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WO2006114980A1 - Diaphragme pour haut-parleur, son procede de production, haut-parleur utilisant un tel diaphragme et appareil utilisant un tel diaphragme - Google Patents

Diaphragme pour haut-parleur, son procede de production, haut-parleur utilisant un tel diaphragme et appareil utilisant un tel diaphragme Download PDF

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Publication number
WO2006114980A1
WO2006114980A1 PCT/JP2006/306627 JP2006306627W WO2006114980A1 WO 2006114980 A1 WO2006114980 A1 WO 2006114980A1 JP 2006306627 W JP2006306627 W JP 2006306627W WO 2006114980 A1 WO2006114980 A1 WO 2006114980A1
Authority
WO
WIPO (PCT)
Prior art keywords
resin
speaker
aramid fiber
diaphragm
diaphragm according
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2006/306627
Other languages
English (en)
Japanese (ja)
Inventor
Yoshimichi Kajihara
Masaki Suzumura
Shinya Mizone
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to CN2006800016253A priority Critical patent/CN101091413B/zh
Publication of WO2006114980A1 publication Critical patent/WO2006114980A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/025—Diaphragms comprising polymeric materials
    • 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
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • 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

Definitions

  • the present invention relates to a speaker diaphragm used in various audio equipment and video equipment, a manufacturing method thereof, and a speaker using the same. Furthermore, the present invention relates to a stereo set using this speaker, a television set, a device such as an automobile.
  • FIG. 6 is a cross-sectional view of a diaphragm for a speaker made of resin by conventional injection molding.
  • Diaphragm 16 is made by injection molding using a resin such as polypropylene and heat-melting the resin pellet in a mold whose shape is set in advance.
  • a resin material used for injection molding a single material such as polypropylene is generally often used.
  • a blend type diaphragm 16 formed using different types of resin for the purpose of adjusting the physical property values of the diaphragm 16, that is, adjusting the characteristics and sound quality as a speaker.
  • the reinforcing material such as My Power is mixed and adjusted in the resin material to adjust the characteristics and sound quality of the speaker. Yes.
  • a diaphragm is disclosed in, for example, JP-A-2-228197.
  • paper diaphragm vibration resin diaphragms are the mainstream, and each feature is used and divided according to its application while energizing each feature.
  • a resin diaphragm obtained by injection molding has excellent moisture resistance, water resistance reliability and dimensional stability, and high productivity.
  • an inorganic filler such as My Power is used to adjust the physical properties, uniform physical properties cannot be secured. For this reason, the adjustment range of the characteristics and sound quality as a speaker is very narrow.
  • the present invention provides a speaker diaphragm capable of ensuring moisture resistance, water resistance reliability and dimensional stability with a large degree of freedom in adjusting the characteristics and sound quality as a speaker, having an excellent appearance, and improving productivity. It is.
  • the speaker diaphragm of the present invention contains a resin, an aramid fiber, and an organosilicon compound that binds the resin and the polyamide fiber. This configuration retains the high elastic modulus and high internal loss that are the characteristics of aramid fibers, increasing the degree of freedom in setting the physical properties of the diaphragm, ensuring moisture resistance reliability and strength, and excellent appearance.
  • a diaphragm can be obtained. Brief Description of Drawings
  • FIG. 1A is a cross-sectional view of a speaker diaphragm in an embodiment of the present invention.
  • FIG. 1B is a conceptual enlarged cross-sectional view of the diaphragm shown in FIG. 1A.
  • FIG. 2 is a plan view of the diaphragm shown in FIG. 1A.
  • FIG. 3 is a cross-sectional view of the speaker in the embodiment of the present invention.
  • FIG. 4 is an external view of a minicomponent system in an embodiment of the present invention.
  • FIG. 5 is a sectional view of the automobile in the embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of a conventional speaker diaphragm.
  • FIG. 1A is a sectional view of a speaker diaphragm according to an embodiment of the present invention
  • FIG. 1B is an enlarged sectional view of the same concept
  • Fig. 2 is a plan view of the same.
  • Diaphragm 1 is configured by injection molding a material in which resin 1A is mixed with aramid fiber 1B, and resin 1A and aramid fiber 1B are firmly bonded with organic silicon compound 1C. That is, diaphragm 1 includes resin 1A, aramid fiber 1B, and organosilicon compound 1C that binds resin 1A and aramid fiber 1B. Mu
  • the binding force between the resin 1A and the aramid fiber IB is increased, and the adhesion between the two is improved.
  • energy loss in the diaphragm 1 is reduced, and the characteristics of the aramid fiber 1B are utilized more effectively, and a diaphragm having high strength and high elastic modulus can be obtained.
  • the adhesion between the two is further improved.
  • Crystalline or amorphous olefin fin resin is preferably used as the resin 1A. Formability is improved by using olefin resin. In addition, by using and separating crystalline resinous material and amorphous resin material according to the application, it is possible to satisfy the optimum physical property values as the resinous material.
  • the organosilicon compound 1C a so-called aminosilane coupling agent or a hydrolyzable long-chain alkylsilane having 6 or more carbon atoms can be used. Among these, it is preferable to use an organosilicon compound having an amino group. By mixing such an organosilicon compound 1C, the resin 1A and the aramide fiber 1B are more firmly bound. As a result, the physical properties of the aramid fiber 1B function effectively, and the diaphragm 1 having a higher elastic modulus can be obtained.
  • 3-aminopropyltriethoxysilane, N-2 (aminoethinole) 3-aminopropyltriethoxysilane, and 3-aminopropyltrimethoxysilane are more effective as the organosilicon compound 1C having an amino group used here. It is.
  • the hydrolyzable long-chain alkylsilane hexyltrimethoxysilane or decyltrimethoxysilane can be used.
  • polypropylene is used for the resin 1A.
  • 90wt% polypropylene and 10wt% aramid fiber with a fiber length of 3mm are granulated and kneaded.
  • 1.5 parts by weight of 3-aminopropyltriethoxysilane as an organosilicon compound 1C is mixed in 100 parts by weight of the kneaded product.
  • the organosilicon compound 1C may be added before kneading the resin 1A and the aramide fiber 1B, or may be added during kneading.
  • the heat granulation is preferable because polypropylene and aramid fiber 1B, which are the resin 1A, are combined, and the familiarity of the resin 1A and the aramid fiber 1B is improved and uniformly dispersed.
  • Pellets are prepared from the kneaded material thus prepared, and the pellets are injection-molded and shaken. Mold moving plate 1. In this way, the diaphragm 1 of sample F is manufactured. Then, after measuring the specific gravity of diaphragm 1, a sample of 32mm x 5mm, which is a part of it, is extracted and the elastic modulus and internal loss are measured. The characteristics of conventional paper or resin, and vibration plates (samples A to E) containing 10 wt% of reinforcing material are measured in the same way, and the results are shown in (Table 1).
  • Internal loss is one of the indices that express the characteristics of the material used for the diaphragm, and represents the ability to dissipate the energy to the outside when kinetic energy such as vibration is applied from the outside. The higher the internal loss, the lower the unnecessary reverberation and the better the sound quality.
  • Polypropylene is generally easily available and injection molding is easy, but the present invention is not limited to this.
  • other types of resin can be used and used freely.
  • high heat resistance and high solvent resistance are required, it is possible to use an engineering plastic that matches the application.
  • the diaphragm 1 using the aramid fiber 1B can reproduce a bright timbre with a clear sense, and can suppress dark and uniform timbre peculiar to fat.
  • a reinforcing material may be mixed.
  • My strength, graphite, talc and cellulose fiber can be used.
  • the elastic modulus can be increased by mixing My Strength into the reinforcing material. If you add Graphite, Increases efficiency and internal loss. Inclusion of talc can increase internal loss.
  • a tough fiber such as carbon fiber may be used as the fiber.
  • a fluidity modifier may also be mixed.
  • a modifying material for example, a flowable powdered calcium stearate can be used.
  • a fatty acid having an amino group is preferred because a thin and light diaphragm 1 highly filled with aramid fiber 1B can be obtained by injection molding.
  • stearic acid amide or oleic acid amide can be used.
  • Table 2 shows the results of comparing the fluidity (Ml) when stearic acid amide is mixed as a fluidity modifier and when it is not mixed. Evaluation is being carried out in accordance with IS K7210
  • the parameters of the components other than the diaphragm 1 among the components of the speaker are fixed.
  • the parameters that can be changed in the diaphragm 1 are area, shape, weight, surface thickness, etc., other than the physical property values.
  • the area, shape, weight, and surface thickness of diaphragm 1 are almost determined at the initial stage of speaker design. That is, the sound pressure frequency characteristic and sound quality of the speaker are roughly determined by conditions other than the physical property value of diaphragm 1.
  • diaphragm materials can be selected according to the following procedure.
  • a material that can satisfy the sound pressure frequency characteristics, sound quality, and reliability grade required for the speaker is selected as resin 1A, aramid fiber IB, and other mixed materials.
  • the base resin 1A is selected with a particular emphasis on reliability such as its heat-resistant grade, and a material whose specific tone is close to the specified tone is selected.
  • each material is selected for an unnecessary peak or dip in the sound pressure frequency characteristic to be deleted.
  • select a material that has internal loss at that frequency select a material that has internal loss at that frequency.
  • the density, elastic modulus, internal loss, timbre, resonance frequency when molded into the shape of diaphragm 1, etc. are taken into account for resin 1A, aramid fiber 1B, and other mixed materials. Select while.
  • the physical property values and the like of the diaphragm 1 obtained in this way are measured and evaluated.
  • the speaker 1 is prototyped using the diaphragm 1, the characteristics and sound quality are actually measured, and the final audition is performed. If the evaluation does not provide the desired characteristics and sound quality, repeat this prototype process many times. In the process, we will improve the selection of materials and their blending ratio, and gradually bring them closer to the target characteristics and sound quality.
  • the fiber length of the aramid fiber 1B is shorter than 0.3 mm, the effect of the aramid fiber 1B cannot be obtained efficiently and a high elastic modulus cannot be expected.
  • the length is longer than 6 mm, poor dispersion tends to occur due to secondary aggregation resulting from entanglement between the polyamide fibers 1B. For this reason, it takes a long time to knead the resin 1A.
  • agglomerates of aramid fiber 1B appear on the surface of diaphragm 1 and the appearance is impaired. Thus, productivity and quality are reduced.
  • the diaphragm 1 is composited with an aramid fiber of 3 mm or less. If the fiber length is longer than this, it will be difficult to form the diaphragm 1 thinly.
  • the mixing ratio of the aramid fiber 1B to the resin 1A is preferably 5% or more and 50% or less.
  • the diaphragm 1 by configuring the diaphragm 1 by injection molding the material in which the resin 1A and the aramide fiber IB are mixed, the degree of freedom in setting the physical properties of the diaphragm 1 is increased. That is, vibration plate 1 having high elastic modulus and high internal loss, which are the characteristics of aramid fiber 1B, and excellent in moisture resistance reliability and appearance can be obtained. By producing such a diaphragm 1 by injection molding, productivity and dimensional stability are also improved.
  • the fusion of the resin 1A and the aramid fiber 1B is generally very difficult to laminate, and then a diaphragm is formed by hot pressing.
  • the diaphragm 1 can be reduced in thickness and durability can be secured by binding both of them together with the organosilicon compound 1C.
  • the vibration plate 1 can be molded by injection molding, which improves productivity.
  • the diaphragm 1 may be formed by pressing a sheet made by a solution casting method using a material such as PP resin aramide fiber with a die with vertical force. If the vibration plate 1 is thin while being pressed, it is preferable to apply injection molding to cause distortion.
  • the thickness can be made 0.2 mm or more and 0.5 mm or less, more preferably 0.2 mm or more and 0.3 mm or less even by injection molding.
  • FIG. 3 is a cross-sectional view of the speaker in the present embodiment.
  • an inner magnet type magnetic circuit 5 is configured by sandwiching a magnet 2 in which an upper plate 3 and a yoke 4 are magnetized.
  • the frame 7 is coupled to the yoke 4 of the magnetic circuit 5.
  • the periphery of the diaphragm 1 is bonded (adhered) to the peripheral edge of the frame 7 via an edge 9.
  • one end of the voice coil 8 is coupled to the central portion of the diaphragm 1, and the opposite end of the voice coil 8 is coupled so as to fit into the magnetic gear 6 of the magnetic circuit 5. That is, the voice coil 8 is coupled to the diaphragm 1 and is disposed within a range of action of magnetic flux generated from the magnetic circuit 5.
  • the speaker 10 having a high elastic modulus and a high internal loss which is a feature of the aramid fiber 1B, which has a large degree of freedom in adjusting characteristics and sound quality, can be obtained.
  • the speaker 10 can ensure moisture resistance reliability and strength, has an excellent appearance, and has high productivity.
  • the speaker 10 having the inner magnet type magnetic circuit 5 has been described.
  • the present invention is not limited to this, and the present invention may be applied to a speaker having an outer magnet type magnetic circuit.
  • FIG. 4 is an external view of an audio minicomponent system that is an electronic device according to the present embodiment.
  • the speaker 10 is incorporated in an enclosure 11 to constitute a speaker system 21.
  • the amplifier 12 includes an amplification circuit for an electric signal input to the speaker system 21.
  • An operation unit 13 such as a player outputs a source input to the amplifier 12.
  • the audio mini-component system 14 that is an electronic device includes the amplifier 12, the operation unit 13, and the speaker system 21.
  • the amplifier 12, the operation unit 13, and the enclosure 11 are the main parts of the mini component system 14. That is, the speaker 10 is attached to the main body of the mini component system 14.
  • the voice coil 8 of the speaker 10 is supplied with power from the amplifier 12 of the main body and emits sound from the diaphragm 1. This configuration provides a mini component system 14 that enables highly accurate characteristics, sounds, and designs that could not be realized in the past.
  • the audio mini-component system 14 has been described as an application of the speaker 10 to a device, the present invention is not limited to this. It can also be applied to portable portable audio devices and their charging systems. Furthermore, it can be widely applied and deployed in video equipment such as liquid crystal televisions and plasma display televisions, information communication equipment such as mobile phones, and electronic equipment such as computer-related equipment.
  • FIG. 5 is a cross-sectional view of an automobile 15 which is a device (device) in the embodiment of the present invention.
  • the automobile 15 includes a body 55, a seat 58, a drive unit 53, a steering 54, a front wheel 56, and a rear wheel 57.
  • the seat 58 and the steering 54 are installed in a vehicle compartment provided in the body 55, and the drive unit 53 is installed in a machine compartment provided in the body 55.
  • the steering 54 operates a front wheel 56 that is a steering wheel.
  • the drive unit 53 includes an engine and a motor, and drives a rear wheel 57 that is a drive wheel.
  • the driving unit 53 may drive the front wheels 56.
  • the front wheel 56 and the rear wheel 57 support the body 55.
  • the rear tray 51 provided inside the body 55 of the automobile 50 incorporates the speaker 10 and is used as a part of the car audio. This In the configuration, the speaker 10 is mounted on the automobile 15 that is the main body, and the voice coil 8 of the speaker 10 is supplied with power from the automobile 15 that is the main body and emits sound from the diaphragm 1.
  • the speaker 10 may be incorporated in the front panel 52 and used as a part of car navigation or audio.
  • the speaker diaphragm according to the present invention and the speaker using the diaphragm can be applied to electronic devices such as audiovisual equipment and information communication equipment that require high-precision characteristics and sound creation, and further to devices such as automobiles. .

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

L'invention concerne un diaphragme pour haut-parleur contenant une résine, une fibre d'aramide et un composé d'organosilicone pour lier la résine à la fibre d'aramide. Avec une telle constitution, le diaphragme peut conserver un module d'élasticité élevé et une perte interne élevée qui sont caractéristiques des fibres d'aramide. Par conséquent, le diaphragme possède un meilleur degré de liberté dans l'ajustement de la valeur physique tout en assurant une fiabilité de résistance à l'humidité et une puissance. Un tel diaphragme est également excellent du point de vue de l'aspect.
PCT/JP2006/306627 2005-04-20 2006-03-30 Diaphragme pour haut-parleur, son procede de production, haut-parleur utilisant un tel diaphragme et appareil utilisant un tel diaphragme Ceased WO2006114980A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2006800016253A CN101091413B (zh) 2005-04-20 2006-03-30 扬声器用振动膜及其制造方法、使用该振动膜的扬声器及使用该扬声器的设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005122072 2005-04-20
JP2005-122072 2005-04-20

Publications (1)

Publication Number Publication Date
WO2006114980A1 true WO2006114980A1 (fr) 2006-11-02

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PCT/JP2006/306627 Ceased WO2006114980A1 (fr) 2005-04-20 2006-03-30 Diaphragme pour haut-parleur, son procede de production, haut-parleur utilisant un tel diaphragme et appareil utilisant un tel diaphragme

Country Status (2)

Country Link
CN (2) CN101091413B (fr)
WO (1) WO2006114980A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008124961A (ja) * 2006-11-15 2008-05-29 Matsushita Electric Ind Co Ltd スピーカ用抄紙振動板およびこれを用いたスピーカならびにこのスピーカを用いた電子機器および装置
JP2008193372A (ja) * 2007-02-05 2008-08-21 Matsushita Electric Ind Co Ltd スピーカ用振動板およびこれを用いたスピーカならびにこのスピーカを用いた電子機器および装置
JP2008193370A (ja) * 2007-02-05 2008-08-21 Matsushita Electric Ind Co Ltd スピーカ用振動板およびこれを用いたスピーカならびにこのスピーカを用いた電子機器および装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101091413B (zh) * 2005-04-20 2012-10-17 松下电器产业株式会社 扬声器用振动膜及其制造方法、使用该振动膜的扬声器及使用该扬声器的设备
JP7263358B2 (ja) * 2018-07-27 2023-04-24 ヤマハ株式会社 スピーカ用振動板及びスピーカ用振動板の製造方法

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS5871797A (ja) * 1981-10-23 1983-04-28 Pioneer Electronic Corp 音響機器用成形材料
JPS62205147A (ja) * 1986-03-05 1987-09-09 Chisso Corp 音響振動板及び音響振動板用ポリプロピレン組成物
JPH02293000A (ja) * 1989-05-02 1990-12-04 Dainichi Kasei Kogyo Kk 音響機器用振動板
JPH06178385A (ja) * 1992-12-10 1994-06-24 Nippon Petrochem Co Ltd 電気音響変換器
JP2001268686A (ja) * 2000-03-23 2001-09-28 Idemitsu Petrochem Co Ltd 電気音響変換器用振動板およびその製造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1036577C (zh) * 1993-01-08 1997-12-03 中国科学院青海盐湖研究所 萃取法制取硫酸钾工艺
CN101091413B (zh) * 2005-04-20 2012-10-17 松下电器产业株式会社 扬声器用振动膜及其制造方法、使用该振动膜的扬声器及使用该扬声器的设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5871797A (ja) * 1981-10-23 1983-04-28 Pioneer Electronic Corp 音響機器用成形材料
JPS62205147A (ja) * 1986-03-05 1987-09-09 Chisso Corp 音響振動板及び音響振動板用ポリプロピレン組成物
JPH02293000A (ja) * 1989-05-02 1990-12-04 Dainichi Kasei Kogyo Kk 音響機器用振動板
JPH06178385A (ja) * 1992-12-10 1994-06-24 Nippon Petrochem Co Ltd 電気音響変換器
JP2001268686A (ja) * 2000-03-23 2001-09-28 Idemitsu Petrochem Co Ltd 電気音響変換器用振動板およびその製造方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008124961A (ja) * 2006-11-15 2008-05-29 Matsushita Electric Ind Co Ltd スピーカ用抄紙振動板およびこれを用いたスピーカならびにこのスピーカを用いた電子機器および装置
JP2008193372A (ja) * 2007-02-05 2008-08-21 Matsushita Electric Ind Co Ltd スピーカ用振動板およびこれを用いたスピーカならびにこのスピーカを用いた電子機器および装置
JP2008193370A (ja) * 2007-02-05 2008-08-21 Matsushita Electric Ind Co Ltd スピーカ用振動板およびこれを用いたスピーカならびにこのスピーカを用いた電子機器および装置

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CN101091413A (zh) 2007-12-19
CN101091413B (zh) 2012-10-17
CN2884766Y (zh) 2007-03-28

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