JPH082985Y2 - Drum core with electrodes - Google Patents

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】本考案は表面実装用の電極付きド
ラムコアに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum core with electrodes for surface mounting.

【０００２】[0002]

【従来の技術】先に本願出願人において、基板との電気
的に良好な接続と、マウント時の安定化と、ワイヤの線
径に限定されずにコンパクト化を達成すべく提案した電
極付きドラムコアと電極体（特開平５−３０４０２７号
公報所載の公開発明）は上記目的をほぼ達成するもので
あるが、接着剤が多過ぎた場合に、基板との電気的な接
続にバラツキの出る問題点を内在していたものである。2. Description of the Related Art A drum core with an electrode previously proposed by the applicant of the present application to achieve a good electrical connection with a substrate, stabilization during mounting, and compactness without being restricted by the wire diameter of the wire. And the electrode body (the publicly disclosed invention disclosed in Japanese Patent Laid-Open No. 5-304027) almost achieve the above object, but when the amount of the adhesive is too large, the electric connection with the substrate varies. The point was inherent.

【０００３】[0003]

【考案が解決しようとする課題】本考案は上記に鑑み、
接着剤の多少を問わず、基板との電気的に良好な接続を
達成できる電極付きドラムコアを提供するものである。[Problem to be solved by the present invention] In view of the above, the present invention
The present invention provides a drum core with an electrode that can achieve a good electrical connection with a substrate regardless of the amount of adhesive.

【０００４】[0004]

【課題を解決するための手段】本考案の電極付きドラム
コアは、ドラムコアと電極を接着剤で接合して成る電極
付きドラムコアにおいて、電極本体のコイルリード接続
部の上面側より下方に向けて該本体の長手方向両側の何
れか一側を開口した底面矩形の凹溝を凹設し、該凹溝の
底面に所要空間を連通して成る電極と、コア本体との下
面に対称に前記凹溝に嵌入する突起を垂設して成るドラ
ムコアとから成るものである。ここに、凹溝の底面はフ
ラットなものから網目状の凹凸を刻設したものを含む。A drum core with an electrode according to the present invention is a drum core with an electrode formed by joining a drum core and an electrode with an adhesive, the main body being downward from the upper surface side of a coil lead connecting portion of the electrode body. A concave groove having a rectangular bottom surface that is open on either side in the longitudinal direction of the core, and the bottom surface of the concave groove and the electrode formed by communicating the required space with the core body are symmetrically formed in the concave groove. And a drum core formed by vertically arranging projections to be fitted. Here, the bottom surface of the groove includes a flat surface to which mesh-like irregularities are engraved.

【０００５】[0005]

【作用】ドラムコアの突起が電極の凹溝に嵌入して両者
が接合するから、電極の基板との接合面が広範になる
上、過分な接着剤は空間に封入されるから、ハンダ接合
面が十分に確保される。また、凹溝の底面に刻設した凹
凸は接着剤の接合層を十分に確保する。[Function] Since the protrusion of the drum core fits into the groove of the electrode and joins them together, the joint surface of the electrode with the substrate becomes wide, and the excessive adhesive is sealed in the space, so that the solder joint surface is Secured enough. Further, the unevenness formed on the bottom surface of the groove sufficiently secures the adhesive bonding layer.

【０００６】[0006]

【実施例】本考案を実施例により説明すると、ドラムコ
ア１は説明の便宜上、天地を逆にした状態で図３に示す
ように、コア本体の下面２に対称に、両側の長辺３と前
後の短辺４から成る所要高さの突起５を垂設して成るも
のである。すなわち、長辺３の外方側をコア本体の外周
６と同一面に形成し、内方側を対称軸に平行に所要の間
隔を配して形成し、前後の短辺４を該対称軸に直角に同
一寸法に形成して成るものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment. For convenience of explanation, the drum core 1 is symmetrical with respect to the lower surface 2 of the core body and the front and rear long sides 3 as shown in FIG. The projections 5 having the required height, which are composed of the short sides 4 of the above, are vertically provided. That is, the outer side of the long side 3 is formed on the same plane as the outer circumference 6 of the core body, and the inner side is formed in parallel with the axis of symmetry at a required interval. It is formed to have the same size at right angles to.

【０００７】一方、電極７は図４に示すように左右対称
のものが一対準備される。すなわち、左側の電極７で説
明すると、電極本体のコイルリード接続部８の上面側よ
り下方に向けて該本体の長手方向の左方（取付け状態の
外方）を開口し、前記突起５の所要高さ（0.5 mm）の前
後の短辺４と内方側の長辺３を嵌入するに足る寸法から
成る底面矩形の凹溝９を凹設し、該凹溝９の底面に長辺
内面から右方へ貫通する縦断面横長矩形の空間１０を連
通し、かつ底面に網目状の凹凸１１を刻設して成るもの
である。On the other hand, a pair of left and right electrodes 7 are prepared as shown in FIG. That is, to explain with the left electrode 7, the left side in the longitudinal direction of the body (outer side in the attached state) is opened downward from the upper surface side of the coil lead connecting portion 8 of the electrode body, and the protrusion 5 is formed. A rectangular bottom groove 9 having a size sufficient to fit the short side 4 before and after the height (0.5 mm) and the long side 3 on the inner side is provided in the bottom surface of the groove 9 from the inner side of the long side. A space 10 having a horizontally long rectangular shape in vertical cross section is communicated with the space 10 passing rightward, and a mesh-like unevenness 11 is formed on the bottom surface.

【０００８】上記構成から成る左側の電極７は、図２に
示すように厚さ0.3 mmの電極素板１２を外形形状と凹溝
９の形成寸法に対応して打抜き、底面に連通する空間１
０を形成すべく、幅Ｗ、長さＬの穴１３を打抜くととも
に、右方の打抜き端面から穴１３に向けて幅Ｌ、深さＷ
の溝１４を掘設し、左方の打抜き穴１５の右端から凹溝
９の底面積分の範囲に渡って網目状の凹凸１１を刻設し
て成るものから折曲形成される。すなわち、先ず折曲線
Ｃを中心として右方を矢印の方向に折曲重畳し、次いで
折曲線Ｂを中心として左方を直角に折曲し、続いて折曲
線Ａを中心として前記右方の裏面側に向けて左方を矢印
の方向に折曲重畳すると、図４に示す電極７が形成され
る。なお、図４に示す右方の電極７を形成するには図２
に示す電極素板１２において、幅Ｌ、深さＷの溝１４が
裏面側に配設されたものが準備されるものである。As shown in FIG. 2, the electrode 7 on the left side having the above structure is formed by punching out an electrode base plate 12 having a thickness of 0.3 mm in accordance with the outer shape and the size of the groove 9 and communicating with the bottom surface 1
In order to form 0, a hole 13 having a width W and a length L is punched, and a width L and a depth W are obtained from the punching end face on the right side toward the hole 13.
The groove 14 is excavated, and the mesh-shaped unevenness 11 is engraved from the right end of the punched hole 15 on the left side over the range of the bottom surface integral of the groove 9. That is, first, the right side is bent and overlapped around the folding curve C in the direction of the arrow, then the left side is bent at a right angle around the folding curve B, and then the right rear surface is centered around the folding curve A. When the left side is bent and superimposed in the direction of the arrow toward the side, the electrode 7 shown in FIG. 4 is formed. In order to form the right electrode 7 shown in FIG.
In the electrode base plate 12 shown in (1), a groove 14 having a width L and a depth W is provided on the back surface side.

【０００９】このようにして成るドラムコア１と電極７
は図１に示すように該ドラムコア１の左右それぞれの突
起５を左右それぞれの電極本体の凹溝９に嵌入し、該凹
溝９の底面に塗布された接着剤１６で相互を接合するも
のであるが、該底面における接着剤１６は凹凸１１に噛
み込んで接合層は安定的に確保されるとともに、過分な
接着剤１６は突起５の嵌入時に空間１０に追込まれ、凹
溝９の開口側には微量の接着剤１６が滲む程度で、ハン
ダの接合面は十分に確保されるから、基板との接合にバ
ラツキが出ず、電気的に安定した表面実装が得られる。The drum core 1 and the electrode 7 thus constructed
As shown in FIG. 1, the left and right protrusions 5 of the drum core 1 are fitted into the recessed grooves 9 of the left and right electrode bodies, respectively, and they are joined together by an adhesive 16 applied to the bottom surface of the recessed grooves 9. However, the adhesive 16 on the bottom surface is caught in the unevenness 11 to stably secure the bonding layer, and the excessive adhesive 16 is driven into the space 10 when the protrusion 5 is fitted, and the opening of the concave groove 9 is formed. Since only a small amount of the adhesive 16 bleeds on the side, the bonding surface of the solder is sufficiently secured, so that there is no variation in bonding with the substrate, and electrically stable surface mounting can be obtained.

【００１０】また、図５、図６に示したものは、本考案
の他の実施態様におけるドラムコア１と電極７を示すも
のであり、この場合のドラムコア１の該電極７との接合
に関与する突起５はコア本体の下面２の内部にあり、電
極７に配設する凹溝９の開口側はコア本体の内方に向け
られ、しかも過分な接着剤１６を封入する空間１０は該
凹溝９の開口側にのみ開口し、電極７の外方側となる面
には貫通していないから、ハンダの接合面は外方側全面
となり、基板との接合はより安定したものとなることは
明白である。なお、実装高さの観点からは、コア本体の
下方のフランジにおける必要厚さを一定とした場合に、
該フランジの下面２に凹設した凹溝に電極を嵌入する場
合に比して、本考案のように該下面２に垂設した突起５
を電極７の凹溝９に嵌入する方が、電極７の基板との接
続底面からの全高を短縮できる利点を有するものであ
る。Further, FIGS. 5 and 6 show a drum core 1 and an electrode 7 in another embodiment of the present invention, which are involved in joining the drum core 1 to the electrode 7 in this case. The protrusion 5 is inside the lower surface 2 of the core body, the opening side of the concave groove 9 provided in the electrode 7 is directed to the inside of the core body, and the space 10 for enclosing the excessive adhesive 16 is the concave groove. Since it is opened only on the opening side of 9 and does not penetrate the surface on the outer side of the electrode 7, the solder bonding surface is the entire outer surface, and the bonding with the substrate is more stable. It's obvious. From the viewpoint of mounting height, when the required thickness of the flange below the core body is constant,
As compared with the case where the electrode is fitted in the groove formed in the lower surface 2 of the flange, the projection 5 vertically provided on the lower surface 2 as in the present invention.
It is advantageous to fit the groove into the groove 9 of the electrode 7 because the total height of the electrode 7 from the bottom surface for connection with the substrate can be shortened.

【００１１】[0011]

【考案の効果】以上のように本考案の電極付きドラムコ
アによれば、電極における基板とのハンダによる接合面
が十分に確保されるとともに、過分な接着剤を接着面に
連通する空間に封入できるから、該接着剤の多少を問わ
ず、基板との電気的に良好な接続を極めて簡易にかつ安
定的に提供できる効果を奏するほか、実装上の全高を短
縮できる波及効果をも呈する。As described above, according to the drum core with an electrode of the present invention, the bonding surface of the electrode by soldering with the substrate is sufficiently secured, and an excessive adhesive can be enclosed in the space communicating with the bonding surface. Therefore, regardless of the amount of the adhesive, it is possible to provide an electrically favorable connection to the substrate extremely easily and stably, and also to exert a ripple effect of reducing the total mounting height.

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

【図１】本考案に係る電極付きドラムコアａの一側面図
である。FIG. 1 is a side view of a drum core a with an electrode according to the present invention.

【図２】電極素板の展開図である。FIG. 2 is a development view of an electrode base plate.

【図３】天地を逆にした状態のドラムコアの斜視図であ
る。FIG. 3 is a perspective view of the drum core in an upside-down state.

【図４】両電極の斜視図である。FIG. 4 is a perspective view of both electrodes.

【図５】本考案の他の実施態様における天地を逆にした
状態のドラムコアの斜視図である。FIG. 5 is a perspective view of a drum core in an upside-down state according to another embodiment of the present invention.

【図６】同上ドラムコアに接合する電極の斜視図であ
る。FIG. 6 is a perspective view of an electrode joined to the same drum core.

【符号の説明】[Explanation of symbols]

１ ドラムコア ２ 下面 ５ 突起 ７ 電極 ８ コイルリード接続部 ９ 凹溝 １０ 空間 １１ 凹凸 １２ 電極素板 １３ 穴 １４ 溝 １５ 打抜き穴 ａ 電極付きドラムコア 1 Drum core 2 Lower surface 5 Protrusion 7 Electrode 8 Coil lead connecting part 9 Recessed groove 10 Space 11 Unevenness 12 Electrode base plate 13 Hole 14 Groove 15 Punching hole a Drum core with electrode

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】 電極本体のコイルリード接続部の上面側
より下方に向けて該本体の長手方向両側の何れか一側を
開口した底面矩形の凹溝を凹設し、該凹溝の底面に所要
空間を連通して成る電極と、コア本体の下面に対称に前
記凹溝に嵌入する突起を垂設して成るドラムコアとから
成り、該凹溝において接着剤で両者を接合するととも
に、余分な接着剤を前記空間に封入し、電極において基
板とのハンダ接合面を十分に確保できることを特徴とし
た電極付きドラムコア。1. An electrode main body is provided with a bottom rectangular recessed groove which opens downward on either side of the longitudinal direction of the main body from the upper surface side of the coil lead connection portion, and the bottom of the recessed groove is formed. It is composed of an electrode communicating with a required space, and a drum core formed by vertically arranging symmetrically a projection fitted into the concave groove on the lower surface of the core body. A drum core with an electrode, wherein an adhesive is enclosed in the space, and a solder joint surface with a substrate can be sufficiently secured in the electrode. 【請求項２】 凹溝の底面に網目状の凹凸を刻設して成
る請求項１記載の電極付きドラムコア。2. The drum core with an electrode according to claim 1, wherein the bottom surface of the groove is engraved with mesh-shaped irregularities.