JPH04299700A - Speaker - Google Patents
SpeakerInfo
- Publication number
- JPH04299700A JPH04299700A JP3064387A JP6438791A JPH04299700A JP H04299700 A JPH04299700 A JP H04299700A JP 3064387 A JP3064387 A JP 3064387A JP 6438791 A JP6438791 A JP 6438791A JP H04299700 A JPH04299700 A JP H04299700A
- Authority
- JP
- Japan
- Prior art keywords
- voice coil
- coil
- speaker
- generated
- magnetic field
- 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
- 230000007423 decrease Effects 0.000 claims description 4
- 230000004907 flux Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はボイスコイルから発生す
る磁界を抑制したオーディオ用のスピーカに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio speaker in which the magnetic field generated from a voice coil is suppressed.
【０００２】0002
【従来の技術】以下に従来のスピーカについて説明する
。2. Description of the Related Art A conventional speaker will be explained below.
【０００３】図３に示すように、下部プレート７に立設
したポールピース６の外周にボビン４を配設し、このボ
ビン４上に、ポールピース６と上部プレート３の間に位
置するようにボイスコイル８を巻着している。ボビン４
には振動板１が係着され、振動板１と上部プレート３の
間にダンパ２が配設されている。なお５は界磁部である
。As shown in FIG. 3, a bobbin 4 is disposed around the outer periphery of a pole piece 6 erected on a lower plate 7. A voice coil 8 is wound around it. Bobbin 4
A diaphragm 1 is attached to the diaphragm 1, and a damper 2 is disposed between the diaphragm 1 and the upper plate 3. Note that 5 is a field section.
【０００４】以上にように構成されたスピーカについて
、以下その動作について説明する。界磁部５によりポー
ルピース６から上部プレート３へ直流磁界が発生してお
り、ボイスコイル８に信号電流を流すと、フレミング左
手の法則に基づきボイスコイル８は軸方向の力を受け、
この力はボビン４を通じて振動板１に伝達される。The operation of the speaker configured as described above will be explained below. A DC magnetic field is generated from the pole piece 6 to the upper plate 3 by the field section 5, and when a signal current is passed through the voice coil 8, the voice coil 8 receives an axial force based on Fleming's left hand rule.
This force is transmitted to the diaphragm 1 through the bobbin 4.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら上記の従
来の構成では、ボイスコイル８に信号電流が流れると新
たにボイスコイル８の軸方向に磁界が発生し、スピーカ
周辺に電磁誘導による悪影響を与えるという問題点を有
していた。However, in the conventional configuration described above, when a signal current flows through the voice coil 8, a new magnetic field is generated in the axial direction of the voice coil 8, which adversely affects the area around the speaker due to electromagnetic induction. It had some problems.
【０００６】本発明は上記従来の問題点を解決するもの
で、ボイスコイルから発生する磁界を抑制したスピーカ
を提供することを目的とする。The present invention solves the above-mentioned conventional problems, and aims to provide a speaker in which the magnetic field generated from the voice coil is suppressed.
【０００７】[0007]
【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は、同一ボビンの異なる位置に巻着
したボイスコイルと、第２のコイルを備え、両コイルを
並列に導通させてボイスコイルのインダクタンスと第２
のコイルのインダクタンスが減少する向きに接続した構
成を有している。[Means for Solving the Problem] In order to achieve this object, the speaker of the present invention includes a voice coil and a second coil wound at different positions on the same bobbin, and both coils are electrically connected in parallel. Voice coil inductance and second
The coils are connected in such a direction that their inductance decreases.
【０００８】[0008]
【作用】この構成において、ボイスコイルに流れる信号
電流により発生する磁束と第２のコイルに流れる信号電
流により発生する磁束とが逆向きで打ち消しあい、ボイ
スコイルで発生する磁界をスピーカ周辺で抑制すること
となる。[Operation] In this configuration, the magnetic flux generated by the signal current flowing in the voice coil and the magnetic flux generated by the signal current flowing in the second coil are in opposite directions and cancel each other out, suppressing the magnetic field generated in the voice coil around the speaker. It happens.
【０００９】[0009]
【実施例】以下本発明の一実施例について、図面を参照
しながら説明する。本発明の一実施例を示す図１および
図２では、従来例と同一部品に同一番号を付して説明は
省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2 showing an embodiment of the present invention, parts that are the same as those in the conventional example are given the same numbers and their explanations will be omitted.
【００１０】（実施例１）図１に示すように、ボビン４
上にボイスコイル８と第２のコイル９が巻いてあり、第
２のコイル９はボイスコイル８の上方で振動板１の側に
設けられている。ボイスコイル８と第２のコイル９を並
列に導通させてボイスコイル８のインダクタンスと第２
のコイル９のインダクタンスが減少する向きに接続する
。(Embodiment 1) As shown in FIG.
A voice coil 8 and a second coil 9 are wound on the top, and the second coil 9 is provided above the voice coil 8 and on the side of the diaphragm 1. The voice coil 8 and the second coil 9 are electrically connected in parallel so that the inductance of the voice coil 8 and the second coil 9 are connected in parallel.
The coil 9 is connected in such a direction that its inductance decreases.
【００１１】この構成でボイスコイル８に信号電流を流
すとボイスコイル８から磁束が発生するが、第２のコイ
ル９に流れる信号電流により発生する磁束と打ち消し合
い、ボイスコイル８から発生する磁界をスピーカ周辺で
抑制することができる。With this configuration, when a signal current is passed through the voice coil 8, a magnetic flux is generated from the voice coil 8, but this cancels out the magnetic flux generated by the signal current flowing through the second coil 9, and the magnetic field generated from the voice coil 8 is It can be suppressed around the speaker.
【００１２】（実施例２）図２に示すスピーカにおいて
、図１と異なるのは、第２のコイル９がボイスコイル８
の下方で下部プレート７の側に設けた点である。ボイス
コイル８と第２のコイル９を並列に導通させて、実施例
１と同様に接続させている。(Embodiment 2) In the speaker shown in FIG. 2, the difference from FIG. 1 is that the second coil 9 is the voice coil 8.
This is a point provided on the side of the lower plate 7 below. The voice coil 8 and the second coil 9 are electrically connected in parallel and connected in the same manner as in the first embodiment.
【００１３】ボイスコイル８に信号電流を流すとボイス
コイル８から磁束が発生するが、第２のコイル９に流れ
る信号電流により発生する磁束と打ち消し合い、スピー
カ周辺でボイスコイル８から発生する磁界を抑制するこ
とができる。When a signal current is passed through the voice coil 8, a magnetic flux is generated from the voice coil 8, but this cancels out the magnetic flux generated by the signal current flowing through the second coil 9, thereby reducing the magnetic field generated from the voice coil 8 around the speaker. Can be suppressed.
【００１４】[0014]
【発明の効果】以上の実施例の説明からも明らかなよう
に本発明は、ボイスコイルと第２のコイルを同一ボビン
上に巻き、ボイスコイルと第２のコイルを並列に導通さ
せてボイスコイルのインダクタンスとインダクタンスが
減少する向きに接続する構成により、ボイスコイルに流
れる信号電流により発生する磁束と第２のコイルに流れ
る信号電流により発生する磁束とが、打ち消し合い、ス
ピーカ周辺でボイスコイルから発生する磁界を抑制する
ことができる優れたスピーカを実現できるものである。Effects of the Invention As is clear from the description of the embodiments described above, the present invention has the advantage of winding a voice coil and a second coil on the same bobbin, making the voice coil and the second coil electrically conductive in parallel, and forming a voice coil. By connecting the two inductances in the direction in which the inductance decreases, the magnetic flux generated by the signal current flowing through the voice coil and the magnetic flux generated by the signal current flowing through the second coil cancel each other out, and the magnetic flux generated from the voice coil around the speaker. This makes it possible to realize an excellent speaker that can suppress the magnetic field generated by the magnetic field.
【図１】本発明の第１の実施例のスピーカの構成を示す
断面略図FIG. 1 is a schematic cross-sectional diagram showing the configuration of a speaker according to a first embodiment of the present invention.
【図２】本発明の第２の実施例のスピーカの構成を示す
断面略図FIG. 2 is a schematic cross-sectional diagram showing the configuration of a speaker according to a second embodiment of the present invention.
【図３】従来のスピーカの構成を示す断面略図[Figure 3] Schematic cross-sectional diagram showing the configuration of a conventional speaker
４ ボビン ６ ポールピース ８ ボイスコイル ９ 第２のコイル 4 Bobbin 6 Pole piece 8 Voice coil 9 Second coil
Claims (1)
イルと第２のコイルを巻着し、両コイルを並列に導通さ
せて前記ボイスコイルのインダクタンスと前記第２のコ
イルのインダクタンスが減少する向きに接続したスピー
カ。1. A voice coil and a second coil are wound at different positions on the same bobbin, and both coils are electrically connected in parallel so that the inductance of the voice coil and the inductance of the second coil decrease. Connected speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3064387A JPH04299700A (en) | 1991-03-28 | 1991-03-28 | Speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3064387A JPH04299700A (en) | 1991-03-28 | 1991-03-28 | Speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04299700A true JPH04299700A (en) | 1992-10-22 |
Family
ID=13256861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3064387A Pending JPH04299700A (en) | 1991-03-28 | 1991-03-28 | Speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04299700A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2799919A1 (en) * | 1999-10-19 | 2001-04-20 | Sagem | PERMANENT MAGNET ACTUATOR AND DRIVE ELECTRICAL COIL, ESPECIALLY MOBILE PHONE SPEAKER |
| EP2020167A4 (en) * | 2006-05-25 | 2015-07-22 | Youngtack Shim | Generic electromagnetically-countered systems and methods |
-
1991
- 1991-03-28 JP JP3064387A patent/JPH04299700A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2799919A1 (en) * | 1999-10-19 | 2001-04-20 | Sagem | PERMANENT MAGNET ACTUATOR AND DRIVE ELECTRICAL COIL, ESPECIALLY MOBILE PHONE SPEAKER |
| EP1094686A1 (en) * | 1999-10-19 | 2001-04-25 | Sagem S.A. | Mobile telephone loudspeaker |
| EP2020167A4 (en) * | 2006-05-25 | 2015-07-22 | Youngtack Shim | Generic electromagnetically-countered systems and methods |
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