WO2022206047A1 - Dispositif électronique - Google Patents

Dispositif électronique Download PDF

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Publication number
WO2022206047A1
WO2022206047A1 PCT/CN2021/139469 CN2021139469W WO2022206047A1 WO 2022206047 A1 WO2022206047 A1 WO 2022206047A1 CN 2021139469 W CN2021139469 W CN 2021139469W WO 2022206047 A1 WO2022206047 A1 WO 2022206047A1
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WO
WIPO (PCT)
Prior art keywords
sound
magnetic
vibration
electronic device
central
Prior art date
Application number
PCT/CN2021/139469
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English (en)
Chinese (zh)
Inventor
蔡晓东
刘松
Original Assignee
歌尔股份有限公司
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Publication of WO2022206047A1 publication Critical patent/WO2022206047A1/fr

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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 equipment, in particular to an electronic equipment.
  • a sound-emitting device is generally provided inside the electronic device.
  • an electronic device such as a mobile phone, a tablet computer, a laptop computer, etc.
  • a sound-emitting device is generally provided inside the electronic device.
  • an electronic device such as a mobile phone is currently answering a call, there is usually a problem of sound leakage, which is very unfavorable for the protection of personal privacy.
  • the main purpose of the present invention is to propose an electronic device aimed at reducing the risk of sound leakage from the electronic device.
  • the electronic equipment proposed by the present invention includes:
  • a sound-generating device includes a fixed shell, a magnetic circuit system and two vibration systems, the magnetic circuit system is arranged in the fixed shell, and each of the vibration systems includes a vibrating membrane and a voice coil connected to the vibrating membrane, The two vibrating membranes are respectively arranged on two opposite sides of the magnetic circuit system and are connected with the fixed shell, and the voice coils of the two vibrating systems both extend at least partially into the magnetic gap of the magnetic circuit system; and ,
  • the casing is provided with an installation cavity and two sound-out parts, the sound-emitting device divides the installation cavity into two sound-out cavities, and one of the sound-out parts and one of the diaphragms communicate with one of the sound-out cavities , and the other said sound outlet and another said diaphragm communicate with another said sound outlet cavity;
  • the electronic device has an external mode and an earphone mode.
  • the two vibration systems radiate sound waves of the same phase through the corresponding sound output parts.
  • the two The vibration system radiates sound waves of opposite phases outward through the respective corresponding sound outlets.
  • the housing has a front side, a back side and a top side, the front side is provided with a display portion, the back side is opposite to the front side, and the top side is located between the back side and the front side;
  • One of the sound-emitting parts is provided on the front surface or at the connection between the front surface and the top side surface, and the other sound-emitting part is provided on the back surface, the top side surface, or the back surface and the top surface. connection on the top side.
  • the two diaphragms are spaced apart in the arrangement directions of the front and the back.
  • the sound outlet portion includes a plurality of first sound outlet holes, and the plurality of first sound outlet holes are all communicated with the sound outlet cavity.
  • the housing is provided with a first limit step and a second limit step in the installation cavity, and the periphery of the sounding device is clamped by the first limit step and the second limit step. between the limit steps.
  • the sounding device further includes at least one cover plate, the cover plate is covered on the side of one of the diaphragms facing away from the other diaphragm, between the cover plate and the diaphragm A vibration cavity is formed, and the cover plate is provided with a second sound outlet hole that communicates with the vibration cavity and the sound outlet cavity.
  • the cover plate includes a bulge portion raised in a direction away from the vibrating membrane and an annular connecting portion arranged around the periphery of the bulging portion, the annular connecting portion is connected to the fixed shell, and the first Two sound holes are arranged on the raised portion.
  • a sound outlet groove is provided on the side of the raised portion away from the diaphragm, and the sound outlet groove is arranged through two ends to communicate with the sound outlet cavity, and the sound outlet groove is provided with a sound outlet groove. There is the second sound outlet.
  • the magnetic circuit system includes a central magnetic circuit structure and a side magnetic circuit structure
  • the central magnetic circuit structure includes a central magnet and two central magnetic conducting plates respectively disposed 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, the central magnet is arranged between the two first magnetic conductive portions, and at least one of the central magnetic conductive plates includes a first magnetic conductive portion.
  • a first connecting part extending from the edge of the magnetic conducting part to the outside, the first connecting part is connected with the fixing shell;
  • the side magnetic circuit structure is fixed on the fixed shell, and the side magnetic circuit structure includes a side magnet arranged around the central magnet and two side magnetic conductive plates arranged on the upper and lower sides of the side magnet.
  • the magnets and the first connecting parts are distributed at intervals in the circumferential direction of the central magnet, and a magnetic gap is formed between the central magnet and the central magnetic conducting plate and the side magnets and the side magnetic conducting plates;
  • Each vibration system includes two flat voice coils, the central axes of the two flat voice coils are perpendicular to the vibration directions of the two vibration systems, wherein the two flat voice coils of one of the vibration systems are arranged along a first horizontal square and protrude into the two opposite parts of the magnetic gap, and two flat voice coils of the other vibration system are arranged along a second horizontal direction perpendicular to the first horizontal direction, and protrude into the magnetic gap. in two opposite parts.
  • the voice coils of the two vibration systems are annular voice coils, and the central axes of the two annular voice coils are parallel to the vibration directions of the two vibration systems;
  • the magnetic circuit system forms two magnetic gaps with openings facing the two diaphragms, respectively, and the two annular voice coils respectively extend into the two magnetic gaps.
  • the magnetic circuit system includes a support plate, a first magnetic component provided on a first side of the support plate, and a second magnetic component provided on a second side of the support plate, the first magnetic component
  • the assembly forms a first magnetic gap
  • the second magnetic assembly forms a second magnetic gap
  • the two annular voice coils respectively extend into the first magnetic gap and the second magnetic gap.
  • the technical solution of the present invention is to divide the installation cavity in the housing into two sound-emitting cavities by dividing the sound-emitting device, and a sound-emitting portion is provided on the housing corresponding to each sound-emitting cavity, and the sound-emitting device is provided with two vibration systems, so that the two Each vibration system corresponds to the two sound cavities one-to-one, so that the sound can be emitted through the two sound output parts.
  • the electronic device can be set to the earpiece mode, that is, one of the sound-out parts can be close to the ear, and by controlling the two vibration systems, the sound-out part close to the ear can radiate outward.
  • the sound wave is opposite to the sound wave radiated to the outside world by the other sound outlet.
  • an acoustic dipole effect can be formed, so that the sounds emitted by the two sound output parts cancel each other at the peripheral position of the user of the electronic device, thereby reducing the risk of sound leakage when the user uses the electronic device to talk, and realize the electronic device communication.
  • privacy protection feature since the two vibration systems can work independently, parameters such as signals and voltages of the two vibration systems can be adjusted at will to achieve the best call and privacy protection effects.
  • the electronic equipment can also be set to the external mode, that is, the two vibration systems can be controlled to radiate the same phase sound waves through the two sound-emitting parts, which can make up for the lack of volume caused by the size of the sound-emitting device, and can effectively increase the volume. Therefore, the sound outlet can be used as a loudspeaker to emit sound.
  • FIG. 1 is a schematic structural diagram of an embodiment of an electronic device of the present invention
  • FIG. 2 is a schematic structural diagram of the electronic device in FIG. 1 viewed from another angle;
  • Fig. 3 is the cutaway schematic diagram of electronic equipment in the sounding device in Fig. 1;
  • FIG. 4 is a schematic structural diagram of another embodiment of the electronic device of the present invention.
  • Fig. 5 is the cutaway schematic diagram of electronic equipment in the sounding device in Fig. 4;
  • FIG. 6 is a schematic cross-sectional view of the sound-emitting device in another embodiment of the electronic device of the present invention.
  • Fig. 7 is the enlarged view of A place in Fig. 6;
  • Fig. 8 is the structural representation of the sounding device in Fig. 6;
  • FIG. 9 is an exploded view of a sound-emitting device in yet another embodiment of the electronic device of the present invention.
  • Fig. 10 is an exploded view of the magnetic circuit system in Fig. 9;
  • FIG. 11 is a schematic cross-sectional view of the sounding device in FIG. 9 after being assembled.
  • the present invention provides an electronic device, which can be a mobile phone, a tablet computer, a computer, a smart watch, or the like.
  • the electronic device includes a casing 10 and a sounding device 20 .
  • the sounding device 20 includes a fixed shell 21 , a magnetic circuit system 22 and two vibration systems 23 .
  • the magnetic circuit system 22 is arranged in the fixed shell 21, and each vibration system 23 includes a vibration membrane 233 and a voice coil 231 connected to the vibration membrane 233.
  • the voice coils 231 of the two vibration systems 23 both at least partially extend into the magnetic gap 220 of the magnetic circuit system 22 .
  • the housing 10 is provided with a mounting cavity 11 and two sound-emitting parts 12.
  • the sound-generating device 20 divides the mounting cavity 11 into two sound-emitting cavities 111.
  • One of the sound-emitting parts 12 and one diaphragm 233 is connected to one of the sound-emitting chambers 111, and the other is connected to the sound-emitting cavity 111.
  • One sound outlet 12 and the other diaphragm 233 communicate with the other sound outlet cavity 111 .
  • one of the diaphragms 233 is connected to one of the sound output cavities 111
  • the other diaphragm 233 is connected to the other sound output cavity 111 , which means that the space on the side of the two diaphragms 233 away from each other is connected to the two sound output cavities respectively.
  • 111 are connected in a one-to-one correspondence, so that when the diaphragm 233 vibrates and emits sound, the sound can be transmitted from the sound outlet cavity 111 and the sound outlet portion 12 to the outside of the housing 10 .
  • the two sound-emitting parts 12 are arranged at intervals on the housing 10, the sound-emitting directions of the two sound-emitting parts 12 are at an angle or opposite, and the two sound-emitting parts 12 may be located on different sides of the electronic device or other positions, such as electronic devices.
  • the two sound output parts 12 can be arranged on the peripheral side of the electronic device.
  • the two vibration systems 23 can work independently, and the voice coils 231 of the two vibration systems 23 do not interfere with each other when they vibrate simultaneously.
  • the magnetic circuit system 22 is formed with two magnetic gaps, and the voice coils 231 of the two vibration systems 23 each protrude into a magnetic gap and so on.
  • the electronic device has an external mode and an earphone mode.
  • the two vibration systems 23 radiate sound waves of the same phase through the corresponding sound output parts 12.
  • the two vibration systems 23 pass through their corresponding output.
  • the sound portion 12 radiates sound waves of opposite phases outward. That is, in the external mode, by controlling the two vibrating membranes 233 to vibrate in opposite directions at the same time, the two vibration systems 23 radiate positive phase sound waves outward through their corresponding sound outlets 12 at the same time, which can effectively increase the volume, thereby increasing the volume.
  • the sound generating device 20 can be used as a speaker to emit sound.
  • the two diaphragms 233 In the earpiece mode, by controlling the two diaphragms 233 to vibrate in the same direction at the same time, when one of the vibration systems 23 radiates the normal phase sound wave/reverse phase sound wave through the corresponding sound outlet 12, the other vibration system 23 The opposite-phase sound waves/normal-phase sound waves are radiated outward through the corresponding sound output parts 12 .
  • one of the sound-emitting parts 12 is placed close to the user's ear, and the other sound-emitting part 12 is farther away from the user's ear than the aforesaid sound-emitting part 12 .
  • An acoustic dipole effect is formed.
  • the distance between the two sound outlets 12 can be ignored, the distance between the two sound outlets 12 and the ears of the surrounding people is close, and the sound waves of opposite phases of the two vibration systems 23 arrive The ears of surrounding people cancel each other out to reduce sound leakage.
  • the distance between the two sound outlets 12 and the user's ear is relatively large, which does not satisfy the conditions of the acoustic dipole effect, and the degree of sound wave cancellation is small, so the user can hear the sound with appropriate loudness .
  • the technical solution of the present invention divides the installation cavity 11 in the housing 10 into two sound-emitting cavities 111 by dividing the sound-emitting device 20 into two sound-emitting cavities 111 , and a sound-emitting portion 12 is provided on the housing 10 corresponding to each sound-emitting cavity 111 , and the sound-emitting device is 20.
  • Two vibration systems 23 are provided, so that the two vibration systems 23 correspond to the two sound-exit cavities 111 one-to-one, so that the two sound-exit parts 12 can emit sound.
  • the electronic device when the user uses the electronic device to make a call, the electronic device can be set to the earpiece mode, that is, one of the sound output parts 12 can be brought close to the ear, and by controlling the two vibration systems 23, the sound output part 12 close to the ear can be made to move toward the ear.
  • the sound wave radiated to the outside is opposite to the sound wave radiated to the outside by the other sound outlet 12 . Therefore, an acoustic dipole effect can be formed, so that the sounds emitted by the two sound output parts 12 cancel each other at the peripheral positions of the user of the electronic device, thereby reducing the risk of sound leakage when the user uses the electronic device to talk, and realizes the electronic device. Privacy protection during calls.
  • the two vibration systems 23 can work independently, parameters such as signals and voltages of the two vibration systems 23 can be adjusted at will, so as to achieve the best effect of communication and privacy protection.
  • the electronic equipment can also be set in the external mode, that is, the two vibration systems 23 can be controlled to radiate the same phase sound waves through the two sound-emitting parts 12, which can make up for the lack of volume caused by the size of the sound-emitting device 20, and can effectively increase The volume is large, so that the sound output part 12 can be used as a loudspeaker to emit sound.
  • the electronic device is a mobile phone as an example for description, but it is not limited to this.
  • the housing 10 has a front side 13 , a back side 14 and a top side 15 , the front side 13 is provided with a display portion, the back side 14 is opposite to the front side 13 , and the top side 15 is located between the back side 14 and the front side 13 .
  • one of the sound-emitting parts 12 is arranged at the connection between the front surface 13 and the top side surface 15, and the other sound-emitting part 12 is arranged on the back surface 14 and the connection.
  • one of the sound-emitting parts 12 is provided on the front surface 13 , and the other sound-emitting part 12 is provided at the connection between the back surface 14 and the top side surface 15 .
  • This can also ensure that the sound output part 12 has a good coupling effect with the ear when the user is talking, so that the user can clearly answer the sound from the sound output part 12, improve the user's call answering effect, and can achieve a better acoustic dipole effect. and better speaker output.
  • one of the sound-emitting parts 12 is provided at the connection between the front surface 13 and the top side surface 15 , and the other sound-emitting part 12 is provided on the back surface 14 .
  • the other sound output part 12 is provided on the back surface 14 .
  • the sound outlet 12 provided on the back surface 14 can be kept away from the sound outlet 12 provided at the connection between the front surface 13 and the top side 15 , so as to achieve a better acoustic dipole effect and further reduce the risk of sound leakage.
  • one of the sound-emitting parts 12 is provided on the front surface 13
  • the other sound-emitting part 12 is provided on the back surface 14 . This can also ensure that the sound output part 12 has a good coupling effect with the ear when the user is talking, so that the user can clearly answer the sound from the sound output part 12, improve the user's call answering effect, and can achieve a better acoustic dipole effect. .
  • one of the sound outlets 12 is provided at the connection between the front surface 13 and the top side 15 , and the other sound outlet 12 is provided on the top side 15 .
  • the sound output part 12 has a good coupling effect with the ear when the user is talking, so that the user can clearly answer the sound from the sound output part 12, improve the user's call answering effect, and reduce the sound output part 12 on the front. 13 footprint.
  • the two sound output parts 12 are used as speakers to emit sound, the cooperation effect of the two sound output parts 12 can be improved, thereby increasing the volume of the output sound.
  • one of the sound-emitting parts 12 is provided on the front surface 13
  • the other sound-emitting part 12 is provided on the top side surface 15 . This can also ensure that the sound output part 12 has a good coupling effect with the ear when the user is talking, so that the user can clearly answer the sound from the sound output part 12, improve the user's call answering effect, and can achieve a better acoustic dipole effect. .
  • the two diaphragms 233 are spaced apart in the arrangement direction of the front surface 13 and the rear surface 14 . That is to say, the two diaphragms 233 are arranged in parallel between the front 13 and the back 14, so that the size of the diaphragm 233 can be ensured to be larger, the sound emission effect can be improved, and the space occupied by the sound emission device 20 in the thickness direction of the casing 10 can be reduced. It is beneficial to reduce the thickness of electronic equipment.
  • the two diaphragms 233 may also be spaced apart in a direction perpendicular to the arrangement direction of the front surface 13 and the rear surface 14 .
  • the sound outlet portion 12 includes a plurality of first sound outlet holes, and the plurality of first sound outlet holes are all communicated with the sound outlet cavity 111 .
  • the plurality of first sound holes are distributed at intervals along the same direction, for example, the plurality of first sound holes are distributed at intervals along the length direction of the top side surface 15 .
  • the arrangement of the plurality of first sound holes in this way can not only ensure the sound output area, but also reduce the size of the first sound hole and reduce the first sound hole. The possibility of foreign matter such as dust entering the sound hole.
  • the sound outlet 12 may also be an elongated hole.
  • the housing 10 is provided with a first limiting step 16 and a second limiting step 17 in the installation cavity 11 , and the periphery of the sounding device 20 is clamped by the first limiting step 16 and the second limiting step between 17. That is, the peripheral edge of the side of the sounding device 20 away from the first limiting step 16 is in contact with the second limiting step 17 , and the peripheral edge of the side of the sounding device 20 away from the second limiting step 17 is in contact with the first limiting step 17 . Step 16. In this way, the movement of the sounding device 20 can be better restricted, and the stability of the sounding device 20 can be improved.
  • the peripheral surface of the sounding device 20 may also be connected to the casing 10 .
  • the sound generating device 20 further includes at least one cover plate 24 , the cover plate 24 is covered on the side of one of the diaphragms 233 away from the other diaphragm 233 , and the cover plate 24 is connected to the side of the other diaphragm 233 .
  • a vibration cavity is formed between the vibrating membranes 233 , and the cover plate 24 is provided with a second sound outlet hole 241 that communicates the vibration cavity and the sound outlet cavity 111 .
  • a cover plate 24 is provided on the side of any diaphragm 233 away from the other diaphragm 233.
  • the cover plate 24 may be provided only on one side of one of the diaphragms 233, or the cover plate 24 may not be provided.
  • the cover plate 24 includes a protruding portion 243 that protrudes in a direction away from the diaphragm 233 and an annular connecting portion 242 arranged around the periphery of the protruding portion 243.
  • the annular connecting portion 242 is connected to the fixed shell 21, and the second sound outlet hole 241 is provided on the raised portion 243 .
  • the middle of the inner surface of the cover plate 24 (the surface facing the diaphragm 233 ) is concave in the direction away from the diaphragm 233
  • the outer surface of the cover plate 24 (the surface away from the diaphragm 233 ) is correspondingly raised to form a raised portion 243
  • the inner surface of the cover plate 24 can be made to avoid the vibrating film 233 , so as to provide a larger vibration space for the vibration of the diaphragm 233 , and prevent the vibration film 233 from interfering with the cover plate 24 when vibrating.
  • the raised portion 243 can be in contact with the cavity wall of the sound-emitting cavity 111 to increase the stability of the sound-emitting device 20 .
  • the raised portion 243 may also be spaced apart from the cavity wall of the sound-emitting cavity 111 .
  • the first limiting step 16 (the second limiting step 17 ) abuts against the corresponding annular connecting portion 242 of the cover plate 24 , that is, the first limiting step 16 (the second limiting step 17 ) abuts The annular connecting portion 242 faces away from the surface of the other cover plate 24 .
  • a sound output groove 244 is provided on the side of the raised portion 243 away from the diaphragm 233, and the sound output groove 244 is arranged through two ends.
  • the sound outlet groove 244 is provided with a second sound outlet hole 241 . That is, both ends of the sound outlet groove 244 penetrate through the peripheral surface of the raised portion 243 so that the two ends of the sound outlet groove 244 communicate with the sound outlet cavity 111 .
  • the bottom of the sound outlet groove 244 is provided with a second sound outlet hole 241 .
  • This arrangement can ensure that the distance between the groove bottom of the sound-emitting groove 244 and the cavity wall of the sound-emitting cavity 111 is relatively large, and even when the raised portion 243 is in contact with the cavity wall of the sound-emitting cavity 111 , the sound-emitting groove 244 can be avoided.
  • the second sound outlet hole 241 inside is blocked, so as to ensure the normal transmission of sound.
  • the outer peripheral surface of the raised portion 243 is also provided with a second sound outlet hole 241 to increase the sound transmission area between the vibration cavity and the sound outlet cavity 111, even if the raised portion 243 faces away from the surface of the other cover plate 24 and the outlet.
  • the second sound outlet hole 241 on the outer peripheral surface of the raised portion 243 can also be prevented from being blocked, thereby ensuring the positive transmission of sound.
  • the sound output effect of the sound generating device 20 is guaranteed.
  • the outer peripheral surface of the raised portion 243 is provided with an inclined surface, so that more second sound holes 241 can be provided on the outer peripheral surface of the raised portion 243 .
  • the magnetic circuit system 22 has various structures.
  • the magnetic circuit system 22 includes a central magnetic circuit structure and a side magnetic circuit structure, and the central magnetic circuit structure includes a central magnet 223 ,
  • the two central magnetic conductive plates 221 are respectively disposed on the upper and lower sides of the central magnet 223.
  • Each central magnetic conductive plate 221 includes a first magnetic conductive portion 226 corresponding to the central magnet 223.
  • the central magnet 223 is disposed on the two first magnetic conductive plates.
  • at least one central magnetic conductive plate 221 includes a first connection part 227 extending from the edge of the first magnetic conductive part 226 to the outside, and the first connection part 227 is connected to the fixed shell 21;
  • the magnetic circuit system 22 includes a central magnetic circuit structure and a side magnetic circuit structure.
  • the central magnetic circuit structure includes a central magnet 223 and two central magnetic conducting plates 221 respectively disposed on the upper and lower sides of the central magnet 223.
  • Each central magnetic conducting plate 221 includes The first magnetic conductive portion 226 corresponding to the central magnet 223, at least one central magnetic conductive plate 221 includes a first connecting portion 227 extending from the corner of the first magnetic conductive portion 226, and the central magnet 223 is provided on the two first magnetic conductive portions. Between the magnetic parts 226 , the first connecting part 227 protrudes toward the side of the central magnet 223 and is connected to the fixed shell 21 .
  • the side magnetic circuit structure is fixed on the fixed shell 21 , and the side magnetic circuit structure includes a side magnet 224 arranged around the central magnet 223 and two side magnetic conducting plates 222 arranged on the upper and lower sides of the side magnet 224 .
  • the side magnet 224 is connected to the first connecting portion. 227 are distributed at intervals in the circumferential direction of the central magnet 223, and a magnetic gap 220 is formed between the central magnet 223 and the central magnetic conductive plate 221 and the side magnets 224 and the side magnetic conductive plate 222; wherein, the side magnetic conductive plate 222 and the central magnetic conductive plate 221
  • the first connecting part 227 of the fuselage can be connected as a whole, and can also be set as a separate body.
  • Each vibration system 23 includes two flat voice coils 231 , the central axes of the two flat voice coils 231 are perpendicular to the vibration directions of the two vibration systems 23 , wherein the two flat voice coils 231 of one vibration system 23 are along the first horizontal square
  • the two flat voice coils 231 of the other vibration system 23 are arranged along the second horizontal direction perpendicular to the first horizontal direction and extend into the opposite parts of the magnetic gap 220. in two parts.
  • the up-down direction is the vibration direction of the two vibration systems 23
  • the up-down direction is perpendicular to the first horizontal direction and the second horizontal direction.
  • the central magnet 223 By arranging the central magnet 223 on the first magnetic conducting portion 226 of the central magnetic conducting plate 221 , and extending the first connecting portion 227 of the central magnetic conducting plate 221 toward the outside of the central magnet 223 to connect with the fixed shell 21 , the first connecting portion 227 of the central magnet conducting plate 221 is A connecting portion 227 and the side magnets 224 of the magnetic circuit system 22 are distributed at intervals in the circumferential direction of the central magnet 223 .
  • the central magnet 223 can be fixed by connecting the first connecting portion 227 and the fixed shell 21, and the first connecting portion 227 can also be prevented from occupying the gap between the central magnetic circuit structure and the side magnetic circuit structure, so as to ensure the flatness.
  • the width of the magnetic gap 220 between the central magnetic circuit structure and the side magnetic circuit structure can be made smaller, so that the placement space of the inner side magnets 224 and the central magnets 223 of the fixed shell 21 can be increased, so as to reduce the width of the magnetic gap 220.
  • the volume of the side magnet 224 or the center magnet 223 can be increased, the magnetic performance of the sounding device 20 can be improved, the effective magnetic field strength that can be obtained by the flat voice coils 231 of the two vibration systems 22 is larger, the sound loudness of the sounding device 20 can be enhanced, and the Acoustic performance of the sound generating device 20 .
  • the flat voice coil 231 and the first connecting portion 227 are distributed at intervals in the circumferential direction of the central magnet 223 .
  • the flat voice coil 231 has two wire segments spaced along the arrangement direction (vibration direction) of the two diaphragms 233 , and the two wire segments of the flat voice coil 231 are both located in the magnetic gap 220 , that is, the flat voice coil 231 has two wire segments.
  • One wire segment of the coil 231 is at least partially located in the magnetic gap 220 formed by the center magnetic conductive plate 221 and the side magnetic conductive plate 222 on one side of the central magnet 223
  • the other wire segment of the flat voice coil 231 is at least partially located in the central magnet 223 In the magnetic gap 220 formed by the center magnetic conductive plate 221 and the side magnetic conductive plate 222 on the other side.
  • the connecting portion 227 and the flat voice coil 231 share a space in the depth direction of the magnetic gap 220
  • the space in the depth direction of the magnetic gap 220 can also be fully utilized, thereby improving the space utilization rate. Therefore, the vibration space of the flat voice coil 231 in the magnetic gap 220 can be increased, and the vibration effect of the vibration system 23 can be improved.
  • it can ensure that both wire segments of the flat voice coil 231 can be in an effective magnetic field, ensure that the effective magnetic field strengths of the voice coils of the two vibration systems 23 are relatively large, and enhance the sound loudness of the sound generating device.
  • the wire segment of the flat voice coil 231 of the vibration system 23 away from its vibrating membrane 233 can also be extended into the magnetic gap 220, and the wire segment of the flat voice coil 231 of the vibration system 23 close to its vibrating membrane 233 is located in the magnetic gap 220. outside the magnetic gap 220 .
  • the two central magnetic conductive plates 221 both include a first magnetic conductive portion 226 and a first connection portion 227 , the first connection portions 227 of the two central magnetic conductive plates 221 are disposed opposite to each other, and the two central magnetic conductive plates The first connecting portions 227 of the 221 are bent toward each other, and are connected to each other.
  • each central magnetic conductive plate 221 includes a first magnetic conductive portion 226 and a first connection portion 227 , the central magnet 223 is disposed between the two first magnetic conductive portions 226 , and each of the first connection portions 227 is disposed in the phase Between the adjacent two side magnets 224 , the first connecting portion 227 of each central magnetic conducting plate 221 is bent in the direction of the other central magnetic conducting plate 221 , so as to be connected with the first connection of the other central magnetic conducting plate 221 .
  • the parts 227 are connected, so that the stability of the central magnet 223 between the two central magnetic conducting plates 221 can be increased.
  • the first connecting portion 227 may also be straight, that is, the first connecting portion 227 is not bent, or the first connecting portion 227 of the two central magnetic conducting plates 221 is connected through a connecting structure.
  • a connecting piece is provided on the first connecting portion 227 of the two central magnetic conducting plates 221 .
  • the central magnetic conducting plate 221 at least includes two first connecting portions 227 respectively disposed on two opposite sides of the first magnetic conducting portion 226 . That is, the central magnetic conductive plate 221 can be connected to the fixed shell 21 through the first connecting portions 227 on the opposite sides of the first magnetic conductive portion 226, which not only increases the connection area between the central magnetic conductive plate 221 and the fixed shell 21, but also makes the first The two opposite sides of the magnetic conductive portion 226 are uniformly stressed, so that the stability of the central magnetic conductive plate 221 can be improved, and the magnetic circuit system 22 can be kept stable during the vibration process.
  • the number of the first connecting parts 227 may also be three, four or more, and so on. Of course, in other embodiments, the first connecting portion 227 may only be on one side of the first magnetic conducting portion 226 .
  • the side magnetic conducting plate 222 includes a second connecting portion 251 and a side magnetic conducting portion 252 , the second connecting portion 251 is annular and is connected to the fixed shell 21 , and the side magnetic conducting portion 252 is connected to the second connecting portion 251 .
  • the side magnets 224 are provided with side magnetic conductive portions 252 on the surfaces of the side magnets 224 facing the two diaphragms 233 .
  • the magnetic circuit system 22 includes two side magnetic conductive plates 222 , one of which is disposed on the side of the side magnet 224 facing one of the diaphragms 233 , and the other side magnetic conductive plate 222 is disposed on the side magnet 224 faces the side of the other diaphragm 233 , and each side magnetic conducting plate 222 includes a second connecting portion 251 and a side magnetic conducting portion 252 .
  • a plurality of side magnetic conductive parts 252 can be provided inside the second connection part 251 , and the number of the side magnetic conductive parts 252 can be set according to the number of the side magnets 224 .
  • the second connecting portion 251 and the side magnetic conducting portion 252 are integrally formed. Compared with the way of arranging a plurality of independent side magnetic conducting plates 222, the side magnetic conducting portion 252 and the second connecting portion 251 can be connected as a whole, which can reduce the The number of parts and components of the sounding device is beneficial to reduce the assembly process and improve the production efficiency.
  • the connection stability of the side magnetic conducting plate 222 can be improved.
  • the side magnetic conducting portion 252 may also be annular, so as to be disposed on the surfaces of the plurality of side magnets 224 facing the vibrating film 233 .
  • the first connecting portion 227 is connected to the second connecting portion 251 , and the center magnetic conductive plate and the side magnetic conductive plate are integrally formed. In this way, the center magnetic conductive plate 221 and the side magnetic conductive plate 222 can be easily manufactured and formed, and the connection process of the central magnetic conductive plate 221 and the side magnetic conductive plate 222 can be reduced.
  • the first connection portion 227 and the second connection portion 251 may also be welded together.
  • the center magnetic conductive plate 221 and the side magnetic conductive plate 222 may also be provided as separate bodies.
  • the voice coils of the two vibration systems 23 are annular voice coils 231 , and the central axes of the two annular voice coils 231 are parallel to the vibration directions of the two vibration systems 23 .
  • the magnetic circuit system 22 forms two magnetic gaps with openings facing the two diaphragms 233 respectively, and the two annular voice coils 231 respectively protrude into the two magnetic gaps 220 .
  • the voice coils of the two vibration systems 23 are both annular voice coils 231
  • the annular end face of one end of the annular voice coil 231 can be connected to the diaphragm 233, which can ensure the reliability of the connection between the annular voice coil 231 and the diaphragm 233. It is beneficial to simplify the structure of the vibration system.
  • the magnetic circuit system 22 includes a support plate 225, a first magnetic component 228 disposed on a first side of the support plate 225, and a second magnetic component 229 disposed on a second side of the support plate 225.
  • the first magnetic component 228 forms a first magnetic gap
  • the second magnetic assembly 229 forms a second magnetic gap
  • the two annular voice coils 231 respectively extend into the first magnetic gap and the second magnetic gap.
  • the first side of the support plate 225 faces one of the diaphragms 233
  • the second side of the support plate 225 faces the other diaphragm 233 .
  • the first magnetic component 228 is located between the support plate 225 and one of the diaphragms 233
  • the second magnetic component 229 is located between the support plate 225 and the other diaphragm 233 .
  • the support plate 225 can be a simple flat plate structure, which is beneficial to simplify the structure of the sound generating device 20 .
  • two supporting plates 225 may also be provided, and the magnet assembly may be provided between the two supporting plates 225, and so on.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

La présente invention concerne un dispositif électronique, comprenant un boîtier et un appareil de génération de son. L'appareil de génération de son comprend un boîtier fixe, un système de circuit magnétique et deux systèmes de vibration, dans lequel le système de circuit magnétique est disposé à l'intérieur du boîtier fixe ; chaque système de vibration comprend une membrane vibrante et une bobine acoustique, qui est reliée à la membrane vibrante ; les deux membranes vibrantes sont respectivement disposées sur deux côtés opposés du système de circuit magnétique et sont reliées au boîtier fixe ; et les bobines acoustiques des deux systèmes de vibration s'étendent au moins partiellement dans un entrefer magnétique du système de circuit magnétique. Le boîtier est pourvu d'une cavité de montage et de deux parties de sortie vocale ; l'appareil de génération de son divise la cavité de montage en deux cavités de sortie sonore, l'une des parties de sortie vocale et l'une des membranes vibrantes étant en communication avec l'une des cavités de sortie sonore, et l'autre des parties de sortie vocale et l'autre des membranes vibrantes étant en communication avec l'autre des cavités de sortie sonore. Le dispositif électronique comporte un mode haut-parleur et un mode récepteur ; en mode haut-parleur, les deux systèmes de vibration émettent, vers l'extérieur, des ondes sonores ayant des phases identiques ; et en mode récepteur, les deux systèmes de vibration émettent, vers l'extérieur, des ondes sonores ayant des phases opposées. Grâce à la solution technique de la présente invention, le risque de fuite sonore d'un dispositif électronique peut être réduit.
PCT/CN2021/139469 2021-03-31 2021-12-20 Dispositif électronique WO2022206047A1 (fr)

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CN114866632A (zh) * 2022-05-16 2022-08-05 歌尔股份有限公司 电子设备及其发声控制方法
CN114979338A (zh) * 2022-05-16 2022-08-30 歌尔股份有限公司 电子设备及其发声控制方法
CN115103264A (zh) * 2022-06-20 2022-09-23 维沃移动通信有限公司 发声模组和电子设备
CN114945128A (zh) * 2022-06-30 2022-08-26 维沃移动通信有限公司 电子设备
CN117440072A (zh) * 2022-07-12 2024-01-23 荣耀终端有限公司 一种电子设备
CN117440071A (zh) * 2022-07-12 2024-01-23 荣耀终端有限公司 一种电子设备
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