WO2021097955A1 - Dispositif sonore - Google Patents

Dispositif sonore Download PDF

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Publication number
WO2021097955A1
WO2021097955A1 PCT/CN2019/123900 CN2019123900W WO2021097955A1 WO 2021097955 A1 WO2021097955 A1 WO 2021097955A1 CN 2019123900 W CN2019123900 W CN 2019123900W WO 2021097955 A1 WO2021097955 A1 WO 2021097955A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
wall
magnetic bowl
bowl
side wall
Prior art date
Application number
PCT/CN2019/123900
Other languages
English (en)
Chinese (zh)
Inventor
宋威
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
Publication of WO2021097955A1 publication Critical patent/WO2021097955A1/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
    • H04R9/02—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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • 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
    • H04R9/045—Mounting
    • 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 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 to vibrate the diaphragm, the dome attached to the diaphragm, and the voice coil connected to the dome of the diaphragm and inserted in the magnetic gap; the magnetic circuit system is completely housed in the place
  • the inner part of the basin frame is arranged directly opposite to the diaphragm along the vibration direction.
  • the magnetic circuit system and the vibration system are distributed up and down along the vibration direction, so that the space utilization rate of the sounding device along the vibration direction is low, which limits the thickness design of the sounding device.
  • the purpose of the present invention is to provide a sound device with high space utilization rate and small product thickness.
  • 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 for driving the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap;
  • the magnetic circuit system includes a magnetic bowl fixed to the basin frame and a magnetic steel unit fixed to the magnetic bowl; the magnetic bowl includes a bottom wall for fixing the magnetic steel unit and a distance from the magnetic steel unit Arranging and forming the side wall of the magnetic gap;
  • the vibration system includes:
  • a diaphragm comprising a first fixing part fixed to the basin frame, a second fixing part fixed to the side wall, and a vibrating part connecting the first fixing part and the second fixing part;
  • a voice coil support the voice coil support is fixed to the vibrating part;
  • a voice coil the voice coil is inserted into the magnetic gap through the voice coil bracket to drive the vibrating part to vibrate and produce sound;
  • the vertical distance between the vibration part at the position of maximum amplitude and the surface of the bottom wall away from the magnetic steel unit is less than or equal to the height of the magnetic bowl along the vibration direction.
  • the magnetic bowl includes:
  • the first magnetic bowl includes a first magnetic bowl bottom wall fixed to the basin frame to serve as the bottom wall, and the first magnetic bowl bottom wall is bent in a direction approaching the diaphragm Fold the extended side wall of the first magnetic bowl;
  • a second magnetic bowl the second magnetic bowl includes a second magnetic bowl bottom wall that is directly opposite to and spaced apart from the first magnetic bowl bottom wall, and is close to the first magnetic bowl from the second magnetic bowl bottom wall
  • the second magnetic bowl side wall bent and extended in the direction of the bowl side wall;
  • the first magnetic bowl is fixedly supported on the basin frame, the magnetic steel unit is fixed on the bottom wall of the first magnetic bowl, and the second magnetic bowl bottom wall is covered on the magnetic steel unit away from the first magnetic steel unit.
  • One end of the bottom wall of a magnetic bowl, the magnetic steel unit, the first magnetic bowl side wall and the second magnetic bowl side wall jointly form the magnetic gap, and the second fixing portion is fixed to the second magnetic bowl.
  • the side wall of the bowl is fixedly supported on the basin frame, the magnetic steel unit is fixed on the bottom wall of the first magnetic bowl, and the second magnetic bowl bottom wall is covered on the magnetic steel unit away from the first magnetic steel unit.
  • the side wall is provided with a relief groove passing through it and matched with the voice coil support, and the relief groove extends along the vibration direction and penetrates the first magnetic bowl side wall and the The side wall of the second magnetic bowl is provided; the voice coil support extends into the magnetic gap through the relief groove and is connected with the voice coil.
  • the basin frame includes a bottom plate and an outer wall bent and extended from the periphery of the bottom plate, the bottom wall is fixedly supported on the bottom plate, and the first fixing portion is fixed to the outer wall.
  • the basin frame further includes an inner wall bent and extended from the bottom plate, the outer wall is arranged around the inner wall and spaced apart from each other, and the bottom plate and the inner wall jointly enclose a containing space;
  • the second fixing portion is fixedly supported on the inner wall, the magnetic circuit system is fixedly housed in the containing space, and the side wall of the first magnetic bowl is abutted and fixed to the inner wall;
  • the inner wall is provided with a through opening extending therethrough, the through opening extends along the vibration direction of the diaphragm, and the voice coil support extends into the magnetic gap through the through opening and the relief groove in turn .
  • the inner wall protrudes and extends to form a first fixing protrusion and a second fixing protrusion
  • the side wall of the first magnetic bowl abuts and is fixed to the first fixing protrusion
  • the side wall of the second magnetic bowl Abutting and fixing to the second fixing protrusion.
  • 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 for driving the vibration system to vibrate and produce sound.
  • the magnetic circuit system has a magnetic gap;
  • the basin frame includes a bottom plate An outer wall bent and extended from the periphery of the bottom plate and an inner wall bent and extended from the bottom plate; the outer wall is arranged around the inner wall and is spaced apart from each other, and the bottom plate and the inner wall jointly enclose a containing space;
  • the magnetic circuit system includes a magnetic bowl fixed to the basin frame and a magnetic steel unit fixed to the magnetic bowl; the magnetic bowl includes a bottom wall for fixing the magnetic steel unit and the magnetic steel unit Are arranged at intervals and form side walls of the magnetic gap;
  • the vibration system includes:
  • a diaphragm including a first fixing portion fixed to the outer wall, a second fixing portion fixed to the inner wall, and a vibrating portion connecting the first fixing portion and the second fixing portion;
  • a voice coil support the voice coil support is fixed to the vibrating part;
  • a voice coil the voice coil is inserted into the magnetic gap through the voice coil bracket to drive the vibrating part to vibrate and produce sound;
  • the magnetic circuit system is installed in the accommodating space, and the vertical distance between the vibration part at the position of maximum amplitude and the surface of the bottom wall away from the magnetic steel unit is less than or equal to the height of the magnetic bowl in the vibration direction .
  • the magnetic bowl includes:
  • the first magnetic bowl includes a first magnetic bowl bottom wall fixed to the basin frame to serve as the bottom wall, and the first magnetic bowl bottom wall is bent in a direction approaching the diaphragm Fold the extended side wall of the first magnetic bowl;
  • a second magnetic bowl the second magnetic bowl includes a second magnetic bowl bottom wall that is directly opposite to and spaced apart from the first magnetic bowl bottom wall, and is close to the first magnetic bowl from the second magnetic bowl bottom wall
  • the second magnetic bowl side wall bent and extended in the direction of the bowl side wall;
  • the side wall of the first magnetic bowl abuts and is fixed to the inner wall
  • the magnetic steel unit is fixed to the bottom wall of the first magnetic bowl
  • the bottom wall of the second magnetic bowl is covered on the magnetic steel unit away from the inner wall.
  • the magnetic steel unit, the side wall of the first magnetic bowl and the side wall of the second magnetic bowl jointly form the magnetic gap
  • the second fixing portion is fixed to the first magnetic bowl.
  • the inner wall protrudes and extends to form a first fixing protrusion and a second fixing protrusion
  • the side wall of the first magnetic bowl abuts and is fixed to the first fixing protrusion
  • the side wall of the second magnetic bowl Abutting and fixing to the second fixing protrusion.
  • the side wall is provided with a relief groove passing through it and matched with the voice coil support, and the relief groove extends along the vibration direction and penetrates the first magnetic bowl side wall and the The side wall of the second magnetic bowl is provided; the voice coil support extends into the magnetic gap through the relief groove and is connected with the voice coil.
  • the inner wall is provided with a through opening extending therethrough, the through opening extends along the vibration direction of the diaphragm, and the voice coil support extends through the through opening and the relief groove to the Within the magnetic gap.
  • the diaphragm includes a first fixing part fixed to the basin frame, a second fixing part fixed to the side wall and/or inner wall, and connecting the first fixing part and the second fixing part.
  • the vibration part, and the vertical distance between the vibration part at the position of maximum amplitude and the surface of the bottom wall away from the magnetic steel unit is less than or equal to the height of the magnetic bowl along the vibration direction.
  • FIG. 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention
  • Figure 2 is an exploded view of a part of the three-dimensional structure of the sound generating device of the present invention
  • FIG. 3 is a schematic diagram of the three-dimensional structure of the voice coil support of the sound generating device of the present invention.
  • FIG. 4 is an exploded schematic diagram of the three-dimensional structure of the basin frame and the magnetic circuit system of the sound generating device of the present invention
  • Fig. 5 is an exploded schematic view of the three-dimensional structure of the basin frame and the magnetic circuit system of the sound device of the present invention from another angle;
  • Figure 6 is a cross-sectional view taken along line A-A in Figure 1;
  • Fig. 7 is a schematic cross-sectional view of another embodiment of the sound generating device of the present invention.
  • Fig. 8 is an enlarged schematic diagram of the part shown in B in Fig. 7.
  • 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 with a magnetic gap 30.
  • the vibration system 2 and the magnetic circuit system 3 are respectively supported on the basin frame 1, and the magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.
  • the basin frame 1 includes a bottom plate 11, an outer wall 12 bent and extended from the periphery of the bottom plate 11, and an inner wall 13 bent and extended from the bottom plate 11.
  • the outer walls 12 are arranged around the inner wall 13 and are spaced apart from each other.
  • the inner wall 13 is provided with a through opening 131 penetrating therethrough, and the through opening 131 extends along the vibration direction of the vibration system 2; the bottom plate 11 and the inner wall 13 jointly enclose the accommodating space 10.
  • the vibration system 2 includes a diaphragm 21, a voice coil support 22, a voice coil 23 and an auxiliary diaphragm 24.
  • the diaphragm 21 includes a vibrating portion 211, a folding ring portion 212 extending from the periphery of the vibrating portion 211, and a fixing portion 213 bending and extending from the folding ring portion 212 and fixed to the basin frame 1.
  • the vibrating part 211 is used to radiate sound waves to generate sound when vibrating.
  • the vibration part 211 has a ring shape.
  • the folding ring portion 212 is used for improving elastic support and amplitude when the vibration portion 211 vibrates, and includes a first folding ring portion 2121 and a second folding ring portion 2122 that are respectively bent and extended from opposite sides of the vibration portion 211 and formed a ring shape.
  • the first folding ring portion 2121 is arranged around the second folding ring portion 2122 and is spaced apart from each other.
  • the fixing portion 213 is used to fix the diaphragm 21 to the basin frame 1, and includes a first fixing portion 2131 bent and extending from the first folding ring portion 2121 away from the vibrating portion 211, and a second folding ring portion 2122 away from the vibrating portion
  • the second fixing portion 2132 is bent and extended on the side 211, the first fixing portion 2131 and the second fixing portion 2132 are both ring-shaped; the first fixing portion 2131 is fixed to the outer wall 12, and the second fixing portion 2132 is fixed to the magnetic circuit system 3.
  • the second fixing portion 2132 is provided with a relief hole 2130 passing through it, and the relief hole 2130 is provided corresponding to the magnetic circuit system 3.
  • One end of the voice coil support 22 is attached and fixed to the vibrating part 211, and the other end extends into the magnetic gap 30 through the opening 131 and is fixedly connected to the voice coil 23.
  • the voice coil support 22 includes a flat wall 221 and an extension wall 222.
  • the flat wall 221 is attached to the side of the vibrating part 211 close to the magnetic circuit system 3 to serve as the dome structure of the diaphragm 21.
  • the extension wall 222 is bent and extended from the flat wall 221 in a direction away from the diaphragm 21 for contact with
  • the voice coil 23 is connected and supports the voice coil 23.
  • the flat wall 221 has a ring shape.
  • the vibrating portion 211 is provided with a through hole 2111 penetrating therethrough, and the flat wall 221 completely covers the through hole 2111.
  • the flat wall 221 is a rigid material, which is beneficial to improve the high-frequency acoustic performance of the sound emitting device 100.
  • the arrangement of the through hole 2111 can reduce the thickness of the diaphragm 21 to a certain extent, which is effective The vibration space of the vibration part 211 is increased.
  • the voice coil 23 is inserted in the magnetic gap 30 and fixedly connected to the extension wall 222, that is, the voice coil 23 drives the extension wall 222 to vibrate through the voice coil support 22 to drive the flat wall 221 to vibrate, thereby driving the vibrating portion 211 to vibrate and produce sound.
  • the flat wall 221 of the voice coil holder 22 serves as the top ball structure of the diaphragm 21, the sound wave is radiated, and the extension 222 is used to fix the voice coil 23, that is, the voice coil holder 22 and the diaphragm 21 are integrated.
  • the structure reduces the fitting error of the assembly between the parts, improves its acoustic performance, simplifies the assembly process, and improves the production efficiency.
  • the extension wall 222 includes a first extension wall 2221 bent and extended from the flat wall 221 in a direction away from the vibrating portion 211 of the diaphragm 21, and a second extension wall 2221 bent and extended from the first extension wall 2221 in a direction close to the magnetic circuit system 3.
  • the second extension wall 2222 abuts against the outer side of the voice coil 23 and forms a fixed connection.
  • the extension wall 222 may be an integral ring structure, or may be a split structure enclosed in a ring shape. In this embodiment, the extension walls 222 include three and are arranged at equal intervals.
  • One side of the auxiliary diaphragm 24 is fixed to the outer wall 12, and the other side is fixed to the end of the first extension wall 2221 away from the flat wall 221 and spaced from the inner wall 13 to prevent the lateral swing of the voice coil bracket 22, thereby avoiding sound
  • the lateral swing of the ring 23 improves the stability of the sound generating device 100.
  • the magnetic circuit system 3 is installed in the accommodating space 10, and passes through the relief hole 2130 to pass through the diaphragm 21 and extend to the outside of the basin 1.
  • the magnetic circuit system 3 includes a magnetic bowl (not shown in the figure) fixed to the basin frame 1 and a magnetic steel unit 32 fixed to the magnetic bowl.
  • the magnetic bowl includes a bottom wall for fixing the magnetic steel unit 32 ( Figure Not marked) and the side walls (not marked in the figure) that are spaced apart from the magnetic steel unit 32 and form the magnetic gap 30; the bottom wall is fixedly supported on the bottom plate 11, and the second fixing portion 2132 is fixedly supported on the side walls.
  • the magnetic bowl includes a first magnetic bowl 31 and a second magnetic bowl 34, and the side wall is provided with a relief groove 33 penetrating through it and matching the second extension wall 2222, that is, the shape and number of the relief groove 33 are the same as those of the second extension wall 2222.
  • the shape and number of the second extension wall 2222 are matched correspondingly.
  • the first magnetic bowl 31 includes a first magnetic bowl bottom wall 311 and a first magnetic bowl side wall 312; further, the first magnetic bowl bottom wall 311 is fixed to the bottom plate 11 to serve as a bottom wall, and the first magnetic bowl side wall 312 is formed by the first magnetic bowl side wall 312.
  • a bottom wall 311 of a magnetic bowl is bent and extended in the direction close to the diaphragm 21, and the side wall 312 of the first magnetic bowl is fixed to the inner side of the inner wall 13; further, the side wall 312 of the first magnetic bowl is fixed to the first fixing At the same time, the first magnetic bowl side wall 312 is recessed to form a first limiting groove 3120, and the first magnetic bowl side wall 312 is clamped in the limiting protrusion 1303 through the first limiting groove 3120 to realize the first limiting groove 3120.
  • the limit of a magnetic bowl 31 is fixed.
  • the second magnetic bowl 34 includes a second magnetic bowl bottom wall 341 and a second magnetic bowl side wall 342; further, the second magnetic bowl bottom wall 341 and the first magnetic bowl bottom wall 311 are arranged directly opposite to each other, and the second magnetic bowl side
  • the wall 342 is bent and extended from the second magnetic bowl bottom wall 341 in the direction close to the first magnetic bowl side wall 312.
  • the second magnetic bowl side wall 342 abuts and fixes the inner side of the inner wall 13, and the second magnetic bowl side wall 342 can abut against
  • the first magnetic bowl side wall 312 may also be spaced from the first magnetic bowl side wall 312; further, the second magnetic bowl side wall 342 is abutted and fixed to the second fixing protrusion 1302, and at the same time, the second magnetic bowl side wall 342
  • the recess forms a second limiting groove 3420, and the second magnetic bowl side wall 342 is clamped in the limiting protrusion 1303 through the second limiting groove 3420 to realize the limiting and fixing of the second magnetic bowl 34.
  • the magnetic steel unit 32 is fixed to the first magnetic bowl bottom wall 311, and the second magnetic bowl bottom wall 341 is provided on the end of the magnetic steel unit 32 away from the first magnetic bowl bottom wall 311; the magnetic steel unit 32 and the first magnetic bowl side wall 311 A magnetic gap 30 is formed together with the second magnetic bowl side wall 342, and the second fixing portion 2132 is fixed on the second magnetic bowl side wall 342.
  • the relief groove 33 extends along the vibration direction and penetrates the first magnetic bowl side wall 312 and the second magnetic bowl side wall 342.
  • the first extension wall 2221 is arranged around the outside of the magnetic circuit system 3 and is arranged at intervals.
  • the relief slot 33 and the through opening 131 are arranged directly opposite one another.
  • the first extension wall 2221 is arranged around the inner wall 13 and spaced apart, and the second extension wall 2222 sequentially extends into the magnetic gap 30 through the opening 131 and the relief groove 33 and is connected to the outer side of the voice coil 23.
  • the magnetic circuit system 3 passes through the diaphragm 21 through the relief hole 2130 and extends to the outside of the basin frame 1, that is, the second magnetic bowl 34 is partially located outside the containing space 10, forming an exposed Structure, and the vertical distance between the vibration portion 211 at the position of maximum amplitude and the surface of the first magnetic bowl bottom wall 311 away from the magnetic steel unit 32 is less than or equal to the height of the magnetic bowl in the vibration direction, so that the diaphragm 21 wraps around in the horizontal direction
  • the top of the magnetic circuit system 3 effectively saves the space of the product in the vibration direction, improves the space utilization rate, thereby saves the space of the product in the vibration direction, and effectively reduces the thickness of the product.
  • the magnetic field lines on the side of the magnetic steel unit 32 close to the diaphragm 21 are effectively guided back into the magnetic gap 30, so that the magnetic field lines of the magnetic circuit system 3 are more fully utilized;
  • the magnetic bowl is only provided with the first magnetic bowl.
  • the second fixing portion of the diaphragm is fixed on the side wall of the first magnetic bowl.
  • the second fixing portion 2132 is fixed and supported on the inner wall 13, that is, the second fixing portion 2132 is fixed on the side wall 342 and the inner wall 13 of the second magnetic bowl at the same time, which effectively improves the The reliability of the assembly of the two fixing parts 2132 is fixed, thereby improving the vibration reliability of the diaphragm 21.
  • the sound emitting device 100' in the second embodiment has basically the same structure as the sound emitting device in the first embodiment. Here, the same parts between the two will not be repeated.
  • the difference between the sound emitting device 100' and the sound emitting device in the first embodiment lies in the positional connection relationship of the second fixing part of the diaphragm, which will be described below in conjunction with the specific structure:
  • the sound generating device 100' includes a basin frame 1', a vibration system (not shown in the figure) fixed to the basin frame 1', and a magnetic circuit system 3'for driving the vibration system to vibrate.
  • the basin frame 1' includes a bottom plate 11', an outer wall 12' bent and extended from the periphery of the bottom plate 11', and an inner wall 13' bent and extended from the bottom plate 11'; the outer wall 12' is arranged around the inner wall 13' and is spaced apart from each other, the bottom plate 11' and The inner walls 13' collectively enclose a receiving space 10'.
  • the magnetic circuit system 3' is installed in the containing space 10' and includes a magnetic bowl 31' fixed to the bottom plate 11' and a magnetic steel unit 32' fixedly housed in the magnetic bowl 31'.
  • the vibration system includes a diaphragm 21' fixed to the basin frame 1', and a second fixing portion 2132' of the diaphragm 21' is fixedly supported on the inner wall 13' and is spaced apart from the magnetic bowl 31'.
  • the diaphragm includes a first fixing part fixed to the basin frame, a second fixing part fixed to the side wall and/or inner wall, and connecting the first fixing part and the second fixing part.
  • the vibration part, and the vertical distance between the vibration part at the position of maximum amplitude and the surface of the bottom wall away from the magnetic steel unit is less than or equal to the height of the magnetic bowl along the vibration direction.

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

Abstract

La présente invention concerne un dispositif sonore. Le dispositif sonore comprend un cadre de bassin, un système de vibration supporté sur le cadre de bassin et un système de circuit magnétique. Le cadre de bassin comprend une plaque inférieure, une paroi externe s'étendant à partir de la périphérie de la plaque inférieure d'une manière courbée et une paroi interne s'étendant à partir de la plaque inférieure d'une manière courbée. Le système de circuit magnétique comprend un bol magnétique et une unité d'acier magnétique, la cuve magnétique comprenant une paroi inférieure pour fixer l'unité d'acier magnétique et une paroi latérale qui est disposée à un intervalle avec l'unité d'acier magnétique et forme un entrefer magnétique. Le système de vibration comprend une membrane vibrante, un support de bobine acoustique et une bobine acoustique; la membrane vibrante comprend une première partie de fixation fixée sur la paroi extérieure, une seconde partie de fixation fixée sur la paroi latérale et/ou la paroi interne et une partie de vibration pour relier la première partie de fixation et la seconde partie de fixation; le support de bobine acoustique est fixé à la partie vibrante; et la bobine acoustique est insérée dans l'espace magnétique au moyen du support de bobine acoustique de façon à être utilisée pour entraîner la partie de vibration pour produire un son. La distance verticale entre la position d'amplitude maximale de la partie de vibration et la surface de la paroi inférieure à l'opposé de l'unité d'acier magnétique est inférieure ou égale à la hauteur de la cuve magnétique dans la direction de vibration. Par rapport à l'état de la technique associé, le dispositif sonore de la présente invention présente un taux d'utilisation d'espace élevé et une faible épaisseur.
PCT/CN2019/123900 2019-11-21 2019-12-09 Dispositif sonore WO2021097955A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911150823.1 2019-11-21
CN201911150823.1A CN111065025B (zh) 2019-11-21 2019-11-21 发声器件

Publications (1)

Publication Number Publication Date
WO2021097955A1 true WO2021097955A1 (fr) 2021-05-27

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CN (1) CN111065025B (fr)
WO (1) WO2021097955A1 (fr)

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CN212628394U (zh) * 2020-05-28 2021-02-26 瑞声科技(新加坡)有限公司 发声器件
CN213462306U (zh) * 2020-07-06 2021-06-15 瑞声科技(新加坡)有限公司 扬声器
CN212785822U (zh) * 2020-07-06 2021-03-23 瑞声科技(新加坡)有限公司 一种发声器件
CN213938312U (zh) * 2020-07-06 2021-08-10 瑞声科技(新加坡)有限公司 发声器件
CN213403488U (zh) * 2020-09-04 2021-06-08 瑞声光电科技(常州)有限公司 发声器件
TWI812007B (zh) * 2022-02-14 2023-08-11 金大仁 改善中音谷的平面揚聲器
CN114630249B (zh) * 2022-04-26 2024-04-30 歌尔股份有限公司 发声模组和电子设备
CN117119359B (zh) * 2023-10-18 2024-03-15 瑞声光电科技(常州)有限公司 发声器件

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