JPH0738751B2 - Material for speaker box - Google Patents
Material for speaker boxInfo
- Publication number
- JPH0738751B2 JPH0738751B2 JP63319037A JP31903788A JPH0738751B2 JP H0738751 B2 JPH0738751 B2 JP H0738751B2 JP 63319037 A JP63319037 A JP 63319037A JP 31903788 A JP31903788 A JP 31903788A JP H0738751 B2 JPH0738751 B2 JP H0738751B2
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- whiskers
- box
- speaker box
- materials
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 title claims description 27
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
- 229920003002 synthetic resin Polymers 0.000 claims description 10
- 239000000057 synthetic resin Substances 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 229920001169 thermoplastic Polymers 0.000 claims description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims description 6
- 239000004416 thermosoftening plastic Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- 235000018185 Betula X alpestris Nutrition 0.000 description 1
- 235000018212 Betula X uliginosa Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- -1 Polypropylene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229960001124 trientine Drugs 0.000 description 1
Landscapes
- Details Of Audible-Bandwidth Transducers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は音響出力機器等に用いるスピーカを収納するス
ピーカボックス用の材料に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for a speaker box that houses a speaker used in an audio output device or the like.
従来の技術 近年、テレビ、ステレオ、ラジカセ等の音響出力機器に
おいては、スピーカおよびスピーカシステムの音響特性
に対しては、従来よりもさらに優れた出力音圧、歪率、
平坦性が望まれており、またスピーカおよびスピーカシ
ステムの省スペース化も同時に求められており、音響特
性を左右する、スピーカおよびスピーカシステムを収納
するスピーカボックスはますます重要視されている。2. Description of the Related Art In recent years, in acoustic output devices such as televisions, stereos, and radio-cassettes, with respect to the acoustic characteristics of speakers and speaker systems, output sound pressure, distortion rate, and
The flatness is desired, and the space saving of the speaker and the speaker system is also demanded at the same time, and the speaker and the speaker box that houses the speaker system, which influences the acoustic characteristics, are becoming more and more important.
従来スピーカ用およびスピーカシステム用ボックス材料
（以下スピーカ用ボックス材料）として、ラワ、ブナ、
松、シラカバなどを原料木材とした合板や木材その他の
植物繊維質の小片に合成樹脂接着剤を塗布し、人工的に
成板したパーチクルボードが用いられてきた。しかしな
がら、これらの材料を用いると、ボックスを構成する際
にその組立工程が複雑で工数も多く、製造効率が低いと
いう欠点を持ち、近年この問題点を解決する目的で熱可
塑性の合成樹脂を材料とし、これを射出成形等の方法で
ボックス形状に成形し用いることが多くなってきてい
る。Conventional speaker and speaker system box materials (hereinafter referred to as speaker box materials) are
An artificial particle board has been used in which a synthetic resin adhesive is applied to a plywood made from pine, birch, etc. as a raw material wood, or wood or other plant fiber pieces. However, when these materials are used, they have the drawbacks that the assembly process is complicated when constructing the box, the number of steps is large, and the manufacturing efficiency is low. In recent years, thermoplastic synthetic resins have been used for the purpose of solving this problem. In many cases, this is molded and used in a box shape by a method such as injection molding.
発明が解決しようとする課題 しかしながら、これらの材料を用いたボックスは素材の
曲げ弾性率が小さく、スピーカを一定のパワーで駆動し
たときボックスが変形し、異常音が発生したり、スピー
カと共振し、スピーカの音圧−周波数特性において山谷
が生じたり、歪率が増加するといった悪影響があった。However, the box using these materials has a small bending elastic modulus of the material, and when the speaker is driven with a constant power, the box is deformed to generate an abnormal sound or resonate with the speaker. The sound pressure-frequency characteristics of the speaker had adverse effects such as peaks and valleys and increased distortion.
本発明は上記問題点に鑑み、スピーカの駆動中にボック
スが変形せず、異常音を発生せず、優れた音響特性を有
するスピーカシステムを実現し、従来の合成樹脂材料と
同様に成形が可能なスピーカボックス用材料を提供する
ものである。In view of the above problems, the present invention realizes a speaker system that does not deform the box while driving the speaker, does not generate abnormal sound, and has excellent acoustic characteristics, and can be molded in the same manner as conventional synthetic resin materials. The present invention provides a material for a speaker box.
課題を解決するための手段 この目的を達成するために、本発明のスピーカボックス
用材料は、熱可塑性、あるいは熱硬化性の合成樹脂と、
中心から異なる４方向へ結晶が成長した酸化亜鉛よりな
る弾性率の高いウィスカーを混合した素材をスピーカボ
ックス用材料として用いたものである。Means for Solving the Problems In order to achieve this object, a speaker box material of the present invention is a thermoplastic or thermosetting synthetic resin,
A material in which whiskers having a high elastic modulus made of zinc oxide having crystals grown in four different directions from the center are mixed is used as a material for a speaker box.
作用 本発明は、上記した構成により、非常に弾性率が大き
く、これを用いて成形した成形板は、従来の樹脂成形板
と比較した場合、厚み一定の条件では、非常に曲げ剛性
が増大するものであり、この結果、これを用いて成形し
たスピーカボックスは、スピーカの動作中に変形したり
共振を生じないため、スピーカの音圧−周波数特性が平
坦になり、かつ歪が低減する効果を有するものである。
また、熱可塑性、あるいは熱硬化性の合成樹脂を基材と
し、これに上述の中心から異なる４方向へ結晶が成長し
た酸化亜鉛よりなる弾性率の大きいウィスカーを混合し
た素材を用いているため熱可塑性、あるいは熱硬化性の
合成樹脂とウィスカーとの絡み合いが良好で従来の針状
ウィスカーと比べて弾性率を大きくすることができる。Effect The present invention has a very large elastic modulus due to the above-mentioned configuration, and a molded plate molded using this has a significantly increased flexural rigidity under the condition of a constant thickness as compared with a conventional resin molded plate. As a result, since the speaker box molded using this does not deform or resonate during operation of the speaker, the sound pressure-frequency characteristics of the speaker become flat, and distortion is reduced. I have.
In addition, since a thermoplastic or thermosetting synthetic resin is used as a base material and a whisker with a large elastic modulus made of zinc oxide in which crystals grow in four different directions from the above center is mixed, the material is The entanglement between the plastic or thermosetting synthetic resin and the whiskers is good, and the elastic modulus can be increased as compared with the conventional needle-shaped whiskers.
また、このスピーカボックス用材料は、熱可塑性、ある
いは熱硬化性の合成樹脂に中心から異なる４方向へ結晶
が成長した酸化亜鉛よりなる弾性率の大きいウィスカー
を混合した素材を用いているため射出成形法等の方法で
成形した場合、従来の針状のウィスカーのように、成形
時の樹脂の流れによってウィスカーが配向し、材料の強
度に方向性が現われて一定方向の強度が極端に弱くなる
ような現象が起こらず、あらゆる方向に対して均等に優
れた材料強度を示す。In addition, this speaker box material is injection-molded because it is made of a thermoplastic or thermosetting synthetic resin mixed with whiskers with a large elastic modulus made of zinc oxide with crystals grown in four different directions from the center. When molded by a method such as the method, like conventional needle-shaped whiskers, the whiskers are oriented by the flow of resin during molding, and the directionality appears in the strength of the material and the strength in a certain direction becomes extremely weak. This phenomenon does not occur and shows excellent material strength in all directions.
さらに、このスピーカボックス用材料は、合成樹脂とウ
ィスカーのなじみがよいため、従来の各種補強材料を添
加した成形材料以上に良好な成形性を示し、複雑な形状
も成形可能と同時に非常に量産性に優れている。Furthermore, because this speaker box material has good compatibility with synthetic resins and whiskers, it exhibits better moldability than conventional molding materials containing various reinforcing materials, and it is possible to mold complex shapes and at the same time very mass producible. Is excellent.
実施例 以下、本発明の一実施例について図面を用いて説明す
る。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
（実施例１） ウィスカーは酸化亜鉛ウィスカー（分子式……ZnO）
で、中心から異なる４方向へ結晶が成長したいわゆるテ
トラポット形状で、結晶サイズは約100μｍである。マ
トリックス樹脂としてエポキシ樹脂を用い、ピリアミン
系硬化剤により硬化した。エポキシ樹脂はエピコート82
8を用い、硬化剤としてトチエチレンテトラミンを用い
た。ウィスカーの含有率は０〜70wt％としエピコート82
8と十分に混練したのちトリエチレンテトラミンをエピ
コート828,100重量部に対して12重量部の割合で加え、
十分に混練したのち、注型法により所定の形状で成形し
て試料を作成した。(Example 1) Whiskers are zinc oxide whiskers (molecular formula ... ZnO)
The crystal size is about 100 μm in a so-called tetrapot shape in which crystals grow in four different directions from the center. Epoxy resin was used as the matrix resin and cured with a pyriamine-based curing agent. Epoxy resin is Epicoat 82
8 was used, and totiethylenetetramine was used as a curing agent. Whiskers content is 0-70wt% and Epicoat 82
After thoroughly kneading with 8, triethylene tetramine was added at a ratio of 12 parts by weight to Epicoat 828,100 parts by weight,
After sufficiently kneading, a sample was prepared by molding in a predetermined shape by a casting method.
第１図にウィスカーの含有率と作成した試料の曲げ弾性
率との関係を示す。FIG. 1 shows the relationship between the whisker content and the flexural modulus of the prepared sample.
（実施例２） ウィスカーは、実施例１と同じ酸化亜鉛ウィスカーを用
いた。結晶サイズも同一である。マトリックス樹脂とし
て、ポリプロピレンを用いた。ウィスカーの含有率は０
〜70wt％とし、プリコンパウンド方式で、あらかじめ樹
脂とウィスカーを混練してペレットを成形したのち、射
出成形により所定の形状に成形して試料を作成した。(Example 2) As the whiskers, the same zinc oxide whiskers as in Example 1 were used. The crystal size is also the same. Polypropylene was used as the matrix resin. Whisker content is 0
The resin was mixed with whiskers in advance by a pre-compound method to form pellets, which were then molded into a predetermined shape by injection molding to prepare a sample.
第２図にウィスカーの含有率と作成した試料の曲げ弾性
率との関係を示す。FIG. 2 shows the relationship between the whisker content and the flexural modulus of the prepared sample.
第１図，第２図からも明らかなように、実施例１、実施
例２ともにウィスカーの含有率が増大するにつれて素材
の曲げ弾性率が増大している。曲げ弾性率はボックス材
料としての評価を示す重要な物性値であり、この値が小
さいとボックスに異常音が発生したり、スピーカの音圧
−周波数特性において山谷が生じたり、歪率が増大す
る。As is clear from FIGS. 1 and 2, the flexural modulus of the material increases in both Example 1 and Example 2 as the content of whiskers increases. The flexural modulus is an important physical property value indicating the evaluation as a box material, and if this value is small, abnormal sound will occur in the box, peaks and valleys will occur in the sound pressure-frequency characteristics of the speaker, and the distortion rate will increase. .
従来のボックス材料との比較、ウィスカー含有の効果の
比較として実施例１、実施例２における素材物性の値を
第１表に示す。Table 1 shows the values of the physical properties of the raw materials in Example 1 and Example 2 as a comparison with the conventional box material and a comparison of the effect of containing whiskers.
第２表には実施例１よりなる素材のうち、ウィスカー30
wt％の複合素材を用いて肉厚３mmt内容積約6lのスピー
カボックスを作成し、このスピーカボックスのバッフル
面に10cm口径のスピーカを取付け、このスピーカを各入
力（８Ωインピーダンス）で駆動した場合のバッフル面
の中央での加速度を示す。このように、実施例２よりな
るボックスはウィスカーが含有されると加速度が小さ
く、あまり振動していないためボックス材料として最適
な材料である。 Table 2 shows the whiskers 30 of the materials of Example 1.
When a speaker box with a wall thickness of 3 mm t and an internal volume of about 6 l is made using wt% composite material, a speaker with a 10 cm diameter is attached to the baffle surface of this speaker box, and this speaker is driven by each input (8Ω impedance) The acceleration at the center of the baffle surface of is shown. As described above, the box according to the second embodiment has the small acceleration when the whiskers are contained therein, and does not vibrate so much.
発明の効果 以上のように本発明は、熱可塑性、あるいは熱硬化性の
合成樹脂と、中心から異なる４方向へ結晶が成長した酸
化亜鉛よりなるウィスカーを混合した素材をスピーカボ
ックス用材料として用いたもので、本発明による材料に
よれば、曲げ弾性率が大きいため、異常音が発生せず、
さらにスピーカの音圧−周波数特性が平坦になり、歪率
が低減するスピーカボックスを実現できるものである。 EFFECTS OF THE INVENTION As described above, according to the present invention, a material in which a thermoplastic or thermosetting synthetic resin and a whisker made of zinc oxide having crystals grown in four different directions from the center are mixed is used as a speaker box material. According to the material of the present invention, since the bending elastic modulus is large, abnormal noise does not occur,
Further, it is possible to realize a speaker box in which the sound pressure-frequency characteristic of the speaker becomes flat and the distortion rate is reduced.
第１図，第２図はそれぞれ本発明のスピーカ用ボックス
に使用する素材のウィスカーの添加料と曲げ弾性率の関
係を示すグラフである。FIG. 1 and FIG. 2 are graphs showing the relationship between the additive and the flexural modulus of whiskers, which are the materials used for the speaker box of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 朝倉 栄三 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 北野 基 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (56)参考文献 特開 平１−220598（ＪＰ，Ａ) 特開 昭50−6597（ＪＰ，Ａ) 特公 昭63−5959（ＪＰ，Ｂ２) 特公 昭63−56760（ＪＰ，Ｂ２) 特公 昭63−56759（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eizo Asakura 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Moto Ki Kitano, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 56) References JP-A 1-220598 (JP, A) JP-A 50-6597 (JP, A) JP-B 63-5959 (JP, B2) JP-B 63-56760 (JP, B2) JP-B Sho 63-56759 (JP, B2)
Claims (1)
と、中心から異なる４方向へ結晶が成長した酸化亜鉛よ
りなるウィスカーを混合してなるスピーカボックス用材
料。1. A speaker box material obtained by mixing a thermoplastic or thermosetting synthetic resin and a whisker made of zinc oxide having crystals grown in four different directions from the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63319037A JPH0738751B2 (en) | 1988-12-16 | 1988-12-16 | Material for speaker box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63319037A JPH0738751B2 (en) | 1988-12-16 | 1988-12-16 | Material for speaker box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02162998A JPH02162998A (en) | 1990-06-22 |
| JPH0738751B2 true JPH0738751B2 (en) | 1995-04-26 |
Family
ID=18105811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63319037A Expired - Lifetime JPH0738751B2 (en) | 1988-12-16 | 1988-12-16 | Material for speaker box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0738751B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6356759B2 (en) | 2016-10-12 | 2018-07-11 | 本田技研工業株式会社 | Aging method of electrolyte membrane / electrode structure |
| JP6356760B2 (en) | 2016-10-14 | 2018-07-11 | 株式会社ファインウェル | Listening device |
-
1988
- 1988-12-16 JP JP63319037A patent/JPH0738751B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6356759B2 (en) | 2016-10-12 | 2018-07-11 | 本田技研工業株式会社 | Aging method of electrolyte membrane / electrode structure |
| JP6356760B2 (en) | 2016-10-14 | 2018-07-11 | 株式会社ファインウェル | Listening device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02162998A (en) | 1990-06-22 |
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