JPH04335799A - Speaker - Google Patents
SpeakerInfo
- Publication number
- JPH04335799A JPH04335799A JP10721191A JP10721191A JPH04335799A JP H04335799 A JPH04335799 A JP H04335799A JP 10721191 A JP10721191 A JP 10721191A JP 10721191 A JP10721191 A JP 10721191A JP H04335799 A JPH04335799 A JP H04335799A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- voice coil
- magnetic flux
- speaker
- magnetic
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000004907 flux Effects 0.000 abstract description 19
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 abstract description 12
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 239000006247 magnetic powder Substances 0.000 description 6
- 230000005236 sound signal Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052709 silver Inorganic materials 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】本発明は各種音響機器及び映像機
器に用いられるスピーカに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to speakers used in various audio and video equipment.
【０００２】0002
【従来の技術】最近の車載用スピーカにおいては自動車
の燃費の向上ための軽量化及び取付けの省スペース化が
求められている。また、映像機器用スピーカはハイビジ
ョンをはじめとする映像機器の高細精度化にともない、
低磁気漏洩化が求められているとともに高音質化が不可
欠である。2. Description of the Related Art In recent years, in-vehicle speakers are required to be lightweight and space-saving in order to improve the fuel efficiency of automobiles. In addition, speakers for video equipment are becoming more precise as video equipment, including high-definition, becomes more precise.
While low magnetic leakage is required, high sound quality is also essential.
【０００３】従来のこの種のスピーカについては高エネ
ルギー積の厚み方向異方性を有する磁石を用いた内磁型
及びラジアル配向された磁石を用いた内磁型の磁気回路
構成を有するスピーカが用いられている。Conventional speakers of this type include speakers having a magnetic circuit configuration of an internal magnetic type using a magnet with a high energy product and anisotropy in the thickness direction, and an internal magnetic type using a radially oriented magnet. It is being
【０００４】従来のこの種のスピーカについて図４を用
いて説明する。図４において１５は磁石を示し、磁石１
５の内縁にセンターポール１６を接着固定し、磁石１５
の外縁に規定の距離隔てた位置に壷形のヨーク１７が配
置されるようにセンターポール１６とヨーク１７を接着
，溶接，カシメ等で機械的に固定して磁気回路１９を構
成し、この磁気回路１９の空隙１８に磁束を誘導してい
る。また、ヨーク１７にはフレーム１４が接着，溶接，
カシメ等で機械的に固定されている。また、１２はボイ
スコイルを示し、このボイスコイル１２は空隙１８内に
一端を挿入し、他端は周縁部がフレーム１４に保持され
た振動板１１の中心部に固着されている。１３はダンパ
ーを示し、このダンパー１３の周縁部はフレーム１４に
接着固定され内周部をボイスコイル１２に接着固定して
ボイスコイル１２を支持している。A conventional speaker of this type will be explained using FIG. 4. In FIG. 4, 15 indicates a magnet, and magnet 1
The center pole 16 is adhesively fixed to the inner edge of the magnet 15.
A magnetic circuit 19 is constructed by mechanically fixing the center pole 16 and the yoke 17 by gluing, welding, caulking, etc. so that the pot-shaped yoke 17 is placed at a predetermined distance from the outer edge of the center pole 16. Magnetic flux is induced into the air gap 18 of the circuit 19. Further, the frame 14 is attached to the yoke 17 by bonding, welding,
It is fixed mechanically with caulking, etc. Reference numeral 12 denotes a voice coil, one end of which is inserted into the cavity 18, and the other end of which is fixed to the center of the diaphragm 11 whose peripheral edge is held by the frame 14. Reference numeral 13 denotes a damper, and the peripheral edge of the damper 13 is adhesively fixed to the frame 14, and the inner peripheral part is adhesively fixed to the voice coil 12 to support the voice coil 12.
【０００５】この図４に示すスピーカにおいて、ボイス
コイル１２に音声信号が供給されると空隙１８内の磁束
によりボイスコイル１２が上下動して振動板１１を音声
信号に応じて振動させ音声信号に応じた音声を発生させ
る。In the speaker shown in FIG. 4, when an audio signal is supplied to the voice coil 12, the voice coil 12 moves up and down due to the magnetic flux in the air gap 18, causing the diaphragm 11 to vibrate in accordance with the audio signal. Generates a corresponding sound.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、前記の
従来技術においては次の問題点を有するものであった。However, the above-mentioned prior art has the following problems.
【０００７】すなわち、ボイスコイル１２に流れる音声
電流により磁界が発生しヨーク１７の上部及び磁石１５
内を磁束が流れ、磁石１５より発生する磁界による主磁
束を妨げ高調波歪が発生するものであった。That is, a magnetic field is generated by the audio current flowing through the voice coil 12, and the upper part of the yoke 17 and the magnet 15
A magnetic flux flows inside the magnet 15 and interferes with the main magnetic flux due to the magnetic field generated by the magnet 15, causing harmonic distortion.
【０００８】本発明はこのような従来の問題点を解決す
るもので、その目的とするところは、磁気回路とボイス
コイルにより発生する磁束による高調波歪を低減する高
性能なスピーカを提供するものである。The present invention is intended to solve these conventional problems, and its purpose is to provide a high-performance speaker that reduces harmonic distortion due to magnetic flux generated by a magnetic circuit and voice coil. It is.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するため
に本発明のスピーカは、磁石内に導電性リングを設けて
ボイスコイルより発生した磁束を導電性リングにより短
絡させるように構成したものである。[Means for Solving the Problems] In order to solve the above problems, the speaker of the present invention is configured such that a conductive ring is provided within the magnet so that the magnetic flux generated from the voice coil is short-circuited by the conductive ring. be.
【００１０】0010
【作用】この構成により、ボイスコイルにより発生する
磁束はヨーク上部及び磁石内を流れず、導電性リングに
短絡され、磁石から発生する主磁束を妨げない。従って
、主磁束の変動に起因する高調波歪の発生が低減するこ
とになる。[Operation] With this configuration, the magnetic flux generated by the voice coil does not flow through the upper part of the yoke and inside the magnet, but is short-circuited to the conductive ring, and does not interfere with the main magnetic flux generated from the magnet. Therefore, the occurrence of harmonic distortion due to fluctuations in the main magnetic flux is reduced.
【００１１】[0011]
【実施例】以下、本発明のスピーカの一実施例を図面を
用いて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the speaker of the present invention will be described below with reference to the drawings.
【００１２】図１は本発明の一実施例を示すスピーカの
断面図、図２は本発明の一実施例の磁気回路の断面図、
図３は本発明の他の実施例を示すスピーカの断面図であ
る。FIG. 1 is a cross-sectional view of a speaker showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of a magnetic circuit according to an embodiment of the present invention,
FIG. 3 is a sectional view of a speaker showing another embodiment of the present invention.
【００１３】図１にもとづき以下に詳細を説明する。１
はコーン状の振動板、２は上記振動板１の中央部に結合
されたボイスコイル、３はこのボイスコイル２の中間部
を保持するダンパー、４はフレーム、５はリング状の磁
石、６は上記磁石を上部に結合したセンターポール、７
は上記センターポール６を内部中央に結合したヨーク、
８は上記磁石５とヨーク７との間に形成した空隙、９は
磁石５内に配置された高導電率の導電性リング、１１は
磁気回路である。Details will be explained below based on FIG. 1. 1
2 is a cone-shaped diaphragm, 2 is a voice coil coupled to the center of the diaphragm 1, 3 is a damper that holds the middle part of the voice coil 2, 4 is a frame, 5 is a ring-shaped magnet, and 6 is a ring-shaped magnet. Center pole with the above magnet coupled to the upper part, 7
is a yoke in which the center pole 6 is joined to the inner center;
8 is an air gap formed between the magnet 5 and the yoke 7, 9 is a highly conductive ring disposed within the magnet 5, and 11 is a magnetic circuit.
【００１４】磁石５はほぼ中央部に高導電率材料（例え
ばＣｕ，Ａｇ，Ａｌ等）を用いた導電性リング９を有す
る高エネルギー積の磁性粉（例えばＮｄ−Ｆｅ系磁性粉
、Ｓｍ−Ｃｏ系磁性粉等）とバインダー（例えばエポキ
シ樹脂）により一体圧縮成型されたものであり、径方向
に着磁されている。センターポール６の上部に固定され
た磁石５の周縁部と凹形状したヨーク７は所要の距離を
もった位置に配置され空隙８を形成して磁気回路１１を
構成している。The magnet 5 is made of high energy product magnetic powder (for example, Nd-Fe magnetic powder, Sm-Co It is integrally compressed and molded with magnetic powder, etc.) and a binder (e.g., epoxy resin), and is magnetized in the radial direction. The peripheral edge of the magnet 5 fixed to the upper part of the center pole 6 and the concave yoke 7 are arranged at a predetermined distance from each other to form a gap 8 to form a magnetic circuit 11.
【００１５】また、凹形状したヨーク７は上部に鉄板，
樹脂，アルミダイカス等で構成されたフレーム４が接着
，溶接，ビス固定などで接合固定されている。また、ボ
イスコイル２は空隙８内に一端を挿入し他端は周縁部が
フレーム４に保持された振動板１の中心部に固着されて
いる。ダンパー３は周縁部をフレーム４に、中心部をボ
イスコイル２に接着固定しボイスコイル２を支持してい
る。Further, the concave yoke 7 has an iron plate on the upper part,
A frame 4 made of resin, aluminum die cast, etc. is fixed by bonding, welding, screw fixing, etc. The voice coil 2 has one end inserted into the gap 8 and the other end fixed at the center of the diaphragm 1 held by the frame 4 at its peripheral edge. The damper 3 supports the voice coil 2 by adhesively fixing the peripheral portion to the frame 4 and the center portion to the voice coil 2.
【００１６】前述構成において磁石５より発生する磁束
は図２に示す矢印ａのように磁石５→空隙８→ヨーク７
→磁石５の順で流れ閉磁気回路を構成する。ボイスコイ
ル２に流れる音声電流により矢印ｃのように磁束が発生
するが導電性リング９により短絡され、磁石５より発生
した磁束ａに変化を与えない。従って、空隙８内の磁束
は常に安定している。In the above structure, the magnetic flux generated by the magnet 5 is transmitted from the magnet 5 to the air gap 8 to the yoke 7 as shown by the arrow a in FIG.
→A closed magnetic circuit is constructed in the order of magnet 5. A magnetic flux is generated as indicated by an arrow c due to the audio current flowing through the voice coil 2, but it is short-circuited by the conductive ring 9, so that the magnetic flux a generated from the magnet 5 does not change. Therefore, the magnetic flux within the air gap 8 is always stable.
【００１７】上記図１の構成のスピーカにおいて、ボイ
スコイル２に音声信号が供給されると空隙８内の磁束に
よりボイスコイル２が振動し振動板１を音声信号に応じ
て振動させ、このスピーカより音声信号に応じた音声を
発生させる。In the speaker having the configuration shown in FIG. 1, when an audio signal is supplied to the voice coil 2, the voice coil 2 vibrates due to the magnetic flux in the air gap 8, causing the diaphragm 1 to vibrate in accordance with the audio signal, and from this speaker. Generates sound according to the audio signal.
【００１８】図３は本発明による他の実施例のスピーカ
の断面図であり、高導電率材料（例えばＡｕ，Ａｇ，Ａ
ｌ等）を用いたＵ形状のキャップ１０を高エネルギー積
の磁性粉（例えばＮｄ−Ｆｅ系磁性粉、Ｓｍ−Ｃｏ系磁
性粉等）とバインダー（例えばエポキシ樹脂）で一体圧
縮成型された磁石５の外周に被せられている。FIG. 3 is a cross-sectional view of another embodiment of a speaker according to the present invention, which is made of a highly conductive material (eg, Au, Ag, Al
A magnet 5 is formed by integrally compressing and molding a U-shaped cap 10 using high-energy product magnetic powder (e.g. Nd-Fe magnetic powder, Sm-Co magnetic powder, etc.) and a binder (e.g. epoxy resin). It is covered around the outer periphery of.
【００１９】本発明による構成のスピーカは磁石５内に
導電性リング９を一体圧縮成型するか、磁石の外周部に
導電性キャップ１０を被せることによりボイスコイル２
に流れる音声電流により発生する磁束を導電性リング９
により短絡し高調波歪の低減を図りスピーカの低歪率化
が可能になる。更には、高精度で製造が容易であり組み
立てて工数も削減でき、経済的で低歪率，軽量，低磁気
漏洩のスピーカを提供するものである。In the speaker constructed according to the present invention, the voice coil 2 is formed by integrally compression molding the conductive ring 9 inside the magnet 5 or by covering the outer periphery of the magnet with a conductive cap 10.
The magnetic flux generated by the audio current flowing through the conductive ring 9
This short-circuits and reduces harmonic distortion, making it possible to lower the distortion rate of the speaker. Furthermore, the present invention provides a speaker that is highly accurate, easy to manufacture, requires less man-hours for assembly, is economical, has low distortion, is lightweight, and has low magnetic leakage.
【００２０】[0020]
【発明の効果】以上のように本発明によれば次のような
効果を有する磁石内に導電率リングを一体圧縮成型する
ことによりボイスコイルに流れる音声電流により発生す
る磁束に起因する高調波の発生を低減し低歪率化が図れ
る。更に、磁石内に一体成型することにより高精度で製
造も容易で組立工数も削減でき、経済的で軽量，低歪率
，低磁気漏洩のスピーカを高品質で生産可能であり車載
用スピーカの軽量化，薄型化に伴う自動車の燃費の向上
、更にはハイビジョンをはじめとする映像機器の高細精
度に対応可能であり工業的にもその効果は大である。As described above, according to the present invention, harmonics caused by the magnetic flux generated by the audio current flowing through the voice coil can be suppressed by integrally compression molding the conductive ring inside the magnet, which has the following effects. It is possible to reduce the occurrence of distortion and lower the distortion rate. Furthermore, by integrally molding the magnet, it is highly accurate, easy to manufacture, and reduces the number of assembly steps, making it possible to produce high-quality, economical, lightweight, low distortion, and low magnetic leakage speakers, making it possible to produce lightweight speakers for cars. It can also be used to improve the fuel efficiency of automobiles as they become thinner and thinner, as well as to meet the high precision of video equipment such as high-definition, and has great industrial effects.
【図１】本発明の一実施例におけるスピーカの断面図[Fig. 1] A cross-sectional view of a speaker in an embodiment of the present invention.
【
図２】本発明の一実施例における磁気回路の構成図[
Figure 2: Configuration diagram of a magnetic circuit in one embodiment of the present invention
【図
３】本発明の他の実施例におけるスピーカの断面図FIG. 3 is a sectional view of a speaker in another embodiment of the present invention.
【図
４】従来のスピーカの断面図[Figure 4] Cross-sectional view of a conventional speaker
１ 振動板 ２ ボイスコイル ３ ダンパー ４ フレーム ５ 磁石 ６ センターポール ７ ヨーク ８ 空隙 ９ 導電性リング １０ 導電性キャップ 1. Vibration plate 2 Voice coil 3 Damper 4 Frame 5. Magnet 6 Center pole 7 York 8 Voids 9 Conductive ring 10 Conductive cap
Claims (2)
グを備えるように一体成形された磁石を設け、このセン
ターポールを内部に配置したヨークからなる磁気回路に
フレームを設け、このフレームに周縁部を取付けた振動
板に結合したボイスコイルを上記磁気回路の空隙にはめ
こんでなるスピーカ。Claim 1: A magnet integrally molded with a conductive ring inside is provided on the upper part of a center pole, a frame is provided in a magnetic circuit consisting of a yoke in which the center pole is placed inside, and a frame is provided on the frame with a peripheral edge thereof. A speaker in which a voice coil coupled to a diaphragm to which a diaphragm is attached is inserted into a gap in the magnetic circuit.
周部に導電性キャップを被せ、このセンターポールを内
部に配置したヨークよりなる磁気回路に振動系部品を組
み込んでなるスピーカ。2. A speaker in which a conductive cap is placed over the outer periphery of a magnet attached to the upper part of a center pole, and a vibration system component is incorporated into a magnetic circuit consisting of a yoke in which the center pole is placed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10721191A JPH04335799A (en) | 1991-05-13 | 1991-05-13 | Speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10721191A JPH04335799A (en) | 1991-05-13 | 1991-05-13 | Speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04335799A true JPH04335799A (en) | 1992-11-24 |
Family
ID=14453304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10721191A Pending JPH04335799A (en) | 1991-05-13 | 1991-05-13 | Speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04335799A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6774510B1 (en) * | 2000-10-25 | 2004-08-10 | Harman International Industries, Inc. | Electromagnetic motor with flux stabilization ring, saturation tips, and radiator |
-
1991
- 1991-05-13 JP JP10721191A patent/JPH04335799A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6774510B1 (en) * | 2000-10-25 | 2004-08-10 | Harman International Industries, Inc. | Electromagnetic motor with flux stabilization ring, saturation tips, and radiator |
| US7012345B2 (en) | 2000-10-25 | 2006-03-14 | Harman International Industries, Inc. | Electromagnetic motor with flux stabilization ring, saturation tips, and radiator |
| US7057314B2 (en) | 2000-10-25 | 2006-06-06 | Harman International Industries, Inc. | Electromagnetic motor system capable of removing heat away from its magnetic gap |
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