WO2021128334A1 - Dispositif de production de sons et son caisson de haut-parleur - Google Patents

Dispositif de production de sons et son caisson de haut-parleur Download PDF

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Publication number
WO2021128334A1
WO2021128334A1 PCT/CN2019/129405 CN2019129405W WO2021128334A1 WO 2021128334 A1 WO2021128334 A1 WO 2021128334A1 CN 2019129405 W CN2019129405 W CN 2019129405W WO 2021128334 A1 WO2021128334 A1 WO 2021128334A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm
diaphragm
voice coil
fixed
magnetic
Prior art date
Application number
PCT/CN2019/129405
Other languages
English (en)
Chinese (zh)
Inventor
宋威
张帆
金鑫
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
Priority to PCT/CN2019/129405 priority Critical patent/WO2021128334A1/fr
Publication of WO2021128334A1 publication Critical patent/WO2021128334A1/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
    • 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 field of sound and electricity, in particular to a sound-producing device used in portable electronic products and a speaker box thereof.
  • the sound device in the related art includes a basin frame, a vibration system respectively supported on the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound;
  • the vibration system includes a diaphragm and is inserted in the magnetic gap
  • a voice coil used to drive the diaphragm to vibrate and produce sound and an elastic conductive member connected to the side of the voice coil away from the diaphragm;
  • the elastic conductive member is a flexible circuit board, and the voice coil extends
  • the voice coil lead is electrically connected with the elastic conductive member.
  • the voice coil lead is often suspended inside the sounding device. During the vibration process, the voice coil lead is easily damaged or detached from the elastic conductive member, making the voice coil unable to work normally, resulting in the sounding device and the speaker. The vibration and sound of the box have low reliability.
  • the purpose of the present invention is to provide a sound device and its speaker box with high reliability.
  • the present invention provides a sounding device, which includes a basin frame, a vibration system respectively supported on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap;
  • the vibration system includes a diaphragm and a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound; the vibration system further includes:
  • the elastic conductive member includes a first fixed arm connected to the basin frame, a second fixed arm spaced apart from the first fixed arm, and a connection between the first fixed arm and the second fixed arm.
  • the first elastic arm of the arm and two pads protruding and extending from opposite ends of the second fixed arm; and,
  • a skeleton comprising a skeleton body supported on the side of the second fixed arm close to the diaphragm and connected to the diaphragm, and a skeleton body bent and extended from the skeleton body in a direction close to the magnetic circuit system
  • An extension wall the extension wall partly extends into the magnetic gap
  • the voice coil includes a voice coil body supported and fixed to the extension wall and inserted into the magnetic gap, and the voice coil body is bent and extended in the direction of the pad and is electrically connected to the pad.
  • the voice coil lead, the voice coil lead is attached to the extension wall and extends along the extension wall to the pad.
  • the second fixed arm includes a first arm connected to the first elastic arm and connected to two pads at both ends, located on a side of the first arm away from the first fixed arm and A second arm spaced apart from the first arm and a second elastic arm connecting the second arm and the first arm; the skeleton body is fixed to the first arm, and the extension wall is formed by the The frame body is formed by bending and extending one end close to the pad.
  • the elastic conductive members include two and are spaced apart from each other, the skeleton includes two and are respectively connected to the two elastic conductive members, and the skeleton body of each of the skeletons is close to the magnetic circuit system
  • the opposite ends of the two extension walls are respectively bent and extended to form two extension walls;
  • the voice coil leads include two, and the two voice coil leads are respectively attached and fixed to the two extension walls of the same frame body And respectively extend along the corresponding extension wall.
  • the voice coil body has a rectangular structure with rounded corners, and the four extension walls are respectively fixedly connected to the positions of the four rounded corners of the voice coil body.
  • the magnetic circuit system includes a magnetic yoke fixed on the side of the frame away from the diaphragm, a main magnetic steel fixed on the side of the magnetic yoke close to the diaphragm, and fixed on the magnetic yoke
  • a secondary magnetic steel that is close to the side of the diaphragm and is spaced from the main magnetic steel to form the magnetic gap, the secondary magnetic steel is provided with a relief opening, and the extension wall extends through the relief opening to the Within the magnetic gap.
  • each of the frameworks surrounds and encloses a vacant space;
  • the auxiliary magnets include two first auxiliary magnets arranged at intervals on opposite sides of the main magnet, and two first auxiliary magnets arranged at intervals on the main magnet.
  • Two second auxiliary magnets on opposite sides, each of the first auxiliary magnets is accommodated in the relief space on the same side and is spaced apart from the second arm on that side;
  • the first sub-magnet and the second sub-magnet are spaced apart to form the relief opening, and each of the extension walls extends through the corresponding relief opening and into the magnetic gap.
  • each of the skeleton body includes a first section connected to the first arm and two second sections bent and extended from opposite ends of the first section in a direction close to the magnetic circuit system, and The two second sections are respectively connected to the first arm; the two second sections of the same skeleton body are respectively bent and extended to form two extension walls, and the relief space is formed by the same The first section, the two second sections and the two extension walls of the skeleton body are jointly enclosed.
  • the basin frame includes a bottom wall, an outer side wall extending from the outer side of the bottom wall toward the diaphragm along the vibration direction of the diaphragm, and an outer side wall extending from the inner side of the bottom wall toward the vibration direction along the vibration direction.
  • the inner side wall of the film extending, the inner side wall encloses an accommodating space, and the inner side wall is provided with a relief groove penetrating the inner side wall, and the magnetic circuit system is accommodated in the accommodating space and fixedly supported on the The bottom wall;
  • the first fixed arm is fixedly supported on the outer side wall, the second arm is fixedly supported on the inner side wall;
  • the diaphragm includes a first fixed portion fixed to the outer side wall, fixed to the The second fixing portion of the inner side wall and the vibrating portion connecting the first fixing portion and the second fixing portion, the skeleton body is connected to the vibrating portion, and the extension wall passes through the relief groove to Extend into the magnetic gap.
  • the vibration system further includes an auxiliary diaphragm
  • the auxiliary diaphragm includes a third fixing portion connected to a side of the first arm away from the diaphragm, and connected to the second arm away from the diaphragm.
  • a fourth fixing portion on one side of the film and fixing the inner side wall and a folding ring portion connecting the third fixing portion and the fourth fixing portion and arranged opposite to the two third arms at intervals.
  • the elastic conductive member is a flexible circuit board electrically connected to the voice coil.
  • the present invention provides a loudspeaker box, which includes the sound emitting device of the present invention and a cover plate, the cover plate is arranged on the side of the basin frame away from the magnetic circuit system and is enclosed with the basin frame to accommodate
  • the vibration system and the magnetic circuit system are respectively accommodated in the accommodating space, the diaphragm is clamped and fixed between the cover plate and the basin frame; the diaphragm and the cover plate
  • a front sound cavity is jointly enclosed, the diaphragm and the basin frame jointly surround a rear cavity, and the cover plate is provided with a sound outlet that communicates the front sound cavity with the outside.
  • the voice coil includes a voice coil body supported and fixed to the extension wall and inserted into the magnetic gap, and a voice coil body facing the bonding pad.
  • the voice coil lead is bent and extended in the direction of, and is electrically connected to the pad.
  • the voice coil lead is attached and fixed to the extension wall and extends to the pad along the extension wall, which improves the performance of the voice coil lead.
  • the assembly strength effectively improves the reliability of the voice coil lead fixing.
  • the voice coil lead vibrates with the vibration of the extension wall, making the voice coil lead and the pad relatively static, ensuring the voice coil lead in the vibration process It will not be damaged or fall off from the pad, improve the reliability of the electrical connection between the voice coil lead and the pad, and effectively make the sound-producing device high in reliability.
  • the sound-producing device is applied to the speaker of the present invention. In the box, the reliability of the speaker box is high.
  • Figure 1 is a schematic diagram of the three-dimensional structure of the speaker box of the present invention.
  • Figure 2 is an exploded view of a part of the three-dimensional structure of the speaker box of the present invention.
  • Fig. 3 is a schematic diagram of a partial three-dimensional structure assembly of the sound generating device of the present invention.
  • Fig. 4 is an enlarged view of the part shown in A in Fig. 3;
  • Figure 5 is a top view of Figure 3;
  • Fig. 6 is an enlarged view of the part shown in B in Fig. 5;
  • Figure 7 is a schematic cross-sectional view of the speaker box of the present invention.
  • Fig. 8 is an enlarged view of the part shown in C in Fig. 7;
  • Figure 9 is a schematic cross-sectional view of the speaker box of the present invention from another angle
  • Fig. 10 is an enlarged view of the part shown in D in Fig. 9.
  • the present invention provides a speaker box 200 and a sound emitting device 100 respectively.
  • the sound generating device 100 includes a basin frame 1, a vibration system 2 respectively supported on the basin frame 1, and a magnetic circuit system 3 that drives the vibration system 2 to vibrate and produce sound.
  • the magnetic circuit system 3 has a magnetic gap 30.
  • the vibration system 2 includes a diaphragm 21, an elastic conductive member 22, a skeleton 23 and a voice coil 24.
  • the diaphragm 211 is fixed to one end of the basin frame 1 for vibrating and sounding;
  • the basin frame 1 includes a bottom wall 11 arranged at a distance from the diaphragm 21, and the diaphragm 21 extends from the outside of the bottom wall 11
  • the vibration direction of the outer side wall 12 extending toward the diaphragm 21 and the inner side wall 13 extending from the inner side of the bottom wall 11 along the vibration direction toward the diaphragm 21, the inner side wall 13 encloses an accommodating space 130 , And the inner side wall 13 is provided with a relief groove 1301 passing through it.
  • the diaphragm 21 includes a first fixing portion 211, a second fixing portion 212, and a vibrating portion 213; the first fixing portion 211 is fixed to the outer side wall 12; the second fixing portion 212 is fixed to the The inner side wall 13; the vibrating portion 213 connects the first fixing portion 211 and the second fixing portion 212 for vibration and sound.
  • the elastic conductive member 22 includes a first fixed arm 221, a second fixed arm 222, a first elastic arm 223 and two pads 224.
  • the first fixed arm 221 is connected to the basin frame 1; the second fixed arm 222 and the first fixed arm 221 are spaced apart to support the frame 23; the first elastic arm 223 It includes two, and two of the first elastic arms 223 are connected to the first fixed arm 221 and the second fixed arm 222; the two pads 224 are respectively formed by opposite ends of the second fixed arm 222 Convex extension.
  • the second fixed arm 222 includes a first arm 2221 connected to the first elastic arm 223 and connected to two pads 224 at both ends respectively, and located on the first arm 2221 away from the first arm 2221.
  • a second arm 2222 on one side of the fixed arm 221 and spaced apart from the first arm 2221, and a second elastic arm 2223 connecting the second arm 2222 and the first arm 2221; more specifically, the first arm 2221
  • the fixed arm 221 is fixedly supported on the outer side wall 12, and the second arm 2222 is fixedly supported on the inner side wall 13.
  • the skeleton 23 includes a skeleton body 231 and an extension wall 232, and the skeleton 23 surrounds a concession space 230, and the concession space 230 provides conditions for installing magnetic steel within the scope of the skeleton 23;
  • the skeleton body 231 is supported on the side of the second fixed arm 222 close to the diaphragm 21 and connected to the diaphragm 21;
  • the extension wall 232 is bent by the frame body 231 in a direction close to the magnetic circuit system 3 Extend and partially extend into the magnetic gap 30; specifically, the skeleton body 231 is fixed to the first arm 2221 and connected to the vibrating portion 213 on the side away from the cover plate 4, and the extension wall 232 is formed by bending and extending one end of the frame body 231 close to the bonding pad 224, and the extension wall 232 passes through the relief groove 1301 and extends into the magnetic gap 30.
  • the skeleton body 231 includes a first section 2311 connected to the first arm 2221 and two second sections bent and extended from opposite ends of the first section 2311 in a direction close to the magnetic circuit system 3.
  • Two sections 2312, and the two second sections 2312 are respectively connected to the first arm 2221; the two second sections 2312 of the same skeleton body 231 are respectively bent and extended to form two extension walls 232; the giving way space 230 is enclosed by the first section 2311, the two second sections 2312 and the two extension walls 232 of the same skeleton body 231.
  • the voice coil 24 includes a voice coil body 241 and a voice coil lead 242; the voice coil body 241 is supported and fixed to the extension wall 232 and inserted into the magnetic gap 30; the voice coil lead 242 is supported by the The voice coil body 241 is bent and extended in the direction of the pad 224 and is electrically connected to the pad 224, and the voice coil lead 242 is attached and fixed to the extension wall 232 and extends along the extension wall 232 to The pad 224.
  • the elastic conductive member 22 is a flexible circuit board electrically connected to the voice coil 24, and the elastic conductive member 22 is electrically connected to the voice coil lead 242 through the pad 224.
  • the number of elastic conductive members and skeletons is not limited, and they can be set according to actual conditions.
  • the elastic conductive members 22 include two and are spaced apart from each other.
  • the frame 23 includes two and is respectively connected to the two elastic conductive members 22, and the frame body 231 of each frame 23 closes to the opposite ends of the magnetic circuit system 3 and respectively bends and extends to form two extension walls.
  • the voice coil lead 242 includes two, and the two voice coil leads 242 are respectively attached and fixed to the two extension walls 232 of the same frame body 231 and respectively extend along the corresponding extension walls 232 .
  • the structure of the voice coil body is not limited, and it can be selected according to actual conditions.
  • the voice coil body 241 has a rectangular structure with rounded corners, and the four extension walls 232 is respectively fixedly connected to the four rounded positions of the voice coil body 241.
  • the voice coil lead 242 by attaching and fixing the voice coil lead 242 to the extension wall 232, the overall assembly strength of the voice coil lead 242 is effectively improved, and the reliability of fixing the voice coil lead 242 is improved.
  • the voice coil lead 242 vibrates with the vibration of the extension wall 232, the voice coil lead 242 and the pad 224 are relatively static, which ensures that the voice coil lead 242 will not be damaged or fall off from the pad 224 during the vibration process.
  • the reliability of the electrical connection between the voice coil lead 242 and the bonding pad 224 effectively makes the sound generating device 100 highly reliable.
  • the vibration system 2 may be additionally provided with an auxiliary diaphragm 25 for increasing the elastic rigidity of the elastic conductive member 22, and the auxiliary diaphragm 25 is connected to the elastic
  • the conductive member 22 is far away from the diaphragm 21; specifically, the auxiliary diaphragm 25 includes a third fixing portion 251 connected to the first arm 2221 on the side away from the diaphragm 21, and connected to the first arm 2221.
  • the fourth fixing portion 252 on the side of the second arm 2222 away from the diaphragm 21 and the folding ring connecting the third fixing portion 251 and the fourth fixing portion 252 and arranged opposite to the two third arms 2223 ⁇ 253.
  • the magnetic circuit system 3 is housed in the accommodating space 130 and fixedly supported on the bottom wall 11.
  • the second fixed arms 222 of the two elastic conductive members 22 jointly enclose a hollow area 220, and the magnetic circuit system 3 is located within the hollow area 220 and is connected to two The second fixed arms 222 are arranged at intervals.
  • the magnetic circuit system 3 includes a magnetic yoke 31, a main magnetic steel 32, and an auxiliary magnetic steel (not shown in the figure); the magnetic yoke 31 is fixed on the side of the basin frame 1 away from the diaphragm 21, that is, the magnetic The yoke 31 is fixed to the bottom wall 11; the main magnetic steel 32 is fixed to the side of the magnetic yoke 31 close to the diaphragm 21; the auxiliary magnetic steel is fixed to the magnetic yoke 31 close to the diaphragm 21
  • the magnetic gap 30 is formed on one side and separated from the main magnet 32, and the auxiliary magnet is provided with a relief opening 301, and the extension wall 232 extends to the magnetic gap 30 through the relief opening 301 Inside.
  • the auxiliary magnets include two first auxiliary magnets spaced apart on opposite sides of the main magnet 32.
  • the steel 33 and the two second auxiliary magnets 34 arranged at intervals on the other opposite sides of the main magnet 32; each of the first auxiliary magnets 33 is respectively accommodated in the vacant space 230 on the same side thereof, And each of the first auxiliary magnets 33 is spaced from the second arm 2222 on the side, and the adjacent first auxiliary magnets 33 and the second auxiliary magnets 34 are spaced apart to form a way out 301;
  • Each of the extension walls 232 sequentially passes through the corresponding relief groove 1301 and the relief opening 301 to extend into the magnetic gap 30 and abut against the voice coil body 241.
  • the speaker box includes the above-mentioned sound emitting device 100 and the cover 4.
  • the cover plate 4 is provided on the side of the basin frame 1 away from the magnetic circuit system 3 and encloses a containing space 10 together with the basin frame 1.
  • the vibration system 2 and the The magnetic circuit system 3 is respectively accommodated in the accommodation space 10, the diaphragm 21 is sandwiched and fixed between the cover plate 4 and the basin frame 1, and the diaphragm 21 separates the accommodation space 10
  • a front acoustic cavity 101 and a rear cavity 102 are formed, and the cover plate 4 is provided with a sound outlet 40 that communicates the front acoustic cavity 101 with the outside.
  • the diaphragm 21 and the cover plate 4 jointly enclose the front acoustic cavity 101, and the sound outlet 110 connects the front acoustic cavity 101 with the outside to form a side sounding structure; the diaphragm 21 Together with the basin frame 1, the rear cavity 102 is formed, and the rear cavity 102 is used to improve the low-frequency acoustic performance of the sound emitting device 100.
  • the voice coil includes a voice coil body supported and fixed to the extension wall and inserted into the magnetic gap, and a voice coil body facing the bonding pad.
  • the voice coil lead is bent and extended in the direction of, and is electrically connected to the pad.
  • the voice coil lead is attached and fixed to the extension wall and extends to the pad along the extension wall, which improves the performance of the voice coil lead.
  • the assembly strength effectively improves the reliability of the voice coil lead fixing.
  • the voice coil lead vibrates with the vibration of the extension wall, making the voice coil lead and the pad relatively static, ensuring the voice coil lead in the vibration process It will not be damaged or fall off from the pad, improve the reliability of the electrical connection between the voice coil lead and the pad, and effectively make the sound-producing device high in reliability.
  • the sound-producing device is applied to the speaker of the present invention. In the box, the reliability of the speaker box is high.

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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 fournit un dispositif de production de son, comprenant un cadre de bassin, un système de vibration supporté sur le cadre de bassin, et un système de circuit magnétique pour entraîner le système de vibration à vibrer pour produire un son ; le système de circuit magnétique a un entrefer magnétique ; le système de vibration comprend une membrane, un élément élastique électriquement conducteur, un cadre, et une bobine mobile ; l'élément élastique électriquement conducteur comprend un premier bras fixe connecté au cadre de bassin, un second bras fixe espacé du premier bras fixe, un premier bras élastique connectant le premier bras fixe et le second bras fixe, et une plage de soudure s'étendant depuis le second bras fixe ; l'armature comprend un corps d'armature supporté par le second bras fixe et relié à la membrane et une paroi d'extension s'étendant de manière incurvée à partir du corps d'armature, la paroi d'extension s'étendant partiellement dans l'entrefer magnétique ; et la bobine mobile comprend un corps de bobine mobile fixé à la paroi d'extension et inséré dans l'entrefer magnétique et un fil de bobine mobile s'étendant de manière incurvée à partir du corps de bobine mobile dans la direction de la plage de soudure et relié électriquement à la plage de soudure, le fil de bobine mobile étant fixé à la paroi d'extension et s'étendant le long de la paroi d'extension jusqu'à la plage de soudure. Par rapport à l'art antérieur, le dispositif de production de son et le caisson de haut-parleur de la présente invention sont très fiables.
PCT/CN2019/129405 2019-12-27 2019-12-27 Dispositif de production de sons et son caisson de haut-parleur WO2021128334A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/129405 WO2021128334A1 (fr) 2019-12-27 2019-12-27 Dispositif de production de sons et son caisson de haut-parleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/129405 WO2021128334A1 (fr) 2019-12-27 2019-12-27 Dispositif de production de sons et son caisson de haut-parleur

Publications (1)

Publication Number Publication Date
WO2021128334A1 true WO2021128334A1 (fr) 2021-07-01

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PCT/CN2019/129405 WO2021128334A1 (fr) 2019-12-27 2019-12-27 Dispositif de production de sons et son caisson de haut-parleur

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080268793A1 (en) * 2007-04-26 2008-10-30 Motorola, Inc. Arrangement for variable bass reflex cavities
CN206350158U (zh) * 2016-12-19 2017-07-21 昆山联滔电子有限公司 扬声器
CN207251908U (zh) * 2017-08-22 2018-04-17 瑞声科技(新加坡)有限公司 扬声器和电子设备
CN207968942U (zh) * 2018-02-11 2018-10-12 瑞声科技(新加坡)有限公司 扬声器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080268793A1 (en) * 2007-04-26 2008-10-30 Motorola, Inc. Arrangement for variable bass reflex cavities
CN206350158U (zh) * 2016-12-19 2017-07-21 昆山联滔电子有限公司 扬声器
CN207251908U (zh) * 2017-08-22 2018-04-17 瑞声科技(新加坡)有限公司 扬声器和电子设备
CN207968942U (zh) * 2018-02-11 2018-10-12 瑞声科技(新加坡)有限公司 扬声器

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