WO2022062332A1 - Ensemble composite de circuits magnétiques à rondelles pour haut-parleur à conduction osseuse - Google Patents

Ensemble composite de circuits magnétiques à rondelles pour haut-parleur à conduction osseuse Download PDF

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Publication number
WO2022062332A1
WO2022062332A1 PCT/CN2021/080886 CN2021080886W WO2022062332A1 WO 2022062332 A1 WO2022062332 A1 WO 2022062332A1 CN 2021080886 W CN2021080886 W CN 2021080886W WO 2022062332 A1 WO2022062332 A1 WO 2022062332A1
Authority
WO
WIPO (PCT)
Prior art keywords
washer
composite
voice coil
magnet
bone conduction
Prior art date
Application number
PCT/CN2021/080886
Other languages
English (en)
Chinese (zh)
Inventor
胡强
Original Assignee
苏州登堡电子科技有限公司
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
Priority claimed from CN202011006226.4A external-priority patent/CN112312284A/zh
Priority claimed from CN202022096141.1U external-priority patent/CN212259323U/zh
Application filed by 苏州登堡电子科技有限公司 filed Critical 苏州登堡电子科技有限公司
Publication of WO2022062332A1 publication Critical patent/WO2022062332A1/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 technology of audio devices, in particular to the technology of a composite washer magnetic circuit assembly of a bone conduction speaker.
  • the vibration amplitude of the voice coil is large, and the whole will enter the non-horizontal asymmetric magnetic field above and below the voice coil, resulting in large harmonic distortion.
  • the traditional way to solve this problem is to increase the thickness of the magnetic washer, so that the voice coil vibrates in the horizontal magnetic field as much as possible.
  • the washer is a magnetic material, the thickness of the washer increases, which will cause the overall self-inductance coefficient of the bone conduction speaker to increase, and the high frequency attenuation will be larger.
  • the technical problem to be solved by the present invention is to provide a bone conduction speaker composite washer magnetic circuit assembly with low low frequency harmonic distortion and wide high frequency response.
  • a bone conduction speaker composite washer magnetic circuit assembly includes a yoke and a voice coil, and is characterized in that: a column-shaped composite member is arranged in the middle of the yoke; The composite component is formed by stacking the lower magnet, the composite washer, and the upper magnet sequentially from bottom to top. The upper end of the upper magnet is equipped with a vibrating diaphragm, and the voice coil is installed on the vibrating diaphragm through a skeleton.
  • the ring passes through, and the composite member and the voice coil are in clearance fit;
  • the lower magnet and the upper magnet are permanent magnets, and the polarity of the upper end of the lower magnet is consistent with the polarity of the lower end of the upper magnet;
  • the composite washer is composed of N+ One ferromagnetic washer and N non-ferromagnetic washer are alternately stacked from bottom to top, and N ⁇ 1.
  • the composite washer magnetic circuit component of the bone conduction speaker adopts the method of adding a non-ferromagnetic washer between the ferromagnetic washer to form a composite washer, so as to increase the thickness of the washer and thus increase the transverse voice coil.
  • the height of the horizontal magnetic field reduces the harmonic distortion of the bone conduction speaker in the low frequency range; and because the total thickness of the ferromagnetic washer does not actually increase, and it is no longer in the middle of the voice coil after being divided into two, the bone conduction speaker
  • the self-inductance coefficient of is also reduced, so that the high frequency response is extended.
  • FIG. 1 is a schematic structural diagram of a composite washer magnetic circuit assembly of a bone conduction speaker according to an embodiment of the present invention.
  • a bone conduction speaker composite washer magnetic circuit assembly provided by an embodiment of the present invention includes a yoke 1 and a voice coil 7, and a cylindrical composite member is provided in the middle of the yoke 1;
  • the composite component is formed by stacking the lower magnet 2, the composite washer, and the upper magnet 6 sequentially from bottom to top.
  • the upper end of the upper magnet 6 is provided with a vibrating diaphragm 8, and the voice coil 7 is mounted on the vibrating diaphragm 8 through a skeleton 9.
  • the composite member passes through the inner ring of the voice coil 7, and the composite member and the voice coil 7 are clearance fit;
  • the lower magnet 2 and the upper magnet 6 are both permanent magnets, and the polarity of the upper end of the lower magnet is the same as that of the lower end of the upper magnet.
  • the polarity is the same;
  • the composite washer is formed by alternately stacking two ferromagnetic washer 3, 5 and a non-ferromagnetic washer 4 from bottom to top, and the non-ferromagnetic washer can be made of copper, aluminum, plastic, etc.
  • ferromagnetic washer can be made of ferromagnetic materials such as iron and iron alloys.
  • the composite washer may also be formed by alternately stacking multiple ferromagnetic washer and multiple non-ferromagnetic washer from bottom to top, but the number of ferromagnetic washer should be larger than that of non-ferromagnetic washer. The number is one more, so that the upper and lower ends of the composite washer are ferromagnetic washer.
  • the working principle of the embodiment of the present invention is as follows: the magnetic field lines (dotted lines with arrows in FIG. 1 ) are emitted from the lower magnet 2 and the upper magnet 6 , pass through the two ferromagnetic washers 3 and 5 respectively, and then pass through the voice coil 7 and enter the yoke 1. Some of the magnetic lines of force return to the bottom of the lower magnet 2 through the yoke 1, and the other part of the magnetic lines of force return to the top of the upper magnet 6 through the space.
  • the upper and lower ends of the composite washer are ferromagnetic washer, and the middle is a non-ferromagnetic washer.
  • the height of the horizontal magnetic field across the voice coil can be more than doubled, which can reduce the low noise of the bone conduction speaker. Harmonic distortion and abnormal sound in the frequency band, for the user, the actual feeling is that the vibration sense is significantly reduced, and the comfort level is significantly improved; and because the total thickness of the ferromagnetic washer does not actually increase, and it is not divided into two parts.
  • the self-inductance coefficient of the bone conduction speaker is also reduced, so that the high frequency response above 10KHz can be expanded and improved.

Landscapes

  • 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 ensemble circuit magnétique à rondelle composite d'un haut-parleur à conduction osseuse, comprenant une culasse (1) et une bobine acoustique (7) ; un élément composite cylindrique est prévu dans la partie centrale de la culasse (1) ; l'élément composite est formé en empilant séquentiellement un aimant inférieur (2), une rondelle composite et un aimant supérieur (6) de bas en haut, une membrane vibrante (8) est prévue sur l'extrémité supérieure de l'aimant supérieur (6), la bobine acoustique (7) est montée sur la membrane vibrante (8) au moyen d'une bobine (9), l'élément composite pénètre à travers un anneau intérieur de la bobine acoustique (7), et l'élément composite est en ajustement avec jeu avec la bobine acoustique (7) ; l'aimant inférieur (2) et l'aimant supérieur (6) sont tous deux des aimants permanents, et la polarité de l'extrémité supérieure de l'aimant inférieur (2) est cohérente avec celle de l'extrémité inférieure de l'aimant supérieur (6) ; et la rondelle composite est formée en empilant alternativement des rondelles ferromagnétiques (3, 5) et une rondelle non ferromagnétique (4) de bas en haut. Le circuit magnétique composite de la rondelle présente une faible distorsion harmonique à basse fréquence et une large réponse à haute fréquence.
PCT/CN2021/080886 2020-09-23 2021-03-15 Ensemble composite de circuits magnétiques à rondelles pour haut-parleur à conduction osseuse WO2022062332A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202011006226.4 2020-09-23
CN202011006226.4A CN112312284A (zh) 2020-09-23 2020-09-23 骨传导扬声器复合华司磁路组件
CN202022096141.1U CN212259323U (zh) 2020-09-23 2020-09-23 骨传导扬声器复合华司磁路组件
CN202022096141.1 2020-09-23

Publications (1)

Publication Number Publication Date
WO2022062332A1 true WO2022062332A1 (fr) 2022-03-31

Family

ID=80844827

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/080886 WO2022062332A1 (fr) 2020-09-23 2021-03-15 Ensemble composite de circuits magnétiques à rondelles pour haut-parleur à conduction osseuse

Country Status (1)

Country Link
WO (1) WO2022062332A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2018210C1 (ru) * 1992-02-28 1994-08-15 Совместное предприятие "Инвестпол" Электроакустический преобразователь
RU2150181C1 (ru) * 1998-09-10 2000-05-27 Волегов Виктор Евгеньевич Электроакустический преобразователь
US20060251286A1 (en) * 2005-04-13 2006-11-09 Stiles Enrique M Multi-gap air return motor for electromagnetic transducer
CN201450586U (zh) * 2009-05-08 2010-05-05 张宇贤 低音扬声器的磁路构造
CN102892063A (zh) * 2011-07-21 2013-01-23 张凡 具有对称磁路及对称线圈电路的多驱动器换能器
CN106028240A (zh) * 2016-07-23 2016-10-12 歌尔股份有限公司 扬声器
CN212259323U (zh) * 2020-09-23 2020-12-29 苏州登堡电子科技有限公司 骨传导扬声器复合华司磁路组件
CN112312284A (zh) * 2020-09-23 2021-02-02 苏州登堡电子科技有限公司 骨传导扬声器复合华司磁路组件

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2018210C1 (ru) * 1992-02-28 1994-08-15 Совместное предприятие "Инвестпол" Электроакустический преобразователь
RU2150181C1 (ru) * 1998-09-10 2000-05-27 Волегов Виктор Евгеньевич Электроакустический преобразователь
US20060251286A1 (en) * 2005-04-13 2006-11-09 Stiles Enrique M Multi-gap air return motor for electromagnetic transducer
CN201450586U (zh) * 2009-05-08 2010-05-05 张宇贤 低音扬声器的磁路构造
CN102892063A (zh) * 2011-07-21 2013-01-23 张凡 具有对称磁路及对称线圈电路的多驱动器换能器
CN106028240A (zh) * 2016-07-23 2016-10-12 歌尔股份有限公司 扬声器
CN212259323U (zh) * 2020-09-23 2020-12-29 苏州登堡电子科技有限公司 骨传导扬声器复合华司磁路组件
CN112312284A (zh) * 2020-09-23 2021-02-02 苏州登堡电子科技有限公司 骨传导扬声器复合华司磁路组件

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