WO2021223255A1 - Dispositif sonore - Google Patents

Dispositif sonore Download PDF

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Publication number
WO2021223255A1
WO2021223255A1 PCT/CN2020/090297 CN2020090297W WO2021223255A1 WO 2021223255 A1 WO2021223255 A1 WO 2021223255A1 CN 2020090297 W CN2020090297 W CN 2020090297W WO 2021223255 A1 WO2021223255 A1 WO 2021223255A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixed
magnet
auxiliary
main
magnetic
Prior art date
Application number
PCT/CN2020/090297
Other languages
English (en)
Chinese (zh)
Inventor
张古清
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2021223255A1 publication Critical patent/WO2021223255A1/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
    • 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
    • H04R9/025—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
    • H04R9/04—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 invention relates to the field of electro-acoustic conversion, in particular to a sound-producing device applied to electronic sound box products.
  • the related art sounding device includes a basin frame, a vibration system respectively fixed to the basin frame, and a magnetic circuit system with a magnetic gap.
  • the vibration system includes a diaphragm fixed to the frame, a voice coil fixed to the diaphragm and inserted into the magnetic gap to drive the diaphragm to vibrate and produce sound, and fixed to the frame and connected to the The voice coil is away from the elastic support component connected to one end of the diaphragm.
  • the magnetic circuit system includes a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, and a first auxiliary magnetic steel and a second auxiliary magnetic steel which are ringed on the main magnetic steel and formed the magnetic gap with the main magnetic steel.
  • the first auxiliary magnet is located on the side of the long side of the main magnet
  • the second auxiliary magnet is located on the side of the short side of the main magnet.
  • the elastic support assembly includes elastic pieces located on opposite sides of the main magnetic steel short axis, and the elastic pieces include a first fixed arm fixed to the basin frame, a second fixed arm fixed to the voice coil, and An elastic arm connecting the first fixed arm and the second fixed arm, the first fixed arm, the second fixed arm, and the elastic arm collectively enclose a containing space, and the second auxiliary magnet It is located in the accommodating space and is spaced apart from the elastic member.
  • the second fixing arm of the elastic support assembly is one The overall structure, and the width of the gluing surface is greater than the width of the voice coil.
  • the purpose of the present invention is to provide a sound generating device with high sensitivity and better acoustic performance.
  • the present invention provides a sound emitting device, which includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system with a magnetic gap;
  • the vibration system includes a frame fixed to the basin A diaphragm of the frame, a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound, and an elastic support component fixed to the basin frame and connected to an end of the voice coil away from the diaphragm;
  • the magnetic circuit system includes a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, two first auxiliary magnetic steels respectively located on opposite sides of the main magnetic steel, and two second auxiliary magnetic steels respectively located on the other opposite sides of the main magnetic steel.
  • a second auxiliary magnet, the first auxiliary magnet and the second auxiliary magnet are spaced apart from the main magnet and jointly enclose the magnetic gap
  • the elastic support assembly includes Elastic pieces arranged on opposite sides of the steel and spaced apart from the second secondary magnetic steel;
  • the elastic member includes a first fixed arm fixed to the basin frame, two second fixed arms connected to the voice coil and spaced apart from each other, and respectively connecting the two second fixed arms to the first fixed arm.
  • Two elastic arms of a fixed arm, the first fixed arm, the second fixed arm, and the elastic arm jointly enclose an opening-shaped accommodating space facing the direction of the main magnetic steel, and the second auxiliary magnetic Steel is accommodated in the accommodation space;
  • the second auxiliary magnet extends in the direction of the main magnet, and/or the main magnet extends in the direction of the second auxiliary magnet, so that the magnetic gap is close to the direction of the second auxiliary magnet.
  • the part has the same width as the part of the magnetic gap close to the first secondary magnet.
  • the main magnet includes a main magnet body and protrusions protruding and extending from opposite sides of the main magnet body, and the protrusions are directly opposite and spaced from the second auxiliary magnet. set up.
  • the magnetic circuit system further includes a main pole core fixed to the main magnet on a side close to the vibration system, and the main pole core is directed toward the main pole of the main magnet along the vibration direction of the diaphragm.
  • the projection completely coincides with the main magnet.
  • the main magnet is rectangular, the two first auxiliary magnets are respectively located on opposite sides of the long axis of the main magnet, and the two second auxiliary magnets are respectively located on the main magnet.
  • the short axis is on opposite sides.
  • the elastic support assembly includes two and are respectively located on opposite sides of the short axis of the main magnet.
  • the elastic member is a flexible circuit
  • each of the elastic support components further includes an auxiliary diaphragm attached and fixed to a side of the elastic member close to the diaphragm.
  • the auxiliary diaphragm includes a first fixing part fixed to the first fixing arm, two second fixing parts fixed to the two second fixing arms, and two second fixing parts respectively.
  • the part is connected to the two folding ring parts of the first fixing part, and the cross section of the folding ring part is an arc-shaped structure protruding in the direction of the diaphragm.
  • the voice coil is electrically connected to the elastic member.
  • the magnetic circuit system further includes an upper splint, the upper splint comprising a ring-shaped fixing ring fixed to the basin frame, and two second magnets extending from the fixing ring to the first secondary magnet.
  • a secondary pole core and two second secondary pole cores extending from the fixed ring to the second secondary magnetic steel, and the two first secondary pole cores are superimposed and fixed to the two first secondary magnets respectively Steel, the two second secondary pole cores are respectively superposed and fixed to the two second secondary magnetic steels.
  • the voice coil includes a voice coil body fixed to the diaphragm and a voice coil fixing portion extending from the voice coil body away from the diaphragm and fixed to the elastic support component, along the direction perpendicular to the diaphragm.
  • the thickness of the voice coil fixing portion in the vibration direction of the diaphragm is greater than the thickness of the voice coil body.
  • the sound generating device of the present invention is provided with a main magnet fixed to the yoke, two first auxiliary magnets and two second auxiliary magnets arranged on the peripheral side of the main magnet, and the second auxiliary The magnet extends in the direction of the main magnet, and/or the main magnet extends in the direction of the second auxiliary magnet, so that the part of the magnetic gap close to the second auxiliary magnet has the same width as the part of the magnetic gap close to the first auxiliary magnet .
  • the elastic support assembly includes an elastic member.
  • the first fixed arm, the second fixed arm, and the elastic arm of the elastic member jointly enclose a receiving space that is open toward the main magnetic steel, and the second auxiliary magnetic steel is accommodated in the receiving space.
  • this structure makes the second auxiliary magnet or main magnet not limited to the second fixed arm to block, then the second auxiliary magnet can extend to the direction of the main magnet, or the main magnet can extend to the second auxiliary magnet , In order to reduce the width of the magnetic gap, to achieve the same width of the magnetic gap on the long and short axis sides of the main magnetic steel, so as to maximize the magnetic field of the magnetic circuit, and make the acoustic performance of the sound device excellent.
  • Fig. 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention
  • FIG. 2 is an exploded view of a part of the three-dimensional structure of the sound generating device of the present invention
  • Figure 3 is a cross-sectional view taken along line A-A in Figure 1;
  • Figure 4 is an enlarged view of the part shown in Figure 3 B;
  • FIG. 5 is a schematic diagram of the three-dimensional structure of the voice coil of the sound generating device of the present invention.
  • FIG. 6 is a schematic diagram of the three-dimensional structure of the elastic support assembly of the sound device of the present invention.
  • FIG. 7 is a schematic diagram of the three-dimensional structure of the main magnetic steel of the sound device of the present invention.
  • FIG. 8 is a schematic diagram of the three-dimensional structure of the upper clamping plate of the sound generating device of the present invention.
  • FIG. 9 is a schematic diagram of the assembled stereo structure of the sound device of the present invention with the diaphragm, the basin frame and the upper splint removed;
  • Fig. 10 is a schematic diagram of the assembled three-dimensional structure of the sound generating device of the present invention with the yoke and the elastic member removed.
  • the present invention provides a sound generating device 100, which includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3 respectively supported on the basin frame 1, the magnetic circuit system 3 has a magnetic In the gap 30, the magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.
  • the basin frame 1 is used to fix the vibration system 2 and the magnetic circuit system 3.
  • the vibration system 2 includes a diaphragm 21 fixed to the frame 1, a voice coil 22 fixed to the diaphragm 21 and inserted into the magnetic gap 30 to drive the diaphragm 21 to vibrate and produce sound, and a voice coil 22 fixed to the diaphragm 21.
  • the basin frame 1 is connected to an elastic support assembly 23 at one end of the voice coil 22 away from the diaphragm 21.
  • the voice coil 22 includes a voice coil body 221 fixed to the diaphragm 21, and a voice coil body 221 extending away from the diaphragm 21 and fixed to the elastic support component 23. ⁇ 222 ⁇ ⁇ 222.
  • the thickness of the voice coil fixing portion 222 perpendicular to the vibration direction of the diaphragm 21 is greater than the thickness of the voice coil body 221. This structure enables the elastic support component 23 to be attached and fixed to the voice coil fixing portion 222 at an end away from the diaphragm 21 with a larger width, which can be attached more firmly.
  • the magnetic circuit system 3 includes a magnetic yoke 31 fixed to the basin frame 1, a main magnetic steel 32 fixed to the magnetic yoke 31, and two first secondary magnetic steels respectively located on opposite sides of the main magnetic steel 32 Steel 33 and two second secondary magnets 34 located on the other opposite sides of the main magnet 32 respectively.
  • the main magnet 32 and/or the first auxiliary magnet 33 and the second auxiliary magnet 34 are fixed to the basin frame 1, so as to realize the fixing of the magnetic circuit system 3 to the basin. ⁇ 1.
  • the first sub-magnet 33 and the second sub-magnet 34 are spaced apart from the main magnet 32 and jointly enclose the magnetic gap 30, and the elastic support assembly 23 is connected to the second sub-magnet. 34 interval settings.
  • the main magnet 32 is rectangular.
  • the two first secondary magnets 33 are respectively located on opposite sides of the long axis of the main magnet 32; the two second secondary magnets 34 are respectively located on opposite sides of the short axis of the main magnet 32.
  • the second auxiliary magnet 34 extends in the direction of the main magnet 32, and/or the main magnet 32 extends in the direction of the second auxiliary magnet 34, so that the magnetic gap 30 is close to the first magnet.
  • the part of the second secondary magnet 34 has the same width as the part of the magnetic gap 30 close to the first secondary magnet 33.
  • the main magnet 32 includes a main magnet body 321 and protrusions 322 protruding from opposite sides of the main magnet body 321.
  • the protruding portion 322 and the second secondary magnet 34 are directly opposed to and spaced apart from the second secondary magnet 34. That is to say, the magnetic gap 30 formed by the protruding portion 322 and the second secondary magnet 34, the distance between the protruding portion 322 and the second secondary magnet 34 and the main magnet body
  • the distance between the 321 and the first secondary magnetic steel 33 is the same, that is, the distances of the magnetic gaps 30 formed are the same.
  • This structure makes the sound emitting device 100 high in sensitivity, so that the sound emitting device 100 has excellent acoustic performance.
  • the magnetic circuit system 3 further includes a main pole core 35 fixed to the main magnet 32 on the side close to the vibration system 2, and the main pole core 35
  • the projection of the main magnet 32 along the vibration direction of the diaphragm 21 completely overlaps the main magnet 32. That is to say, the shape of the main pole core 35 is the same as the shape of the main magnet 32, thereby increasing the main magnet 32 and the first auxiliary magnet 33 and the second auxiliary magnet 34, respectively.
  • the magnetic field strength forming the magnetic gap 30 can also increase the magnetic field strength of the protrusion 322 and the second auxiliary magnet 34 forming the magnetic gap 30, and can also increase the main magnet body 321
  • the magnetic field strength of the magnetic gap 30 is formed with the first secondary magnetic steel 33.
  • the magnetic circuit system 3 It also includes an upper splint 36.
  • the upper splint 36 includes a ring-shaped fixing ring 361 fixed to the basin frame 1, and two first pairs extending from the fixing ring 361 to the first pair of magnets 33.
  • the pole core 362 and the two second secondary pole cores 363 extending from the fixed ring 361 to the second secondary magnet 34, and the two first secondary pole cores 362 are superimposed and fixed to the two first secondary poles.
  • a pair of magnets 33, and two of the second sub-pole cores 363 are stacked and fixed to the two of the second sub-magnets 34, respectively. Since the fixing ring 361 is fixed to the basin frame 1, the main magnet 32 and/or the first secondary pole core 362 and the second secondary magnet 34 are fixed to the The basin frame 1 thus realizes the fixing of the magnetic circuit system to the basin frame 1.
  • the elastic support assembly 23 includes two and is respectively located on opposite sides of the short axis of the main magnet 32.
  • the two elastic support components 23 are arranged to form a symmetrical structure, so that the support effect of the two elastic support components 23 on the voice coil 22 is more stable, and the lateral swing effect of the anti-voice coil 22 is better.
  • the elastic support assembly 23 includes an elastic member 232 located on opposite sides of the main magnet 32 and spaced apart from the second auxiliary magnet 34, and an elastic member 232 that is closely fixed to the elastic member 232.
  • the auxiliary diaphragm 231 on the side of the diaphragm 21.
  • the elastic member 232 includes a first fixed arm 2321 fixed to the basin frame 1, two second fixed arms 2323 connected to the voice coil 22 and spaced apart from each other, and two second fixed arms 2323 respectively. 2323 is connected to the two elastic arms 2322 of the first fixed arm.
  • the first fixed arm 2321, the second fixed arm 2323, and the elastic arm 2313 together form an opening toward the main magnet 32 In the accommodating space 230, the second sub-magnet 34 is accommodated in the accommodating space 230.
  • the accommodating space 230 formed by the two second fixed arms 2323 spaced apart from each other makes the second auxiliary magnet 34 or the main magnet 32 not limited to the size of the second fixed arm 2323 Blocked, the second secondary magnet 34 may extend toward the main magnet 32, or the main magnet 32 may extend toward the second secondary magnet 34 to reduce the width of the magnetic gap 30 , To achieve the same width of the magnetic gap 30 on the long and short axis sides of the main magnet 32, so as to maximize the magnetic field of the magnetic circuit system 3, so that the sound generating device 100 has excellent acoustic performance.
  • the auxiliary diaphragm 231 includes a first fixed part 2311 fixed to the first fixed arm 2321, two second fixed parts 2313 fixed to the two second fixed arms 2323, and two second fixed parts 2313 respectively.
  • the two fixing portions 2323 are connected to the two folding ring portions 2312 of the first fixing portion 2311, and the cross section of the folding ring portion 2312 is an arc structure protruding toward the diaphragm 21.
  • each of the second fixing portions 2313 and the adjacent one of the second fixing arms 2323 are attached and fixed to form an integrated structure, which has a more stable supporting effect on the voice coil 22, and this structure suppresses the voice coil 22 from swinging.
  • the elastic support assembly 23 does not affect the magnetic gap 30, and the design of the magnetic circuit system is optimized, so that the acoustic performance of the sound generating device 100 is better, and the elastic support assembly 23 is easy to improve.
  • the auxiliary diaphragm 231 is made of a polymer material, for example, it is made of at least one of polymer materials such as silica gel, rubber, PEEK, PEL, and TPU.
  • the material of the auxiliary diaphragm 232 is not limited to this.
  • the voice coil 22 is a rectangle with rounded corners, and the voice coil 22 includes two short sides, two long sides, and four adjacent short sides and one long side. With rounded corners, the two short sides are located on opposite sides of the short axis of the main magnet 32 respectively.
  • the two second fixing parts 2313 are respectively fixed to the same short side. This structure makes the arrangement of the two second fixing parts 2313 form a symmetrical structure, so that the two elastic support components 23 are opposed to the The support effect of the voice coil 22 is more stable, and the lateral swing effect of the voice coil 22 is better.
  • the elastic member 232 is a flexible circuit board, and the voice coil 22 is electrically connected to the elastic member 232. On the one hand, it is used to provide support for the voice coil 22, and on the other hand, to introduce external electrical signals to the voice coil 22, which avoids the problem of easy disconnection when external electrical signals are introduced into the voice coil 22 through leads, and improves Its reliability.
  • the sound generating device of the present invention is provided with a main magnet fixed to the yoke, two first auxiliary magnets and two second auxiliary magnets arranged on the peripheral side of the main magnet, and the second auxiliary The magnet extends in the direction of the main magnet, and/or the main magnet extends in the direction of the second auxiliary magnet, so that the part of the magnetic gap close to the second auxiliary magnet has the same width as the part of the magnetic gap close to the first auxiliary magnet .
  • the elastic support assembly includes an elastic member.
  • the first fixed arm, the second fixed arm, and the elastic arm of the elastic member jointly enclose a receiving space that is open toward the main magnetic steel, and the second auxiliary magnetic steel is accommodated in the receiving space. In the space, this structure allows the second auxiliary magnet or main magnet to be blocked by the second fixed arm, and the second auxiliary magnet can extend to the direction of the main magnet, or the main magnet can extend to the second auxiliary magnet.

Abstract

La présente invention concerne un dispositif sonore, comprenant un cadre de bassin, un système de vibration et un système de circuit magnétique. Le système de vibration comprend une membrane, une bobine mobile et un ensemble de support élastique. Le système de circuit magnétique comprend une culasse magnétique, un acier magnétique principal, un premier acier magnétique auxiliaire et un second acier magnétique auxiliaire. Le premier acier magnétique auxiliaire et le second acier magnétique auxiliaire sont tous deux espacés de l'acier magnétique principal et forment ensemble un entrefer magnétique. L'ensemble de support élastique comprend un élément élastique. L'élément élastique comprend un premier bras fixe, deux seconds bras fixes espacés l'un de l'autre et deux bras élastiques. Le premier bras fixe, les seconds bras fixes et les bras élastiques forment ensemble un espace de réception qui est ouvert vers la direction de l'acier magnétique principal, et le second acier magnétique auxiliaire est logé dans l'espace de réception. Le second acier magnétique auxiliaire s'étend vers la direction de l'acier magnétique principal, et/ou l'acier magnétique principal s'étend vers la direction du second acier magnétique auxiliaire, de telle sorte que la largeur d'une partie de l'espace magnétique proche du second acier magnétique auxiliaire est la même que la largeur d'une partie de l'espace magnétique à proximité du premier acier magnétique auxiliaire. Par rapport à l'art apparenté, le dispositif sonore de la présente invention présente une sensibilité élevée et de meilleures performances acoustiques.
PCT/CN2020/090297 2020-05-08 2020-05-14 Dispositif sonore WO2021223255A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010390413.0 2020-05-08
CN202010390413.0A CN111641901B (zh) 2020-05-08 2020-05-08 发声器件

Publications (1)

Publication Number Publication Date
WO2021223255A1 true WO2021223255A1 (fr) 2021-11-11

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Application Number Title Priority Date Filing Date
PCT/CN2020/090297 WO2021223255A1 (fr) 2020-05-08 2020-05-14 Dispositif sonore

Country Status (2)

Country Link
CN (1) CN111641901B (fr)
WO (1) WO2021223255A1 (fr)

Cited By (1)

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CN116887145A (zh) * 2023-08-10 2023-10-13 汉得利（常州）电子股份有限公司 一种磁路结构及双面扬声器

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CN218570449U (zh) * 2022-06-30 2023-03-03 瑞声光电科技(常州)有限公司 发声器件

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CN204350290U (zh) * 2015-01-30 2015-05-20 江西联创宏声电子有限公司 一种超薄微型电声器装置
CN204906154U (zh) * 2015-07-30 2015-12-23 瑞声光电科技(常州)有限公司 振动电机
CN205622865U (zh) * 2016-03-31 2016-10-05 歌尔股份有限公司 扬声器单体以及扬声器模组
WO2019205657A1 (fr) * 2018-04-27 2019-10-31 歌尔股份有限公司 Unité de production de son, module de production de son, et terminal électronique
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Publication number Priority date Publication date Assignee Title
CN116887145A (zh) * 2023-08-10 2023-10-13 汉得利（常州）电子股份有限公司 一种磁路结构及双面扬声器
CN116887145B (zh) * 2023-08-10 2024-01-26 汉得利（常州）电子股份有限公司 一种磁路结构及双面扬声器

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