JPH0984176A - Parts for electroacoustic transducer - Google Patents
Parts for electroacoustic transducerInfo
- Publication number
- JPH0984176A JPH0984176A JP7266449A JP26644995A JPH0984176A JP H0984176 A JPH0984176 A JP H0984176A JP 7266449 A JP7266449 A JP 7266449A JP 26644995 A JP26644995 A JP 26644995A JP H0984176 A JPH0984176 A JP H0984176A
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- diaphragm
- electroacoustic transducer
- wood 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.)
- Granted
Links
Landscapes
- Paper (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、オーディオ機器の
分野に於ける電気音響変換器用部品に関し、特にスピー
カの振動板、ダストキャップ等の振動系の部品の構成材
料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component for an electroacoustic transducer in the field of audio equipment, and more particularly to a constituent material of a vibration system component such as a speaker diaphragm and a dust cap.
【０００２】[0002]
【従来の技術】従来の動電型のスピーカは、図５に全体
の断面構造を示すように、コーン型振動板４ａ、ボイス
コイル４ｂ、ダストキャツプ４ｄ等からなる振動系４
が、底部に磁気回路５が固定されたフレーム３の内部
に、エッジ４ｃによって振動可能に支持されている。ボ
イスコイル４ｂは磁気回路５の磁気空隙５ａに挿入され
てスピーカの駆動系を構成する。或いは、図６に振動系
４′として示すように、振動板が球面状のドーム型振動
板４ａ′を使用した、高域再生を主目的としたスピーカ
が存在する。2. Description of the Related Art A conventional electrodynamic speaker has a vibration system 4 including a cone type diaphragm 4a, a voice coil 4b, a dust cap 4d, etc., as shown in FIG.
Is oscillatably supported by the edge 4c inside the frame 3 having the magnetic circuit 5 fixed to the bottom. The voice coil 4b is inserted in the magnetic gap 5a of the magnetic circuit 5 to form a speaker driving system. Alternatively, as shown as a vibrating system 4'in FIG. 6, there is a speaker mainly using a dome-shaped vibrating plate 4a 'whose vibrating plate is spherical for the purpose of reproducing high frequencies.
【０００３】この様なスピーカの振動系の主体を成すコ
ーン型振動板４ａ、ドーム型振動板４ａ′は、振動する
ことによってその表面から直接に音波を放射する構造と
なっており、スピーカの再生音の品質に大きな影響を与
える振動モードを制御する構成材料の性質として高弾
性、高内部損失であることが要求される。従来から振動
板用材料として種々の材料が検討、開発されて来たが、
この両性質をバランスよく兼備し、安価で且つ量産性に
優れた材料として植物性パルプから製した紙が多用され
ている。又、ダストキャツプ４ｄは、本来は磁気空隙５
ａ内に塵埃等の侵入を防止するための部品であるが、振
動板の中心にあって振動モードに影響を与え、自身も音
波を放射するので振動板に準じて扱われ、材料として振
動板と同等によく検討された紙を使用したものが存在す
る。The cone type diaphragm 4a and the dome type diaphragm 4a ', which are the main components of the vibration system of such a speaker, have a structure in which sound waves are directly emitted from the surface by vibrating. High elasticity and high internal loss are required as the properties of the constituent material that controls the vibration mode that greatly affects the sound quality. Conventionally, various materials have been studied and developed as materials for diaphragms.
Paper made from vegetable pulp is often used as a material that has both of these properties in a well-balanced manner and is inexpensive and excellent in mass productivity. Also, the dust cap 4d is originally a magnetic gap 5.
Although it is a part to prevent dust and other foreign matter from entering the inside of a, it is treated in the same manner as the diaphragm because it affects the vibration mode at the center of the diaphragm and also emits sound waves. There are papers that have been considered as well as.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の木材パルプ
からなる紙製の振動板並びにダストキャツプは、近年の
デジタル対応のスピーカでは、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
填剤は自身では高剛性であるが、その大部分が繊維表面
上に吸着しているだけなのでパルプの叩解時に脱落し、
紙の剛性付与として有効に作用しない。又、紙の内部損
失は繊維相互間の摩擦抵抗に起因しているため、通常の
叩解機で叩解したパルプではあまり向上しないと言う解
決すべき課題があった。DISCLOSURE OF INVENTION Problems to be Solved by the Invention The conventional paper-made diaphragm and dust cap made of wood pulp are not sufficient in the rigidity of the pulp for a recent digital speaker, and the drawbacks are solved. For this purpose, inorganic fillers such as calcium carbonate and titanium dioxide are filled on the surface of the pulp fibers and between the fibers.The inorganic fillers themselves have high rigidity, but most of them are on the fiber surface. Since it is only adsorbed on, it falls off when the pulp is beaten,
It does not act effectively as a paper rigidity imparter. Further, since the internal loss of the paper is caused by the frictional resistance between the fibers, there is a problem to be solved that the pulp beaten with a normal beater does not improve much.
【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、併せて超叩解木材パルプを混合することで、高剛性
と相対湿度の変化に対する寸法安定性並びに高内部抵抗
を有する振動板やダストキャツプ等の電気音響変換器用
部品を提供する事を目的とする。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 Electro-acoustic conversion of diaphragms, dust caps, etc. with high rigidity and dimensional stability against changes in relative humidity, and high internal resistance by precipitating inorganic poorly water-soluble crystals together with super-beaten wood pulp. The purpose is to provide dexterity parts.
【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
本発明にいうスピーカ部品を、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材料からなることを特徴とする振
動板、ダストキヤップ等の電気音響変換器用部品であ
る。The speaker component according to the present invention for achieving the above object will be described with reference to the reference numerals used in the embodiments. The first invention is the lumen of pulp fiber (inner cavity). Part) 1a is made of a composite material in which a pulp fiber 1 in which an inorganic poorly water-soluble crystal 2 is deposited and a super-beaten wood pulp 3 are blended, and a diaphragm, a dust cap, etc. It is a component for an acoustic transducer.
【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部品で
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 a component for an 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
響変換器用部品である。A third aspect of the present invention is the electroacoustic transducer component according to the second aspect, 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
換器用部品である。A fourth invention is an electroacoustic transducer component 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部品である。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. It is a component 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請求項２記載の電気
音響変換器用部品である。A sixth aspect of the present invention is the electroacoustic transducer according to the second aspect, wherein the heating temperature of the alkali heating is 50 ° C. or higher and the ph is 10 to 12. It is a dexterous part.
【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ーにより叩解さ
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部品である。A seventh invention is the electroacoustic transducer part 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. Is.
【００１３】[0013]
【発明の実施の形態】本発明のスピーカ部品の実施の形
態について、図１、図２、乃至、図３、図４に基づいて
説明する。本発明の振動板、ダストキヤップ等の電気音
響変換器用部品を構成する複合材料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１ｂ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
は所々にルーメン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 speaker component of the present invention will be described with reference to FIGS. 1, 2 and 3 and 4. As shown in FIG. 1, the pulp fiber 1 which is one of the main materials of the composite material constituting the components for electroacoustic transducers such as the diaphragm and the dust cap of the present invention has a cylindrical pulp fiber wall 1b and the pulp. The pulp fiber wall 1b has a lumen 1a surrounded by the fiber wall 1b, and the pulp fiber wall 1b has pores 1c for connecting the lumen 1a to the outside.
【００１４】本発明に係る複合材料は、図２の組織構造
図に示すように、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８０〜１２
０℃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１００〜１５０ｍｌとなるまで叩解した超叩解木
材パルプ３とからなる。In the composite material according to the present invention, as shown in the structural diagram of FIG. 2, the raw material wood pulp is mixed with an alkaline earth metal salt such as magnesium salt at a concentration of 0.01 to 0.01%.
In a 1.0 wt% inorganic salt aqueous solution, the temperature is 50 ° C or higher,
After heat-immersion treatment with an inorganic salt at preferably 80 to 120 ° C., the heating temperature is 50 ° C. or higher, preferably 80 to 12
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 at 0 ° C. and a pH of 10 to 12 (see FIG. (Partial enlarged view a) and a part of pulp fiber 1 that has been subjected to the same treatment is beaten by a high-pressure homogenizer until the freeness becomes 100 to 150 ml, and super-beaten wood pulp 3 is obtained.
【００１５】次いで、上記無機塩加熱浸漬ならびにアル
カリ加熱処理してルーメン１ａ中に難水溶性結晶２が析
出されているパルプ繊維１をパルパー（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部品形状
に抄造することにより得られる。この様な複合材料は同
図の一部断面拡大図ｂに示すような組織構造となってい
る。Next, the pulp fiber 1 in which the poorly water-soluble crystals 2 are precipitated in the lumen 1a after being subjected to the above-mentioned inorganic salt heat dipping and alkali heat treatment is treated with a pulper (disaggregator).
S. F. It is obtained by disintegrating to 670 ml, blending the above-mentioned super-beaten wood pulp 3 and making into a part shape by an ordinary paper machine. Such a composite material has a texture structure as shown in a partially enlarged sectional view b of FIG.
【００１６】パルプ繊維１の処理に際し、浸漬、加熱温
度が５０℃以下であればパルプ繊維の膨潤が不十分で、
無機塩水溶液ルーメン１ａ内への浸透が十分でなく、１
２０℃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、水酸化カリゥム、水
酸化リチウム等が用いられる。When the pulp fiber 1 is treated, if the temperature of immersion and heating is 50 ° C. or less, the swelling of the pulp fiber is insufficient,
Permeation into the lumen 1a of the inorganic salt solution is not sufficient, and 1
At 20 ° C. or higher, the pulp fiber component is decomposed and eluted, and the hardly water-soluble crystals 2 are difficult to be uniformly formed. 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.
【００１７】上記抄造された複合材料は、外形を整形
し、必要に応じて金型によりプレス成形後に外形を整形
して振動板、ダストキヤップ等の電気音響変換器用部品
となる。当該電気音響変換器用部品は、その形状によっ
て、図３に示すものはコーン型振動板Ｂとダストキャツ
プＣであり、図４に示すものはドーム型振動板Ａであ
る。いずれもその半断面がボイスコイル４ｂ等と関連付
けて図示されている。The composite material produced as described above is shaped into an outer shape, and if necessary, press-molded with a mold and then the outer shape is shaped into a component for an electroacoustic transducer such as a diaphragm or a dust cap. The electro-acoustic transducer component has a cone type diaphragm B and a dust cap C shown in FIG. 3 and a dome type diaphragm A shown in FIG. In each case, the half section is shown in association with the voice coil 4b and the like.
【００１８】本発明の上記複合材料は、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 above composite material of the present invention is intended to modify pulp by a two-step treatment. Normally, pulp at room temperature is strongly bonded by hydrogen bonds, but in the first step, by immersing the pulp in a high-temperature inorganic salt aqueous solution, the pulp fibers are likely to swell and the aqueous solution of inorganic salt reaches the lumen 1a. Penetrate enough.
【００１９】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ために相対湿度
の変化に伴う寸法安定性に優れ、ルーメン内に難溶性結
晶２を生ずることにより剛性が高くなる。Next, as a second step, by adding an alkali, the alkali successively penetrates into the pulp fiber wall 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.
Water adsorption sites below angstrom occur, water is adsorbed to this part, the interaction between water and cellulose in the pulp fiber wall is strengthened, and the water adsorption rate increases, so dimensional stability accompanying changes in relative humidity And the rigidity is increased by forming the hardly soluble crystal 2 in the lumen.
【００２０】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。Next, the inner cylinder is arranged inside the outer cylinder through a narrow slit, the wet pulp is pushed at a 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.
【００２１】[0021]
【実施例】以下本発明電気音響変換器用部品の実施例
を、成形前の複合材料を主体に、具体的に説明する。EXAMPLES Examples of electroacoustic transducer parts according to the present invention will be specifically described below by mainly using a composite material before molding.
【００２２】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 1 B was added to 500 ml of a 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.
【００２３】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、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. By disintegrating to 670 ml, a part of the disintegrated pulp is pressed with high pressure wet pulp into a narrow slit between the outer cylinder and the inner cylinder, the outer cylinder and the inner cylinder are rotated in opposite directions, and this is repeated several times. , 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.
【００２４】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、図４に示すドーム型振動板の抄網を用いて
抄造し、試料１１〜１５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 was carried out using the dome-type vibrating plate papermaking machine shown in FIG. 4 to obtain samples 11 to 15.
【００２５】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て、
同じくドーム振動板の抄網を用いて抄造し、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. Blend the treated pulp fiber 1 as in Example 1,
Similarly, using the dome diaphragm mesh, samples 21 to
25 was obtained.
【００２６】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
て、同じくドーム振動板の抄網を用いて抄造し、試料３
１〜３５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.
Sample 3 was prepared by blending treated pulp fibers 1 in the same manner as in Example 1 and making a paper by using a mesh made of a dome diaphragm.
1-35 were obtained.
【００２７】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
て、同じくドーム振動板の抄網を用いて抄造し、試料４
１〜４５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 fiber 1 was blended in the same manner as in Example 1 and was made into a paper by using a paper net of a dome diaphragm in the same manner.
1-45 were obtained.
【００２８】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
て、同じくドーム振動板の抄網を用いて抄造し、試料５
１〜５５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 fiber 1 was blended in the same manner as in Example 1 and was made into a paper by using a paper making network of a dome diaphragm in the same manner.
1-55 were obtained.
【００２９】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、同じくドーム振動板の抄網を用
いて抄造し、従来例の試料６１を得た。Conventional Example Untreated ordinary pulp was treated with C. S. F.
It was beaten to 400 ml and was made into paper by using a net made of a dome diaphragm in the same manner to obtain Sample 61 of the conventional example.
【００３０】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
のみを同じくドーム振動板の抄網を用いて抄造し、比較
例の試料７１を得た。Comparative Example Furthermore, as a comparative example, the treated pulp fiber 1 of Example 1 was used.
Only the same was machined using a dome diaphragm mesh to obtain a sample 71 of a comparative example.
【００３１】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.
【００３２】[0032]
【表１】 [Table 1]
【００３３】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。In each of the examples, the sample having the highest dynamic elastic modulus and internal loss among the five types of samples having different amounts of super-beaten pulp added 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.
【００３４】[0034]
【表２】 [Table 2]
【００３５】本発明の複合材料は、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３３〜４２％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振動板の剛性の目安と
なる「動的弾性率／密度」は約１６〜２２％、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１６〜
２０％と大きく、振動板材料として従来例より優れてい
ることを示唆している。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。此のことは、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。When compared with the conventional example, the composite 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 33 to 42%. The "dynamic elastic modulus / density", which is a measure of the rigidity of the diaphragm that is related to the quality of the frequency characteristics of the speaker, is about 16 to 22%, and the internal loss that is a measure of the quality of the transient characteristics at high frequencies is about 16%. ~
It is as large as 20%, suggesting that it is superior to the conventional example as a diaphragm material. Further, the sample 71 obtained by removing the super-beaten wood pulp from the example 1 is inferior to the example 1 in all of the dynamic elastic modulus, the water absorption rate and the internal loss,
The water absorption rate is superior to the conventional example. This means that the pulp fiber in which the inorganic poorly water-soluble crystal is deposited inside the lumen (lumen) in the present invention has excellent moat resistance,
It suggests that the role of super-beaten wood pulp is important.
【００３６】以上本発明の代表的と思われる実施例を、
スピーカ用振動板及びダストキヤップについて説明した
が、本発明は必ずしもこれらの実施例のみに限定される
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部品に適宜改変
して実施することができるものである。The examples considered to be typical of the present invention are as follows.
Although the diaphragm for the speaker and the dust cap have been described, the present invention is not necessarily limited to only these examples, and has the above-mentioned constituents referred to in the present invention, and achieves the object referred to in the present invention. , Other electroacoustic transducer parts can be appropriately modified and implemented within a range having the following effects.
【００３７】[0037]
【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部品を構成する複合材料
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ている。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。As is apparent from the above description, the composite material constituting the electroacoustic transducer component according to the present invention deposits an inorganic water-insoluble crystal inside the lumen (lumen) of pulp fiber. The pulp fiber thus made is blended with the super-beaten wood pulp. Therefore, the speaker using the vibration system component of the present invention is excellent in dimensional stability due to the change in relative humidity due to the action of the pulp fiber in which the hardly water-soluble crystals are deposited, and the quality is stable against changes in environmental conditions. It has the characteristic that
【００３８】又、動的弾性率も向上していることから、
周波数特性の高域限界周波数が高くなり、再生帯域の広
い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 high-frequency limit frequency of the frequency characteristic becomes high, and a speaker having a reproduced sound with a wide reproduction band and high fidelity can be obtained.
【００３９】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、高域に於ける分割振動が抑制されので、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。以上の
諸結果から、本発明の電気音響変換器用部品は、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、過度特性が良好なこ
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。Furthermore, since the super-beaten wood pulp is blended to improve the frictional resistance between the fibers, a high internal loss is maintained, and the division vibration in the high range is suppressed, so that a clear sound quality with good transient characteristics is obtained. A speaker with is obtained. From the above results, the electroacoustic transducer component of the present invention is excellent in dimensional stability due to changes in relative humidity, has a high reproduction frequency band with a high high limit frequency of frequency characteristics, and good transient characteristics. , High fidelity, clear playback sound can be obtained,
Moreover, it is possible to expect an effect that it is possible to provide a speaker whose quality is stable against changes in environmental conditions.
【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】実施例の複合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 composite material of the example.
【図３】本発明のスピーカ部品による振動系の実施形態
の半断面図。FIG. 3 is a half sectional view of an embodiment of a vibration system according to the speaker component of the present invention.
【図４】本発明のスピーカ部品による振動系の他の実施
形態の半断面図。FIG. 4 is a half cross-sectional view of another embodiment of the vibration system according to the speaker component of the present invention.
【図５】従来のスピーカの断面図。FIG. 5 is a sectional view of a conventional speaker.
【図６】従来のスピーカの他の形態の振動系の断面図。FIG. 6 is a cross-sectional view of another vibration system 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 振動系 ５ 磁気回路 Ａ ドーム型振動板 Ｂ コーン型振動板 Ｃ ダストキャップ 1 Pulp fiber 2 Poorly water-soluble crystal 3 Super-beaten pulp 4 Vibration system 5 Magnetic circuit A Dome type diaphragm B Cone type diaphragm C Dust cap
Claims (7)
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
合材料からなることを特徴とする振動板、ダストキヤッ
プ等の電気音響変換器用部品。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) Parts for electro-acoustic transducers such as diaphragms and dust caps, which are made of blended composite materials.
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
とする振動板、ダストキヤップ等の請求項１記載の電気
音響変換器用部品。2. A vibrating plate, characterized in that the inorganic poorly 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 and then heating with alkali. The electroacoustic transducer component according to claim 1, such as a dust cap.
ことを特徴とする振動板、ダストキヤップ等の請求項２
記載の電気音響変換器用部品。3. A diaphragm, a dust cap, etc., wherein the inorganic salt is an alkaline earth metal salt.
Parts for the electroacoustic transducer described.
を特徴とする振動板、ダストキヤップ等の請求項２記載
の電気音響変換器用部品。4. The component for an electroacoustic transducer according to claim 2, wherein the inorganic salt is a magnesium salt, such as a diaphragm and a dust cap.
℃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振動板、ダストキヤッ
プ等の請求項２記載の電気音響変換器用部品。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
The component for an electroacoustic transducer according to claim 2, which is a diaphragm, a dust cap, or the like, characterized in that the content is t% or more.
上であり、且つ、ｐｈが１０〜１２であることを特徴と
する振動板、ダストキヤップ等の請求項２記載の電気音
響変換器用部品。6. The electroacoustic transducer component according to claim 2, wherein the heating temperature of the alkali heating is 50 ° C. or higher, and the ph is 10 to 12, such as a diaphragm and a dust cap.
ナイザーにより叩解され、且つ、そのフリーネスが１０
０〜１５０ｍｌであることを特徴とする振動板、ダスト
キヤップ等の請求項２記載の電気音響変換器用部品。7. The super-beaten wood pulp (3) is beaten by a high-pressure homogenizer and has a freeness of 10
The electroacoustic transducer component according to claim 2, which is a diaphragm, a dust cap, or the like, which is 0 to 150 ml.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26644995A JP3570040B2 (en) | 1995-09-19 | 1995-09-19 | Electroacoustic transducer parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26644995A JP3570040B2 (en) | 1995-09-19 | 1995-09-19 | Electroacoustic transducer parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0984176A true JPH0984176A (en) | 1997-03-28 |
| JP3570040B2 JP3570040B2 (en) | 2004-09-29 |
Family
ID=17431098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26644995A Expired - Lifetime JP3570040B2 (en) | 1995-09-19 | 1995-09-19 | Electroacoustic transducer parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3570040B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007099865A1 (en) * | 2006-03-01 | 2007-09-07 | Matsushita Electric Industrial Co., Ltd. | Method for manufacturing component for speaker by papermaking, copmponent for speaker by papermaking, vibrating plate for speaker, subcone for speaker, dust cap for speaker, and speaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04339496A (en) * | 1991-05-16 | 1992-11-26 | Matsushita Electric Ind Co Ltd | Diaphragm for loudspeaker |
| JPH06136679A (en) * | 1992-10-28 | 1994-05-17 | Nippon Kamiparupu Kenkyusho:Kk | Method for modifying pulp |
| JPH06311595A (en) * | 1993-04-26 | 1994-11-04 | Foster Electric Co Ltd | Diaphragm for electro-acoustic transducer |
-
1995
- 1995-09-19 JP JP26644995A patent/JP3570040B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04339496A (en) * | 1991-05-16 | 1992-11-26 | Matsushita Electric Ind Co Ltd | Diaphragm for loudspeaker |
| JPH06136679A (en) * | 1992-10-28 | 1994-05-17 | Nippon Kamiparupu Kenkyusho:Kk | Method for modifying pulp |
| JPH06311595A (en) * | 1993-04-26 | 1994-11-04 | Foster Electric Co Ltd | Diaphragm for electro-acoustic transducer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007099865A1 (en) * | 2006-03-01 | 2007-09-07 | Matsushita Electric Industrial Co., Ltd. | Method for manufacturing component for speaker by papermaking, copmponent for speaker by papermaking, vibrating plate for speaker, subcone for speaker, dust cap for speaker, and speaker |
| US8144912B2 (en) | 2006-03-01 | 2012-03-27 | Panasonic Corporation | Manufacturing method of paper making part for loudspeaker, paper making part for loudspeaker, diaphragm for loudspeaker, sub cone for loudspeaker, dust cap for loudspeaker and loudspeaker |
| US8428283B2 (en) | 2006-03-01 | 2013-04-23 | Panasonic Corporation | Manufacturing method of paper making part for loudspeaker, paper making part for loudspeaker, diaphragm for loudspeaker, sub cone for loudspeaker, dust cap for loudspeaker and loudspeaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3570040B2 (en) | 2004-09-29 |
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