JPH0993694A - Voice coil bobbin for electroacoustic transducer - Google Patents
Voice coil bobbin for electroacoustic transducerInfo
- Publication number
- JPH0993694A JPH0993694A JP26953195A JP26953195A JPH0993694A JP H0993694 A JPH0993694 A JP H0993694A JP 26953195 A JP26953195 A JP 26953195A JP 26953195 A JP26953195 A JP 26953195A JP H0993694 A JPH0993694 A JP H0993694A
- Authority
- JP
- Japan
- Prior art keywords
- voice coil
- coil bobbin
- electroacoustic transducer
- pulp
- lumen
- 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.)
- Pending
Links
Landscapes
- Paper (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気音響変換器用
の例えば、オーディオ機器の分野に於けるスピーカ用の
ボイスコイルボビンに関し、特に高剛性で内部損失が大
きく、吸水性が優れたボイスコイルボビンの構成材料に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice coil bobbin for an electroacoustic transducer, for example, a speaker in the field of audio equipment, and more particularly to a voice coil bobbin having high rigidity, large internal loss and excellent water absorption. Regarding materials.
【０００２】[0002]
【従来の技術】従来の動電型のスピーカは、図４に全体
の断面構造を示すように、コーン型振動板６ａ、ボイス
コイル６ｂ、ダストキャツプ６ｄ等からなる振動系６
が、底部に磁気回路７が固定されたフレーム８の内部
に、エッジ６ｃによって振動可能に支持されている。ボ
イスコイル（ムービングコイル）６ｂは、円筒状のボイ
スコイルボビン５に巻回され、当該ボイスコイルボビン
５によって前記振動板６ａに結合されると共に、磁気回
路７の磁気空隙７ａに挿入されてスピーカの駆動系を構
成する。2. Description of the Related Art A conventional electrodynamic loudspeaker has a vibrating system 6 including a cone type diaphragm 6a, a voice coil 6b, a dust cap 6d, etc., as shown in the sectional structure of FIG.
Is oscillatably supported by an edge 6c inside a frame 8 having a magnetic circuit 7 fixed to the bottom. The voice coil (moving coil) 6b is wound around a cylindrical voice coil bobbin 5, is coupled to the diaphragm 6a by the voice coil bobbin 5, and is inserted into the magnetic air gap 7a of the magnetic circuit 7 to drive the speaker. Make up.
【０００３】この様に構成された電気音響変換器用ボイ
スコイルボビン５は、音声電流によってボイスコイル６
ｂに発生した駆動力を振動板６ａに忠実に伝達する機能
が要求され、そのためにボイスコイルボビン５には、能
率向上の為に軽量であること、振動に伴う変形を防止す
る為に高剛性であること、更に、コーン型振動板６ａや
ボイスコイル６ｂとの接着力を維持し、環境変化に対し
安定であるための耐濕性並びに寸法安定性（保形性）、
が要求とされる。これらの要求を満たす材料として、低
密度で適度な剛性を備え、且つ安価であることから紙が
多用されているが、その他にもアルミ、ジュラルミン等
の金属箔、ポリイミド等の樹脂フィルムが使用されてい
る。The voice coil bobbin 5 for an electroacoustic transducer thus constructed has a voice coil 6 driven by a voice current.
The function of faithfully transmitting the driving force generated in b to the vibration plate 6a is required, and therefore the voice coil bobbin 5 is lightweight to improve efficiency, and has high rigidity to prevent deformation due to vibration. In addition, the adhesiveness with the cone-type diaphragm 6a and the voice coil 6b is maintained, and it is stable against environmental changes.
Is required. As a material that meets these requirements, paper is often used because it has low density, moderate rigidity, and is inexpensive, but aluminum, metal foil such as duralumin, and resin film such as polyimide are also used. ing.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の紙製の電気
音響変換器用ボイスコイルボビンは、近年のデジタル対
応のスピーカでは、紙の原料であるパルプが有する剛性
だけでは不十分であり、この欠点を解消するために、パ
ルプ繊維の表面や繊維間に炭酸カルシウム、二酸化チタ
ン等の無機填料を充填させているが、このような無機質
の充填剤は、その大部分が繊維表面上に吸着しているだ
けであるので、パルプの叩解時に脱落して、紙の剛性付
与には有効に作用しない欠点があり、又、金属箔のボイ
スコイルボビンは高価であり、振動系が過制動状態とな
ったり、内部損失が低いために電気音響変換器用ボイス
コイルボビン自身が共振して異常音を発生し、再生音質
が優れないと言う解決すべき課題があった。The conventional voice coil bobbin for electroacoustic transducer made of paper is not sufficient in the recent digital speaker because the rigidity of pulp, which is the raw material of paper, is insufficient. In order to solve the problem, inorganic fillers such as calcium carbonate and titanium dioxide are filled on the surface of the pulp fiber or between the fibers, and most of these inorganic fillers are adsorbed on the fiber surface. Therefore, there is a drawback that it falls off when the pulp is beaten, and it does not work effectively to give rigidity to the paper.Also, the voice coil bobbin of metal foil is expensive, the vibration system becomes overdamped, Since the loss is low, the voice coil bobbin for the electroacoustic transducer resonates to generate an abnormal sound, and there is a problem to be solved that the reproduced sound quality is not excellent.
【０００５】そこで、本発明は、振動系材料として従来
の紙が有していた課題を解決することを目的とし、パル
プ繊維がルーメン（内腔部）を有する事に着目し、当該
ルーメン内に無機質の難水溶性結晶を析出させると共
に、超叩解木材パルプを混合し、併せて熱硬化性樹脂を
含浸することで、高剛性と相対湿度の変化に対する寸法
安定性（保形性）並びに高内部抵抗を有するボイスコイ
ルボビン５を提供することを目的とする。Therefore, the present invention aims to solve the problems that conventional paper has as a vibration system material, and pays attention to the fact that pulp fibers have a lumen (lumen portion), and By precipitating inorganic water-insoluble crystals, mixing super-beaten wood pulp, and impregnating it with thermosetting resin, high rigidity and dimensional stability (shape retention) against changes in relative humidity and high internal It is an object to provide a voice coil bobbin 5 having resistance.
【０００６】[0006]
【課題を解決するための手段】該目的を達成するための
本発明にいう電気音響変換器用ボイスコイルボビンを、
実施例に於いて使用した符号を用いて説明すると、第１
発明は、パルプ繊維のルーメン（内腔部）１ａの内部
に、無機質の難水溶性結晶２を析出させたパルプ繊維１
と、超叩解木材パルプ３とがブレンドされた複合素材
に、熱硬化性樹脂４を含浸して熱プレス成形して得たシ
ート材料からなることを特徴とする電気音響変換器用ボ
イスコイルボビン５である。A voice coil bobbin for an electroacoustic transducer according to the present invention for achieving the above object,
The description will be made with reference to the symbols used in the examples.
The invention is a pulp fiber 1 in which an inorganic poorly water-soluble crystal 2 is deposited inside a lumen (lumen) 1a of pulp fiber.
A voice coil bobbin 5 for an electroacoustic transducer, comprising a sheet material obtained by impregnating a thermosetting resin 4 into a composite material obtained by blending and a super-beaten wood pulp 3 and performing hot press molding. .
【０００７】第２発明は、第１発明に於いて、ルーメン
１ａ内部の無機質の難水溶性結晶２が、木材パルプを無
機塩水溶液中で加熱浸漬処理した後アルカリ加熱するこ
とにより得ることを特徴とする電気音響変換器用ボイス
コイルボビン５である。A second invention is characterized in that, in the first invention, the inorganic poorly water-soluble crystal 2 in the lumen 1a is obtained by subjecting wood pulp to a heat-immersion treatment in an aqueous solution of an inorganic salt, and then heating with alkali. It is the voice coil bobbin 5 for the electroacoustic transducer.
【０００８】第３発明は、第２発明に於いて、前記無機
塩がアルカリ土類金属塩であることを特徴とする電気音
響変換器用ボイスコイルボビン５である。A third invention is a voice coil bobbin 5 for an electroacoustic transducer according to the second invention, wherein the inorganic salt is an alkaline earth metal salt.
【０００９】第４発明は、第２発明に於いて、前記無機
塩がマグネシウム塩であることを特徴とする電気音響変
換器用ボイスコイルボビン５である。A fourth invention is a voice coil bobbin 5 for an electroacoustic transducer according to the second invention, wherein the inorganic salt is a magnesium salt.
【００１０】第５発明は、第２発明に於いて、前記無機
塩水溶液中での加熱温度が５０℃以上であり、且つ、無
機塩水溶液の濃度が０．０１ｗｔ％以上であることを特
徴とする電気音響変換器用ボイスコイルボビン５であ
る。A fifth invention is characterized in that, in the second invention, the heating temperature in the inorganic salt aqueous solution is 50 ° C. or higher, and the concentration of the inorganic salt aqueous solution is 0.01 wt% or higher. This is a voice coil bobbin 5 for an electro-acoustic transducer.
【００１１】第６発明は、第２発明に於いて、前記アル
カリ加熱の加熱温度が５０℃以上であり、且つ、ｐｈが
１０〜１２であることを特徴とする第２発明の電気音響
変換器用ボイスコイルボビン５である。A sixth invention is the electroacoustic transducer according to the second invention, wherein in the second invention, the heating temperature of the alkali heating is 50 ° C. or higher and ph is 10 to 12. The voice coil bobbin 5.
【００１２】第７発明は、第１発明に於いて、前記超叩
解木材パルプ（３）が高圧ホモジナイザにより叩解さ
れ、且つ、そのフリーネスが１００〜１５０ｍｌである
ことを特徴とする電気音響変換器用ボイスコイルボビン
５である。A seventh invention is the voice for an electroacoustic transducer according to the first invention, wherein the super-beaten wood pulp (3) is beaten by a high-pressure homogenizer and the freeness thereof is 100 to 150 ml. The coil bobbin 5.
【００１３】第８発明は、第１発明に於いて、前記超叩
解木材パルプ（３）の添加率が、絶乾パルプ繊維１に対
して１．００ｗｔ％〜１０．００ｗｔ％の範囲であるこ
とを特徴とする電気音響変換器用ボイスコイルボビン５
である。In an eighth aspect based on the first aspect, the addition rate of the super-beaten wood pulp (3) is in the range of 1.00 wt% to 10.00 wt% with respect to the absolutely dry pulp fiber 1. Voice coil bobbin 5 for electro-acoustic transducers
It is.
【００１４】第９発明は、第１発明に於いて、前記熱硬
化性樹脂４が、シリコン樹脂、又はフェノール樹脂、又
は不飽和ポリエステル樹脂、又はメラミン樹脂、又はエ
ポキシ樹脂の中から選ばれた熱硬化性樹脂であることを
特徴とする第１発明の電気音響変換器用ボイスコイルボ
ビン５である。A ninth invention is the thermosetting resin 4 according to the first invention, wherein the thermosetting resin 4 is selected from the group consisting of silicone resin, phenol resin, unsaturated polyester resin, melamine resin and epoxy resin. A voice coil bobbin 5 for an electroacoustic transducer according to the first aspect of the present invention, which is a curable resin.
【００１５】[0015]
【発明の実施の形態】本発明電気音響変換器用ボイスコ
イルボビンの実施形態を、図１〜図３に基づいて説明す
る。本発明のボイスコイルボビン５を構成する複合素材
の一方の主材料であるパルプ繊維１は、図１に示すよう
に、円筒状のパルプ繊維壁１ｂと、当該パルプ繊維壁１
ｂに囲まれたルーメン１ａと称する内腔部とからなり、
パルプ繊維壁１ｂにはルーメン１ａと外部とを連結する
孔部１ｃが散在する構造となっている。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a voice coil bobbin for an electroacoustic transducer of the present invention will be described with reference to FIGS. The pulp fiber 1 which is one of the main materials of the composite material constituting the voice coil bobbin 5 of the present invention has a cylindrical pulp fiber wall 1b and the pulp fiber wall 1 as shown in FIG.
It is composed of a lumen 1a surrounded by b and
The pulp fiber wall 1b has a structure in which holes 1c connecting the lumen 1a and the outside are scattered.
【００１６】本発明に係るシート材料は、図２に示すよ
うに、原材料の木材パルプを、アルカリ土類金属塩であ
るマグネシウム塩などの、濃度が０．０１〜１．０ｗｔ
％の無機塩水溶液中で、温度が５０℃以上、好ましくは
８０〜１２０℃に於いて無機塩加熱浸漬処理した後、加
熱温度が５０℃以上、好ましくは８０〜１２０℃で、且
つ、ｐｈが１０〜１２の条件下でアルカリ加熱すること
により前記ルーメン１ａ内に前記無機質の難水溶性結晶
２が析出された構造となっているパルプ繊維１（同図の
一部断面拡大図ａに図示）と、同じ処理をしたパルプ繊
維１の一部を高圧ホモジナイザによりフリーネスが１０
０〜１５０ｍｌとなるまで叩解した超叩解木材パルプ３
とからなる。As shown in FIG. 2, the sheet material according to the present invention contains wood pulp as a raw material and has a concentration of 0.01 to 1.0 wt% such as magnesium salt which is an alkaline earth metal salt.
% Aqueous solution of inorganic salt, the temperature is 50 ° C. or higher, preferably 80 to 120 ° C., and the heating temperature is 50 ° C. or higher, preferably 80 to 120 ° C., and ph Pulp fiber 1 having a structure in which the inorganic poorly water-soluble crystal 2 is deposited in the lumen 1a by heating with alkali under the condition of 10 to 12 (shown in a partially enlarged cross-sectional view a of the same figure) And a part of pulp fiber 1 treated in the same manner has a freeness of 10 by a high pressure homogenizer.
Super-beaten wood pulp 3 beaten to 0 to 150 ml
Consists of
【００１７】次いで、上記ルーメン内に難水溶性結晶２
が析出されているパルプ繊維１をパルパ（離解機）で
Ｃ．Ｓ．Ｆ．６７０ｍｌとなるまで離解し、前記超叩解
木材パルプ３をブレンドして、通常の抄紙機により平板
状に抄造することにより複合素材とする。ここに、Ｃ．
Ｓ．Ｆ．とは、カナダ標準型濾水度（Ｃａｎｚｄｉａｎ
Ｓｔａｎｄａｒｄ Ｆｒｅｅｎｅｓｓ、フリーネス）
のことをいう。Then, a poorly water-soluble crystal 2 is placed in the lumen.
The pulp fiber 1 on which C. S. F. The mixture is disintegrated to a volume of 670 ml, the super-beaten wood pulp 3 is blended, and the mixture is made into a flat material by a conventional paper machine to obtain a composite material. Here, C.I.
S. F. Is the Canadian standard freeness (Canzdian
Standard Freeness, Freeness)
I mean.
【００１８】パルプ繊維１の処理に際し、浸漬、加熱温
度が５０度Ｃ以下であればパルプ繊維の膨潤が不充分
で、無機塩水溶液のルーメン１ａ内への浸透が充分でな
く、１２０度Ｃ以上ではパルプ繊維成分が分解溶出し、
難水溶性結晶２が均一に生成され難くなる。無機塩水溶
液としては、前記以外にアルカリ金属やアルカリ土類金
属の塩化物、硫酸塩、硝酸塩、燐酸塩などの水溶液が用
いられるが、最適な無機塩は塩化マグネシウムである。
又、アルカリとしては、水酸化ナトリウム、水酸化カリ
ウム、水酸化リチウム等が用いられる。When the pulp fiber 1 is treated at a dipping and heating temperature of 50 ° C. or lower, the swelling of the pulp fiber is insufficient, the permeation of the aqueous solution of an inorganic salt into the lumen 1a is insufficient, and the temperature is 120 ° C. or higher. Then the pulp fiber component is decomposed and eluted,
The hardly water-soluble crystals 2 are hard to be uniformly generated. As the inorganic salt aqueous solution, an aqueous solution of chloride, sulfate, nitrate, phosphate or the like of alkali metal or alkaline earth metal is used in addition to the above, and the most suitable inorganic salt is magnesium chloride.
Further, as the alkali, sodium hydroxide, potassium hydroxide, lithium hydroxide or the like is used.
【００１９】上記抄造された複合素材に、熱硬化性樹脂
４を含浸させ、金型により熱プレス成形してシート材料
にすることでボイスコイルボビン５として使用する。こ
の様なシート材料は同図２の一部断面拡大図ｂに示すよ
うな組織構造となっている。The composite material produced as described above is impregnated with a thermosetting resin 4, and is heat-pressed with a die to obtain a sheet material, which is used as a voice coil bobbin 5. Such a sheet material has a texture structure as shown in a partially enlarged cross-sectional view b of FIG.
【００２０】当該ボイスコイルボビン５は、図３に示す
ものは、平らに成形されたシート材料を円筒状に丸め、
下方にボイスコイル６ｂを巻回した構造のものを、一部
断面及び継目５ａとともに図示しているが、必要に応じ
て熱プレス成形時に円筒形に成形してもよい。The voice coil bobbin 5 shown in FIG. 3 is obtained by rolling a flatly formed sheet material into a cylindrical shape,
Although the structure in which the voice coil 6b is wound downward is shown with a partial cross section and the joint 5a, it may be formed into a cylindrical shape at the time of hot press forming if necessary.
【００２１】又、含浸させる熱硬化性樹脂３は、シリコ
ン樹脂、フェノール樹脂、不飽和ポリエステル樹脂、メ
ラミン樹脂、エポキシ樹脂、などが用いられるが、好ま
しくはシリコン樹脂である。As the thermosetting resin 3 to be impregnated, a silicone resin, a phenol resin, an unsaturated polyester resin, a melamine resin, an epoxy resin or the like is used, but a silicone resin is preferable.
【００２２】本発明の上記シート材料の複合素材は、２
段階の処理によりパルプの改質を図っている。通常室温
でのパルプは水素結合により強固に結合しているが、第
１段階ではパルプを高温の無機塩水溶液中に浸漬するこ
とにより、パルプ繊維が膨潤し易くなり、ルーメン１ａ
まで無機塩水溶液が十分浸透する。The composite material of the above sheet materials of the present invention is 2
The pulp is reformed by the stepwise treatment. Usually, the pulp at room temperature is strongly bonded by hydrogen bonds, but in the first step, the pulp fibers are swelled easily by immersing the pulp in a high temperature aqueous solution of an inorganic salt.
Inorganic salt aqueous solution penetrates to the end.
【００２３】次に第２段階としてアルカリを添加するこ
とにより、このアルカリがパルプスラリを更に膨潤させ
ながら順次パルプ繊維壁中に浸透して、ルーメン１ａ内
の無機塩水溶液と反応し、水に難溶性の微細な結晶が生
成する。従って、ルーメン内に生成した結晶に約１００
オングストローム以下の水吸着サイトが生じ、この部分
に水が吸着して、パルプ繊維壁中の水とセルロースとの
相互作用が強まり、水吸着率が高くなる。Next, as a second step, by adding an alkali, the alkali penetrates into the pulp fiber wall in order while further swelling the pulp slurry, reacts with the aqueous solution of the inorganic salt in the lumen 1a, and is hardly soluble in water. Of fine crystals are generated. Therefore, about 100 crystals are formed in the lumen.
A water adsorption site of angstrom or less is generated, water is adsorbed to this portion, the interaction between water in the pulp fiber wall and cellulose is strengthened, and the water adsorption rate is increased.
【００２４】すなわち、ルーメン構造のような毛細管内
で難水溶性結晶の周囲に保護コロイドのごとく、毛細管
水が吸着することにより水の出入りを無くす役割をして
おり、この毛細管水の吸着率が高いほど飽和状態にな
り、結局紙の水分はセルロース分子と水分子とが水素結
合した結合水と吸着水だけとなるためために給水性は低
下する。そのため相対湿度の変化に対する寸法安定性に
優れ、ルーメン内に難水溶性結晶２を生ずることにより
剛性が高くなる。That is, as in the case of a protective colloid around a poorly water-soluble crystal in a capillary tube having a lumen structure, the capillary water adsorbs water to prevent water from entering and exiting. The higher it is, the more saturated it is, and eventually the water content of the paper is reduced because the water content of the paper is only the bound water in which the cellulose molecules and the water molecules are hydrogen-bonded and the adsorbed water. Therefore, the dimensional stability with respect to changes in relative humidity is excellent, and the rigidity is increased by forming the hardly water-soluble crystals 2 in the lumen.
【００２５】次に、外側シリンダの内側に狭いスリット
を介して内側シリンダを配置し、この狭いスリット間に
高圧でウエット状パルプを押込め、外側シリンダと内側
シリンダを互いに逆回転させ、これを数回繰り返すこと
により、繊維軸に沿ってサブミクロンまでにフィブリル
化した超叩解木材パルプ３をブレンドしているので、繊
維相互間の摩擦抵抗が増大し、高内部損失を得る。更
に、熱硬化性樹脂を含浸させて、熱プレス成型すること
によって、より一層剛性と吸水性を改善することが可能
である。Next, the inner cylinder is arranged inside the outer cylinder through a narrow slit, the wet pulp is pushed under high pressure between the narrow slits, and the outer cylinder and the inner cylinder are rotated in reverse to each other. By repeating the process repeatedly, the super-beaten wood pulp 3 fibrillated to submicron along the fiber axis is blended, so that the friction resistance between the fibers is increased and a high internal loss is obtained. Further, it is possible to further improve rigidity and water absorption by impregnating with a thermosetting resin and performing hot press molding.
【００２６】[0026]
【実施例】以下本発明電気音響変換器用ボイスコイルボ
ビン５の実施例を、成形前のシート材料を主体に、具体
的に説明する。 実施例１ ０．０５ｗｔ％塩化マグネシウム水溶液５００ｍｌにＢ
ＫＰ（晒クラフトパルプ）１５ｇを浸漬し、８０℃で約
３０分撹拌した。次に、０．１ｗｔ％水酸化ナトリウム
水溶液１３０ｍｌを加え、ｐｈを１１として、８０℃で
約３０分撹拌し、処理済みの木材パルプ１を得る。EXAMPLE An example of the voice coil bobbin 5 for an electroacoustic transducer of the present invention will be specifically described below mainly on a sheet material before molding. Example 1 B was added to 500 ml of 0.05 wt% magnesium chloride aqueous solution.
15 g of KP (bleached kraft pulp) was dipped and stirred at 80 ° C. for about 30 minutes. Next, 130 ml of 0.1 wt% sodium hydroxide aqueous solution is added, pH is set to 11, and the mixture is stirred at 80 ° C. for about 30 minutes to obtain treated wood pulp 1.
【００２７】前記処理済みのパルプ繊維１を、パルパ
（離解機）でＣ．Ｓ．Ｆ．６７０ｍｌに離解し、この離
解したパルプの一部を外側シリンダと内側シリンダ間の
狭いスリット内に高圧でウエット状パルプを押込め、外
側シリンダと内側シリンダを互いに逆回転させ、これを
数回繰り返すことにより、Ｃ．Ｓ．Ｆ１００ｍｌまで超
叩解して、繊維軸に沿ってサブミクロンまでにフィブリ
ル化した超叩解木材パルプ３とする。The treated pulp fiber 1 was treated with a pulper (disintegrator) to give a C.I. S. F. Disintegrate into 670 ml, push a part of this disintegrated pulp into the narrow slit between the outer cylinder and the inner cylinder with high pressure, rotate the outer cylinder and the inner cylinder in opposite directions, and repeat this several times. According to C.I. S. Super-beaten up to 100 ml of F to obtain super-beaten wood pulp 3 fibrillated to submicron along the fiber axis.
【００２８】上記処理済みのパルプ繊維１に対して超叩
解木材パルプ３を、夫々１％，３％，５％，７％，１０
％添加して平網を用いて抄造し複合素材とする。これに
熱硬化性樹脂４としてシリコン樹脂約１０ｗｔ％含浸
し、１００〜１２０℃で熱プレス成型を行ってシート材
料とし、当該シート材料を直径２５ｍｍの棒に巻き付
け、電気音響変換器用ボイスコイル６ｂを巻線した。
又、同じシート材料からテスト用の試料１１を得た。1%, 3%, 5%, 7% and 10% of super-beaten wood pulp is added to the treated pulp fiber 1 respectively.
% And papermaking is carried out using a flat net to obtain a composite material. About 10 wt% of a silicon resin as a thermosetting resin 4 is impregnated into the sheet material, and a sheet material is formed by hot press molding at 100 to 120 ° C. The sheet material is wound around a rod having a diameter of 25 mm, and a voice coil 6b for an electroacoustic transducer is formed. I wound up.
In addition, a test sample 11 was obtained from the same sheet material.
【００２９】実施例２ １．００ｗｔ％塩化マグネシウム水溶液５００ｍｌにＢ
ＫＰ（晒クラフトパルプ）１５ｇを浸漬し、８０℃で約
３０分撹拌した。次に、１．５ｗｔ％水酸化ナトリウム
水溶液１２０ｍｌを加え、ｐｈを１２として、８０℃で
約３０分撹拌し、処理済みの木材パルプ１を得る。処理
済みのパルプ繊維１を実施例１と同様にブレンドし、平
網を用いて抄造し、熱硬化性樹脂を含浸させて試料２１
〜２５を得た。Example 2 B was added to 500 ml of a 1.00 wt% magnesium chloride aqueous solution.
15 g of KP (bleached kraft pulp) was dipped and stirred at 80 ° C. for about 30 minutes. Next, 120 ml of 1.5 wt% sodium hydroxide aqueous solution is added to adjust pH to 12, and the mixture is stirred at 80 ° C. for about 30 minutes to obtain treated wood pulp 1. Sample 21 was prepared by blending treated pulp fibers 1 in the same manner as in Example 1, making a paper using a flat screen, and impregnating it with a thermosetting resin.
~ 25 was obtained.
【００３０】実施例３ ０．０１ｗｔ％塩化マグネシウム水溶液５００ｍｌにＢ
ＫＰ（晒クラフトパルプ）１５ｇを浸漬し、１２０℃で
約３０分撹拌した。次に、０．１ｗｔ％水酸化ナトリウ
ム水溶液１００ｍｌを加え、ｐｈを１１として、１２０
℃で約３０分撹拌し、処理済みの木材パルプ１を得る。
処理済みのパルプ繊維１を実施例１と同様にブレンド
し、平網を用いて抄造し、熱硬化性樹脂を含浸させて試
料３１〜３５を得た。Example 3 B was added to 500 ml of a 0.01 wt% magnesium chloride aqueous solution.
15 g of KP (bleached kraft pulp) was dipped and stirred at 120 ° C. for about 30 minutes. Next, 100 ml of 0.1 wt% sodium hydroxide aqueous solution was added to adjust pH to 11, and 120
Stir at about 30 minutes for about 30 minutes to obtain treated wood pulp 1.
The treated pulp fibers 1 were blended in the same manner as in Example 1, papermaking was performed using a flat screen, and a thermosetting resin was impregnated to obtain samples 31 to 35.
【００３１】実施例４ ０．０５ｗｔ％塩化マグネシウム水溶液５００ｍｌにＢ
ＫＰ（晒クラフトパルプ）１５ｇを浸漬し、１２０℃で
約３０分撹拌した。次に、０．１ｗｔ％水酸化ナトリウ
ム水溶液１３０ｍｌを加え、ｐｈを１１として、１２０
℃で約３０分撹拌し、処理済みの木材パルプ１を得る。
処理済みのパルプ繊維１を実施例１と同様にブレンド
し、平網を用いて抄造し、熱硬化性樹脂を含浸させて試
料４１〜４５を得た。Example 4 B was added to 500 ml of 0.05 wt% magnesium chloride aqueous solution.
15 g of KP (bleached kraft pulp) was dipped and stirred at 120 ° C. for about 30 minutes. Next, 130 ml of 0.1 wt% sodium hydroxide aqueous solution is added to adjust pH to 11, and 120
Stir at about 30 minutes for about 30 minutes to obtain treated wood pulp 1.
The treated pulp fibers 1 were blended in the same manner as in Example 1, paper-making was performed using a flat screen, and a thermosetting resin was impregnated to obtain samples 41 to 45.
【００３２】実施例５ １．００ｗｔ％塩化マグネシウム水溶液５００ｍｌにＢ
ＫＰ（晒クラフトパルプ）１５ｇを浸漬し、１２０℃で
約３０分撹拌した。次に、１．５ｗｔ％水酸化ナトリウ
ム水溶液１２０ｍｌを加え、ｐｈを１１として、１２０
℃で約３０分撹拌し、処理済みの木材パルプ１を得る。
処理済みのパルプ繊維１を実施例１と同様にブレンド
し、平網を用いて抄造し、熱硬化性樹脂を含浸させて試
料５１〜５５を得た。Example 5 B was added to 500 ml of a 1.00 wt% magnesium chloride aqueous solution.
15 g of KP (bleached kraft pulp) was dipped and stirred at 120 ° C. for about 30 minutes. Next, 120 ml of 1.5 wt% sodium hydroxide aqueous solution was added to adjust pH to 11, and 120
Stir at about 30 minutes for about 30 minutes to obtain treated wood pulp 1.
The treated pulp fibers 1 were blended in the same manner as in Example 1, paper-making was performed using a flat screen, and a thermosetting resin was impregnated to obtain samples 51 to 55.
【００３３】従来例 未処理の通常のパルプをストーンビータでＣ．Ｓ．Ｆ．
４００ｍｌ迄叩解して、同じく平網を用いて抄造し、熱
硬化性樹脂を含浸させて従来例の試料６１を得た。Conventional Example Untreated normal pulp was treated with C. S. F.
It was beaten up to 400 ml, similarly made by using a flat mesh, and impregnated with a thermosetting resin to obtain a conventional sample 61.
【００３４】比較例 更に、比較例として実施例１の処理済みのパルプ繊維１
のみを同じく平網を用いて抄造し、比較例の試料７１を
得た。Comparative Example Further, as a comparative example, the treated pulp fiber 1 of Example 1 was used.
Only the same was used to make a paper, and a sample 71 of Comparative Example was obtained.
【００３５】上記各実施例で得た試料並びに従来例の試
料について、密度、動的弾性率、吸水率、内部損失を、
夫々測定した。動的弾性率及び内部損失は振動リード法
により算出した。又、吸水率は、ＪＩＳ Ｐ８００２に
準拠した方法による。測定結果の１例として、実施例１
の試料１１〜１５の密度、動的弾性率、吸水率、内部損
失を表１に示す。The density, the dynamic elastic modulus, the water absorption rate, and the internal loss of the samples obtained in the above-mentioned examples and the samples of the conventional examples are
I measured each. The dynamic elastic modulus and internal loss were calculated by the vibration lead method. The water absorption rate is based on the method according to JIS P8002. As an example of the measurement result, Example 1
Table 1 shows the density, dynamic elastic modulus, water absorption, and internal loss of Samples 11 to 15.
【００３６】[0036]
【表１】 [Table 1]
【００３７】又、各実施例の中の、超叩解パルプの添加
量が異なる５種類の試料の中から、動的弾性率、並びに
内部損失が当該実施例中で最も大きい試料をその実施例
の代表として選び、各実施例の代表的試料及び従来例試
料、並びに、比較例試料、計７種の試料についての密
度、動的弾性率、吸水率、内部損失を表２に示す。Further, among the five kinds of samples having different addition amounts of super-beaten pulp in each example, the sample having the largest dynamic elastic modulus and internal loss in the example was selected as the sample of the example. Table 2 shows the density, dynamic elastic modulus, water absorption rate, and internal loss of a representative sample of each example, a conventional sample, a comparative sample, and a total of seven samples selected as a representative.
【００３８】[0038]
【表２】 [Table 2]
【００３９】本発明のシート材料は、いずれも従来例と
比較した場合、密度、動的弾性率、内部損失が夫々大き
く、吸水率は約３４〜４９％と低くなっている。スピー
カの周波数特性の良否に関与する高域での振動による撓
み変形度合いの目安となる「動的弾性率／密度」は約１
７〜２４％大きくなり、ボイスコイルとボイスコイルボ
ビン材料との接着が強固に維持できる。又、高域周波数
での過度特性の良否の目安となる内部損失は約１７〜２
０％大きくなり、制振性に優れ、コーン紙をリニアに振
動させ、ボイスコイルボビン材料として従来例より優れ
ていることを示唆している。When compared with the conventional example, the sheet material of the present invention has a large density, a high dynamic elastic modulus and a large internal loss, and a low water absorption rate of about 34 to 49%. "Dynamic elastic modulus / density", which is a measure of the degree of flexural deformation due to vibration in the high range that is related to the quality of the speaker's frequency characteristics, is about 1
It becomes 7 to 24% larger, and the adhesion between the voice coil and the voice coil bobbin material can be firmly maintained. In addition, the internal loss that is a measure of the quality of the transient characteristics at high frequencies is about 17 to 2
It is 0% larger, excellent in vibration damping property, linearly vibrates the cone paper, suggesting that it is superior to the conventional example as a voice coil bobbin material.
【００４０】又、実施例１から超叩解木材パルプを除い
た試料７１は、実施例１と比較して動的弾性率、吸水率
及び内部損失のすべてに於て劣っているが、吸水率では
従来例より優れている。このことは、本発明に於けるル
ーメン（内腔部）内部に無機質の難水溶性結晶を析出さ
せたパルプ繊維が耐濕特性が優れると共に、超叩解木材
パルプの役割が重要であることを示唆している。Further, the sample 71 obtained by removing the super-beaten wood pulp from Example 1 is inferior to Example 1 in all of the dynamic elastic modulus, the water absorption rate and the internal loss, but in the water absorption rate, It is superior to the conventional example. This suggests that the pulp fiber in which the inorganic poorly water-soluble crystals are deposited inside the lumen (lumen) of the present invention has excellent moat resistance and the role of super-beaten wood pulp is important. are doing.
【００４１】以上本発明の代表的と思われる実施例をス
ピーカのボイスコイルについて説明したが、本発明は必
ずしもこれらの実施例構造のみに限定されるものではな
く、本発明にいう前記の構成要件を備え、かつ、本発明
にいう目的を達成し、以下にいう効果を有する範囲内に
おいて、他の電気音響変換器用のボイスコイル（ムービ
ングコイル）等に適宜改変して実施することができるも
のである。Although the voice coil of the speaker has been described with reference to the embodiments considered to be representative of the present invention, the present invention is not necessarily limited to the structures of these embodiments, and the above-mentioned constituents of the present invention are not limited thereto. And a voice coil (moving coil) for other electroacoustic transducers, etc., can be appropriately modified and carried out within a range that achieves the object of the present invention and has the following effects. is there.
【００４２】[0042]
【発明の効果】以上の説明から既に明らかなように、本
発明にいう電気音響変換器用ボイスコイルボビン５を構
成するシート材料は、パルプ繊維のルーメン（内腔部）
内部に無機質の難水溶性結晶を析出させたパルプ繊維
と、超叩解木材パルプとがブレンドされ、更に、熱硬化
性樹脂が含浸されている。As apparent from the above description, the sheet material constituting the voice coil bobbin 5 for electroacoustic transducer according to the present invention is made of pulp fiber lumen (lumen portion).
Pulp fibers having an inorganic, hardly water-soluble crystal deposited therein and ultra-beaten wood pulp are blended, and further impregnated with a thermosetting resin.
【００４３】従って、本発明の振動系部品を使用したス
ピーカは、前記難水溶性結晶を析出させたパルプ繊維及
び含浸させた熱硬化性樹脂の作用により相対湿度の変化
に伴う寸法安定性に優れ、環境条件の変化に対し品質が
安定していると言う特徴を有する。Therefore, the speaker using the vibration system component of the present invention is excellent in dimensional stability associated with changes in relative humidity due to the action of the pulp fiber in which the hardly water-soluble crystals are deposited and the impregnated thermosetting resin. The characteristic is that the quality is stable against changes in environmental conditions.
【００４４】又、動的弾性率も向上していることから、
駆動力の伝達は完全であり、能率低下を防ぐと共に、周
波数特性の高域限界周波数も高くなり、高能率、高忠実
度の再生音を有するスピーカが得られる。Since the dynamic elastic modulus is also improved,
The transmission of the driving force is perfect, the efficiency is prevented from being lowered, and the high frequency limit frequency of the frequency characteristic is also increased, so that a speaker having a reproduced sound of high efficiency and high fidelity can be obtained.
【００４５】更に、超叩解木材パルプがブレンドされて
いて繊維相互間の摩擦抵抗が向上するため高内部損失を
保ち、電気音響変換器用ボイスコイルボビン自体の異常
共振が抑制されるので、過度特性が良好な明瞭な音質を
持つスピーカが得られる。Furthermore, since the super-beaten wood pulp is blended to improve the frictional resistance between the fibers, a high internal loss is maintained, and abnormal resonance of the voice coil bobbin for the electroacoustic transducer is suppressed, resulting in good transient characteristics. A speaker with clear sound quality can be obtained.
【００４６】以上の諸結果から、本発明の電気音響変換
器用ボイスコイルボビン５は、相対湿度の変化に伴う寸
法安定性に優れ、周波数特性の高域限界周波数が高くて
再生帯域が広く、過渡特性が良好なことから、忠実度が
高く、明瞭な音質の再生音が得られ、且つ環境条件の変
化に対し品質が安定しているスピーカを提供できると言
う効果を期待することが出来るに至ったのである。From the above results, the voice coil bobbin 5 for an electroacoustic transducer of the present invention is excellent in dimensional stability due to changes in relative humidity, has a high high frequency limit frequency frequency, a wide reproduction band, and transient characteristics. It is possible to expect an effect that a speaker with high fidelity, clear reproduced sound quality, and stable quality with respect to changes in environmental conditions can be provided. Of.
【図１】本発明の実施例のパルプ繊維の構造を示す説明
図。FIG. 1 is an explanatory view showing a structure of pulp fiber according to an embodiment of the present invention.
【図２】実施例のシート材料の構造を示す一部拡大断面
図。FIG. 2 is a partially enlarged cross-sectional view showing the structure of the sheet material of the example.
【図３】本発明の電気音響変換器用ボイスコイルボビン
を使用した振動系の要部斜視図。FIG. 3 is a perspective view of an essential part of a vibration system using a voice coil bobbin for an electroacoustic transducer of the present invention.
【図４】従来のスピーカの断面図。FIG. 4 is a sectional view of a conventional speaker.
１ パルプ繊維 ２ 難水溶性結晶 ３ 超叩解パルプ ４ 熱硬化性樹脂 ５ 電気音響変換器用ボイスコイルボビン ６ 振動系 ７ 磁気回路 ８ フレーム 1 Pulp fiber 2 Poorly water-soluble crystal 3 Super-beaten pulp 4 Thermosetting resin 5 Voice coil bobbin for electroacoustic transducer 6 Vibration system 7 Magnetic circuit 8 Frame
Claims (9)
内部に、無機質の難水溶性結晶(2)を析出させたパルプ
繊維(1)と、超叩解木材パルプ(3)とがブレンドされた複
合素材に、熱硬化性樹脂(4)を含浸して熱プレス成形し
て得たシート材料からなることを特徴とする電気音響変
換器用ボイスコイルボビン。1. A pulp fiber (1) having an inorganic poorly water-soluble crystal (2) deposited inside a lumen (lumen) (1a) of pulp fiber and a super-beaten wood pulp (3) A voice coil bobbin for an electroacoustic transducer, comprising a sheet material obtained by impregnating a blended composite material with a thermosetting resin (4) and performing hot press molding.
性結晶(2)が、木材パルプを無機塩水溶液中で加熱浸漬
処理した後、アルカリ加熱することにより得ることを特
徴とする請求項１記載の電気音響変換器用ボイスコイル
ボビン。2. The inorganic sparingly water-soluble crystal (2) inside the lumen (1a) is obtained by subjecting wood pulp to heat-immersion treatment in an aqueous solution of an inorganic salt, followed by heating with alkali. 1. A voice coil bobbin for an electroacoustic transducer according to 1.
ことを特徴とする請求項２記載の電気音響変換器用ボイ
スコイルボビン。3. The voice coil bobbin for an electroacoustic transducer according to claim 2, wherein the inorganic salt is an alkaline earth metal salt.
を特徴とする請求項２記載の電気音響変換器用ボイスコ
イルボビン。4. The voice coil bobbin for an electroacoustic transducer according to claim 2, wherein the inorganic salt is a magnesium salt.
℃以上であり、且つ、無機塩水溶液の濃度が０．０１ｗ
ｔ％以上であることを特徴とする請求項２記載の電気音
響変換器用ボイスコイルボビン。5. The heating temperature in the inorganic salt aqueous solution is 50.
℃ or more, and the concentration of the inorganic salt aqueous solution is 0.01w
It is t% or more, The voice coil bobbin for electroacoustic transducers of Claim 2 characterized by the above-mentioned.
上であり、且つ、ｐｈが１０〜１２であることを特徴と
する請求項２記載の電気音響変換器用ボイスコイルボビ
ン。6. The voice coil bobbin for an electroacoustic transducer according to claim 2, wherein the heating temperature of the alkali heating is 50 ° C. or higher and the ph is 10 to 12.
ナイザにより叩解され、且つ、そのフリーネスが１００
〜１５０ｍｌであることを特徴とする請求項２記載の電
気音響変換器用ボイスコイルボビン。7. The super-beaten wood pulp (3) is beaten by a high-pressure homogenizer and has a freeness of 100.
The voice coil bobbin for an electroacoustic transducer according to claim 2, wherein the voice coil bobbin is about 150 ml.
絶乾パルプ繊維(1)に対して１．００ｗｔ％〜１０．０
０ｗｔ％の範囲であることを特徴とする請求項１記載の
電気音響変換器用ボイスコイルボビン。8. The addition rate of the super-beaten wood pulp (3) is
1.00 wt% to 10.0 with respect to bone-dry pulp fiber (1)
The voice coil bobbin for an electroacoustic transducer according to claim 1, wherein the range is 0 wt%.
脂、又はフェノール樹脂、又は不飽和ポリエステル樹
脂、又はメラミン樹脂、又はエポキシ樹脂の中から選ば
れた熱硬化性樹脂であることを特徴とする請求項１記載
の電気音響変換器用ボイスコイルボビン。9. The thermosetting resin (4) is a thermosetting resin selected from a silicone resin, a phenol resin, an unsaturated polyester resin, a melamine resin, or an epoxy resin. The voice coil bobbin for an electroacoustic transducer according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26953195A JPH0993694A (en) | 1995-09-22 | 1995-09-22 | Voice coil bobbin for electroacoustic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26953195A JPH0993694A (en) | 1995-09-22 | 1995-09-22 | Voice coil bobbin for electroacoustic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0993694A true JPH0993694A (en) | 1997-04-04 |
Family
ID=17473691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26953195A Pending JPH0993694A (en) | 1995-09-22 | 1995-09-22 | Voice coil bobbin for electroacoustic transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0993694A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009055337A (en) * | 2007-08-27 | 2009-03-12 | Victor Co Of Japan Ltd | Voice coil and speaker |
-
1995
- 1995-09-22 JP JP26953195A patent/JPH0993694A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009055337A (en) * | 2007-08-27 | 2009-03-12 | Victor Co Of Japan Ltd | Voice coil and speaker |
| US8160291B2 (en) | 2007-08-27 | 2012-04-17 | Victor Company Of Japan, Limited | Voice coil and speaker |
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