JPH0550626U - Electrostatic shield Electromagnetic shield unbalanced cable for musical instruments - Google Patents
Electrostatic shield Electromagnetic shield unbalanced cable for musical instrumentsInfo
- Publication number
- JPH0550626U JPH0550626U JP11390191U JP11390191U JPH0550626U JP H0550626 U JPH0550626 U JP H0550626U JP 11390191 U JP11390191 U JP 11390191U JP 11390191 U JP11390191 U JP 11390191U JP H0550626 U JPH0550626 U JP H0550626U
- Authority
- JP
- Japan
- Prior art keywords
- musical instruments
- cable
- shield
- wire
- unbalanced
- 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.)
- Pending
Links
Landscapes
- Communication Cables (AREA)
Abstract
(57)【要約】 （修正有）
【目的】電気楽器の使用に際し、ノイズ源の多い場所で
も接続ケーブルからのノイズの混入をふせぐ。
【構成】対撚り線または４芯撚り線を信号線とし、さら
に周囲を導体で囲み１点接地して静電シールドとする。
(57) [Summary] (Corrected) [Purpose] When using an electric musical instrument, prevent the mixing of noise from the connecting cable even in locations with many noise sources. [Structure] A twisted pair wire or a four-core twisted wire is used as a signal wire, and the circumference is surrounded by a conductor to be grounded at one point to form an electrostatic shield.
Description
【０００１】[0001]
この考案は、外来ノイズを拾わないよう工夫した楽器用不平衡ケーブルに 関するものである。 ここでいう楽器用不平衡ケーブルとは電気楽器相互間を接続する不平衡の 信号ラインに使用されるものであり平衡型のものは含まない。 The present invention relates to an unbalanced cable for musical instruments designed so as not to pick up external noise. The unbalanced cables for musical instruments used here are those used for unbalanced signal lines that connect electric musical instruments to each other, and do not include balanced cables.
【０００２】[0002]
従来の楽器用ケーブルは伝送方法が不平衡であることから、単なる１芯の シールド線であった。 The conventional cable for musical instruments is a single-core shielded wire because the transmission method is unbalanced.
【０００３】[0003]
最近、音楽演奏の現場は、電磁環境的に大変悪いものになってきている。 コンピュータや各種デジタル楽器を使用した演奏が現れ、それらの機器か らのデジタルパルスによる輻射ノイズがあり、照明機器からの調光器ノイ ズ、更にワイヤレスマイクや連絡用トランシーバからの電波の混入もおこ りやすい。 マイクロホンの信号ラインは従来から平衡型が一殿的であり耐ノイズ性が 大きいが、電気楽器類は依然として不平衡伝送が普通であり、ノイズを拾 いやすい。 本考案はこの欠点を改善するためになされたものである。 Recently, the place of music performance has become very bad in terms of electromagnetic environment. Performances using computers and various digital musical instruments appeared, there was radiation noise due to digital pulses from those devices, noise from dimmers from lighting equipment, and radio waves from wireless microphones and communication transceivers were mixed. Easy The microphone signal line has traditionally been balanced and has high noise immunity, but electric musical instruments still normally use unbalanced transmission, making it easy to pick up noise. The present invention has been made to remedy this drawback.
【０００４】[0004]
信号の流れる２本の電線を、従来の同軸構造ではなく、電磁シールドの効 果のある対撚り線 Instead of the conventional coaxial structure, the two wires through which the signal flows are twisted wires with an electromagnetic shield effect.
【請求項２】、またはより電磁シールドの効果の高い４ 芯撚り線2. A 4-core stranded wire having a high electromagnetic shield effect
【請求項３】にする そのうえで信号線の周囲に銅線を円筒状に編んだりアルミテープや銅テー プを巻いて、ケーブルの一端で、接地側の信号線と接続して１点接地とす る。 接地側の信号線と接続した一端は、より対地電圧の低い電気楽器に接続さ れるものとする。3. Then, a copper wire is braided in a cylindrical shape around the signal line, or aluminum tape or copper tape is wound around the signal line, and one end of the cable is connected to the signal line on the ground side. It One end connected to the signal line on the ground side shall be connected to an electric musical instrument with a lower ground voltage.
【０００５】[0005]
【作用】 外来ノイズの内、静電誘導によるものは静電シールドによって防ぎ、電磁 誘導によるものは、対撚り線、または４芯撚り線の電磁シールド効果によ って誘導障害を緩和することができる。[Function] Of the external noise, the one caused by electrostatic induction can be prevented by the electrostatic shield, and the one caused by electromagnetic induction can alleviate the induction failure by the electromagnetic shield effect of the twisted pair wire or the four-core twisted wire. it can.
【０００６】[0006]
エレキギター・ギターアンプ間は、ギターアンプの入力インピーダンスが １ＭΩと高いため、浮遊容量が少なく浮遊容量による高域の減衰の僅かな 対撚り線のケーブルが適している。 プリアンプ・メインアンプ間はメインアンプの入力インピーダンスが５０ ＫΩと低いめであることから、浮遊容量の多い４芯撚りのケーブルをつか うことができ対撚り線のものより更に効果が大きい。 Between the electric guitar and the guitar amplifier, the input impedance of the guitar amplifier is as high as 1 MΩ, so a twisted pair cable with little stray capacitance and low attenuation in the high range due to stray capacitance is suitable. Since the input impedance of the main amplifier between the preamplifier and the main amplifier is as low as 50 KΩ, it is possible to use a 4-core twisted cable with a large stray capacitance, which is even more effective than the twisted pair type.
【０００７】[0007]
本案は以上のような構造で、従来の楽器用不平衡ケーブルにくらべ著しく 低雑音であり、良好な音質を安定して得ることができる。 The present invention has the above-mentioned structure, has significantly lower noise than conventional unbalanced cables for musical instruments, and can stably obtain good sound quality.
【図面の簡単な説明】[Brief description of drawings]
【図１】本考案の、グランド線の接続を示したものであ
る。ＮＣとあるのはどこへも接続しないことを意味す
る。FIG. 1 shows a connection of a ground wire of the present invention. NC means not connected to anywhere.
【図２】本考案の、信号線の接続を示したものである。
４芯撚り線は、向かい合う２線同士をケーブルの両端で
それぞれ短絡し、信号線Ａ、信号線Ｂとする。FIG. 2 shows connection of signal lines according to the present invention.
As for the 4-core stranded wire, two facing wires are short-circuited at both ends of the cable to form a signal wire A and a signal wire B, respectively.
１ 信号線Ａ ２ 信号線Ｂ ３ グランド線 1 Signal line A 2 Signal line B 3 Ground line
Claims (3)
ドを施した楽器用不平衡ケーブル。1. An unbalanced cable for musical instruments, wherein an electromagnetically shielded cable is provided with an electrostatic shield.
り線を使った請求項１の楽器用ケーブル。2. The musical instrument cable according to claim 1, wherein a twisted pair is used as the electromagnetically shielded cable.
撚り線を使った請求項１の楽器用ケーブル。3. The musical instrument cable according to claim 1, wherein a 4-core stranded wire is used as the electromagnetically shielded cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11390191U JPH0550626U (en) | 1991-12-07 | 1991-12-07 | Electrostatic shield Electromagnetic shield unbalanced cable for musical instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11390191U JPH0550626U (en) | 1991-12-07 | 1991-12-07 | Electrostatic shield Electromagnetic shield unbalanced cable for musical instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0550626U true JPH0550626U (en) | 1993-07-02 |
Family
ID=14624003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11390191U Pending JPH0550626U (en) | 1991-12-07 | 1991-12-07 | Electrostatic shield Electromagnetic shield unbalanced cable for musical instruments |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0550626U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016143476A (en) * | 2015-01-30 | 2016-08-08 | 本田技研工業株式会社 | Ground structure of electronic device, electronic device having ground structure, and ground cable for ground structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3088226B2 (en) * | 1992-11-30 | 2000-09-18 | エイ・ティ・アンド・ティ・コーポレーション | Cellular radio telephone system |
-
1991
- 1991-12-07 JP JP11390191U patent/JPH0550626U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3088226B2 (en) * | 1992-11-30 | 2000-09-18 | エイ・ティ・アンド・ティ・コーポレーション | Cellular radio telephone system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016143476A (en) * | 2015-01-30 | 2016-08-08 | 本田技研工業株式会社 | Ground structure of electronic device, electronic device having ground structure, and ground cable for ground structure |
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