WO2006042448A1 - Diaphragme de haut-parleur - Google Patents

Diaphragme de haut-parleur Download PDF

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Publication number
WO2006042448A1
WO2006042448A1 PCT/CN2005/000644 CN2005000644W WO2006042448A1 WO 2006042448 A1 WO2006042448 A1 WO 2006042448A1 CN 2005000644 W CN2005000644 W CN 2005000644W WO 2006042448 A1 WO2006042448 A1 WO 2006042448A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
speaker
keel
main
vibration
Prior art date
Application number
PCT/CN2005/000644
Other languages
English (en)
Chinese (zh)
Inventor
Guang Cheng
Original Assignee
Guang Cheng
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 Guang Cheng filed Critical Guang Cheng
Publication of WO2006042448A1 publication Critical patent/WO2006042448A1/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
    • 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
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed

Definitions

  • the present invention relates to a speaker and a diaphragm thereof, particularly a speaker diaphragm which can reduce splitting vibration, reduce distortion, and cause the vibration of the diaphragm to follow the driving signal well, in order to achieve a high-fidelity playback effect.
  • the conventional speaker is mainly composed of a folding ring 1, a voice coil 4, a diaphragm 5, a magnetic conducting plate and a magnetic guiding column 6, a bracket 7, a centering piece 8, a magnetic conducting plate 9, and a magnet 10.
  • the voice coil 4 is moved by the electromagnetic force in the magnetic field, and the voice coil 4 is connected to the root of the diaphragm 5 to drive the diaphragm 5 to move, and the force is transmitted from the root of the diaphragm 5, Acting on the air before and after it, it vibrates to make a sound.
  • the ideal motion of the loudspeaker diaphragm 5 is linear with the change of the electrical signal.
  • the air vibration before and after it is linear with the change of the electrical signal.
  • the ideal loudspeaker can re-discharge the signal without distortion.
  • the actual speaker is not uniform due to the magnetic field, the nonlinearity of the centering piece 8, the deformation and distortion of the diaphragm 5, and the nonlinearity of the ring 1 cause nonlinear distortion of the reproduced sound.
  • the coil 4, the magnet 10, the centering piece 8, and the folding ring 1 have different roles in vibration, but the vibration mode is relatively simple.
  • the diaphragm 5 is different.
  • the sound coil is connected to the voice coil 4, and the driving force is transmitted to the entire diaphragm 5.
  • the diaphragm is restrained by the elastic constraint of the ring 1 and the elasticity of the air.
  • the diaphragm 5 can be regarded as a flexible body, which deforms itself and generates resonance during the transmission of force, so that the entire vibration process becomes very complicated and the distortion is large.
  • Traditional speakers are a lot more complicated
  • the spring vibration system is difficult to simplify as an equivalent system for calculation. So today, when computing technology is so developed, it is still impossible to calculate it accurately.
  • the existing speaker diaphragms mainly include the following: 1), the diaphragm is a homogeneous thick film, 2), the diaphragm is a unequal thick film, 3) , the diaphragm is a coated composite film, 4), the diaphragm For the sandwich composite membrane, 5), the diaphragm is a diaphragm with a ring-shaped rib, 6), the diaphragm is a pleated diaphragm with a pleated rib.
  • the first edition of the book "Practical Speaker Technology Handbook" published by the Defense Industry Press and edited by Wang Yizhen (April 2003) points out the problems of existing speakers on pages 62-71.
  • the diaphragm produces a circular or radial split vibration.
  • transient characteristics are exacerbated.
  • the force transmitted by the voice coil causes the diaphragm to deform, and the elastic force generated by the deformation gradually propagates outward.
  • the signal reversals cancel each other out. Therefore, it is particularly important to reduce the radial deformation of the speaker diaphragm.
  • the main disadvantages of the traditional method are: 1) Thickening the diaphragm will increase the quality of the vibrating body, increase the inertia, and reduce the sensitivity. 2), the sandwich composite film increases the manufacturing cost, increases the quality of the vibrating body, and the transient response is not good.
  • the composite film has limited ability to resist distortion and has limited ability to suppress vibration.
  • corrugated (pleated) type ribs ribs
  • the diaphragm has limited resistance to twisting and deformation, and the splitting vibration suppression ability is limited.
  • the corrugated reinforcing ribs are often formed into a ring shape, which can suppress radial (radial) splitting vibration and cannot suppress the ring.
  • the vibration is divided to reduce the intensity of the vibration force transmission direction, and the circular segmentation vibration is more serious. If the radial (radial) setting is used, the ring-shaped segmentation vibration can be suppressed, and the radial (radial) segmentation vibration cannot be suppressed, and the vibration can be reduced.
  • the traditional scheme has a certain effect on improving the sound quality of the speaker, but it can not avoid the defects of the "membrane” type vibration.
  • the main disadvantage of "membrane” vibration is that its vibration does not follow the signal very well.
  • the drumstick hits (drive signal)
  • the tympanic membrane vibrates for a long time (not synchronized with the drive signal), and there is resonance and distortion.
  • Figure 10 is a cross-sectional view of a conventional speaker, Figure 1 1-1, Figure 1 1 - 2, Figure 1 1 - 3, Figure 1 1-4 is a schematic diagram of diaphragm deformation (steady state) when the voice coil is displaced upward; 12- 1 ⁇ Figure 12-6 shows the distortion (dynamic) of the diaphragm when the voice coil vibrates up and down.
  • Figure 12-5 the vibration phases of a and b are opposite, and the sound energy emitted by each other cancels.
  • the resonance shown in Figure 12-6 is formed on the diaphragm, and the acoustic energy loss is greater, which is the main cause of the poor intermediate frequency characteristics of the speaker.
  • the present invention provides a novel speaker diaphragm which can effectively reduce the radial and circumferential deformation of the diaphragm, and performs overall motion under the action of the driving signal instead of "membrane" vibration. Its motion can better follow the drive signal, achieving the purpose of reducing distortion, improving efficiency, and reproducing high sound quality.
  • the technical solution for achieving the above object of the present invention is as follows:
  • the main keel is provided with a main keel and a sub keel, and the main keel is disposed outwardly from the joint between the speaker diaphragm and the voice coil, and the auxiliary keel is disposed in a direction crossing the same.
  • the main keel of the diaphragm of the present invention is perpendicular to the outer circle of the voice coil, and the secondary keel is perpendicular to the main keel.
  • the main and auxiliary keels of the present invention are disposed on the back or front side of the diaphragm.
  • the main and auxiliary keels of the present invention are disposed on the same side of the diaphragm or on both sides of the diaphragm.
  • the primary and secondary keels of the present invention are hollow or solid.
  • the shape of the diaphragm of the present invention is tapered, dome-shaped, elliptical or planar.
  • the main keel of the diaphragm of the present invention is arranged in the same direction as the normal direction of the voice coil.
  • the angle between the main and auxiliary keels of the present invention is 60° ⁇ 120.
  • the speaker of the present invention comprises a speaker diaphragm with a main sub-keel, the root of which is connected to the voice coil; and a magnetic circuit is also provided at the same time.
  • the speaker of the present invention further comprises a folding ring, a magnetic conductive plate and a magnetic conductive column, a bracket, a centering piece, a magnetic conductive plate and a magnet, and the folding ring is connected to the outer end of the diaphragm and the bracket, and the bracket passes through the magnetic conductive plate and the magnet Connected; the magnetic column is located at the core of the magnet.
  • the invention greatly improves the anti-twisting strength of the diaphragm due to the use of the keel structure, in particular, can reduce the splitting vibration, reduce the distortion, improve the efficiency, improve the rigidity-to-mass ratio of the diaphragm, and vibrate the diaphragm.
  • the drive signal is well followed, thereby improving the synchronization of the vibration of the diaphragm following the electrical signal, and the speaker with excellent sound quality can be produced with less expensive materials, achieving high fidelity playback.
  • Figure 1 is a cross-sectional view showing the structure of a speaker according to a preferred embodiment of the present invention.
  • Figure 2 is a bottom plan view of the diaphragm of Figure 1.
  • Figure 3 is a front elevational view of the diaphragm of Figure 1.
  • Figure 4 is a cross-sectional view taken along line B-B' of the diaphragm of Figure 2;
  • Figures 5-1, Figures 5-2, and 5-3 are schematic views of other embodiments of the modification of the A-A' cross-sectional view of Figure 3 in accordance with an embodiment of the present invention.
  • the shape of the keel section varies from hollow to solid or solid.
  • Figure 6 is another embodiment of a modification of the cross-sectional view taken along line A-A' of Figure 3 in accordance with an embodiment of the present invention.
  • the main keel and the secondary keel are respectively disposed on both sides of the diaphragm.
  • 7' and 7 are schematic views of the assembly process of the keel.
  • Figures 8' and 8 are schematic views of the assembly process of another keel.
  • Figure 9 is a schematic illustration of an embodiment of a modification in accordance with an embodiment of the present invention.
  • Fig. 10 is a schematic structural view of a conventional speaker.
  • Figure 1 1- 1 to Figure 1 1 - 4 is a schematic diagram of displacement deformation of a conventional loudspeaker diaphragm.
  • Figure 12-1 to Figure 12-6 are schematic diagrams showing vibration distortion of a conventional speaker diaphragm.
  • a speaker comprising a folding ring 1, a voice coil 4, a diaphragm 5, a magnetic conducting plate and a magnetic guiding column 6, a bracket 7, a centering piece 8, a magnetic conducting plate 9 and a magnet 10 Etc.
  • the folding ring 1 is connected to the diaphragm 5 and the outer end of the bracket, the bracket is connected to the magnet 10 via the magnetic conductive plate 9, the root of the diaphragm 5 is connected to the voice coil 4, and the magnetic column 6 is located at the core of the magnet 10.
  • the diaphragm 5 is provided with a main keel 3 and a sub keel 2, and the main keel 3 is disposed outwardly from the joint of the speaker diaphragm 5 and the voice coil 4 (radial direction).
  • the sub keel 2 is disposed in a direction perpendicular (intersecting) thereto, and the main keel 3 of the diaphragm 5 is perpendicular to the outer circumference of the voice coil 4.
  • the vibration force of the voice coil 5 is transmitted in the direction of the main keel 3.
  • the deformation of the diaphragm 5 in the direction of vibrational force transmission is small; likewise, due to the presence of the secondary keel 2, the diaphragm 5 is on its circumference.
  • the deformation in the direction is also small; the splitting vibration is small, the acoustic energy loss due to diaphragm resonance is reduced in the middle and high frequency bands, the distortion is small, and the frequency response is greatly improved.
  • the rigidity and strength are greatly improved compared with the conventional diaphragm, and the diaphragm can be made thinner and thinner than the conventional speaker diaphragm, and the overall strength is strong. Higher degrees.
  • the main keel transmits the vibration of the voice coil evenly and effectively to the diaphragm 5, which greatly reduces the radial deformation of the diaphragm.
  • the secondary keel strengthens the strength of the diaphragm in the other direction, reduces the zonal resonance, and makes the diaphragm integrally Synchronize with the voice coil.
  • a diaphragm is pressed into a tapered basin of a horizontal and vertical groove, and the other diaphragm is pressed into a tapered basin which can be closely adhered to the tapered surface of the diaphragm (similar to the conventional one).
  • the diaphragm is coated with glue between the two diaphragms and bonded together.
  • a keel diaphragm as shown in Fig. 3 is formed.
  • Another method is to bond the keel shown in Fig. 8' to a tapered basin (similar to a conventional diaphragm) to form a structure as shown in Fig. 8.
  • It can also be molded into a diaphragm with a keel using a one-shot method.
  • Fig. 6 shows another embodiment of the modification of the A-A' sectional view of Fig. 3 according to an embodiment of the present invention, in which the main keel and the secondary keel are respectively disposed on both sides of the diaphragm.
  • the diaphragm with a keel can also be directly pressed into a diaphragm.
  • the present invention can also employ a keel in one direction and a corrugated rib in the other direction.
  • the speaker vibration system can be simplified, and the calculation result will be closer to the real situation.
  • the concept of "film” will be weakened, and it should be more accurate to refer to the speaker “vibration” as the speaker “vibration body”. Choosing a lightweight, strong material structure is an important means of improving speaker quality.
  • the main and auxiliary keels of the present invention may be provided on the back surface of the diaphragm or on the front surface of the diaphragm; the main keel and the sub keel may be provided on the same side of the diaphragm, or may be provided on both sides of the diaphragm.
  • the cross section of the keel can be made into various shapes, either hollow or solid; the material of the keel can be the same as or different from the diaphragm.
  • the shape of the diaphragm can be Conical, dome-shaped, elliptical or flat.
  • the direction of the main keel of the present invention may be the same as or different from the normal direction of the voice coil (there may be a certain angle), the keel may be formed together with the diaphragm or may be attached by pasting or other methods; between the main and the auxiliary keels Can be perpendicular to each other or not perpendicular.
  • the length of the keel is the same as the inside of the diaphragm (connected to the voice coil) (connected to the loop). The distance between the loops can be equal or different.
  • the length of each main keel can be equal or different.
  • the cross section of each main keel They may be equal or different, and the sections of different positions of the same main keel may be equal or different.

Landscapes

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

Abstract

La présente invention se rapporte à un haut-parleur et à son diaphragme, en particulier à un diaphragme de haut-parleur qui peut réduire les vibrations divisées, diminuer la distorsion et rendre les vibrations du diaphragme très sensibles au signal excité afin d'atteindre un effet de reproduction de haute-fidélité. Le diaphragme comporte des nervures principales et des sous-nervures. Les nervures principales sont agencées à l'emplacement à partir duquel est relié le diaphragme de haut-parleur à la bobine acoustique, et elles s'étendent le long de la direction radiale du diaphragme. Les sous-nervures sont établies dans la direction qui croise la direction radiale. Les nervures principales sont perpendiculaires au cercle exinscrit de la bobine acoustique et les sous-nervures sont perpendiculaires aux nervures principales. Comparée à la technologie existante, grâce à l'utilisation de la conception des nervures, la présente invention améliore la résistance au flambage du diaphragme, réduit en particulier les vibrations divisées et la distorsion, améliore l'efficacité et la rigidité du diaphragme et permet aux vibrations du diaphragme d'être très sensibles au signal excité. On peut obtenir ainsi un diaphragme de haut-parleur hi-fi comportant un nombre moins important de matériaux onéreux.
PCT/CN2005/000644 2004-10-21 2005-05-10 Diaphragme de haut-parleur WO2006042448A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200410051941.4 2004-10-21
CN 200410051941 CN1764327A (zh) 2004-10-21 2004-10-21 扬声器振膜

Publications (1)

Publication Number Publication Date
WO2006042448A1 true WO2006042448A1 (fr) 2006-04-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2005/000644 WO2006042448A1 (fr) 2004-10-21 2005-05-10 Diaphragme de haut-parleur

Country Status (2)

Country Link
CN (1) CN1764327A (fr)
WO (1) WO2006042448A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2479941A (en) * 2010-04-30 2011-11-02 Gp Acoustics Stiffened loudspeaker diaphragm
US20180103322A1 (en) * 2016-10-11 2018-04-12 YG Acoustics LLC Space frame reinforced tweeter dome

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5088377B2 (ja) * 2008-01-07 2012-12-05 株式会社Ｊｖｃケンウッド スピーカおよび音響システム
CN103096701B (zh) * 2012-12-25 2016-05-04 苏州恒听电子有限公司 一种屏蔽外壳及具有该屏蔽外壳的受话器
CN104883637A (zh) * 2015-04-29 2015-09-02 朝阳聚声泰（信丰）科技有限公司 一种挂耳式耳机
CN107071665A (zh) * 2017-04-28 2017-08-18 北京欧意智能科技有限公司 振膜及全方位发声扬声器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765096A (en) * 1980-10-08 1982-04-20 Matsushita Electric Ind Co Ltd Vibration diaphragm for speaker
JPS6027298A (ja) * 1983-07-25 1985-02-12 Sony Corp スピ−カの振動板
JPS60220699A (ja) * 1984-04-18 1985-11-05 Hitachi Ltd スピ−カ
CN2596705Y (zh) * 2002-12-13 2003-12-31 李慧 仿蜂窝一体成型式音盆

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765096A (en) * 1980-10-08 1982-04-20 Matsushita Electric Ind Co Ltd Vibration diaphragm for speaker
JPS6027298A (ja) * 1983-07-25 1985-02-12 Sony Corp スピ−カの振動板
JPS60220699A (ja) * 1984-04-18 1985-11-05 Hitachi Ltd スピ−カ
CN2596705Y (zh) * 2002-12-13 2003-12-31 李慧 仿蜂窝一体成型式音盆

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2479941A (en) * 2010-04-30 2011-11-02 Gp Acoustics Stiffened loudspeaker diaphragm
US8942407B2 (en) 2010-04-30 2015-01-27 Gp Acoustics (Uk) Limited Loudspeaker and diaphragm therefor
US20180103322A1 (en) * 2016-10-11 2018-04-12 YG Acoustics LLC Space frame reinforced tweeter dome
US10244322B2 (en) * 2016-10-11 2019-03-26 YG Acoustics LLC Space frame reinforced tweeter dome

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