JPH05304027A - Drum core with electrode and electrode body - Google Patents

Abstract

PURPOSE:To enable the bonding step of the title drum core with electrodes capable of stably connecting to a substrate with wider selecting range of wire diameter onto electrodes to the drum core to be made efficient. CONSTITUTION:The title drum core with electrodes is composed of a pair of symmetrical electrodes 7, 8 wherein an electrode raw plate comprising a metallic plate in specific thickness made of narrow width short plates 4 and wide width long plates 5 integrally stamped in L-shape while the wide long plates 5 are respectively fold-formed to be overlapped with one another in specific length from the ends thereof on one side and the other side toward the narrow width short plates 4 as well as a drum core 1 wherein an L-type recessed trench 2 and an inverse L-type recessed trench 3 with the wide width sides of said plates 5 symmetrically arranged on the central line orthgonal to the central line on the rear surface of the drum core 1 while the narrow width sides of said plates 4 arranged on the other sides are formed on said rear surface. On the other hand, the electrode bodies are formed of multiple pairs of electrodes comprising the electrode raw plates in L-shape and the other electrode raw plateds in inverse L-shape and in the same shape and thickness symmetrically stamped into multiple pairs of lead frames using the narrow width short plates 4 side a axes as well as the wide width long plates 5 are fold-formed to be overlapped with one another.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は表面実装用の電極付きド
ラムコアと該コアに用いる電極体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum core with an electrode for surface mounting and an electrode body used for the core.

【０００２】[0002]

【従来の技術】従来の技術により提供された電極付きド
ラムコアは、その１として、リードフレームの梯子状電
極の上にドラムコアを載せて接着するタイプでは、接着
面積が十分でなく、接着強度を得るためには大量に接着
剤を塗布しなければならず、電極と基板の接続に支障を
来すおそれがあり、また、電極の基板への接続面とコイ
ルリードの電極の接続面間に空間がないため、コイルリ
ードを接続した部分が膨らむと基板マウント時に不安定
となり、しかも太いワイヤが巻けないなどの不具合が生
ずる。2. Description of the Related Art One of the conventional drum cores with electrodes provided by the prior art is a type in which a drum core is placed on a ladder-shaped electrode of a lead frame and bonded to each other. Therefore, a large amount of adhesive must be applied, which may hinder the connection between the electrode and the substrate, and there is a space between the connection surface of the electrode to the substrate and the connection surface of the coil lead electrode. Therefore, if the portion to which the coil lead is connected swells, it becomes unstable when the substrate is mounted, and there is a problem that a thick wire cannot be wound.

【０００３】その２として、コア下面に直接金属電極を
焼き付けるタイプでは、電極が半田の熱で剥がれ落ちた
り、電極にワイヤを接続する際には、単にワイヤを電極
上に載せるしかなく、基板への接続時に外れるおそれが
あるほか、基板マウント時にワイヤの太さ分コアが浮く
ため安定しない上、太いワイヤを巻けないなどの不具合
がある。Second, in the type in which a metal electrode is directly baked on the lower surface of the core, when the electrode is peeled off by the heat of the solder or the wire is connected to the electrode, the wire is simply placed on the electrode, In addition to the possibility of disconnecting when connecting, there is a problem that the core floats by the thickness of the wire when it is mounted on the board, which is not stable and that a thick wire cannot be wound.

【０００４】その３として、電極を埋込み成形した樹脂
ベースをドラムコアの下面に接着したタイプでは、樹脂
ベース分だけ高さが高くなり、表面実装した場合のスペ
ースのコンパクト化の点で問題がある。As a third problem, in the type in which the resin base having the electrodes embedded therein is bonded to the lower surface of the drum core, the height is increased by the amount corresponding to the resin base, and there is a problem in that the space for surface mounting is reduced.

【０００５】[0005]

【発明が解決しようとする課題】本発明は上記従来技術
の欠陥に鑑み、基板との電気的に良好な接続とマウント
時の安定化、ワイヤの線径に限定されずコンパクト化を
達成できる電極付きドラムコアと該コアの量産化技術に
関連する電極体とを提供する。SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, the present invention is an electrode that can achieve a good electrical connection with a substrate, stabilization during mounting, and compactness without being restricted by the wire diameter of the wire. Provided is an attached drum core and an electrode body related to the technology for mass production of the core.

【０００６】[0006]

【課題を解決するための手段】第１発明の電極付きドラ
ムコアは、小幅短尺板と広幅長尺板を一体にＬ字状に打
ち抜いた金属板の、広幅長尺板を小幅短尺板に向けてそ
の端部から所要の長さで一面側と他面側にそれぞれ折り
曲げ重畳して形成した左右対称の一対の電極と、ドラム
コアの下面に中心線の左右に対称に該中心線と直交する
中心線上に広幅側を配し、他方を小幅としたＬ字状の凹
溝と、逆Ｌ字状の凹溝を形成したドラムコアとから成
り、前記電極の重畳側を上面にして、それぞれ左右に凹
設したドラムコアの一対の凹溝に一対の電極を接着して
成るものである。A drum core with an electrode according to a first aspect of the present invention is a metal plate obtained by punching a small-width short plate and a wide-width long plate integrally into an L-shape, with the wide-width long plate facing the small-width short plate. A pair of bilaterally symmetrical electrodes that are formed by bending and overlapping the one surface side and the other surface side with a required length from the end, and on the lower surface of the drum core, on the center line that is symmetrical to the left and right of the center line and is orthogonal to the center line. A drum core having an L-shaped concave groove with the other side having a smaller width and a smaller width on the other side, and a drum core having an inverted L-shaped concave groove formed therein. The pair of electrodes are bonded to the pair of concave grooves of the drum core.

【０００７】第２発明の電極体は小幅短尺板と広幅長尺
板を一体にしたＬ字状の所要厚の金属板から成る電極素
板と、逆Ｌ字状に同形同厚の電極素板が、小幅短尺板側
を軸線として対称に所要の間隔で配列され、左右の広幅
長尺板を小幅短尺板に向けて、その端部から所要の長さ
で一面側に折り曲げ重畳して形成した一対の電極を、小
幅短尺板の端部でリードフレームに所定のピッチで複数
対一体として成るものである。The electrode body according to the second aspect of the present invention is an electrode element plate made of an L-shaped metal plate of a required thickness in which a small width short plate and a wide width long plate are integrated, and an electrode element having the same shape and the same thickness in an inverted L shape. Plates are arranged symmetrically around the small-width short plate side as an axis at a required interval, and the left and right wide-width long plates are directed toward the small-width short plate and bent from one end to the other side with the required length to form one side. A plurality of pairs of electrodes are integrally formed on the lead frame at a predetermined pitch at the ends of the narrow and short plates.

【０００８】[0008]

【作用】ドラムコアのＬ字状の凹溝にＬ字状の電極がそ
の重畳側を上面（外面）にして嵌入接着され、電極のコ
イルリード接続部の下面と基板接続面間に所要の空間を
形成し、該空間は電極となる金属板の厚さでその高さが
増減し、ワイヤの線径の選択領域となる。The L-shaped electrode is fitted and adhered to the L-shaped groove of the drum core with the overlapping side thereof as the upper surface (outer surface), and a required space is provided between the lower surface of the coil lead connecting portion of the electrode and the substrate connecting surface. The space is formed, and its height increases or decreases depending on the thickness of the metal plate serving as an electrode, and becomes a selected area of the wire diameter of the wire.

【０００９】[0009]

【実施例】本発明を実施例により説明すると、図２に示
すように、直径８mm、高さ４mmのドラムコア１の下面に
垂直方向（一方）の中心線の左右に対称に、該中心線と
直交する水平方向（他方）の中心線上に広幅側を配し、
他方を小幅側とした深さ0.4 mmのＬ字状の凹溝２と逆Ｌ
字状の凹溝３を形成したドラムコア１に対し、図３に示
すような、前記各凹溝２、３に嵌入する幅寸法を有する
厚さ0.3 mmの小幅短尺板４と広幅長尺板５を一体にＬ字
状に打ち抜いた金属板から成る電極素板６が準備され、
ドラムコア１の右側に凹設された凹溝２には、Ｌ字状に
打ち抜いた電極素板６の広幅長尺板５をその端部から所
要の設計寸法（L/3 ）で上面側（一面側）に折り曲げ重
畳して形成した、図４に示すような右側の電極７が嵌入
されるとともに接着剤で接合され、ドラムコア１の左側
に凹設された逆Ｌ字状の凹溝３には、Ｌ字状に打ち抜い
た電極素板６の広幅長尺板５をその端部から所要の設計
寸法（L/3 ）で下面側（他面側）に折り曲げ重畳し、図
５に示す左側の電極８を天地を逆にして、すなわち、重
畳側を上面にして嵌入するとともに接着剤で接合し、十
分な接着強度を有して図１に示す状態で使用に供され
る。EXAMPLES The present invention will be described with reference to Examples. As shown in FIG. 2, the drum core 1 having a diameter of 8 mm and a height of 4 mm is symmetrical to the left and right of the center line in the vertical direction (one side) in the vertical direction (one side). Place the wide side on the center line of the horizontal direction (the other) orthogonal to each other,
L-shaped concave groove 2 with a depth of 0.4 mm with the other side narrow
As shown in FIG. 3, with respect to the drum core 1 in which the V-shaped groove 3 is formed, a small width short plate 4 and a wide width long plate 5 each having a width dimension to be fitted into each of the grooves 2 and 3 and having a thickness of 0.3 mm. An electrode base plate 6 made of a metal plate punched into an L-shape is prepared,
In the recessed groove 2 provided on the right side of the drum core 1, the wide and long plate 5 of the electrode base plate 6 punched out in an L-shape is cut from its end to the upper surface side (one surface) with a required design dimension (L / 3). The right side electrode 7 as shown in FIG. 4, which is formed by being bent and overlapped with the side), is fitted and joined with an adhesive, and is provided in the reverse L-shaped concave groove 3 provided on the left side of the drum core 1. , The wide and long plate 5 of the electrode blank 6 punched out in an L shape is bent and overlapped from its end portion to the lower surface side (other surface side) with a required design dimension (L / 3), and the left side shown in FIG. The electrode 8 is put upside down, that is, it is inserted with the overlapping side being the upper surface and bonded with an adhesive, and it is provided with sufficient adhesive strength and used in the state shown in FIG.

【００１０】このようにして成る電極付きドラムコアａ
は、図６に示すように重畳側上面（基板接続面）を下向
きにして基板９に半田付けし、小幅短尺板４の突端にコ
イルリードを接続して使用される。したがって、該突端
のコイルリード接続部の下面と基板接続面間には、本実
施例では高さ方向に0.6 mmの空間ｈが生ずるため、最大
巻線太さが0.6 mmまでのワイヤを使用して安定的に基板
９に接続することができ、しかも従来のベース方式のワ
イヤ線径0.6 mmにおける総高さ5.5 mmに対し、本実施例
では、総高さ4.5 mmであるから、高さ1.0 mm低くして同
等の性能を得ることができるものである。A drum core a with an electrode thus formed
6 is used by soldering it on the substrate 9 with the upper surface (substrate connecting surface) facing downward as shown in FIG. 6 and connecting the coil lead to the projecting end of the narrow short plate 4. Therefore, in the present embodiment, a space h of 0.6 mm is generated in the height direction between the lower surface of the coil lead connecting portion at the projecting end and the board connecting surface. Therefore, a wire having a maximum winding thickness of 0.6 mm is used. In this embodiment, the total height is 4.5 mm, whereas the total height is 5.5 mm in the conventional base system having a wire diameter of 0.6 mm, and the total height is 1.0 mm. It is possible to obtain the same performance by lowering mm.

【００１１】また、図７に示すように、Ｌ字状の電極素
板６にドラムコア１への接着強度を強化するための切欠
き１０や基板９への接続強度を強化するための切欠き１
１を広幅長尺板５の基板接続面に貫設するなどの技術を
付加することや、図８に示すように、所要厚の小幅短尺
板４と広幅長尺板５を一体にしたＬ字状の電極素板６と
逆Ｌ字状の同形同厚の電極素板１２が小幅短尺板４側を
軸線として左右に対称に所要の間隔で配列され、左右の
広幅長尺板５を仮想線で示すその切断端部１３から所要
の長さ（L/3 ）で表面側に折り曲げ重畳して形成した一
対の電極を小幅短尺板４の端部でリードフレーム１４に
所定のピッチで複数対一体として成る電極体ｂなども量
産化手段として提供される。この電極体ｂを使用する場
合は接着対象のドラムコア１が所要数所定の姿勢で治具
（図外）内にセットされ、該治具に配列されたドラムコ
ア１のそれぞれの凹溝２、３に位相を合致させて電極体
ｂをその重量側を上面にして嵌着接合し、接着剤を加熱
硬化した後、小幅短尺板４の端部をリードフレーム１４
から切り離すものである。このようにすれば、ドラムコ
ア１への電極７、８の接着作業を能率化することができ
る。Further, as shown in FIG. 7, a notch 10 for strengthening the adhesive strength to the drum core 1 in the L-shaped electrode base plate 6 and a notch 1 for strengthening the connection strength to the substrate 9.
1 is added to the board connecting surface of the wide and long plate 5, and as shown in FIG. 8, an L-shape in which the small and short plate 4 with the required thickness and the wide and long plate 5 are integrated. -Shaped electrode base plates 6 and reverse L-shaped electrode base plates 12 of the same shape and thickness are symmetrically arranged at required intervals with the small width short plate 4 side as an axis, and the left and right wide width long plates 5 are virtual. A plurality of pairs of electrodes, which are formed by bending and overlapping from the cut end 13 indicated by the line to the front surface with a required length (L / 3), are formed on the lead frame 14 at the end of the narrow strip 4 at a predetermined pitch. The integrated electrode body b and the like are also provided as mass production means. When this electrode body b is used, the required number of the drum cores 1 to be bonded are set in a jig (not shown) in a predetermined posture, and the drum cores 1 are arranged in the grooves 2 and 3 of the drum cores 1 arranged in the jig. After the electrode body b is fitted and joined so that its weight side is the upper surface and the adhesive is heat-cured, the ends of the narrow short plate 4 are connected to the lead frame 14 in phase.
Is to be separated from. By doing so, the work of adhering the electrodes 7 and 8 to the drum core 1 can be made efficient.

【００１２】[0012]

【発明の効果】本発明によれば、ドラムコアに対して十
分な接着強度を有して電極を接着できる上、接着作業の
能率化が図られ、さらに電極のコイルリード接続部の下
面と基板接続面間に所定の空間ｈが形成されるからワイ
ヤの線径の選択範囲が広域となり、安定的に表面実装で
きるほか、総高さを低くして電気的特性を同等に維持で
きるなどの効果を奏する。According to the present invention, the electrode can be adhered to the drum core with a sufficient adhesive strength, the efficiency of the adhering work can be improved, and the lower surface of the coil lead connecting portion of the electrode can be connected to the substrate. Since a predetermined space h is formed between the surfaces, the selection range of the wire diameter of the wire becomes wide, stable surface mounting is possible, and the total height can be lowered to maintain the same electrical characteristics. Play.

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

【図１】本発明に係わる電極付きドラムコアａの底面を
上向きにした状態の斜視図である。FIG. 1 is a perspective view of a drum core a with an electrode according to the present invention with a bottom surface thereof facing upward.

【図２】ドラムコアの底面図である。FIG. 2 is a bottom view of the drum core.

【図３】Ｌ字状の電極素板の平面図である。FIG. 3 is a plan view of an L-shaped electrode element plate.

【図４】図１における右側の凹溝に嵌入接着する電極の
斜視図である。FIG. 4 is a perspective view of an electrode fitted in and bonded to a groove on the right side in FIG.

【図５】図１における左側の凹溝に嵌入接着する電極の
裏面から見た斜視図である。5 is a perspective view of the electrode fitted into and bonded to the groove on the left side in FIG. 1 as viewed from the back surface.

【図６】電極付きドラムコアａを基板に接続した状態の
中央縦断面図である。FIG. 6 is a central vertical cross-sectional view showing a state in which a drum core with an electrode a is connected to a substrate.

【図７】電極素板の他の実施態様における平面図であ
る。FIG. 7 is a plan view of another embodiment of the electrode base plate.

【図８】本発明に係わる電極体ｂの部分平面図である。FIG. 8 is a partial plan view of an electrode body b according to the present invention.

【符号の説明】[Explanation of symbols]

１ ドラムコア ２ 凹溝 ３ 凹溝 ４ 小幅短尺板 ５ 広幅長尺板 ６ 電極素板 ７ 電極 ８ 電極 １０ 切欠き １１ 切欠き １２ 電極素板 １４ リードフレーム ｈ 空間 Ｌ 長尺側全長 ａ 電極付きドラムコア ｂ 電極体 1 Drum Core 2 Recessed Groove 3 Recessed Groove 4 Small Wide Short Plate 5 Wide Wide Long Plate 6 Electrode Base Plate 7 Electrode 8 Electrode 10 Notch 11 Notch 12 Electrode Base Plate 14 Lead Frame h Space L Long Side Length a Drum Core with Electrode b Electrode body

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 小幅短尺板と広幅長尺板を一体にＬ字状
に打ち抜いた所要厚の金属板から成る電極素板の、広幅
長尺板を小幅短尺板に向けて、その端部から所要の長さ
で一面側と他面側にそれぞれ折り曲げ重畳して形成した
左右対称の一対の電極と、ドラムコアの下面に中心線の
左右に対称に該中心線と直交する中心線上に広幅側を配
し、他方を小幅としたＬ字状の凹溝と、逆Ｌ字状の凹溝
を形成したドラムコアとから成り、前記電極の重畳側を
上面にして、それぞれ左右に凹設したドラムコアの一対
の凹溝に一対の電極を接着して成る電極付きドラムコ
ア。1. An electrode base plate made of a metal plate having a required thickness, which is obtained by integrally punching a small-width short plate and a wide-width long plate into an L-shape, and directing the wide-width long plate toward the small-width short plate from its end. A pair of bilaterally symmetrical electrodes formed by bending and overlapping on one surface side and the other surface side with a required length, and a wide side on the center line orthogonal to the center line on the lower surface of the drum core symmetrically to the left and right of the center line. A pair of drum cores, each of which has a small width on the other side, and a drum core having an inverted L-shaped groove formed on the other side, with the electrode overlapping side being the upper surface, and which is recessed left and right respectively. A drum core with an electrode formed by bonding a pair of electrodes to the concave groove of the. 【請求項２】 小幅短尺板と広幅長尺板を一体にしたＬ
字状の所要厚の金属板から成る電極素板と、逆Ｌ字状の
同形同厚の電極素板が、小幅短尺板側を軸線として対称
に所要の間隔で配列され、左右の広幅長尺板を小幅短尺
板に向けて、その端部から所要の長さで一面側に折り曲
げ重畳して形成した一対の電極を、小幅短尺板の端部で
リードフレームに所定のピッチで複数対一体として成る
電極体。2. An L in which a narrow short plate and a wide long plate are integrated.
An electrode base plate made of a metal plate with a required thickness and an inverted L-shaped electrode base plate with the same shape and thickness are symmetrically arranged at the required intervals with the small width short plate side as the axis line, and the left and right wide widths are wide. A pair of electrodes formed by bending the scale plate toward the small width short plate and bending and overlapping it from the end to the one side with the required length, and forming a plurality of pairs of electrodes on the lead frame at the predetermined pitch at the end of the small width plate. As an electrode body.