WO2021128046A1 - Dispositif de production de son - Google Patents

Dispositif de production de son Download PDF

Info

Publication number
WO2021128046A1
WO2021128046A1 PCT/CN2019/128200 CN2019128200W WO2021128046A1 WO 2021128046 A1 WO2021128046 A1 WO 2021128046A1 CN 2019128200 W CN2019128200 W CN 2019128200W WO 2021128046 A1 WO2021128046 A1 WO 2021128046A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
circuit system
wall
bowl
magnetic bowl
Prior art date
Application number
PCT/CN2019/128200
Other languages
English (en)
Chinese (zh)
Inventor
严绪东
顾小江
邵涛
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/CN2019/128200 priority Critical patent/WO2021128046A1/fr
Publication of WO2021128046A1 publication Critical patent/WO2021128046A1/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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Definitions

  • the utility model relates to the field of electro-acoustic conversion, in particular to a sound-producing device applied to electronic sound box products.
  • the sound device is also known as a speaker or a horn, which is used in a speaker to convert audio signals into sound for playback.
  • the related art sound generating device includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system with a magnetic gap.
  • the magnetic circuit system drives the vibration system to vibrate and emit sound.
  • the vibration system includes a frame fixed to the basin. The frame is used for vibrating and sounding a diaphragm, a dome fixed to the diaphragm, a voice coil inserted in the magnetic gap, and a skeleton connecting the diaphragm and the voice coil.
  • the dome has a cone-shaped or planar structure, which results in insufficient strength of the dome, so that the frequency band of the sounding device is narrow and the sounding effect is not good.
  • the purpose of the utility model is to provide a sounding device with a wider frequency band and better high-frequency performance.
  • the present invention provides a sound generating device, which includes a basin frame, a vibration system supported on the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap ,
  • the vibration system includes:
  • the diaphragm includes a dome in the middle and a folding ring surrounding the dome and fixed to the basin frame.
  • the folding ring includes a connecting portion fixedly connected to the dome and surrounding the connection.
  • the folding ring part of the part and the fixing part extending from the periphery of the folding ring part and fixed to the basin frame;
  • the dome includes a main body part arranged directly opposite to the magnetic circuit system and spaced from the main body part.
  • the peripheral edge of the magnetic circuit system is bent away from the magnetic circuit system and extends toward the folding ring and is fixed to the surrounding wall on the side of the connecting part close to the magnetic circuit system.
  • the section of the main body part along the vibration direction is arc-shaped, so The projection of the main body along the vertical vibration direction completely falls on the surrounding wall;
  • the voice coil is inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound.
  • the connecting portion is a ring-shaped flat plate structure, and the main body portion is arched away from the magnetic circuit system.
  • the vibration system further includes a skeleton for fixedly connecting the voice coil and the diaphragm, one end of the skeleton extends into the magnetic gap and is connected to the voice coil, and the other end of the skeleton is connected to the voice coil.
  • the main body is connected to a side away from the diaphragm.
  • the magnetic circuit system includes a first magnetic bowl fixed to the basin frame, a magnetic steel unit accommodating and fixed in the first magnetic bowl, and a first relief slot penetrating the first magnetic bowl;
  • the first magnetic bowl includes a first magnetic bowl bottom wall supported and fixed to the basin frame, and a first magnetic bowl side wall bent and extended from the first magnetic bowl bottom wall in a direction close to the diaphragm,
  • the magnetic steel unit is fixed on the bottom wall of the first magnetic bowl and is spaced from the side wall of the first magnetic bowl to form the magnetic gap; The vibration direction of the diaphragm extends.
  • the basin frame includes a bottom wall at an intermediate position, an outer wall bent and extended from the periphery of the bottom wall, and an inner wall bent and extended from the bottom wall toward the diaphragm, the outer wall surrounding the inner wall Are arranged and spaced apart from each other, the inner wall is provided with a through opening extending therethrough, and the through opening extends along the vibration direction of the vibration system; the bottom wall and the inner wall jointly enclose an accommodating space, and the magnetic circuit system At least partly located in the accommodating space, and so that the first relief groove and the through opening are arranged one by one directly opposite to each other.
  • the magnetic circuit system further includes a second magnetic bowl covering the magnetic steel unit, and the second magnetic bowl is arranged directly opposite to the first magnetic bowl;
  • the second magnetic bowl includes a The bottom wall of the first magnetic bowl is spaced opposite to the bottom wall of the second magnetic bowl, a second relief groove penetrating the bottom wall of the second magnetic bowl along the vibration direction, and the bottom wall of the second magnetic bowl is approached
  • the bottom wall of the first magnetic bowl is bent and extended in the direction and abuts against the side wall of the second magnetic bowl of the side wall of the first magnetic bowl; the magnetic steel unit and the side wall of the first magnetic bowl and the second magnetic bowl
  • the side walls of the bowl are arranged at intervals and collectively enclose the magnetic gap.
  • the first relief groove also penetrates the side wall of the second magnetic bowl; the skeleton extends through the second relief groove to the magnetic gap.
  • the gap is connected to the side of the voice coil close to the diaphragm.
  • the vibration system further includes an elastic support assembly arranged around the magnetic circuit system and fixed to the basin frame, and the elastic support assembly sequentially extends through the opening and the first relief groove to the Inside the magnetic gap and connected with the voice coil.
  • the elastic support assembly includes an elastic member sleeved on the outer side of the magnetic circuit system and fixed to the basin frame, and an auxiliary diaphragm attached to the side of the elastic member away from the diaphragm;
  • the elastic member includes a body portion fixed to the basin frame and an extension wall extending from the body portion to the magnetic circuit system, the extension wall sequentially extending through the opening and the first relief groove to The magnetic gap is connected to the side of the voice coil away from the diaphragm.
  • the elastic member is a flexible circuit board electrically connected to the voice coil.
  • the connecting portion is provided with an opening penetrating the connecting portion along the vibration direction, and the dome is attached to the connecting portion and completely covers the opening.
  • the dome includes a main body portion that is arranged directly opposite to the magnetic circuit system and is spaced apart from the magnetic circuit system and faces the magnetic circuit system from the periphery of the main body.
  • the direction of the folding ring is bent and extended and fixed to the surrounding wall of the connecting part close to the magnetic circuit system, the cross section of the main body part along the vibration direction is arc-shaped, and the projection of the main body part along the vertical vibration direction is completely Landing on the surrounding wall; one end of the frame extends into the magnetic gap and is connected to the voice coil, and the other end of the frame is connected to the side of the main body away from the diaphragm.
  • Figure 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention.
  • Figure 2 is an exploded schematic diagram 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;
  • Fig. 4 is a schematic diagram of the three-dimensional structure of the diaphragm of the sound generating device of the present invention.
  • the present invention provides a sound generating device 100, which includes a basin frame 1, a vibration system 2 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 basin frame 1 includes a bottom wall 11 at an intermediate position, an outer wall 12 bent and extended from the periphery of the bottom wall 11, and an inner wall 13 bent and extended from the bottom wall 11 toward the vibration system 2.
  • the outer wall 11 are arranged around the inner wall 13 and spaced apart from each other, the inner wall 13 is provided with a through opening 131 extending therethrough, and the through opening 131 extends along the vibration direction of the vibration system 2;
  • the bottom wall 11 and the inner wall 13 jointly enclose an accommodating space 10, and the magnetic circuit system 3 is at least partially located in the accommodating space 10.
  • the vibration system 2 includes a diaphragm 21, a voice coil 22 and a skeleton 23.
  • the diaphragm 21 includes a dome 211 in the middle and a folding ring 212 surrounding the dome 211 and fixed to the basin frame 1.
  • the folding ring 212 includes a fixed connection to the dome 211.
  • the connecting portion 2121 and the folding ring portion 2122 surrounding the connecting portion 2121 extend from the periphery of the folding ring portion 2122 and are fixed to the fixing portion 2123 of the basin frame 1.
  • the dome 211 includes a main body 2111 that is arranged directly opposite to the magnetic circuit system 3 and is spaced apart from the magnetic circuit system 3, and is bent away from the magnetic circuit system 3 and toward the folding ring 212 from the periphery of the main body 2111.
  • the main body 2111 has an arc-shaped cross section along the vibration direction, and the projection of the main body 2111 along the vertical vibration direction is completely Fall on the surrounding wall 2112.
  • the voice coil 22 is inserted into the magnetic gap 30 to drive the diaphragm 21 to vibrate and produce sound.
  • One end of the frame 23 extends into the magnetic gap 30 and is connected to the voice coil 22, and the other end of the frame 23 is connected to the side of the main body 2111 away from the diaphragm 21.
  • the dome 211 includes a main body 2111 that is arranged directly opposite to the magnetic circuit system 3 and is spaced apart from the magnetic circuit system 3 and faces the folding ring 212 from the periphery of the main body 2111.
  • the main body 2111 extends in the direction of bending and is fixed to the surrounding wall 2112 on the side of the connecting part 2121 close to the magnetic circuit system 3.
  • the cross section of the main body 2111 along the vibration direction is arc-shaped.
  • the projection completely falls on the surrounding wall 2112; one end of the frame 23 extends into the magnetic gap 30 and is connected to the voice coil 22, and the other end of the frame 23 and the main body 2111 are away from the vibration One side of the membrane 21 is connected.
  • This structure greatly improves the strength of the vibration system 2 and expands the high frequency of the sound emitting device 100, thereby improving the high frequency performance of the sound emitting device 100.
  • the connecting portion 2121 has a ring-shaped flat plate structure, the main body 2111 is arched away from the magnetic circuit system 3, and the vertex of the main body 2111 along the vibration direction and the The surface of the connecting portion 2121 on the side away from the magnetic circuit system 3 has a level difference; the design of this structure further improves the acoustic performance of the sound emitting device 100.
  • the connecting portion 2121 has an opening 21211 penetrating therethrough in the vibration direction, and the dome 211 is attached to the connecting portion 2121 and completely covers the opening 21211.
  • This structure improves the rigidity of the connecting portion 2121, thereby further improving the high frequency performance of the sound emitting device 100.
  • the magnetic circuit system 3 includes a first magnetic bowl 31 fixed to the basin frame 1, a magnetic steel unit 32 accommodating and fixed in the first magnetic bowl 31, and a first relief slot penetrating the first magnetic bowl 33;
  • the first magnetic bowl 31 includes a first magnetic bowl bottom wall 311 that is supported and fixed to the basin frame 1, and a first magnetic bowl bottom wall 311 is bent and extended toward the direction of the diaphragm 21
  • the first magnetic bowl side wall 312, the magnetic steel unit 32 is fixed to the first magnetic bowl bottom wall 311 and is spaced from the first magnetic bowl side wall 312 to form the magnetic gap 30;
  • the groove 33 penetrates the side wall 312 of the first magnetic bowl and extends along the vibration direction of the diaphragm 21.
  • the magnetic circuit system 3 is installed in the accommodating space 10 so that the relief slot 33 and the through opening 131 are arranged one by one.
  • the magnetic circuit system 3 also includes a second magnetic bowl 34 covered by the magnetic steel unit 32, the second magnetic bowl 34 and the first magnetic bowl 31 are arranged directly opposite; the second magnetic bowl 34 It includes a second magnetic bowl bottom wall 341 that is spaced and opposite to the first magnetic bowl bottom wall 311, a second relief groove 342 penetrating the second magnetic bowl bottom wall 341 along the vibration direction, and The second magnetic bowl bottom wall 341 bends and extends toward the first magnetic bowl bottom wall 311 and abuts against the second magnetic bowl side wall 342 of the first magnetic bowl side wall 312; the magnetic steel unit 32 and The first magnetic bowl side wall 312 and the second magnetic bowl side wall 342 are arranged at intervals and jointly enclose the magnetic gap 30, and the first relief groove 33 also penetrates the second magnetic bowl side wall 342; The frame 23 passes through the second relief groove 342 and extends into the magnetic gap 30 to be connected to the side of the voice coil 22 close to the diaphragm 21.
  • the magnetic circuit system 3 includes a second magnetic bowl 34 covering the magnetic steel unit 32, and the second magnetic bowl 34 brings the magnetic steel unit 32 close to the diaphragm 21.
  • the magnetic field lines on one side are guided back into the magnetic gap 30, so that the magnetic field lines of the magnetic circuit system 3 are fully utilized, thereby effectively improving the sensitivity of the sound generating device.
  • the vibration system 2 also includes an elastic support assembly 24 arranged around the magnetic circuit system 3 and fixed to the basin frame 1.
  • the elastic support assembly 24 passes through the opening 131 and the first relief slot in sequence 33 extends into the magnetic gap 30 and is connected to the voice coil 22.
  • the elastic support assembly 24 includes an elastic member 241 sleeved on the outside of the magnetic circuit system 3 and fixed to the basin frame 1, and an elastic member 241 attached to the elastic member 241 away from the diaphragm.
  • the through opening 131 and the first relief groove 33 extend into the magnetic gap 30 and are connected to the side of the voice coil 22 away from the diaphragm 21.
  • the elastic member 241 is a flexible circuit board electrically connected to the voice coil 22.
  • the dome includes a main body portion that is arranged directly opposite to the magnetic circuit system and is spaced apart from the magnetic circuit system and faces the magnetic circuit system from the periphery of the main body.
  • the direction of the folding ring is bent and extended and fixed to the surrounding wall of the connecting part close to the magnetic circuit system, the cross section of the main body part along the vibration direction is arc-shaped, and the projection of the main body part along the vertical vibration direction is completely Landing on the surrounding wall; one end of the frame extends into the magnetic gap and is connected to the voice coil, and the other end of the frame is connected to the side of the main body away from the diaphragm.

Landscapes

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

Abstract

La présente invention concerne un dispositif de production de son, comprenant une enceinte, un système de vibration et un système de circuit magnétique. Le système de circuit magnétique est pourvu d'un entrefer magnétique. Le système de vibration comprend une membrane vibrante, une bobine acoustique et un croisillon. La membrane vibrante comprend un dôme situé au milieu, et une bague de pliage qui entoure le dôme et est fixée à l'enceinte. La bague de pliage comprend une partie de raccordement reliée de manière fixe au dôme, une partie bague de pliage entourant la partie de raccordement, et une partie de fixation s'étendant à partir de la périphérie de la partie bague de pliage et fixée à l'enceinte. Le dôme comprend une partie corps principal agencée directement en regard du système de circuit magnétique à un intervalle, et une paroi environnante, qui est pliée pour s'étendre à partir de la périphérie de la partie corps principal dans une direction s'éloignant du système de circuit magnétique et vers la bague de pliage, et est fixée à un côté de la partie de raccordement qui est proche du système de circuit magnétique. La section transversale, dans une direction de vibration, de la partie corps principal est en forme d'arc, et une saillie, dans une direction de vibration verticale, de la partie corps principal se trouve complètement sur la paroi environnante. La bobine acoustique est insérée dans l'entrefer magnétique pour entraîner la membrane vibrante pour vibrer et produire un son. Par rapport à la technologie associée, le dispositif de production de son a une bande de fréquence plus large et a une meilleure performance à haute fréquence.
PCT/CN2019/128200 2019-12-25 2019-12-25 Dispositif de production de son WO2021128046A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/128200 WO2021128046A1 (fr) 2019-12-25 2019-12-25 Dispositif de production de son

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/128200 WO2021128046A1 (fr) 2019-12-25 2019-12-25 Dispositif de production de son

Publications (1)

Publication Number Publication Date
WO2021128046A1 true WO2021128046A1 (fr) 2021-07-01

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PCT/CN2019/128200 WO2021128046A1 (fr) 2019-12-25 2019-12-25 Dispositif de production de son

Country Status (1)

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WO (1) WO2021128046A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090324000A1 (en) * 2000-01-19 2009-12-31 Harman International Industries, Incorporated Speaker surround structure for maximizing cone diameter
CN204465856U (zh) * 2015-03-10 2015-07-08 加一联创电子科技有限公司 振膜及使用该振膜的动铁单元
CN106817663A (zh) * 2015-12-01 2017-06-09 富葵精密组件(深圳)有限公司 振膜及其制备方法、声音模组及电子装置
CN208638582U (zh) * 2018-08-13 2019-03-22 瑞声科技(新加坡)有限公司 振膜及发声器件
CN209201320U (zh) * 2018-08-13 2019-08-02 瑞声科技(新加坡)有限公司 振膜及发声器件
CN209526870U (zh) * 2018-12-29 2019-10-22 瑞声科技(新加坡)有限公司 扬声器和耳机
CN209526840U (zh) * 2018-12-29 2019-10-22 瑞声科技(新加坡)有限公司 扬声器和耳机

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090324000A1 (en) * 2000-01-19 2009-12-31 Harman International Industries, Incorporated Speaker surround structure for maximizing cone diameter
CN204465856U (zh) * 2015-03-10 2015-07-08 加一联创电子科技有限公司 振膜及使用该振膜的动铁单元
CN106817663A (zh) * 2015-12-01 2017-06-09 富葵精密组件(深圳)有限公司 振膜及其制备方法、声音模组及电子装置
CN208638582U (zh) * 2018-08-13 2019-03-22 瑞声科技(新加坡)有限公司 振膜及发声器件
CN209201320U (zh) * 2018-08-13 2019-08-02 瑞声科技(新加坡)有限公司 振膜及发声器件
CN209526870U (zh) * 2018-12-29 2019-10-22 瑞声科技(新加坡)有限公司 扬声器和耳机
CN209526840U (zh) * 2018-12-29 2019-10-22 瑞声科技(新加坡)有限公司 扬声器和耳机

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