WO2009139044A1 - Matériau de bord pour membrane de micro haut-parleur, micro haut-parleur utilisant le matériau de bord comme membrane de micro haut-parleur, et appareil électronique utilisant le micro haut-parleur - Google Patents

Matériau de bord pour membrane de micro haut-parleur, micro haut-parleur utilisant le matériau de bord comme membrane de micro haut-parleur, et appareil électronique utilisant le micro haut-parleur Download PDF

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Publication number
WO2009139044A1
WO2009139044A1 PCT/JP2008/058754 JP2008058754W WO2009139044A1 WO 2009139044 A1 WO2009139044 A1 WO 2009139044A1 JP 2008058754 W JP2008058754 W JP 2008058754W WO 2009139044 A1 WO2009139044 A1 WO 2009139044A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
elastomer
microspeaker
edge material
micro speaker
Prior art date
Application number
PCT/JP2008/058754
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English (en)
Japanese (ja)
Inventor
山田精吾
Original Assignee
吾妻化成株式会社
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 吾妻化成株式会社 filed Critical 吾妻化成株式会社
Priority to PCT/JP2008/058754 priority Critical patent/WO2009139044A1/fr
Publication of WO2009139044A1 publication Critical patent/WO2009139044A1/fr

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    • 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
    • H04R2307/029—Diaphragms comprising fibres
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the present invention relates to an edge material technology of a micro speaker for an electric-acoustic converter used in an electronic device such as a mobile phone, a portable audio device, or a laptop computer, and in particular, heat resistance, cold resistance, moisture resistance, molding Microspeaker diaphragm edge material excellent in performance and high internal loss, etc., microspeaker using the microspeaker diaphragm edge material, and a mobile phone, a portable acoustic device, or a notebook computer using the microspeaker Relating to electronic devices.
  • PI polyimide
  • PAI polyamideimide
  • PPS polyphenylene sulfide
  • PEI polyetherimide
  • PEN naphthalate
  • PET polyethylene terephthalate
  • PEEK polyetheretherketone
  • a diaphragm also referred to as cone paper
  • an integrally molded product that inseparably functions as both a vibration body forming a diaphragm and an edge portion positioned on the outer periphery of the vibration body is the mainstream.
  • a speaker diaphragm in which a resin film such as polyimide (PI) or polyamideimide (PAI) is integrally formed in a dome shape is disclosed in, for example, Japanese Patent Laid-Open No. 2003-289594 “Speaker diaphragm, polyamide resin and polyimide resin used therefor” (Patent Document 1).
  • PI polyimide
  • PAI polyamideimide
  • FIG. 9, and FIG. 10 are a perspective view of a mobile phone disclosed in Patent Document 1, a structural example of a diaphragm, and a structural diagram of a speaker.
  • FIG. 8 1 is a mobile phone, 2 (4) is a speaker section, and 3 is a microphone section (receiver speaker).
  • FIG. 9 shows an overall view of a diaphragm molded from a polyamideimide (PAI) resin film (or polyimide (PI) resin film).
  • PAI polyamideimide
  • PI polyimide
  • 3 is a diaphragm
  • 3a is a dome part (body) of the diaphragm
  • 3b is a recessed fitting part of the diaphragm
  • 3c is a peripheral part (edge) of the diaphragm
  • 3d is an external pasting part of the diaphragm
  • Reference numeral 5 denotes a speaker voice coil.
  • FIG. 10 is a diagram showing the structure of the speaker unit incorporating the diaphragm 3 shown in FIG.
  • 3 is a diaphragm
  • 3a is a dome part (body) of the diaphragm
  • 3b is a recessed fitting part of the diaphragm
  • 3c is a peripheral part (edge) of the diaphragm
  • 3d is an external pasting part of the diaphragm
  • 5 is a voice coil
  • 7a is an upper magnetic pole plate of the speaker
  • 7b is a lower magnetic pole plate of the speaker
  • 8 is a magnetic gap
  • 9 is an external terminal of the speaker
  • 14 is a magnet of the speaker
  • 15 is a magnetic circuit of the speaker
  • 17 is a frame
  • 26 is a protector.
  • thin film engineering plastics such as polyamide imide (PAI) (or polyimide (PI)) are used as the diaphragm to reduce the weight and weight of the diaphragm in consideration of the efficiency and heat resistance of the speaker.
  • PAI polyamide imide
  • PI polyimide
  • Patent Document 2 discloses a speaker diaphragm having a wide frequency characteristic and a high frequency by lowering the lowest resonance frequency (Fo).
  • a polyimide resin base material provided with an elastomer layer on one or both sides thereof is disclosed.
  • Japanese Patent No. 3996075 “Film for speaker diaphragm” (Patent Document 3) discloses polyetherimide. What provided the resin coating layer on the single side
  • edge material of the diaphragm for microspeakers is to suppress the divided vibration from the diaphragm and stabilize the frequency characteristics.Viscoelasticity, considering various usage environments of electronic devices such as mobile phones to be incorporated Various physical properties such as high internal loss, high stress, heat resistance, cold resistance, flexibility, moldability for mass production, shape retention, etc. are required. It did not meet the requirements of.
  • the object of the present invention is to use a diaphragm edge material for a micro speaker and a diaphragm edge material for the micro speaker that are particularly excellent in heat resistance, cold resistance, moisture resistance, moldability, and high internal loss. And providing an electronic device such as a mobile phone, a portable audio device, or a notebook computer using the micro speaker.
  • a diaphragm edge material for a microspeaker according to the present invention comprises a polyester-based elastomer resin containing a substance having the chemical structural formula shown in (Chemical Formula 1) of Example 1 and having a tan ⁇ value of 0.02 or more at room temperature. It is characterized by using a polyester elastomer sheet formed into a sheet.
  • an elastomer resin different from the polyester elastomer resin is internally added to the polyester elastomer resin, or one or both sides of the polyester elastomer sheet formed with the polyester elastomer resin or two sheets of the polyester It is characterized in that an elastomer resin layer different from the polyester elastomer resin is added between the elastomer elastomer sheets.
  • the elastomer resin different from the polyester elastomer resin is a urethane elastomer, a silicon elastomer, a styrene elastomer, or EVA (ethylene / vinyl acetate polymer).
  • micro speaker according to the present invention is characterized by using the above-described diaphragm edge material for a micro speaker
  • the electronic device according to the present invention is characterized by using the micro speaker.
  • the diaphragm edge material for a microspeaker of the present invention is excellent in heat resistance, cold resistance, moisture resistance, moldability, high internal loss, and the like due to the adoption of the above configuration.
  • a microspeaker or the microspeaker is incorporated into an electronic device such as a mobile phone, a portable audio device, or a notebook personal computer, so that a microspeaker or an electronic device having excellent characteristics can be realized.
  • FIG. 1 is a view for explaining the configuration of a diaphragm edge material for a micro speaker according to the present invention.
  • FIG. 2 is a view for explaining an example of a diaphragm according to the present invention (part 1).
  • FIG. 3 is a view for explaining an example of a diaphragm according to the present invention (part 2).
  • FIG. 4 is a view for explaining an example of a diaphragm according to the present invention (part 3).
  • FIG. 5 is a view for explaining another example of the diaphragm according to the present invention (part 1).
  • FIG. 6 is a view for explaining another example of the diaphragm according to the present invention (part 2).
  • FIG. 1 is a view for explaining the configuration of a diaphragm edge material for a micro speaker according to the present invention.
  • FIG. 2 is a view for explaining an example of a diaphragm according to the present invention (part 1).
  • FIG. 3 is a view for
  • FIG. 7 is a structural diagram of a micro speaker using the diaphragm of FIG.
  • FIG. 8 is a perspective view of a conventional mobile phone.
  • FIG. 9 is a diagram showing a diaphragm in the prior art.
  • FIG. 10 is a structural diagram of a speaker in the prior art.
  • Mobile phone 2 Speaker using diaphragm 20: Highly elastic material (paper, engineering plastic film, or light metal sheet such as aluminum or magnesium)
  • 30 Diaphragm edge material for a micro speaker 3a, 30a: Dome part (body) of the diaphragm 3b, 30b: concave fitting portion of diaphragm 3c, 30c: peripheral edge (edge) of diaphragm 3d, 30d: External pasting part of diaphragm 300: Diaphragm 4: Micro speaker using diaphragm 5: Voice coil 7a: Upper magnetic pole plate of speaker 7b: Lower magnetic pole plate of speaker 8: Magnetic gap 9: Outside of speaker Terminal 10: Gasket 14: Magnet of speaker 15: Magnetic circuit of speaker 17: Frame 26: Protector A: Polyester elastomer B: Functional elastomer (urethane elastomer, silicone elastomer, styrene elastomer, EVA (ethylene / vinyl acetate) Polymer))
  • Example 1 The present invention contains at least 50% or more of a substance having the chemical structural formula shown below (Chemical Formula 1) and has a loss tangent tan ⁇ value of 0.02 or more at room temperature (eg, 5 ° C. to 35 ° C.)
  • a polyester elastomer sheet is produced by forming a polyester elastomer sheet using a ceramic elastomer resin, and the polyester elastomer sheet is molded by a hot press to obtain a diaphragm edge material for a micro speaker.
  • Example 1 of the present invention a polyester elastomer sheet having good characteristics is produced using a material having an appropriate thickness (for example, 10 ⁇ to 60 ⁇ ) of a polyester elastomer resin having the above composition, and is molded by a hot press.
  • a diaphragm edge material for a micro speaker is obtained.
  • a diaphragm edge material for a microspeaker having excellent characteristics such as heat resistance, cold resistance, moisture resistance, moldability, and high internal loss as compared with the prior art can be obtained.
  • Example 2 In Example 2 of the present invention, as shown in FIG. 1 (b), a functional elastomer resin (urethane elastomer, silicon elastomer, styrene elastomer) is placed inside the polyester elastomer A having the contents described in Example 1 above.
  • a functional elastomer resin urethane elastomer, silicon elastomer, styrene elastomer
  • a polyester-based elastomer sheet having good characteristics is prepared and molded by a hot press to obtain a diaphragm edge material for a micro speaker.
  • Example 3 the polyester-based elastomer sheet (10 ⁇ to 60 ⁇ ) A having the contents described in Example 1 above is further provided on one side (see FIG. 1 (c)) or both sides (see FIG. 1 (d)).
  • Functional elastomer resin urethane elastomer, silicon elastomer, styrene elastomer, EVA (ethylene / vinyl acetate polymer), etc.
  • These multi-layered materials are molded by a hot press, and are adapted to a diaphragm edge material for a micro speaker.
  • Example 4 In Example 4 of the present invention, as shown in FIG. 1 (e), a functional elastomer resin (between two polyester-based elastomer sheets (10 ⁇ to 60 ⁇ ) A having the contents described in Example 1 above is provided.
  • a functional elastomer resin between two polyester-based elastomer sheets (10 ⁇ to 60 ⁇ ) A having the contents described in Example 1 above is provided.
  • a urethane elastomer, silicon elastomer, styrene elastomer, or EVA (ethylene / vinyl acetate polymer) B to make it multilayer, it can be adjusted to meet the requirements of more appropriate physical properties.
  • These multi-layered materials are molded by a hot press, and are adapted to a diaphragm edge material for a micro speaker.
  • a polyester elastomer resin containing 50% or more of the polyester resin having the chemical structural formula (Chemical Formula 1) (10 ⁇ to 60 ⁇ ) or the polyester elastomer resin Functional elastomers (urethane elastomer, silicon elastomer, styrene elastomer, EVA (ethylene / vinyl acetate polymer), etc.) may be added internally, or one or both sides or two of the polyester elastomer resin.
  • An elastomer sheet made by adding a functional elastomer layer (urethane-based elastomer, silicon-based elastomer, styrene-based elastomer, EVA (ethylene / vinyl acetate polymer), etc.) between these polyester-based elastomers is heated.
  • a functional elastomer layer urethane-based elastomer, silicon-based elastomer, styrene-based elastomer, EVA (ethylene / vinyl acetate polymer), etc.
  • a polyester elastomer alone containing 50% or more of a polyester resin having the chemical structural formula can lower f 0 significantly compared to conventional super engineering plastics.
  • functional elastomers urethane elastomers, silicone elastomers, styrene elastomers, EVA (ethylene / vinyl acetate polymer), etc.
  • EVA ethylene / vinyl acetate polymer
  • a polyester elastomer alone containing 50% or more of a polyester resin having the chemical structural formula of (Chemical Formula 1) can significantly lower the Q value compared to a conventional super engineering plastic.
  • an elastomer layer (urethane elastomer, silicone elastomer, styrene elastomer, EVA (ethylene / vinyl acetate polymer), etc.) on both sides, it is possible to give more effects.
  • (G) Molding mass productivity A polyester elastomer containing 50% or more of a polyester resin having the chemical structural formula of (Chemical Formula 1) is a super engineering plastic molding temperature (180-250 ° C.) that is currently used in micro speaker diaphragms. ) Low temperature molding (120 ° C to 150 ° C) is possible, and mass productivity is excellent.
  • Example 5 an embodiment in which the diaphragm edge material for a micro speaker having the above-described excellent characteristics is used for a micro speaker will be described with reference to the drawings.
  • 2 and 3 are diagrams for explaining an example of the diaphragm according to the present invention.
  • 20 is a highly elastic material (paper, engineering plastic film, or light metal sheet such as aluminum or magnesium), and 30 is a diaphragm edge material for a micro speaker described in the above embodiment according to the present invention. .
  • the diaphragm edge material 30 for a micro speaker has a ring shape, and is integrally molded after being aligned so that the outer peripheral portion thereof overlaps the inner peripheral portion of the highly elastic material 20.
  • the highly elastic material 20 mainly forms the dome portion or body portion of the diaphragm, and the diaphragm edge material 30 for the microspeaker is aligned and integrated so as to mainly form the peripheral edge or edge portion of the diaphragm. Molded and attached to a microspeaker.
  • At least one of the highly elastic material 20 and the diaphragm edge material 30 for the microspeaker is provided with an adhesive function in advance (adhesive material may be applied, or characteristics of a material that causes an adhesive action during integral molding may be used).
  • adhesive material may be applied, or characteristics of a material that causes an adhesive action during integral molding may be used.
  • the highly elastic material 20 and the diaphragm member 30 for microspeaker are bonded and molded to produce a diaphragm for microspeaker with a free edge specification.
  • FIG. 3 is a configuration diagram when the diaphragm manufactured by simultaneous molding as described above is attached to the voice coil of the micro speaker.
  • FIG. 3 shows an example in which the diaphragm edge material 30 for microspeaker is placed on the highly elastic material 20, but conversely, the diaphragm edge material 30 for microspeaker is made of a highly elastic material as shown in FIG. It is also possible to be below 20.
  • Whether to make it as shown in FIG. 3 or as shown in FIG. 4 is a matter determined in consideration of the structure of the micro speaker. Needless to say, the shape of the molding in the case of integral molding should be an optimum shape according to that.
  • FIG. 5 and 6 are diagrams showing another example of the diaphragm according to the present invention.
  • 20 is a highly elastic material (paper, engineering plastic film, or light metal sheet such as aluminum or magneto)
  • 30 is a diaphragm edge material for a micro speaker
  • the high elastic material 20 is used for a micro speaker.
  • the highly elastic material 20 is aligned on the sheet of the diaphragm edge member 30 so as to be positioned at the position of the diaphragm dome, that is, the body (usually the center), and integrally molded.
  • the highly elastic material 20 forms the dome portion, that is, the body portion of the diaphragm
  • the diaphragm edge material 30 for the microspeaker includes both the dome portion, that is, the body portion of the diaphragm, and the peripheral portion, that is, the edge portion of the diaphragm. Will be formed.
  • the dome portion of the diaphragm is formed by a portion where the high elastic material 20 and the diaphragm edge material 30 for the micro speaker overlap, and the peripheral edge portion of the diaphragm is formed only by the diaphragm edge material 30 for the micro speaker.
  • At least one of the highly elastic material 20 and the diaphragm edge member 30 for microspeakers is provided with an adhesive function in advance (adhesive material may be applied, or the characteristics of the material that causes an adhesive action during integral molding are utilized.
  • adhesive material may be applied, or the characteristics of the material that causes an adhesive action during integral molding are utilized.
  • the high elastic material 20 and the diaphragm edge material 30 for microspeaker are bonded and integrally molded, and a diaphragm for microspeaker is manufactured with a free edge specification.
  • 6 and 7 are diagrams showing the diaphragm manufactured as described above and a micro speaker using the diaphragm.
  • 300 is a diaphragm produced by bonding and molding the highly elastic material 20 and the diaphragm edge material 30 for the microspeaker as described in FIG. 1, and 30a is a dome portion (body) of the diaphragm, 30b. Is a recessed fitting portion of the diaphragm, 30c is a peripheral edge (edge) of the diaphragm, and 30d is an external attachment portion of the diaphragm.
  • the dome portion (body) 30a of the diaphragm is formed by laminating the highly elastic material 20 and the diaphragm edge material 30 for the micro speaker, and the peripheral edge (edge) 30c of the diaphragm and the external pasting portion 30d of the diaphragm are It is formed only with the diaphragm edge material 30 for microspeakers.
  • Reference numeral 5 denotes a speaker voice coil.
  • the microspeaker diaphragm edge member 30 is attached so that the sheet side is in contact with the voice coil 5.
  • FIG. 7 is a diagram showing the structure of the speaker unit incorporating the diaphragm 300 shown in FIG.
  • 30 is a vulcanized rubber
  • 30a is a dome part (body) of the diaphragm
  • 30b is a recessed fitting part of the diaphragm
  • 30c is a peripheral part (edge) of the diaphragm
  • 30d is an external pasting part of the diaphragm
  • 4 is a speaker using a diaphragm (corresponding to the speaker 2 in FIG.
  • 5 is a voice coil
  • 7a is an upper magnetic pole plate of the speaker
  • 7b is a lower magnetic pole plate of the speaker
  • 8 is a magnetic gap
  • 9 is an external terminal of the speaker
  • Reference numeral 10 denotes a gasket
  • 14 denotes a speaker magnet
  • 15 denotes a speaker magnetic circuit
  • 17 denotes a frame
  • 26 denotes a protector. 7 is different from FIG. 10 in the portion of the diaphragm, and the configuration other than the diaphragm 30 is the same as that in FIG.
  • the diaphragm edge material for a micro speaker according to the present invention is excellent in characteristics, and is an electro-acoustic converter for any electronic device that requires a speaker, such as an electronic device such as a mobile phone, a portable audio device, or a notebook computer. It can also be used as an edge material for microspeakers.

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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 matériau de bord pour des membranes de micro haut-parleur dont la résistance à la chaleur, la résistance au froid, la résistance à l'humidité, l’aptitude au moulage, les pertes internes, etc. sont améliorées. Le matériau de bord pour des membranes de micro haut-parleur est obtenu par formage à chaud d'une feuille d’élastomère. La feuille d’élastomère est une feuille réalisée uniquement en un élastomère de polyester comprenant une résine de polyester présentant la formule structurelle donnée ci-dessous [formule chimique (1)] ou en un mélange de l'élastomère de polyester et d'un élastomère fonctionnel tel qu'un élastomère d'uréthane en tant qu'additif interne, ou est une feuille obtenue en disposant l'élastomère fonctionnel sur un côté ou chaque côté d'une feuille de l'élastomère de polyester ou entre deux feuilles de l'élastomère de polyester.
PCT/JP2008/058754 2008-05-13 2008-05-13 Matériau de bord pour membrane de micro haut-parleur, micro haut-parleur utilisant le matériau de bord comme membrane de micro haut-parleur, et appareil électronique utilisant le micro haut-parleur WO2009139044A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/058754 WO2009139044A1 (fr) 2008-05-13 2008-05-13 Matériau de bord pour membrane de micro haut-parleur, micro haut-parleur utilisant le matériau de bord comme membrane de micro haut-parleur, et appareil électronique utilisant le micro haut-parleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/058754 WO2009139044A1 (fr) 2008-05-13 2008-05-13 Matériau de bord pour membrane de micro haut-parleur, micro haut-parleur utilisant le matériau de bord comme membrane de micro haut-parleur, et appareil électronique utilisant le micro haut-parleur

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WO2009139044A1 true WO2009139044A1 (fr) 2009-11-19

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PCT/JP2008/058754 WO2009139044A1 (fr) 2008-05-13 2008-05-13 Matériau de bord pour membrane de micro haut-parleur, micro haut-parleur utilisant le matériau de bord comme membrane de micro haut-parleur, et appareil électronique utilisant le micro haut-parleur

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62108699A (ja) * 1985-11-06 1987-05-19 Onkyo Corp スピ−カ用エツジ
JPH05328490A (ja) * 1992-05-22 1993-12-10 Taisei Plus Kk スピーカー用コーンの製造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62108699A (ja) * 1985-11-06 1987-05-19 Onkyo Corp スピ−カ用エツジ
JPH05328490A (ja) * 1992-05-22 1993-12-10 Taisei Plus Kk スピーカー用コーンの製造方法

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