JPH07264694A - Speaker and assembling method for speaker - Google Patents

Speaker and assembling method for speaker

Info

Publication number
JPH07264694A
JPH07264694A JP4729294A JP4729294A JPH07264694A JP H07264694 A JPH07264694 A JP H07264694A JP 4729294 A JP4729294 A JP 4729294A JP 4729294 A JP4729294 A JP 4729294A JP H07264694 A JPH07264694 A JP H07264694A
Authority
JP
Japan
Prior art keywords
magnetic circuit
speaker
gap
magnetic
magnet
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
Application number
JP4729294A
Other languages
Japanese (ja)
Inventor
Masao Fujihira
正男 藤平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP4729294A priority Critical patent/JPH07264694A/en
Publication of JPH07264694A publication Critical patent/JPH07264694A/en
Pending legal-status Critical Current

Links

Landscapes

  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

PURPOSE:To reduce the height of a magnetic circuit and to make the whole part of the speaker compact by using a center pole or yoke composing a 2nd magnetic circuit also for a shield cover. CONSTITUTION:A magnetic-proof shield cover 9 is used for the lower plate comprising the 2nd magnetic circuit 26. It is also used for a center pole member 9A. After a 1st magnetic circuit 25 having a cylinder part 6A is assembled on a yoke 6, a gap gage is engaged with the center pole member 9A which is integrally formed by the shield cover 9 as a 2nd magnetic circuit 26. The gap gage is inserted into the inner diameter of the cylinder part 6A of the 1st magnetic circuit 25 to integrally form the 1st and the 2nd magnetic circuits 25 and 26. By only assembling the 1st and the 2nd gaps 10 and 11, the speaker assembling method not requiring the shield cover assembly process can be obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は同軸型の２ウエイスピー
カに用いて好適なスピーカ及びスピーカの組立方法に係
わり、特に小型化可能なスピーカを得ると共に組立が簡
単なスピーカの組立方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker suitable for use in a coaxial two-way speaker and a method for assembling the speaker, and more particularly to a method for assembling a speaker which is compact and easy to assemble.

【０００２】[0002]

【従来の技術】従来から低中音用スピーカ及び高音用ス
ピーカを同軸型と成したスピーカとして、実開昭５９−
１０４６９４号公報に開示されている様な２ウエイスピ
ーカが知られている。このスピーカは低音用スピーカの
磁気回路（以下第１の磁気回路と記す）に用いられてい
る第１の磁石とキャンセル用の磁石とを用いてスピーカ
等からの漏洩磁束を減少させる構成と成されている。2. Description of the Related Art Conventionally, as a speaker in which a speaker for low and middle tones and a speaker for high tones are coaxial type, an actual open speaker 59-
A two-way speaker as disclosed in Japanese Patent No. 104694 is known. This speaker is configured to reduce leakage magnetic flux from a speaker or the like by using a first magnet and a canceling magnet used in a magnetic circuit of a bass speaker (hereinafter referred to as a first magnetic circuit). ing.

【０００３】この公報に開示された２ウエイスピーカの
構成を図７について簡単に説明する。図で、１は全体と
して低中音用及び高音用の２ウエイスピーカを示し、２
は下プレートであり、板材で略々円盤状に形成されてい
る。８は第２の磁石でフェライト等でリング状に形成さ
れ、この第２の磁石８の上面には円筒部６Ａ及びフラン
ジ部６Ｂを有する有底円筒状のヨーク６のフランジ部６
Ｂを載置させる。このヨーク６の円筒部６Ａの一方は塞
がれた底部（上端部）６Ｃとなされ、この底部６Ｃの中
心には中心孔６Ｄが穿たれている。円筒部６Ａの他方は
外方に延設された環状のフランジ部６Ｂと成され、この
フランジ部６Ｂの上面が第２の磁石と略々同一構造の第
１の磁石３の底面と接し、フランジ部６Ｂの下面が第２
の磁石８の上面と接している。この第２の磁石は下プレ
ート２上に載置される様に配設されている。更に下プレ
ート２の中心位置に植立したセンタポール７はヨーク６
の底部６Ｃに穿った中心孔６Ｄ中に所定の空隙を介して
挿通されている。更に中心孔５を有する純鉄等で構成し
た上プレート４が第１の磁石３の上面に固着されてい
る。The structure of the two-way speaker disclosed in this publication will be briefly described with reference to FIG. In the figure, reference numeral 1 indicates a two-way speaker for low-midrange and high-range sounds as a whole.
Is a lower plate, which is formed of a plate material into a substantially disc shape. A second magnet 8 is formed of ferrite or the like in a ring shape, and the flange portion 6 of the bottomed cylindrical yoke 6 having a cylindrical portion 6A and a flange portion 6B on the upper surface of the second magnet 8.
Place B. One of the cylindrical portions 6A of the yoke 6 is a closed bottom portion (upper end portion) 6C, and a center hole 6D is formed at the center of the bottom portion 6C. The other end of the cylindrical portion 6A is formed as an annular flange portion 6B extending outward, and the upper surface of the flange portion 6B contacts the bottom surface of the first magnet 3 having substantially the same structure as the second magnet. The lower surface of the portion 6B is the second
Is in contact with the upper surface of the magnet 8. The second magnet is arranged so as to be placed on the lower plate 2. Further, the center pole 7 that is planted at the center of the lower plate 2 is a yoke 6
It is inserted through a predetermined space in a center hole 6D formed in the bottom portion 6C. Further, an upper plate 4 made of pure iron or the like having a central hole 5 is fixed to the upper surface of the first magnet 3.

【０００４】従って、ヨーク６の円筒部６Ａの外周と上
プレート４並びに第１の磁石によって第１の磁気回路が
構成され、フランジ部６Ｂを有する有底円筒状のヨーク
６と下プレート２及びセンタポール７並びに第２の磁石
８で第２の磁気回路が構成されることになる。尚９は第
１及び第２の磁気回路を一体化するための円筒状のケー
シングで、防磁用のシールドカバーとして機能させてい
る。又、リング状に形成された第１及び第２の磁石３及
び８は上下にＮ，Ｓ及びＳ，Ｎと反対になる様に着磁さ
せることで、第１の磁石の磁束がシールドカバー９の円
周部を介して漏洩することを回避する様に成されてい
る。Therefore, the outer periphery of the cylindrical portion 6A of the yoke 6, the upper plate 4 and the first magnet constitute a first magnetic circuit, and the bottomed cylindrical yoke 6 having the flange portion 6B, the lower plate 2 and the center. The pole 7 and the second magnet 8 constitute a second magnetic circuit. Reference numeral 9 is a cylindrical casing for integrating the first and second magnetic circuits, which functions as a magnetic shield shield cover. Further, the first and second magnets 3 and 8 formed in a ring shape are vertically magnetized so as to be opposite to N, S and S, N, so that the magnetic flux of the first magnet is shielded. Is designed to avoid leakage through the circumference of the.

【０００５】これら第１の磁気回路を構成する第１のギ
ャップ１０及び第２の磁気回路を構成する第２のギャッ
プ１１には夫々低中音用ボイスコイル１２及び高音用ボ
イスコイル１３が上下方向に可動自在にダンパ１４及び
１５でフレーム１６及び１７に保持され、フレーム１６
及び１７と低中音用ボイスコイル１２及び高音用ボイス
コイル１３間には低中音用コーン１８及び高音用コーン
１９を配設して同軸型２ウエイスピーカが構成される。In the first gap 10 forming the first magnetic circuit and in the second gap 11 forming the second magnetic circuit, a low-mid tone voice coil 12 and a high-pitched voice coil 13 are vertically arranged. Movably held by the dampers 14 and 15 on the frames 16 and 17,
A low-midtone cone 18 and a high-tone cone 19 are arranged between the low-midtone voice coil 12 and the high-tone voice coil 13 to form a coaxial two-way speaker.

【０００６】[0006]

【発明が解決しようとする課題】上述の従来構成で説明
した同軸型の２ウエイスピーカの構成では第１及び第２
の磁気回路を構成する場合に第１のリング状の磁石３の
下端にヨーク６のフランジ部６Ｂを配設し、更に、同じ
くリング状の第２の磁石８をフランジ部６Ｂの下端に下
プレート２を介して重ねると共にケーシング用のシール
ドカバー９で第１及び第２の磁気回路からの漏洩磁束を
遮蔽させなければならなかった。従って、これら第１及
び第２の磁気回路を囲繞するシールドカバー５の高さＨ
が本発明に比べて少なくとも下プレート２の厚み分だけ
高くなり、スピーカ全体が大型化する問題があった。In the configuration of the coaxial type two-way speaker described in the above-mentioned conventional configuration, the first and second configurations are used.
In the case of configuring the magnetic circuit of FIG. 1, the flange portion 6B of the yoke 6 is arranged at the lower end of the first ring-shaped magnet 3, and the ring-shaped second magnet 8 is also formed at the lower end of the flange portion 6B. It was necessary to overlap the two vias 2 and to shield the leakage magnetic flux from the first and second magnetic circuits with the shield cover 9 for the casing. Therefore, the height H of the shield cover 5 surrounding the first and second magnetic circuits is
However, there is a problem that the speaker is increased in size by at least the thickness of the lower plate 2 as compared with the present invention, and the entire speaker is enlarged.

【０００７】又、第２の磁気回路を構成するヨーク６は
フランジ部６Ｂを有する有底円筒状と成さねばならず底
部６Ｃに中心孔６Ｄの加工を行わなくてはならない等で
構造が複雑となる問題があった。Further, the yoke 6 constituting the second magnetic circuit must be formed into a bottomed cylindrical shape having a flange portion 6B, and the center hole 6D must be formed in the bottom portion 6C, so that the structure is complicated. There was a problem that became.

【０００８】更にスピーカの組立工程に於いても、第１
及び第２の磁気回路を組み上げた後にケーシングとして
のシールドカバー９を第１及び第２の磁気回路を囲繞す
る様に固定させる工程を必要とする等の問題があった。Further, in the speaker assembling process, the first
There is a problem that a step of fixing the shield cover 9 as the casing so as to surround the first and second magnetic circuits after assembling the first and second magnetic circuits is required.

【０００９】本発明は叙上の問題点を解消したスピーカ
及びスピーカの組立方法を提供するものであり、本発明
の目的は第２の磁気回路を構成するセンタポールをケー
シング用のシールドカバーと兼用させて簡単な構成と成
して磁気回路高さＨを小さくし、全体として小型化した
同軸型２ウエイスピーカを提供するにある。The present invention provides a speaker and a method of assembling the speaker that solve the above problems. An object of the present invention is to use the center pole forming the second magnetic circuit as a shield cover for a casing. Thus, the height H of the magnetic circuit is reduced by a simple structure to provide a coaxial two-way speaker that is downsized as a whole.

【００１０】本発明の他の目的は磁気回路の組立が簡単
でケーシングとなるシールドカバー９の取付工程を省く
ことが出来る様に成されたスピーカの組立方法を提供す
るにある。Another object of the present invention is to provide a method of assembling a loudspeaker that is simple in assembling a magnetic circuit and that can omit the step of attaching the shield cover 9 that serves as a casing.

【００１１】[0011]

【課題を解決するための手段】本発明のスピーカはその
例が図１及び図５に示されている様に、第１の磁気回路
２５に設けた第１の磁石３に対し、第２の磁気回路２６
に設けたキャンセル用の第２の磁石８によって漏洩磁束
を減少させる様に成したスピーカ１に於いて、第２の磁
気回路２６のギャップ１１を構成する部分９Ａを防磁用
のシールドカバー９と一体に構成させて成るものであ
る。As shown in FIGS. 1 and 5, the speaker of the present invention has a second magnet for the first magnet 3 provided in the first magnetic circuit 25. Magnetic circuit 26
In the speaker 1 configured to reduce the leakage magnetic flux by the second canceling magnet 8 provided in the above, the portion 9A forming the gap 11 of the second magnetic circuit 26 is integrated with the magnetic shield cover 9. It is made up of.

【００１２】本発明の第１のスピーカの組立方法はその
例が図２に示されている様に、メインの第１の磁石３と
円筒部６Ａを有するヨーク６並びに上プレート４で構成
された第１のギャップ１０を有する第１の磁気回路２５
を組み立てる工程と、防磁用のシールドカバー９に第２
のギャップ１１と対応するセンタポール部材９Ａを形成
し、キャンセル用の第２の磁石８をシールドカバー９上
に配設して第２の磁気回路２６を組み立てる工程と、第
２のギャップ１１と対応するセンタポール部材９Ａにギ
ャップゲージ２８を嵌着させ、第１の磁気回路２５の円
筒部６Ａに挿入させて第１及び第２の磁気回路２５及び
２６を組み立ててなるものである。As shown in FIG. 2, the first speaker assembling method of the present invention comprises a main first magnet 3, a yoke 6 having a cylindrical portion 6A, and an upper plate 4. First magnetic circuit 25 having a first gap 10
The process of assembling the
Of the center pole member 9A corresponding to the gap 11 of FIG. 2 and disposing the second canceling magnet 8 on the shield cover 9 to assemble the second magnetic circuit 26, and the second gap 11 The gap gauge 28 is fitted to the center pole member 9A, and is inserted into the cylindrical portion 6A of the first magnetic circuit 25 to assemble the first and second magnetic circuits 25 and 26.

【００１３】本発明の第２のスピーカの組立方法はその
例が図６に示されている様に、メインの第１の磁石３と
円筒部６Ａ′を設けたヨーク６′並びに上プレート４で
構成された第１のギャップ１０を有する第１の磁気回路
２５を組み立てる工程と、防磁用のシールドカバー９に
第２のギャップ１１と対向するセンタポール部分９Ａ，
９Ａ′又は底面部９Ｃに穿った透孔９Ｂ，９Ｂ′又は９
Ｂ″を形成し、キャンセル用の第２の磁石８をシールド
カバー９上に配設して第２の磁気回路２６を組み立てる
工程と、第１の磁気回路２５の円筒部材６Ａ′にギャッ
プゲージ３２を嵌着させ第２の磁気回路２６のセンタポ
ール部分、又は底面部に穿った透孔９Ｂ，９Ｂ′又は９
Ｂ″をギャップゲージ３２の外周部に挿通させて第１及
び第２の磁気回路２５又は２６を組み立ててなるもので
ある。As shown in FIG. 6, the second speaker assembling method of the present invention includes a main first magnet 3 and a yoke 6'provided with a cylindrical portion 6A 'and an upper plate 4. A step of assembling the first magnetic circuit 25 having the configured first gap 10, and a center pole portion 9A facing the second gap 11 on the shield cover 9 for magnetic shielding,
9A 'or through holes 9B, 9B' or 9 formed in the bottom surface 9C
B ″ is formed, the second canceling magnet 8 is disposed on the shield cover 9 to assemble the second magnetic circuit 26, and the gap gauge 32 is attached to the cylindrical member 6A ′ of the first magnetic circuit 25. Through hole 9B, 9B 'or 9 formed in the center pole portion or the bottom surface portion of the second magnetic circuit 26
B ″ is inserted into the outer peripheral portion of the gap gauge 32 to assemble the first and second magnetic circuits 25 or 26.

【００１４】[0014]

【作用】本発明は第２の磁気回路２６を構成させる下プ
レートを防磁用のシールドカバー９で兼用すると共にセ
ンタポール部材９Ａも同じシールドカバー９で兼用させ
る様に成したので、防磁用の同軸型２ウエイスピーカを
小型に構成可能となる。According to the present invention, since the lower plate constituting the second magnetic circuit 26 is also used as the magnetic shield shield 9 and the center pole member 9A is also used as the same shield cover 9, the magnetic shield coaxial is used. The type 2 way speaker can be made compact.

【００１５】本発明はヨーク６に円筒部６Ａを有する第
１の磁気回路２５を組み立てた後に第２の磁気回路２６
としてシールドカバー９で一体形成したセンタポール部
材９Ａにギャップゲージ２８を嵌着させて、該ギャップ
ゲージ２８を第１の磁気回路２５の円筒部６Ａの内径内
に挿入して第１及び第２の磁気回路２５及び２６を一体
化する様に成したので第１及び第２のギャップ１０及び
１１を形成する様に組み立てるだけでシールドカバー組
立工程を必要としないスピーカの組立方法が得られる。According to the present invention, the second magnetic circuit 26 is formed after the first magnetic circuit 25 having the cylindrical portion 6A is assembled to the yoke 6.
As a result, the gap gauge 28 is fitted to the center pole member 9A integrally formed with the shield cover 9, and the gap gauge 28 is inserted into the inner diameter of the cylindrical portion 6A of the first magnetic circuit 25, so that the first and second Since the magnetic circuits 25 and 26 are integrally formed, the speaker assembling method can be obtained by only assembling to form the first and second gaps 10 and 11 and not requiring the shield cover assembling step.

【００１６】本発明はヨーク６の下方に突出する円筒部
６Ａ′及びメインの第１の磁石３を有する第１の磁気回
路２５を組み立てた後に該円筒部６Ａ′の下方突出部に
ギャップゲージ３２を嵌着させ、キャンセル用の第２の
磁石９を載置したシールドカバー９と一体形成したセン
タポール部材９Ａ又は底面部９Ｃに穿ったの透孔９Ｂ，
９Ｂ′又は９Ｂ″をギャップゲージ３２の外径に嵌合さ
せて第１及び第２の磁気回路２５及び２６を一体化させ
る様に成したので第１及び第２のギャップ１０及び１１
を形成する様に組み立てるだけでシールドカバーの組み
立てが必要でないスピーカの組立方法が得られる。According to the present invention, after assembling the first magnetic circuit 25 having the cylindrical portion 6A 'protruding downward of the yoke 6 and the main first magnet 3, the gap gauge 32 is provided on the downward protruding portion of the cylindrical portion 6A'. And a through hole 9B formed in the center pole member 9A or the bottom surface portion 9C integrally formed with the shield cover 9 on which the second canceling magnet 9 is placed,
9B ′ or 9B ″ is fitted to the outer diameter of the gap gauge 32 to integrate the first and second magnetic circuits 25 and 26, so that the first and second gaps 10 and 11 are formed.
A speaker assembling method that does not require the assembling of the shield cover can be obtained only by assembling so as to form the speaker.

【００１７】[0017]

【実施例】以下、本発明のスピーカ及びスピーカの組立
方法を図１乃至図４を用いて説明する。尚、本例では低
中音用スピーカ及び高音用スピーカを同軸的に同時構成
した防磁型２ウエイスピーカについて詳述する。又図７
で示した同軸型２ウエイスピーカとの対応部分には同一
符号を付して示してある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A speaker and a method for assembling the speaker according to the present invention will be described below with reference to FIGS. In this example, a magnetically shielded two-way speaker in which a low-midrange speaker and a high-tone speaker are coaxially simultaneously configured will be described in detail. See also FIG.
The parts corresponding to those of the coaxial type two-way speaker shown by are given the same reference numerals.

【００１８】図１は本例の２ウエイスピーカの平面から
みて開口部の中心部を通る直径方向に沿って切断した側
断面図であり、図２はこのスピーカに用いる磁気回路の
組立説明図、図３は本例の高音用スピーカに用いるホー
ンスロートの構成図、図４は第１及び第２の磁気回路部
分を拡大した一部側断面図で、本例の磁気回路の他の構
成を示すものである。先ず全体的なスピーカの構成を説
明する前に図２によって主に磁気回路の組立工程を説明
する。FIG. 1 is a side sectional view taken along the diameter direction passing through the center of the opening when viewed from the plane of the two-way speaker of this example, and FIG. 2 is an assembly explanatory view of a magnetic circuit used in this speaker, FIG. 3 is a configuration diagram of a horn throat used for the high-frequency speaker of this example, and FIG. 4 is an enlarged partial side sectional view of the first and second magnetic circuit portions, showing another configuration of the magnetic circuit of this example. It is a thing. First, before explaining the overall structure of the speaker, the process of assembling the magnetic circuit will be mainly described with reference to FIG.

【００１９】図２Ａはメインとなる低中音用スピーカを
構成するための第１の磁気回路２５の組立状態を示して
いる。図２Ａで６はヨークであり、純鉄等の板材を円盤
状に形成したフランジ部６Ｂとその中心部に穿った透孔
の周辺に側断面がＬ字状となる様になされたセンタポー
ルヨーク即ち、円筒部６Ａが植立されている。このヨー
ク６のフランジ部６Ｂの上側にフェライト等の磁石材料
でリング状に空間部３Ａを形成した着磁されていない第
１の磁石３を接着剤３４を介して固定する。FIG. 2A shows an assembled state of the first magnetic circuit 25 for constituting the main speaker for low and medium sounds. In FIG. 2A, reference numeral 6 is a yoke, which is a center pole yoke having an L-shaped side cross section around a flange portion 6B formed of a disc material of a plate material such as pure iron and a through hole formed in the center portion thereof. That is, the cylindrical portion 6A is planted. An unmagnetized first magnet 3 having a ring-shaped space 3A made of a magnetic material such as ferrite is fixed to the upper side of the flange 6B of the yoke 6 with an adhesive 34.

【００２０】次に所定の金属で作製された第１のギャッ
プゲージ２７を用意する。この第１のギャップゲージ２
７は上部に把持部２７Ａが設けられ、下面にヨーク６の
円筒部６Ａの外径と嵌合する様に成された凹部２７Ｄを
設けた円筒部挟持用ゲージ２７Ｂが形成され、このゲー
ジ２７Ｂの挟持幅Ｗが第１の磁気回路２５のボイスコイ
ル１２のギャップ幅を定めている。Next, a first gap gauge 27 made of a predetermined metal is prepared. This first gap gauge 2
7, a grip portion 27A is provided on the upper portion, and a cylindrical portion holding gauge 27B is formed on the lower surface, which is provided with a concave portion 27D configured to fit with the outer diameter of the cylindrical portion 6A of the yoke 6. The sandwiching width W defines the gap width of the voice coil 12 of the first magnetic circuit 25.

【００２１】この挟持用ゲージ２７Ｂの外周部は純鉄等
の板材で円盤状に形成した上プレート４の中心に穿った
中心孔５と嵌合する様に成され、且つ、第１のギャップ
ゲージ２７の中心には上面から凹部２７Ｄの外周に分岐
して貫通する透孔２７Ｃが穿たれ、この透孔２７Ｃを介
して被吸着物である本例では第１の磁石３とヨーク６を
真空吸着装置等によりゲージ部２７Ｂ内に吸着保持する
様になされている。An outer peripheral portion of the clamping gauge 27B is formed so as to fit with a central hole 5 formed at the center of an upper plate 4 formed in a disk shape with a plate material such as pure iron, and a first gap gauge. In the center of 27, a through hole 27C is formed so as to branch from the upper surface to the outer periphery of the recess 27D and penetrates through the through hole 27C. In the present example, which is an object to be attracted, the first magnet 3 and the yoke 6 are vacuum attracted. It is adapted to be sucked and held in the gauge portion 27B by a device or the like.

【００２２】この上プレート４の中心孔５を第１のギャ
ップゲージ２７の挟持用ゲージ２７Ｂの外径部に嵌合保
持させて、第１の磁石３の上面に上プレート４の下面を
接着剤３４を介して固定する。尚、上プレート４の上面
には予め漏斗状の金属より成るフレーム１６を固定させ
て置くを可とする。The center hole 5 of the upper plate 4 is fitted and held in the outer diameter portion of the sandwiching gauge 27B of the first gap gauge 27, and the lower surface of the upper plate 4 is bonded to the upper surface of the first magnet 3 by an adhesive. Fix through 34. A frame 16 made of a funnel-shaped metal can be fixed and placed on the upper surface of the upper plate 4 in advance.

【００２３】上プレート４と第１の磁石３とが乾燥後完
全に固着されたならば第１のギャップゲージ２７を図２
Ｂの様に矢印Ｕ方向に抜き取る。次に第１の磁石３の上
側をＮ極、下側がＳ極となる様に着磁を行うことで第１
のギャップ１０が形成された第１の磁気回路２５が図２
Ｂの様に組み立てられる。この第１の磁気回路２５は低
中音用スピーカの磁気回路２５を構成する。When the upper plate 4 and the first magnet 3 are completely fixed after drying, the first gap gauge 27 is replaced with the one shown in FIG.
Like B, pull out in the direction of arrow U. Next, the first magnet 3 is magnetized so that the upper side has the N pole and the lower side has the S pole.
The first magnetic circuit 25 in which the gap 10 of FIG.
It is assembled like B. The first magnetic circuit 25 constitutes the magnetic circuit 25 of the speaker for low and middle tones.

【００２４】次に上記工程とは別に高音用スピーカの第
２の磁気回路２６を構成するために防磁用のケーシング
であるシールドカバーを用意する。このシールドカバー
９は有底円筒と成され、その底面部９Ｃの中心軸近傍に
は高音用スピーカのセンタポール兼用ヨークとなるセン
タポール部材９Ａを形成する。Next, in addition to the above steps, a shield cover, which is a casing for magnetic shielding, is prepared in order to form the second magnetic circuit 26 of the high frequency speaker. The shield cover 9 is formed as a bottomed cylinder, and a center pole member 9A serving as a center pole yoke of a high frequency speaker is formed near the center axis of the bottom surface 9C.

【００２５】このセンタポール部材９Ａはケーシングと
なる円筒形状部内に底面部９Ｃから凸状に突出させた有
底円筒形状と成され、その底面部９Ｄの中心には透孔９
Ｅが穿たれている。図２Ｃのセンタポール部材９Ａは段
部９Ｆ上に形成されているが、図４に示す様に底面部９
Ｃから直接立ち上げる様にしてもよい。この段部９Ｆは
後述するも高音用スピーカのボイスコイルに接続される
錦糸線の引出し用ラグ端子を取り付ける様に成される部
分である。The center pole member 9A has a bottomed cylindrical shape in which a convex shape is projected from a bottom surface portion 9C in a cylindrical portion serving as a casing, and a through hole 9 is formed at the center of the bottom surface portion 9D.
E is worn. The center pole member 9A of FIG. 2C is formed on the stepped portion 9F, but as shown in FIG.
You may make it start up directly from C. As will be described later, the stepped portion 9F is a portion to which a lug terminal for pulling out a tinsel wire connected to a voice coil of a high frequency speaker is attached.

【００２６】この様な有底円筒形状のシールドカバー９
内に防磁用のキャンセル磁石となる第２の磁石８を有底
円筒内に挿入して底面部９Ｃの上面に接着剤３４等で貼
着する。この第２の磁石は第１の磁石３と略々同一構成
でリング状にフェライト等で構成されるがその大きさは
キャンセル効果が最も大きくなる様に選択することが望
ましい。又、その着磁方向は第１の磁石３とは異なり、
上側がＳ極、下側がＮ極と成る様に着磁されている。Such a bottomed cylindrical shield cover 9
The second magnet 8 serving as a canceling magnet for magnetic field protection is inserted into the bottomed cylinder and attached to the upper surface of the bottom surface portion 9C with the adhesive 34 or the like. The second magnet has substantially the same structure as the first magnet 3 and is made of ferrite or the like in a ring shape, but it is desirable to select the size thereof so that the canceling effect is maximized. Also, the magnetization direction is different from that of the first magnet 3,
It is magnetized so that the upper side is the S pole and the lower side is the N pole.

【００２７】次に高音用スピーカの第２の磁気回路２６
のギャップ１１を構成するために第２のギャップゲージ
を用意する。この第２のギャップゲージ２８は上記した
第１のギャップゲージ２７と略々同一構成と成され、図
２Ｃに示す様に上部に把持部２８Ａが設けられ、下面に
センタポール部材９Ａと嵌合する様に成された凹部２８
Ｄを設けたセンタポール部材把持用ゲージ部２８Ｂが形
成され、このゲージ部２８Ｂの把持幅Ｗ1 が第２の磁気
回路２６のボイスコイルの挿入されるギャップ幅を定め
ている。Next, the second magnetic circuit 26 of the treble speaker.
A second gap gauge is prepared to form the gap 11 of FIG. The second gap gauge 28 has substantially the same structure as the first gap gauge 27 described above, and has a grip portion 28A provided on the upper portion and fitted with the center pole member 9A on the lower surface as shown in FIG. 2C. Recess 28 formed in the same manner
A center pole member gripping gauge portion 28B provided with D is formed, and a gripping width W 1 of the gauge portion 28B defines a gap width into which the voice coil of the second magnetic circuit 26 is inserted.

【００２８】この把持用ゲージ部２８Ｂの外周部はヨー
ク６の円筒部６Ａの内径と嵌合する様に成され、且つ第
２のギャップゲージ２８の中心には上面から凹部２８Ｄ
に分岐して貫通する透孔２８Ｃが穿たれ、この透孔２８
Ｃを介して被吸着物である第２の磁気回路２６を構成す
る第２の磁石８の固定されたシールドカバー９をゲージ
２７Ｂ内の凹部２８Ｄ内に図２Ｃの様に真空吸着装置等
で吸着保持させる。An outer peripheral portion of the grip gauge portion 28B is formed so as to fit with an inner diameter of the cylindrical portion 6A of the yoke 6, and a concave portion 28D is formed in the center of the second gap gauge 28 from the upper surface.
A through hole 28C that is branched and penetrates into the
The shield cover 9 to which the second magnet 8 constituting the second magnetic circuit 26, which is the object to be attracted, is fixed to the concave portion 28D in the gauge 27B by means of a vacuum adsorption device or the like via C as shown in FIG. 2C. Hold it.

【００２９】この様に第２の磁気回路２６を持ち上げて
ギャップゲージ２８を第１の磁気回路２５のヨーク６の
円筒部６Ａの中心孔６Ｄに挿入するか、第１の磁気回路
２５のヨーク６の中心孔６Ｄをギャップゲージ２８の外
周に沿って矢印Ｄの様に降下させる。In this way, the second magnetic circuit 26 is lifted and the gap gauge 28 is inserted into the center hole 6D of the cylindrical portion 6A of the yoke 6 of the first magnetic circuit 25, or the yoke 6 of the first magnetic circuit 25 is inserted. The center hole 6D is lowered along the outer circumference of the gap gauge 28 as indicated by arrow D.

【００３０】この際第１の磁気回路２５の第１の磁石３
と第２の磁気回路２６の第２の磁石８が互いに反撥する
が、この反撥力に抗して、接着剤３４を介してヨーク６
のフランジ部６Ｂの底面と第２の磁石８の上面とを完全
に接合させて反撥力より機械的に接着強度が高くなる様
に固着させることで、第１の主磁気回路と第２のキャン
セル磁気回路が結合され、シールドカバー９からの漏洩
磁束を減少させる。At this time, the first magnet 3 of the first magnetic circuit 25
The second magnet 8 of the second magnetic circuit 26 repels each other, and the yoke 6 is resisted by the repelling force via the adhesive 34.
The bottom surface of the flange portion 6B and the top surface of the second magnet 8 are completely joined to each other and fixed so that the adhesive strength is mechanically higher than the repulsive force, so that the first main magnetic circuit and the second cancel circuit are formed. The magnetic circuit is coupled to reduce the leakage magnetic flux from the shield cover 9.

【００３１】第１の磁気回路２５と第２の磁気回路２６
とが完全に固着されたならば第２のギャップゲージ２８
を図２Ｄの様に矢印Ｕ1 方向に上動させて抜き取ること
で、高音用スピーカの第２の磁気回路２６のギャップ１
１が形成される。即ち、センタポール部材９Ａの外径
と、ヨーク６の円筒部６Ａの中心孔６Ｄの内径間に形成
されたリング状の空隙部が第２の磁気回路２６の高音用
スピーカのボイスコイルが挿入されるギャップ１１と成
される。First magnetic circuit 25 and second magnetic circuit 26
If and are completely fixed, the second gap gauge 28
The By extracting by upward in the arrow U 1 direction as in FIG. 2D, the gap of the second magnetic circuit 26 of the tweeter 1
1 is formed. That is, the ring-shaped void formed between the outer diameter of the center pole member 9A and the inner diameter of the center hole 6D of the cylindrical portion 6A of the yoke 6 is inserted into the voice coil of the high-frequency speaker of the second magnetic circuit 26. Gap 11 is formed.

【００３２】又、図２Ｄに示す段階で上プレート４の上
面に鋼材等で漏斗状に形成されたフレーム１６を固定す
る様にしてもよい。この様にして磁気回路の金物部品の
組立工程が終了する。Further, at the stage shown in FIG. 2D, a funnel-shaped frame 16 made of steel or the like may be fixed to the upper surface of the upper plate 4. In this way, the assembly process of the metal parts of the magnetic circuit is completed.

【００３３】次にこれら第１及び第２の磁気回路の組立
が終わると、低中音用スピーカ及び高音用スピーカを組
み立てる工程に入る。先ず第１の磁気回路２５の低中音
用スピーカを構成させるために第１のギャップ１０内に
図１に示す様に円筒状のボビンにコイルが巻回された第
１のボイスコイル１２をボイスコイルスペーサ（図示せ
ず）と共に挿通して、第１のボイスコイル１２の外径と
フレーム１６又は上プレート４間に第１のダンパー１４
を介して第１のボイスコイル１２を保持する。Next, when the assembling of the first and second magnetic circuits is completed, a process for assembling the low and middle tone speaker and the high tone speaker is started. First, as shown in FIG. 1, a first voice coil 12 in which a coil is wound around a cylindrical bobbin in the first gap 10 to construct a speaker for low and medium sounds of the first magnetic circuit 25 is voiced. The first damper 14 is inserted between the outer diameter of the first voice coil 12 and the frame 16 or the upper plate 4 by being inserted together with a coil spacer (not shown).
The first voice coil 12 is held via.

【００３４】次にボイスコイル１２のコイルの一端から
引き出した錦糸線３７の一端をフレーム１６に絶縁して
取り付けたラグ端子３５に接続する。Next, one end of a tinsel wire 37 drawn out from one end of the voice coil 12 is connected to a lug terminal 35 which is insulated and attached to the frame 16.

【００３５】次に紙等から成るエッジ２１の付いた漏斗
状の低中音用のコーン１８の中心透孔を第１のボイスコ
イル１２の上端部に接合し、低中音用のコーン１８の最
大直径部をフレーム１６の上部開口周辺部に矢紙２３を
介して固定することで低中音用スピーカが組み立てられ
る。この様に第１のダンパー１４及び第１のコーン１８
が完全に固定された階段でボイスコイルスペーサを抜き
取ることで第１のボイスコイル１２は第１のギャップ１
０内で上下に揺動可能に保持される。Next, the center through-hole of the funnel-shaped cone 18 for low and medium sounds having an edge 21 made of paper or the like is joined to the upper end portion of the first voice coil 12, and the cone 18 for low and middle sounds is formed. By fixing the maximum diameter portion to the peripheral portion of the upper opening of the frame 16 via the arrow paper 23, the speaker for low and middle tones is assembled. In this way, the first damper 14 and the first cone 18
By removing the voice coil spacer at the stairs where the first voice coil 12 is completely fixed.
It is held swingable up and down within 0.

【００３６】次に高音用のスピーカを組み立てるために
高音用の円筒状のボビンにコイルが巻回された第２のボ
イスコイル１３をボイスコイルスペーサ（図示せず）と
共に第２の磁気回路２６の第２のギャップ１１内に挿入
する。Next, in order to assemble a high-pitched speaker, a second voice coil 13 in which a coil is wound around a high-pitched cylindrical bobbin is provided with a voice coil spacer (not shown) in the second magnetic circuit 26. It is inserted in the second gap 11.

【００３７】次に第２のボイスコイル１３の内径とセン
タポール部材９Ａの上面間に第２のダンパー１５を介在
させ接着固定して、第２のボイスコイル１３を第２のギ
ャップ１１内に保持させて、乾燥後にボイスコイルスペ
ーサを抜き取る。ここで必要に応じて、磁束密度を高め
るためにギャップ１１内に磁性流体３４を介在させる。Next, the second damper 15 is adhered and fixed between the inner diameter of the second voice coil 13 and the upper surface of the center pole member 9A, and the second voice coil 13 is held in the second gap 11. Then, after drying, the voice coil spacer is pulled out. Here, if necessary, a magnetic fluid 34 is interposed in the gap 11 to increase the magnetic flux density.

【００３８】次にボイスコイル１３のコイルの一端に接
続した錦糸線３８の他端をセンタポール部材９Ａの底部
９Ｄに穿った透孔９Ｅに通して、段部９Ｆに絶縁して配
設したラグ端子３６に接続する。Next, the other end of the tinsel wire 38 connected to one end of the coil of the voice coil 13 is passed through the through hole 9E formed in the bottom portion 9D of the center pole member 9A and is insulated from the step portion 9F. Connect to terminal 36.

【００３９】次にチタン、ベリリウム等のドーム状に形
成した高音用のドームコーン１９を第２のボイスコイル
１３の上端部に貼着する。この様に比較的、下方向に配
設される高音用スピーカの放音効率を高めるためにドー
ムコーン１９の開口部前面にホーンスロート３３を配設
する。この様なホーンスロート３３の構成を図３Ａ及び
Ｂに示す。図３Ａは一部を断面とする側面図、図３Ｂは
底面図である。このホーンスロート３３は上面にフラン
ジ３３Ａを有し、下面にボイスコイル１３の内径より小
さな小径部Ｄ1 を有する段部３３Ｂが形成された円柱部
材で、底面にはドームコーン１９の曲率に合せた曲率Ｒ
を有する座ぐり孔３３Ｃを有し、この座ぐり孔３３Ｃか
らフランジ３３Ａ方向に拡がる様に放射状の放音孔３３
Ｄが穿たれ、このフランジ３３Ａを介してヨーク６の円
筒部６Ａの上面円周に固定される。勿論、ドームコーン
１９と座ぐり孔３３Ｃとは所定の間隔があけられてい
る。この様なホーンスロートの取付けによって高音用ス
ピーカの感度の向上が見込める。Next, a dome-shaped dome cone 19 made of titanium, beryllium or the like and having a dome shape is attached to the upper end of the second voice coil 13. As described above, the horn throat 33 is arranged in front of the opening of the dome cone 19 in order to enhance the sound emission efficiency of the high-pitched speaker arranged relatively downward. The structure of such a horn throat 33 is shown in FIGS. 3A and 3B. FIG. 3A is a side view with a partial cross section, and FIG. 3B is a bottom view. The horn throat 33 is a columnar member having a flange 33A on the upper surface and a stepped portion 33B having a small diameter portion D 1 smaller than the inner diameter of the voice coil 13 on the lower surface, and the bottom surface is matched with the curvature of the dome cone 19. Curvature R
Has a counterbore hole 33C with a radial sound emission hole 33 extending from the counterbore hole 33C in the direction of the flange 33A.
D is punched and fixed to the upper surface circumference of the cylindrical portion 6A of the yoke 6 via the flange 33A. Of course, the dome cone 19 and the counterbore hole 33C are spaced by a predetermined distance. By installing such a horn throat, it is expected that the sensitivity of the treble speaker will be improved.

【００４０】次に通気性の良いダストキャップ２４をコ
ーン１８に貼着することで防磁用の同軸型２ウエイスピ
ーカが図１の様に完成する。Next, a dust cap 24 having good air permeability is attached to the cone 18 to complete a magnetic shield type coaxial two-way speaker as shown in FIG.

【００４１】上述のケーシングとしてのシールドカバー
９は段部９Ｆを絞った上にセンタポール兼用のヨークの
センタポール部材９Ａを形成したが前記した図４の様に
シールドカバー９の底面部９Ｃから直接立ち上がる様に
センタポール部材９Ａを構成させてもよい。この様な他
のシールドカバー９の１例の実際の寸法を以下に詳記す
る。シールドカバー９の板厚ｔ1 は２．５ｍｍ、高さＨ
1 ＝３０ｍｍ、直径Ｄ 2 ＝８０ｍｍφであり、センタポ
ール部材９Ａの高さＨ2 ＝１５．５ｍｍでセンタポール
部材９Ａの内径Ｄ3 ＝１０．９ｍｍφであり、従って円
筒部９Ａの外径Ｄ4 ＝１５．９ｍｍφである。又ヨーク
６の板厚ｔ2 は４．５ｍｍで円筒部６Ａの内径Ｄ5 ＝１
７．５ｍｍφである。よって高音用スピーカの第２のギ
ャップ１１のギャップ幅は１．６ｍｍでギャップ長２ｍ
ｍで１００００ガウスが得られた。同様に上プレート４
の板厚ｔ3 ＝５ｍｍであり、ヨーク６の円筒部６Ａの外
径Ｄ6 ＝２６．５ｍｍφであり、上プレート４の中心孔
５の直径は２８．３ｍｍφであり、低中音スピーカとし
ての第１のギャップ１０のギャップ幅は１．８ｍｍでギ
ャップ長４ｍｍとした時の磁束密度は１２０００ガウス
が得られた。又、シールドカバー９の板厚ｔ1 を２．５
ｍｍとしたが、この厚みは必要な磁束密度やシールドカ
バーの作り易さ等から決定する様に成される。本例では
２．５ｍｍの板厚で防磁効果としては充分なものが得ら
れた。Shield cover as the above-mentioned casing
9 is a yoke that also serves as a center pole after squeezing the step 9F.
The center pole member 9A is formed, but as shown in FIG.
To stand up directly from the bottom surface 9C of the shield cover 9
The center pole member 9A may be configured. Other like this
The actual dimensions of one example of the shield cover 9 of are described in detail below.
It Thickness t of shield cover 91Is 2.5 mm, height H
1= 30 mm, diameter D 2= 80 mmφ, center port
Height H of base member 9A2Center pole at = 15.5mm
Inner diameter D of member 9A3= 10.9mmφ, therefore a circle
Outer diameter D of the cylindrical portion 9AFour= 15.9 mmφ. Again york
Plate thickness t of 62Is 4.5 mm and the inner diameter D of the cylindrical portion 6AFive= 1
It is 7.5 mmφ. Therefore, the second guitar
The gap width of the cap 11 is 1.6 mm and the gap length is 2 m.
A gauss of 10,000 Gauss was obtained. Similarly, upper plate 4
Plate thickness t3= 5 mm, outside the cylindrical portion 6A of the yoke 6.
Diameter D6= 26.5 mmφ, the central hole of the upper plate 4
The diameter of 5 is 28.3mmφ,
The gap width of the first gap 10 is 1.8 mm.
The magnetic flux density when the cap length is 4 mm is 12000 gauss
was gotten. Also, the thickness t of the shield cover 91To 2.5
mm, but this thickness is the required magnetic flux density and shield cover.
It is made according to the ease of making the bar. In this example
A 2.5 mm thick plate has sufficient magnetic shielding effect.
It was

【００４２】上述の実施例ではケーシングとして構成さ
れたシールドカバー９に形成したセンタポール部材９Ａ
をヨーク６の円筒部６Ａ内まで挿入させる構成の防磁用
の同軸型２ウエイスピーカを説明したが図５及び図６に
よって、本発明の他の構成のスピーカ並びにその組立方
法を説明する。In the above embodiment, the center pole member 9A formed on the shield cover 9 configured as a casing.
The coaxial type two-way loudspeaker for magnetic field shielding having a structure in which the coil is inserted into the cylindrical portion 6A of the yoke 6 has been described, but a speaker having another configuration of the present invention and an assembling method thereof will be described with reference to FIGS.

【００４３】図５は本例の他の実施例を示すスピーカの
構成図、図６はその組立説明図である。尚図１乃至図４
との対応部分には同一符号を付して重複説明を省略す
る。FIG. 5 is a block diagram of a speaker showing another embodiment of this embodiment, and FIG. 6 is an assembly explanatory diagram thereof. 1 to 4
Corresponding parts are designated by the same reference numerals and duplicate description will be omitted.

【００４４】本例の他のスピーカの全体的構成を説明す
る前に図６によって磁気回路の組立方法を詳記する。Before explaining the overall structure of another speaker of this example, the method of assembling the magnetic circuit will be described in detail with reference to FIG.

【００４５】本例では第１の磁気回路２５を構成する上
プレート４及び第１の磁石３は図１構成と同様であるが
ヨーク６′は板材構成の略々円盤状のフランジ６Ｂ′と
該フランジ６Ｂ′の中心位置に穿った中心孔に挿通され
るシリンダ状の円筒部６Ａ′とより構成され、フランジ
６Ｂ′の中心孔に対し、上下方向に突出する様に構成さ
れている。即ち、フランジ６Ｂ′の上面からの突出長Ｌ
1 は第１の磁石３の厚み及び上プレート４の厚み分の長
さに選択され、フランジ６Ｂ′の下面からの突出長Ｌ2
はシールドカバー９のセンタポール部材９Ａ，９Ａ′又
は底面部９Ｃに形成した透孔９Ｂ，９Ｂ′又は９Ｂ″ま
でより長くなる様に選択される。又、ヨーク６′は円筒
部６Ａ′とフランジ部６Ｂ′を一体にひき出す様に構成
させてもよい。In this example, the upper plate 4 and the first magnet 3 constituting the first magnetic circuit 25 are the same as those in FIG. 1, but the yoke 6'is a substantially disk-shaped flange 6B 'in the form of a plate. It is composed of a cylindrical cylindrical portion 6A 'which is inserted into a center hole formed at the center of the flange 6B' and is configured to project in the vertical direction with respect to the center hole of the flange 6B '. That is, the protrusion length L from the upper surface of the flange 6B '
1 is selected as the thickness of the first magnet 3 and the length of the thickness of the upper plate 4, and the protruding length L 2 from the lower surface of the flange 6B ′ is L 2.
Is selected to be longer than the center pole member 9A, 9A 'or the through hole 9B, 9B' or 9B "formed in the bottom surface portion 9C of the shield cover 9. Also, the yoke 6'and the cylindrical portion 6A 'and the flange. The portion 6B 'may be configured to be pulled out integrally.

【００４６】第１の磁気回路２５のギャップ１０は図２
Ａで説明したと同様の第１のギャップゲージ２７によっ
て所定のギャップが上プレート４の中心孔５の内径とヨ
ーク６の円筒部６Ａ′の上端部の外径部間に形成され
る。The gap 10 of the first magnetic circuit 25 is shown in FIG.
A predetermined gap is formed between the inner diameter of the central hole 5 of the upper plate 4 and the outer diameter portion of the upper end of the cylindrical portion 6A 'of the yoke 6 by the first gap gauge 27 similar to that described in A.

【００４７】又、シールドカバー９の底面部９Ｃに穿た
れる透孔９Ｂとしては図６Ｂ、図６Ｃ並びに図６Ｄに示
す如き構成が考えられる。Further, as the through hole 9B formed in the bottom surface portion 9C of the shield cover 9, the constitutions shown in FIGS. 6B, 6C and 6D can be considered.

【００４８】図６Ｂに示す構成ではケーシングカバー９
の底面部９Ｃに凸状のセンタポール部材９Ａを形成し、
このセンタポール部材９Ａの底部に比較的大径の透孔９
Ｂを穿ち、該透孔９Ｂと上記したヨーク６の円筒部６
Ａ′の外径との間に高音用スピーカの第２のギャップ１
１を形成する様に成したものである。In the configuration shown in FIG. 6B, the casing cover 9
Form a convex center pole member 9A on the bottom surface 9C of the
A through hole 9 having a relatively large diameter is formed at the bottom of the center pole member 9A.
B through the through hole 9B and the cylindrical portion 6 of the yoke 6 described above.
The second gap 1 of the treble speaker from the outer diameter of A '
1 is formed.

【００４９】又、図６Ｃに示す構成はシールドケース９
の底面部９Ｃに円周状の立ち上げ部９Ａ′を形成したも
ので、この立ち上げ部は透孔９Ｂ′を有している。従っ
て、この円周状の立ち上げ部９Ａ′の内径周面と図６Ａ
に示したヨーク６の円筒部６Ａ′の下方に突出した外周
間が高音用スピーカの第２のギャップ１１と成る。The structure shown in FIG. 6C has a shield case 9
The bottom surface 9C of the above is formed with a circumferential rising portion 9A ', and this rising portion has a through hole 9B'. Therefore, the inner peripheral surface of the circumferential rising portion 9A 'and FIG.
A second gap 11 of the high-frequency speaker is formed between outer peripheries of the yoke 6 protruding downward from the cylindrical portion 6A '.

【００５０】同様に図６Ｄに示す様にシールドカバー９
の底面部９Ｃの略々中心位置に穿った透孔９Ｂ″を形成
した場合も図６Ａに示すヨーク６の円筒部６Ａ′の外径
と透孔９Ｂ″の内径間が高音用スピーカの第２のギャッ
プ１１となる。Similarly, as shown in FIG. 6D, the shield cover 9
Even when the through hole 9B ″ is formed substantially at the center of the bottom surface 9C, the distance between the outer diameter of the cylindrical portion 6A ′ of the yoke 6 and the inner diameter of the through hole 9B ″ shown in FIG. The gap 11 becomes.

【００５１】これらシールドカバー９に穿った透孔９
Ｂ，９Ｂ′又は９Ｂ″を第３のギャップゲージ３２の外
径部に挿通させる。勿論、これらシールドケース９の円
筒内の底面部９Ｃの上側にはキャンセル用の第１の磁気
回路２５の磁石３とは逆に着磁した第２の磁石８が接着
剤等を介して貼着されている。Through holes 9 formed in these shield covers 9
B, 9B 'or 9B "is inserted through the outer diameter portion of the third gap gauge 32. Of course, above the bottom surface portion 9C in the cylinder of these shield cases 9, the magnet of the canceling first magnetic circuit 25 is provided. The second magnet 8 magnetized in the opposite direction to that of No. 3 is attached via an adhesive or the like.

【００５２】ヨーク６′の下方に突出した円筒部６Ａ′
には第３のギャップゲージ３２を嵌着させる。この第３
のギャップゲージは第１及び第２のゲージと同様の構成
と成されている。この第３のギャップゲージ３２の上部
には把持部３２Ａが設けられ、下面にはヨーク６のフラ
ンジ６Ｂ′より下方に突出した円筒部６Ａ′の外径に嵌
合する様に成された凹部３２Ｄが設けられ、円筒部挟持
用のゲージ部３２Ｂが形成され、この円筒部挟持用ゲー
ジ部３２Ｂの挟持幅Ｗ1 が第２の磁気回路２６の高音用
スピーカのボイスコイルが挿入されるギャップ幅を定め
ている。更にギャップゲージ３２の中心には上面から凹
部３２Ｄの外周に分岐する透孔３２Ｃが穿たれ、円筒部
６Ａ′を吸着するため真空吸着装置等で吸着保持される
様に成されている。Cylindrical portion 6A 'protruding below the yoke 6'
A third gap gauge 32 is fitted in the. This third
The gap gauge has a structure similar to that of the first and second gauges. A grip portion 32A is provided on an upper portion of the third gap gauge 32, and a concave portion 32D formed on the lower surface so as to be fitted to the outer diameter of the cylindrical portion 6A 'projecting downward from the flange 6B' of the yoke 6. Is provided and a gauge portion 32B for sandwiching the cylindrical portion is formed, and the sandwiching width W 1 of the gauge portion 32B for sandwiching the cylindrical portion is the gap width into which the voice coil of the high frequency speaker of the second magnetic circuit 26 is inserted. It has established. Further, a through hole 32C is formed in the center of the gap gauge 32 so as to branch from the upper surface to the outer periphery of the recess 32D, and the cylindrical portion 6A 'is sucked and held by a vacuum suction device or the like.

【００５３】この様に第１の磁気回路２５の上プレート
４とヨーク６の上側に突出した円筒部６Ｂ′間に第１の
ギャップゲージ２７を挿入し、上プレート４を第１の磁
石３の上面に貼着し、乾燥後に第１のギャップゲージ２
７を抜き取った後に図６Ａの様に第３のギャップゲージ
３２をヨーク６の下方に突出した円筒部６Ａ′の外径に
嵌合させ、図６Ｂ〜図６Ｄに示す第２の磁気回路２６の
いずれか一つを矢印Ｕ 2 の様に上動させて、透孔９Ｂ，
９Ｂ′，９Ｂ″のいずれかを第３のギャップゲージ３２
の外径（ゲージ部３２Ｂ）に嵌挿させる。この際、第１
及び第２の磁石３及び８との反撥力によって矢印Ｕ2 と
反対方向に押し戻されるが、第２の磁気回路２６のシー
ルドカバー９内に第２の磁気回路２５を内挿して、接着
剤等を介して第２の磁石８の上面にフランジ６Ｂ′の下
面を接合させる。Thus, the upper plate of the first magnetic circuit 25
4 and the cylindrical portion 6B ′ protruding above the yoke 6
Insert the gap gauge 27 and attach the upper plate 4 to the first magnet.
Stick it on the top surface of the stone 3 and, after drying, the first gap gauge 2
After removing 7, remove the third gap gauge as shown in Fig. 6A.
32 to the outer diameter of the cylindrical portion 6A ′ protruding below the yoke 6.
Of the second magnetic circuit 26 shown in FIGS. 6B to 6D.
Arrow U to either one 2, And the through hole 9B,
Either 9B 'or 9B "is the third gap gauge 32
The outer diameter (gauge portion 32B) of the. At this time, the first
And the repulsive force with the second magnets 3 and 8 causes an arrow U2When
The second magnetic circuit 26 is pushed back in the opposite direction,
The second magnetic circuit 25 is inserted into the field cover 9 and bonded.
Under the flange 6B 'on the upper surface of the second magnet 8 through an agent or the like.
Join faces.

【００５４】上述の図６Ｂに示した第２の磁気回路２６
を第１の磁気回路２５に結合した組立状態の１例は図５
に示されている。The second magnetic circuit 26 shown in FIG. 6B described above.
FIG. 5 shows an example of an assembled state in which is connected to the first magnetic circuit 25.
Is shown in.

【００５５】図５に示すスピーカの構造に於いて、図１
のスピーカと異なる部分は透孔９Ｂの内径部と下方向に
突出した円筒部６Ｂ′の外径部との間の第２のギャップ
１１に高音用のボイスコイル１３が介在され、ダンパー
１５で揺動自在に枢着されると共にボイスコイルの下端
側にドームコーン１９が配設され、ボイスコイル１３へ
の電流供給はシールドカバー９の底面に取付けられたラ
グ板３６及び錦糸線３８を介して行われる。ホーンスロ
ート３３の下端にはイコライザ４０が設けられ、ドーム
コーン１９からの音を上方に放音させる。尚４１はドー
ムコーン１９を保護するための振動板カバーである。In the structure of the speaker shown in FIG.
A portion different from the speaker of FIG. 2 has a voice coil 13 for high sound interposed in a second gap 11 between the inner diameter portion of the through hole 9B and the outer diameter portion of the cylindrical portion 6B 'protruding downward, and is oscillated by the damper 15. A dome cone 19 is rotatably pivotally mounted and a dome cone 19 is disposed on the lower end side of the voice coil, and current is supplied to the voice coil 13 via a lug plate 36 and a tinsel wire 38 attached to the bottom surface of the shield cover 9. Be seen. An equalizer 40 is provided at the lower end of the horn throat 33 to emit the sound from the dome cone 19 upward. Reference numeral 41 is a diaphragm cover for protecting the dome cone 19.

【００５６】本発明のスピーカ及びスピーカの組立方法
は叙上の様に構成し、且つ組み立てられているので高音
用スピーカの第２の磁石をキャンセル用磁石に兼用出来
ると共に防磁用のシールドカバーと一体に高音用スピー
カのセンタポール又はヨーク或いはセンタポール兼用ヨ
ークを兼用させる第２のギャップ形成部材が得られるの
で２ウエイスピーカを極めて小型に構成可能となる。Since the speaker and the method of assembling the speaker of the present invention are constructed and assembled as described above, the second magnet of the speaker for high-pitched sound can be used as the canceling magnet and can be integrated with the shield cover for magnetic field prevention. In addition, since the second gap forming member which also serves as the center pole or the yoke of the high frequency speaker or the yoke also serving as the center pole can be obtained, the two-way speaker can be made extremely small.

【００５７】更にスピーカの組立が簡単で第１及び第２
の磁気回路の組立のみで防磁用のシールドカバー組立工
程を省略可能なものが得られる。Further, the speaker can be easily assembled by the first and second
It is possible to obtain a magnetic shield that can omit the shield cover assembly process only by assembling the magnetic circuit.

【００５８】[0058]

【発明の効果】本発明のスピーカによれば第２の磁気回
路を構成するセンタポール又はヨーク或いはセンタポー
ル兼用ヨーク等をシールドカバーと兼用可能と出来るの
で磁気回路の高さを小さくし、スピーカの構成を全体と
して小型化することが可能な同軸型２ウエイスピーカが
得られる。According to the speaker of the present invention, the center pole or the yoke constituting the second magnetic circuit or the yoke also serving as the center pole can be used also as the shield cover, so that the height of the magnetic circuit can be reduced and the speaker A coaxial two-way speaker that can be downsized as a whole can be obtained.

【００５９】本発明によれば第１及び第２の磁気回路を
組み立てるのみで、シールドカバーを組み立てる工程を
省くことの出来るスピーカの組立方法が得られる。According to the present invention, it is possible to obtain the speaker assembling method in which the steps of assembling the shield cover can be omitted only by assembling the first and second magnetic circuits.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明のスピーカの一実施例を示す構成図であ
る。FIG. 1 is a configuration diagram showing an embodiment of a speaker of the present invention.

【図２】本発明のスピーカ磁気回路の組立方法の一実施
例を示す説明図である。FIG. 2 is an explanatory view showing an embodiment of an assembling method of the speaker magnetic circuit of the present invention.

【図３】本発明のスピーカに用いるホーンスロートの構
成図である。FIG. 3 is a configuration diagram of a horn throat used in the speaker of the present invention.

【図４】本発明の磁気回路の他の構成図である。FIG. 4 is another configuration diagram of the magnetic circuit of the present invention.

【図５】本発明のスピーカの他の実施例を示す構成図で
ある。FIG. 5 is a configuration diagram showing another embodiment of the speaker of the present invention.

【図６】本発明のスピーカ磁気回路の組立方法の他の実
施例を示す説明図である。FIG. 6 is an explanatory view showing another embodiment of the method for assembling the speaker magnetic circuit of the present invention.

【図７】従来のスピーカの構成図である。FIG. 7 is a configuration diagram of a conventional speaker.

【符号の説明】[Explanation of symbols]

１ スピーカ ３ 第１の磁石 ４ 上プレート ８ 第２の磁石 ９ シールドカバー ９Ａ センタポール部 ９Ｂ 透孔 １０，１１ 第１及び第２のギャップ ２５，２６ 第１及び第２の磁気回路 DESCRIPTION OF SYMBOLS 1 Speaker 3 1st magnet 4 Upper plate 8 2nd magnet 9 Shield cover 9A Center pole part 9B Through hole 10 and 11 1st and 2nd gap 25 and 26 1st and 2nd magnetic circuit

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 第１の磁気回路に設けた第１の磁石に対
し、第２の磁気回路に設けたキャンセル用の第２の磁石
によって漏洩磁束を減少させる様に成したスピーカに於
いて、 上記第２の磁気回路のギャップを構成する部分を防磁用
のシールドカバーと一体に構成させて成ることを特徴と
するスピーカ。1. A speaker in which leakage magnetic flux is reduced with respect to a first magnet provided in a first magnetic circuit by a second canceling magnet provided in a second magnetic circuit, A speaker characterized in that a portion of the second magnetic circuit forming a gap is integrally formed with a magnetic shield shield cover. 【請求項２】 前記防磁用のシールドカバーによって前
記第２の磁気回路のギャップを構成する部分のヨーク兼
用センタポールを一体に形成させて成ることを特徴とす
る請求項１記載のスピーカ。2. The speaker according to claim 1, wherein a center pole serving also as a yoke of a portion forming a gap of the second magnetic circuit is integrally formed by the shield cover for magnetic field prevention. 【請求項３】 前記第１の磁気回路を構成するギャップ
内に低中音用スピーカのボイスコイルを挿通して揺動自
在に枢着し、前記第２の磁気回路を構成するギャップ内
に高音用スピーカのボイスコイルを挿通して揺動自在に
枢着して同軸型２ウエイと成したことを特徴とする請求
項１又は請求項２記載のスピーカ。3. A voice coil of a speaker for low and middle tones is inserted into a gap forming the first magnetic circuit and pivotally attached so as to be swingable, and a high-pitched sound is generated in a gap forming the second magnetic circuit. 3. The speaker according to claim 1, wherein the speaker is a coaxial type two-way by swingably pivotingly attached through a voice coil of the speaker. 【請求項４】 前記第２の磁気回路に配設した高音用ス
ピーカの放音孔全面にホールスロートを配設して成るこ
とを特徴とする請求項３記載のスピーカ。4. The speaker according to claim 3, wherein a hall throat is provided on the entire surface of the sound output hole of the high-frequency speaker provided in the second magnetic circuit. 【請求項５】 メインの第１の磁石と円筒部を有するヨ
ーク並びに上プレートで構成された第１のギャップを有
する第１の磁気回路を組み立てる工程と、 防磁用のシールドカバーに第２のギャップと対応するセ
ンタポール部材を形成し、キャンセル用の第２の磁石を
該シールドカバー上に配設して第２の磁気回路を組み立
てる工程と、 上記第２のギャップと対応するセンタポール部材にギャ
ップゲージを嵌着させ、上記第１の磁気回路の円筒部に
挿入させて、第１及び第２の磁気回路を組み立ててなる
ことを特徴とするスピーカの組立方法。5. A step of assembling a first magnetic circuit having a first gap composed of a main first magnet, a yoke having a cylindrical portion, and an upper plate, and a second gap in a shield cover for magnetic shielding. A step of forming a center pole member corresponding to, and assembling the second magnetic circuit by disposing a second magnet for cancellation on the shield cover; and a gap in the center pole member corresponding to the second gap. A method for assembling a speaker, characterized in that a gauge is fitted and inserted into the cylindrical portion of the first magnetic circuit to assemble the first and second magnetic circuits. 【請求項６】 メインの第１の磁石と円筒部を設けたヨ
ーク並びに上プレートで構成された第１のギャップを有
する第１の磁気回路を組み立てる工程と、 防磁用のシールドカバーに第２のギャップと対応するセ
ンタポール部分又は底面部に穿った透孔を形成し、キャ
ンセル用の第２の磁石を該シールドカバー上に配設して
第２の磁気回路を組み立てる工程と、 上記第１の磁気回路の上記円筒部材にギャップゲージを
嵌着させ上記第２の磁気回路のセンタポール部分又は底
面部に穿った透孔を該ギャップゲージの外周部に挿入さ
せて、第１及び第２の磁気回路を組み立ててなることを
特徴とするスピーカの組立方法。6. A step of assembling a first magnetic circuit having a first gap composed of a main first magnet, a yoke provided with a cylindrical portion, and an upper plate; A step of assembling a second magnetic circuit by forming a through hole in a center pole portion or a bottom surface portion corresponding to the gap and disposing a canceling second magnet on the shield cover; A gap gauge is fitted to the cylindrical member of the magnetic circuit, and a through hole formed in the center pole portion or the bottom surface portion of the second magnetic circuit is inserted into the outer peripheral portion of the gap gauge so that the first and second magnetic fields are formed. A method of assembling a speaker, characterized by comprising assembling a circuit.
JP4729294A 1994-03-17 1994-03-17 Speaker and assembling method for speaker Pending JPH07264694A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4729294A JPH07264694A (en) 1994-03-17 1994-03-17 Speaker and assembling method for speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4729294A JPH07264694A (en) 1994-03-17 1994-03-17 Speaker and assembling method for speaker

Publications (1)

Publication Number Publication Date
JPH07264694A true JPH07264694A (en) 1995-10-13

Family

ID=12771211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4729294A Pending JPH07264694A (en) 1994-03-17 1994-03-17 Speaker and assembling method for speaker

Country Status (1)

Country Link
JP (1) JPH07264694A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003105526A1 (en) * 2002-06-07 2003-12-18 松下電器産業株式会社 Method for producing repulsion magnetic circuit and its production system
JP2009049970A (en) * 2007-08-14 2009-03-05 Klaus Reck Coaxial loudspeaker
JP2009533922A (en) * 2006-04-13 2009-09-17 ジーピー アコースティクス（ユーケイ）リミテッド Phase plug
JP2019047464A (en) * 2017-09-07 2019-03-22 株式会社デジタルドメイン Speaker system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003105526A1 (en) * 2002-06-07 2003-12-18 松下電器産業株式会社 Method for producing repulsion magnetic circuit and its production system
US6888433B2 (en) 2002-06-07 2005-05-03 Matsushita Electric Industrial Co., Ltd. Method for producing repulsion magnetic circuit and its production system
JP2009533922A (en) * 2006-04-13 2009-09-17 ジーピー アコースティクス（ユーケイ）リミテッド Phase plug
JP2009049970A (en) * 2007-08-14 2009-03-05 Klaus Reck Coaxial loudspeaker
JP2019047464A (en) * 2017-09-07 2019-03-22 株式会社デジタルドメイン Speaker system

Similar Documents

Publication Publication Date Title
US8009857B2 (en) Induction motor for loudspeaker
US5835612A (en) Speaker apparatus
EP1206162B1 (en) Speaker apparatus
JPH0198400A (en) Speaker
US7899202B2 (en) Loudspeaker with cone-coupled damper
US7561705B2 (en) Reduction of flux leakage in a dynamic microphone
JPH10304493A (en) Electroacoustic transducer and acoustoelectric transducer
JPH07264694A (en) Speaker and assembling method for speaker
JP2019134411A (en) Acoustic equipment with improved acoustic performance
JPH08317489A (en) Speaker device
JPH0974599A (en) Speaker device
JPH08289385A (en) Speaker
US2957053A (en) Audio-electric translating device
JP3834508B2 (en) Magnetic circuit of speaker
JP2000278792A (en) Speaker and speaker unit
JP3296736B2 (en) Repulsion magnetic circuit type speaker
JPH07250394A (en) Speaker and assembly method for speaker
JP3214816B2 (en) Speaker
KR20010042970A (en) Speaker and speaker apparatus
JP3598603B2 (en) Speaker device
JP2000358296A (en) Speaker and speaker device
JP3991897B2 (en) Electromagnetic coupling type electrodynamic speaker
JPH08289384A (en) Speaker
JP2002010391A (en) Speaker, electronic device having it and reduction method of its leakage flux
JPH07250395A (en) Speaker