WO2021174577A1 - Dispositif de génération de son - Google Patents

Dispositif de génération de son Download PDF

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Publication number
WO2021174577A1
WO2021174577A1 PCT/CN2020/079058 CN2020079058W WO2021174577A1 WO 2021174577 A1 WO2021174577 A1 WO 2021174577A1 CN 2020079058 W CN2020079058 W CN 2020079058W WO 2021174577 A1 WO2021174577 A1 WO 2021174577A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
diaphragm
voice coil
magnetic part
splint
Prior art date
Application number
PCT/CN2020/079058
Other languages
English (en)
Chinese (zh)
Inventor
肖波
令狐荣林
章统
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 WO2021174577A1 publication Critical patent/WO2021174577A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the invention relates to the field of sound and electricity, and in particular to a sound emitting device used in portable electronic products.
  • Sound devices in the related art include a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and emit sound.
  • the vibration system includes a diaphragm fixed on the basin frame and used to drive the upper and lower diaphragms to vibrate. Voice coil for vocalization.
  • this kind of sound device cannot meet the needs of special occasions that require double-sided sound.
  • the purpose of the present invention is to provide a sound emitting device to solve the problem that the sound emitting device in the related art cannot meet the requirement of double-sided sound.
  • the present invention provides a sounding device, which includes a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and emit sound.
  • the basin frame is provided with a leak hole through it.
  • the vibration system includes an upper diaphragm and a lower diaphragm respectively fixed on opposite sides of the basin frame, an upper voice coil that drives the upper diaphragm to vibrate and sound, and a lower voice that drives the lower diaphragm to vibrate and sound.
  • the magnetic circuit system includes a splint fixed on the basin frame and a first magnetic part, a second magnetic part and a third magnetic part fixed on the side of the splint facing the upper diaphragm, so The second magnetic portion and the first magnetic portion are spaced apart to form an internal magnetic gap, and the third magnetic portion is located on a side of the second magnetic portion away from the first magnetic portion and spaced apart from the second magnetic portion Is arranged to form an outer magnetic gap, the third magnetic part has a leakage passage connecting the outer magnetic gap and the leakage hole, wherein the upper voice coil is inserted into the inner magnetic gap, and the lower voice coil is inserted into the In the outer magnetic gap, an escape hole for avoiding the skeleton is penetrated at a position of the splint facing the
  • the frame includes a main body part connected to the lower diaphragm and a plurality of connection parts extending from the main body part to the splint and passing through the escape hole, the connection part and the Lower voice coil connection.
  • the lower voice coil has a rectangular structure with rounded corners, the connecting portions are provided with four, and the four connecting portions are connected to the four rounded corners of the lower voice coil in a one-to-one correspondence.
  • the vibration system further includes an upper dome and a lower dome arranged in the receiving space, and the upper dome is respectively connected to the upper diaphragm and the upper sound at two opposite sides in the vibration direction.
  • the ring is connected, and the opposite sides of the lower dome in the vibration direction are respectively connected with the main body and the lower diaphragm.
  • the third magnetic part is composed of a plurality of third permanent magnets arranged around the second magnetic part, and two adjacent third permanent magnets are arranged at intervals, wherein two adjacent to the leakage hole The third permanent magnets are arranged at intervals to form the leakage channel.
  • the second magnetic part is a second permanent magnet
  • the second permanent magnet has a continuous ring structure.
  • a first pole core is fixedly arranged on the side of the first magnetic part away from the splint, and a second pole core is fixedly arranged on the side of the second magnetic part away from the splint.
  • a third pole core is fixedly arranged on the side of the three magnetic part away from the clamping plate, and the clamping plate is a clamping plate made of soft magnetic material.
  • a first recessed portion is recessed at a position of the splint facing the leakage passage
  • a second recessed portion is recessed at a position of the third pole core facing the leakage passage
  • the first The opening of the recess and the opening of the second recess face the leakage passage.
  • the sound emitting device further includes an upper end cover and a lower end cover, the upper diaphragm is sandwiched between the basin frame and the upper end cover, and the upper end cover is provided for the upper diaphragm to emit sound outwards.
  • the lower diaphragm is sandwiched between the basin frame and the lower end cover, and the lower end cover has a second sound hole for the lower diaphragm to emit sound outward.
  • the sound emitting device of the present invention drives the upper diaphragm and the lower diaphragm to vibrate and emit sound through the upper voice coil and the lower voice coil, respectively, so that the sound emitting device can emit sound on both sides, and
  • the upper diaphragm and the lower diaphragm can work independently; at the same time, by inserting the upper voice coil and the lower voice coil into the inner magnetic gap and the outer magnetic gap of the magnetic circuit system, respectively, The upper diaphragm and the lower diaphragm share the same magnetic circuit system, thereby improving the utilization rate of the magnetic circuit.
  • the magnetic circuit system by setting the magnetic circuit system to have the inner magnetic gap, the outer magnetic gap, the escape hole, and the leakage channel, the upper diaphragm or/and the lower diaphragm are vibrated when the , The airflow in the containing space can circulate with the outside through the leakage hole.
  • Figure 1 is a perspective view of a preferred embodiment of the sound generating device of the present invention
  • Fig. 2 is an exploded view of the sound emitting device shown in Fig. 1;
  • Fig. 3 is a cross-sectional view of the sound emitting device shown in Fig. 1 along the A-A direction;
  • Fig. 4 is a cross-sectional view of the sound emitting device shown in Fig. 1 along the B-B direction;
  • FIG. 5 is a schematic diagram of the structure of part of the structure of the sound device of the present invention after assembly
  • Fig. 6 is a schematic structural diagram of a part of the structure shown in Fig. 5 with the splint removed;
  • Fig. 7 is a schematic structural diagram of part of the structure of the vibration system in the sound device of the present invention after assembly;
  • FIG. 8 is a schematic diagram of the structure of the splint and the skeleton of the sound generating device of the present invention after being assembled.
  • the sound emitting device 100 has two sound emitting surfaces, and is suitable for electronic devices with double-sided sounding requirements, such as double-sided screen mobile phones.
  • the sound generating device 100 includes a basin frame 1, a vibration system 3 fixed to the basin frame 1 and a magnetic circuit system 5 that drives the vibration system 3 to vibrate and produce sound.
  • the basin frame 1 is provided with a leakage hole 1A through it.
  • the basin frame 1 has a rectangular structure and includes a pair of first side walls 11 and a second side wall 13 connected to the pair of first side walls 11 opposite to each other.
  • a pair of the first side walls 11 are provided with the leakage holes 1A, and the two leakage holes 1A are symmetrically distributed with respect to the cross-sectional plane in the B-B direction.
  • the magnetic circuit system 5 includes a splint 51 fixed on the basin frame 1 and a first magnetic portion 52, a second magnetic portion 53 and a first magnetic portion 52 fixed on the side of the splint 51 facing the upper diaphragm 31 described later.
  • the third magnetic portion 54, the second magnetic portion 53 and the first magnetic portion 52 are spaced apart to form an inner magnetic gap 5A, and the third magnetic portion 54 is located on the second magnetic portion 53 away from the first magnetic
  • the outer magnetic gap 5B is formed on one side of the portion 52 and spaced from the second magnetic portion 53.
  • the third magnetic portion 54 has a leakage passage 54A connecting the outer magnetic gap 5B and the leakage hole 1A.
  • An avoiding hole 511 is penetrated at the position of 51 facing the outer magnetic gap 5B, and the avoiding hole 511 is used to avoid the frame 36 described later.
  • the first magnetic portion 52 is a first permanent magnet. It is understandable that, in other embodiments, the first magnetic portion 52 may also be formed by superimposing two, three, etc., first permanent magnets along the vibration direction X, and there is also a gap between two adjacent first permanent magnets. The pole core can be clamped.
  • the second magnetic portion 53 is a second permanent magnet, and the second permanent magnet has a continuous ring structure. It is understandable that in other embodiments, the second magnetic portion 53 may also be configured to be composed of a plurality of second permanent magnets surrounding the first magnetic portion, and two adjacent second permanent magnets Or, the second magnetic portion 53 may also be formed by superimposing two or three second permanent magnets in a continuous ring structure along the vibration direction X, and two adjacent second permanent magnets A pole core can also be sandwiched between.
  • the third magnetic portion 54 is composed of a plurality of third permanent magnets arranged around the second magnetic portion 53, and two adjacent third permanent magnets are arranged at intervals. Wherein, the two third permanent magnets adjacent to the leakage hole 1A are spaced apart to form the leakage passage 54A. It can be understood that, in other embodiments, the third magnetic portion 54 may also be a second permanent magnet in a ring structure. Accordingly, the position of the second permanent magnet corresponding to the leakage hole needs to be A leakage channel connecting the external magnetic gap and the leakage hole is opened.
  • the first permanent magnet, the second permanent magnet, and the third permanent magnet mentioned above are usually made of magnetic steel. It is understandable that the first permanent magnet, the second permanent magnet, and the third permanent magnet can also be natural magnets.
  • a first pole core 55 is fixed on the side of the first magnetic part 52 away from the clamping plate 51, and the second magnetic part 53 is away from the clamping plate 51.
  • a second pole core 56 is fixed on one side, and a third pole core 57 is fixed on the side of the third magnetic portion 54 away from the clamping plate 51.
  • the clamping plate 51 is a clamping plate made of soft magnetic material.
  • the inner magnetic gap 5A and the outer magnetic gap 5B can be effectively increased
  • the internal magnetic flux can improve the acoustic performance of the sound emitting device 100, and at the same time, it is also conducive to the light and thin design of the sound emitting device 100.
  • first pole core 55, the second pole core 56, and the third pole core 57 are located in the same horizontal plane.
  • a first recess 513 is formed in a position where the clamping plate 51 faces the leakage passage 54A, and a first recess 513 is formed in a position where the third pole core 57 faces the leakage passage 54A.
  • Two recessed portions 571, the opening of the first recessed portion 513 and the opening of the second recessed portion 571 face the leakage channel 54A.
  • the arrangement of the first recessed portion 513 and the second recessed portion 571 can increase the volume of the passage connecting the outer magnetic gap 5B and the leakage hole 1A.
  • the vibration system 3 includes an upper diaphragm 31, a lower diaphragm 33, an upper voice coil 34, a lower voice coil 35, and a frame 36.
  • the upper diaphragm 31 and the lower diaphragm 33 are respectively fixed to the basin frame 1.
  • the upper diaphragm 31, the lower diaphragm 33, and the basin frame 1 are enclosed to form a receiving space 100A, the magnetic circuit system 5 is received in the receiving space 100A, and the upper
  • the voice coil 34 drives the upper diaphragm 31 to vibrate and produce sound
  • the lower voice coil 35 drives the lower diaphragm 33 to vibrate and produce sound
  • the skeleton 36 connects the lower voice coil 35 and the lower diaphragm 33.
  • the upper voice coil 34 is inserted into the inner magnetic gap 5A
  • the lower voice coil 35 is inserted into the outer magnetic gap 5B
  • the avoiding hole 511 of the clamping plate 51 avoids the skeleton 36.
  • the upper voice coil 34 and the lower voice coil 35 are connected to an external power source through a flexible circuit board (not shown). After the upper voice coil 34 is energized, under the magnetic force of the magnetic circuit system 5, The upper diaphragm 31 vibrates along with the upper voice coil 34; after the lower voice coil 35 is energized, under the magnetic force of the magnetic circuit system 5, the lower diaphragm 33 and the skeleton 36 follow the The voice coil 35 will vibrate together.
  • the sound emitting device can produce sound on both sides, and the upper diaphragm 31 and the lower
  • the lower diaphragm 33 can work independently; and because the upper voice coil 34 and the lower voice coil 35 are respectively inserted into the inner magnetic gap 5A and the outer magnetic gap 5B of the magnetic circuit system 5, so that The upper diaphragm 31 and the lower diaphragm 33 share the same magnetic circuit system, which improves the utilization rate of the magnetic circuit.
  • the magnetic circuit system 5 has the inner magnetic gap 5A, the outer magnetic gap 5B, the escape hole 511, and the leakage channel 54A, the upper diaphragm 31 or/and the lower vibration When the membrane 33 vibrates, the airflow in the receiving space 100A can circulate with the outside through the leakage hole 1A.
  • the frame 36 includes a main body portion 361 connected to the lower diaphragm 33 and a plurality of connecting portions 363 extending from the main body portion 361 toward the splint 51 and passing through the escape holes 511.
  • the connection The part 363 is connected to the lower voice coil 35.
  • the structure of the frame 36 with multiple connecting portions 363 can avoid the splint 51 to a greater extent, so that the splint 51 can be designed to utilize more sufficient magnetic permeability to increase the outer magnetic gap 5B. The magnetic flux, thereby improving the vibration performance of the lower diaphragm 33.
  • the main body portion 361 has a flat plate shape.
  • the flat main body 361 can strengthen the connection strength between the frame 36 and the lower diaphragm 33. It can be understood that the implementation of the main body portion 361 is not limited to this; for example, in other embodiments, the main body portion 361 may also be arranged in a continuous ring structure.
  • the upper voice coil 34 and the lower voice coil 35 have a rounded rectangular structure
  • the connecting portion 363 is provided with four, and the four connecting portions 363 correspond to each other one-to-one.
  • the flexible circuit board is electrically welded to the rounded positions of the upper voice coil 34 and the lower voice coil 35 respectively.
  • the vibration system 3 further includes an upper dome 37 and a lower dome 38 arranged in the containing space 100A.
  • the upper dome 37 is opposite to each other along the opposite sides of the vibration direction X.
  • the upper diaphragm 31 is connected to the upper voice coil 34, and the lower dome 38 is connected to the main body 361 and the lower diaphragm 33 on opposite sides along the vibration direction X, respectively.
  • the upper dome 37 and the lower dome 38 may also be arranged outside the receiving space 100A, and the upper diaphragm 31 is opposite to each other in the vibration direction X.
  • the sides are respectively connected to the upper voice coil 34 and the upper dome 37, and the lower diaphragm 33 is respectively connected to the lower dome 38 and the main body 361 along the opposite sides of the vibration direction X.
  • the sound generating device 100 further includes an upper end cover 7 and a lower end cover 9, and the upper diaphragm 31 is sandwiched between the basin frame 1 and the upper end cover 7.
  • the upper end cover 7 has a first sounding hole 71 for the upper diaphragm 31 to emit sound outward
  • the lower diaphragm 33 is sandwiched between the basin frame 1 and the lower end cover 9, and the lower end
  • the cover 9 has a second sound hole 91 for the lower diaphragm 33 to sound outward.
  • the arrangement of the upper end cover 7 and the lower end cover 9 can better fix the upper diaphragm 31 and the lower diaphragm 33 on the basin frame 1.
  • the sound emitting device of the present invention drives the upper diaphragm 31 and the lower diaphragm 33 to vibrate and emit sound through the upper voice coil 34 and the lower voice coil 35, respectively, so that the sound emitting device can be double-sided Sound, and the upper diaphragm 31 and the lower diaphragm 33 can work independently; at the same time, by inserting the upper voice coil 34 and the lower voice coil 35 into the inner magnetic circuit system 5 respectively In the gap 5A and the outer magnetic gap 5B, the upper diaphragm 31 and the lower diaphragm 33 share the same magnetic circuit system, thereby improving the utilization rate of the magnetic circuit.
  • the magnetic circuit system 5 by setting the magnetic circuit system 5 to have the inner magnetic gap 5A, the outer magnetic gap 5B, the escape hole 511, and the leakage channel 54A, the upper diaphragm 31 or/and the When the lower diaphragm 33 vibrates, the airflow in the receiving space 100A can circulate with the outside through the leakage hole 1A.

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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 concerne un dispositif de génération de son, qui comprend un cadre de bassin, un système de vibration et un système de circuit magnétique. Un trou de fuite pénètre dans le cadre de bassin. Le système de vibration comprend une membrane supérieure, une membrane inférieure, une bobine mobile supérieure, une bobine mobile inférieure et un squelette qui relie la bobine mobile inférieure et la membrane inférieure. La membrane supérieure, la membrane inférieure et le cadre du bassin sont fermés pour former un espace de réception. Le système de circuit magnétique est logé dans l'espace de logement. Le système de circuit magnétique comprend une attelle qui maintient et fixe le cadre du bassin et une première partie magnétique, une deuxième partie magnétique et une troisième partie magnétique fixées sur l'attelle. La seconde partie magnétique est espacée de la première partie magnétique pour former un espace magnétique interne. La troisième partie magnétique est située sur le côté de la deuxième partie magnétique à l'opposé de la première partie magnétique, et est espacée de la deuxième partie magnétique pour former un entrefer magnétique extérieur. La troisième partie magnétique comporte un canal de fuite qui communique l'espace magnétique extérieur et le trou de fuite. La bobine acoustique supérieure est insérée dans l'espace magnétique intérieur, la bobine acoustique inférieure est insérée dans l'espace magnétique extérieur, et un trou d'évitement pour éviter que le squelette pénètre dans l'attelle. Par rapport à l'état de la technique associé, deux surfaces de génération de son du dispositif de génération de son de la présente invention peuvent vibrer indépendamment et générer un son.
PCT/CN2020/079058 2020-03-05 2020-03-12 Dispositif de génération de son WO2021174577A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202020265051.8 2020-03-05
CN202020265051.8U CN211744719U (zh) 2020-03-05 2020-03-05 发声器件

Publications (1)

Publication Number Publication Date
WO2021174577A1 true WO2021174577A1 (fr) 2021-09-10

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Application Number Title Priority Date Filing Date
PCT/CN2020/079058 WO2021174577A1 (fr) 2020-03-05 2020-03-12 Dispositif de génération de son

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CN (1) CN211744719U (fr)
WO (1) WO2021174577A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113068105B (zh) 2021-05-07 2023-03-24 台湾立讯精密有限公司 双面扬声装置
CN116033318B (zh) * 2021-10-27 2023-12-08 华为终端有限公司 扬声器及电子设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205142500U (zh) * 2015-10-28 2016-04-06 瑞声光电科技(常州)有限公司 发声器件
US9674603B1 (en) * 2016-02-24 2017-06-06 PAL Acoustics Technology Ltd. Coaxial speaker
CN206413193U (zh) * 2017-02-15 2017-08-15 微鲸科技有限公司 双向发声扬声器及音箱设备
CN107801133A (zh) * 2016-08-31 2018-03-13 陈全保 发声器件
CN207835795U (zh) * 2017-12-25 2018-09-07 歌尔科技有限公司 电声转换器及电子设备
EP3429228A1 (fr) * 2016-10-31 2019-01-16 Shenzhen Grandsun Electronic Co., Ltd. Haut-parleur et écouteur
CN208850052U (zh) * 2018-10-08 2019-05-10 北京小米移动软件有限公司 扬声器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205142500U (zh) * 2015-10-28 2016-04-06 瑞声光电科技(常州)有限公司 发声器件
US9674603B1 (en) * 2016-02-24 2017-06-06 PAL Acoustics Technology Ltd. Coaxial speaker
CN107801133A (zh) * 2016-08-31 2018-03-13 陈全保 发声器件
EP3429228A1 (fr) * 2016-10-31 2019-01-16 Shenzhen Grandsun Electronic Co., Ltd. Haut-parleur et écouteur
CN206413193U (zh) * 2017-02-15 2017-08-15 微鲸科技有限公司 双向发声扬声器及音箱设备
CN207835795U (zh) * 2017-12-25 2018-09-07 歌尔科技有限公司 电声转换器及电子设备
CN208850052U (zh) * 2018-10-08 2019-05-10 北京小米移动软件有限公司 扬声器

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