JPS5810039B2 - Vibration plate for headphones - Google Patents
Vibration plate for headphonesInfo
- Publication number
- JPS5810039B2 JPS5810039B2 JP1060976A JP1060976A JPS5810039B2 JP S5810039 B2 JPS5810039 B2 JP S5810039B2 JP 1060976 A JP1060976 A JP 1060976A JP 1060976 A JP1060976 A JP 1060976A JP S5810039 B2 JPS5810039 B2 JP S5810039B2
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- diaphragm
- headphones
- dome
- film
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/127—Non-planar diaphragms or cones dome-shaped
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、ヘッドホンに用いる振動板に関し、軽量にし
てステイフネスが小さく、かつヤング率の大きなヘッド
ホン用振動板を提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diaphragm for use in headphones, and provides a diaphragm for headphones that is lightweight, has low stiffness, and has a large Young's modulus.
従来よりヘッドホンには、（Ａ）ダイナミック型、（Ｂ
）静電型、（Ｏ）圧電型のものがあり、（Ａ）のダイナ
ミック型ではローン紙またはプラスチックフィルムが、
（Ｂ）の静電型ではプラスチックフィルムが、（Ｃ）の
圧電型では高分子圧電薄膜が振動板として用いられてい
る。Traditionally, there are two types of headphones: (A) dynamic type, (B)
) electrostatic type, (O) piezoelectric type, and (A) dynamic type uses loan paper or plastic film.
In the electrostatic type (B), a plastic film is used as the diaphragm, and in the piezoelectric type (C), a polymer piezoelectric thin film is used as the diaphragm.
本発明は上記（５）のダイナミック型ヘッドホン用の振
動板に関するものである。The present invention relates to the above (5) diaphragm for dynamic headphones.
ヘッドホン用振動板において、小型でしかも広帯域の周
波数を再生する必要があり、また軽量にするため高能率
の振動板が要求される。A diaphragm for headphones needs to be small and reproduce a wide band of frequencies, and also requires a highly efficient diaphragm to be lightweight.
ドーム状振動板をこのような目的に使用する場合、低域
周波数特性を向上するためにはエツジのステイフネスを
小さくするか、振動系の質量を大きくしなければならず
、一方高域特性を拡大するためには比弾性率を大きくす
ることが必要である。When using a dome-shaped diaphragm for such purposes, it is necessary to reduce the edge stiffness or increase the mass of the vibration system in order to improve the low frequency response, while at the same time increasing the high frequency response. In order to achieve this, it is necessary to increase the specific modulus of elasticity.
本発明はこのような相反する要求を満足させることがで
きるヘッドホン用振動板を提供するものである。The present invention provides a headphone diaphragm that can satisfy these contradictory demands.
本発明は上記のように広帯域再生可能な超小型軽量のヘ
ッドホン用振動板を提供するものであり、軟質高分子薄
膜を金型を用いて成形を行ない、ドーム部とエツジ部を
同時に形成し、更にドーム部に硬質薄膜ドーム成形物を
液状物質により密着接合することを特徴とするものであ
る。The present invention provides an ultra-compact and lightweight headphone diaphragm capable of broadband reproduction as described above, in which a soft polymer thin film is molded using a mold to form a dome portion and an edge portion at the same time. Furthermore, it is characterized in that a hard thin film dome molded product is tightly bonded to the dome portion using a liquid substance.
従来ドーム部を補強する方法はツイータ用ドーム振動板
などでは実施されているがその方法は金属の真空蒸着や
接着剤による接合方法がとられていた。Conventional methods for reinforcing the dome portion, such as dome diaphragms for tweeters, have involved vacuum deposition of metal or bonding using adhesives.
しかしながら小型でしかも薄膜材料を使用する場合この
ような方法は重量の増大をまねき、また工数が犬となっ
て使用が困難であった。However, in the case of a small size and a thin film material, such a method increases the weight and requires a large number of man-hours, making it difficult to use.
しかし本発明によれば接合層は極薄膜の液体層によるフ
ァンデルワールス力を利用するため重量増大が微量であ
り接合作業が非常に簡単に行なえるものである。However, according to the present invention, since the bonding layer utilizes van der Waals force due to the extremely thin liquid layer, the weight increase is minimal and the bonding operation can be performed very easily.
そのためテイフネスが非常に小さいエツジが形成可能と
なりまた高域特性も重しよう材によりある程関任意にコ
ントロールすることが可能になるものである。Therefore, edges with extremely low toughness can be formed, and high-frequency characteristics can also be controlled to a certain degree by using the weighting material.
以下実施例を説明する。Examples will be described below.
実施例 １
ヤング率４５０ｋｇ／ｃｍ２膜厚３０μのポリエステル
薄膜を作成し、第１図に示すように直径１６ｍｍ。Example 1 A polyester thin film having a Young's modulus of 450 kg/cm2 and a film thickness of 30 μm was prepared, and the diameter was 16 mm as shown in FIG.
高さ６ｍｎのドーム部１及び３０ｍｍ径のエツジ部２を
持った振動板３を形成し、更にヤング率２２０００ｋｇ
／ｃｒ２の３０μポリエステルフイルムでエツジ部のな
いドーム４を成形し、前記成形のドーム部１に該ドーム
４を接合した。A diaphragm 3 having a dome portion 1 with a height of 6 mm and an edge portion 2 with a diameter of 30 mm is formed, and further has a Young's modulus of 22000 kg.
A dome 4 without an edge portion was molded from a 30μ polyester film of /cr2, and the dome 4 was joined to the molded dome portion 1.
接合はパラフィン系液体を両フィルムの間に適下し両者
を重ね合わせて後金型を用いてプレスを行ない余分の液
体を取除いて完成した。The bonding was completed by applying a paraffin liquid between the two films, overlapping them, and pressing them using a mold to remove the excess liquid.
実施例 ２
実施例１と同様の方法によりヤング率１５００ｋｇ／ｃ
ｒ２のポリウレタン薄膜（３０μ）およびヤング率１５
０００ｋｉ／Ｃｍ２のポリ塩化ビニールフィルム（３０
μ）を用いプロピンングリコールを接合剤として振動板
を作成した。Example 2 Young's modulus 1500 kg/c by the same method as Example 1
r2 polyurethane thin film (30μ) and Young's modulus 15
000ki/Cm2 PVC film (30
A diaphragm was created using Propin glycol as a bonding agent.
以上のようにして作成した振動板を用いたヘッドホンを
人工耳に装着して測定した音圧周波数特性（カプラー特
性）第２図に示す。Figure 2 shows the sound pressure frequency characteristics (coupler characteristics) measured by attaching the headphones using the diaphragm produced as described above to an artificial ear.
第２図においてａは上記実施例１、ｂは実施例２、Ｃは
ヤング率１５００ｋｇ／ｃｒ３．３０μのポリエチレン
テレフタレートフィルムを上記実施例１と同様に成形し
た振動板を用いた従来例の特性を示している。In Fig. 2, a represents the characteristics of Example 1, b represents Example 2, and C represents the characteristics of a conventional example using a diaphragm made of a polyethylene terephthalate film having a Young's modulus of 1500 kg/cr 3.30μ in the same manner as Example 1. It shows.
本発明に使用する液体は蒸気圧が低く該フィルムに影響
を及ぼさない低粘度物質が使用でき、また振動板の材質
によって適宜選択が可能である。The liquid used in the present invention can be a low viscosity substance that has a low vapor pressure and does not affect the film, and can be appropriately selected depending on the material of the diaphragm.
上記実施例からも明らかなように、本発明のヘッドホン
用振動板によれは、広帯域再生特性に優れ、ｆｏを７０
〜８０Ｈｚにすることが可能となり、かつ高域特性も１
５ｋＨｚ上に保持することができる利点を有するもので
ある。As is clear from the above examples, the headphone diaphragm of the present invention has excellent broadband reproduction characteristics, and has an fo of 70
~80Hz, and the high frequency characteristics are also 1.
It has the advantage of being able to hold above 5kHz.
第１図は本発明の一実施例におけるヘッドホン用振動板
の断面図、第２図は本発明の振動板を用いたーラドホン
ａ、ｂおよび従来例のカプラー特性図である。
１・・・・・・ドーム部、２・・・・・・エツジ部、３
・・・・・・振動板、４・・・・・ドーム。FIG. 1 is a sectional view of a headphone diaphragm according to an embodiment of the present invention, and FIG. 2 is a characteristic diagram of couplers of Radphones A and B using the diaphragm of the present invention and a conventional example. 1...Dome part, 2...Edge part, 3
・・・・Vibration plate, 4・・・Dome.
Claims (1)
一体に形成し、硬質薄膜を成形したドームを上記ドーム
部に液状物質を介在させて一体化したヘッドホン用振動
板。 ２、特許請求の範囲第１項記載のへラドポン用振動板に
おいて、軟質高分子薄膜としてポリエステル薄膜を用い
、硬質薄膜としてポリエステルフィルムを用い、パラフ
ィン系の液状物質を介在させて一体化した＼ラドホン用
振動板。 ３ 特許請求の範囲第１項記載のヘッドホン用振動板に
おいて、軟質高分子薄膜としてポリウレタン薄膜を用い
、硬質薄膜としてポリ塩化ビニールフィルムを用い、プ
ロピレングリコールを介在させて一体化したヘッドホン
用振動板。[Scope of Claims] 1. A vibrator for headphones in which a dome portion and an edge portion are integrally formed by molding a soft polymer thin film, and a dome formed by molding a hard thin film is integrated by interposing a liquid substance in the dome portion. Board. 2. In the diaphragm for Heradpon as set forth in claim 1, a polyester thin film is used as the soft polymer thin film, a polyester film is used as the hard thin film, and a paraffin-based liquid substance is interposed between the two. diaphragm for use. 3. A diaphragm for headphones according to claim 1, in which a polyurethane thin film is used as the soft polymeric thin film, a polyvinyl chloride film is used as the hard thin film, and propylene glycol is interposed between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1060976A JPS5810039B2 (en) | 1976-02-02 | 1976-02-02 | Vibration plate for headphones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1060976A JPS5810039B2 (en) | 1976-02-02 | 1976-02-02 | Vibration plate for headphones |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5293317A JPS5293317A (en) | 1977-08-05 |
| JPS5810039B2 true JPS5810039B2 (en) | 1983-02-23 |
Family
ID=11754973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1060976A Expired JPS5810039B2 (en) | 1976-02-02 | 1976-02-02 | Vibration plate for headphones |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5810039B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6282900A (en) * | 1985-10-08 | 1987-04-16 | Matsushita Electric Ind Co Ltd | Dome type diaphragm for speaker |
| JP4737150B2 (en) * | 2006-08-30 | 2011-07-27 | 日本ビクター株式会社 | Electroacoustic transducer and diaphragm |
| JP4780067B2 (en) * | 2006-08-30 | 2011-09-28 | 日本ビクター株式会社 | Electroacoustic transducer and diaphragm |
| JP2008085985A (en) * | 2006-08-30 | 2008-04-10 | Victor Co Of Japan Ltd | Electroacoustic transducer and diaphragm |
| JP2008085842A (en) * | 2006-09-28 | 2008-04-10 | Victor Co Of Japan Ltd | Manufacturing method for electroacoustic transducer diaphragm |
| JP4783399B2 (en) | 2008-06-04 | 2011-09-28 | ホシデン株式会社 | Dome-shaped diaphragm and speaker using the same |
-
1976
- 1976-02-02 JP JP1060976A patent/JPS5810039B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5293317A (en) | 1977-08-05 |
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