JPH0410796B2 - - Google Patents
Info
- Publication number
- JPH0410796B2 JPH0410796B2 JP57015057A JP1505782A JPH0410796B2 JP H0410796 B2 JPH0410796 B2 JP H0410796B2 JP 57015057 A JP57015057 A JP 57015057A JP 1505782 A JP1505782 A JP 1505782A JP H0410796 B2 JPH0410796 B2 JP H0410796B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- diaphragm
- present
- dome
- range
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
【発明の詳細な説明】
本発明はスピーカー用振動板に係り、特にはツ
イターまたはスコーカーに使用するドーム形スピ
ーカー用振動板に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diaphragm for a speaker, and particularly to a diaphragm for a dome-shaped speaker used in a tweeter or a squawker.
一般に高忠実度のスピーカーに使用する振動板
の諸特性として、その材質が比較的高弾性である
こと、適当な内部損失を有していること、軽量で
あること等が必要とされている。 In general, the characteristics of a diaphragm used in high-fidelity speakers include that the material should have relatively high elasticity, have an appropriate internal loss, and be lightweight.
しかして上記の如きスピーカーに於いて従来か
ら使用ないし提案されているものとして、まづ布
材に例えばラテツクスの如きゴム系樹脂を含浸さ
せたもの、ポリエステル系のフイルム又はアルミ
ニウムチタニウムの如き金属材料等がある。 However, the materials that have been used or proposed in the above-mentioned speakers include cloth materials impregnated with rubber resin such as latex, polyester films, and metal materials such as aluminum titanium. There is.
しかしながら布材に樹脂を含浸させたものは、
一般に高域再生の限界の周波数（以下高域限界周
波数という）が低く、しかも前記したように樹脂
を含浸させてあるので、比重が大となり、従つて
変換効率が低下する傾向を有している。 However, cloth materials impregnated with resin,
In general, the limit frequency for high-frequency reproduction (hereinafter referred to as high-frequency limit frequency) is low, and since it is impregnated with resin as described above, the specific gravity tends to be large and the conversion efficiency tends to decrease. .
上記諸欠点を除去しうるものとして、ポリエス
テル系のフイルムからなる振動板があり、これは
高域限界周波数は一般的には上記材よりも高く、
しかも比重も小さいものであるが、この材料の欠
点はピーク・デツプが特に高音域において顕著に
あらわれるという欠点を有しているため、忠実な
再生音を得がたいという欠点を有している。 There is a diaphragm made of polyester film that can eliminate the above-mentioned drawbacks, and this has a high limit frequency that is generally higher than that of the above-mentioned materials.
Moreover, although it has a small specific gravity, the disadvantage of this material is that the peak depth is particularly noticeable in the high frequency range, making it difficult to obtain faithful reproduced sound.
また近年提案されている金属材は高域限界周波
数はポリエステル系フイルムの場合よりも大では
あるが、反面低域限界周波数が高く（すなわち低
温が出にくい）、しかも前記したピーク・デツプ
が高音域において最も顕著にあらわれるという別
異の欠点を併有しているものである。 In addition, metal materials that have been proposed in recent years have a higher limit frequency in the high range than that of polyester films, but on the other hand, they have a higher limit frequency in the low range (that is, they are less likely to generate low temperatures), and the peak depth described above is higher in the high range. It also has the distinct disadvantage that it appears most prominently in .
一方加工上の問題点としては、上記金属材はそ
の性質上加工性に乏しく、一方ポリエステル系樹
脂は成形後において変形を生じやすい欠点を有し
ている。また布材に樹脂を含浸させた材料は成形
後スピーカーにこれを取り付けたのち、さらにそ
の上に樹脂を塗布するという余分な工程が必要と
なる。 On the other hand, as for problems in processing, the above-mentioned metal materials have poor processability due to their nature, while polyester resins have the disadvantage of being easily deformed after molding. In addition, a cloth material impregnated with resin requires an extra step of applying resin on top of it after molding and attaching it to the speaker.
本発明はかゝる事情に鑑みてなされたもので、
上記材料の諸欠点を除去した新規なドーム型スピ
ーカー用振動板を提供することを目的としてい
る。 The present invention was made in view of the above circumstances, and
The object of the present invention is to provide a new diaphragm for a dome-shaped speaker that eliminates the drawbacks of the above-mentioned materials.
以下本発明に係るドーム型スピーカー用振動板
（以下本発明品という）について説明する。 The diaphragm for a dome-shaped speaker according to the present invention (hereinafter referred to as the product of the present invention) will be described below.
本発明品は独立気泡を有する架橋ポリプロピレ
ンフオームからなる材料を使用していわゆるドー
ムの形状に成形した振動板である。そしてその比
重は0.03〜0.05の範囲とする。しかして上記架橋
ポリプロピレンフオームは例えば東レ製のトーレ
ペフPP（登録商標）を使用することができる。 The product of the present invention is a diaphragm formed into a so-called dome shape using a material made of a crosslinked polypropylene foam having closed cells. And its specific gravity is in the range of 0.03 to 0.05. As the crosslinked polypropylene foam, for example, Toraypef PP (registered trademark) manufactured by Toray Industries can be used.
本発明品は内部に独立気泡を有しているため甚
だ軽量（比重0.05以下）であつて従つて変換効率
が大になる他、上記架橋効果のため適度の剛性を
有している（ヤング係数は4.30〜14.80Kg／cm2で
ある）ため、高音域において後述するようにピー
ク・デイツプの発生が殆んど完全に防止される。 Since the product of the present invention has closed cells inside, it is extremely lightweight (specific gravity 0.05 or less) and has a high conversion efficiency. In addition, due to the above-mentioned crosslinking effect, it has appropriate rigidity (Young's modulus (4.30 to 14.80 Kg/cm 2 ), the occurrence of peak dips is almost completely prevented in the high frequency range, as will be described later.
また加工性については、布材の如く樹脂の塗布
が必要でなく、ポリエステル系樹脂の如き成形後
における形状の変形が発生するおそれはない。ま
た金属材にみられる加工の困難性は見られないも
のであり、そのため大変に均一な成形状態におい
て、容易に加工することができるという効果を有
している。 Regarding processability, it does not require resin coating unlike cloth materials, and there is no risk of shape deformation after molding as with polyester resins. Furthermore, it does not have the difficulty of processing that occurs with metal materials, and therefore has the advantage that it can be easily processed in a very uniform molded state.
さらにスピーカー用振動板として要請されてい
る耐水性、耐熱温度、耐寒性、吸水性等いわゆる
耐候性に関連する性質についても適度な値を示し
ているものである。 Furthermore, it also exhibits appropriate values for properties related to so-called weather resistance, such as water resistance, heat resistance, cold resistance, and water absorption, which are required for speaker diaphragms.
すなわち耐熱温度、耐寒温度はそれぞれ120℃、
−20℃であり、吸水率についてはJISK6767所定
の測定方法でもつて上記トーレペフPPについて
９cm／minの値を有しており、スピーカー用振動
板として好適である。 In other words, the heat-resistant temperature and cold-resistant temperature are 120℃, respectively.
-20°C, and the water absorption rate of the above-mentioned Torepef PP is 9 cm/min according to the JIS K6767 prescribed measurement method, making it suitable as a diaphragm for speakers.
しかして上記材料をドーム形状に加工し、これ
でもつてツイータとして作成したスピーカの周波
数特性は第１図に示される。 FIG. 1 shows the frequency characteristics of a speaker manufactured by processing the above-mentioned material into a dome shape and using this material as a tweeter.
同図においては前記した通り周波数特性は1500
Hz〜30000Hzの範囲において略フラツトであると
ともに、高音域においてピーク・デツプはあらわ
れることがなく、高域限界周波数も布材に比べて
高くなつていることが判る。 In the same figure, as mentioned above, the frequency characteristic is 1500.
It can be seen that it is approximately flat in the range from Hz to 30,000 Hz, and that no peak or depth appears in the high frequency range, and that the high frequency limit frequency is also higher than that of the cloth material.
第２図内至第４図は順に布材、ポリエステル系
樹脂、金属材を使用したスピーカーの周波数特性
であるが、布材を用いたものは高音域においてピ
ーク・デツプが顕著にあらわれている他に高域限
界周波数が低くなつており、また全体として出力
音圧レベルも本発明品の場合にくらべ低い。 Figures 2 to 4 show the frequency characteristics of speakers made of fabric, polyester resin, and metal, in order.The speakers made of fabric have a noticeable peak and depth in the high frequency range. The upper limit frequency is lower, and the output sound pressure level as a whole is lower than that of the product of the present invention.
またポリエステル系材料の場合、金属（第４図
はチタン系金属）の場合においても上記よりさら
に大きいピーク・デツプの発生が見られ、特に金
属材の場合は甚だしく大である。 Further, in the case of polyester-based materials, even in the case of metals (titanium-based metals in FIG. 4), even larger peaks and depths than those described above are observed, and in the case of metal materials, the peaks and depths are particularly large.
以上はツイータの場合における周波数特性であ
るが、本発明によるドーム型スコーカを作成した
場合にも、全体として周波数特性は左より（低温
側）になる他は前記ツイータの場合と類似した結
果をしめしていることが確められた。 The above is the frequency characteristic in the case of a tweeter, but even when a dome-shaped squawker according to the present invention is created, results similar to those in the case of the tweeter described above are shown, except that the overall frequency characteristic becomes closer to the left (lower temperature side). It was confirmed that
また本発明品を用いたスピーカーは迫力、柔か
さ、明るさ、繊細さに富みバランスのよい音質が
得られている。 In addition, speakers using the product of the present invention have a well-balanced sound quality that is rich in power, softness, brightness, and delicacy.
第１図は本発明品、第２図は布材、第３図はポ
リエステル系樹脂、第４図はチタン系金属材をそ
れぞれ使用した場合のドーム型ツイータの周波数
特性をそれぞれしめす図面である。
FIG. 1 is a drawing showing the frequency characteristics of a dome-shaped tweeter using a product of the present invention, FIG. 2 using a cloth material, FIG. 3 using a polyester resin, and FIG. 4 using a titanium-based metal material.
Claims (1)
スピーカ用振動板において、独立気泡を有する架
橋ポリプロピレンフオームからなるものであり、
前記架橋ポリプロピレンフオームの比重は0.03〜
0.05であり、かつヤング率は4.30〜14.80Kg／cm3の
範囲であることを特徴とするスピーカ用振動板。1. A diaphragm for a dome-shaped speaker used in a tweeter or squawker, which is made of a cross-linked polypropylene foam having closed cells,
The specific gravity of the crosslinked polypropylene foam is 0.03~
0.05 and a Young's modulus in the range of 4.30 to 14.80 Kg/cm 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1505782A JPS58131896A (en) | 1982-02-01 | 1982-02-01 | Diaphragm for loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1505782A JPS58131896A (en) | 1982-02-01 | 1982-02-01 | Diaphragm for loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58131896A JPS58131896A (en) | 1983-08-05 |
| JPH0410796B2 true JPH0410796B2 (en) | 1992-02-26 |
Family
ID=11878205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1505782A Granted JPS58131896A (en) | 1982-02-01 | 1982-02-01 | Diaphragm for loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58131896A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9438997B2 (en) | 2012-12-14 | 2016-09-06 | Panasonic Intellectual Property Management Co., Ltd. | Diaphragm, loudspeaker using diaphragm, electronic device and mobile device using loudspeaker, and method for producing diaphragm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS598937B2 (en) * | 1978-08-09 | 1984-02-28 | 株式会社日立製作所 | Illuminance control method in color cathode ray tube exposure equipment |
-
1982
- 1982-02-01 JP JP1505782A patent/JPS58131896A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58131896A (en) | 1983-08-05 |
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