WO2021114210A1 - Dispositif de production de son - Google Patents

Dispositif de production de son Download PDF

Info

Publication number
WO2021114210A1
WO2021114210A1 PCT/CN2019/125074 CN2019125074W WO2021114210A1 WO 2021114210 A1 WO2021114210 A1 WO 2021114210A1 CN 2019125074 W CN2019125074 W CN 2019125074W WO 2021114210 A1 WO2021114210 A1 WO 2021114210A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic steel
positioning
yoke
auxiliary
fixed
Prior art date
Application number
PCT/CN2019/125074
Other languages
English (en)
Chinese (zh)
Inventor
宋威
张帆
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/CN2019/125074 priority Critical patent/WO2021114210A1/fr
Publication of WO2021114210A1 publication Critical patent/WO2021114210A1/fr

Links

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
    • H04R9/06—Loudspeakers

Definitions

  • the invention relates to the field of electro-acoustic conversion, in particular to a sound-producing device used in portable electronic 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 magnetic circuit system includes a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, and a secondary magnetic steel ringed on the main magnetic steel and separated from the main magnetic steel to form the magnetic gap.
  • the magnetic circuit system and the basin frame part are normally positioned by matching the features provided by the yoke and the basin frame, such as the magnetic
  • the yoke is provided with a positioning column
  • the basin frame is provided with a positioning hole
  • the positioning column is inserted into the positioning hole to form a fixation so that the magnetic circuit system and the basin frame match and limit the position.
  • this structure requires the main magnet and the auxiliary magnet to form a concession space, which limits the reduction in the volume of the magnetic circuit system, thereby improving the acoustic performance of the sound generating device. Restricted.
  • the purpose of the present invention is to overcome the above technical problem and provide a sound device with good acoustic performance.
  • the present invention provides a sound generating device, which includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound;
  • the basin frame is used to vibrate and sound the diaphragm.
  • the magnetic circuit system includes a main magnet and an auxiliary magnet arranged at intervals to form a magnetic gap, and a yoke fixed to the main magnet and the auxiliary magnet at the same time.
  • the auxiliary magnet The steel is arranged around the circumference of the main magnetic steel, and the auxiliary magnetic steel includes a secondary magnetic steel body fixed to the yoke and a positioning portion protruding and extending from the secondary magnetic steel body toward the diaphragm, so The positioning part is fixed to the basin frame.
  • the secondary magnetic steel body has a rectangular shape, and the positioning portions include two and are respectively located on opposite sides of the long axis of the secondary magnetic steel body.
  • the magnetic circuit system further includes a secondary pole plate arranged on the side of the secondary magnetic steel away from the yoke, and the secondary pole plate is provided along the vibration direction of the vibration system and penetrates through it and is connected to the secondary pole plate.
  • the positioning groove is matched with the positioning part, and the positioning part passes through the positioning groove and is fixed to the basin frame.
  • the positioning portion includes a plurality of positioning portions distributed symmetrically, and the positioning groove includes a plurality of positioning portions, and each positioning portion passes through a corresponding positioning groove.
  • the secondary magnetic steel body has a rectangular shape, and the positioning portions include two and are respectively located on opposite sides of the long axis of the secondary magnetic steel body.
  • the secondary magnetic steel body includes a first body along the long axis direction and a second body along the short axis direction.
  • the surface of the first body away from the main magnetic steel is aligned with the edge of the yoke along the vibration direction. Flush.
  • the basin frame is rectangular
  • the secondary pole plate further includes a secondary pole plate body covered and fixed to the secondary magnetic steel body, and the secondary pole plate body faces the basin frame from opposite ends of the secondary pole plate body.
  • the two short axis sides of the two sides extend two fixed parts, the fixed parts are fixed to the basin frame, and the positioning groove is provided in the secondary pole plate body.
  • the secondary electrode plate further includes an escape hole formed at a distance between the fixing portion and the secondary electrode plate body
  • the vibration system further includes an auxiliary diaphragm arranged at a distance from the diaphragm, and the auxiliary diaphragm Fixed to the side of the basin frame close to the yoke, the auxiliary diaphragm includes two opposite sides of the main magnetic steel short axis, and the two auxiliary diaphragms are in front of the escape hole. Pair set.
  • the yoke includes a yoke body and an escape portion formed by recessing opposite sides of the yoke body in a direction away from the basin frame, and both the main magnet and the auxiliary magnet are fixed to the In the yoke body, the avoiding portion is arranged directly opposite to the auxiliary diaphragm in the vibration direction of the auxiliary diaphragm.
  • the surface of the positioning portion on the side away from the yoke is flush with the surface of the secondary pole plate on the side away from the yoke.
  • the sound generating device of the present invention provides the auxiliary magnetic steel body and the positioning part on the auxiliary magnetic steel, and the positioning part is separated from the magnetic yoke by the auxiliary magnetic steel body.
  • the side protrudes and extends, and fixes the positioning portion to the basin frame, thereby realizing the limiting positioning of the magnetic circuit system and the basin frame.
  • This structure does not use the yoke, so there is no need to adjust the magnetic gap volume of the main magnet, the auxiliary magnet, and the main magnet and the auxiliary magnet, so that the magnetic circuit can be maximized , So that the acoustic performance of the sound device is good.
  • Figure 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention.
  • FIG. 2 is an exploded schematic diagram 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 part B shown in Figure 3;
  • FIG. 5 is a schematic diagram of the assembly structure of the magnetic circuit system of the sound device of the present invention.
  • FIG. 6 is an exploded schematic view of a part of the three-dimensional structure of the magnetic circuit system of the sound generating device of the present invention.
  • FIG. 7 is a schematic diagram of the three-dimensional structure of the secondary magnetic steel of the magnetic circuit system in the sound generating device according to another embodiment of the present invention.
  • the sound generating device 100 provided by the present invention includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3.
  • the basin frame 1 is used to support the vibration system 2 and the magnetic circuit system 3, and in this embodiment, the basin frame 1 is rectangular.
  • the magnetic circuit system 3 has a magnetic gap 30, and the magnetic circuit system 3 is used to drive the vibration system 2 to vibrate and produce sound.
  • the vibration system 2 includes a diaphragm 21 fixed to the basin frame 1, a voice coil 22 inserted in the magnetic gap 30 and driving the diaphragm 21 to vibrate and produce sound, fixed to the basin frame 1 and connected to the Auxiliary diaphragms 23 that are opposed to and spaced apart from the diaphragm 21 and a skeleton 24 connecting the auxiliary diaphragm 23 and the diaphragm 21.
  • One end of the auxiliary diaphragm 23 is fixed to the basin frame 1, and the other end of the auxiliary diaphragm 23 is supported and fixed to the frame 24.
  • the diaphragm 21 is used for vibration and sound. Specifically, the diaphragm 21 includes a vibration portion 211, a folding ring portion 212 extending from the periphery of the vibration portion 211, and a side of the folding ring portion 212 away from the vibration portion 211 is bent outward.
  • the fixing portion 213 is fixed to the basin frame 1, and the folding ring portion 212 has an arc structure that is recessed in a direction away from the magnetic circuit system 3.
  • the voice coil 22 has a rectangular structure with rounded corners.
  • the auxiliary diaphragm 23 and the diaphragm 21 are spaced apart.
  • the auxiliary diaphragm 23 includes two and is respectively disposed on opposite sides of the voice coil 22.
  • the frame 24 connects the auxiliary diaphragm 23 with the diaphragm 21. More preferably, the frame 24 connects the auxiliary diaphragm 23 with the voice coil 22. Further, the frame 24 connects the auxiliary diaphragm 23 with the voice coil 22. The voice coil 22 is connected to the diaphragm 21.
  • the skeleton 24 realizes the connection of the auxiliary diaphragm 23 and the diaphragm 21, supports the diaphragm 21 to provide greater elasticity, and improves the acoustic performance; and the skeleton 24 also realizes the connection between the auxiliary diaphragm 23 and the sound
  • the top end of the coil 22 is connected to improve the vibration stability.
  • the frame 24 realizes the connection of the voice coil 22 and the diaphragm 21 to realize the voice coil 22 driving the vibration 21 to vibrate.
  • the magnetic circuit system 3 includes a magnetic yoke 31, a main magnetic steel 32 fixed to the magnetic yoke 31, and a secondary magnetic steel 33 that surrounds the main magnetic steel 32 and is spaced from the main magnetic steel 32 to form a magnetic gap 30 And a secondary pole plate 34 covering the side of the secondary magnet 33 away from the yoke 31.
  • the yoke 31 can be used to conduct magnetism and improve driving force.
  • the yoke 31 is used to fix the main magnet 32 and the auxiliary magnet 33.
  • the yoke 31 includes a yoke body 311 and an escape portion 312 formed by recessing opposite sides of the yoke body 311 in a direction away from the basin frame 1.
  • the main magnet 32 and the auxiliary magnet The steel 33 is fixed to the yoke body 311.
  • the auxiliary diaphragm 23 is fixed on the side of the basin frame 1 close to the yoke 31.
  • the relief portion 312 is arranged directly opposite to the auxiliary diaphragm 23 along the vibration direction of the auxiliary diaphragm 23.
  • the main magnet 32 and the auxiliary magnet 33 are fixed to the yoke 31 and form the magnetic gap 30 at intervals.
  • the two auxiliary diaphragms 23 are respectively arranged on opposite sides of the short axis of the main magnet 32.
  • the magnetic circuit system 3 further includes a main pole plate 35 fixed on the side of the main magnet 32 away from the yoke 31.
  • the main pole plate 35 can be used to conduct magnetism and improve driving force.
  • the secondary magnet 33 is arranged around the circumference of the main magnet 32.
  • the sub-magnet 33 includes a sub-magnet body 331 fixed to the yoke 31 and a positioning portion 332.
  • the secondary magnetic steel body is rectangular.
  • the secondary magnet body 331 has a ring shape and surrounds the magnetic gap 30 with the main magnet 32. More preferably, the orthographic projection of the main magnet 32 toward the secondary magnet body 331 along its short axis or long axis direction falls within the scope of the secondary magnet body 331. In other words, the secondary magnet body 331 is longer than the length of the main magnet 32 in its short axis or long axis direction, so as to maximize the space of the magnetic gap 30, which is beneficial to improve the sound The driving force of the ring 22.
  • the secondary magnetic steel body 331 includes a first body 331a along the long axis direction and a second body 331b along the short axis direction.
  • the surface of the first body 331a away from the main magnet 32 is flush with the edge of the yoke 31 in the vibration direction.
  • the width of the secondary magnet body 331 in the minor axis direction is the same as the width of the basin frame 1 in the minor axis direction.
  • the two opposite sides of the minor axis of the auxiliary magnetic steel body 331 respectively extend to an end of the adjacent auxiliary diaphragm 23 away from the basin frame 1.
  • the positioning portion 332 is formed by protruding and extending the secondary magnetic steel body 331 toward the diaphragm 21. That is to say, the positioning portion 332 protrudes and extends in the direction of the basin frame 1.
  • the positioning part is fixed to the basin frame.
  • the positioning portion 332 is used for limiting and positioning the magnetic circuit system 3 and the basin frame.
  • the secondary plate 34 is fixed to the basin frame 1.
  • the secondary pole plate 34 can be used to conduct magnetism and improve the driving force.
  • the secondary electrode plate 34 includes a secondary electrode plate body 341, two fixing portions 342, a positioning groove 340 and an escape hole 343.
  • the secondary pole plate body 341 is covered and fixed to the secondary magnetic steel body 331.
  • the surface of the positioning portion 332 away from the yoke 31 is flush with the surface of the secondary pole plate 34 away from the yoke 31.
  • the positioning portion 332 and the secondary pole plate body 341 are both flush on the surface away from the yoke 31. This structure facilitates the assembly of the magnetic circuit system and the basin frame.
  • the two fixing portions 342 are formed by extending opposite ends of the secondary plate body 341 to the two short axis sides of the basin frame 1 respectively.
  • the fixing portion 342 is fixed to the basin frame 1.
  • the fixing portion 342 is used to fix the magnetic circuit system 3 to the basin frame 1.
  • the structure of the fixing portion 342 does not affect the structure of the secondary pole plate body 341 and the secondary magnetic steel body 331, which can maximize the magnetic circuit system 3, effectively increase the driving force, and improve the sound performance .
  • the positioning groove 340 is formed through the secondary electrode plate 34 along the vibration direction of the vibration system 2. Specifically, the positioning groove 340 is provided in the secondary plate body 341. Wherein, the positioning groove 340 matches the positioning portion 332. That is, the shape of the positioning groove 340 matches the shape of the positioning portion 332. The positioning portion 332 passes through the positioning groove 340 and is fixed to the basin frame. This structure does not use the yoke 31, so there is no need to adjust the main magnet 32 and the auxiliary magnet 33, so that the magnetic gap 30 can be maximized, so that the magnetic circuit can be maximized. , So that the acoustic performance of the sound device is good.
  • the avoiding hole 343 is formed at an interval between the fixing portion 342 and the secondary plate body 341.
  • the two auxiliary diaphragms 23 and the avoiding holes 343 are arranged directly opposite to each other.
  • the positioning portion 332 includes a plurality of positioning portions 332 distributed symmetrically, and the positioning groove 340 includes a plurality of positioning portions 332 passing through a corresponding one of the positioning portions 332. Locating slot 340.
  • the multiple positioning grooves 340 cooperate with the positioning grooves 340 for positioning, which can make the positioning of the magnetic circuit system 3 and the basin frame 1 more accurate.
  • the positioning portion 332 includes two positioning portions 332 which are respectively located on opposite sides of the long axis of the secondary magnetic steel body 331. There are two positioning grooves 340, and each positioning portion 332 passes through a corresponding positioning groove 340.
  • the secondary magnet 33 has a rectangular shape, which includes two short-axis sides and two long-axis sides arranged in parallel, and each of the positioning portions 332 is arranged on one of the long-axis sides.
  • the symmetrically distributed structure of the two positioning portions 332 can not only realize positioning, but also make the positioning structure simple and easy to assemble and manufacture.
  • the positioning portion 332 may also be provided on opposite sides of the minor axis of the secondary magnetic steel body 331.
  • the structure may be that the positioning portion 332 includes two positioning portions 332 located on opposite sides of the minor axis of the secondary magnetic steel body 331 respectively. There are two positioning grooves 340, and each positioning portion 332 passes through a corresponding positioning groove 340.
  • the positioning portion 332 is made by a powder metallurgy process or a die-casting molding process. Of course, it is not limited to this, and other processes are also possible to make the positioning portion 332. For example, the positioning portion 332 is made first, and then glued and fixed to the secondary magnetic steel body 331.
  • the sound generating device of the present invention provides the auxiliary magnetic steel body and the positioning part on the auxiliary magnetic steel, and the positioning part is separated from the magnetic yoke by the auxiliary magnetic steel body.
  • the side protrudes and extends, and fixes the positioning portion to the basin frame, thereby realizing the limiting positioning of the magnetic circuit system and the basin frame.
  • This structure does not use the yoke, so there is no need to adjust the magnetic gap volume of the main magnet, the auxiliary magnet, and the main magnet and the auxiliary magnet, so that the magnetic circuit can be maximized , So that the acoustic performance of the sound device is good.

Landscapes

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

Abstract

Est divulgué ici un dispositif de production de son, comprenant un cadre de panier, et un système de vibration et un système de circuit magnétique fixés séparément au cadre de panier, le système de circuit magnétique étant utilisé pour entraîner le système de vibration à vibrer afin de produire un son, le système de vibration comprenant un diaphragme vibrant fixé au cadre de panier et utilisé pour vibrer afin de produire un son ; le système de circuit magnétique comprend de l'acier magnétique principal et de l'acier magnétique auxiliaire agencés à des intervalles afin de former un entrefer magnétique, et une culasse d'aimant fixée à la fois à l'acier magnétique principal et à l'acier magnétique auxiliaire ; l'acier magnétique auxiliaire est agencé sur la périphérie de l'acier magnétique principal de manière enveloppante ; l'acier magnétique auxiliaire comprend un corps en acier magnétique auxiliaire fixé à la culasse d'aimant, et une partie de positionnement faisant saillie et s'étendant à partir du corps en acier magnétique auxiliaire vers le diaphragme vibrant ; et la partie de positionnement est fixée au cadre de panier. Par rapport à l'état de la technique, le dispositif de production de son de la présente invention présente d'excellentes performances acoustiques.
PCT/CN2019/125074 2019-12-13 2019-12-13 Dispositif de production de son WO2021114210A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/125074 WO2021114210A1 (fr) 2019-12-13 2019-12-13 Dispositif de production de son

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/125074 WO2021114210A1 (fr) 2019-12-13 2019-12-13 Dispositif de production de son

Publications (1)

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WO2021114210A1 true WO2021114210A1 (fr) 2021-06-17

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PCT/CN2019/125074 WO2021114210A1 (fr) 2019-12-13 2019-12-13 Dispositif de production de son

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024130812A1 (fr) * 2022-12-22 2024-06-27 瑞声光电科技(常州)有限公司 Dispositif d'émission sonore

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202551325U (zh) * 2011-12-30 2012-11-21 瑞声光电科技(常州)有限公司 扬声器
CN204539459U (zh) * 2014-12-25 2015-08-05 歌尔声学股份有限公司 微型扬声器
US20170347199A1 (en) * 2016-05-26 2017-11-30 AAC Technologies Pte. Ltd. Speaker
CN208015991U (zh) * 2018-01-05 2018-10-26 奥音科技（北京）有限公司 双顶片边磁体结构、磁路系统及扬声器
CN110166902A (zh) * 2019-05-09 2019-08-23 瑞声光电科技(常州)有限公司 发声器件
CN209314078U (zh) * 2019-01-08 2019-08-27 深圳市信维声学科技有限公司 一种扬声器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202551325U (zh) * 2011-12-30 2012-11-21 瑞声光电科技(常州)有限公司 扬声器
CN204539459U (zh) * 2014-12-25 2015-08-05 歌尔声学股份有限公司 微型扬声器
US20170347199A1 (en) * 2016-05-26 2017-11-30 AAC Technologies Pte. Ltd. Speaker
CN208015991U (zh) * 2018-01-05 2018-10-26 奥音科技（北京）有限公司 双顶片边磁体结构、磁路系统及扬声器
CN209314078U (zh) * 2019-01-08 2019-08-27 深圳市信维声学科技有限公司 一种扬声器
CN110166902A (zh) * 2019-05-09 2019-08-23 瑞声光电科技(常州)有限公司 发声器件

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024130812A1 (fr) * 2022-12-22 2024-06-27 瑞声光电科技(常州)有限公司 Dispositif d'émission sonore

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