JP3911409B2 - Speaker voice coil bobbin structure - Google Patents

Speaker voice coil bobbin structure Download PDF

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Publication number
JP3911409B2
JP3911409B2 JP2001365758A JP2001365758A JP3911409B2 JP 3911409 B2 JP3911409 B2 JP 3911409B2 JP 2001365758 A JP2001365758 A JP 2001365758A JP 2001365758 A JP2001365758 A JP 2001365758A JP 3911409 B2 JP3911409 B2 JP 3911409B2
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JP
Japan
Prior art keywords
voice coil
coil bobbin
diaphragm
neck
speaker
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.)
Expired - Fee Related
Application number
JP2001365758A
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Japanese (ja)
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JP2003169394A (en
Inventor
達史 冨沢
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.)
Kenwood KK
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Kenwood KK
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Publication of JP2003169394A publication Critical patent/JP2003169394A/en
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Description

【０００１】
【発明の属する技術分野】
この発明はスピーカのボイスコイルボビン構造に係わり、特に、ボイスコイルボビンに巻かれたボイスコイルを振動板のネックに挿通させて組み立てるスピーカに好適なボイスコイルボビン構造に関する。
【０００２】
【従来の技術】
従来のスピーカのボイスコイルボビン構造を図４〜図６により説明する。図５に示すボイスコイルボビン８はストレートの円筒形に形成されており、その上にボイスコイル５が巻かれる。図４によりこのボイスコイルボビン８がスピーカに組み付けられる方法を説明する。
【０００３】
図に示すフレーム９にマグネット１０を固着し、フレーム９のダンパー６の外周が接着される位置に接着剤を塗布し、ボイスコイルボビン８にダンパー６を嵌め込んだ状態（接着はしていない）のものをフレーム９の中央に位置決めし、ダンパー６の外周を接着し、次いで、ダンパー６の内周部に接着剤を流し込む。
【０００４】
次に、フレーム９の振動板７の外周が接着される位置に接着剤を塗布し、振動板７のネックをボイスコイル５に挿通させて振動板７の外周を接着した後、接着剤１３によりボイスコイルボビン８に接着する。その後ヨーク１１をマグネット１０に接着または図示していないねじで締着してマグネット１０とヨーク１１で磁気回路を形成する。
【０００５】
このようにして磁気回路の磁気ギャプにボイスコイル５が配置される。なお、錦糸線１２はボイスコイル５とスピーカ入力端子とを接続している。このように磁気回路をボイスコイルと振動板との接着位置より上方に配置することによりスピーカ全体を薄型に構成することができる。
【０００６】
【発明が解決しようとする課題】
上記した従来のボイスコイルボビン構造では、振動板ネックと接着される部分の外径がボイスコイル５の外径よりボイスコイル５の厚みだけ小さくなる。一方、振動板ネックの内径はボイスコイル５を挿通させるためボイスコイル５の外径より大きくしなければならないので、図６に示すようにボイスコイル５の半径Ａに対して振動板ネック７ａの半径Ｂが大きくなり、接着部にクリアランスＣが生じる。このクリアランスＣは接着剤により埋めることになるが、振動の伝達ロスが発生したり、接着剤が垂れ込む等して製造不良が発生することがあった。
【０００７】
この発明は上記した点に鑑みてなされたものであって、その目的とするところは、ボイスコイルボビンの振動板ネックと接着する部分の外径を大きくすることにより振動板ネックと接着する部分のクリアランスを小さくすることができるスピーカのボイスコイルボビン構造を提供することにある。
【０００８】
【課題を解決するための手段】
この発明のスピーカのボイスコイルボビン構造は、コーン形振動板の内側中心軸線上にフレームで支持された磁石が配置され、前記磁石に磁気ギャップを挟むようにヨークが固着され、前記磁気ギャップにボイスコイルが配置されるスピーカに用いられるボイスコイルボビンであって、ボイスコイルの巻かれる部分の外径より振動板のネックに固着される部分の外径が大きくなるように一体成形してボイスコイルボビンを形成し、前記振動板のネックに固着される部分の円筒面とボイスコイルの巻かれる部分の円筒面とをＲ形状部で接続すると共に、前記Ｒ形状部とボイスコイルの巻かれる部分の円筒面との接続部が滑らかに形成されているものである。
【０００９】
また、前記ボイスコイルボビン構造において、樹脂にて成形されたものである。
【００１２】
【発明の実施の形態】
この発明の実施例であるスピーカのボイスコイルボビン構造を図面に基づいて説明する。図２にこの発明の参考例であるスピーカのボイスコイルボビン構造を示す。図において、円筒部材１にはリング２を密嵌合して接着剤で円筒部材１とリング２とを固着してボイスコイルボビン３が形成される。円筒部材１にボイスコイル５が巻かれるが、リング２の外径をボイスコイル５の外径より大きくしてある。
【００１３】
このように形成されたボイスコイル５は従来例で説明したようにスピーカに組み込まれるが、その状態を図１により説明する。振動板７の振動板ネック７ａはボイスコイル５を挿通するために内径がボイスコイル５の外径より大きい。しかしながら、リング２の外径はボイスコイル５の外径より大きく、振動板ネック７ａとの接着部のクリアランスを調整することができる。
【００１４】
図３はこの発明の実施例であるボイスコイルボビンの中心軸の片側を一部断面として示す側面図である。この例では樹脂成形によりボイスコイルボビン４が作られている。
【００１５】
ボイスコイルボビン４のボイスコイルの巻かれる円筒面４ａの半径Ｄは振動板のネックに固着される円筒面４ｂの半径Ｅより小さく、その段差の部分がＲ形状部４ｃで接続されている。この例でも振動板ネックとの接着部のクリアランスを小さくすることができるが、さらに、Ｒ形状部４ｃにより振動板ネックとの嵌合が容易となる。
【００１７】
さらに、振動板のネックに固着される円筒面をボイスコイルの外径と同じとするか、僅かに小さくしてもこの発明の効果が得られる。
【００１８】
【発明の効果】
この発明のスピーカのボイスコイルボビン構造によれば、振動板ネックとのクリアランスが殆どなくなるため、振動の伝達ロスが極めて小さくなり、音質も向上する。
【００１９】
また、製造工程での接着剤の垂れ込み、振動板の貼りずれ、傾き等の不良が発生しなくなる。
【図面の簡単な説明】
【図１】 この発明の参考例であるボイスコイルボビンの中心軸の片側を一部断面として示す側面図である。
【図２】同ボイスコイルボビンを示す斜視図である。
【図３】 この発明の実施例であるボイスコイルボビンの中心軸の片側を一部断面として示す側面図である。
【図４】従来のボイスコイルボビンを用いたスピーカの中心軸の片側を一部断面として示す側面図である。
【図５】従来のボイスコイルボビンの中心軸の片側を一部断面として示す側面図である。
【図６】同ボイスコイルボビンの中心軸の片側を一部断面として示す作用を説明するための側面図である。
【符号の説明】
１ 円筒部材
２ リング
３ ボイスコイルボビン
４ ボイスコイルボビン、４ａ ボイスコイルの巻かれる円筒面
４ｂ 振動板のネックに固着される円筒面、４ｃ Ｒ形状部
５ ボイスコイル
６ ダンパー
７ 振動板、７ａ 振動板ネック
８ ボイスコイルボビン
９ フレーム
１０ マグネット
１１ ヨーク
１２ 錦糸線
１３ 接着剤[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a voice coil bobbin structure of a speaker, and more particularly to a voice coil bobbin structure suitable for a speaker assembled by inserting a voice coil wound around a voice coil bobbin through a neck of a diaphragm.
[0002]
[Prior art]
A voice coil bobbin structure of a conventional speaker will be described with reference to FIGS. The voice coil bobbin 8 shown in FIG. 5 is formed in a straight cylindrical shape, and the voice coil 5 is wound thereon. A method of assembling the voice coil bobbin 8 to the speaker will be described with reference to FIG.
[0003]
The magnet 10 is fixed to the frame 9 shown in the figure, an adhesive is applied to the position where the outer periphery of the damper 6 of the frame 9 is bonded, and the damper 6 is fitted into the voice coil bobbin 8 (not bonded). An object is positioned at the center of the frame 9, the outer periphery of the damper 6 is bonded, and then an adhesive is poured into the inner peripheral portion of the damper 6.
[0004]
Then, after the outer periphery of the diaphragm 7 of the frame 9 is an adhesive is applied to a position to be bonded, and bonding the outer periphery of the diaphragm 7 a network click of the vibration plate 7 is inserted into the ball Isukoiru 5, adhesive 13 Is bonded to the voice coil bobbin 8. Thereafter, the yoke 11 is bonded to the magnet 10 or fastened with a screw (not shown) to form a magnetic circuit with the magnet 10 and the yoke 11.
[0005]
In this way, the voice coil 5 is arranged in the magnetic gap of the magnetic circuit. The tinsel wire 12 connects the voice coil 5 and a speaker input terminal. By arranging the magnetic circuit above the bonding position between the voice coil and the diaphragm in this way, the entire speaker can be made thin.
[0006]
[Problems to be solved by the invention]
In the conventional voice coil bobbin structure described above, the outer diameter of the portion bonded to the diaphragm neck is smaller than the outer diameter of the voice coil 5 by the thickness of the voice coil 5. On the other hand, since the inner diameter of the diaphragm neck must be larger than the outer diameter of the voice coil 5 in order to insert the voice coil 5, the radius of the diaphragm neck 7a with respect to the radius A of the voice coil 5 as shown in FIG. B becomes large, and clearance C is generated at the bonded portion. Although this clearance C is filled with an adhesive, there may be a manufacturing failure due to vibration transmission loss or dripping of the adhesive.
[0007]
The present invention has been made in view of the above points, and its object is to increase the outer diameter of the portion of the voice coil bobbin that adheres to the diaphragm neck to increase the clearance of the portion that adheres to the diaphragm neck. It is an object of the present invention to provide a voice coil bobbin structure for a speaker that can reduce the size of the speaker.
[0008]
[Means for Solving the Problems]
In the voice coil bobbin structure of the speaker according to the present invention, a magnet supported by a frame is disposed on the inner central axis of the cone-shaped diaphragm, and a yoke is fixed to the magnet so as to sandwich a magnetic gap. The voice coil bobbin used in a speaker in which the voice coil is disposed is integrally formed so that the outer diameter of the portion fixed to the neck of the diaphragm is larger than the outer diameter of the portion around which the voice coil is wound. The cylindrical surface of the portion fixed to the neck of the diaphragm and the cylindrical surface of the portion around which the voice coil is wound are connected by an R-shaped portion, and the R-shaped portion and the cylindrical surface of the portion around which the voice coil is wound are connected The connecting portion is formed smoothly.
[0009]
Further, the voice coil bobbin structure is formed of resin .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A voice coil bobbin structure of a speaker according to an embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows a voice coil bobbin structure of a speaker which is a reference example of the present invention. In the figure, a voice coil bobbin 3 is formed by closely fitting a ring 2 to a cylindrical member 1 and fixing the cylindrical member 1 and the ring 2 with an adhesive. The voice coil 5 is wound around the cylindrical member 1, but the outer diameter of the ring 2 is larger than the outer diameter of the voice coil 5.
[0013]
The voice coil 5 formed in this way is incorporated in the speaker as described in the conventional example, and the state will be described with reference to FIG. The diaphragm neck 7 a of the diaphragm 7 has an inner diameter larger than the outer diameter of the voice coil 5 in order to insert the voice coil 5. However, the outer diameter of the ring 2 is larger than the outer diameter of the voice coil 5, and the clearance of the bonding portion with the diaphragm neck 7a can be adjusted.
[0014]
FIG. 3 is a side view showing a partial cross section of one side of the central axis of the voice coil bobbin according to the embodiment of the present invention. In this example, the voice coil bobbin 4 is made by resin molding.
[0015]
The radius D of the cylindrical surface 4a around which the voice coil of the voice coil bobbin 4 is wound is smaller than the radius E of the cylindrical surface 4b fixed to the neck of the diaphragm, and the stepped portion is connected by the R-shaped portion 4c. In this example as well, the clearance of the bonding portion with the diaphragm neck can be reduced, but the fitting with the diaphragm neck is facilitated by the R-shaped portion 4c.
[0017]
Furthermore, the effect of the present invention can be obtained even if the cylindrical surface fixed to the neck of the diaphragm is the same as or slightly smaller than the outer diameter of the voice coil.
[0018]
【The invention's effect】
According to the voice coil bobbin structure of the speaker of the present invention, since there is almost no clearance from the diaphragm neck, vibration transmission loss is extremely reduced and sound quality is improved.
[0019]
In addition, defects such as sagging of the adhesive, displacement of the diaphragm, and inclination in the manufacturing process do not occur.
[Brief description of the drawings]
FIG. 1 is a side view showing a partial cross section of one side of a central axis of a voice coil bobbin that is a reference example of the present invention.
FIG. 2 is a perspective view showing the voice coil bobbin.
FIG. 3 is a side view showing a partial cross section of one side of a central axis of a voice coil bobbin according to an embodiment of the present invention.
FIG. 4 is a side view showing a partial cross section of one side of a central axis of a speaker using a conventional voice coil bobbin.
FIG. 5 is a side view showing a partial cross section of one side of a central axis of a conventional voice coil bobbin.
FIG. 6 is a side view for explaining the operation of the voice coil bobbin showing one side of the central axis as a partial cross section.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical member 2 Ring 3 Voice coil bobbin 4 Voice coil bobbin, 4a Cylindrical surface 4b where a voice coil is wound Cylindrical surface fixed to the neck of a diaphragm 4c R shape part 5 Voice coil 6 Damper 7 Diaphragm, 7a Diaphragm neck 8 Voice coil bobbin 9 Frame 10 Magnet 11 Yoke 12 Kinshi wire 13 Adhesive

Claims (2)

コーン形振動板の内側中心軸線上にフレームで支持された磁石が配置され、前記磁石に磁気ギャップを挟むようにヨークが固着され、前記磁気ギャップにボイスコイルが配置されるスピーカに用いられるボイスコイルボビンであって、ボイスコイルの巻かれる部分の外径より振動板のネックに固着される部分の外径が大きくなるように一体成形してボイスコイルボビンを形成し、前記振動板のネックに固着される部分の円筒面とボイスコイルの巻かれる部分の円筒面とをＲ形状部で接続すると共に、前記Ｒ形状部とボイスコイルの巻かれる部分の円筒面との接続部が滑らかに形成されているスピーカのボイスコイルボビン構造。 A voice coil bobbin used in a speaker in which a magnet supported by a frame is disposed on the inner central axis of a cone-shaped diaphragm, a yoke is fixed to the magnet so as to sandwich a magnetic gap, and a voice coil is disposed in the magnetic gap. The voice coil bobbin is formed by integral molding so that the outer diameter of the portion fixed to the neck of the diaphragm is larger than the outer diameter of the portion around which the voice coil is wound, and is fixed to the neck of the diaphragm. The cylindrical surface of the portion and the cylindrical surface of the portion on which the voice coil is wound are connected by an R-shaped portion, and the connection portion between the R-shaped portion and the cylindrical surface of the portion on which the voice coil is wound is smoothly formed Voice coil bobbin structure. 樹脂にて成形された請求項１のスピーカのボイスコイルボビン構造。 2. The voice coil bobbin structure for a speaker according to claim 1, which is formed of resin .
JP2001365758A 2001-11-30 2001-11-30 Speaker voice coil bobbin structure Expired - Fee Related JP3911409B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001365758A JP3911409B2 (en) 2001-11-30 2001-11-30 Speaker voice coil bobbin structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001365758A JP3911409B2 (en) 2001-11-30 2001-11-30 Speaker voice coil bobbin structure

Publications (2)

Publication Number Publication Date
JP2003169394A JP2003169394A (en) 2003-06-13
JP3911409B2 true JP3911409B2 (en) 2007-05-09

Family

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Family Applications (1)

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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7244165B2 (en) 2019-03-08 2023-03-22 株式会社エクセディ pulley device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7244165B2 (en) 2019-03-08 2023-03-22 株式会社エクセディ pulley device

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