JPH04324799A - Speaker - Google Patents
SpeakerInfo
- Publication number
- JPH04324799A JPH04324799A JP9402691A JP9402691A JPH04324799A JP H04324799 A JPH04324799 A JP H04324799A JP 9402691 A JP9402691 A JP 9402691A JP 9402691 A JP9402691 A JP 9402691A JP H04324799 A JPH04324799 A JP H04324799A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnet
- speaker
- diaphragm
- unpolished
- 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
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 8
- 239000006247 magnetic powder Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005245 sintering Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000003466 welding 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】一般にスピーカの漏洩磁束は小さいこと
が要求される。特にカラーテレビジョン受像機用のスピ
ーカについては低磁気漏洩タイプが望まれる。また、今
後普及が予想される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、より低磁気漏洩化が求めら
れている。2. Description of the Related Art Generally, a speaker is required to have a small leakage magnetic flux. In particular, low magnetic leakage type speakers are desired for color television receivers. Furthermore, with the increasing precision of video equipment such as high-definition, which is expected to become popular in the future, there is a need for even lower magnetic leakage.
【０００３】すなわち、一般に上記映像機器においては
陰極線管の下部または側面にスピーカが配置されるが、
このような構成においてスピーカから大きな磁気漏洩を
生じると、陰極線管内の電子ビームが偏向されけい光面
上において一点に収束されず色ずれの発生という不具合
を生じる。[0003] That is, in the above-mentioned video equipment, speakers are generally placed below or on the side of the cathode ray tube;
In such a configuration, if large magnetic leakage occurs from the speaker, the electron beam in the cathode ray tube will be deflected and not converged on one point on the phosphor surface, resulting in a problem of color shift.
【０００４】従って、従来から磁気漏洩を低下させるた
めに多くの努力がなされ、現在では以下に述べるような
構成のスピーカが実用化されている。以下図面を参照し
ながら従来の低磁気漏洩磁気回路を用いたスピーカにつ
いて説明する。図２は従来の低磁気漏洩磁気回路を用い
たスピーカを示すものである。図２において、１は振動
板、２はボイスコイル、３はダストキャップ、４はダン
パー、５はフレーム、６はセンターポール、７は上記セ
ンターポール６と所定の距離離れたリング状の上部プレ
ート、８は主磁石、９は下部プレート、１３は上記セン
ターポール６と所定の距離離れたリング状の上部プレー
ト７により構成される上記ボイスコイル２の挿入用磁気
空隙であり、主磁石８の磁束が導かれ主磁束ａが流れる
。１１は主磁石８と逆極性に磁化された補助磁石、１２
は上記リング状の上部プレート７の外縁部と補助磁石１
１に接着されたシールドカバーであり補助磁石１１の磁
束をリング状の上部プレート７、センターポール６、下
部プレート９により磁気回路を構成し磁気ギャップ１３
に磁束ｂを導く構成となっている。[0004] Therefore, many efforts have been made to reduce magnetic leakage, and speakers having the configurations described below are currently in practical use. A speaker using a conventional low magnetic leakage magnetic circuit will be described below with reference to the drawings. FIG. 2 shows a speaker using a conventional low magnetic leakage magnetic circuit. In FIG. 2, 1 is a diaphragm, 2 is a voice coil, 3 is a dust cap, 4 is a damper, 5 is a frame, 6 is a center pole, 7 is a ring-shaped upper plate separated from the center pole 6 by a predetermined distance, 8 is a main magnet, 9 is a lower plate, and 13 is a magnetic gap for inserting the voice coil 2, which is composed of a ring-shaped upper plate 7 separated from the center pole 6 by a predetermined distance. The main magnetic flux a flows. 11 is an auxiliary magnet magnetized with the opposite polarity to the main magnet 8; 12
is the outer edge of the ring-shaped upper plate 7 and the auxiliary magnet 1
The magnetic flux of the auxiliary magnet 11 is connected to the magnetic gap 13 by forming a magnetic circuit with the ring-shaped upper plate 7, center pole 6, and lower plate 9.
The configuration is such that magnetic flux b is guided to.
【０００５】このように構成された低磁気漏洩磁気回路
は、主磁石８による主磁束ａと補助磁石１１の磁束ｂと
の合成磁束によって磁気ギャップ１３の磁束は構成され
る。また、主磁石８による漏洩磁束ｃと補助磁石１１に
よる漏洩磁束ｄは、ともに外部に漏洩することなく軟磁
性材料で構成されたシールドカバー１２により磁気シー
ルドされるものであり、外部への磁気漏洩を充分小さく
できる。更に、磁気ギャップ１３の磁束は主磁石８によ
る主磁束ａと補助磁石１１による磁束ｂとの合成磁束に
なり効率の良い低磁気回路であった。In the thus constructed low magnetic leakage magnetic circuit, the magnetic flux in the magnetic gap 13 is constituted by the composite magnetic flux of the main magnetic flux a of the main magnet 8 and the magnetic flux b of the auxiliary magnet 11. In addition, both the leakage magnetic flux c due to the main magnet 8 and the leakage magnetic flux d due to the auxiliary magnet 11 are magnetically shielded by the shield cover 12 made of a soft magnetic material without leaking to the outside, so that no magnetic leakage to the outside occurs. can be made sufficiently small. Furthermore, the magnetic flux of the magnetic gap 13 is a composite magnetic flux of the main magnetic flux a caused by the main magnet 8 and the magnetic flux b caused by the auxiliary magnet 11, resulting in an efficient low magnetic circuit.
【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。However, the above-mentioned prior art has the following problems.
【０００７】（１）補助磁石１１にも焼結後両面研磨加
工した高価な磁石を使用しているため高価になる。(1) The auxiliary magnet 11 is also expensive because it uses an expensive magnet that has been polished on both sides after sintering.
【０００８】（２）焼結後の湿式製法で製造された未研
磨磁石を使用した場合は水分を吸引するフィルター面に
凹凸があり磁気効率が悪化していた。(2) When an unpolished magnet manufactured by a wet method after sintering is used, the filter surface that attracts moisture has irregularities, which deteriorates the magnetic efficiency.
【０００９】本発明は上記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、低磁気漏洩タイプのスピ
ーカの安価な磁気回路の効率化、更には、組み立て工数
の少ないスピーカの構成を提供するものである。The present invention is intended to solve the above-mentioned conventional problems, and its purpose is to improve the efficiency of an inexpensive magnetic circuit of a low-magnetic leakage type speaker, and furthermore, to create a speaker configuration that requires fewer assembly steps. This is what we provide.
【００１０】0010
【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補助磁石に焼結後の未研磨フェラ
イト磁石を用い、磁気回路を構成するプレート，シール
ドカバーとの接着に透磁率材料とバインダーを用いた磁
気回路の構成を提供するものである。[Means for Solving the Problems] In order to achieve this object, the speaker of the present invention uses a sintered, unpolished ferrite magnet as an auxiliary magnet, and has a magnetic permeability for adhesion to the plate and shield cover that constitute the magnetic circuit. It provides a configuration of a magnetic circuit using materials and a binder.
【００１１】[0011]
【作用】この構成により、凹凸面を有する未研磨フェラ
イト磁石と磁気回路を構成するプレートまたは、シール
ドカバーとの間に空隙が生じないため磁石効率が低下す
ることなく焼結後の未研磨フェライト磁石が利用でき安
価な磁気回路が実現できる。[Function] With this configuration, no air gap is created between the unpolished ferrite magnet with an uneven surface and the plate or shield cover that constitutes the magnetic circuit, so the unpolished ferrite magnet after sintering does not reduce magnet efficiency. can be used to realize an inexpensive magnetic circuit.
【００１２】0012
【実施例】図１は本発明の一実施例を示すスピーカの断
面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of a speaker showing an embodiment of the present invention.
【００１３】図１にもとづき以下に詳細を説明する。２
１は振動板、２２はボイスコイル、２３はダストキャッ
プ、２４はダンパー、２５はフレーム、２６はセンター
ポール、２７は上部プレート、２８は主磁石、２９は下
部プレート、３０は接合部、３１は補助磁石、３２はシ
ールドカバー、３３は磁気ギャップである。Details will be explained below based on FIG. 1. 2
1 is a diaphragm, 22 is a voice coil, 23 is a dust cap, 24 is a damper, 25 is a frame, 26 is a center pole, 27 is an upper plate, 28 is a main magnet, 29 is a lower plate, 30 is a joint, 31 is An auxiliary magnet, 32 a shield cover, and 33 a magnetic gap.
【００１４】湿式製法で製造された未研磨フェライト磁
石の補助磁石３１のフィルター面は透磁率及び飽和磁束
密度の高い磁性粉材料（例えば純鉄，パーマロイ等）と
バインダー（例えばエポキシ樹脂）による接合部３０に
より下部プレート２９に接合されている。更に、補助磁
石３１は主磁石２８と逆極性に着磁されており、その磁
束はリング状の上部プレート２７の外縁部に接合された
シールドカバー３２と上部プレート２７と所定の距離に
位置したセンターポール２６と下部プレート２９により
構成された磁気回路により導かれ、主磁石２８と上部プ
レート２７とセンターポール２６と下部プレート２９に
より構成される磁気回路の主磁束との合磁束となり磁気
ギャップ３３の磁束を構成する。The filter surface of the auxiliary magnet 31 of the unpolished ferrite magnet manufactured by the wet method is a joint made of a magnetic powder material (for example, pure iron, permalloy, etc.) with high magnetic permeability and saturation magnetic flux density and a binder (for example, epoxy resin). 30 to the lower plate 29. Furthermore, the auxiliary magnet 31 is magnetized with a polarity opposite to that of the main magnet 28, and its magnetic flux is transmitted between the shield cover 32 joined to the outer edge of the ring-shaped upper plate 27 and the center located at a predetermined distance from the upper plate 27. The magnetic flux of the magnetic gap 33 is guided by the magnetic circuit composed of the pole 26 and the lower plate 29, and becomes a combined magnetic flux with the main magnetic flux of the magnetic circuit composed of the main magnet 28, the upper plate 27, the center pole 26, and the lower plate 29. Configure.
【００１５】また、リング状の上部プレート２７の磁石
接着固定面の反対側に鉄板，樹脂，アルミダイカス等で
構成されたフレーム２５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２２は磁気ギャ
ップ３３内に一端を挿入し他端は周縁部がフレーム２５
に保持された振動板２１の中心部に固着されている。ダ
ンパー２４は周縁部をフレーム２５に、中心部をボイス
コイル２２に接着固定しボイスコイル２２を支持してい
る。また、主磁石２８による漏洩磁束と補助磁石３１に
よる漏洩磁束は互いに打ち消し合うとともに外部に漏洩
することなく軟磁性材料で構成されたシールドカバー３
２により磁気シールドされる。Further, on the opposite side of the ring-shaped upper plate 27 from the magnet adhesively fixed surface, a frame 25 made of iron plate, resin, aluminum die cast, etc. is fixedly bonded and fixed by bonding, welding, screw fixing, or the like. Also, the voice coil 22 has one end inserted into the magnetic gap 33, and the other end has a peripheral edge that is connected to the frame 25.
The diaphragm 21 is fixed to the center of the diaphragm 21 held by the diaphragm 21 . The damper 24 supports the voice coil 22 by adhesively fixing the peripheral portion to the frame 25 and the center portion to the voice coil 22. Furthermore, the leakage magnetic flux due to the main magnet 28 and the leakage magnetic flux due to the auxiliary magnet 31 cancel each other out and do not leak to the outside, and the shield cover 3 is made of a soft magnetic material.
Magnetically shielded by 2.
【００１６】このような図１の構成のスピーカにおいて
、ボイスコイル２２に音声信号が供給されると磁気ギャ
ップ３３内の磁束によりボイスコイル２２が振動し振動
板２１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 22, the voice coil 22 vibrates due to the magnetic flux in the magnetic gap 33, causing the diaphragm 21 to vibrate in accordance with the audio signal. A speaker generates sound according to an audio signal.
【００１７】本発明による構成のスピーカは未研磨フェ
ライトの補助磁石３１を磁性粉とバインダーにより接合
することにより安価で効率のよい経済的な低磁気漏洩の
スピーカを提供するものである。The speaker constructed according to the present invention provides an inexpensive, efficient, and economical speaker with low magnetic leakage by bonding the auxiliary magnet 31 of unpolished ferrite with magnetic powder and a binder.
【００１８】[0018]
【発明の効果】以上のように本発明によれば次のような
効果を有する未研磨のフェライト磁石を補助磁石として
用いるとともに未研磨フェライトの補助磁石を磁性粉と
バインダーにより接合することにより効率を低下させる
ことなく安価で効率のよい経済的な低磁気漏洩のスピー
カを高品位で生産可能でありハイビジョンをはじめとす
る映像機器の高細精度化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, efficiency can be improved by using an unpolished ferrite magnet, which has the following effects, as an auxiliary magnet, and by joining the unpolished ferrite auxiliary magnet with magnetic powder and a binder. It is possible to produce low-cost, efficient, and economical low-magnetic leakage speakers with high quality without deterioration, and it is compatible with the high precision of video equipment such as high-definition, and it has great industrial effects. It is.
【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】従来のスピーカの断面図[
Figure 2: Cross-sectional view of a conventional speaker
２１ 振動板 ２２ ボイスコイル ２３ ダンパー ２４ ダンパー ２５ フレーム ２６ センターポール ２７ 上部プレート ２８ 主磁石 ２９ 下部プレート ３０ 接合部 ３１ 補助磁石 ３２ シールドカバー ３３ 磁気ギャップ 21 Diaphragm 22 Voice coil 23 Damper 24 Damper 25 Frame 26 Center pole 27 Upper plate 28 Main magnet 29 Lower plate 30 Joint part 31 Auxiliary magnet 32 Shield cover 33 Magnetic gap
Claims (1)
スコイルと、このボイスコイルを支持するダンパーと、
上記振動板の周縁部を一端で支持するフレームと、セン
ターポールとリング状の上部プレートと下部プレートと
上部プレートと下部プレートに挟まれた主磁石と上記主
磁石と逆極性に着磁され上記下部プレートと粉末磁性材
とバインダーで接合された未研磨の補助磁石とシールド
カバーを備えた磁気回路とよりなるスピーカ。Claim 1: A diaphragm, a voice coil attached to the diaphragm, and a damper that supports the voice coil.
A frame that supports the peripheral edge of the diaphragm at one end, a center pole, a ring-shaped upper plate, a lower plate, a main magnet sandwiched between the upper plate and the lower plate, and a lower part magnetized with a polarity opposite to that of the main magnet. A speaker consisting of a magnetic circuit with a plate, an unpolished auxiliary magnet bonded with powdered magnetic material and a binder, and a shield cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9402691A JPH04324799A (en) | 1991-04-24 | 1991-04-24 | Speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9402691A JPH04324799A (en) | 1991-04-24 | 1991-04-24 | Speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04324799A true JPH04324799A (en) | 1992-11-13 |
Family
ID=14099056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9402691A Pending JPH04324799A (en) | 1991-04-24 | 1991-04-24 | Speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04324799A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9623360B2 (en) | 2013-05-20 | 2017-04-18 | Corning Incorporated | Porous ceramic article and method of manufacturing the same |
| US11229902B2 (en) | 2016-05-31 | 2022-01-25 | Corning Incorporated | Porous article and method of manufacturing the same |
| US11447422B2 (en) | 2017-10-31 | 2022-09-20 | Corning Incorporated | Batch compositions comprising spheroidal pre-reacted inorganic particles and spheroidal pore-formers and methods of manufacture of honeycomb bodies therefrom |
-
1991
- 1991-04-24 JP JP9402691A patent/JPH04324799A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9623360B2 (en) | 2013-05-20 | 2017-04-18 | Corning Incorporated | Porous ceramic article and method of manufacturing the same |
| US11229902B2 (en) | 2016-05-31 | 2022-01-25 | Corning Incorporated | Porous article and method of manufacturing the same |
| US11447422B2 (en) | 2017-10-31 | 2022-09-20 | Corning Incorporated | Batch compositions comprising spheroidal pre-reacted inorganic particles and spheroidal pore-formers and methods of manufacture of honeycomb bodies therefrom |
| US11591265B2 (en) | 2017-10-31 | 2023-02-28 | Corning Incorporated | Batch compositions comprising pre-reacted inorganic particles and methods of manufacture of green bodies therefrom |
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