WO2010010701A1 - スピーカ用振動板、スピーカ、スピーカ用振動板の製造方法 - Google Patents
スピーカ用振動板、スピーカ、スピーカ用振動板の製造方法 Download PDFInfo
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- WO2010010701A1 WO2010010701A1 PCT/JP2009/003453 JP2009003453W WO2010010701A1 WO 2010010701 A1 WO2010010701 A1 WO 2010010701A1 JP 2009003453 W JP2009003453 W JP 2009003453W WO 2010010701 A1 WO2010010701 A1 WO 2010010701A1
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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
- 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
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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
- 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
- H04R2307/021—Diaphragms comprising cellulose-like materials, e.g. wood, paper, linen
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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
- 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
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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
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
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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
- H04R7/12—Non-planar diaphragms or cones
Definitions
- the present invention relates to a speaker diaphragm used in various audio equipment and video equipment, a speaker, a method of manufacturing the speaker diaphragm, an electronic device such as a stereo set and a television set, and a mobile device such as an automobile.
- the conventional papermaking diaphragm is not rigid enough, it is difficult for the sound quality in the high sound range to sufficiently reproduce the high sound quality of the digital device.
- the manufacturing of the papermaking diaphragm requires a large number of processes, it accounts for a large portion of the manufacturing cost of the speaker. In particular, with the trend of falling prices of digital equipment, there has been a strong desire to reduce the manufacturing cost of this papermaking diaphragm.
- Patent Literature 1 and Patent Literature 2 are known as literature information of these prior arts.
- the speaker diaphragm of the present invention is manufactured by a papermaking method and uses at least 5 wt% of fibers extracted from bamboo leaves.
- the fiber (pulp) extracted from the silicon dioxide compound in the plant which is abundant in bamboo leaves including bamboo shoots, is used for the papermaking diaphragm, thereby improving the rigidity of the papermaking diaphragm and
- the sound pressure can be improved in the high sound range and the reproduction band can be expanded, and a good sound quality can be realized.
- the present invention can provide a papermaking diaphragm for a speaker that is inexpensive and does not place a burden on the global environment.
- the speaker diaphragm manufacturing method of the present invention includes a beating process for beating pulp, a mixing process for mixing materials containing cellulose such as bamboo fibers, and a paper making process for making a diaphragm shape. And a drying step of drying the diaphragm, wherein the water dispersible polyisocyanate is further mixed in the mixing step.
- the speaker diaphragm includes a cellulose component of a natural fiber such as bamboo fiber and an isocyanate component, and the cellulose component of the natural fiber is cross-linked by the isocyanate component, thereby realizing a high-quality speaker diaphragm. Further, the step of impregnating with polyisocyanate after the paper making process can be omitted, and the production cost can be reduced.
- FIG. 1 is a cross-sectional view of the speaker diaphragm according to Embodiment 1 of the present invention.
- FIG. 2 is a flowchart showing a method for manufacturing the speaker diaphragm in accordance with the second exemplary embodiment of the present invention.
- FIG. 3 is a cross-sectional view of the speaker according to Embodiment 3 of the present invention.
- FIG. 4 is an external view of an audio electronic device according to Embodiment 4 of the present invention.
- FIG. 5 is a cross-sectional view of the moving device according to the fifth embodiment of the present invention.
- FIG. 1 is a cross-sectional view of the speaker diaphragm according to Embodiment 1 of the present invention.
- a diaphragm 27 is a speaker diaphragm manufactured by a paper making method using at least 5 wt% of fibers extracted from bamboo leaves. Natural fibers with high rigidity are rich in silicon dioxide compounds.
- silicon dioxide compounds vary in shape and size depending on the type and part of the plant, the rigidity of the papermaking diaphragm is improved by using fibers (pulp) extracted from the type and part of the plant that contains a large amount of silicon dioxide compound. The sound quality of the speaker diaphragm can be improved.
- silicon dioxide compounds are most abundant in leaf parts in plant parts, and in plant types, abundantly in bamboo containing bamboo shoots, so the fiber (pulp) extracted from the bamboo leaves is subjected to papermaking vibration. A big effect is acquired by using for a board.
- the fiber (pulp) extracted from the bamboo leaf is beaten with at least a biaxial kneader from the viewpoint of industrial stability.
- the biaxial kneader is not particularly limited as long as it can apply a large shearing force to bamboo leaves, but a device such as a two-roller or a pressure kneader is effective in terms of production efficiency.
- the present invention is a speaker diaphragm using fibers extracted from bamboo leaves.
- the fiber component of bamboo leaves is 15 wt% or more, preferably 30 wt% or more of the entire fiber components of the speaker diaphragm, and when the component is refined, 5 wt% or more, preferably 10 wt% or more is used. .
- a sizing agent a paper strength agent, a waterproofing agent, a pigment, etc. may be used. Further, when raw rubber is used in an amount of 3 wt% to 10 wt% with respect to 100 wt% of fibers, the strain characteristics are improved.
- Example 1 bamboo leaves having a silicon concentration of 5030 ⁇ gSi / g and a weight of about 800 g by chemical absorptiometry (molybdenum blue / yellow method) were immersed in 400 g of water, and then at a room temperature using a pressure kneader having a volume of 3 L. Process at 20 rpm for 10 minutes. The Canadian standard freeness of this bamboo fiber is 730 ml. A 16 cm circular speaker diaphragm is manufactured from the pulp by a papermaking method. When measured in the 1 Hz tensile mode, the speed of sound obtained from the elastic modulus at 20 ° C. is 2250 m / s.
- Example 2 A 16 cm circular speaker diaphragm is manufactured by a papermaking method in the same manner as in Example 1 with a fiber ratio of 70 wt% of normal wood kraft pulp (NUKP) and 30 wt% of bamboo fibers of Example 1. The speed of sound is 2100 m / s.
- NUKP normal wood kraft pulp
- Example 3 The bamboo fiber of Example 1 is processed with a bead mill, and the BET specific surface area is refined to 2 m 2 / g.
- a speaker diaphragm is manufactured in the same manner as in Example 1 except that 10% by weight of the refined bamboo fiber having a BET specific surface area of 2 m 2 / g is mixed with 90% by weight of NUKP in Example 1.
- the speed of sound is 2400 m / s.
- the bamboo fiber is refined by at least one device such as a bead mill, a pressure homogenizer, or a disc refiner.
- Example 4 The 0.1% by weight aqueous solution of the refined bamboo fiber of Example 3 is applied to the speaker diaphragm of Example 1, and the process of drying at 100 ° C. for 30 minutes is repeated until the weight increases by 0.5 g. Manufacture a diaphragm. The speed of sound is 2450 m / s.
- Example 1 A speaker diaphragm is manufactured in the same manner as in Example 1 except that the fiber ratio of NUKP 100% in Example 2 is used. That is, the speaker diaphragm does not contain bamboo fiber at all. The speed of sound is 1850 m / s.
- Example 5 The five types of speaker diaphragms of Examples 1 to 4 and Comparative Example 1 were incorporated into a speaker having the same specifications as a magnet, a frame, and the like.
- the female vocalists were auditioned by 10 speaker designers, and the evaluation was performed with a viewpoint of the tension, elongation, and force of the treble range, with a maximum of 5 points per person (comparative example 1 being 2 points).
- the fiber extracted from bamboo leaves improves the rigidity of the diaphragm, improving the sound pressure in the high sound range and the reproduction band. It was found that it was possible to realize a good sound quality.
- a natural material called fiber extracted from bamboo leaves is used, even if it is a diaphragm with excellent sound quality in the high sound range, the noisy feeling of the sound is suppressed, providing a natural and calm tone can do.
- the speaker diaphragm according to the second embodiment further includes an isocyanate component in addition to a cellulose component of natural fibers such as bamboo fibers.
- an isocyanate component in addition to a cellulose component of natural fibers such as bamboo fibers.
- FIG. 2 is a flowchart showing a method for manufacturing the speaker diaphragm in the second embodiment of the present invention.
- Step 1 pulp that is the material of the speaker diaphragm is charged into a beater containing water.
- Step 2 the pulp input in the material input process of Step 1 is finely beaten over several days.
- Step 3 the material beaten in the beating step of Step 2 is mixed with a sizing agent, a paper strength improver, a fixing agent, and a water-dispersible polyisocyanate.
- Step 4 the material mixed in the mixing process of Step 3 is made up on the mold and the metal mesh placed thereon by the paper making method and sucked from below to remove only the moisture. It is discharged and formed into a shape as a speaker diaphragm.
- step 5 moisture contained in the speaker diaphragm formed by the paper making process of step 4 is evaporated by heating or pressurization.
- the speaker diaphragm is completed through the above five steps.
- the outermost peripheral part that is not required as the speaker diaphragm and the central hole part for inserting the voice coil are removed by a mold.
- a punching process for processing may be added.
- Water-dispersible polyisocyanate is a polyisocyanate in which hydrophilic chains such as polyalkylene ether alcohols are introduced to improve water dispersibility, and an appropriate hydrophobic chain is introduced as necessary to improve water dispersibility. It is stabilized. Isocyanate groups (NCO groups) are protected by surface chemistry techniques.
- water-dispersible polyisocyanates examples include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 4,4′-diphenylmethane diisocyanate, 2,4′-diphenylmethane diisocyanate, 4,4′-diphenyl ether diisocyanate, 2-nitrodiphenyl-4,4′-diisocyanate, 2,2′-diphenylpropane-4,4′-diisocyanate, 3,3′-dimethyldiphenylmethane-4,4′-diisocyanate, 4,4′diphenylpropane diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, naphthylene-1,4-diisocyanate, naphthylene-1,5-diisocyanate, 3,3′-dimethoxydiphenyl-4,4′-diisocyanate, etc.
- Aromatic isocyanates aliphatic isocyanates such as 1,6-hexamethylene diisocyanate, 1,4-tetramethylene diisocyanate, lysine diisocyanate, aromatic aliphatic diisocyanates such as xylylene-1,4-diisocyanate, xylylene-1,3-diisocyanate, Isophorone diisocyanate, water-added tolylene diisocyanate, water-added xylene diisocyanate, water-added diphenylmethane diisocyanate, water-added tetramethylxylene diisocyanate, alicyclic diisocyanate, NCO group-terminated compounds by reaction of these compounds with active hydrogen group-containing compounds, etc. Can be mentioned.
- a water-dispersible polyisocyanate a diisocyanate polymer, a bifunctional or higher functional polyol, and the like are used instead of a polyisocyanate in which a polyol is added to an organic isocyanate and an isocyanurate-forming catalyst is added to introduce an isocyanurate ring structure.
- any of a polyisocyanate polymer and a polyisocyanate polyol adduct can be used in the present invention.
- These polyisocyanates can be used alone or in a mixture of two or more.
- aliphatic or alicyclic polyisocyanates are preferred in view of water dispersion stability, stability of NCO groups after water dispersion, non-yellowing, and the like.
- 700 g of bamboo fiber composed of a bundle having an average fiber length of about 1.75 mm and an integrated length of about 10 cm is treated with a pressure kneader having a volume of 3 liters at 25 rpm for 20 minutes and beaten. . Thereafter, the beaten bamboo fiber is made into a 5% aqueous dispersion, treated with a 3 liter bead mill using glass beads for 20 minutes, and further beaten.
- the average fiber length of the beaten fiber is 0.8 mm, and the BET specific surface area is 2.11 m 2 / g.
- Takenate WD-WD-220, WB-700, or WB-920 made by Mitsui Chemicals Polyurethane is mixed with the water dispersion as a water-dispersible polyisocyanate. Thereafter, an aqueous dispersion containing the beaten bamboo fiber is made and dried at 160 ° C. for 5 minutes to complete a speaker diaphragm.
- This speaker diaphragm has a structure in which bamboo fibers, which are cellulose components of natural fibers, are crosslinked by water-dispersible polyisocyanate, which is an isocyanate component. For this reason, the rigidity of the speaker diaphragm can be increased.
- the diaphragm is more rigid than impregnating the diaphragm with polyol and polyisocyanate after the papermaking step and covering the diaphragm with polyurethane. Can be high. Furthermore, since the step of impregnating with polyol or polyisocyanate after the paper making step can be omitted, the production cost can be reduced. Moreover, as a result of viewing and evaluating the speaker manufactured according to the second embodiment, it was possible to make it easier to hear particularly high-frequency sounds such as female soprano.
- FIG. 3 is a cross-sectional view of the speaker according to Embodiment 3 of the present invention.
- an internal magnet type magnetic circuit 24 is formed.
- a frame 26 is coupled to the yoke 23 of the magnetic circuit 24.
- the outer peripheral portion of the speaker diaphragm 27 is bonded to the peripheral portion of the frame 26 via the edge 29.
- One end of the voice coil 28 is coupled to the central portion of the speaker diaphragm 27, and the opposite end of the voice coil 28 is coupled so as to fit into the magnetic gap 25 of the magnetic circuit 24.
- the speaker having the inner magnet type magnetic circuit 24 has been described.
- the present invention is not limited to this and may be applied to a speaker having an outer magnet type magnetic circuit. Further, the present invention can be applied to a small speaker in which the diaphragm 27 and the edge 29 are integrated.
- the loudspeaker using the loudspeaker diaphragm according to the first embodiment can improve the rigidity of the diaphragm with fibers extracted from bamboo leaves, and can realize an improvement in sound pressure in a high sound range and an expansion of a reproduction band. Good sound quality can be realized. Furthermore, the loud feeling of the sound is suppressed, and a natural and calm tone can be provided.
- the speaker using the speaker diaphragm of the second embodiment can realize a speaker in which bamboo fiber, which is a cellulose component of natural fiber, is cross-linked by water-dispersible polyisocyanate, which is an isocyanate component, and rigidity is reinforced.
- This loudspeaker can reproduce heavy bass with tightness in the low frequency range and clear sound in the high frequency range.
- Embodiment 4 An audio electronic device having a speaker incorporating the speaker diaphragm of the present invention will be described below using Embodiment 4.
- FIG. 4 is an external view of an audio electronic device according to Embodiment 4 of the present invention.
- the speaker 30 in FIG. 4 incorporates the speaker diaphragm created in the first or second embodiment.
- the speaker 30 is incorporated in the enclosure 41 and constitutes a speaker system.
- the audio electronic device 44 includes an amplifier 42 that amplifies the audio signal input to the speaker 30 and a player 43 that outputs the audio signal input to the amplifier 42.
- the audio electronic device 44 is set as an example, but the present invention is not limited to this.
- the present invention can also be applied to portable portable audio devices, game devices, and the like.
- the present invention can also be applied to information equipment such as video equipment and mobile phones.
- Embodiment 5 a moving device including a speaker incorporating the speaker diaphragm of the present invention will be described using Embodiment 5.
- FIG. 5 is a sectional view of the moving device according to the fifth embodiment of the present invention.
- the mobile device in FIG. 5 uses a car as a specific example.
- the speaker 30 incorporates the speaker diaphragm created in the first or second embodiment.
- the speaker 30 is incorporated in a rear tray or a front panel, and the speaker 30 is driven by an amplifier (not shown) and used as a part of the sound output of car navigation or car audio.
- the automobile 50 is described as an example of the moving device.
- the present invention can be widely applied to a moving device including at least a moving means and incorporating a speaker 30 such as a motorcycle such as a motorcycle and a train running on a rail.
- speaker diaphragm of the present invention has been described with reference to an example formed by papermaking, it is not limited to this and can be implemented by other methods such as injection molding and press molding.
- the speaker diaphragm, the speaker, the electronic device, and the moving device of the present invention are a speaker, an electronic device, an audiovisual device, an information communication device, and an automobile that require a speaker with high sound quality, high reliability, and low environmental load. Applicable to mobile devices.
Abstract
Description
図1は、本発明の実施の形態1におけるスピーカ用振動板の断面図である。図1において、振動板27は、少なくとも竹の葉から抽出された繊維を5wt%以上使用して、抄紙工法で製造されたスピーカ用振動板である。剛性の高い天然繊維には、二酸化珪素化合物が多く含まれている。また二酸化珪素化合物は植物の種類や部位によって形状や大きさが異なるため、二酸化珪素化合物を多く含む植物の種類や部位から抽出した繊維(パルプ)を使用することで抄紙振動板の剛性が向上し、スピーカ用振動板の音質を向上させることができる。
化学的吸光光度法(モリブデン青・黄法)により珪素濃度が5030μgSi/g、重量約800gの竹の葉を、400gの水に浸したのち、容積が3Lの加圧ニーダにより、室温にて、20rpm、10分間処理する。この竹繊維のカナダ標準濾水度は730mlである。そのパルプから、抄紙工法により16cm円形のスピーカ用振動板を製造する。1Hz引張モードで測定すると20℃での弾性率から求まる音速は2250m/sである。
通常の木材クラフトパルプ(NUKP)70wt%、実施例1の竹繊維30wt%の繊維比で実施例1と同様に、抄紙工法により16cm円形のスピーカ用振動板を製造する。音速は、2100m/sである。
実施例1の竹繊維をビーズミルで加工し、BET比表面積が2m2/gまで微細化する。実施例1のNUKP90wt%に対して上記BET比表面積が2m2/gの微細化竹繊維を10wt%混合した以外は、実施例1と同様にスピーカ用振動板を製造する。音速は、2400m/sである。ここで、竹繊維の微細化方法は、ビーズミル、圧力式ホモジナイザー、ディスクリファイナーの少なくとも1種類以上の機器で微細化することが好ましい。
実施例1のスピーカ用振動板に対して、実施例3の微細化竹繊維0.1wt%水溶液を塗布し、100℃乾燥30分の工程を、重量が0.5g増加するまで繰り返してスピーカ用振動板を製造する。音速は、2450m/sである。ここで、微細化した竹繊維の塗布方法は、スプレーあるいは吸引堆積抄紙法にて表面塗布することが好ましい。
実施例2のNUKP100%の繊維比率にした以外は、実施例1と同様にスピーカ用振動板を製造する。つまり竹繊維が全く含まれていないスピーカ用振動板である。音速は、1850m/sである。
実施例1~4及び比較例1の5種のスピーカ用振動板を、マグネット、フレーム等が同じ仕様のスピーカに組み込んだ。そして女性ボーカルを10名のスピーカ設計者に試聴させ、1名5点満点(比較例1を2点とする)で高音域の張り、伸び、迫力に観点を当てて評価した。
実施の形態2のスピーカ用振動板は、竹繊維等の天然繊維のセルロース成分に、さらにイソシアネート成分を含むものである。竹繊維等の天然繊維のセルロース成分をイソシアネート成分により架橋することで、スピーカ用振動板の剛性を高めることが出来る。
以下、実施の形態3を用いて、本発明のスピーカ用振動板をスピーカに適用した例について説明する。本実施の形態3のスピーカは、実施の形態1あるいは実施の形態2で作成したスピーカ用振動板を組み込んでいる。
以下、実施の形態4を用いて、本発明のスピーカ用振動板を組み込んだスピーカを有するオーディオ用の電子機器について説明する。
以下、実施の形態5を用いて、本発明のスピーカ用振動板を組み込んだスピーカを備えた移動装置について説明する。
22 上部プレート
23 ヨーク
24 磁気回路
25 磁気ギャップ
26 フレーム
27 スピーカ用振動板
28 ボイスコイル
29 エッジ
30 スピーカ
41 エンクロジャー
42 アンプ
43 プレーヤ
44 オーディオ用の電子機器
50 自動車
Claims (11)
- 抄紙工法で製造されるスピーカ用振動板であって、少なくとも竹の葉から抽出された繊維を5wt%以上有するスピーカ用振動板。
- 前記竹の葉の中の珪素濃度が5000μgSi/g以上である
請求項1記載のスピーカ用振動板。 - 前記竹の葉を、二軸混練することでパルプ化した
請求項1記載のスピーカ用振動板。 - 前記竹の葉から抽出された繊維は、前記竹の葉を、ビーズミル、圧力式ホモジナイザー、ディスクリファイナーの少なくとも1つの機器で微細化した
請求項1記載のスピーカ用振動板。 - 前記微細化した竹繊維は、スプレー方法あるいは吸引堆積抄紙法のいずれか1つの方法で表面塗布した
請求項4記載のスピーカ用振動板。 - 生ゴムを含有した
請求項1記載のスピーカ用振動板。 - イソシアネート成分を更に含み、前記竹の葉から抽出された繊維が前記イソシアネート成分によって架橋された
請求項1記載のスピーカ用振動板。 - 叩解したパルプに竹繊維を混合する混合工程と、前記混合した材料をスピーカ用振動板の形状に抄く抄紙工程と、前記スピーカ用振動板を乾燥させる乾燥工程とからなるスピーカ用振動板の製造方法であって、
前記混合工程で、水分散性ポリイソシアネートをさらに混合することを特徴とするスピーカ用振動板の製造方法。 - 磁気回路に結合されたフレームと、前記フレームの外周部に結合された請求項1記載のスピーカ用振動板と、前記スピーカ用振動板に結合されたボイスコイルとを
備えたスピーカ。 - 磁気回路に結合されたフレームと、前記フレームの外周部に結合された請求項1記載のスピーカ用振動板と、前記スピーカ用振動板に結合されたボイスコイルとを備えたスピーカと、
前記スピーカを駆動するオーディオ信号の増幅回路を有する
電子機器。 - 請求項1記載のスピーカ用振動板を組み込んだスピーカと、前記スピーカを駆動する増幅回路と、移動手段とを備えた
移動装置。
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Application Number | Priority Date | Filing Date | Title |
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CN2009801105027A CN101981946A (zh) | 2008-07-25 | 2009-07-23 | 扬声器用振动膜、扬声器、扬声器用振动膜的制造方法 |
US12/921,231 US20110007931A1 (en) | 2008-07-25 | 2009-07-23 | Speaker diaphragm, speaker, and method for manufacturing speaker diaphragm |
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JP2008191948A JP5309756B2 (ja) | 2008-07-25 | 2008-07-25 | 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 |
JP2008-191948 | 2008-07-25 | ||
JP2008197325A JP5332382B2 (ja) | 2008-07-31 | 2008-07-31 | スピーカ用振動板の製造方法、及びこの製造方法により製造したスピーカ用振動板、同振動板を用いたスピーカ、同スピーカを用いた電子機器及び移動体 |
JP2008-197325 | 2008-07-31 |
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PCT/JP2009/003453 WO2010010701A1 (ja) | 2008-07-25 | 2009-07-23 | スピーカ用振動板、スピーカ、スピーカ用振動板の製造方法 |
Country Status (3)
Country | Link |
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US (1) | US20110007931A1 (ja) |
CN (1) | CN101981946A (ja) |
WO (1) | WO2010010701A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013099790A1 (ja) * | 2011-12-26 | 2013-07-04 | 株式会社ディーアンドエムホールディングス | ヘッドホン及びヘッドホンドライバー |
Families Citing this family (5)
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---|---|---|---|---|
CN106817658A (zh) * | 2017-01-12 | 2017-06-09 | 瑞声科技(沭阳)有限公司 | 振膜及发声器件 |
CN106930134B (zh) * | 2017-01-20 | 2018-10-30 | 广西玉林市禹力音响配件有限公司 | 一种扬声器鼓纸的制作方法 |
JP7101929B2 (ja) * | 2017-11-02 | 2022-07-19 | ヤマハ株式会社 | スピーカー用振動板 |
WO2022061486A1 (zh) * | 2020-09-22 | 2022-03-31 | 江苏丰迪科技有限公司 | 鼓纸胴体成型方法 |
CN114257942A (zh) * | 2020-09-22 | 2022-03-29 | 江苏丰迪科技有限公司 | 鼓纸胴体成型方法 |
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JP2000324591A (ja) * | 1999-04-27 | 2000-11-24 | Pioneer Electronic Corp | 紙製のスピーカー用振動板 |
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WO2013099790A1 (ja) * | 2011-12-26 | 2013-07-04 | 株式会社ディーアンドエムホールディングス | ヘッドホン及びヘッドホンドライバー |
Also Published As
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US20110007931A1 (en) | 2011-01-13 |
CN101981946A (zh) | 2011-02-23 |
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