JPS62231598A - Electrodynamic speaker magnetic circuit - Google Patents
Electrodynamic speaker magnetic circuitInfo
- Publication number
- JPS62231598A JPS62231598A JP61073926A JP7392686A JPS62231598A JP S62231598 A JPS62231598 A JP S62231598A JP 61073926 A JP61073926 A JP 61073926A JP 7392686 A JP7392686 A JP 7392686A JP S62231598 A JPS62231598 A JP S62231598A
- Authority
- JP
- Japan
- Prior art keywords
- pole piece
- magnet
- groove
- magnetic circuit
- adhesive
- 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
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、内磁形磁気回路を有する動電形スピーカの磁
気回路の構成法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of configuring a magnetic circuit of an electrodynamic speaker having an internal magnetic circuit.
（従来の技術） 第３図は従来の内磁形磁気回路の構造を示す図である。(Conventional technology) FIG. 3 is a diagram showing the structure of a conventional internal magnet type magnetic circuit.
従来、内磁形のスピーカ用磁気回路は、ヨーク１の中央
にマグネット２を接着し、マグネット上面にポールピー
ス３を接着する。Conventionally, in an internal magnet type speaker magnetic circuit, a magnet 2 is bonded to the center of a yoke 1, and a pole piece 3 is bonded to the upper surface of the magnet.
ヨーク１とポールピース３は磁気ギャップＧを構成し、
ここにボイスコイル４の線輪４′をヨークとポールピー
スに触れないように配設する。Yoke 1 and pole piece 3 constitute a magnetic gap G,
Here, the wire ring 4' of the voice coil 4 is arranged so as not to touch the yoke and the pole piece.
この時、ボイスコイルは、図中の矢印ａの方向に動くの
で、ボイスコイルの下方のボイスコイル可動範囲にポー
ルピース等より突起があってはならない。At this time, the voice coil moves in the direction of arrow a in the figure, so there must be no protrusion from the pole piece or the like in the voice coil movable range below the voice coil.
（発明が解決しようとする問題点）
近年、音響製品の軽薄短小化に伴い、スピーカの軽量薄
形化要求も強まり、スピーカの磁気回路も、従来のセラ
ミックマグネットによる外磁形の大形磁気回路に対し、
希土類マグネットを使用した内磁形の小形磁気回路を使
用する機会も増えつつある。(Problem to be solved by the invention) In recent years, as acoustic products have become lighter, thinner, and smaller, there has been a growing demand for lighter and thinner speakers. For,
Opportunities to use small internal magnetic circuits using rare earth magnets are also increasing.
マグネットの性能を最大限生かし、かつ、軽量、最薄形
化した磁気回路を考えると、第４図に示すごとく、ポー
ルピースは、マグネットとの接合面においてマグネット
と同一形状が望ましい。In order to maximize the performance of the magnet and to create a lightweight, thinnest magnetic circuit, it is desirable that the pole piece have the same shape as the magnet at the joint surface with the magnet, as shown in FIG.
第４図は、従来の薄形内磁形磁気回路の構造を示す。FIG. 4 shows the structure of a conventional thin internal magnetic circuit.
しかし、従来の内磁形磁気回路では、ポールピースとマ
グネッ１へを接着した時、接着剤がｂのようにポールピ
ースにはみ出し、従来例で述べたように、ボイスコイル
の可動範囲に突起物が出ることになり、スピーカ動作時
の不良を発生しやすい。However, in the conventional internal magnet type magnetic circuit, when the pole piece and the magnet 1 are glued together, the adhesive protrudes onto the pole piece as shown in b, and as described in the conventional example, protrusions are formed in the movable range of the voice coil. This will result in the occurrence of a problem when the speaker is operating.
本発明は、このような軽量、薄形磁気回路を、高品質で
提供することを目的とする。An object of the present invention is to provide such a lightweight, thin magnetic circuit with high quality.
（問題点を解決するための手段）
本発明では、この問題を解決するため、ポールピースと
マグネッ１−の接着に用いた接着剤の逃げを、ポールピ
ースあるいはマグネット、または、その両方に設けた。(Means for solving the problem) In the present invention, in order to solve this problem, an escape hole for the adhesive used to bond the pole piece and the magnet 1- is provided in the pole piece, the magnet, or both. .
つまり、ポールピース、マグネットの外周に沿って、両
者の接着面に凹形の溝を設けたものである。That is, a concave groove is provided along the outer periphery of the pole piece and the magnet on the bonding surface between the two.
（作用）
この溝を設けることにより、溝より内側に塗布された接
着剤は接着面が圧着され、外周が広がっても一旦この溝
に溜り、溝が接着剤で充満されるまで溝より外周にはは
み出さない。(Function) By providing this groove, the adhesive applied inside the groove will be pressed against the adhesive surface, and even if the outer periphery spreads, it will remain in this groove, and will continue to spread from the groove to the outer periphery until the groove is filled with adhesive. It doesn't stick out.
このため、ポールピース外周に接着剤がはみ出しに＜＜
、スピーカ動作不良を低減することができる。For this reason, adhesive may protrude from the outer periphery of the pole piece.
, speaker malfunctions can be reduced.
（実施例） 以下、本発明の実施例について説明する。(Example) Examples of the present invention will be described below.
第１図は本発明の第１の実施例であり、ポールピースに
溝を設けた例を示す。FIG. 1 shows a first embodiment of the present invention, in which a groove is provided in the pole piece.
これは、ヨーク１の中央にマグネット２を接着し、マグ
ネット２の上面には、接着面に凹形の溝５を設けたポー
ルピース３を接着する。６は接着剤である。In this case, a magnet 2 is bonded to the center of a yoke 1, and a pole piece 3 having a concave groove 5 provided on the bonding surface is bonded to the upper surface of the magnet 2. 6 is an adhesive.
この時接着剤は、溝の内側の接着剤塗布面Ｓに塗布され
るので、接着剤は凹形の溝の中に侵入するが、溝５を菖
えてポールピース外周まではみ出すことはない。At this time, the adhesive is applied to the adhesive application surface S inside the groove, so the adhesive enters the concave groove, but does not extend through the groove 5 to the outer periphery of the pole piece.
第２図は本発明の第２の実施例であり、マグネットに溝
を設けた例を示す。FIG. 2 shows a second embodiment of the present invention, and shows an example in which a magnet is provided with grooves.
これは、本発明の第１の実施例がポールピースに溝を設
けたのに対し、本例は、マグネットに溝を設ける構造と
したものである。This is because, while the first embodiment of the present invention provided a groove in the pole piece, this example has a structure in which a groove is provided in the magnet.
これによって、溝より内側に塗布された接着剤は、マグ
ネット外周にはみ出すことはない。This prevents the adhesive applied inside the groove from spilling out onto the outer periphery of the magnet.
（発明の効果）
本発明は、軽量、薄形スピーカ実現に有効な、ポールピ
ースとマグネットの接合面の同一形状化に伴う、ポール
ピース外径への接着剤はみ出しを防ぐために、極めて有
効な方法であり、スピーカの軽量、薄形化への貢献度の
大きいものである。(Effects of the Invention) The present invention is an extremely effective method for preventing adhesive from extruding to the outer diameter of a pole piece due to the same shape of the joint surface between the pole piece and the magnet, which is effective for realizing a lightweight and thin speaker. This greatly contributes to making speakers lighter and thinner.
第１図は本発明の第１の実施例を示す図、第２図は本発
明の第２の実施例を示す図、第３図は従来の内磁形磁気
回路の構造を示す図、第４図は従来の薄形内磁形磁気回
路の構造を示す図である
１ ・・・ ヨーク、２ ・・・マグネット、３ ・・
・ポールピース、４ ・・・ボイスコイル。
４′・・・ボイスコイル線軸、５ ・・・凹形の溝、６
・・・接着剤。
Ｓ・・・接着剤塗布面、Ｇ・・・磁気ギャップ。
特許出願人 松下電器産業株式会社
第１図
ス
第３図
第４図FIG. 1 is a diagram showing a first embodiment of the present invention, FIG. 2 is a diagram showing a second embodiment of the present invention, FIG. 3 is a diagram showing the structure of a conventional internal magnet type magnetic circuit, and FIG. Figure 4 shows the structure of a conventional thin internal magnetic circuit.1... Yoke, 2... Magnet, 3...
・Pole piece, 4...Voice coil. 4'...Voice coil wire shaft, 5...Concave groove, 6
···glue. S: Adhesive applied surface, G: Magnetic gap. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 1 Figure 3 Figure 4
Claims (1)
接合する面がほぼ同じ形状及び寸法をしたポールピース
をマグネットと接合し、ヨークとポールピースで構成し
た磁気ギャップにボイスコイルを配設した動電形スピー
カ磁気回路において、ポールピースのマグネットとの接
合面、あるいは、マグネットのポールピースとの接合面
、または、ポールピースとマグネットの両方の面に、外
周形状にほぼ沿った形で一本あるいは複数本の凹状の溝
を設けたことを特徴とする動電形スピーカ磁気回路。An electrodynamic system in which a magnet is placed in the center of a pot-shaped yoke, the surface to be joined to the magnet is joined to a pole piece with approximately the same shape and dimensions, and a voice coil is placed in the magnetic gap formed by the yoke and pole piece. In a type speaker magnetic circuit, one or more wires are attached to the surface where the pole piece joins the magnet, or the surface where the magnet joins the pole piece, or the surface of both the pole piece and the magnet, approximately following the outer circumferential shape. An electrodynamic speaker magnetic circuit characterized by having a book-shaped concave groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61073926A JPS62231598A (en) | 1986-03-31 | 1986-03-31 | Electrodynamic speaker magnetic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61073926A JPS62231598A (en) | 1986-03-31 | 1986-03-31 | Electrodynamic speaker magnetic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62231598A true JPS62231598A (en) | 1987-10-12 |
Family
ID=13532233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61073926A Pending JPS62231598A (en) | 1986-03-31 | 1986-03-31 | Electrodynamic speaker magnetic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62231598A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008124806A (en) * | 2006-11-13 | 2008-05-29 | Pioneer Electronic Corp | Speaker device |
| EP2369854A1 (en) * | 2002-11-28 | 2011-09-28 | Panasonic Corporation | Loudspeaker |
-
1986
- 1986-03-31 JP JP61073926A patent/JPS62231598A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2369854A1 (en) * | 2002-11-28 | 2011-09-28 | Panasonic Corporation | Loudspeaker |
| JP2008124806A (en) * | 2006-11-13 | 2008-05-29 | Pioneer Electronic Corp | Speaker device |
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