JP3780850B2 - Electromagnetic device - Google Patents

Electromagnetic device Download PDF

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Publication number
JP3780850B2
JP3780850B2 JP2001012224A JP2001012224A JP3780850B2 JP 3780850 B2 JP3780850 B2 JP 3780850B2 JP 2001012224 A JP2001012224 A JP 2001012224A JP 2001012224 A JP2001012224 A JP 2001012224A JP 3780850 B2 JP3780850 B2 JP 3780850B2
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Prior art keywords
ferrite core
electromagnetic device
coil winding
joint member
extending
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JP2002217050A (en
Inventor
健一 ▲高▼松
孝明 忠澤
英典 掛橋
智之 中野
昌紀 佐藤
和彦 絹谷
隆雄 宮井
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Priority to JP2001012224A priority Critical patent/JP3780850B2/en
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to CNB018027628A priority patent/CN1181509C/en
Priority to EP01965666A priority patent/EP1324357A4/en
Priority to AU2001286255A priority patent/AU2001286255A1/en
Priority to US10/129,105 priority patent/US7142082B2/en
Priority to PCT/JP2001/008022 priority patent/WO2002023561A1/en
Publication of JP2002217050A publication Critical patent/JP2002217050A/en
Priority to US11/009,152 priority patent/US20050104698A1/en
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Publication of JP3780850B2 publication Critical patent/JP3780850B2/en
Priority to US11/548,353 priority patent/US7394340B2/en
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Description

【０００１】
【発明の属する技術分野】
本発明は、高圧放電灯の始動装置など高圧パルス電圧を発生するための電磁装置に関するものである。
【０００２】
【従来の技術】
図５（ａ）は従来の電磁装置の斜視図、（ｂ）は（ａ）のＡ−Ａ’線から見た断面図である。この図に示す電磁装置は、高固有抵抗を有する棒状のフェライトコア（例えばＮｉＺｎ）３PAと、このフェライトコア３PAの側面に捲き回される２次巻線としてのコイル巻線２とにより構成されている。この構成において、コイル巻線２は、小型化のため、占積率のよい箔状の平角線をフェライトコア３PAの側面にエッジワイズ巻きにすることで構成され、小型化および低コスト化のため、ボビンを使用することなく、フェライトコア３PAの側面に直接捲き回されている。このようにフェライトコア３PAの側面にコイル巻線２を直接捲き回すために、フェライトコア３PAの両端面の各々に底部を有する穴３１PAが形成され、これらの穴３１PAは、巻回しの軸方向の位置決め用として使用されている。
【０００３】
ここで、図６に底部を有する穴が両端面の各々に形成された棒状のフェライトコアの製造手順の説明図を示す。フェライトコア３PAの製造には、図６に示すように、穴３１PAを形成する突起Ｋ１’を有する一対の杵Ｋと、これら一対の杵Ｋが挿通される貫通孔Ｕ１を有する臼Ｕとの打錠金型が使用される。まず、図６（ａ）のように臼Ｕおよび杵Ｋでフェライトコア３PAを形作る。この後、図６（ｂ）のように、下方の杵Ｋを臼Ｕの上部まで押し上げ、フェライトコア３PAを図中の矢印のように倒して打錠金型から引き抜く。これにより、フェライトコア３PAが得られる。
【０００４】
図８は絶縁被覆電線と溶接される従来の溶接継手部材の模式図である。絶縁被覆を予め除去することなく、絶縁被覆電線と溶接される溶接継手部材６PAは、図８に示すように、１つの導電部材を用いて、一の方向に伸びる平板状の基部６１と、この基部６１における上記一の方向に沿った一の縁部から延出して一の方向と直交する方向に延びる折り返し部６２とを、互いに対面させるようにその折り返し部が延出する部分６３で屈曲した形状に形成されている。この溶接継手部材６PAの構造は、上記電磁装置の例えば端子６に適用される。なお、この種に属する接続構造は例えば特開平１１−１１４６７４号公報に記載されている。
【０００５】
【発明が解決しようとする課題】
しかしながら、フェライトコア３PAの両端面の各穴３１PAは、図６に示した杵Ｋの円柱状の突起Ｋ１’によって形成されるので、図７に示すように、フェライトコア３PAがその小口の縁部Ｐ１を支点に倒れると、杵Ｋの突起Ｋ１’の角でフェライトコア３PAの穴３１PAの開口側における領域Ｒ１の部分が欠けるという課題があった。
【０００６】
さらに、従来の溶接継手部材６PAの構造では、溶接しようとする絶縁被覆電線を基部６１と折り返し部６２との間に挟んで溶接電極で加圧したとき、絶縁被覆電線が位置ずれを起こし、絶縁被覆電線が基部６１と折り返し部６２との間から完全に外れてしまうことがあり、絶縁被覆電線を溶接継手部材に安定的に溶接することができなかった。このため、安定的かつ耐久信頼性に優れた接続状態が得られる溶接継手部材が求められる。
【０００７】
本発明は、上記事情に鑑みてなされたものであり、フェライトコアの両端面の各々に形成される穴を欠けないようにし得る電磁装置を提供することを目的とする。
【０００８】
【課題を解決するための手段】
上記課題を解決するための請求項１記載の発明は、棒状のフェライトコアと、このフェライトコアの側面に捲き回されるコイル巻線とにより構成される電磁装置であって、前記フェライトコアの両端面の各々には底部を有する穴が形成され、この穴は開口部から底部にかけて寸法が徐々に小さくなるテーパー状に形成されるとともに、絶縁被覆電線と接続される溶接継手部材が設けられ、この溶接継手部材は、一の方向に伸びる平板状の基部と、この基部における前記一の方向に沿った一の縁部から延出して前記一の方向と直交する方向に延びる折り返し部とを、互いに対面させるようにその折り返し部が延出する部分で屈曲した形状に形成され、前記基部における前記一の方向に沿った他の縁部から延出する一部が折り返されて位置ずれ防止部を形成し、前記位置ずれ防止部の前記基部からの折り返し寸法は、前記絶縁被覆電線の線径と同じかそれよりも大きく、前記位置ずれ防止部は前記折り返し部と離間していることを特徴とする。
【０００９】
請求項２記載の発明は、請求項１記載の電磁装置において、前記フェライトコアは１０３Ωｍ以上の固有抵抗を有していることを特徴とする。
【００１０】
請求項３記載の発明は、請求項１または２記載の電磁装置において、前記コイル巻線は平角線をエッジワイズに捲き回して成ることを特徴とする。
【００１１】
請求項４記載の発明は、請求項３記載の電磁装置において、前記コイル巻線は、絶縁部材を介さずに前記フェライトコアの側面に直接捲き回されていることを特徴とする。
【００１２】
請求項５記載の発明は、請求項４記載の電磁装置において、前記フェライトコアは楕円状の断面形状に形成されていることを特徴とする。
【００１３】
【発明の実施の形態】
図１は電磁装置の構成図、図２は図１のフェライトコアの両端面の各々に形成される穴形状の説明図であり、これらの図を用いて本発明の第１実施形態について説明する。
【００１４】
図１に示す電磁装置は、１０３Ωｍ以上の固有抵抗を有する棒状のロッド型のフェライトコア３と、このフェライトコア３の側面に、絶縁部材としてのボビンを使用しないで平角線を１層にエッジワイズ巻きにして成るコイル巻線２と、芯線を絶縁被覆で覆った絶縁被覆電線であって、コイル巻線２の上層に捲き回されるコイル巻線１と、これらを収納する樹脂製のケース５と、このケース５から突出し各コイル巻線に接続される複数の端子６とにより構成されている。
【００１５】
この構成では、コイル巻線１，２がボビンを介さずにフェライトコア３の側面に直接捲き回されので、各端子６をボビンに固定することができない。そこで、第１実施形態では、図１（ｃ）に示すように、各端子６を一体に有するフープ材６０が使用される。この場合、フープ材６０の各端子６に、対応するコイル巻線の端部が接合されることになる。ここで、図１（ａ）に示すように、全ての端子６を同一方向に引き出すことにより、フープ材６０を簡単な形状で形成でき、図１（ｂ）に示すように、樹脂を充填ないし成型して電気的絶縁等のためのケース５を形成した場合でも、各端子６が一列に配列されるため、次工程での接合が容易になる。
【００１６】
また、第１実施形態では、図２に示すように、フェライトコア３の両端面の各々には底部３１ｂを有する穴３１が形成され、この穴３１は開口部３１ａから底部３１ｂにかけて寸法が徐々に小さくなるテーパー状に形成されている。すなわち、フェライトコア３の製造において、図６に示した杵に代えて、側面がテーパー状になった突起Ｋ１を有する杵Ｋが使用されるのである。これにより、フェライトコア３がその端面の縁部Ｐ１を支点に倒れるとき、支点Ｐ１を中心に回動する穴３１の開口縁部の位置Ｐ２の支点Ｐ１からの半径が、杵Ｋの突起Ｋ１の凸面縁部における位置Ｐ３の支点Ｐ１からの半径よりも長くなって、穴３１の開口部３１ａが杵Ｋの突起Ｋ１の角に当たらなくなるので、フェライトコア３の両端面の各々に形成される穴３１を欠けないようにすることができる。
【００１７】
次に、図３に示す溶接継手部材７は、例えば端子６として、上記電磁装置に使用される１次巻線用の絶縁被覆電線８と接続されるものであり、一の方向（図では斜め右上の方向）に伸びる平板状の基部７１と、この基部７１における一の方向に沿った一の縁部から延出して一の方向と直交する方向に延びる板状の折り返し部７２とを、互いに対面させるように折り返し部７２が延出する部分７３で屈曲した形状に形成されており、基部７１における一の方向に沿った他の縁部から延出する板状の一部が上方に折り返されて位置ずれ防止部７４を形成している。この位置ずれ防止部７４の基部７１からの折り返し寸法は、絶縁被覆電線８の線径と同じかそれよりも大きい寸法に設定されている。また、位置ずれ防止部７４は折り返し部７２と離間する位置に設けられている。
【００１８】
このような構造の溶接継手部材７を用いれば、溶接電極で加圧したときに、絶縁被覆電線８が位置ずれにより溶接継手部材７から外れることがなくなり、安定的かつ耐久信頼性に優れた接続状態が得られる。また、位置ずれ防止部７４の基部７１からの折り返し寸法は、溶接しようとする絶縁被覆電線８の線径と同じかそれよりも大きいので、絶縁被覆電線８が位置ずれしてもその位置ずれが位置ずれ防止部７４の位置で確実に止まるから、絶縁被覆電線８が位置ずれにより溶接継手部材７から外れるのを確実に防止することができる。さらに、位置ずれ防止部７４は折り返し部７２と離間する位置に設けられているので、位置ずれ防止部７４と折り返し部７２との短絡を防止して、通電時、折り返し部７２が延出する部分７３で確実にジュール発熱させることができる。
【００１９】
図４は電磁装置におけるフェライトコアを示す図であり、この図を用いて本発明の第２実施形態について説明する。
【００２０】
本電磁装置は、図４に示すように、第１実施形態と同様の穴３１を両端面の各々に有し、楕円状の断面形状に形成されたフェライトコア３Ａを、第１実施形態のフェライトコア３に代えて備える以外は第１実施形態の電磁装置と同様に構成される。
【００２１】
このような扁平のフェライトコア３Ａを使用することにより、薄型のトランス構成の電磁装置を作製することができる。
【００２２】
なお、図４の例では、穴３１内の周壁面の全体がテーパー面になっているが、フェライトコアは、断面形状が楕円状である場合、図４（ｂ）に示す矢印の方向に倒れ難く、図４（ｃ）に示す矢印の方向に倒れ易くなるので、フェライトコアの端面の長手方向と直交する方向において、穴３１の欠けを防止するためのテーパー面を少なくとも設ければよい。
【００２３】
【発明の効果】
以上のことから明らかなように、請求項１記載の発明は、棒状のフェライトコアと、このフェライトコアの側面に捲き回されるコイル巻線とにより構成される電磁装置であって、前記フェライトコアの両端面の各々には底部を有する穴が形成され、この穴は開口部から底部にかけて寸法が徐々に小さくなるテーパー状に形成されているので、例えば一対の杵および臼の打錠金型でフェライトコアを作製する場合、フェライトコアの穴にこれを形成する杵の突起が填った状態でフェライトコアがこの端面の縁部を回動中心にして倒れたとしても、穴の開口部が杵の突起の角に当たらなくなるから、フェライトコアの両端面の各々に形成される穴を欠けないようにすることができる。
【００２４】
また、絶縁被覆電線と接続される溶接継手部材が設けられ、この溶接継手部材は、一の方向に伸びる平板状の基部と、この基部における前記一の方向に沿った一の縁部から延出して前記一の方向と直交する方向に延びる折り返し部とを、互いに対面させるようにその折り返し部が延出する部分で屈曲した形状に形成され、前記基部における前記一の方向に沿った他の縁部から延出する一部が折り返されて位置ずれ防止部を形成しているので、溶接電極で加圧したときに、絶縁被覆電線が位置ずれにより溶接継手部材から外れることがなくなり、安定的かつ耐久信頼性に優れた接続状態が得られる。
【００２５】
また、前記位置ずれ防止部の前記基部からの折り返し寸法は、前記絶縁被覆電線の線径と同じかそれよりも大きいので、絶縁被覆電線が位置ずれしてもその位置ずれが位置ずれ防止部の位置で確実に止まるから、絶縁被覆電線が位置ずれにより溶接継手部材から外れるのを確実に防止することができる。
【００２６】
また、前記位置ずれ防止部は前記折り返し部と離間しているので、位置ずれ防止部と折り返し部との短絡を防止して、通電時、折り返し部が延出する部分で確実にジュール発熱させることができる。
【００２７】
請求項２記載の発明によれば、請求項１記載の電磁装置において、前記フェライトコアは１０３Ωｍ以上の固有抵抗を有しており、この場合も、フェライトコアの両端面の各々に形成される穴を欠けないようにすることができる。
【００２８】
請求項３記載の発明によれば、請求項１または２記載の電磁装置において、前記コイル巻線は平角線をエッジワイズに捲き回して成るので、小型化が可能になる。
【００２９】
請求項４記載の発明によれば、請求項３記載の電磁装置において、前記コイル巻線は、絶縁部材を介さずに前記フェライトコアの側面に直接捲き回されているので、小型化および低コスト化が可能になる。
【００３０】
請求項５記載の発明によれば、請求項４記載の電磁装置において、前記フェライトコアは楕円状の断面形状に形成されているので、薄型化が可能になる。
【図面の簡単な説明】
【図１】 電磁装置の構成図である。
【図２】 図１のフェライトコアの両端面の各々に形成される穴形状の説明図である。
【図３】 溶接継手部材を示す図である。
【図４】 電磁装置におけるフェライトコアを示す図である。
【図５】 従来の電磁装置の斜視図および断面図である。
【図６】 底部を有する穴が両端面の各々に形成された棒状のフェライトコアの製造手順の説明図である。
【図７】 図５におけるフェライトコアの課題の説明図である。
【図８】 絶縁被覆電線と溶接される従来の溶接継手部材の模式図である。
【符号の説明】
１ コイル巻線
２ コイル巻線
３，３Ａ フェライトコア
３１ 穴
５ ケース
６ 端子
７ 溶接継手部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic equipment for generating a high-voltage pulse, such as the starting device of the high pressure discharge lamp.
[0002]
[Prior art]
FIG. 5A is a perspective view of a conventional electromagnetic device, and FIG. 5B is a sectional view taken along line AA ′ in FIG. The electromagnetic device shown in this figure is composed of a rod-shaped ferrite core (for example, NiZn) 3PA having a high specific resistance and a coil winding 2 as a secondary winding wound around the side surface of the ferrite core 3PA. Yes. In this configuration, the coil winding 2 is configured by forming a foil-shaped rectangular wire having a good space factor on the side surface of the ferrite core 3PA in an edgewise manner for the purpose of size reduction and cost reduction. It is wound directly on the side of the ferrite core 3PA without using a bobbin. Thus, in order to wind the coil winding 2 directly on the side surface of the ferrite core 3PA, holes 31PA having bottoms are formed on both end faces of the ferrite core 3PA, and these holes 31PA are arranged in the axial direction of winding. Used for positioning.
[0003]
Here, FIG. 6 shows an explanatory diagram of a manufacturing procedure of a rod-shaped ferrite core in which holes having bottoms are formed on both end faces. For manufacturing the ferrite core 3PA, as shown in FIG. 6 , a pair of ridges K having a protrusion K1 ′ forming a hole 31PA and a die U having a through hole U1 through which the pair of ridges K are inserted. A lock mold is used. First, as shown in FIG. 6 (a), a ferrite core 3PA is formed with a mortar U and a ridge K. Thereafter, as shown in FIG. 6B, the lower punch K is pushed up to the upper part of the die U, and the ferrite core 3PA is tilted as shown by the arrow in the drawing to be pulled out of the tableting die. Thereby, the ferrite core 3PA is obtained .
[0004]
FIG. 8 is a schematic diagram of a conventional welded joint member welded to an insulated coated electric wire. A welded joint member 6PA to be welded to the insulated wire without removing the insulation coating in advance is a flat base 61 extending in one direction using one conductive member as shown in FIG. A folded portion 62 extending from one edge portion along the one direction in the base portion 61 and extending in a direction orthogonal to the one direction is bent at a portion 63 where the folded portion extends so as to face each other. It is formed into a shape. The structure of the welded joint member 6PA is applied to, for example, the terminal 6 of the electromagnetic device. A connection structure belonging to this type is described in, for example, Japanese Patent Application Laid-Open No. 11-114674.
[0005]
[Problems to be solved by the invention]
However, each hole 31PA on both end faces of the ferrite core 3PA is formed by the columnar protrusion K1 ′ of the ridge K shown in FIG. 6 , so that the ferrite core 3PA has an edge of its fore edge as shown in FIG. When falling the P1 a fulcrum, there is a problem that the corner projections K1 'pestle K lacks the portion of the region R1 at the opening side of the hole 31PA ferrite core 3PA.
[0006]
Furthermore, in the structure of the conventional welded joint member 6PA, when the insulation-coated electric wire to be welded is sandwiched between the base 61 and the folded portion 62 and pressed with the welding electrode, the insulation-coated electric wire is displaced and insulated. The covered electric wire may be completely removed from between the base portion 61 and the folded portion 62, and the insulating covered electric wire could not be stably welded to the welded joint member. For this reason, the welded joint member from which the stable connection state excellent in durability reliability is obtained is calculated | required.
[0007]
The present invention has been made in view of the above circumstances, and an object thereof is to provide an electromagnetic device capable of preventing a hole formed in each of both end faces of a ferrite core from being lost .
[0008]
[Means for Solving the Problems]
The invention according to claim 1 for solving the above-mentioned problems is an electromagnetic device comprising a rod-shaped ferrite core and a coil winding wound around a side surface of the ferrite core, and both ends of the ferrite core. to each of the surfaces is formed a hole having a bottom, the hole is tapered in size toward the bottom from the opening gradually decreases Rutotomoni, welded joint member is provided to be connected to the insulated wire, the The welded joint member includes a flat base portion extending in one direction and a folded portion extending from one edge portion along the one direction in the base portion and extending in a direction perpendicular to the one direction. It is formed in a shape bent at the portion where the folded portion extends so as to face each other, and a portion extending from the other edge portion along the one direction in the base portion is folded back to prevent misalignment. Part is formed, folded dimension from the base of the displacement prevention portion, the same as or greater than the wire diameter of the insulation coated wire, said displacement prevention portion which is spaced apart from the folded portion Features.
[0009]
The invention according to claim 2 is the electromagnetic device according to claim 1, wherein the ferrite core has a specific resistance of 10 3 Ωm or more.
[0010]
According to a third aspect of the present invention, in the electromagnetic device according to the first or second aspect, the coil winding is formed by winding a rectangular wire edgewise.
[0011]
According to a fourth aspect of the present invention, in the electromagnetic device according to the third aspect, the coil winding is directly wound around a side surface of the ferrite core without using an insulating member.
[0012]
According to a fifth aspect of the present invention, in the electromagnetic device according to the fourth aspect, the ferrite core is formed in an elliptical cross-sectional shape .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a configuration diagram of an electromagnetic device, and FIG. 2 is an explanatory diagram of hole shapes formed in both end faces of the ferrite core of FIG. 1, and a first embodiment of the present invention will be described using these drawings. .
[0014]
Electromagnetic apparatus shown in Figure 1, the ferrite core 3 of a rod-type bar-shaped having a resistivity of more than 10 3 [Omega] m, the side surfaces of the ferrite core 3, the rectangular wire in one layer without using bobbins of the insulating member A coil winding 2 formed by edgewise winding, an insulation-coated electric wire whose core wire is covered with an insulation coating, a coil winding 1 wound around an upper layer of the coil winding 2, and a resin-made housing for housing them The case 5 is composed of a plurality of terminals 6 protruding from the case 5 and connected to the coil windings.
[0015]
In this configuration, since the coil windings 1 and 2 are directly wound around the side surface of the ferrite core 3 without using a bobbin, each terminal 6 cannot be fixed to the bobbin. Therefore, in the first embodiment, as shown in FIG. 1C, a hoop material 60 having the terminals 6 integrally is used. In this case, the end of the corresponding coil winding is joined to each terminal 6 of the hoop material 60. Here, as shown in FIG. 1A, by pulling out all the terminals 6 in the same direction, the hoop material 60 can be formed in a simple shape, and as shown in FIG. Even when the case 5 for electrical insulation or the like is formed by molding, since the terminals 6 are arranged in a line, the joining in the next process becomes easy.
[0016]
Further, in the first embodiment, as shown in FIG. 2, a hole 31 having a bottom 31b is formed on each of both end faces of the ferrite core 3, and the size of the hole 31 gradually increases from the opening 31a to the bottom 31b. It is formed in a tapered shape that becomes smaller. That is, in the production of the ferrite core 3, instead of the punch shown in FIG. 6 is the punch K having a protrusion K1 in which the side surface is tapered is used. Thereby, when the ferrite core 3 falls on the edge P1 of its end surface as a fulcrum, the radius from the fulcrum P1 at the position P2 of the opening edge of the hole 31 rotating around the fulcrum P1 is Since the opening 31a of the hole 31 does not come into contact with the corner of the protrusion K1 of the flange K because it becomes longer than the radius from the fulcrum P1 at the position P3 at the convex edge, the holes formed in both end faces of the ferrite core 3 31 can be omitted.
[0017]
Next, the welded joint member 7 shown in FIG. 3 is connected, for example, as a terminal 6 to an insulation-coated electric wire 8 for a primary winding used in the electromagnetic device, and is in one direction (in the drawing, diagonally). A flat plate-like base portion 71 extending in the upper right direction) and a plate-like folded portion 72 extending from one edge portion along one direction in the base portion 71 and extending in a direction perpendicular to the one direction, The folded portion 72 is formed to be bent at a portion 73 where the folded portion 72 extends so as to face each other, and a part of the plate shape extending from the other edge portion along one direction in the base portion 71 is folded upward. Thus, a misalignment prevention portion 74 is formed. The return dimension from the base 71 of the misregistration prevention part 74 is set to be the same as or larger than the wire diameter of the insulating coated electric wire 8. Further, the misregistration prevention unit 74 is provided at a position separated from the folded portion 72.
[0018]
When the welded joint member 7 having such a structure is used, the insulation-coated electric wire 8 does not come off from the welded joint member 7 due to displacement when pressurized with a welding electrode, and the connection is stable and has excellent durability and reliability. A state is obtained. Moreover, since the return dimension from the base 71 of the misalignment prevention portion 74 is the same as or larger than the wire diameter of the insulation coated electric wire 8 to be welded, even if the insulation coated electric wire 8 is misaligned, the misalignment is not caused. Since it stops reliably in the position of the position shift prevention part 74, it can prevent reliably that the insulation coating electric wire 8 remove | deviates from the welded joint member 7 by position shift. Further, since the misalignment prevention unit 74 is provided at a position separated from the folded portion 72, a short circuit between the misalignment preventing portion 74 and the folded portion 72 is prevented and the folded portion 72 extends when energized. 73 can surely generate Joule heat.
[0019]
FIG. 4 is a diagram showing a ferrite core in an electromagnetic device, and a second embodiment of the present invention will be described with reference to this figure.
[0020]
As shown in FIG. 4 , the electromagnetic device includes a ferrite core 3 </ b> A having holes 31 similar to those of the first embodiment on both end surfaces and having an elliptical cross-sectional shape. The electromagnetic device is configured in the same manner as the electromagnetic device of the first embodiment except that the core 3 is provided.
[0021]
By using such a flat ferrite core 3A, a thin electromagnetic device having a transformer structure can be manufactured.
[0022]
In the example of FIG. 4, the whole of the peripheral wall surface of the hole 31 is a tapered surface, the ferrite core, when the cross-sectional shape is elliptical, collapse in the direction of the arrow shown in FIG. 4 (b) hard, so easily fall in the direction of the arrow shown in FIG. 4 (c), in the direction perpendicular to the longitudinal direction of the end face of the ferrite core it may be provided at least a tapered surface for preventing chipping of the hole 31.
[0023]
【The invention's effect】
As is apparent from the above, the invention described in claim 1 is an electromagnetic device including a rod-shaped ferrite core and a coil winding wound around a side surface of the ferrite core, and the ferrite core A hole having a bottom portion is formed on each of both end faces of the, and the hole is formed in a tapered shape whose size gradually decreases from the opening portion to the bottom portion. When producing a ferrite core, even if the ferrite core falls down with the edge of the end face pivoted in the state where the ferrite core hole is inserted in the ferrite core hole, the opening of the hole is Therefore, the holes formed in both end faces of the ferrite core can be prevented from being lost.
[0024]
Further, a welded joint member connected to the insulated coated electric wire is provided, and the welded joint member extends from a flat base portion extending in one direction and one edge portion in the base portion along the one direction. The folded portion extending in the direction orthogonal to the one direction is formed in a shape bent at the portion where the folded portion extends so as to face each other, and the other edge along the one direction in the base portion Since the part extending from the part is folded back to form the position shift prevention part, when pressurized with the welding electrode, the insulation-coated electric wire is not detached from the welded joint member due to the position shift, and stable and A connection state with excellent durability and reliability can be obtained.
[0025]
In addition, since the return dimension of the misalignment prevention portion from the base is the same as or larger than the wire diameter of the insulation-coated electric wire, even if the insulation-coated electric wire is misaligned, the misalignment of the misalignment prevention portion Since it stops reliably in a position, it can prevent reliably that an insulation covering electric wire remove | deviates from a welded joint member by position shift.
[0026]
In addition, since the misregistration prevention unit is separated from the folded portion, the short circuit between the misregistration preventing unit and the folded portion is prevented, and when energized, Joule heating is surely generated at the portion where the folded portion extends. Can do.
[0027]
According to a second aspect of the present invention, in the electromagnetic device according to the first aspect, the ferrite core has a specific resistance of 10 3 Ωm or more, and also in this case, the ferrite core is formed on each of both end faces of the ferrite core. It is possible to prevent missing holes.
[0028]
According to a third aspect of the present invention, in the electromagnetic device according to the first or second aspect, since the coil winding is formed by winding a rectangular wire edgewise, the size can be reduced.
[0029]
According to a fourth aspect of the present invention, in the electromagnetic device according to the third aspect, the coil winding is directly wound around the side surface of the ferrite core without using an insulating member. Can be realized.
[0030]
According to the fifth aspect of the present invention, in the electromagnetic device according to the fourth aspect, since the ferrite core is formed in an elliptical cross-sectional shape, the thickness can be reduced .
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an electromagnetic device.
2 is an explanatory diagram of a hole shape formed in each of both end faces of the ferrite core of FIG. 1. FIG.
3 is a diagram showing a weld joint member.
FIG. 4 is a diagram showing a ferrite core in an electromagnetic device.
FIG. 5 is a perspective view and a cross-sectional view of a conventional electromagnetic device.
FIG. 6 is an explanatory diagram of a manufacturing procedure of a rod-shaped ferrite core in which a hole having a bottom is formed on each of both end faces.
7 is an explanatory diagram of a problem of the ferrite core in FIG.
FIG. 8 is a schematic view of a conventional welded joint member welded to an insulated coated electric wire.
[Explanation of symbols]
1 coil winding 2 coil windings 3,3A ferrite core 31 holes
5 cases
6 Terminal 7 Welded joint member

Claims (5)

棒状のフェライトコアと、このフェライトコアの側面に捲き回されるコイル巻線とにより構成される電磁装置であって、前記フェライトコアの両端面の各々には底部を有する穴が形成され、この穴は開口部から底部にかけて寸法が徐々に小さくなるテーパー状に形成されるとともに、絶縁被覆電線と接続される溶接継手部材が設けられ、この溶接継手部材は、一の方向に伸びる平板状の基部と、この基部における前記一の方向に沿った一の縁部から延出して前記一の方向と直交する方向に延びる折り返し部とを、互いに対面させるようにその折り返し部が延出する部分で屈曲した形状に形成され、前記基部における前記一の方向に沿った他の縁部から延出する一部が折り返されて位置ずれ防止部を形成し、前記位置ずれ防止部の前記基部からの折り返し寸法は、前記絶縁被覆電線の線径と同じかそれよりも大きく、前記位置ずれ防止部は前記折り返し部と離間していることを特徴とする電磁装置。An electromagnetic device comprising a rod-shaped ferrite core and a coil winding wound around the side surface of the ferrite core, each of the both end surfaces of the ferrite core being formed with holes having bottom portions. Rutotomoni be tapered to the dimensions toward the bottom from the opening portion gradually decreases, the welding joint member connected to the insulated wire is provided, the weld joint member includes a flat plate-shaped base portion extending in one direction The bent portion extending from the one edge portion along the one direction in the base portion and extending in the direction orthogonal to the one direction is bent at a portion where the folded portion extends so as to face each other. A portion that is formed in a shape and extends from the other edge portion along the one direction in the base portion is folded back to form a misregistration prevention portion, and from the base portion of the misregistration prevention portion. Bend dimension, the insulation coated wire equal to or greater than the wire diameter of the displacement prevention portion electromagnetic apparatus characterized by being spaced apart from the folded portion. 前記フェライトコアは１０３Ωｍ以上の固有抵抗を有していることを特徴とする請求項１記載の電磁装置。The electromagnetic device according to claim 1, wherein the ferrite core has a specific resistance of 10 3 Ωm or more. 前記コイル巻線は平角線をエッジワイズに捲き回して成ることを特徴とする請求項１または２記載の電磁装置。  The electromagnetic device according to claim 1, wherein the coil winding is formed by winding a rectangular wire edgewise. 前記コイル巻線は、絶縁部材を介さずに前記フェライトコアの側面に直接捲き回されていることを特徴とする請求項３記載の電磁装置。  The electromagnetic device according to claim 3, wherein the coil winding is directly wound around a side surface of the ferrite core without using an insulating member. 前記フェライトコアは楕円状の断面形状に形成されていることを特徴とする請求項４記載の電磁装置。 The electromagnetic device according to claim 4, wherein the ferrite core is formed in an elliptical cross-sectional shape.
JP2001012224A 2000-09-14 2001-01-19 Electromagnetic device Expired - Fee Related JP3780850B2 (en)

Priority Applications (8)

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JP2001012224A JP3780850B2 (en) 2001-01-19 2001-01-19 Electromagnetic device
EP01965666A EP1324357A4 (en) 2000-09-14 2001-09-14 Electromagnetic device and high-voltage generating device and method of producing electromagnetic device
AU2001286255A AU2001286255A1 (en) 2000-09-14 2001-09-14 Electromagnetic device and high-voltage generating device and method of producing electromagnetic device
US10/129,105 US7142082B2 (en) 2000-09-14 2001-09-14 Electromagnetic device and high-voltage generating device and method of producing electromagnetic device
CNB018027628A CN1181509C (en) 2000-09-14 2001-09-14 Electromagnetic device and high-voltage geratating device and method of producing electromagnetic device
PCT/JP2001/008022 WO2002023561A1 (en) 2000-09-14 2001-09-14 Electromagnetic device and high-voltage generating device and method of producing electromagnetic device
US11/009,152 US20050104698A1 (en) 2000-09-14 2004-12-13 Electromagnetic device, high-voltage generating device, and method for making the electromagnetic device
US11/548,353 US7394340B2 (en) 2000-09-14 2006-10-11 Electromagnetic device, high-voltage generating device, and method for making the electromagnetic device

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