200541373 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種揚聲ι§用振動板的構造，係在揚聲 為中’具有發射音波之功能的組件。 【先前技術】 習知之揚聲器係由，將電性訊號能量轉換成機械性的 振動能量之機電感測器與、藉由來自該機電感測器所輸出 的機械振動能量所驅動而振動，以發射聲波能（ac〇ustic energy)之振動板之如習知之主構件所構成。第i圖中， 如上述將一般的揚聲器之振動板構造與周邊構件同時以模 型之形態表示時，係在振動板丨的中心安裝音圈3，並利 用振動板！之外周具有撓性邊緣2，或藉由振動板之中心 邛同樣具有撓性之擋板4，在各個框架（省略圖示）内側 以維持可自由振動的方式。然後，音圈3餘人在磁性電 路（同樣地省略圖示）的磁場中，並藉由在該音 入 =電流的方式，令振動板μ中心部驅動並振動， 射音波。 【發明内容】 (發明所欲解決的問題） ，…丨土 π 丁 7 m切败j的外周部盥 二：：相位進行振動時，雖在一般的可聽頻帶中、，再 由二=率特性構成平坦，且可得良好的音質， =振動板本身係具有撓性，所以，當驅 變 相對於中心部使得外周部附近的相位延遲，並二::: 315938 5 200541373 ，率7中〜邛與外周部在逆相中振動，而使所發射的音波相 互抵鎖ϋ在頻率特性上產生傾斜，又或者是，在某一頻 率中’、在外周部附近或振動板面的特定部分產生強烈共振 而生=波峰，俾使再生音的音質劣化。尤其是，如上述方 式：振動板1分開共振的現象，一般係由於振動材 非對稱弓曲振動使得高次譜波失真之原因為多，但如上所 f在分開振動中，振動板之形狀及材料物性的干預，尤其 =已去曰對於被度與揚氏模量及tan(5 (亦即材料的機 械性内部損失）與頻率 械 性值賦予較大的，1: 曲程度所構成代表性的物 於明朗作i p a且5亥夺物性值的指示方向也漸漸趨 為了八Μί貫際的材料巾，雖實現了技術性的要求，而 2二再生音質變佳之頻率特性的平坦化，因此，在揚取 動°板：=之際’便必需解決所謂「需要耗費太多努力在推 動板材料的開發」之問題。 π刀在振 材料的立π本《月的目的，係為了解決由上述課題的振動 材科的立場，而著眼於，具 嘴7振動 的合成樹脂、與具有優異物性值之木材等:::::較佳 = 合成樹脂與纖維素系粉末材料而開:適用= := 反的混合材料’並廉價地提供-種音響性能:： 且生產性良好之揚聲器用振動板。 4異 為了達成該目的，本發明之揚聲 係將非氣系合成樹脂、與粒度分佈為5:= 反的構造’ 維素系粉末的混合材料成型而構成。㈣至500^的纖 【貫施方式】 315938 6 200541373 (發明之實施形態） 為了二解:上述課題，本發明之揚聲器用振動板(以下， ==，將振動板之本體部份簡稱為振動板1)係 最好成樹脂、與粒度分佈為_至500㈣（希望 取好為l〇e m至400# m)之输組主/ 型而製造。非氣季入成价可^糸粉末的混合材料成 合成m匕φη 熱固性合成樹脂或熱塑性 '、曰壬-種’但-般係以例如聚烯烴系、聚苯乙 的合成樹脂做為非氯系合成樹脂，特別係 ^亥專之中’聚丙烯樹脂係從機械物性、易於加工、使用 二 &、杆紙片、紙漿粉末、棉絨粉、竹粉、洋麻、 頁麻、t料纖轉料的粉末。纖維素系粉末仙應 而施以表面處理’且其目的’係為了提高該等纖維素系的 纖維質材料表面與合成樹脂進行化學鍵結之親和力。纖維 素系叙末與合成樹脂的混合比例，係相對於混合材料 ”末構成為30重量％至7〇剛程度的比例為適 當:最好係構成^ 40重量％至6〇重量％為更佳。當纖維讀 素系粉末的混合比例過大時’會出現脆弱性而成為不適合 於該用途者。 ϋ 在纖維素系粉末因應所需而施行的表面處理係例如有 效的利用馬來酸酐等之多元酸酐將纖維素系粉末物質予以 酯化。藉由將該酯化纖維素系粉末物質與合成樹脂及微量 的苯醯過氧化物等的有機過氧化物予以混合之方式，使纖 維素系粉末與合成樹脂的親和力變大，並且不僅可使纖維 315938 7 200541373 •素系粉末的混合比例增加，在將兩材料混合時，即便混入 大量的纖維素系粉末，也不會因此降低流動性，且可使其 製造加易且亦有良好的成形性。另外，當纖維素系粉末與 合成樹脂的親和力變大時，不僅可得較大的混合比率，而 且例如混合的合成樹脂即使為聚烯烴系的合成樹脂，亦可 在製品的塗裝或構件的黏接之際’可藉由簡單的機械研磨 僅以表面處理直才妾塗裝或黏接。當然，若是施予與一般情 形相同的等離子體照射處理或底漆塗敷等的基底處理，又^ 必然更可使黏接力或塗裝膜的安定度變佳。 與纖維素系粉末混合的非氯系合成樹脂，可為献塑性 合成樹脂、亦可為熱固性合成樹脂。但是，從成型的難易、 材料的基本物性、材料的再利用性、棄材處理、材料價格 觀點’則以聚烯烴系合成樹脂’尤其以聚丙烯樹脂為 ^田。成型係以射出成型來進行，但當然亦可為壓出成型 者在該等的成型方法中，可使用泛用樹脂用的成型機。 $合材料的成型溫度係以⑽。c至細。c程度的範圍為適 :另外，例如使用檜木粉做為混合的纖維素系粉末，並 =由將成型溫度控制在前述程度的範圍，則可使製品的木 、持績。此時’亦可在使用的纖維素系粉末利用合成香料 進行香味的強調或調香者。 在以上所述本發明之揚聲器用振動板，係藉由混合纖 、，、素系粉末的表面處理作帛，增加對於合錢脂之分子的 :和力’因此’相對於合成樹脂可以以較大的比例進行混 °另外，纖維素系粉末的比例較大係表示振動板】的剛 315938 8 200541373 性較強，再者，如將振動板1分開振動時，隨著振動板1 的彎曲變形的形態，使得纖維素系粉末本身的tan 5 (機 械性的内部損失）與所混合之合成樹脂的tan $有效作用， 而择員不出整體較大的tan 5值。上述振動板丨的高楊氏模 i化、tan (5的增大，係在揚聲器進行振動時，不僅可令振 動板1的分開共振不易產生，並使頻率特性變佳，且降低 了起因於分開共振之振動板1的彎曲變形之非直線彎曲或 過渡彎曲的程度，並具有防止再生音質劣化的作用。 另外，藉由增大前述纖維素系粉末與合成樹脂之分子 的親#力可使混合材料之流動性在極為良好情況下，可 成型為厚度o.imm至0 5mm程度的振動板。以射出成型 做為成型方法時，由於亦可使用一般的汎用樹脂用的成型 機，因此，不僅不會在設備投資上造成多餘的費用，且由 於成型條件也與—般情形無異，所以在生產上並不會有任 何的困難。又’由於當混合比率較大時也可保持其流動性， 不A成生產能力的低下，再者，比較使用其他無機 二糸的填充材時，由於可令金屬模之汽缸或螺桿的磨耗較 > ’所以可降低設備的保固費用。200541373 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a structure of a vibrating plate for loudspeakers, which is a component having a function of transmitting sound waves in a loudspeaker. [Prior art] A conventional speaker is a mechanical inductive sensor that converts electrical signal energy into mechanical vibration energy and is driven and vibrated by the mechanical vibration energy output from the mechanical sensor to emit light. Acoustic energy (vibration plate) is composed of the conventional main components. In the figure i, when the structure of the vibration plate of the general speaker and the surrounding components are shown in the form of a model at the same time, a voice coil 3 is installed at the center of the vibration plate, and the vibration plate is used! A flexible edge 2 is provided on the outer periphery, or a baffle plate 4 which is also flexible through the center of the diaphragm 邛 is maintained inside each frame (not shown) to maintain free vibration. Then, more than three people in the voice coil are driven and vibrated in the magnetic field of a magnetic circuit (also omitted from the drawing) by the sound input = current to radiate sound waves. [Summary of the Invention] (Problems to be Solved by the Invention), ... 丨 Soil π 切 7 m cut off the outer periphery of j: 2: When the phase vibrates, although in the general audible frequency band, then two = rate The characteristic structure is flat, and good sound quality can be obtained. = The vibration plate itself is flexible, so when the drive is delayed relative to the central portion, the phase near the outer peripheral portion is delayed, and 2: :: 315315 5 200541373, rate 7 medium ~ 邛It vibrates in the reverse phase with the outer peripheral part, so that the emitted sound waves are mutually locked, and the frequency characteristic is inclined, or at a certain frequency, near the outer peripheral part or a specific part of the vibration plate surface Born by resonance = crest, which degrades the sound quality of the reproduced sound. In particular, as described above, the phenomenon of the resonance of the vibration plate 1 is generally caused by the distortion of higher-order spectral waves due to the asymmetric bow vibration of the vibration material. However, as described above, in the separation vibration, the shape of the vibration plate and the Intervention of material properties, especially = has been given to the degree and the Young's modulus and tan (5 (that is, the material's mechanical internal loss) and frequency mechanical value to give greater, 1: the degree of curvature constitutes a representative The direction of the object is clear as the ipa and the direction of the physical property value of the 5H is gradually becoming a material towel of 8M, although it meets the technical requirements, and the frequency characteristics of the 22nd reproduction sound quality are flattened. Therefore, When the plate is lifted: =, it is necessary to solve the so-called "it takes too much effort to promote the development of plate materials". The purpose of this article is to solve the above problems. The subject ’s position in the Vibration Materials Division focuses on synthetic resins with mouth 7 vibration, wood with excellent physical properties, etc. ::::: better = synthetic resin and cellulose powder materials: applicable =: = Inverse mixed material In addition, it provides inexpensive acoustic performance :: a vibrating plate for loudspeakers with good productivity. In order to achieve this, the speaker system of the present invention has a structure with a non-pneumatic synthetic resin and a particle size distribution of 5: = inverse 'A blend of vitamin-based powders is formed by molding. Fibers up to 500 ^ [perforation method] 315938 6 200541373 (an embodiment of the invention) In order to solve the above problem, the vibration plate for a speaker of the present invention (hereinafter, = =, The main part of the vibration plate is simply referred to as the vibration plate 1) It is best to be made of resin, and the master / type of particle size distribution is _ to 500 ㈣ (hope to take 10em to 400 # m). Non-seasonally priced, powder-mixed materials can be synthesized into synthetic m φη thermosetting synthetic resins or thermoplastics, '' Non-species '', but-generally, for example, polyolefin-based, polystyrene-based synthetic resins as non-chlorine It is a synthetic resin, especially in ^ Haizhuan 'polypropylene resin, which is from mechanical properties, easy to process, use two &, rod paper, pulp powder, cotton wool powder, bamboo powder, kenaf, sheet hemp, t-fiber Reconstituted powder. Cellulose-based powder The surface treatment 'and its purpose' is to improve the affinity of the chemical bonding between the surface of the cellulose-based cellulosic materials and the synthetic resin. The mixing ratio of the cellulose-based synthetic resin and the synthetic resin is relative to the "mixed material". A ratio of 30% by weight to 70% is appropriate: it is preferable that the composition be ^ 40% by weight to 60% by weight. When the mixing ratio of the fiber reading powder is too large, fragility occurs and it is not suitable. Those who use it. Ϋ The surface treatment system that is applied to the cellulose powder according to the needs, for example, effectively uses a polybasic acid anhydride such as maleic anhydride to esterify the cellulose powder material. By esterifying the cellulose powder The method of mixing substances with organic resins such as synthetic resins and trace amounts of phenylhydrazine peroxide makes the affinity of cellulose-based powders and synthetic resins larger, and not only fibers 315938 7 200541373 • mixing of plain powders The ratio increases. When mixing the two materials, even if a large amount of cellulose-based powder is mixed, the flowability will not be lowered, and the production can be facilitated. And also has good formability. In addition, when the affinity of the cellulose powder and the synthetic resin becomes large, not only a large mixing ratio can be obtained, but also, for example, the mixed synthetic resin can be used in the coating of products or components even if it is a polyolefin-based synthetic resin. At the time of bonding, it can be painted or bonded only by surface treatment by simple mechanical grinding. Of course, if a substrate treatment such as plasma irradiation treatment or primer coating is applied in the same manner as in the general case, the adhesion force or the stability of the coating film will be better. The non-chlorine-based synthetic resin mixed with the cellulose-based powder may be a synthetic plastic resin or a thermosetting synthetic resin. However, from the viewpoint of the ease of molding, the basic physical properties of the material, the recyclability of the material, the disposal of the scrap material, and the price of the material, 'Polyolefin-based synthetic resins', especially polypropylene resins, are used. The molding is performed by injection molding. Of course, it is also possible to use an extrusion molding method. Among such molding methods, a molding machine for general-purpose resin can be used. The molding temperature of the composite material is ⑽. c to fine. The range of the degree c is appropriate: In addition, for example, the use of alder powder as a mixed cellulose-based powder, and by controlling the molding temperature to the range described above, the wood and the product can be sustained. In this case, it is also possible to use a synthetic powder for the cellulose-based powder to emphasize or scent. In the above-mentioned loudspeaker vibration plate of the present invention, the surface treatment of the mixed fiber, plain, and plain powder is used to increase the molecular weight of the compound: Therefore, the force can be compared with synthetic resin. Larger proportions are mixed ° In addition, a larger proportion of cellulose-based powder indicates a vibration plate] The rigidity of 315938 8 200541373 is strong. Furthermore, when the vibration plate 1 is separated and vibrated, the vibration deformation of the vibration plate 1 is caused. The form of tan 5 makes the tan 5 (mechanical internal loss) of the cellulose powder itself and the tan $ of the synthetic resin mixed effectively, and the overall tan 5 value cannot be selected. The high Young's mode and the increase of tan (5) of the vibration plate mentioned above not only make the separation resonance of the vibration plate 1 difficult to occur when the speaker is vibrated, but also improves the frequency characteristics and reduces the cause. The degree of non-linear or transitional bending of the bending deformation of the resonance vibration plate 1 is separated, and it has the effect of preventing the degradation of the reproduction sound quality. In addition, by increasing the affinity between the cellulose powder and the molecules of the synthetic resin, When the fluidity of the mixed material is very good, it can be molded into a vibration plate with a thickness of about 0.5 mm to 0.5 mm. When injection molding is used as the molding method, a general molding machine for general resins can also be used. Not only will it not cause extra costs in equipment investment, and because the molding conditions are no different from the normal situation, there will not be any difficulties in production. Also, 'the flow can be maintained when the mixing ratio is large. In addition, the production capacity is not low, and when using other inorganic fillers, the wear of the cylinder or screw of the mold is lower than > Low equipment warranty costs.
吞火燼的產生較少，因此對於環 (實施例） 哥於本务明之振動板1，構成振動板本體部之混合材 ，且因使用非氣系合成樹脂，所以即 進行燃燒，另外，由於有害氣體或殘 因此對於環境污染的負擔較少。 實施例之揚聲器用振 第1圖的透視圖，係表示係第一 315938 9 200541373 ，動板的外觀。該第一實施例的振動板1之外形約為圓錐 形，且母線為曲線的錐形振動板。外周係以別的構件之邊 緣2( —般稱之為自由邊）保持在框架（無圖示）的内側^ 在中心部安裝音圈3,並藉由擋板4將與該音圈之安裝部 同樣保持在框架的内側。 第一貫施例之揚聲器用振動板丨的構成係以：丨）使用 聚丙烯樹脂做為非氯系合成樹脂；2 )纖維素系粉末的，係 使用平均粒度200/zm的木粉100重量份以馬來酸軒1〇重 量份將表面做酉旨化處理的木粉；3)使用苯酿過氧化物做為 有機過氧化物，並將前述聚丙烯樹脂49 5重量％、處理過 的木粉50重量％、及苯酿過氧化物G5重量％混合做成成 型用的混合材料；接著，4)將該混合材料以設定樹脂溫度 1贼予以成型，而製得第w所示第一實施例之揚聲器用 振動板1。第一實施例的尺寸為，直徑〇為1〇〇麵，外周 邊附近的厚度為20()Am，中心部附近的厚度同樣為2〇〇" ^’而中心部之音圈安裝孔的直徑d為2〇mm。另外，振動 ’板1的密度為l.l〇gr/c.c。 在*亥第-貫施例之振動板！的外周部上黏貼由薄發泡 尿烧樹脂片構成之邊緣2以試做揚聲器（口徑12cm)，並 測定輸出音壓強度及第二次 人°自波強度與弟三次諧波強度的 頻率特性。將結果示於第2 本波強度，特性⑴為第圖f该圖中’特性⑷為基 A笛- 4扯、ά & #為第—二人詣波強度，另外，特性（c) 為弟"一认δ白波強度。兔ΤΓ Ϊ 為了相互比較，在第3圖以形狀尺寸 大致相同的方式，分別本-丄a 刀別表不由使用在聚丙烯樹脂將雲母30 315938 10 200541373 %混入材料而構成的比較例振動板之試做揚聲器 壓強度及第二次諧波強度與第三次諧波強度的頻率特性Y 在"亥圖中特性（a)為基本波強度，特性（b )為第二借 波強度，此外，特性（c )為第三次諧波強度。 ❷ 亚分別以第4圖表示振動板材料之楊氏模量的溫度特 性，又以，第5圖表示tan占的溫度特性。在第4圖及第5 圖中，特性（a)為第一實施例之振動板材料的溫度特性圖， =性（b)曰為在本發明之振動板之混合材料中，將聚丙烯樹 月曰65重罝％與處理完成之木粉35重量％做成接近申請專春 利範圍之下限之混合率的模式混合所得之參考例振動板材 ^的溫度特性圖，特性（c)為由混入雲母35%之聚丙烯 樹脂所構成之比較例振動板材料的溫度特性圖。在考量實 際使用的參考例情況，各個溫度特性的測定範圍係在〇°c 至50°C之範圍。 根據比較第2圖及第3圖所示諸特性的結果，在所謂 賦予聽感影響最大之從50Hz到5KHz的頻率區域内，在各 揚聲器之音壓頻率特性雖無太大的差別，但第二次諧波強_ 度在波峰的頻率中（約60Hz)，第一實施例振動板係更低 於比較例約7dB。另外，第三次諧波強度也同樣在波峰的 頻率數（40Hz )約低3dB。如上所述，所謂的高次諧波的 強度較低’係指在聽到再生音時的混濁感較少之意，並可 得清澈良好的再生音樂。根據經由30人的收聽者之第一實 施例振動板與比較例振動板的試聽實驗結果，30人中有23 名認為第一實施例振動板較優質，而認為比較例較優質者 11 315938 200541373 ，有2名，認為同等級者有5名。第一實施例振動板之高次 諧波的強度比比較例振動板更低的理由，認為是否因為起 、因於振動板材料之物性值的差，而使得振動板本身之彎曲 振動的強度較低所致。另外，基於第4圖及第5圖之楊氏 模量及之溫度特性圖，第一實施例之揚聲器用振動 板之特徵係具有所謂··即使溫度變化，因其物性值的變化 較少’所以由於振動板的剛性及共振抑制作用，即使大氣 溫度變南或變低時的變動較小，因此，不會因季節使得再 #生音質有多大變化。 以上說明有關應為代表本發明之實施例，但本發明並 不僅限定在該等實施例構造者，具備本發明之前述構成要 件如· 4效的材質性材料的變換使用，包含金屬模之加熱 方法之成型方法的更改等，且達成所謂本發明之目的，在 具有所謂以下效果之範圍内，可適當的更改並實施者。 (發明效果） φ 以上所述本叙明之杨聲态用振動板，因藉由纖維素系 粉末的酯化表面處理的作用，增大對於合成樹脂分子的親 和力，因此可將纖維素系粉末以較大的比例進行混合，並 表示適合於振動板材料的密度、楊氏模量及較大的tan占。 以上所述諸物性值做成振動板所期望值之特徵係具有：將 該揚聲器用振動板使用於揚聲器並操作時，干預再生音質 車乂大的振動板之分開共振區域的峰值谷值（peakdip)的 凹凸較小，且可知由於頻率特性接***坦且歪曲程度也較 低所以係如比較視聽试驗的結果，可得優質音色的再生 315938 12 200541373 音。再者，由於振動板材料之楊氏模量及ta以的個別溫 度特性良好，所以對於環境溫度的變化其音色安定，並具 有所謂在任何季節再生音質皆不變動的效果。 另外，在製造領域中，藉由增大纖維素系粉末與合成 樹脂之分子的親和力，混合材料之流動性極佳的情況下， 即便以射出成型，或壓出成型，亦可使用泛用之樹脂用成 型機，因而不僅不需增加無謂的設備投資費用，且由於成 型條件也與一般不變，因此關於生產上並無任何困難。此 外，因即使混合比例較大也可維持流動性，所以不會降低籲 生產效率。再者，由於可使得金屬模或成型機之螺桿的磨 耗較少，所以設備的保固費用比起使用其他無機質系之填 充材的情形相較，具有可壓低成本之效果。 再者，關於本發明之製品，由於構成振動板的混合材 料係可再使用之非氯系合成樹脂，所以在廢棄之際，亦可 進行燃燒’又’由於有害氣體或殘留灰燼的產生較少，所 以也具有所謂對環境負擔較小的有用的效果。 【圖式簡單說明】 · 第1圖為第一實施例之揚聲器用振動板的透視圖。 第2圖為使用第一實施例之振動板的試做揚聲器之音 壓強度頻率特性圖及高次諧波強度頻率特性圖。 第3圖為使用變更振動板材料之比較例振動板的試做 揚聲杰之音壓強度頻率特性及高次諧波強度頻率特性圖。 第4圖係分別表示第一實施例、與比較例振動及參考 例振動板之振動板材料的楊氏模量之溫度變化的溫度特性 13 315938 200541373 圖。 第5圖係分別表示第一實施例、與比較例振動及參考 例振動板之振動板材料的tan (5之溫度變化的溫度特性 圖。 【主要元件符號說明】 1 振動板 2 邊緣 3 音圈 4 擋板 14 315938There is less generation of fire embers, so for the ring (example), the vibrating plate 1 of the present invention constitutes a mixed material of the vibrating plate main body, and uses a non-gas synthetic resin, so it is burned. In addition, because Harmful gases or residues therefore place less burden on environmental pollution. The vibration for the speaker of the embodiment. The perspective view of FIG. 1 shows the appearance of the moving plate according to the first 315938 9 200541373. The outer shape of the vibration plate 1 of the first embodiment is approximately a conical shape, and the generatrix is a curved conical vibration plate. The outer periphery is kept at the inner side of the frame (not shown) with the edge 2 (generally called the free edge) of other members. ^ A voice coil 3 is installed at the center, and the voice coil is installed with a baffle 4 The parts also remain inside the frame. The vibration plate for loudspeakers of the first embodiment is composed of: 丨) polypropylene resin is used as a non-chlorine synthetic resin; 2) cellulose powder is 100 weight wood powder with an average particle size of 200 / zm 10 parts by weight of maleic acid vinegar wood powder surface treatment; 3) Benzene peroxide as organic peroxide, and the aforementioned polypropylene resin 49 55% by weight, treated 50% by weight of wood flour and 5% by weight of benzene-peroxide G are mixed to form a mixed material for molding; then, 4) the mixed material is molded at a resin temperature of 1 to obtain the first as shown in w The speaker diaphragm 1 of the embodiment. The dimensions of the first embodiment are such that the diameter 0 is 100 planes, the thickness near the outer periphery is 20 (A), the thickness near the center is also 200, and the thickness of the voice coil mounting hole in the center is The diameter d is 20 mm. The density of the vibration plate 1 was 1.1 g / c.c. Vibration plate in * Hilti-Performance! An edge 2 made of a thin foamed urethane resin sheet was pasted on the outer peripheral part of the test speaker (diameter 12cm), and the frequency characteristics of the output sound pressure intensity and the second-degree self-wave intensity and the third-harmonic intensity were measured. . The results are shown in the intensity of the second local wave, and the characteristic 第 is shown in FIG. F. In the figure, the characteristic ⑷ is the base A flute-4 扯 、 ά &# 为 第 — 二人 诣 wave strength, and the characteristic (c) is Brother " recognizes δ white wave intensity. Rabbit TΓ 相互 For comparison with each other, in Figure 3, the shape and size are approximately the same, respectively. The Ben- 丄 a knife table shows a comparative example of a vibration plate composed of polypropylene resin mixed with mica 30 315938 10 200541373% into the material. The speaker's compressive strength, and the frequency characteristics of the second and third harmonic intensities are shown in the "Hai" graph. (A) is the fundamental wave intensity, and (b) is the second borrowed wave intensity. In addition, The characteristic (c) is the third harmonic intensity. Figure 4 shows the temperature characteristics of the Young's modulus of the vibration plate material in Figure 4, and Figure 5 shows the temperature characteristics in tan. In Figs. 4 and 5, characteristic (a) is a temperature characteristic diagram of the vibration plate material of the first embodiment, and (b) is the polypropylene material in the mixed material of the vibration plate of the present invention. The temperature characteristic diagram of the reference example vibrating plate ^ obtained by mixing 65% by weight and 35% by weight of the finished wood flour with a mixing rate close to the lower limit of the application range, and the characteristic (c) is mixed in Temperature characteristics of a comparative example vibration plate material made of 35% mica polypropylene resin. In consideration of the actual reference example, the measurement range of each temperature characteristic is in the range of 0 ° C to 50 ° C. According to the comparison of the characteristics shown in Figs. 2 and 3, in the frequency range from 50 Hz to 5 KHz which gives the greatest effect to the sense of hearing, although there is not much difference in the sound pressure frequency characteristics of each speaker, the first The intensity of the second harmonic is in the frequency of the peak (about 60 Hz). The vibration plate system of the first embodiment is even lower than the comparative example by about 7 dB. In addition, the intensity of the third harmonic is also about 3 dB lower at the frequency of the peak (40 Hz). As described above, the term "lower intensity of higher harmonics" means that there is less turbidity when a reproduced sound is heard, and clear and good reproduced music can be obtained. According to the test results of the first example vibration plate and the comparative example vibration plate of 30 listeners, 23 out of 30 people think that the first example vibration plate is better and the comparative example is better. 11 315938 200541373 There are 2 and 5 of the same level. The reason why the intensity of higher harmonics of the vibration plate of the first embodiment is lower than that of the vibration plate of the comparative example is that it is considered that the strength of the bending vibration of the vibration plate itself is relatively low because of the difference in the physical properties of the material of the vibration plate. Low. In addition, based on the Young's modulus and temperature characteristic diagrams of Figs. 4 and 5, the characteristics of the vibration plate for a loudspeaker of the first embodiment are so-called ... even if the temperature changes, there is less change in the physical property value ' Therefore, due to the rigidity and resonance suppression effect of the vibration plate, even when the atmospheric temperature becomes south or lower, the fluctuation is small, so there will not be much change in the quality of the regenerating sound due to the season. The above description is about the embodiments that represent the present invention, but the present invention is not limited to those who construct the embodiments, and the conversion and use of material materials with the aforementioned constituent elements of the present invention, such as · 4 effects, including the heating of metal molds Modification of the molding method of the method, etc., and achieving the object of the present invention can be appropriately modified and implemented within a range having the following effects. (Effects of the Invention) φ As described above, the acoustic vibration plate for Yang of the present description has an increased affinity for synthetic resin molecules due to the esterification surface treatment of cellulose-based powders. Larger proportions are mixed and indicate the density, Young's modulus, and larger tan ratio suitable for the vibration plate material. The characteristic that the above-mentioned physical property values are the desired values of the vibration plate is that when the speaker vibration plate is used and operated, the peak and valley values (peakdip) of the separation resonance region of the large vibration plate of the regenerative sound quality vehicle are intervened. The unevenness is small, and it can be seen that the frequency characteristics are nearly flat and the distortion is low, so if you compare the results of the audio-visual test, you can get a high-quality tone reproduction 315938 12 200541373 sound. In addition, since the Young's modulus and individual temperature characteristics of ta are good for the vibration plate material, the sound color is stable against changes in ambient temperature, and it has the effect that the reproduced sound quality does not change in any season. In addition, in the manufacturing field, by increasing the affinity of the cellulose-based powder and the molecules of the synthetic resin, the fluidity of the mixed material is very good. Even if it is injection molding or extrusion molding, it can also be used widely. The molding machine for resin does not need to increase the unnecessary investment cost of equipment, and the molding conditions are the same, so there is no difficulty in production. In addition, since the fluidity can be maintained even with a large mixing ratio, the production efficiency is not reduced. In addition, since the wear of the mold or the screw of the molding machine can be reduced, the warranty cost of the equipment has the effect of reducing the cost compared to the case of using other inorganic filling materials. In addition, the product of the present invention is a non-chlorine-based synthetic resin that can be reused as the mixed material constituting the vibration plate. Therefore, it can also be burned when discarded, because less harmful gas or residual ash is generated. Therefore, it also has a useful effect of so-called small environmental burden. [Brief Description of the Drawings] · Fig. 1 is a perspective view of a speaker vibration plate of the first embodiment. Fig. 2 is a graph of sound pressure intensity frequency characteristics and harmonic intensity frequency characteristics of a prototype speaker using the vibration plate of the first embodiment. Fig. 3 is a test example of a comparative example using a changed vibration plate material. The sound pressure intensity frequency characteristics and the harmonic intensity frequency characteristics of Yang Shengjie. Fig. 4 is a graph showing the temperature characteristics of the Young's modulus of the vibration plate materials of the first embodiment, the vibration plate of the comparative example, and the vibration plate of the comparative example, and the temperature characteristics. Fig. 5 is a temperature characteristic diagram showing the temperature change of the tan (5) of the vibration plate material of the vibration plate of the first embodiment and the vibration of the comparative example and the reference example. [Explanation of Symbols of Main Components] 1 Vibration plate 2 Edge 3 Voice coil 4 bezel 14 315938