WO2022166375A1 - Dispositif de production de son - Google Patents

Dispositif de production de son Download PDF

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Publication number
WO2022166375A1
WO2022166375A1 PCT/CN2021/136250 CN2021136250W WO2022166375A1 WO 2022166375 A1 WO2022166375 A1 WO 2022166375A1 CN 2021136250 W CN2021136250 W CN 2021136250W WO 2022166375 A1 WO2022166375 A1 WO 2022166375A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
sound
conductive diaphragm
magnetic circuit
diaphragm
Prior art date
Application number
PCT/CN2021/136250
Other languages
English (en)
Chinese (zh)
Inventor
王苗苗
李波波
郭晓冬
Original Assignee
歌尔股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2022166375A1 publication Critical patent/WO2022166375A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—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 utility model relates to the technical field of electro-acoustic conversion, in particular to a sound-generating monomer.
  • Micro-speakers are often required to be installed in existing electronic devices, and most of the existing micro-speakers are energized through the voice coil, so that the voice coil moves in the gap, so that the voice coil drives the diaphragm to vibrate. During the vibrating and sounding process of the diaphragm, the voice coil and the diaphragm move together, resulting in large vibration quality, poor high-frequency sound quality, and low electro-acoustic conversion efficiency.
  • the main purpose of the present invention is to provide a sound-generating unit, which aims to solve at least one technical problem in the existing speaker structure.
  • the sound-generating unit includes a housing with an accommodation space, a magnetic conducting diaphragm and two magnetic circuit systems arranged in the accommodation space, and the two magnetic circuit systems are opposite to each other.
  • the magnetic circuit system includes a magnetic steel attached to the casing and a coil arranged around the magnetic steel, the magnetic steel is a solid structure; the magnetic conductive diaphragm is arranged on two of the The magnetic circuit systems are spaced apart from the two magnetic circuit systems respectively, and the magnetic conductive diaphragm is used to vibrate and emit sound under the action of the alternating electromagnetic field generated by the magnetic circuit systems.
  • the magnetization directions of the magnetic steels of the two magnetic circuit systems are the same, and the current directions of the coils of the two magnetic circuit systems are opposite.
  • the housing includes a first magnetic yoke and a second magnetic yoke that cooperate to form the receiving space, and the magnetic conductive diaphragm is arranged between the first magnetic yoke and the second magnetic yoke,
  • the two magnetic circuit systems are respectively arranged in the space surrounded by the first magnetic yoke and the magnetically conductive diaphragm and in the space surrounded by the second magnetic yoke and the magnetically conductive diaphragm.
  • the first yoke includes a top wall and a first side wall extending from the top wall
  • the second yoke includes a bottom wall and a second side wall extending from the bottom wall
  • two In the magnetic circuit system the magnetic steel of one of the magnetic circuit systems is arranged on the top wall and forms a first gap with the first side wall, and the magnetic steel of the other magnetic circuit system is arranged on the top wall.
  • a second gap is formed between the bottom wall and the second side wall, and the two coils are respectively arranged in the first gap and the second gap.
  • first side wall and the second side wall respectively fix the magnetic conductive diaphragm from opposite sides of the magnetic conductive diaphragm.
  • the first magnetic yoke and/or the second magnetic yoke are provided with sound outlet holes communicating with the receiving space.
  • an end of the first side wall close to the second side wall is recessed to form the sound outlet hole.
  • the sound outlet holes are opened on the bottom wall and the top wall, and the two sound outlet holes communicate with the first gap and the second gap respectively.
  • the magnetic conductive diaphragm is a planar magnetic conductive diaphragm.
  • the magnetic conductive diaphragm is a metal diaphragm.
  • the magnetic circuit system is arranged on both sides of the magnetic conductive diaphragm, so that the energization of the coil can be controlled, so that the magnetic circuit system can generate an alternating electromagnetic field, and the magnetic conductive diaphragm can vibrate in the space under the action of the alternating electromagnetic field.
  • FIG. 1 is a schematic cross-sectional structure diagram of an embodiment of a sound-emitting monomer of the present invention
  • FIG. 2 is a schematic diagram of the disassembled structure of an embodiment of a sound-emitting monomer of the present invention
  • FIG. 3 is a schematic diagram of the force analysis of the coil of an embodiment of the present invention when the coil is not energized;
  • FIG. 4 is a schematic diagram of the force analysis of the coil of an embodiment of the present invention when the coil is energized.
  • the utility model proposes a sound generating unit 10 .
  • the technical solution of the present invention proposes a sound-generating unit 10 , the sound-generating unit 10 includes a housing 1 having an accommodation space, a magnetic conductive diaphragm 3 and two A magnetic circuit system 5, two of the magnetic circuit systems 5 are arranged at an interval relative to each other, and the magnetic circuit system 5 includes a magnetic steel 51 attached to the housing 1 and a coil 53 arranged around the magnetic steel 51, so The magnetic steel 51 is a solid structure; the magnetic conductive diaphragm 3 is arranged between the two magnetic circuit systems 5 and is separately arranged from the two magnetic circuit systems 5, and the magnetic conductive diaphragm 3 is used for Under the action of the alternating electromagnetic field generated by the magnetic circuit system 5 , it vibrates and emits sound.
  • the voice coil is connected to the diaphragm, and the voice coil is inserted into the magnetic gap. After the voice coil is energized, under the action of the magnetic field, the voice coil reciprocates in the magnetic gap to push the diaphragm to vibrate.
  • the present invention does not provide a voice coil connected to the magnetic conductive diaphragm 3 , and the coil 53 is spaced from the magnetic conductive diaphragm 3 .
  • the magnetic conductive diaphragm 3 moves, and the coil 53 and the magnetic steel 51 in the magnetic circuit system 5 may not move.
  • the magnetic conductive diaphragm 3 is only affected by the magnetic field generated by the magnetic steel 51 located on both sides. At this time, the magnetic size and shape of the two magnetic steels 51 can be controlled. etc., so that the magnetic conductive diaphragm 3 can remain stationary at a preset position in the vibration space.
  • the present invention arranges the coil 53 around the magnetic steel 51, so that in the magnetic field generated by the magnetic circuit system 5, the intensity of the permanent magnetic field in the central area is higher than that in the edge area.
  • the magnetic field strength of the alternating magnetic field experienced by the central region of the magnetic conductive diaphragm 3 is greater than the magnetic field strength of the alternating magnetic field received by the edge region of the magnetic conductive diaphragm 3, so the magnetic conductivity
  • the driving force received by the central area of the diaphragm 3 is greater than the driving force received by the edge area of the magnetic conductive diaphragm 3, so that the magnetic conductive diaphragm 3 is more easily affected by the alternating electromagnetic field to generate sound and vibrate.
  • the magnetic steel 51 , the coil 53 and the balance diaphragm are coaxially arranged to facilitate vibration balance.
  • the energization of the coil 53 can be controlled, so that the magnetic circuit system 5 generates an alternating electromagnetic field, and the magnetic conductive diaphragm 3 is alternating Under the action of the electromagnetic field, it can vibrate in the vibration space, eliminating the need for a voice coil connected to the diaphragm, so that only the magnetic conductive diaphragm 3 vibrates, and the vibration components to be driven by the magnetic circuit system 5 are of small mass, which can improve high-frequency performance, and can Improve the sound-electric conversion efficiency; the present utility model arranges the coil 53 around the magnetic steel 51, so that the driving force generated in the central area of the magnetic conductive diaphragm 3 is larger, which is beneficial to the magnetic conductive diaphragm 3 to generate vibration.
  • the magnetization directions of the magnets 51 of the two magnetic circuit systems 5 are the same, and the current directions of the coils 53 of the two magnetic circuit systems 5 are opposite.
  • FIG. 3 is a force analysis diagram of the magnetic conductive diaphragm 3 in an embodiment when the coil 53 is not energized
  • FIG. 4 is a magnetic conductive vibration in an embodiment when the coil 53 is energized Force analysis diagram of membrane 3.
  • FIG. 3 is a force analysis diagram of the magnetic conductive diaphragm 3 in an embodiment when the coil 53 is not energized
  • FIG. 4 is a magnetic conductive vibration in an embodiment when the coil 53 is energized
  • Force analysis diagram of membrane 3 In the embodiment shown in FIG.
  • the magnetic steel 51 located above the magnetic conductive diaphragm 3 and the magnetic steel 51 located below the magnetic conductive diaphragm 3 are both N-pole at the upper end and S-pole at the lower end, that is, the magnetic steel 51 has a
  • the magnetization direction is the same, the direction of the magnetic field line is from the N pole to the S pole, and the magnetic field line is the direction shown by the arrow in the figure because of the magnetic permeability of the magnetic permeable diaphragm 3 . Since the magnetic conductive diaphragm 3 is subjected to opposite directions of the magnetic forces of the two magnetic steels 51 , the magnetically conductive diaphragm 3 can be suspended between the two magnetic steels 51 in a balanced manner.
  • the magnetic steel 51 located above the magnetic conductive diaphragm 3 and the magnetic steel 51 located below the magnetic conductive diaphragm 3 are both N-pole at the upper end and S-pole at the lower end, and are located at the upper magnetic steel at the same time.
  • the current direction of the coil 53 outside 51 is left in and right out, and the current direction of the coil 53 outside the lower magnetic steel 51 is right in and left out, that is, the current directions of the two coils 53 are opposite. According to Ampere's Law, it is determined that the upper end of the coil 53 above the magnetically conductive diaphragm 3 is S pole and the lower end is N-level.
  • the opposite sides of the magnetic conductive diaphragm 3 are magnetized by the upper magnetic steel 51 and the lower magnetic steel 51 to generate polarity.
  • the upper side of the magnetic conductive diaphragm 3 is the N pole, and the lower side is the S pole; the lower end of the upper coil 53 is the N pole.
  • the upper end of the lower coil 53 is N pole and the lower side of the magnetic conductive diaphragm 3 attracts the opposite sex, so that under the action of the two superimposed forces, the magnetic conductive diaphragm 3 moves toward the upper side of the magnetic conductive diaphragm 3.
  • the lower deformation generates vibration, thereby further improving the electro-acoustic conversion efficiency of the sound-generating unit 10 .
  • the electromagnetic force F ⁇ pushes the magnetic conductive diaphragm 3 to move toward the lower magnetic circuit system 5 .
  • the current direction of the coil 53 above and below the magnetic conductive diaphragm 3 is the opposite direction as shown in FIG.
  • the magnetic conductive diaphragm 3 is subjected to the magnetic flux of the upper magnetic circuit system 5 ⁇ 1 ′>magnetic conductive vibration
  • the electromagnetic force generated by the magnetic circuit system 5 pushes the magnetic conductive diaphragm 3 to move closer to the upper magnetic circuit system 5 , so that the magnetic conductive diaphragm 3 can be controlled to vibrate and emit sound by controlling the current in the coil 53 .
  • the housing 1 includes a first magnetic yoke 11 and a second magnetic yoke 13 that cooperate to form the receiving space, and the magnetic conductive diaphragm 3 is disposed on the first magnetic yoke 11 and the second magnetic yoke 13 .
  • the two magnetic circuit systems 5 are respectively disposed in the space surrounded by the first magnetic yoke 11 and the magnetic conductive diaphragm 3 , and the second magnetic yokes 13 and in the space surrounded by the magnetic conductive diaphragm 3 .
  • the first magnetic yoke 11 and the second magnetic yoke 13 are magnetic conductive parts, the magnetic conductive diaphragm 3 is in direct contact with the magnetic conductive shell 1, and the magnetic circuit is more concentrated and complete, so that the magnetic field of the magnetic circuit system 5 can be concentrated in the shell In the body 1, it is beneficial to improve the electro-acoustic conversion efficiency.
  • the first magnetic yoke 11 includes a top wall 111 and a first side wall 113 extending from the top wall 111
  • the second magnetic yoke 13 includes a bottom wall 131 and a first side wall 113 extending from the bottom wall 131 .
  • the second side wall 133; the magnetic steel 51 of one of the two magnetic circuit systems 5 is disposed on the top wall 111 and forms a first gap with the first side wall 113, Another magnetic steel 51 of the magnetic circuit system 5 is disposed on the bottom wall 131 and forms a second gap with the second side wall 133 , and the two coils 53 are respectively disposed in the first gap and inside the second gap, that is, from outside to inside, the first side wall 113, a coil 53 and a magnetic steel 51 are successively sleeved, and the second side wall 133, another coil 53 and another magnetic steel 51 are sleeved successively Assume.
  • the magnetic steel 51 can be directly attached to the top wall 111 or the bottom wall 113 , while the coil 53 can be wound on the magnetic steel 51 , or can be pre-wound and attached to the top wall 111 or the bottom wall 113 .
  • the components of the magnetic circuit system 5 are set in sequence, thereby effectively reducing the size of the sounding unit 10 .
  • the first side wall 113 and the second side wall 133 respectively fix the magnetic conductive diaphragm 3 from opposite sides of the magnetic conductive diaphragm 3, that is, the edge of the magnetic conductive diaphragm 3 can be It is fixed on the end of the first side wall 113 or the second side wall 133 by gluing, welding, etc., and then the first magnetic yoke 11 and the second magnetic yoke 13 are fixed together with the cover, and no other fixing structure is required. Fewer parts make product assembly easier.
  • the first magnetic yoke 11 and/or the second magnetic yoke 13 are provided with sound outlet holes 12 communicating with the receiving space, so as to facilitate the air flow propelled by the magnetic conductive diaphragm 3 to propagate to the outside.
  • sound outlet holes 12 can open sound outlet holes 12 at different positions of the housing 1 that communicate with the receiving space and the outside as required.
  • the sound outlet 12 is opened on the first side wall 113 and/or the second side wall 133.
  • the end of the first side wall 113 close to the second side wall 133 is recessed to form a The sound hole 12 is described.
  • the sound outlet holes 12 are opened on the bottom wall 131 and the top wall 111 , and the two sound outlet holes 12 are respectively connected to the first gap and the second gap. Connected.
  • the magnetic conductive diaphragm 3 is a planar magnetic conductive diaphragm or a metal diaphragm. Compared with the diaphragm having a folded ring structure in the prior art, the planar magnetic conductive diaphragm 3 provided in the present invention can reduce the size of the sounding unit 10 .
  • the magnetic conductive diaphragm 3 includes a metal body, and the metal body includes one or more of stainless steel S430, silicon steel, SPCC, iron-nickel alloy, iron-cobalt-vanadium alloy, and soft ferrite. Compared with rubber or paper diaphragms, when the metal body vibrates, the sound quality emitted has a metallic texture.
  • the magnetic conductive diaphragm 3 may also include a damping layer disposed on the metal body, and the damping layer may be an adhesive film layer, PEEK, TPU, TPEE, or the like.
  • the damping property of the magnetic conductive diaphragm 3 can be adjusted through the damping layer, which is beneficial to the balance of the vibration of the magnetic conductive diaphragm 3 and brings a more delicate hearing sense.
  • the magnetic conductive diaphragm 3 includes a base material and a magnetic conductive layer disposed on the base material, and the base material is any one of metal or non-metal, elastomer or non-elastomeric body
  • the magnetic conductive layer is a powder with soft magnetic properties such as nickel, iron-nickel alloy, iron-phosphorus alloy, etc., which is disposed on the base material by plating, deposition, magnetron sputtering, and the like.
  • the thickness of the magnetic conductive diaphragm 3 is 10-40um.

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

Abstract

L'invention concerne une unité de production de son. L'unité de production de son comprend un boîtier ayant un espace de logement, et une membrane magnétiquement conductrice et deux systèmes de circuit magnétique disposés dans l'espace de logement ; les deux systèmes de circuit magnétique sont opposés et espacés l'un de l'autre, chaque système de circuit magnétique comprend un acier magnétique fixé sur le boîtier et une bobine disposée autour de l'acier magnétique, et l'acier magnétique est d'une structure solide ; la membrane magnétiquement conductrice est disposée entre les deux systèmes de circuit magnétique et est espacée séparément des deux systèmes de circuit magnétique, et la membrane magnétiquement conductrice est configurée pour vibrer et produire un son sous l'action d'un champ électromagnétique alternatif généré par les systèmes de circuit magnétique. En disposant la bobine autour de l'acier magnétique, une grande force d'entraînement est générée dans une région centrale de la membrane magnétiquement conductrice, ce qui facilite la génération de vibrations par la membrane magnétiquement conductrice.
PCT/CN2021/136250 2021-02-02 2021-12-08 Dispositif de production de son WO2022166375A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202120300918.3 2021-02-02
CN202120300918.3U CN214381368U (zh) 2021-02-02 2021-02-02 发声单体

Publications (1)

Publication Number Publication Date
WO2022166375A1 true WO2022166375A1 (fr) 2022-08-11

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WO (1) WO2022166375A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024087300A1 (fr) * 2022-10-28 2024-05-02 瑞声光电科技(常州)有限公司 Dispositif de production de son multifonctionnel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN214381368U (zh) * 2021-02-02 2021-10-08 歌尔股份有限公司 发声单体

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103152679A (zh) * 2013-03-14 2013-06-12 胡宗科 一种电磁瞬磁式扬声器
US20130190552A1 (en) * 2010-10-08 2013-07-25 3Win N.V. Implantable actuator for hearing applications
CN107484089A (zh) * 2017-07-26 2017-12-15 苏州逸巛声学科技有限公司 一种受话器及其装配工艺
CN209787376U (zh) * 2019-07-09 2019-12-13 深圳市华韵鑫电子有限公司 磁感应耳机喇叭及耳机
CN111800714A (zh) * 2019-07-23 2020-10-20 深圳市豪恩声学股份有限公司 扬声器及电子设备
CN214381368U (zh) * 2021-02-02 2021-10-08 歌尔股份有限公司 发声单体

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130190552A1 (en) * 2010-10-08 2013-07-25 3Win N.V. Implantable actuator for hearing applications
CN103152679A (zh) * 2013-03-14 2013-06-12 胡宗科 一种电磁瞬磁式扬声器
CN107484089A (zh) * 2017-07-26 2017-12-15 苏州逸巛声学科技有限公司 一种受话器及其装配工艺
CN209787376U (zh) * 2019-07-09 2019-12-13 深圳市华韵鑫电子有限公司 磁感应耳机喇叭及耳机
CN111800714A (zh) * 2019-07-23 2020-10-20 深圳市豪恩声学股份有限公司 扬声器及电子设备
CN214381368U (zh) * 2021-02-02 2021-10-08 歌尔股份有限公司 发声单体

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024087300A1 (fr) * 2022-10-28 2024-05-02 瑞声光电科技(常州)有限公司 Dispositif de production de son multifonctionnel

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