁板26分别为第一边导磁板260和第二边导磁板263，第一边导磁板260与第一中心导磁板240对应设置，第二边导磁板263与第二中心导磁板242对应设置。通过将两连接部243与对应的第一边导磁板240连接，可以使得第一边导磁板260与第一中心导磁板240连接为一体，即第一边导磁板260与壳体10固定时，第一中心导磁板240能通过第一边导磁板260与壳体10固定。从而在安装磁路系统20时，不需要额外将第一中心导磁板240与壳体10连接，有利于简化安装工序，提升生产效率。
而将第一中心导磁板240设于中心磁体22靠近第二振膜41的一侧，从而可以将连接部243也设于中心磁体22靠近第二振膜41的一侧，例如第一中心导磁板240呈平板状。如此相当于将连接部243设于中心磁体22的外侧，避免了连接部243占用磁间隙21沿振动方向的空间的情况，从而能够保证环形音圈32和扁平音圈42能够充分利用磁间隙21沿振动方向的空间，在不增加中心磁体22厚度的情况下，可以增大环形音圈32和扁平音圈42在磁间隙21深度方向上的振动空间，提升发声装置的声学性能。此外，还能避免连接部243占用磁间隙21宽度方向的空间，有利于减小发声装置的宽度或长度。
其中，第一导磁部241、连接部243以及第一边导磁板260可以一体成型，以便于第一中心导磁板240和第一边导磁板260制造成型，减少第一中心导磁板240和第一边导磁板260的连接工序。当然，也可以将第一导磁部241与连接部143之间、连接部243与第一边导磁板260之间也可以为焊接。
另外，不同于第一中心导磁板240设于中心磁体22靠近第二振膜41的一侧的实施例，结合参考图1至图5，在另一实施例中，第一中心导磁板240设于中心磁体22的靠近第一振膜31的一侧。两连接部243均包括第一连接段244和第二连接段245，第一连接段244连接于第一导磁部241的边缘，并 朝向第二振膜41延伸。第二连接段245连接于第一连接段244远离第一导磁部241的一侧，并朝中心磁体22的侧向延伸，与两连接部243对应的边磁体23包括上下两个部分，两连接部243位于该上下两个部分之间。环形音圈32伸入磁间隙21的部分位于第一连接段244背离另一中心磁体22的一侧。即相当于中心磁体22设于两个第一连接段244之间，而两个第二连接段245朝相互背离的方向延伸，并分别与壳体10连接。如此增大了中心磁体22与第一中心导磁板240的接触面积，能够提升中心磁体22连接稳定性。而且还能避让环形音圈32，为环形音圈32伸入磁间隙21提供避让空间，使得环形音圈32伸入磁间隙21的尺寸更大。
结合参考图8和图9一实施例中，磁间隙21包括相对的两个第一间隙211和相对的两个第二间隙212，两个第一间隙211和两个第二间隙212沿中心磁体22的周向依次交替分布，扁平音圈42伸入第一间隙211，连接部243设于第一间隙211和第二间隙212的交接处。其中，发声装置可以呈方向或圆形，即中心磁体22可以呈方形或圆形，或者中心磁体22呈三变形、五边形、六边形或八边形等等。当中心磁体22大致呈方形时，相当于连接部243设于中心磁体22的角部处的磁间隙21，如此能方便根据需求设置扁平音圈42的数量，例如可以在两个第一间隙211以及两个第二间隙212中均设置扁平音圈42，能够便于增加扁平音圈42的数量，而且能避免扁平音圈42和环形音圈32之间存在连接部243时，连接部243占用磁间隙21在深度方向(即振动方向)的空间的情况。本实施例中，中心导磁板24可以设于中心磁体22背离第一振膜31的一侧，也可以设于中心磁体22朝向第一振膜31的一侧。
在一实施例中，两个中心导磁板24均包括第一导磁部241和连接部243，中心磁体22设于两个第一导磁部241之间，每一连接部243均设于第一间隙211和第二间隙212的交接处。具体而言，两个中心导磁板24均与壳体10连接，如此在中心磁体22的两相对侧分别设有一个中心导磁板24进行支撑，能够提升磁路系统20的稳定性。
请结合参考图9和图10，一实施例中，两个中心导磁板24的连接部243相对设置，且两个中心导磁板24的连接部243呈相互朝向弯折的弯折状，并相互连接。即中心导磁板24的连接部243朝另一中心导磁板24的方向弯折设置，以与另一中心导磁板24的连接部243连接，如此能够增加中心磁体22 在两个中心导磁板24之间的稳定性。当然，在其它实施例中，连接部243也可以呈平直状，即连接部243不弯折。
请结合参考图1和图4，或者结合参考图6和图7，又或者参考图8、图9和图11，一实施例中，边导磁板26包括环形连接部261和边导磁部262，环形连接部261与壳体10连接，边导磁部262连接于环形连接部261的内侧，边磁体23朝向第一振膜31和第二振膜41的表面均设有边导磁部262。即可以在环形连接部261的内侧设置多个边导磁部262，边导磁部262的数量可以根据边磁体23的数量设置，如可以对应每一边磁体23设有一个边导磁部262。使得环形连接部261与边导磁部262一体成型，相较于设置多个独立边导磁板26的方式，如此可以使得边导磁部262与环形连接部261连接为一体，能够减少发声装置的零部件数量，从而有利于减少装配工序，提高生产效率。而且通过环形连接部261的外周缘与壳体10连接，能够提升边导磁板26的连接稳定性。
请参考图12，一实施例中，边导磁板26与壳体10一体注塑成型，如此能通过边导磁26提升壳体10的结构强度，能提升壳体10与磁路系统20的连接稳定性，还能减少发声装置在装配过程中的零部件数量，减少装配工序。当然，在其它实施例中，壳体10与边导磁板26可以粘接或通过螺钉等结构固定在一起。
请结合参考图1、图3和图12，一实施例中，壳体10包括两个连接壳11，连接壳11呈两端开口设置，两个连接壳11的开口端相连接。即两个连接壳11分体设置，装配时，将两个连接壳11的开口端相连接，如此在安装时，可以将磁路系统20的部分安装于连接壳11，再将两个连接壳11进行连接，能够便于壳体10与磁路系统20的装配。当然，在其它实施例中，壳体10也可以为一个整体结构。
一实施例中，边导磁板26(环形连接部)与连接壳11一体成型，例如将边导磁板26作为嵌件与连接壳11一体注塑成型，能通过中心导磁板24提升壳体10的结构强度，能提升壳体10与中心导磁板24的连接稳定性，还能减少发声装置在装配过程中的零部件数量，减少装配工序。
一实施例中，中心导磁板24(连接部)与连接壳11一体注塑成型，例如将中心导磁板24作为嵌件与连接壳11一体注塑成型，如此有利于减少装配 过程中的零部件数量，减少装配工序。一实施例中，中心导磁板24(连接部)夹设于两个连接壳11之间。
一实施例中，两个中心导磁板24(边导磁板26)分别与两个连接壳11一一对应一体成型，或者两个中心导磁板24的连接部243夹设于两个连接壳11之间。如此有利于减少装配过程中的零部件数量，减少装配工序。
一实施例中，两个连接壳11的连接处设有泄压孔12，泄压孔12与壳体10内腔连通。其中，泄压孔12可以设于其中一个连接壳11，或者两个连接壳11相互连接的一端均设有缺口，两个缺口形成泄压孔12。如此在两个连接壳11的连接处设有泄压孔12的方式，成型方便。
请结合参考图1、图13和图14，一实施例中，第二振动系统40还包括连接支架43，连接支架43连接第二振膜41和扁平音圈42。具体而言，第二振膜41包括具有中心部、环设于中心部外边缘的折环部、以及环设于折环部外边缘的边缘部，其中，折环部和边缘部均呈环状。连接支架43连接于第二振膜41朝向中心磁体22的一侧，即连接支架43连接于中心部朝向中心磁体22的一侧，扁平音圈42连接于连接支架43远离第二振膜41的一侧，如此能够便于扁平音圈42的固定连接，提升扁平音圈42的稳定性。当然，在其它实施例中，也可以通过增加扁平音圈42的尺寸来保证扁平音圈42的导线段能伸入磁间隙21。
连接支架43的结构具有多种，例如，一实施例中，第二振动系统40包括两个连接支架43和两个扁平音圈42，每一个连接支架43均包括第一固定部431和分设于第一固定部431两端的两个第二固定部432，第一固定部431连接第二振膜41，第二固定部432朝远离第二振膜41的方向延伸。其中一个扁平音圈42的一端连接一个连接支架43的一个第二固定部432，扁平音圈42的另一端连接另一个连接支架43的一个第二固定部432。另一个扁平音圈42的两端分别连接两个连接支架43的另一个第二固定部432。
具体而言，两个扁平音圈42相对设置，两个连接支架43相对设置，两个扁平音圈42和两个连接支架43沿第二振膜41的周向依次交替分布。其中一个扁平音圈42的两端分别连接两个连接支架43的其中一个第二固定部432，另一个扁平音圈42的两端分别连接两个连接支架43的另外一个第二固定部432，使得两个连接支架43和两个扁平音圈42连接呈框状。如此设置， 相当于使得两个连接支架43和两个扁平音圈42连接为一体，既增加了连接支架43和扁平音圈42的连接稳定性，也增加了两个扁平音圈42之间的稳定性，能够降低第二振动系统40振动时扁平音圈42偏振的可能。当然，在其它实施例中，也可以将一个连接支架43仅对应连接一个扁平音圈42，或者仅设置一个连接支架43，将两个扁平音圈42连接于该连接支架43。
一实施例中，第一振动系统30还包括第一定心支片33，第一定心支片33连接环形音圈32和壳体10，通过设置第一定心支片33弹性连接环形音圈32和壳体10，能够降低环形音圈32朝垂直于振动方向的方向偏移运动，从而有效降低了音圈偏振现象，提高了发声装置的听音良率。一实施例中，第一定心支片33包括第一固定段、第一弹性段和第一支撑段，第一弹性段的两端分别连接第一固定段和第一支撑段，第一固定段与壳体10连接，第一支撑段与环形音圈32连接。一实施例中，第一固定段安装于连接壳11用于形成泄压孔12的缺口处，如此既能为第一定心支片33的安装提供让位，也能能便于成型泄压孔12，实现泄压功能。
一实施例中，第二振动系统40还包括第二定心支片44，第二定心支片44连接扁平音圈42和壳体10。通过设置第二定心支片44弹性连接扁平音圈42和壳体10，能够降低扁平音圈42朝垂直于振动方向的方向偏移运动，从而有效降低了音圈偏振现象，提高了发声装置的听音良率。一实施例中，第二定心支片44包括第二固定段443、第二弹性段442和第二支撑段441，第二弹性段442的两端分别连接第二固定段443和第二支撑段441，第二固定段443与壳体10连接，第二支撑段441与扁平音圈42连接。其中，第二支撑段441可以直接与扁平音圈42连接，也可以与连接支架43上连接扁平音圈42的部分(第二固定部432)连接，或者第二支撑段441同时连接扁平音圈42和连接支架43上连接扁平音圈42的部分(第二固定部432)。一实施例中，第二固定段443安装于连接壳11用于形成泄压孔12的缺口处，如此既能为第二定心支片44的安装提供让位，也能便于成型泄压孔12，实现泄压功能。
一实施例中，第二固定部432包括第一连接板433和第二连接板434，第一连接板433连接第一固定部431，并朝背离第二振膜41的方向延伸，第二连接板434连接第一连接板433远离第一固定部431的一侧，并朝远离另一第二固定部432的方向延伸，即两个第二固定部432的第二连接板434朝相 互背离的方向延伸，扁平音圈42安装于第一连接板433朝向另一个第一连接板433的表面，第二定心支片44(第二支撑段441)连接于第二连接板434背离第一固定部431(第二振膜41)的表面。如此设置，使得第二固定部432既能固定扁平音圈42，也能固定第二定心支片44，且可以避免扁平音圈42和第二定心支片44(第二支撑段441)相干涉，也可以将扁平音圈42和第二定心支片44(第二支撑段441)接触，增加了装配的可选择性，以便于发声装置的装配。
本发明还提出一种电子设备，该电子设备包括外壳和发声装置，该发声装置的具体结构参照上述实施例，由于本电子设备采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。其中，发声装置设于外壳内。电子设备可以为手机、平板电脑、电脑或如手表等可穿戴设备。
一实施例中，外壳具有安装腔，发声装置安装于安装腔，并将安装腔分隔为第一声腔和第二声腔，第一振膜与第一声腔连通，第二振膜与第二声腔连通，外壳设有两个出声孔，其中一个出声孔和第一声腔连通，另一个出声孔与第二声腔连通。如此设置，在第一振膜和第二振膜同向振动时，可以使两个出声孔出来的声波为相位相反的声波，以使得自两个出声孔出来的音波形成声偶极子，从而可以减小漏音的风险。而在第一振膜和第二振膜朝相反的方向振动时，可以增加出音量。当然，在其它实施例中，也可以仅设置一个出声孔，该出声孔连通第一声腔和第二声腔。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (10)

  1. 一种发声装置，其特征在于，包括：
    壳体；
    磁路系统，所述磁路系统包括中心磁路结构和边磁路结构，所述中心磁路结构包括中心磁体、分别设于所述中心磁体上下两侧的两个中心导磁板，每个所述中心导磁板包括与所述中心磁体对应的第一导磁部，至少一个所述中心导磁板包括由第一导磁部的边缘向外侧延伸设置的连接部，所述连接部与所述壳体或所述边磁路结构连接；所述边磁路结构固定于所述壳体，所述边磁路结构包括环绕所述中心磁体设置的多个边磁体以及设于所述边磁体上下两侧的边导磁板；所述中心磁体和所述中心导磁板与所述边磁体和边导磁板之间形成磁间隙；
    第一振动系统，包括第一振膜和设于所述第一振膜的环形音圈，所述第一振膜安装于所述壳体，所述环形音圈伸入所述磁间隙；以及，
    第二振动系统，包括第二振膜和扁平音圈，所述第二振膜安装于所述壳体，并位于所述磁路系统背离所述第一振膜的一侧，所述扁平音圈设于所述第二振膜朝向所述第一振膜的一侧，并伸入所述磁间隙，所述扁平音圈与所述连接部在所述中心磁体的周向间隔分布。
  2. 如权利要求1所述的发声装置，其特征在于，所述两个中心导磁板包括第一中心导磁板和第二中心导磁板，所述第一中心导磁板包括分设于所述第一中心导磁板的第一导磁部的两相对侧的两所述连接部。
  3. 如权利要求2所述的发声装置，其特征在于，所述第一中心导磁板位于所述中心磁体的靠近所述第二振膜的一侧；
    所述边导磁板包括与所述第一中心导磁板对应的第一边导磁板，和与所述第二中心导磁板对应的第二边导磁板；
    两所述连接部与对应的第一边导磁板连接。
  4. 如权利要求2所述的发声装置，其特征在于，所述第一中心导磁板设 于所述中心磁体的靠近所述第一振膜的一侧，两所述连接部均包括第一连接段和第二连接段，所述第一连接段连接于所述第一导磁部的边缘，并朝向所述第二振膜延伸，所述第二连接段连接于所述第一连接段远离所述第一导磁部的一侧，并朝所述中心磁体的侧向延伸；
    与两所述连接部对应的边磁体包括上下两个部分，两所述连接部位于所述上下两个部分之间；
    所述环形音圈伸入所述磁间隙的部分位于所述第一连接段背离另一所述中心磁体的一侧。
  5. 如权利要求1所述的发声装置，其特征在于，所述磁间隙包括相对的两个第一间隙和相对的两个第二间隙，两个所述第一间隙和两个所述第二间隙沿所述中心磁体的周向依次交替分布，所述扁平音圈伸入所述第一间隙，所述连接部设于所述第一间隙和所述第二间隙的交接处。
  6. 如权利要求5所述的发声装置，其特征在于，两个所述中心导磁板均包括所述第一导磁部和所述连接部，所述中心磁体设于两个所述第一导磁部之间，每一所述连接部均设于所述第一间隙和所述第二间隙的交接处；
    两个所述中心导磁板的连接部相对设置，且两个所述中心导磁板的连接部呈相互朝向弯折的弯折状，并相互连接。
  7. 如权利要求1所述的发声装置，其特征在于，所述边导磁板包括环形连接部和边导磁部，所述环形连接部与所述壳体连接，所述边导磁部连接于所述环形连接部的内侧，所述边磁体朝向所述第一振膜和所述第二振膜的表面均设有所述边导磁部。
  8. 如权利要求1至7任意一项所述的发声装置，其特征在于，所述第二振动系统还包括连接支架，所述连接支架连接所述第二振膜和所述扁平音圈。
  9. 如权利要求8所述的发声装置，其特征在于，所述连接支架包括第一固定部和分设于所述第一固定部两端的两个第二固定部，所述第一固定部连 接所述第二振膜，所述第二固定部朝远离所述第二振膜的方向延伸；
    所述第二振动系统包括两个所述连接支架和两个所述扁平音圈；
    其中一个所述扁平音圈的一端连接一个所述连接支架的一个第二固定部，所述扁平音圈的另一端连接另一个所述连接支架的一个第二固定部；
    另一个所述扁平音圈的两端分别连接两个所述连接支架的另一个第二固定部。
  10. 如权利要求1至7任意一项所述的发声装置，其特征在于，所述第一振动系统还包括第一定心支片，所述第一定心支片弹性连接所述环形音圈和所述壳体；和/或，所述第二振动系统还包括第二定心支片，所述第二定心支片弹性连接所述扁平音圈和所述壳体。
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