WO2020181893A1 - Dispositif de génération de son et produit électronique - Google Patents

Dispositif de génération de son et produit électronique Download PDF

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Publication number
WO2020181893A1
WO2020181893A1 PCT/CN2019/129737 CN2019129737W WO2020181893A1 WO 2020181893 A1 WO2020181893 A1 WO 2020181893A1 CN 2019129737 W CN2019129737 W CN 2019129737W WO 2020181893 A1 WO2020181893 A1 WO 2020181893A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
diaphragm
vibration system
voice coil
sound
Prior art date
Application number
PCT/CN2019/129737
Other languages
English (en)
Chinese (zh)
Inventor
王兴龙
马学敏
葛连山
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 WO2020181893A1 publication Critical patent/WO2020181893A1/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
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the present invention relates to the field of electroacoustic technology, and more specifically, to a sound generating device and an electronic product.
  • the sound generating device is an important acoustic component in portable electronic equipment. It is a device used to realize the conversion of electrical signals and acoustic signals. It is often used in electronic equipment such as mobile phones and computers. With the rapid development of related technologies of electronic products, in order to achieve better performance, those skilled in the art have improved the structure and other characteristics of the sound generating device.
  • the existing sound device installed on the electronic product usually adopts a structure where a single diaphragm produces sound on the front side.
  • the increase in the vibration area will increase the size of the sound-generating device, which makes it difficult to assemble into electronic products with limited space.
  • the increase of the vibrating area will cause the working amplitude of the sound device to increase, which is likely to have an adverse effect on the acoustic performance of the sound device.
  • An object of the present invention is to provide a new technical solution for a double-sided sound emitting device.
  • a sound emitting device which includes a housing and:
  • a first vibration system comprising a first diaphragm and at least two first voice coils spaced apart on the first diaphragm;
  • a second vibration system the second vibration system includes a second diaphragm and at least one second voice coil arranged on the second diaphragm, the second diaphragm being arranged opposite to the first diaphragm;
  • a magnetic circuit system the magnetic circuit system includes a central magnet and a support, and the support is located between the first vibration system and the second vibration system.
  • the magnetic circuit system further includes: a side magnet part, and the first voice coil and the second voice coil are suspended in a magnetic gap formed by the side magnet part and the center magnet.
  • the central magnet includes: two first magnets;
  • the two first voice coils have the same size and are arranged side by side in the magnetic gap formed by the first magnet and the side magnet part.
  • the support includes a frame portion adjacent to the first diaphragm and having a hollow, and a central portion adjacent to the second diaphragm; the central portion is relatively located in the central area of the frame portion and supported by the connecting portion On the frame portion, a gap is formed between the center portion and the frame portion;
  • the central magnet and the first washer are sequentially arranged on the surface of the central part facing the first diaphragm.
  • the edge magnet part includes edge magnets and edge washers which are sequentially arranged on the surface of the frame body part facing the second diaphragm; the first voice coil is suspended by the center magnet and the second diaphragm. The second voice coil is suspended in the magnetic gap surrounded by the center magnet, the center part and the side magnets, and the side washer.
  • the side magnet part includes a side magnet and a side washer
  • the housing includes a first housing and a second housing
  • the support member is injection molded on the first housing
  • the second shell is injection molded on the second shell.
  • the magnetic circuit system further comprises: a second magnet, and the second voice coil is suspended in a magnetic gap formed by the second magnet and the side magnet part.
  • the number and arrangement of the second voice coil and the first voice coil are the same.
  • the support member has a flat plate structure, and the second magnet and the second washer are sequentially arranged on the surface of the support member.
  • it further includes: two sets of centering support pieces, the two sets of centering support pieces are respectively arranged between the first vibration system and the second vibration system, and the centering support pieces are provided with welding Disk, the two sets of the centering support pieces are conducted through metal inserts to access external electrical signals.
  • an electronic product which is characterized by comprising:
  • the main body of an electronic product wherein the sound generating device is arranged in the main body of the electronic product, and the main body of the electronic product has a sound outlet through which the sound generated by the sound generating device is transmitted.
  • the sound device provided by the present invention has two sets of vibration systems arranged in the shell, and at least one of the vibration systems is provided with multiple voice coils, and the two sets of vibration systems share the magnetic circuit system between the two diaphragms, which greatly saves The height space of the sounding device is reduced, and the size of the sounding device housing is reduced.
  • the sounding device can be made lighter and thinner; at the same time, the two vibration systems do not interfere with each other, which makes the amplitude of the two vibration systems effective , The loudness of the sound device is greater and the acoustic performance is better.
  • FIG. 1 is a schematic structural diagram of a sound generating device provided by a specific embodiment of the present invention
  • Figure 2 is a schematic cross-sectional view of Figure 1 along the A-A section;
  • Figure 3 is a schematic cross-sectional view taken along the B-B section of Figure 1;
  • FIG. 4 is a schematic diagram of the structure of the supporting member in the sound generating device according to the specific embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional view of another sound emitting device according to a specific embodiment of the present invention.
  • FIG. 6 is a schematic cross-sectional view of another sound emitting device provided by the specific embodiment of the present invention.
  • Fig. 7 is an exploded view of a sound generating device provided by a specific embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a sound generating device provided by a specific embodiment of the present invention
  • FIG. 2 is a schematic cross-sectional view along the AA section of FIG. 1
  • FIG. 3 is a schematic cross-sectional view along the BB section of FIG. 1
  • FIG. 4 is a specific embodiment of the present invention
  • Figure 5 is a schematic cross-sectional view of another sound generating device provided in the specific embodiment of the present invention
  • Figure 6 is a schematic cross-sectional view of another sound generating device provided in the specific embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An exploded view of the sound generating device provided. Now, taking FIGS. 1 to 7 as an example, the structure and principle of the sound generating device of the present invention will be described in detail.
  • the present invention provides a sound generating device, which includes a housing, a first vibration system, a second vibration system, and a magnetic circuit system.
  • the first vibration system and the second vibration system are respectively located above and below the magnetic circuit system.
  • the two vibration systems share a magnetic circuit system to produce sound.
  • the whole sounding device can be, but is not limited to, a rectangular structure, a racetrack-shaped structure or a circular structure.
  • the rectangular structure is taken as an example for description.
  • a cavity is formed inside the housing.
  • the first vibration system and the second vibration system are respectively suspended on the upper and lower ends of the magnetic circuit system.
  • the first vibration system includes a first diaphragm 11 and at least two first voice coils 12 arranged on the first diaphragm 11 at intervals, and a plurality of the first voice coils 12 are arranged in the housing and located One side of the magnetic circuit system along the vibration direction.
  • the vibration direction in this embodiment refers to the vibration direction of the first vibration system and the second vibration system.
  • the two first voice coils may be arranged side by side on the first diaphragm; or, the two first voice coils are one large voice coil and one small voice coil , The small voice coil and the large voice coil are sheathed together on the first diaphragm.
  • three identical first voice coils are arranged side by side on the first diaphragm, and this embodiment does not specifically limit the number and location of the first voice coils.
  • the second vibration system includes a second diaphragm 21 and at least one second voice coil 22 arranged on the second diaphragm, and the second diaphragm 21 is opposite to the first diaphragm 11.
  • Set located on the other side of the magnetic circuit system along the vibration direction.
  • the number of the second voice coil 22 can be one, two or more.
  • Those skilled in the art can arrange at least one second voice coil 22 on the second diaphragm 21 according to requirements, so that the first The vibration system and the second vibration system simultaneously vibrate and sound in the same or opposite directions.
  • the magnetic circuit system includes a central magnet and a support 32, and the support 32 is located between the first vibration system and the second vibration system.
  • the supporting member 32 can be arranged in different shapes as required, so that the first vibration system and the second vibration system share the magnetic circuit system.
  • the first voice coil 12 and the second voice coil 22 are respectively suspended in the magnetic gap of the magnetic circuit system to drive the first diaphragm 11 and the second diaphragm 21 Vibration sounds.
  • the magnetic circuit system may be a single magnetic circuit system, a three magnetic circuit system, a five magnetic circuit system or a ring magnetic circuit system, which is not limited in this embodiment.
  • the sound device provided by the present invention has two sets of vibration systems arranged in the shell, and at least one of the vibration systems is provided with multiple voice coils, and the two sets of vibration systems share the magnetic circuit system between the two diaphragms, which greatly saves The height space of the sounding device is reduced, and the size of the sounding device housing is reduced.
  • the sounding device can be made lighter and thinner; at the same time, the two vibration systems do not interfere with each other, which makes the amplitude of the two vibration systems effective , The loudness of the sound device is greater.
  • the magnetic circuit system further includes: side magnetic parts, the number and form of the side magnetic parts are not limited by the shape of the housing of the sounding device.
  • the edge magnet part may be composed of a ring magnet and a ring washer, or may be composed of a bar magnet and a washer.
  • the first voice coil 12 and the second voice coil 22 are suspended in a magnetic gap formed by the side magnet part and the center magnet. In the embodiment shown in FIG. 3, the first voice coil 12 and the second voice coil 22 are respectively inserted into the magnetic gap formed by the center magnet and the side magnet part from the upper side and the lower side of the magnetic circuit system. in.
  • the central magnet includes: two first magnets 311.
  • the two first voice coils 12 have the same size and are arranged side by side in the magnetic gap formed by the first magnet 311 and the side magnet part.
  • the two energized first voice coils 12 vibrate in a magnetic field, and the two vibrating first voice coils 12 jointly drive the first diaphragm 11 to produce sound, which converts mechanical energy into sound energy.
  • the two first voice coils 12 are of the same size and arranged side by side, the structure is more compact, the magnetic gap between the two first voice coils 12 is smaller, and higher magnetic performance can be obtained, which helps to improve the acoustic performance of the sound generating device.
  • the support 32 includes a frame portion 321 adjacent to the first diaphragm 11 and having a hollow, and a central portion 322 adjacent to the second diaphragm 21.
  • the hollow area is located in the central area of the frame body 321.
  • the shape and size of the frame body 321 can be adapted according to the size of the sound generating device.
  • the shape and size of the hollow area and the central part 322 can be adapted according to the magnetic circuit system. Make a selection.
  • the shapes of the frame body portion 321, the hollow area and the central portion 322 are all rectangular.
  • the central portion 322 is arranged relative to the central area of the frame portion 321.
  • the central portion 322 is located above or below the frame portion 321, and the central portion 322 is supported on the frame portion 321 through the connecting portion 323.
  • the connecting portion 323 may It has a sheet-like or strip-like structure, and the connecting portion 323 is connected to the frame portion 321 so that a gap is formed between the central portion 322 and the frame portion 321.
  • the support 32 is located in the magnetic circuit system, and the central portion 322 is provided with the first magnet 311 and the first washer 34 on the surface facing the first diaphragm 11 in sequence. .
  • the height difference between the central portion 322 and the frame portion 321 can just accommodate the first magnet 311 and the first washer 34.
  • the second voice coil 22 is inserted into the gap between the central portion 322 and the frame portion 321 to share a magnetic circuit system with the first voice coil 12. In this way, the first voice coil and the second voice coil located in the magnetic gap obtain higher magnetic performance, and the acoustic performance of the sound device is better.
  • the side magnet part includes a side magnet 331 and a side washer 332 which are sequentially arranged on the surface of the frame body part facing the second diaphragm 21.
  • the first voice coil 12 is suspended in the magnetic gap formed by the first magnet 311, the first washer 34, the side magnet 331 and the frame portion 321, and the support 32 is on the long axis.
  • the frame portion 321 of the direction is at the same height as the first washer 34 located in the middle of the magnetic circuit system.
  • the first magnet 311 is located on the side of the first washer 34 away from the first diaphragm 11.
  • the first magnet 311 and the side The magnets 331 are arranged opposite to the two sides of the first voice coil 12.
  • the gap reserved for the first voice coil 12 between the frame portion 321 of the support 32 and the first washer 34 is small, which further modifies the magnetic field lines and enhances the magnetic efficiency.
  • the second voice coil 22 is suspended in a magnetic gap surrounded by the first magnet 311, the central part 322, the side magnets 331 and the side washers 332.
  • the frame body part and the center part of the support member cooperate with the first washer and the side washer in the first vibration system and the second vibration system respectively to correct the magnetic field lines.
  • the central part 322 of the support 32 stably arranges the first magnet 311 and the first washer 34 in the magnetic circuit system and is shared by the upper and lower first vibration system and the second vibration system.
  • the multiple voice coil drive mode helps to reduce the aspect ratio of the side magnets, center magnets, etc. in the magnetic circuit system. It saves materials and reduces costs, while also helping to reduce process difficulty and improve Yield.
  • the side magnet part includes a side magnet 331 and a side washer 332.
  • the housing includes a first housing 41 and a second housing 42, and the first housing 41 and the second housing 42 are used to support and fix the components in the sound generating device.
  • the support 32 is injection molded on the first housing 41, and the frame portion 321 of the support 32 can be used as a side washer, which saves materials.
  • the edge washer 332 is injection molded into the second housing 42. Compared with the traditional bonding process, the support member and the edge washer fixed by the injection molding process are used for the sound device. The structural strength and stability have been improved.
  • the magnetic circuit system further includes: a second magnet 35, and the second voice coil 22 is suspended in a magnetic gap formed by the second magnet 35 and the side magnet portion.
  • the second magnet 35 and the two side-by-side first magnets 311 are arranged directly opposite to each other.
  • the two vibration systems work at the same time, they have better effects of resisting swing and polarization.
  • the two first voice coils 12 in the first vibration system cooperate with the first diaphragm 11 to reduce the amplitude of vibration and increase the loudness of the sound generating device.
  • the side magnets 331 in the first vibration system and the second vibration system are arranged on both sides of the support 32 in the vibration direction, and the side magnets 331 in the two vibration systems have the same size. , It is convenient for large-scale production and reduces the difficulty of assembly.
  • the number and arrangement of the second voice coil 22 and the first voice coil 12 are the same. That is, the number and orientation of the first voice coil, the second voice coil, the first diaphragm, and the second diaphragm in the first vibration system and the second vibration system are the same.
  • two first voice coils 12 and two second voice coils 22 are provided in the first vibration system and the second vibration system, respectively, and there are two vibrations with the voice coil. Matching multiple magnets and washers, etc.
  • the two vibration systems are arranged in the same manner, and the vibration balance of the vibration system is better.
  • the vibration systems on both sides of the support vibrate in the opposite direction, the overall vibration problem of the sounding device can be significantly offset.
  • this kind of sounding device produces sound on both sides, and the first voice coil and the second voice coil can be connected in parallel or in series to jointly drive the vibration system to work.
  • the first voice coil and the second voice coil in the two vibration systems can be independently connected to electrical signals and controlled separately. By adjusting the electrical signal, the purpose of suppressing the polarization of the sound device and improving the vibration can be achieved.
  • the support plate has a flat structure. As shown in FIGS. 5 and 6, the support separates the first vibration system and the second vibration system, and the second magnet and the second washer are sequentially arranged on the surface of the support.
  • the sound emitting device further includes: two sets of centering support pieces.
  • two sets of centering support pieces 50 are respectively arranged between the first vibration system and the second vibration system, and pads are also provided on the centering support pieces 50, and the first A voice coil 12 and the second voice coil 22 are respectively connected to the pads on the centering support piece 50, and the two sets of centering support pieces are connected through the metal insert to access external electrical signals.
  • the first vibration system and the second vibration system can respectively access external signals and work independently. For example, you can choose to let only one of the vibration systems work to realize the single-sided sound of the sounding device; or, choose the vibration system on one side to vibrate in the opposite direction to compensate the acoustic performance of the vibration system on the other side.
  • an electronic product in another aspect of the present invention, is also provided.
  • the electronic product includes the above-mentioned sound emitting device and an electronic product main body, the sound emitting device is arranged in the electronic product main body, the electronic product main body has a sound outlet, and the sound outlet is used for transmitting the sound generated by the sound emitting device. Out.

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

Abstract

La présente invention concerne un dispositif de génération de son et un produit électronique. Le dispositif de génération de son comprend : un boîtier, et, disposés sur le boîtier : un premier système de vibration, le premier système de vibration comprenant une première membrane et, disposées à intervalles sur la première membrane, au moins deux premières bobines vocales; un second système de vibration, le second système de vibration comprenant une seconde membrane et, disposées sur la seconde membrane, au moins deux secondes bobines vocales, la seconde membrane étant disposée par rapport à la première membrane; un système de circuit magnétique, le système de circuit magnétique comprenant un aimant central et un élément de support, l'élément de support étant disposé entre le premier système de vibration et le second système de vibration. Un effet technique de la présente invention est que le dispositif de génération de son est plus léger et présente de meilleures performances acoustiques.
PCT/CN2019/129737 2019-03-14 2019-12-30 Dispositif de génération de son et produit électronique WO2020181893A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910195398.1 2019-03-14
CN201910195398.1A CN111698621B (zh) 2019-03-14 2019-03-14 发声装置和电子产品

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WO2020181893A1 true WO2020181893A1 (fr) 2020-09-17

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PCT/CN2019/129737 WO2020181893A1 (fr) 2019-03-14 2019-12-30 Dispositif de génération de son et produit électronique

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CN (1) CN111698621B (fr)
WO (1) WO2020181893A1 (fr)

Cited By (3)

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CN114257932A (zh) * 2021-02-07 2022-03-29 歌尔股份有限公司 扬声器和电子设备
CN114554367A (zh) * 2021-04-01 2022-05-27 歌尔股份有限公司 发声装置和电子设备
CN114257932B (zh) * 2021-02-07 2024-05-31 歌尔股份有限公司 扬声器和电子设备

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN113068105B (zh) 2021-05-07 2023-03-24 台湾立讯精密有限公司 双面扬声装置

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CN103209377A (zh) * 2013-03-19 2013-07-17 歌尔声学股份有限公司 多功能扬声器
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CN114257932B (zh) * 2021-02-07 2024-05-31 歌尔股份有限公司 扬声器和电子设备
CN114554367A (zh) * 2021-04-01 2022-05-27 歌尔股份有限公司 发声装置和电子设备
CN114554367B (zh) * 2021-04-01 2023-10-03 歌尔股份有限公司 发声装置和电子设备

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